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The concepts, terminology, and syntax of Qt Style Sheets are heavily inspired by HTML \l{http://www.w3.org/Style/CSS/}{Cascading Style Sheets (CSS)} but adapted to the world of widgets. Topics: \list \i \l{Overview} \i \l{The Style Sheet Syntax} \i \l{Qt Designer Integration} \i \l{Customizing Qt Widgets Using Style Sheets} \i \l{Qt Style Sheets Reference} \i \l{Qt Style Sheets Examples} \endlist \target overview \section1 Overview Styles sheets are textual specifications that can be set on the whole application using QApplication::setStyleSheet() or on a specific widget (and its children) using QWidget::setStyleSheet(). If several style sheets are set at different levels, Qt derives the effective style sheet from all of those that are set. This is called cascading. For example, the following style sheet specifies that all \l{QLineEdit}s should use yellow as their background color, and all \l{QCheckBox}es should use red as the text color: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 0 For this kind of customization, style sheets are much more powerful than QPalette. For example, it might be tempting to set the QPalette::Button role to red for a QPushButton to obtain a red push button. However, this wasn't guaranteed to work for all styles, because style authors are restricted by the different platforms' guidelines and (on Windows XP and Mac OS X) by the native theme engine. Style sheets let you perform all kinds of customizations that are difficult or impossible to perform using QPalette alone. If you want yellow backgrounds for mandatory fields, red text for potentially destructive push buttons, or fancy check boxes, style sheets are the answer. Style sheets are applied on top of the current \l{QStyle}{widget style}, meaning that your applications will look as native as possible, but any style sheet constraints will be taken into consideration. Unlike palette fiddling, style sheets offer guarantees: If you set the background color of a QPushButton to be red, you can be assured that the button will have a red background in all styles, on all platforms. In addition, \l{Qt Designer} provides style sheet integration, making it easy to view the effects of a style sheet in different \l{QStyle}{widget styles}. In addition, style sheets can be used to provide a distinctive look and feel for your application, without having to subclass QStyle. For example, you can specify arbitrary images for radio buttons and check boxes to make them stand out. Using this technique, you can also achieve minor customizations that would normally require subclassing several style classes, such as specifying a \l{QStyle::styleHint()}{style hint}. The \l{widgets/stylesheet}{Style Sheet} example depicted below defines two distinctive style sheets that you can try out and modify at will. \table \row \o \inlineimage stylesheet-coffee-xp.png \o \inlineimage stylesheet-pagefold.png \row \o Coffee theme running on Windows XP \o Pagefold theme running on Windows XP \endtable \table \row \o \inlineimage stylesheet-coffee-cleanlooks.png \o \inlineimage stylesheet-pagefold-mac.png \row \o Coffee theme running on Ubuntu Linux \o Pagefold theme running on Mac OS X \endtable When a style sheet is active, the QStyle returned by QWidget::style() is a wrapper "style sheet" style, \e not the platform-specific style. The wrapper style ensures that any active style sheet is respected and otherwise forwards the drawing operations to the underlying, platform-specific style (e.g., QWindowsXPStyle on Windows XP). Since Qt 4.5, Qt style sheets fully supports Mac OS X. \warning Qt style sheets are currently not supported for custom QStyle subclasses. We plan to address this in some future release. */ /*! \page stylesheet-syntax.html \contentspage {Qt Style Sheet}{Contents} \previouspage Qt Style Sheet \nextpage Qt Designer Integration \title The Style Sheet Syntax Qt Style Sheet terminology and syntactic rules are almost identical to those of HTML CSS. If you already know CSS, you can probably skim quickly through this section. \tableofcontents \section1 Style Rules Style sheets consist of a sequence of style rules. A \e{style rule} is made up of a selector and a declaration. The \e{selector} specifies which widgets are affected by the rule; the \e{declaration} specifies which properties should be set on the widget. For example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 1 In the above style rule, \c QPushButton is the selector and \c{{ color: red }} is the declaration. The rule specifies that QPushButton and its subclasses (e.g., \c MyPushButton) should use red as their foreground color. Qt Style Sheet is generally case insensitive (i.e., \c color, \c Color, \c COLOR, and \c cOloR refer to the same property). The only exceptions are class names, \l{QObject::setObjectName()}{object names}, and Qt property names, which are case sensitive. Several selectors can be specified for the same declaration, using commas (\c{,}) to separate the selectors. For example, the rule \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 2 is equivalent to this sequence of three rules: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 3 The declaration part of a style rule is a list of \tt{\e{property}: \e{value}} pairs, enclosed in braces (\c{{}}) and separated with semicolons. For example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 4 See the \l{List of Properties} section below for the list of properties provided by Qt widgets. \section1 Selector Types All the examples so far used the simplest type of selector, the Type Selector. Qt Style Sheets support all the \l{http://www.w3.org/TR/REC-CSS2/selector.html#q1}{selectors defined in CSS2}. The table below summarizes the most useful types of selectors. \table 100% \header \o Selector \o Example \o Explanation \row \o Universal Selector \o \c * \o Matches all widgets. \row \o Type Selector \o \c QPushButton \o Matches instances of QPushButton and of its subclasses. \row \o Property Selector \o \c{QPushButton[flat="false"]} \o Matches instances of QPushButton that are not \l{QPushButton::}{flat}. You may use this selector to test for any Qt \l{Qt's Property System}{property} that supports QVariant::toString() (see the \l{QVariant::}{toString()} function documentation for details). In addition, the special \c class property is supported, for the name of the class. This selector may also be used to test dynamic properties. For more information on customization using dynamic properties, refer to \l{Customizing Using Dynamic Properties}. Instead of \c =, you can also use \c ~= to test whether a Qt property of type QStringList contains a given QString. \warning If the value of the Qt property changes after the style sheet has been set, it might be necessary to force a style sheet recomputation. One way to achieve this is to unset the style sheet and set it again. \row \o Class Selector \o \c .QPushButton \o Matches instances of QPushButton, but not of its subclasses. This is equivalent to \c{*[class~="QPushButton"]}. \row \o ID \target ID Selector Selector \o \c{QPushButton#okButton} \o Matches all QPushButton instances whose \l{QObject::objectName}{object name} is \c okButton. \row \o Descendant Selector \o \c{QDialog QPushButton} \o Matches all instances of QPushButton that are descendants (children, grandchildren, etc.) of a QDialog. \row \o Child Selector \o \c{QDialog > QPushButton} \o Matches all instances of QPushButton that are direct children of a QDialog. \endtable \section1 Sub-Controls For styling complex widgets, it is necessary to access subcontrols of the widget, such as the drop-down button of a QComboBox or the up and down arrows of a QSpinBox. Selectors may contain \e{subcontrols} that make it possible to restrict the application of a rule to specific widget subcontrols. For example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 5 The above rule styles the drop-down button of all \l{QComboBox}es. Although the double-colon (\c{::}) syntax is reminiscent of CSS3 Pseudo-Elements, Qt Sub-Controls differ conceptually from these and have different cascading semantics. Sub-controls are always positioned with respect to another element - a reference element. This reference element could be the widget or another Sub-control. For example, the \l{Qt Style Sheets Reference#drop-down-sub} {::drop-down} of a QComboBox is placed, by default, in the top right corner of the Padding rectangle of the QComboBox. The \l{Qt Style Sheets Reference#drop-down-sub}{::drop-down} is placed, by default, in the Center of the Contents rectangle of the \l{Qt Style Sheets Reference#drop-down-sub}{::drop-down} Sub-control. See the \l{List of Stylable Widgets} below for the Sub-controls to use to style a widget and their default positions. The origin rectangle to be used can be changed using the \l{Qt Style Sheets Reference#subcontrol-origin-prop}{subcontrol-origin} property. For example, if we want to place the drop-down in the margin rectangle of the QComboBox instead of the default Padding rectangle, we can specify: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 6 The alignment of the drop-down within the Margin rectangle is changed using \l{Qt Style Sheets Reference#subcontrol-position-prop} {subcontrol-position} property. The \l{Qt Style Sheets Reference#width-prop}{width} and \l{Qt Style Sheets Reference#height-prop}{height} properties can be used to control the size of the Sub-control. Note that setting a \l{Qt Style Sheets Reference#image-prop}{image} implicitly sets the size of a Sub-control. The relative positioning scheme (\l{Qt Style Sheets Reference#position-prop}{position} : relative), allows the position of the Sub-Control to be offset from its initial position. For example, when the QComboBox's drop-down button is pressed, we might like the arrow inside to be offset to give a "pressed" effect. To achieve this, we can specify: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 7 The absolute positioning scheme (\l{Qt Style Sheets Reference#position-prop}{position} : absolute), allows the position and size of the Sub-control to be changed with respect to the reference element. Once positioned, they are treated the same as widgets and can be styled using the \l{box model}. See the \l{List of Sub-Controls} below for a list of supported sub-controls, and \l{Customizing the QPushButton's Menu Indicator Sub-Control} for a realistic example. \note With complex widgets such as QComboBox and QScrollBar, if one property or sub-control is customized, \bold{all} the other properties or sub-controls must be customized as well. \section1 Pseudo-States Selectors may contain \e{pseudo-states} that denote that restrict the application of the rule based on the widget's state. Pseudo-states appear at the end of the selector, with a colon (\c{:}) in between. For example, the following rule applies when the mouse hovers over a QPushButton: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 8 Pseudo-states can be negated using the exclamation operator. For example, the following rule applies when the mouse does not hover over a QRadioButton: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 9 Pseudo-states can be chained, in which case a logical AND is implied. For example, the following rule applies to when the mouse hovers over a checked QCheckBox: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 10 Negated Pseudo-states may appear in Pseudo-state chains. For example, the following rule applies when the mouse hovers over a QPushButton that is not pressed: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 11 If needed, logical OR can be expressed using the comma operator: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 12 Pseudo-states can appear in combination with subcontrols. For example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 13 See the \l{List of Pseudo-States} section below for the list of pseudo-states provided by Qt widgets. \section1 Conflict Resolution Conflicts arise when several style rules specify the same properties with different values. Consider the following style sheet: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 14 Both rules match QPushButton instances called \c okButton and there is a conflict for the \c color property. To resolve this conflict, we must take into account the \e specificity of the selectors. In the above example, \c{QPushButton#okButton} is considered more specific than \c QPushButton, because it (usually) refers to a single object, not to all instances of a class. Similarly, selectors with pseudo-states are more specific than ones that do not specify pseudo-states. Thus, the following style sheet specifies that a \l{QPushButton} should have white text when the mouse is hovering over it, otherwise red text: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 15 Here's a tricky one: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 16 Here, both selectors have the same specificity, so if the mouse hovers over the button while it is enabled, the second rule takes precedence. If we want the text to be white in that case, we can reorder the rules like this: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 17 Alternatively, we can make the first rule more specific: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 18 A similar issue arises in conjunction with Type Selectors. Consider the following example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 19 Both rules apply to QPushButton instances (since QPushButton inherits QAbstractButton) and there is a conflict for the \l{Qt Style Sheets Reference#color-prop}{color} property. Because QPushButton inherits QAbstractButton, it might be tempting to assume that \c QPushButton is more specific than \c QAbstractButton. However, for style sheet computations, all Type Selectors have the same specificity, and the rule that appears last takes precedence. In other words, \l{Qt Style Sheets Reference#color-prop}{color} is set to \c gray for all \l{QAbstractButton}s, including \l{QPushButton}s. If we really want \l{QPushButton}s to have red text, we can always reorder the rules. For determining the specificity of a rule, Qt Style Sheets follow the \l{http://www.w3.org/TR/REC-CSS2/cascade.html#specificity}{CSS2 Specification}: \quotation \e{A selector's specificity is calculated as follows:} \list \o \e{count the number of ID attributes in the selector (= a)} \o \e{count the number of other attributes and pseudo-classes in the selector (= b)} \o \e{count the number of element names in the selector (= c)} \o \e{ignore pseudo-elements [i.e., \l{subcontrols}].