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diff --git a/doc/src/qsizepolicy.qdoc b/doc/src/qsizepolicy.qdoc new file mode 100644 index 0000000..d82bb16 --- /dev/null +++ b/doc/src/qsizepolicy.qdoc @@ -0,0 +1,522 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \class QSizePolicy + \brief The QSizePolicy class is a layout attribute describing horizontal + and vertical resizing policy. + + \ingroup appearance + \ingroup geomanagement + + The size policy of a widget is an expression of its willingness to + be resized in various ways, and affects how the widget is treated + by the \l{Layout Management}{layout engine}. Each widget returns a + QSizePolicy that describes the horizontal and vertical resizing + policy it prefers when being laid out. You can change this for + a specific widget by changing its QWidget::sizePolicy property. + + QSizePolicy contains two independent QSizePolicy::Policy values + and two stretch factors; one describes the widgets's horizontal + size policy, and the other describes its vertical size policy. It + also contains a flag to indicate whether the height and width of + its preferred size are related. + + The horizontal and vertical policies can be set in the + constructor, and altered using the setHorizontalPolicy() and + setVerticalPolicy() functions. The stretch factors can be set + using the setHorizontalStretch() and setVerticalStretch() + functions. The flag indicating whether the widget's + \l{QWidget::sizeHint()}{sizeHint()} is width-dependent (such as a + menu bar or a word-wrapping label) can be set using the + setHeightForWidth() function. + + The current size policies and stretch factors be retrieved using + the horizontalPolicy(), verticalPolicy(), horizontalStretch() and + verticalStretch() functions. Alternatively, use the transpose() + function to swap the horizontal and vertical policies and + stretches. The hasHeightForWidth() function returns the current + status of the flag indicating the size hint dependencies. + + Use the expandingDirections() function to determine whether the + associated widget can make use of more space than its + \l{QWidget::sizeHint()}{sizeHint()} function indicates, as well as + find out in which directions it can expand. + + Finally, the QSizePolicy class provides operators comparing this + size policy to a given policy, as well as a QVariant operator + storing this QSizePolicy as a QVariant object. + + \sa QSize, QWidget::sizeHint(), QWidget::sizePolicy, + QLayoutItem::sizeHint() +*/ + +/*! + \enum QSizePolicy::PolicyFlag + + These flags are combined together to form the various \l{Policy} + values: + + \value GrowFlag The widget can grow beyond its size hint if necessary. + \value ExpandFlag The widget should get as much space as possible. + \value ShrinkFlag The widget can shrink below its size hint if necessary. + \value IgnoreFlag The widget's size hint is ignored. The widget will get + as much space as possible. + + \sa Policy +*/ + +/*! + \enum QSizePolicy::Policy + + This enum describes the various per-dimension sizing types used + when constructing a QSizePolicy. + + \value Fixed The QWidget::sizeHint() is the only acceptable + alternative, so the widget can never grow or shrink (e.g. the + vertical direction of a push button). + + \value Minimum The sizeHint() is minimal, and sufficient. The + widget can be expanded, but there is no advantage to it being + larger (e.g. the horizontal direction of a push button). + It cannot be smaller than the size provided by sizeHint(). + + \value Maximum The sizeHint() is a maximum. The widget can be + shrunk any amount without detriment if other widgets need the + space (e.g. a separator line). + It cannot be larger than the size provided by sizeHint(). + + \value Preferred The sizeHint() is best, but the widget can be + shrunk and still be useful. The widget can be expanded, but there + is no advantage to it being larger than sizeHint() (the default + QWidget policy). + + \value Expanding The sizeHint() is a sensible size, but the + widget can be shrunk and still be useful. The widget can make use + of extra space, so it should get as much space as possible (e.g. + the horizontal direction of a horizontal slider). + + \value MinimumExpanding The sizeHint() is minimal, and sufficient. + The widget can make use of extra space, so it should get as much + space as possible (e.g. the horizontal direction of a horizontal + slider). + + \value Ignored The sizeHint() is ignored. The widget will get as + much space as possible. + + \sa PolicyFlag, setHorizontalPolicy(), setVerticalPolicy() +*/ + +/*! + \fn QSizePolicy::QSizePolicy() + + Constructs a QSizePolicy object with \l Fixed as its horizontal + and vertical policies. + + The policies can be altered using the setHorizontalPolicy() and + setVerticalPolicy() functions. Use the setHeightForWidth() + function if the preferred height of the widget is dependent on the + width of the widget (for example, a QLabel with line wrapping). + + \sa setHorizontalStretch(), setVerticalStretch() +*/ + +/*! + \fn QSizePolicy::QSizePolicy(Policy horizontal, Policy vertical) + + Constructs a QSizePolicy object with the given \a horizontal and + \a vertical policies, and DefaultType as the control type. + + Use setHeightForWidth() if the preferred height of the widget is + dependent on the width of the widget (for example, a QLabel with + line wrapping). + + \sa setHorizontalStretch(), setVerticalStretch() +*/ + +/*! + \fn QSizePolicy::QSizePolicy(Policy horizontal, Policy vertical, ControlType type) + \since 4.3 + + Constructs a QSizePolicy object with the given \a horizontal and + \a vertical policies, and the specified control \a type. + + Use setHeightForWidth() if the preferred height of the widget is + dependent on the width of the widget (for example, a QLabel with + line wrapping). + + \sa setHorizontalStretch(), setVerticalStretch(), controlType() +*/ + +/*! + \fn QSizePolicy::Policy QSizePolicy::horizontalPolicy() const + + Returns the horizontal component of the size policy. + + \sa setHorizontalPolicy(), verticalPolicy(), horizontalStretch() +*/ + +/*! + \fn QSizePolicy::Policy QSizePolicy::verticalPolicy() const + + Returns the vertical component of the size policy. + + \sa setVerticalPolicy(), horizontalPolicy(), verticalStretch() +*/ + +/*! + \fn void QSizePolicy::setHorizontalPolicy(Policy policy) + + Sets the horizontal component to the given \a policy. + + \sa horizontalPolicy(), setVerticalPolicy(), setHorizontalStretch() +*/ + +/*! + \fn void QSizePolicy::setVerticalPolicy(Policy policy) + + Sets the vertical component to the given \a policy. + + \sa verticalPolicy(), setHorizontalPolicy(), setVerticalStretch() +*/ + +/*! + \fn Qt::Orientations QSizePolicy::expandingDirections() const + + Returns whether a widget can make use of more space than the + QWidget::sizeHint() function indicates. + + A value of Qt::Horizontal or Qt::Vertical means that the widget + can grow horizontally or vertically (i.e., the horizontal or + vertical policy is \l Expanding or \l MinimumExpanding), whereas + Qt::Horizontal | Qt::Vertical means that it can grow in both + dimensions. + + \sa horizontalPolicy(), verticalPolicy() +*/ + +/*! + \fn ControlType QSizePolicy::controlType() const + \since 4.3 + + Returns the control type associated with the widget for which + this size policy applies. +*/ + +/*! + \fn void QSizePolicy::setControlType(ControlType type) + \