} \endlist \e{Concatenating the three numbers a-b-c (in a number system with a large base) gives the specificity.} \e{Some examples:} \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 20 \endquotation \section1 Cascading Style sheets can be set on the QApplication, on parent widgets, and on child widgets. An arbitrary widget's effective style sheet is obtained by merging the style sheets set on the widget's ancestors (parent, grandparent, etc.), as well as any style sheet set on the QApplication. When conflicts arise, the widget's own style sheet is always preferred to any inherited style sheet, irrespective of the specificity of the conflicting rules. Likewise, the parent widget's style sheet is preferred to the grandparent's, etc. One consequence of this is that setting a style rule on a widget automatically gives it precedence over other rules specified in the ancestor widgets' style sheets or the QApplication style sheet. Consider the following example. First, we set a style sheet on the QApplication: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 21 Then we set a style sheet on a QPushButton object: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 22 The style sheet on the QPushButton forces the QPushButton (and any child widget) to have blue text, in spite of the more specific rule set provided by the application-wide style sheet. The result would have been the same if we had written \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 23 except that if the QPushButton had children (which is unlikely), the style sheet would have no impact on them. Style sheet cascading is a complex topic. Refer to the \l{http://www.w3.org/TR/CSS2/cascade.html#cascade}{CSS2 Specification} for the gory details. Be aware that Qt currently doesn't implement \c{!important}. \section1 Inheritance In classic CSS, when font and color of an item is not explicitly set, it gets automatically inherited from the parent. When using Qt Style Sheets, a widget does \bold{not} automatically inherit its font and color setting from its parent widget. For example, consider a QPushButton inside a QGroupBox: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 24 The QPushButton does not have an explicit color set. Hence, instead of inheriting color of its parent QGroupBox, it has the system color. If we want to set the color on a QGroupBox and its children, we can write: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 25 In contrast, setting a font and propagate using QWidget::setFont() and QWidget::setPalette() propagates to child widgets. \section1 Widgets inside C++ namespaces The Type Selector can be used to style widgets of a particular type. For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 26 Qt Style Sheet uses QObject::className() of the widget to determine when to apply the Type Selector. When custom widgets are inside namespaces, the QObject::className() returns ::. This conflicts with the syntax for \l{Sub-Controls}. To overcome this problem, when using the Type Selector for widgets inside namespaces, we must replace the "::" with "--". For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 27 \section1 Setting QObject properties From 4.3 and above, any designable Q_PROPERTY can be set using the qproperty- syntax. For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 28 If the property references an enum declared with Q_ENUMS, you should reference its constants by name, i.e., not their numeric value. */ /*! \page stylesheet-designer.html \contentspage {Qt Style Sheet}{Contents} \previouspage The Style Sheet Syntax \nextpage Customizing Qt Widgets Using Style Sheets \title Qt Designer Integration \l{Qt Designer}{Qt Designer} is an excellent tool to preview style sheets. You can right-click on any widget in Designer and select \gui{Change styleSheet...} to set the style sheet. \image designer-stylesheet-options.png In Qt 4.2 and later, \l{Qt Designer}{Qt Designer} also includes a style sheet syntax highlighter and validator. The validator indicates if the syntax is valid or invalid, at the bottom left of the \gui{Edit Style Sheet} dialog. \image designer-validator-highlighter.png When you click \gui{OK} or \gui{Apply}, \QD will automatically display the widget with its new stylesheet. \image designer-stylesheet-usage.png */ /*! \page stylesheet-customizing.html \contentspage {Qt Style Sheet}{Contents} \previouspage Qt Designer Integration \nextpage Qt Style Sheets Reference \title Customizing Qt Widgets Using Style Sheets When using style sheets, every widget is treated as a box with four concentric rectangles: the margin rectangle, the border rectangle, the padding rectangle, and the content rectangle. The box model describes this in further detail. \tableofcontents \target box model \section1 The Box Model The four concentric rectangles appear conceptually as below: \image stylesheet-boxmodel.png \list \o The margin falls outside the border. \o The border is drawn between the margin and the padding. \o The padding falls inside the border, between the border and the actual contents. \o The content is what is left from the original widget or subcontrol once we have removed the margin, the border, and the padding. \endlist The \l{Qt Style Sheets Reference#margin-prop}{margin}, \l{Qt Style Sheets Reference#border-width-prop} {border-width}, and \l{Qt Style Sheets Reference#padding-prop}{padding} properties all default to zero. In that case, all four rectangles (\c margin, \c border, \c padding, and \c content) coincide exactly. You can specify a background for the widget using the \l{Qt Style Sheets Reference#background-image-prop}{background-image} property. By default, the background-image is drawn only for the area inside the border. This can be changed using the \l{Qt Style Sheets Reference#background-clip-prop}{background-clip} property. You can use \l{Qt Style Sheets Reference#background-repeat-prop}{background-repeat} and \l{Qt Style Sheets Reference#background-origin-prop}{background-origin} to control the repetition and origin of the background image. A background-image does not scale with the size of the widget. To provide a "skin" or background that scales along with the widget size, one must use \l{Qt Style Sheets Reference#border-image-prop}{border-image}. Since the border-image property provides an alternate background, it is not required to specify a background-image when border-image is specified. In the case, when both of them are specified, the border-image draws over the background-image. In addition, the \l{Qt Style Sheets Reference#image-prop}{image} property may be used to draw an image over the border-image. The image specified does not tile or stretch and when its size does not match the size of the widget, its alignment is specified using the \l{Qt Style Sheets Reference#image-position-prop}{image-position} property. Unlike background-image and border-image, one may specify a SVG in the image property, in which case the image is scaled automatically according to the widget size. The steps to render a rule are as follows: \list \o Set clip for entire rendering operation (border-radius) \o Draw the background (background-image) \o Draw the border (border-image, border) \o Draw overlay image (image) \endlist \target sub controls \section1 Sub-controls A widget is considered as a hierarchy (tree) of subcontrols drawn on top of each other. For example, the QComboBox draws the drop-down sub-control followed by the down-arrow sub-control. A QComboBox is thus rendered as follows: \list \o Render the QComboBox { } rule \o Render the QComboBox::drop-down { } rule \o Render the QComboBox::down-arrow { } rule \endlist Sub-controls share a parent-child relationship. In the case of QComboBox, the parent of down-arrow is the drop-down and the parent of drop-down is the widget itself. Sub-controls are positioned within their parent using the \l{Qt Style Sheets Reference#subcontrol-position-prop} {subcontrol-position} and \l{Qt Style Sheets Reference#subcontrol-origin-prop}{subcontrol-origin} properties. Once positioned, sub-controls can be styled using the \l{box model}. \note With complex widgets such as QComboBox and QScrollBar, if one property or sub-control is customized, \bold{all} the other properties or sub-controls must be customized as well. */ /*! \page stylesheet-reference.html \contentspage {Qt Style Sheet}{Contents} \previouspage Customizing Qt Widgets Using Style Sheets \nextpage Qt Style Sheets Examples \title Qt Style Sheets Reference Qt Style Sheets support various properties, pseudo-states, and subcontrols that make it possible to customize the look of widgets. \tableofcontents \section1 List of Stylable Widgets The following table lists the Qt widgets that can be customized using style sheets: \table 100% \header \o Widget \o How to Style \row \o QAbstractScrollArea \target qabstractscrollarea-widget \o Supports the \l{box model}. All derivatives of QAbstractScrollArea, including QTextEdit, and QAbstractItemView (all item view classes), support scrollable backgrounds using \l{Qt Style Sheets Reference#background-attachment-prop} {background-attachment}. Setting the background-attachment to \c{fixed} provides a background-image that does not scroll with the viewport. Setting the background-attachment to \c{scroll}, scrolls the background-image when the scroll bars move. See \l{Qt Style Sheets Examples#Customizing QAbstractScrollArea} {Customizing QAbstractScrollArea} for an example. \row \o QCheckBox \target qcheckbox-widget \o Supports the \l{box model}. The check indicator can be styled using the \l{#indicator-sub}{::indicator} subcontrol. By default, the indicator is placed in the Top Left corner of the Contents rectangle of the widget. The \l{#spacing-prop}{spacing} property specifies the spacing between the check indicator and the text. See \l{Qt Style Sheets Examples#Customizing QCheckBox} {Customizing QCheckBox} for an example. \row \o QColumnView \target qcolumnview-widget \o The grip can be styled be using the \l{image-prop}{image} property. The arrow indicators can by styled using the \l{left-arrow-sub}{::left-arrow} subcontrol and the \l{right-arrow-sub}{::right-arrow} subcontrol. \row \o QComboBox \target qcombobox-widget \o The frame around the combobox can be styled using the \l{box model}. The drop-down button can be styled using the \l{#drop-down-sub}{::drop-down} subcontrol. By default, the drop-down button is placed in the top right corner of the padding rectangle of the widget. The arrow mark inside the drop-down button can be styled using the \l{#down-arrow-sub}{::down-arrow} subcontrol. By default, the arrow is placed in the center of the contents rectangle of the drop-down subcontrol. See \l{Qt Style Sheets Examples#Customizing QComboBox}{Customizing QComboBox} for an example. \row \o QDateEdit \target qdateedit-widget \o See \l{#qspinbox-widget}{QSpinBox}. \row \o QDateTimeEdit \target qdatetimeedit-widget \o See \l{#qspinbox-widget}{QSpinBox}. \row \o QDialog \target qdialog-widget \o Supports only the \l{Qt Style Sheets Reference#background-prop}{background}, \l{#background-clip-prop}{background-clip} and \l{#background-origin-prop}{background-origin} properties. \warning Make sure you define the Q_OBJECT macro for your custom widget. \row \o QDialogButtonBox \target qdialogbuttonbox-widget \o The layout of buttons can be altered using the \l{#button-layout-prop}{button-layout} property. \row \o QDockWidget \target qdockwidget-widget \o Supports styling of the title bar and the title bar buttons when docked. The dock widget border can be styled using the \l{#border-prop}{border} property. The \l{#title-sub}{::title} subcontrol can be used to customize the title bar. The close and float buttons are positioned with respect to the \l{title-sub}{::title} subcontrol using the \l{#close-button-sub}{::close-button} and \l{#float-button-sub}{::float-button} respectively. When the title bar is vertical, the \l{#vertical-ps}{:vertical} pseudo class is set. In addition, depending on QDockWidget::DockWidgetFeature, the \l{#closable-ps}{:closable}, \l{#floatable-ps}{:floatable} and \l{#movable-ps}{:movable} pseudo states are set. \note Use QMainWindow::separator to style the resize handle. \warning The style sheet has no effect when the QDockWidget is undocked as Qt uses native top level windows when undocked. See \l{Qt Style Sheets Examples#Customizing QDockWidget} {Customizing QDockWidget} for an example. \row \o QDoubleSpinBox \target qdoublespinbox-widget \o See \l{#qspinbox-widget}{QSpinBox}. \row \o QFrame \target qframe-widget \o Supports the \l{box model}. Since 4.3, setting a stylesheet on a QLabel automatically sets the QFrame::frameStyle property to QFrame::StyledPanel. See \l{Qt Style Sheets Examples#Customizing QFrame}{Customizing QFrame} for an example. \row \o QGroupBox \target qgroupbox-widget \o Supports the \l{box model}. The title can be styled using the \l{#title-sub}{::title} subcontrol. By default, the title is placed depending on QGroupBox::textAlignment. In the case of a checkable QGroupBox, the title includes the check indicator. The indicator is styled using the the \l{#indicator-sub}{::indicator} subcontrol. The \l{#spacing-prop}{spacing} property can be used to control the spacing between the text and indicator. See \l{Qt Style Sheets Examples#Customizing QGroupBox}{Customizing QGroupBox} for an example. \row \o QHeaderView \target qheaderview-widget \o Supports the \l{box model}. The sections of the header view are styled using the \l{#section-sub}{::section} sub control. The \c{section} Sub-control supports the \l{#middle-ps}{:middle}, \l{#first-ps}{:first}, \l{#last-ps}{:last}, \l{#only-one-ps}{:only-one}, \l{#next-selected-ps}{:next-selected}, \l{#previous-selected-ps}{:previous-selected}, \l{#selected-ps}{:selected}, and \l{#checked-ps}{:checked} pseudo states. Sort indicator in can be styled using the \l{#up-arrow-sub}{::up-arrow} and the \l{#down-arrow-sub}{::down-arrow} Sub-control. See \l{Qt Style Sheets Examples#Customizing QHeaderView}{Customizing QHeaderView} for an example. \row \o QLabel \target qlabel-widget \o Supports the \l{box model}. Does not support the \l{#hover-ps}{:hover} pseudo-state. Since 4.3, setting a stylesheet on a QLabel automatically sets the QFrame::frameStyle property to QFrame::StyledPanel. See \l{Qt Style Sheets Examples#Customizing QFrame}{Customizing QFrame} for an example (a QLabel derives from QFrame). \row \o QLineEdit \target qlineedit-widget \o Support the \l{box model}. The color and background of the selected item is styled using \l{#selection-color-prop}{selection-color} and \l{#selection-background-color-prop}{selection-background-color} respectively. The password character can be styled using the \l{#lineedit-password-character-prop}{lineedit-password-character} property. See \l{Qt Style Sheets Examples#Customizing QLineEdit}{Customizing QLineEdit} for an example. \row \o QListView \target qlistview-widget \o Supports the \l{box model}. When \l{QAbstractItemView::alternatingRowColors}{alternating row colors} is enabled, the alternating colors can be styled using the \l{#alternate-background-color-prop}{alternate-background-color} property. The color and background of the selected item is styled using \l{#selection-color-prop}{selection-color} and \l{#selection-background-color-prop}{selection-background-color} respectively. The selection behavior is controlled by the \l{#show-decoration-selected-prop}{show-decoration-selected} property. Use the \l{#item-sub}{::item} subcontrol for more fine grained control over the items in the QListView. See \l{qabstractscrollarea-widget}{QAbsractScrollArea} to style scrollable backgrounds. See \l{Qt Style Sheets Examples#Customizing QListView} {Customzing QListView} for an example. \row \o QListWidget \target qlistwidget-widget \o See \l{#qlistview-widget}{QListView}. \row \o QMainWindow \target qmainwindow-widget \o Supports styling of the separator The separator in a QMainWindow when using QDockWidget is styled using the \l{#separator-sub}{::separator} subcontrol. See \l{Qt Style Sheets Examples#Customizing QMainWindow}{Customizing QMainWindow} for an example. \row \o QMenu \target qmenu-widget \o Supports the \l{box model}. Individual items are styled using the \l{#item-sub}{::item} subcontrol. In addition to the usually supported pseudo states, \c{item} subcontrol supports the \l{#selected-ps}{:selected}, \l{#default-ps}{:default}, \l{#exclusive-ps}{:exclusive} and the \l{#non-exclusive-ps}{non-exclusive} pseudo states. The indicator of checkable menu items is styled using the \l{#indicator-sub}{::indicator} subcontrol. The separator is styled using the \l{#separator-sub}{::separator} subcontrol. For items with a sub menu, the arrow marks are styled using the \l{right-arrow-sub}{right-arrow} and \l{left-arrow-sub}{left-arrow}. The scroller is styled using the \l{#scroller-sub}{::scroller}. The tear-off is styled using the \l{#tearoff-sub}{::tearoff}. See \l{Qt Style Sheets Examples#Customizing QMenu}{Customizing QMenu} for an example. \row \o QMenuBar \target qmenubar-widget \o Supports the \l{box model}. The \l{#spacing-prop}{spacing} property specifies the spacing between menu items. Individual items are styled using the \l{#item-sub}{::item} subcontrol. \warning When running on Qt/Mac, the menu bar is usually embedded into the system-wide menu bar. In this case, the style sheet will have no effect. See \l{Qt Style Sheets Examples#Customizing QMenuBar}{Customizing QMenuBar} for an example. \row \o QMessageBox \target qmessagebox-widget \o The \l{#messagebox-text-interaction-flags-prop} {messagebox-text-interaction-flags} property can be used to alter the interaction with text in the message box. \row \o QProgressBar \target qprogressbar-widget \o Supports the \l{box model}. The chunks of the progress bar can be styled using the \l{#chunk-sub}{::chunk} subcontrol. The chunk is displayed on the Contents rectangle of the widget. If the progress bar displays text, use the \l{text-align-prop}{text-align} property to position the text. Indeterminate progress bars have the \l{#indeterminate-ps}{:indeterminate} pseudo state set. See \l{Qt Style Sheets Examples#Customizing QProgressBar}{Customizing QProgressBar} for an example. \row \o QPushButton \target qpushbutton-widget \o Supports the \l{box model}. Supports the \l{#default-ps}{:default}, \l{#flat-ps}{:flat}, \l{#checked-ps}{:checked} pseudo states. For QPushButton with a menu, the menu indicator is styled using the \l{#menu-indicator-sub}{::menu-indicator} subcontrol. Appearance of checkable push buttons can be customized using the \l{#open-ps}{:open} and \l{#closed-ps}{:closed} pseudo-states. \warning If you only set a background-color on a QPushButton, the background may not appear unless you set the border property to some value. This is because, by default, the QPushButton draws a native border which completely overlaps the background-color. For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 30 See \l{Qt Style Sheets Examples#Customizing QPushButton}{Customizing QPushButton} for an example. \row \o QRadioButton \target qradiobutton-widget \o Supports the \l{box model}. The check indicator can be styled using the \l{#indicator-sub}{::indicator} subcontrol. By default, the indicator is placed in the Top Left corner of the Contents rectangle of the widget. The \l{#spacing-prop}{spacing} property specifies the spacing between the check indicator and the text. See \l{Qt Style Sheets Examples#Customizing QRadioButton} {Customizing QRadioButton} for an example. \row \o QScrollBar \target qscrollbar-widget \o Supports the \l{box model}. The Contents rectangle of the widget is considered to be the groove over which the slider moves. The extent of the QScrollBar (i.e the width or the height depending on the orientation) is set using the \l{#width-prop}{width} or \l{#height-prop}{height} property respectively. To determine the orientation, use the \l{#horizontal-ps}{:horizontal} and the \l{vertical-ps}{:vertical} pseudo states. The slider can be styled using the \l{#handle-sub}{::handle} subcontrol. Setting the \l{#min-width-prop}{min-width} or \l{#min-height-prop}{min-height} provides size contraints for the slider depending on the orientation. The \l{add-line-sub}{::add-line} subcontrol can be used to style the button to add a line. By default, the add-line subcontrol is placed in top right corner of the Border rectangle of the widget. Depending on the orientation the \l{#right-arrow-sub}{::right-arrow} or \l{#down-arrow-sub}{::down-arrow}. By default, the arrows are placed in the center of the Contents rectangle of the add-line subcontrol. The \l{sub-line-sub}{::sub-line} subcontrol can be used to style the button to subtract a line. By default, the sub-line subcontrol is placed in bottom right corner of the Border rectangle of the widget. Depending on the orientation the \l{#left-arrow-sub}{::left-arrow} or \l{#up-arrow-sub}{::up-arrow}. By default, the arrows are placed in the center of the Contents rectangle of the sub-line subcontrol. The \l{sub-page-sub}{::sub-page} subcontrol can be used to style the region of the slider that subtracts a page. The \l{add-page-sub}{::add-page} subcontrol can be used to style the region of the slider that adds a page. See \l{Qt Style Sheets Examples#Customizing QScrollBar}{Customizing QScrollBar} for an example. \row \o QSizeGrip \target qsizegrip-widget \o Supports the \l{#width-prop}{width}, \l{#height-prop}{height}, and \l{#image-prop}{image} properties. See \l{Qt Style Sheets Examples#Customizing QSizeGrip}{Customizing QSizeGrip} for an example. \row \o QSlider \target qslider-widget \o Supports the \l{box model}. For horizontal slides, the \l{min-width-prop}{min-width} and \l{height-prop}{height} properties must be provided. For vertical sliders, the \l{min-height-prop}{min-height} and \l{width-prop}{width} properties must be provided. The groove of the slider is styled using the \l{#groove-sub}{::groove}. The groove is positioned by default in the Contents rectangle of the widget. The thumb of the slider is styled using \l{#handle-sub}{::handle} subcontrol. The subcontrol moves in the Contents rectangle of the groove subcontrol. See \l{Qt Style Sheets Examples#Customizing QSlider}{Customizing QSlider} for an example. \row \o QSpinBox \target qspinbox-widget \o The frame of the spin box can be styled using the \l{box model}. The up button and arrow can be styled using the \l{#up-button-sub}{::up-button} and \l{#up-arrow-sub}{::up-arrow} subcontrols. By default, the up-button is placed in the top right corner in the Padding rectangle of the widget. Without an explicit size, it occupies half the height of its reference rectangle. The up-arrow is placed in the center of the Contents rectangle of the up-button. The down button and arrow can be styled using the \l{#down-button-sub}{::down-button} and \l{#down-arrow-sub}{::down-arrow} subcontrols. By default, the down-button is placed in the bottom right corner in the Padding rectangle of the widget. Without an explicit size, it occupies half the height of its reference rectangle. The bottom-arrow is placed in the center of the Contents rectangle of the bottom-button. See \l{Qt Style Sheets Examples#Customizing QSpinBox}{Customizing QSpinBox} for an example. \row \o QSplitter \target qsplitter-widget \o Supports the \l{box model}. The handle of the splitter is styled using the \l{#handle-sub}{::handle} subcontrol. See \l{Qt Style Sheets Examples#Customizing QSplitter}{Customizing QSplitter} for an example. \row \o QStatusBar \target qstatusbar-widget \o Supports only the \l{Qt Style Sheets Reference#background-prop} {background} property. The frame for individual items can be style using the \l{#item-sub}{::item} subcontrol. See \l{Qt Style Sheets Examples#Customizing QStatusBar}{Customizing QStatusBar} for an example. \row \o QTabBar \target qtabbar-widget \o Individual tabs may be styled using the \l{#tab-sub}{::tab} subcontrol. Close buttons using the \l{#close-button-sub}{::close-button} The tabs support the \l{#only-one-ps}{:only-one}, \l{#first-ps}{:first}, \l{#last-ps}{:last}, \l{#middle-ps}{:middle}, \l{#previous-selected-ps}{:previous--selected}, \l{#next-selected-ps}{:next-selected}, \l{#selected-ps}{:selected} pseudo states. The \l{#top-ps}{:top}, \l{#left-ps}{:left}, \l{#right-ps}{:right}, \l{#bottom-ps}{:bottom} pseudo states depending on the orientation of the tabs. Overlapping tabs for the selected state are created by using negative margins or using the \c{absolute} position scheme. The tear indicator of the QTabBar is styled using the \l{#tear-sub}{::tear} subcontrol. QTabBar used two QToolButtons for its scrollers that can be styled using the \c{QTabBar QToolButton} selector. To specify the width of the scroll button use the \l{#scroller-sub}{::scroller} subcontrol. The alignment of the tabs within the QTabBar is styled using the \l{#Alignment}{alignment} property. \warning To change the position of the QTabBar within a QTabWidget, use the \l{#tab-bar-sub}{tab-bar} subcontrol (and set subcontrol-position). See \l{Qt Style Sheets Examples#Customizing QTabWidget and QTabBar}{Customizing QTabBar} for an example. \row \o QTabWidget \target qtabwidget-widget \o The frame of the tab widget is styled using the \l{#pane-sub}{::pane} subcontrol. The left and right corners are styled using the \l{#left-corner-sub}{::left-corner} and \l{#right-corner-sub}{::right-corner} respectively. The position of the tab bar is controlled using the \l{#tab-bar-sub}{::tab-bar} subcontrol. By default, the subcontrols have positions of a QTabWidget in the QWindowsStyle. To place the QTabBar in the center, set the subcontrol-position of the tab-bar subcontrol. The \l{#top-ps}{:top}, \l{#left-ps}{:left}, \l{#right-ps}{:right}, \l{#bottom-ps}{:bottom} pseudo states depending on the orientation of the tabs. See \l{Qt Style Sheets Examples#Customizing QTabWidget and QTabBar} {Customizing QTabWidget} for an example. \row \o QTableView \target qtableview-widget \o Supports the \l{box model}. When \l{QAbstractItemView::alternatingRowColors}{alternating row colors} is enabled, the alternating colors can be styled using the \l{#alternate-background-color-prop}{alternate-background-color} property. The color and background of the selected item is styled using \l{#selection-color-prop}{selection-color} and \l{#selection-background-color-prop}{selection-background-color} respectively. The corner widget in a QTableView is implemented as a QAbstractButton and can be styled using the "QTableView QTableCornerButton::section" selector. \warning If you only set a background-color on a QTableCornerButton, the background may not appear unless you set the border property to some value. This is because, by default, the QTableCornerButton draws a native border which completely overlaps the background-color. The color of the grid can be specified using the \l{#gridline-color-prop}{gridline-color} property. See \l{qabstractscrollarea-widget}{QAbsractScrollArea} to style scrollable backgrounds. See \l{Qt Style Sheets Examples#Customizing QTableView} {Customzing QTableView} for an example. \row \o QTableWidget \target qtablewidget-widget \o See \l{#qtableview-widget}{QTableView}. \row \o QTextEdit \target qtextedit-widget \o Supports the \l{box model}. The color and background of selected text is styled using \l{#selection-color-prop}{selection-color} and \l{#selection-background-color-prop}{selection-background-color} respectively. See \l{qabstractscrollarea-widget}{QAbsractScrollArea} to style scrollable backgrounds. \row \o QTimeEdit \target qtimeedit-widget \o See \l{#qspinbox-widget}{QSpinBox}. \row \o QToolBar \target qtoolbar-widget \o Supports the \l{box model}. The \l{#top-ps}{:top}, \l{#left-ps}{:left}, \l{#right-ps}{:right}, \l{#bottom-ps}{:bottom} pseudo states depending on the area in which the tool bar is grouped. The \l{#first-ps}{:first}, \l{#last-ps}{:last}, \l{#middle-ps}{:middle}, \l{#only-one-ps}{:only-one} pseudo states indicator the position of the tool bar within a line group (See QStyleOptionToolBar::positionWithinLine). The separator of a QToolBar is styled using the \l{#separator-sub}{::separator} subcontrol. The handle (to move the toolbar) is styled using the \l{#handle-sub}{::handle} subcontrol. See \l{Qt Style Sheets Examples#Customizing QToolBar}{Customizing QToolBar} for an example. \row \o QToolButton \target qtoolbutton-widget \o Supports the \l{box model}. If the QToolButton has a menu, is \l{#menu-indicator-sub}{::menu-indicator} subcontrol can be used to style the indicator. By default, the menu-indicator is positioned at the bottom right of the Padding rectangle of the widget. If the QToolButton is in QToolButton::MenuButtonPopup mode, the \l{#menu-button-sub}{::menu-button} subcontrol is used to draw the menu button. \l{#menu-arrow-sub}{::menu-arrow} subcontrol is used to draw the menu arrow inside the menu-button. By default, it is positioned in the center of the Contents rectangle of the menu-button subcontrol. When the QToolButton displays arrows, the \l{#up-arrow-sub}{::up-arrow}, \l{#down-arrow-sub}{::down-arrow}, \l{#left-arrow-sub}{::left-arrow} and \l{#right-arrow-sub}{::right-arrow} subcontrols are used. \warning If you only set a background-color on a QToolButton, the background will not appear unless you set the border property to some value. This is because, by default, the QToolButton draws a native border which completely overlaps the background-color. For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 31 See \l{Qt Style Sheets Examples#Customizing QToolButton}{Customizing QToolButton} for an example. \row \o QToolBox \target qtoolbox-widget \o Supports the \l{box model}. The individual tabs can by styled using the \l{#tab-sub}{::tab} subcontrol. The tabs support the \l{#only-one-ps}{:only-one}, \l{#first-ps}{:first}, \l{#last-ps}{:last}, \l{#middle-ps}{:middle}, \l{#previous-selected-ps}{:previous-selected}, \l{#next-selected-ps}{:next-selected}, \l{#selected-ps}{:selected} pseudo states. \row \o QToolTip \target qtooltip-widget \o Supports the \l{box model}. The \l{#opacity-prop}{opacity} property controls the opacity of the tooltip. See \l{Qt Style Sheets Examples#Customizing QFrame}{Customizing QFrame} for an example (a QToolTip is a QFrame). \row \o QTreeView \target qtreeview-widget \o Supports the \l{box model}. When \l{QAbstractItemView::alternatingRowColors}{alternating row colors} is enabled, the alternating colors can be styled using the \l{#alternate-background-color-prop}{alternate-background-color} property. The color and background of the selected item is styled using \l{#selection-color-prop}{selection-color} and \l{#selection-background-color-prop}{selection-background-color} respectively. The selection behavior is controlled by the \l{#show-decoration-selected-prop}{show-decoration-selected} property. The branches of the tree view can be styled using the \l{#branch-sub}{::branch} subcontrol. The ::branch Sub-control supports the \l{open-ps}{:open}, \l{closed-ps}{:closed}, \l{has-siblings-ps}{:has-sibling} and \l{has-children-ps}{:has-children} pseudo states. Use the \l{#item-sub}{::item} subcontrol for more fine grained control over the items in the QTreeView. See \l{qabstractscrollarea-widget}{QAbsractScrollArea} to style scrollable backgrounds. See \l{Qt Style Sheets Examples#Customizing QTreeView}{Customizing QTreeView} for an example to style the branches. \row \o QTreeWidget \target qtreewidget-widget \o See \l{#qtreeview-widget}{QTreeView}. \row \o QWidget \target qwidget-widget \o Supports only the \l{Qt Style Sheets Reference#background-prop}{background}, \l{#background-clip-prop}{background-clip} and \l{#background-origin-prop}{background-origin} properties. If you subclass from QWidget, you need to provide a paintEvent for your custom QWidget as below: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 32 The above code is a no-operation if there is no stylesheet set. \warning Make sure you define the Q_OBJECT macro for your custom widget. \endtable \section1 List of Properties The table below lists all the properties supported by Qt Style Sheets. Which values can be given to an property depend on the \l{List of Property Types}{property's type}. Unless otherwise specified, properties below apply to all widgets. Properties marked with an asterisk * are specific to Qt and have no equivalent in CSS2 or CSS3. \table 100% \header \o Property \o Type \o Description \row \o \bold{\c alternate-background-color} \target alternate-background-color-prop \o \l{#Brush}{Brush} \BR \o The \l{QAbstractItemView::alternatingRowColors} {alternate background color} used in QAbstractItemView subclasses. If this property is not set, the default value is whatever is set for the palette's \l{QPalette::}{AlternateBase} role. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 33 See also \l{Qt Style Sheets Reference#background-prop}{background} and \l{#selection-background-color-prop}{selection-background-color}. \row \o \bold{\c background} \target background-prop \o \l{#Background}{Background} \o Shorthand notation for setting the background. Equivalent to specifying \c background-color, \c background-image, \c background-repeat, and/or \c background-position. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QDialog, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, QToolTip, and plain \l{QWidget}s. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 34 Often, it is required to set a fill pattern similar to the styles in Qt::BrushStyle. You can use the background-color property for Qt::SolidPattern, Qt::RadialGradientPattern, Qt::LinearGradientPattern and Qt::ConicalGradientPattern. The other patterns are easily achieved by creating a background image that contains the pattern. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 35 See also \l{#background-origin-prop}{background-origin}, \l{#selection-background-color-prop}{selection-background-color}, \l{#background-clip-prop}{background-clip}, \l{#background-attachment-prop}{background-attachment} and \l{#alternate-background-color-prop}{alternate-background-color}. \row \o \c background-color \target background-color-prop \o \l{#Brush}{Brush} \BR \o The background color used for the widget. Examples: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 36 \row \o \c background-image \target background-image-prop \o \l{#Url}{Url} \o The background image used for the widget. Semi-transparent parts of the image let the \c background-color shine through. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 37 \row \o \c background-repeat \target background-repeat-prop \o \l{#Repeat}{Repeat} \o Whether and how the background image is repeated to fill the \c background-origin rectangle. If this property is not specified, the background image is repeated in both directions (\c repeat). Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 38 \row \o \c background-position \o \l{#Alignment}{Alignment} \o The alignment of the background image within the \c background-origin rectangle. If this property is not specified, the alignment is \c top \c left. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 39 \row \o \bold{\c background-attachment} \target background-attachment-prop \o \l{#Attachment}{Attachment} \o Determines whether the background-image in a QAbstractScrollArea is scrolled or fixed with respect to the viewport. By default, the background-image scrolls with the viewport. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 40 See also \l{Qt Style Sheets Reference#background-prop}{background} \row \o \bold{\c background-clip} \target background-clip-prop \o \l{#Origin}{Origin} \o The widget's rectangle, in which the \c background is drawn. This property specifies the rectangle to which the \c background-color and \c background-image are clipped. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QDialog, QFrame, QGroupBox, QLabel, QPushButton, QRadioButton, QSplitter, QTextEdit, QToolTip, and plain \l{QWidget}s. If this property is not specified, the default is \c border. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 41 See also \l{Qt Style Sheets Reference#background-prop}{background}, \l{#background-origin-prop}{background-origin} and \l{The Box Model}. \row \o \bold{\c background-origin} \target background-origin-prop \o \l{#Origin}{Origin} \o The widget's background rectangle, to use in conjunction with \c background-position and \c background-image. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QDialog, QFrame, QGroupBox, QLabel, QPushButton, QRadioButton, QSplitter, QTextEdit, QToolTip, and plain \l{QWidget}s. If this property is not specified, the default is \c padding. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 42 See also \l{Qt Style Sheets Reference#background-prop}{background} and \l{The Box Model}. \row \o \bold{\c border} \target border-prop \o \l{#Border}{Border} \o Shorthand notation for setting the widget's border. Equivalent to specifying \c border-color, \c border-style, and/or \c border-width. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, QToolTip, and plain \l{QWidget}s. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 43 \row \o \c border-top \o \l{#Border}{Border} \o Shorthand notation for setting the widget's top border. Equivalent to specifying \c border-top-color, \c border-top-style, and/or \c border-top-width. \row \o \c border-right \o \l{#Border}{Border} \o Shorthand notation for setting the widget's right border. Equivalent to specifying \c border-right-color, \c border-right-style, and/or \c border-right-width. \row \o \c border-bottom \o \l{#Border}{Border} \o Shorthand notation for setting the widget's bottom border. Equivalent to specifying \c border-bottom-color, \c border-bottom-style, and/or \c border-bottom-width. \row \o \c border-left \o \l{#Border}{Border} \o Shorthand notation for setting the widget's left border. Equivalent to specifying \c border-left-color, \c border-left-style, and/or \c border-left-width. \row \o \bold{\c border-color} \target border-attrs \target border-color-prop \o \l{#Box Colors}{Box Colors} \o The color of all the border's edges. Equivalent to specifying \c border-top-color, \c border-right-color, \c border-bottom-color, and \c border-left-color. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, QToolTip, and plain \l{QWidget}s. If this property is not specified, it defaults to \l{#color-prop}{color} (i.e., the widget's foreground color). Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 44 See also \l{Qt Style Sheets Reference#border-style-prop}{border-style}, \l{Qt Style Sheets Reference#border-width-prop}{border-width}, \l{#border-image-prop}{border-image}, and \l{The Box Model}. \row \o \c border-top-color \o \l{#Brush}{Brush} \BR \o The color of the border's top edge. \row \o \c border-right-color \o \l{#Brush}{Brush} \BR \o The color of the border's right edge. \row \o \c border-bottom-color \o \l{#Brush}{Brush} \BR \o The color of the border's bottom edge. \row \o \c border-left-color \o \l{#Brush}{Brush} \BR \o The color of the border's left edge. \row \o \bold{\c border-image} \target border-image-prop \o \l{#Border Image}{Border Image} \o The image used to fill the border. The image is cut into nine parts and stretched appropriately if necessary. See \l{#Border Image}{Border Image} for details. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit and QToolTip. See also \l{#border-color-prop}{border-color}, \l{Qt Style Sheets Reference#border-style-prop}{border-style}, \l{Qt Style Sheets Reference#border-width-prop}{border-width}, and \l{The Box Model}. \row \o \bold{\c border-radius} \target border-radius-prop \o \l{#Radius}{Radius} \o The radius of the border's corners. Equivalent to specifying \c border-top-left-radius, \c border-top-right-radius, \c border-bottom-right-radius, and \c border-bottom-left-radius. The border-radius clips the element's \l{Qt Style Sheets Reference#background-prop}{background}. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, and QToolTip. If this property is not specified, it defaults to 0. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 45 See also \l{Qt Style Sheets Reference#border-width-prop}{border-width} and \l{The Box Model}. \row \o \c border-top-left-radius \o \l{#Radius}{Radius} \o The radius of the border's top-left corner. \row \o \c border-top-right-radius \o \l{#Radius}{Radius} \o The radius of the border's top-right corner. \row \o \c border-bottom-right-radius \o \l{#Radius}{Radius} \o The radius of the border's bottom-right corner. Setting this property to a positive value results in a rounded corner. \row \o \c border-bottom-left-radius \o \l{#Radius}{Radius} \o The radius of the border's bottom-left corner. Setting this property to a positive value results in a rounded corner. \row \o \bold{\c border-style} \target border-style-prop \o \l {Border Style} \o The style of all the border's edges. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, and QToolTip. If this property is not specified, it defaults to \c none. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 46 See also \l{#border-color-prop}{border-color}, \l{Qt Style Sheets Reference#border-style-prop}{border-style}, \l{#border-image-prop}{border-image}, and \l{The Box Model}. \row \o \c border-top-style \o \l{#Border Style}{Border Style} \o The style of the border's top edge. \row \o \c border-right-style \o \l{#Border Style}{Border Style} \o The style of the border's right edge/ \row \o \c border-bottom-style \o \l{#Border Style}{Border Style} \o The style of the border's bottom edge. \row \o \c border-left-style \o \l{#Border Style}{Border Style} \o The style of the border's left edge. \row \o \bold{\c border-width} \target border-width-prop \o \l{#Box Lengths}{Box Lengths} \o The width of the border. Equivalent to setting \c border-top-width, \c border-right-width, \c border-bottom-width, and \c border-left-width. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, and QToolTip. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 47 See also \l{#border-color-prop}{border-color}, \l{#border-radius-prop}{border-radius}, \l{Qt Style Sheets Reference#border-style-prop}{border-style}, \l{#border-image-prop}{border-image}, and \l{The Box Model}. \row \o \c border-top-width \o \l{#Length}{Length} \o The width of the border's top edge. \row \o \c border-right-width \o \l{#Length}{Length} \o The width of the border's right edge. \row \o \c border-bottom-width \o \l{#Length}{Length} \o The width of the border's bottom edge. \row \o \c border-left-width \o \l{#Length}{Length} \o The width of the border's left edge. \row \o \bold{\c bottom} \target bottom-prop \o \l{#Length}{Length} \o If \l{#position-prop}{position} is \c relative (the default), moves a \l{subcontrol} by a certain offset up; specifying \tt{bottom: \e{y}} is then equivalent to specifying \tt{\l{Qt Style Sheets Reference#top-prop}{top}: -\e{y}}. If \l{#position-prop}{position} is \c absolute, the \c bottom property specifies the subcontrol's bottom edge in relation to the parent's bottom edge (see also \l{Qt Style Sheets Reference#subcontrol-origin-prop} {subcontrol-origin}). Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 48 See also \l{Qt Style Sheets Reference#left-prop}{left}, \l{#right-prop}{right}, and \l{Qt Style Sheets Reference#top-prop}{top}. \row \o \bold{\c button-layout} \target button-layout-prop \o \l{#Number}{Number} \o The layout of buttons in a QDialogButtonBox or a QMessageBox. The possible values are 0 (\l{QDialogButtonBox::}{WinLayout}), 1 (\l{QDialogButtonBox::}{MacLayout}), 2 (\l{QDialogButtonBox::}{KdeLayout}), and 3 (\l{QDialogButtonBox::}{GnomeLayout}). If this property is not specified, it defaults to the value specified by the current style for the \l{QStyle::}{SH_DialogButtonLayout} style hint. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 49 \row \o \bold{\c color} \target color-prop \o \l{#Brush}{Brush} \BR \o The color used to render text. This property is supported by all widgets that respect the \l QWidget::palette. If this property is not set, the default is whatever is set for in the widget's palette for the QWidget::foregroundRole (typically black). Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 50 See also \l{Qt Style Sheets Reference#background-prop}{background} and \l{#selection-color-prop}{selection-color}. \row \o \bold{\c dialogbuttonbox-buttons-have-icons} \o \l{#Boolean}{Boolean} \o Whether the buttons in a QDialogButtonBox show icons If this property is set to 1, the buttons of a QDialogButtonBox show icons; if it is set to 0, the icons are not shown. See the \l{Qt Style Sheets Reference#list of icons}{List of Icons} section for information on how to set icons. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 51 \note Styles defining this property must be applied before the QDialogButtonBox is created; this means that you must apply the style to the parent widget or to the application itself. \omit \row \o \bold{\c etch-disabled-text}* \o \l{#Boolean}{Boolean} \o Whether disabled text is drawn etched. If this property is not specified, it defaults to the value specified by the current style for the \l{QStyle::}{SH_EtchDisabledText} style hint. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 52 \endomit \row \o \bold{\c font} \target font-prop \o \l{#Font}{Font} \o Shorthand notation for setting the text's font. Equivalent to specifying \c font-family, \c font-size, \c font-style, and/or \c font-weight. This property is supported by all widgets that respect the \l QWidget::font. If this property is not set, the default is the QWidget::font. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 53 \row \o \c font-family \o String \o The font family. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 54 \row \o \c font-size \o \l{#Font Size}{Font Size} \o The font size. In this version of Qt, only pt and px metrics are supported. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 55 \row \o \c font-style \o \l {Font Style} \o The font style. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 56 \row \o \c font-weight \o \l{#Font Weight}{Font Weight} \o The weight of the font. \row \o \bold{\c gridline-color}* \target gridline-color-prop \o \l{#Color}{Color} \BR \o The color of the grid line in a QTableView. If this property is not specified, it defaults to the value specified by the current style for the \l{QStyle::}{SH_Table_GridLineColor} style hint. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 57 \row \o \bold{\c height} \target height-prop \o \l{#Length}{Length} \o The height of a \l{subcontrol} (or in some case, a widget). If this property is not specified, it defaults to a value that depends on the subcontrol/widget and on the current style. \warning Unless otherwise specified, this property has no effect when set on widgets. If you want a widget with a fixed height, set the \l{#min-width-prop}{min-height} and \l{#max-width-prop}{max-height} to the same value. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 58 See also \l{#width-prop}{width}. \row \o \bold{\c icon-size} \target icon-size-prop \o \l{#Length}{Length} \o The width and height of the icon in a widget. The icon size of the following widgets can be set using this property. \list \i QCheckBox \i QListView \i QPushButton \i QRadioButton \i QTabBar \i QToolBar \i QToolBox \i QTreeView \endlist \row \o \bold{\c image}* \target image-prop \o \l{#Url}{Url}+ \o The image that is drawn in the contents rectangle of a \l{subcontrol}. The image property accepts a list of \l{#Url}{Url}s or an \c{svg}. The actual image that is drawn is determined using the same algorithm as QIcon (i.e) the image is never scaled up but always scaled down if necessary. If a \c{svg} is specified, the image is scaled to the size of the contents rectangle. Setting the image property on sub controls implicitly sets the width and height of the sub-control (unless the image in a SVG). In Qt 4.3 and later, the alignment of the image within the rectangle can be specified using \l{image-position-prop}{image-position}. This property is for \l{subcontrol}s only--we don't support it for other elements. \warning The QIcon SVG plugin is needed to render SVG images. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 59 \row \o \bold{\c image-position} \target image-position-prop \o \l{#Alignment}{alignment} \o In Qt 4.3 and later, the alignment of the image image's position can be specified using relative or absolute position. \row \o \bold{\c left} \target left-prop \o \l{#Length}{Length} \o If \l{#position-prop}{position} is \c relative (the default), moves a \l{subcontrol} by a certain offset to the right. If \l{#position-prop}{position} is \c absolute, the \c left property specifies the subcontrol's left edge in relation to the parent's left edge (see also \l{Qt Style Sheets Reference#subcontrol-origin-prop}{subcontrol-origin}). If this property is not specified, it defaults to \c 0. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 60 See also \l{#right-prop}{right}, \l{Qt Style Sheets Reference#top-prop}{top}, and \l{#bottom-prop}{bottom}. \row \o \bold{\c lineedit-password- \BR \c character}* \target lineedit-password-character-prop \o \l{#Number}{Number} \o The QLineEdit password character as a Unicode number. If this property is not specified, it defaults to the value specified by the current style for the \l{QStyle::}{SH_LineEdit_PasswordCharacter} style hint. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 61 \row \o \bold{\c margin} \target margin-prop \o \l {Box Lengths} \o The widget's margins. Equivalent to specifying \c margin-top, \c margin-right, \c margin-bottom, and \c margin-left. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, and QToolTip. If this property is not specified, it defaults to \c 0. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 62 See also \l{Qt Style Sheets Reference#padding-prop}{padding}, \l{#spacing-prop}{spacing}, and \l{The Box Model}. \row \o \c margin-top \o \l{#Length}{Length} \o The widget's top margin. \row \o \c margin-right \o \l{#Length}{Length} \o The widget's right margin. \row \o \c margin-bottom \o \l{#Length}{Length} \o The widget's bottom margin. \row \o \c margin-left \o \l{#Length}{Length} \o The widget's left margin. \row \o \bold{\c max-height} \target max-height-prop \o \l{#Length}{Length} \o The widget's or a subcontrol's maximum height. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSizeGrip, QSpinBox, QSplitter, QStatusBar, QTextEdit, and QToolTip. The value is relative to the contents rect in the \l{The Box Model}{box model}. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 63 See also \l{#max-width-prop}{max-width}. \row \o \bold{\c max-width} \target max-width-prop \o \l{#Length}{Length} \o The widget's or a subcontrol's maximum width. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSizeGrip, QSpinBox, QSplitter, QStatusBar, QTextEdit, and QToolTip. The value is relative to the contents rect in the \l{The Box Model}{box model}. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 64 See also \l{#max-height-prop}{max-height}. \row \o \bold{\c messagebox-text- \target messagebox-text-interaction-flags-prop \BR \c interaction-flags}* \o \l{#Number}{Number} \o The interaction behavior for text in a message box. Possible values are based on Qt::TextInteractionFlags. If this property is not specified, it defaults to the value specified by the current style for the \l{QStyle::}{SH_MessageBox_TextInteractionFlags} style hint. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 65 \row \o \bold{\c min-height} \target min-height-prop \o \l{#Length}{Length} \o The widget's or a subcontrol's minimum height. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSizeGrip, QSpinBox, QSplitter, QStatusBar, QTextEdit, and QToolTip. If this property is not specified, the minimum height is derived based on the widget's contents and the style. The value is relative to the contents rect in the \l{The Box Model}{box model}. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 66 See also \l{#min-width-prop}{min-width}. \row \o \bold{\c min-width} \target min-width-prop \o \l{#Length}{Length} \o The widget's or a subcontrol's minimum width. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSizeGrip, QSpinBox, QSplitter, QStatusBar, QTextEdit, and QToolTip. If this property is not specified, the minimum width is derived based on the widget's contents and the style. The value is relative to the contents rect in the \l{The Box Model}{box model}. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 67 See also \l{#min-height-prop}{min-height}. \row \o \bold{\c opacity}* \target opacity-prop \o \l{#Number}{Number} \o The opacity for a widget. Possible values are from 0 (transparent) to 255 (opaque). For the moment, this is only supported for \l{QToolTip}{tooltips}. If this property is not specified, it defaults to the value specified by the current style for the \l{QStyle::}{SH_ToolTipLabel_Opacity} style hint. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 68 \row \o \bold{\c padding} \target padding-prop \o \l{#Box Lengths}{Box Lengths} \o The widget's padding. Equivalent to specifying \c padding-top, \c padding-right, \c padding-bottom, and \c padding-left. This property is supported by QAbstractItemView subclasses, QAbstractSpinBox subclasses, QCheckBox, QComboBox, QFrame, QGroupBox, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QRadioButton, QSplitter, QTextEdit, and QToolTip. If this property is not specified, it defaults to \c 0. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 69 See also \l{#margin-prop}{margin}, \l{#spacing-prop}{spacing}, and \l{The Box Model}. \row \o \c padding-top \o \l{#Length}{Length} \o The widget's top padding. \row \o \c padding-right \o \l{#Length}{Length} \o The widget's right padding. \row \o \c padding-bottom \o \l{#Length}{Length} \o The widget's bottom padding. \row \o \c padding-left \o \l{#Length}{Length} \o The widget's left padding. \row \o \bold{\c paint-alternating-row-colors-for-empty-area} \target paint-alternating-row-colors-for-empty-area-prop \o \c bool \o Whether the QTreeView paints alternating row colors for the empty area (i.e the area where there are no items) \row \o \bold{\c position} \target position-prop \o \c relative \BR | \c absolute \o Whether offsets specified using \l{Qt Style Sheets Reference#left-prop}{left}, \l{#right-prop}{right}, \l{Qt Style Sheets Reference#top-prop}{top}, and \l{#bottom-prop}{bottom} are relative or absolute coordinates. If this property is not specified, it defaults to \c relative. \row \o \bold{\c right} \target right-prop \o \l{#Length}{Length} \o If \l{#position-prop}{position} is \c relative (the default), moves a \l{subcontrol} by a certain offset to the left; specifying \tt{right: \e{x}} is then equivalent to specifying \tt{\l{Qt Style Sheets Reference#left-prop}{left}: -\e{x}}. If \l{#position-prop}{position} is \c absolute, the \c right property specifies the subcontrol's right edge in relation to the parent's right edge (see also \l{Qt Style Sheets Reference#subcontrol-origin-prop}{subcontrol-origin}). Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 70 See also \l{Qt Style Sheets Reference#left-prop}{left}, \l{Qt Style Sheets Reference#top-prop}{top}, and \l{#bottom-prop}{bottom}. \row \o \bold{\c selection-background-color}* \target selection-background-color-prop \o \l{#Brush}{Brush} \BR \o The background of selected text or items. This property is supported by all widgets that respect the \l QWidget::palette and that show selection text. If this property is not set, the default value is whatever is set for the palette's \l{QPalette::}{Highlight} role. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 71 See also \l{#selection-color-prop}{selection-color} and \l{Qt Style Sheets Reference#background-prop}{background}. \row \o \bold{\c selection-color}* \target selection-color-prop \o \l{#Brush}{Brush} \BR \o The foreground of selected text or items. This property is supported by all widgets that respect the \l QWidget::palette and that show selection text. If this property is not set, the default value is whatever is set for the palette's \l{QPalette::}{HighlightedText} role. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 72 See also \l{#selection-background-color-prop}{selection-background-color} and \l{#color-prop}{color}. \row \o \bold{\c show-decoration- \target show-decoration-selected-prop \BR \c selected}* \o \l{#Boolean}{Boolean} \o Controls whether selections in a QListView cover the entire row or just the extent of the text. If this property is not specified, it defaults to the value specified by the current style for the \l{QStyle::}{SH_ItemView_ShowDecorationSelected} style hint. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 73 \row \o \bold{\c spacing}* \target spacing-prop \o \l{#Length}{Length} \o Internal spacing in the widget. This property is supported by QCheckBox, checkable \l{QGroupBox}es, QMenuBar, and QRadioButton. If this property is not specified, the default value depends on the widget and on the current style. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 74 See also \l{Qt Style Sheets Reference#padding-prop}{padding} and \l{#margin-prop}{margin}. \row \o \bold{\c subcontrol-origin}* \target subcontrol-origin-prop \o \l{#Origin}{Origin} \o The origin rectangle of the \l subcontrol within the parent element. If this property is not specified, the default is \c padding. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 75 See also \l{Qt Style Sheets Reference#subcontrol-position-prop}{subcontrol-position}. \row \o \bold{\c subcontrol-position}* \target subcontrol-position-prop \o \l{#Alignment}{Alignment} \o The alignment of the \l subcontrol within the origin rectangle specified by \l{Qt Style Sheets Reference#subcontrol-origin-prop} {subcontrol-origin}. If this property is not specified, it defaults to a value that depends on the subcontrol. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 76 See also \l{Qt Style Sheets Reference#subcontrol-origin-prop}{subcontrol-origin}. \row \o \bold{\c text-align} \target text-align-prop \o \l{#Alignment}{Alignment} \o The alignment of text and icon within the contents of the widget. If this value is not specified, it defaults to the value that depends on the native style. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 77 This property is currently supported only by QPushButton and QProgressBar. \row \o \bold{\c text-decoration} \o \c none \BR \c underline \BR \c overline \BR \c line-through \o Additional text effects \row \o \bold{\c top} \target top-prop \o \l{#Length}{Length} \o If \l{#position-prop}{position} is \c relative (the default), moves a \l{subcontrol} by a certain offset down. If \l{#position-prop}{position} is \c absolute, the \c top property specifies the subcontrol's top edge in relation to the parent's top edge (see also \l{Qt Style Sheets Reference#subcontrol-origin-prop}{subcontrol-origin}). If this property is not specified, it defaults to \c 0. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 78 See also \l{Qt Style Sheets Reference#left-prop}{left}, \l{#right-prop}{right}, and \l{#bottom-prop}{bottom}. \row \o \bold{\c width} \target width-prop \o \l{#Length}{Length} \o The width of a \l{subcontrol} (or a widget in some cases). If this property is not specified, it defaults to a value that depends on the subcontrol/widget and on the current style. \warning Unless otherwise specified, this property has no effect when set on widgets. If you want a widget with a fixed width, set the \l{#min-width-prop}{min-width} and \l{#max-width-prop}{max-width} to the same value. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 79 See also \l{#height-prop}{height}. \endtable \target list of icons \section1 List of Icons Icons used in Qt can be customized using the following properties. Each of the properties listed in this section have the type \l{#Icon}{Icon}. Note that for icons to appear in buttons in a QDialogButtonBox, you need to set the dialogbuttonbox-buttons-have-icons property to true. Also, to customize the size of the icons, use the icon-size property. \table 100% \header \o Name \o QStyle::StandardPixmap \row \o backward-icon \o QStyle::SP_ArrowBack \row \o cd-icon \o QStyle::SP_DriveCDIcon \row \o computer-icon \o QStyle::SP_ComputerIcon \row \o desktop-icon \o QStyle::SP_DesktopIcon \row \o dialog-apply-icon \o QStyle::SP_DialogApplyButton \row \o dialog-cancel-icon \o QStyle::SP_DialogCancelButton \row \o dialog-close-icon \o QStyle::SP_DialogCloseButton \row \o dialog-discard-icon \o QStyle::SP_DialogDiscardButton \row \o dialog-help-icon \o QStyle::SP_DialogHelpButton \row \o dialog-no-icon \o QStyle::SP_DialogNoButton \row \o dialog-ok-icon \o QStyle::SP_DialogOkButton \row \o dialog-open-icon \o QStyle::SP_DialogOpenButton \row \o dialog-reset-icon \o QStyle::SP_DialogResetButton \row \o dialog-save-icon \o QStyle::SP_DialogSaveButton \row \o dialog-yes-icon \o QStyle::SP_DialogYesButton \row \o directory-closed-icon \o QStyle::SP_DirClosedIcon \row \o directory-icon \o QStyle::SP_DirIcon \row \o directory-link-icon \o QStyle::SP_DirLinkIcon \row \o directory-open-icon \o QStyle::SP_DirOpenIcon \row \o dockwidget-close-icon \o QStyle::SP_DockWidgetCloseButton \row \o downarrow-icon \o QStyle::SP_ArrowDown \row \o dvd-icon \o QStyle::SP_DriveDVDIcon \row \o file-icon \o QStyle::SP_FileIcon \row \o file-link-icon \o QStyle::SP_FileLinkIcon \omit \row \o filedialog-backward-icon \o QStyle::SP_FileDialogBack \endomit \row \o filedialog-contentsview-icon \o QStyle::SP_FileDialogContentsView \row \o filedialog-detailedview-icon \o QStyle::SP_FileDialogDetailedView \row \o filedialog-end-icon \o QStyle::SP_FileDialogEnd \row \o filedialog-infoview-icon \o QStyle::SP_FileDialogInfoView \row \o filedialog-listview-icon \o QStyle::SP_FileDialogListView \row \o filedialog-new-directory-icon \o QStyle::SP_FileDialogNewFolder \row \o filedialog-parent-directory-icon \o QStyle::SP_FileDialogToParent \row \o filedialog-start-icon \o QStyle::SP_FileDialogStart \row \o floppy-icon \o QStyle::SP_DriveFDIcon \row \o forward-icon \o QStyle::SP_ArrowForward \row \o harddisk-icon \o QStyle::SP_DriveHDIcon \row \o home-icon \o QStyle::SP_DirHomeIcon \row \o leftarrow-icon \o QStyle::SP_ArrowLeft \row \o messagebox-critical-icon \o QStyle::SP_MessageBoxCritical \row \o messagebox-information-icon \o QStyle::SP_MessageBoxInformation \row \o messagebox-question-icon \o QStyle::SP_MessageBoxQuestion \row \o messagebox-warning-icon \o QStyle::SP_MessageBoxWarning \row \o network-icon \o QStyle::SP_DriveNetIcon \row \o rightarrow-icon \o QStyle::SP_ArrowRight \row \o titlebar-contexthelp-icon \o QStyle::SP_TitleBarContextHelpButton \row \o titlebar-maximize-icon \o QStyle::SP_TitleBarMaxButton \row \o titlebar-menu-icon \o QStyle::SP_TitleBarMenuButton \row \o titlebar-minimize-icon \o QStyle::SP_TitleBarMinButton \row \o titlebar-normal-icon \o QStyle::SP_TitleBarNormalButton \row \o titlebar-shade-icon \o QStyle::SP_TitleBarShadeButton \row \o titlebar-unshade-icon \o QStyle::SP_TitleBarUnshadeButton \row \o trash-icon \o QStyle::SP_TrashIcon \row \o uparrow-icon \o QStyle::SP_ArrowUp \endtable \section1 List of Property Types The following table summarizes the syntax and meaning of the different property types. \table 100% \header \o Type \o Syntax \o Description \row \o \bold Alignment \target Alignment \o \{ \c top \BR | \c bottom \BR | \c left \BR | \c right \BR | \c center \}* \o Horizontal and/or vertical alignment. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 80 \row \o \bold Attachment \target Attachment \o \{ \c scroll \BR | \c fixed \}* \o Scroll or fixed attachment. \row \o \bold Background \target Background \o \{ \l{#Brush}{Brush} \BR | \l{#Url}{Url} \BR | \l{#Repeat}{Repeat} \BR | \l{#Alignment}{Alignment} \}* \o A sequence of \l{#Brush}{Brush}, \l{#Url}{Url}, \l{#Repeat}{Repeat}, and \l{#Alignment}{Alignment}. \row \o \bold Boolean \target Boolean \o 0 | 1 \o True (\c 1) or false (\c 0). Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 81 \row \o \bold Border \target Border \o \{ \l{#Border Style}{Border Style} \BR | \l{#Length}{Length} \BR | \l{#Brush}{Brush} \}* \o Shorthand border property. \row \o \bold{Border \target Border Image Image} \o \c none \BR | \l{Url} \l{Number}\{4\} \BR (\c stretch | \c repeat){0,2} \o A border image is an image that is composed of nine parts (top left, top center, top right, center left, center, center right, bottom left, bottom center, and bottom right). When a border of a certain size is required, the corner parts are used as is, and the top, right, bottom, and left parts are stretched or repeated to produce a border with the desired size. See the \l{http://www.w3.org/TR/css3-background/#the-border-image} {CSS3 Draft Specification} for details. \row \o \bold{Border \target Border Style Style} \o \c dashed \BR | \c dot-dash \BR | \c dot-dot-dash \BR | \c dotted \BR | \c double \BR | \c groove \BR | \c inset \BR | \c outset \BR | \c ridge \BR | \c solid \BR | \c none \o Specifies the pattern used to draw a border. See the \l{http://www.w3.org/TR/css3-background/#border-style} {CSS3 Draft Specification} for details. \row \o \bold{Box \target Box Colors Colors} \o \l{#Brush}{Brush}\{1,4\} \o One to four occurrences of \l{#Brush}{Brush}, specifying the top, right, bottom, and left edges of a box, respectively. If the left color is not specified, it is taken to be the same as the right color. If the bottom color is not specified, it is taken to be the same as the top color. If the right color is not specified, it is taken to be the same as the top color. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 82 \row \o \bold{Box \target Box Lengths Lengths} \o \l{#Length}{Length}\{1,4\} \o One to four occurrences of \l{#Length}{Length}, specifying the top, right, bottom, and left edges of a box, respectively. If the left length is not specified, it is taken to be the same as the right length. If the bottom length is not specified, is it taken to be the same as the top length. If the right length is not specified, it is taken to be the same as the top length. Examples: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 83 \row \o \bold Brush \target Brush \o \l{#Color}{Color} \BR | \l{Gradient} \BR | \l{PaletteRole} \o Specifies a Color or a Gradient or an entry in the Palette. \row \o \bold Color \target Color \o \tt{rgb(\e{r}, \e{g}, \e{b})} \BR | \tt{rgba(\e{r}, \e{g}, \e{b}, \e{a})} \BR | \tt{hsv(\e{h}, \e{s}, \e{v})} \BR | \tt{hsva(\e{h}, \e{s}, \e{v}, \e{a})} \BR | \tt{#\e{rrggbb}} \BR | \l{QColor::setNamedColor()}{Color Name} \BR \o Specifies a color as RGB (red, green, blue) or RGBA (red, green, blue, alpha) or HSV (hue, saturation, value) or HSVA (hue, saturation, value, alpha) or a named color. The \c rgb() or \c rgba() syntax can be used with integer values between 0 and 255, or with percentages. The value of s, v, and a in \c hsv() or \c hsva() must all be in the range 0-255; the value of h must be in the range 0-359. Examples: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 84 \note The RGB colors allowed are the same as those allowed with CSS 2.1, as listed \l{http://www.w3.org/TR/CSS21/syndata.html#color-units}{here}. \row \o \bold Font \target Font \o (\l{#Font Style}{Font Style} | \l{#Font Weight}{Font Weight}){0,2} \l{#Font Size}{Font Size} String \o Shorthand font property. \row \o \bold{Font \target Font Size Size} \o \l{Length} \o The size of a font. \row \o \bold{Font \target Font Style Style} \o \c normal \BR | \c italic \BR | \c oblique \o The style of a font. \row \o \bold{Font \target Font Weight Weight} \o \c normal \BR | \c bold \BR | \c 100 \BR | \c 200 \BR ... \BR | \c 900 \o The weight of a font. \row \o \bold Gradient \target Gradient \o \c qlineargradient \BR | \c qradialgradient \BR | \c qconicalgradient \o Specifies gradient fills. There are three types of gradient fills: \list \o \e{Linear} gradients interpolate colors between start and end points. \o \e{Radial} gradients interpolate colors between a focal point and end points on a circle surrounding it. \o \e{Conical} gradients interpolate colors around a center point. \endlist Gradients are specified in Object Bounding Mode. Imagine the box in which the gradient is rendered, to have its top left corner at (0, 0) and its bottom right corner at (1, 1). Gradient parameters are then specified as percentages from 0 to 1. These values are extrapolated to actual box coordinates at runtime. It is possible specify values that lie outside the bounding box (-0.6 or 1.8, for instance). \warning The stops have to appear sorted in ascending order. Examples: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 85 \row \o \bold Icon \target Icon \o (\l{#Url}{Url} (\c disabled | \c active | \c normal | \c selected)? (\c on | \c off)? )* \o A list of url, QIcon::Mode and QIcon::State. Example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 86 \row \o \bold Length \target Length \o \l{#Number}{Number} (\c px | \c pt | \c em | \c ex)? \o A number followed by a measurement unit. The CSS standard recommends that user agents must \l{http://www.w3.org/TR/CSS21/syndata.html#illegalvalues}{ignore} a declaration with an illegal value. In Qt, it is mandatory to specify measurement units. For compatibility with earlier versions of Qt, numbers without measurement units are treated as pixels in most contexts. The supported units are: \list \o \c px: pixels \o \c pt: the size of one point (i.e., 1/72 of an inch) \o \c em: the em width of the font (i.e., the width of 'M') \o \c ex: the ex width of the font (i.e., the height of 'x') \endlist \row \o \bold Number \target Number \o A decimal integer or a real number \o Examples: \c 0, \c 18, \c +127, \c -255, \c 12.34, \c -.5, \c 0009. \row \o \bold Origin \target Origin \o \c margin \BR | \c border \BR | \c padding \BR | \c content \o Indicates which of four rectangles to use. \list \o \c margin: The margin rectangle. The margin falls outside the border. \o \c border: The border rectangle. This is where any border is drawn. \o \c padding: The padding rectangle. Unlike the margins, padding is located inside the border. \o \c content: The content rectangle. This specifies where the actual contents go, excluding any padding, border, or margin. \endlist See also \l{The Box Model}. \row \o \bold PaletteRole \target PaletteRole \o \c alternate-base \BR | \c base \BR | \c bright-text \BR | \c button \BR | \c button-text \BR | \c dark \BR | \c highlight \BR | \c highlighted-text \BR | \c light \BR | \c link \BR | \c link-visited \BR | \c mid \BR | \c midlight \BR | \c shadow \BR | \c text \BR | \c window \BR | \c window-text \BR \o These values correspond the \l{QPalette::ColorRole}{Color roles} in the widget's QPalette. For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 87 \row \o \bold Radius \target Radius \o \l{#Length}{Length}\{1, 2\} \o One or two occurrences of \l{#Length}{Length}. If only one length is specified, it is used as the radius of the quarter circle defining the corner. If two lengths are specified, the first length is the horizontal radius of a quarter ellipse, whereas the second length is the vertical radius. \row \o \bold Repeat \target Repeat \o \c repeat-x \BR | \c repeat-y \BR | \c repeat \BR | \c no-repeat \o A value indicating the nature of repetition. \list \o \c repeat-x: Repeat horizontally. \o \c repeat-y: Repeat vertically. \o \c repeat: Repeat horizontally and vertically. \o \c no-repeat: Don't repeat. \endlist \row \o \bold Url \target Url \o \tt{url(\e{filename})} \o \tt{\e{filename}} is the name of a file on the local disk or stored using \l{the Qt Resource System}. Setting an image implicitly sets the width and height of the element. \endtable \section1 List of Pseudo-States The following pseudo-states are supported: \table 100% \header \o Pseudo-State \o Description \row \o \c :active \target active \o This state is set when the widget resides in an active window. \row \o \c :adjoins-item \target adjoins-item-ps \o This state is set when the \l{#branch-sub}{::branch} of a QTreeView is adjacent to an item. \row \o \c :alternate \target alternate-ps \o This state is set for every alternate row whe painting the row of a QAbstractItemView when QAbstractItemView::alternatingRowColors() is set to true. \row \o \c :bottom \target bottom-ps \o The item is positioned at the bottom. For example, a QTabBar that has its tabs positioned at the bottom. \row \o \c :checked \target checked-ps \o The item is checked. For example, the \l{QAbstractButton::checked}{checked} state of QAbstractButton. \row \o \c :closable \target closable-ps \o The items can be closed. For example, the QDockWidget has the QDockWidget::DockWidgetClosable feature turned on. \row \o \c :closed \target closed-ps \o The item is in the closed state. For example, an non-expanded item in a QTreeView \row \o \c :default \target default-ps \o The item is the default. For example, a \l{QPushButton::default}{default} QPushButton or a default action in a QMenu. \row \o \c :disabled \target disabled-ps \o The item is \l{QWidget::enabled}{disabled}. \row \o \c :editable \target editable-ps \o The QComboBox is editable. \row \o \c :edit-focus \target edit-focus-ps \o The item has edit focus (See QStyle::State_HasEditFocus). This state is available only for Qt Extended applications. \row \o \c :enabled \target enabled-ps \o The item is \l{QWidget::enabled}{enabled}. \row \o \c :exclusive \target exclusive-ps \o The item is part of an exclusive item group. For example, a menu item in a exclusive QActionGroup. \row \o \c :first \target first-ps \o The item is the first (in a list). For example, the first tab in a QTabBar. \row \o \c :flat \target flat-ps \o The item is flat. For example, a \l{QPushButton::flat}{flat} QPushButton. \row \o \c :floatable \target floatable-ps \o The items can be floated. For example, the QDockWidget has the QDockWidget::DockWidgetFloatable feature turned on. \row \o \c :focus \target focus-ps \o The item has \l{QWidget::hasFocus()}{input focus}. \row \o \c :has-children \target has-children-ps \o The item has children. For example, an item in a QTreeView that has child items. \row \o \c :has-siblings \target has-siblings-ps \o The item has siblings. For example, an item in a QTreeView that siblings. \row \o \c :horizontal \target horizontal-ps \o The item has horizontal orientation \row \o \c :hover \target hover-ps \o The mouse is hovering over the item. \row \o \c :indeterminate \target indeterminate-ps \o The item has indeterminate state. For example, a QCheckBox or QRadioButton is \l{Qt::PartiallyChecked}{partially checked}. \row \o \c :last \target last-ps \o The item is the last (in a list). For example, the last tab in a QTabBar. \row \o \c :left \target left-ps \o The item is positioned at the left. For example, a QTabBar that has its tabs positioned at the left. \row \o \c :maximized \target maximized-ps \o The item is maximized. For example, a maximized QMdiSubWindow. \row \o \c :middle \target middle-ps \o The item is in the middle (in a list). For example, a tab that is not in the beginning or the end in a QTabBar. \row \o \c :minimized \target minimized-ps \o The item is minimized. For example, a minimized QMdiSubWindow. \row \o \c :movable \target movable-ps \o The item can be moved around. For example, the QDockWidget has the QDockWidget::DockWidgetMovable feature turned on. \row \o \c :no-frame \target no-frame-ps \o The item has no frame. For example, a frameless QSpinBox or QLineEdit. \row \o \c :non-exclusive \target non-exclusive-ps \o The item is part of a non-exclusive item group. For example, a menu item in a non-exclusive QActionGroup. \row \o \c :off \target off-ps \o For items that can be toggled, this applies to items in the "off" state. \row \o \c :on \target on-ps \o For items that can be toggled, this applies to widgets in the "on" state. \row \o \c :only-one \target only-one-ps \o The item is the only one (in a list). For example, a lone tab in a QTabBar. \row \o \c :open \target open-ps \o The item is in the open state. For example, an expanded item in a QTreeView, or a QComboBox or QPushButton with an open menu. \row \o \c :next-selected \target next-selected-ps \o The next item (in a list) is selected. For example, the selected tab of a QTabBar is next to this item. \row \o \c :pressed \target pressed-ps \o The item is being pressed using the mouse. \row \o \c :previous-selected \target previous-selected-ps \o The previous item (in a list) is selected. For example, a tab in a QTabBar that is next to the selected tab. \row \o \c :read-only \target read-only-ps \o The item is marked read only or non-editable. For example, a read only QLineEdit or a non-editable QComboBox. \row \o \c :right \target right-ps \o The item is positioned at the right. For example, a QTabBar that has its tabs positioned at the right. \row \o \c :selected \target selected-ps \o The item is selected. For example, the selected tab in a QTabBar or the selected item in a QMenu. \row \o \c :top \target top-ps \o The item is positioned at the top. For example, a QTabBar that has its tabs positioned at the top. \row \o \c :unchecked \target unchecked-ps \o The item is \l{QAbstractButton::checked}{unchecked}. \row \o \c :vertical \target vertical-ps \o The item has vertical orientation. \row \o \c :window \target window-ps \o The widget is a window (i.e top level widget) \endtable \target subcontrols \section1 List of Sub-Controls The following subcontrols are available: \table 100% \header \o Sub-Control \o Description \row \o \c ::add-line \target add-line-sub \o The button to add a line of a QScrollBar. \row \o \c ::add-page \target add-page-sub \o The region between the handle (slider) and the \l{#add-line-sub}{add-line} of a QScrollBar. \row \o \c ::branch \target branch-sub \o The branch indicator of a QTreeView. \row \o \c ::chunk \target chunk-sub \o The progress chunk of a QProgressBar. \row \o \c ::close-button \target close-button-sub \o The close button of a QDockWidget or tabs of QTabBar \row \o \c ::corner \target corner-sub \o The corner between two scrollbars in a QAbstractScrollArea \row \o \c ::down-arrow \target down-arrow-sub \o The down arrow of a QComboBox, QHeaderView (sort indicator), QScrollBar or QSpinBox. \row \o \c ::down-button \target down-button-sub \o The down button of a QScrollBar or a QSpinBox. \row \o \c ::drop-down \target drop-down-sub \o The drop-down button of a QComboBox. \row \o \c ::float-button \target float-button-sub \o The float button of a QDockWidget \row \o \c ::groove \target groove-sub \o The groove of a QSlider. \row \o \c ::indicator \target indicator-sub \o The indicator of a QAbstractItemView, a QCheckBox, a QRadioButton, a checkable QMenu item or a checkable QGroupBox. \row \o \c ::handle \target handle-sub \o The handle (slider) of a QScrollBar, a QSplitter, or a QSlider. \row \o \c ::icon \target icon-sub \o The icon of a QAbstractItemView or a QMenu. \row \o \c ::item \target item-sub \o An item of a QAbstractItemView, a QMenuBar, a QMenu, or a QStatusBar. \row \o \c ::left-arrow \target left-arrow-sub \o The left arrow of a QScrollBar. \row \o \c ::left-corner \target left-corner-sub \o The left corner of a QTabWidget. For example, this control can be used to control position the left corner widget in a QTabWidget. \row \o \c ::menu-arrow \target menu-arrow-sub \o The arrow of a QToolButton with a menu. \row \o \c ::menu-button \target menu-button-sub \o The menu button of a QToolButton. \row \o \c ::menu-indicator \target menu-indicator-sub \o The menu indicator of a QPushButton. \row \o \c ::right-arrow \target right-arrow-sub \o The right arrow of a QMenu or a QScrollBar. \row \o \c ::pane \target pane-sub \o The pane (frame) of a QTabWidget. \row \o \c ::right-corner \target right-corner-sub \o The right corner of a QTabWidget. For example, this control can be used to control the position the right corner widget in a QTabWidget. \row \o \c ::scroller \target scroller-sub \o The scroller of a QMenu or QTabBar. \row \o \c ::section \target section-sub \o The section of a QHeaderView. \row \o \c ::separator \target separator-sub \o The separator of a QMenu or in a QMainWindow. \row \o \c ::sub-line \target sub-line-sub \o The button to subtract a line of a QScrollBar. \row \o \c ::sub-page \target sub-page-sub \o The region between the handle (slider) and the \l{#sub-line-sub}{sub-line} of a QScrollBar. \row \o \c ::tab \target tab-sub \o The tab of a QTabBar or QToolBox. \row \o \c ::tab-bar \target tab-bar-sub \o The tab bar of a QTabWidget. This subcontrol exists only to control the position of the QTabBar inside the QTabWidget. To style the tabs using the \l{#tab-sub}{::tab} subcontrol. \row \o \c ::tear \target tear-sub \o The tear indicator of a QTabBar. \row \o \c ::tearoff \target tearoff-sub \o The tear-off indicator of a QMenu. \row \o \c ::text \target text-ps \o The text of a QAbstractItemView. \row \o \c ::title \target title-sub \o The title of a QGroupBox or a QDockWidget. \row \o \c ::up-arrow \target up-arrow-sub \o The up arrow of a QHeaderView (sort indicator), QScrollBar or a QSpinBox. \row \o \c ::up-button \target up-button-sub \o The up button of a QSpinBox. \endtable See \l{Customizing the QPushButton's Menu Indicator Sub-Control} for an example of how to customize a subcontrol. */ /*! \page stylesheet-examples.html \contentspage {Qt Style Sheet}{Contents} \previouspage Qt Style Sheets Reference \title Qt Style Sheets Examples We will now see a few examples to get started with using Qt Style Sheets. \tableofcontents \section1 Style Sheet Usage \section2 Customizing the Foreground and Background Colors Let's start by setting yellow as the background color of all \l{QLineEdit}s in an application. This could be achieved like this: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 88 If we want the property to apply only to the \l{QLineEdit}s that are children (or grandchildren or grand-grandchildren) of a specific dialog, we would rather do this: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 89 If we want the property to apply only to one specific QLineEdit, we can give it a name using QObject::setObjectName() and use an ID Selector to refer to it: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 90 Alternatively, we can set the \l{Qt Style Sheets Reference#background-prop}{background-color} property directly on the QLineEdit, omitting the selector: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 91 To ensure a good contrast, we should also specify a suitable color for the text: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 92 It might be a good idea to change the colors used for selected text as well: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 93 \section2 Customizing Using Dynamic Properties There are many situations where we need to present a form that has mandatory fields. To indicate to the user that the field is mandatory, one effective (albeit esthetically dubious) solution is to use yellow as the background color for those fields. It turns out this is very easy to implement using Qt Style Sheets. First, we would use the following application-wide style sheet: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 94 This means that every widget whose \c mandatoryField Qt property is set to true would have a yellow background. Then, for each mandatory field widget, we would simply create a \c mandatoryField property on the fly and set it to true. For example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 95 \section2 Customizing a QPushButton Using the Box Model This time, we will show how to create a red QPushButton. This QPushButton would presumably be connected to a very destructive piece of code. First, we are tempted to use this style sheet: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 96 However, the result is a boring, flat button with no borders: \image stylesheet-redbutton1.png A flat red button What happened is this: \list \o We have made a request that cannot be satisfied using the native styles alone (e.g., the Windows XP theme engine doesn't let us specify the background color of a button). \o Therefore, the button is rendered using style sheets. \o We haven't specified any values for \l{Qt Style Sheets Reference#border-width-prop}{border-width} and \l{Qt Style Sheets Reference#border-style-prop}{border-style}, so by default we obtain a 0-pixel wide border of style \c none. \endlist Let's improve the situation by specifying a border: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 97 \image stylesheet-redbutton2.png A red button with a beige border Things look already a lot better. But the button looks a bit cramped. Let's specify some spacing between the border and the text using the \l{Qt Style Sheets Reference#padding-prop}{padding}. Additionally, we will enforce a minimum width, round the corners, and specify a larger font to make the button look nicer: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 98 \image stylesheet-redbutton3.png A red button with a round beige border and big, bold text The only issue remaining is that the button doesn't react when we press it. We can fix this by specifying a slightly different background color and use a different border style. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 99 \section2 Customizing the QPushButton's Menu Indicator Sub-Control Subcontrols give access to the sub-elements of a widget. For example, a QPushButton associated with a menu (using QPushButton::setMenu()) has a menu indicator. Let's customize the menu indicator for the red push button: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 100 By default, the menu indicator is located at the bottom-right corner of the padding rectangle. We can change this by specifying \l{Qt Style Sheets Reference#subcontrol-position-prop}{subcontrol-position} and \l{Qt Style Sheets Reference#subcontrol-origin-prop}{subcontrol-origin} to anchor the indicator differently. We can also use \l{Qt Style Sheets Reference#top-prop}{top} and \l{Qt Style Sheets Reference#left-prop}{left} to move the indicator by a few pixels. For example: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 101 This positions the \c myindicator.png to the center right of the QPushButton's \l{Qt Style Sheets Reference#padding-prop}{padding} rectangle (see \l{Qt Style Sheets Reference#subcontrol-origin-prop}{subcontrol-origin} for more information). \section2 Complex Selector Example Since red seems to be our favorite color, let's make the text in QLineEdit red by setting the following application-wide stylesheet: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 102 However, we would like to give a visual indication that a QLineEdit is read-only by making it appear gray: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 103 At some point, our design team comes with the requirement that all \l{QLineEdit}s in the registration form (with the \l{QObject::objectName}{object name} \c registrationDialog) to be brown: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 104 A few UI design meetings later, we decide that all our \l{QDialog}s should have brown colored \l{QLineEdit}s: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 105 Quiz: What happens if we have a read-only QLineEdit in a QDialog? [Hint: The \l{The Style Sheet Syntax#Conflict Resolution}{Conflict Resolution} section above explains what happens in cases like this.] \section1 Customizing specific widgets This section provides examples to customize specific widgets using Style Sheets. \section2 Customizing QAbstractScrollArea The background of any QAbstractScrollArea (Item views, QTextEdit and QTextBrowser) can be set using the background properties. For example, to set a background-image that scrolls with the scroll bar: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 106 If the background-image is to be fixed with the viewport: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 107 \section2 Customizing QCheckBox Styling of a QCheckBox is almost indentical to styling a QRadioButton. The main difference is that a tristate QCheckBox has an indeterminate state. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 108 \section2 Customizing QComboBox We will look at an example where the drop down button of a QComboBox appears "merged" with the combo box frame. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 109 The pop-up of the QComboBox is a QAbstractItemView and is styled using the descendant selector: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 110 \section2 Customizing QDockWidget The title bar and the buttons of a QDockWidget can be customized as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 111 If one desires to move the dock widget buttons to the left, the following style sheet can be used: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 112 \note To customize the separator (resize handle) of a QDockWidget, use QMainWindow::separator. \section2 Customizing QFrame A QFrame is styled using the \l{The Box Model}. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 113 \section2 Customizing QGroupBox Let us look at an example that moves the QGroupBox's title to the center. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 114 For a checkable QGroupBox, use the \{#indicator-sub}{::indicator} subcontrol and style it exactly like a QCheckBox (i.e) \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 115 \section2 Customizing QHeaderView QHeaderView is customized as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 116 \section2 Customizing QLineEdit The frame of a QLineEdit is styled using the \l{The Box Model}. To create a line edit with rounded corners, we can set: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 117 The password character of line edits that have QLineEdit::Password echo mode can be set using: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 118 The background of a read only QLineEdit can be modified as below: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 119 \section2 Customizing QListView The background color of alternating rows can be customized using the following style sheet: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 120 To provide a special background when you hover over items, we can use the \l{item-sub}{::item} subcontrol. For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 121 \section2 Customizing QMainWindow The separator of a QMainWindow can be styled as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 122 \section2 Customizing QMenu Individual items of a QMenu are styled using the 'item' subcontrol as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 123 For a more advanced customization, use a style sheet as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 124 \section2 Customizing QMenuBar QMenuBar is styled as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 125 \section2 Customizing QProgressBar The QProgressBar's \l{stylesheet-reference.html#border-prop}{border}, \l{stylesheet-reference.html#chunk-sub}{chunk}, and \l{stylesheet-reference.html#text-align-prop}{text-align} can be customized using style sheets. However, if one property or sub-control is customized, all the other properties or sub-controls must be customized as well. \image progressBar-stylesheet.png For example, we change the \l{stylesheet-reference.html#border-prop} {border} to grey and the \l{stylesheet-reference.html#chunk-sub}{chunk} to cerulean. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 126 This leaves the \l{stylesheet-reference.html#text-align-prop} {text-align}, which we customize by positioning the text in the center of the progress bar. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 127 A \l{stylesheet-reference.html#margin-prop}{margin} can be included to obtain more visible chunks. \image progressBar2-stylesheet.png In the screenshot above, we use a \l{stylesheet-reference.html#margin-prop}{margin} of 0.5 pixels. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 128 \section2 Customizing QPushButton A QPushButton is styled as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 129 For a QPushButton with a menu, use the \l{Qt Style Sheets Reference#menu-indicator-sub}{::menu-indicator} subcontrol. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 130 Checkable QPushButton have the \l{Qt Style Sheets Reference#checked-ps} {:checked} pseudo state set. \section2 Customizing QRadioButton The indicator of a QRadioButton can be changed using: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 131 \section2 Customizing QScrollBar The QScrollBar can be styled using its subcontrols like \l{stylesheet-reference.html#handle-sub}{handle}, \l{stylesheet-reference.html#add-line-sub}{add-line}, \l{stylesheet-reference.html#sub-line-sub}{sub-line}, and so on. Note that if one property or sub-control is customized, all the other properties or sub-controls must be customized as well. \image stylesheet-scrollbar1.png The scroll bar above has been styled in aquamarine with a solid grey border. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 132 \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 133 \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 134 The \l{stylesheet-reference.html#left-arrow-sub}{left-arrow} and \l{stylesheet-reference.html#right-arrow-sub}{right-arrow} have a solid grey border with a white background. As an alternative, you could also embed the image of an arrow. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 135 If you want the scroll buttons of the scroll bar to be placed together (instead of the edges) like on Mac OS X, you can use the following stylesheet: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 136 The scroll bar using the above stylesheet looks like this: \image stylesheet-scrollbar2.png To customize a vertical scroll bar use a style sheet similar to the following: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 137 \section2 Customizing QSizeGrip QSizeGrip is usually styled by just setting an image. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 138 \section2 Customizing QSlider You can style horizontal slider as below: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 139 If you want to change the color of the slider parts before and after the handle, you can use the add-page and sub-page subcontrols. For example, for a vertical slider: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 140 \section2 Customizing QSpinBox QSpinBox can be completely customized as below (the style sheet has commentary inline): \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 141 \section2 Customizing QSplitter A QSplitter derives from a QFrame and hence can be styled like a QFrame. The grip or the handle is customized using the \l{Qt Style Sheets Reference#handle-sub}{::handle} subcontrol. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 142 \section2 Customizing QStatusBar We can provide a background for the status bar and a border for items inside the status bar as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 143 Note that widgets that have been added to the QStatusBar can be styled using the descendant declaration (i.e) \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 144 \section2 Customizing QTabWidget and QTabBar \image tabWidget-stylesheet1.png For the screenshot above, we need a stylesheet as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 145 Often we require the tabs to overlap to look like below: \image tabWidget-stylesheet2.png For a tab widget that looks like above, we make use of \l{http://www.communitymx.com/content/article.cfm?cid=B0029} {negative margins}. The resulting stylesheet looks like this: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 146 To move the tab bar to the center (as below), we require the following stylesheet: \image tabWidget-stylesheet3.png \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 147 The tear indicator and the scroll buttons can be further customized as follows: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 148 Since Qt 4.6 the close button can be customized as follow: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 159 \section2 Customizing QTableView Suppose we'd like our selected item in QTableView to have bubblegum pink fade to white as its background. \image tableWidget-stylesheet.png This is possible with the \l{stylesheet-reference.html#selection-background-color-prop} {selection-background-color} property and the syntax required is: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 149 The corner widget can be customized using the following style sheet \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 150 \section2 Customizing QToolBar The background and the handle of a QToolBar is customized as below: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 151 \section2 Customizing QToolBox The tabs of the QToolBox are customized using the 'tab' subcontrol. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 152 \section2 Customizing QToolButton There are three types of QToolButtons. \list \i The QToolButton has no menu. In this case, the QToolButton is styled exactly like QPushButton. See \l{#Customizing QPushButton}{Customizing QPushButton} for an example. \i The QToolButton has a menu and has the QToolButton::popupMode set to QToolButton::DelayedPopup or QToolButton::InstantPopup. In this case, the QToolButton is styled exactly like a QPushButton with a menu. See \l{#Customizing QPushButton}{Customizing QPushButton} for an example of the usage of the menu-indicator pseudo state. \i The QToolButton has its QToolButton::popupMode set to QToolButton::MenuButtonPopup. In this case, we style it as follows: \endlist \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 153 \section2 Customizing QToolTip QToolTip is customized exactly like a QLabel. In addition, for platforms that support it, the opacity property may be set to adjust the opacity. For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 154 \section2 Customizing QTreeView The background color of alternating rows can be customized using the following style sheet: \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 155 To provide a special background when you hover over items, we can use the \l{item-sub}{::item} subcontrol. For example, \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 156 The branches of a QTreeView are styled using the \l{Qt Style Sheets Reference#branch-sub}{::branch} subcontrol. The following stylesheet color codes the various states when drawing a branch. \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 157 Colorful, though it is, a more useful example can be made using the following images: \table \row \o \inlineimage stylesheet-vline.png \o \inlineimage stylesheet-branch-more.png \o \inlineimage stylesheet-branch-end.png \o \inlineimage stylesheet-branch-closed.png \o \inlineimage stylesheet-branch-open.png \row \o vline.png \o branch-more.png \o branch-end.png \o branch-closed.png \o branch-open.png \endtable \snippet doc/src/snippets/code/doc_src_stylesheet.qdoc 158 The resulting tree view looks like this: \image stylesheet-treeview.png \sa {Style Sheet Example}, {Supported HTML Subset}, QStyle \section1 Common mistakes This section lists some common mistakes when using stylesheets. \section2 QPushButton and images When styling a QPushButton, it is often desirable to use an image as the button graphic. It is common to try the \l{Qt Style Sheets Reference#background-image-prop}{background-image} property, but this has a number of drawbacks: For instance, the background will often appear hidden behind the button decoration, because it is not considered a background. In addition, if the button is resized, the entire background will be stretched or tiled, which does not always look good. It is better to use the \l{Qt Style Sheets Reference#border-image-prop}{border-image} property, as it will always display the image, regardless of the background (you can combine it with a background if it has alpha values in it), and it has special settings to deal with button resizing. Consider the following snippet: \snippet doc/src/snippets/stylesheet/common-mistakes.cpp 1 This will produce a button looking like this: \image stylesheet-border-image-normal.png The numbers after the url gives the top, right, bottom and left number of pixels, respectively. These numbers correspond to the border and should not stretch when the size changes. Whenever you resize the button, the middle part of the image will stretch in both directions, while the pixels specified in the stylesheet will not. This makes the borders of the button look more natural, like this: \table \row \o \inlineimage stylesheet-border-image-stretched.png \row \o With borders \endtable \table \row \o \inlineimage stylesheet-border-image-wrong.png \row \o Without borders \endtable */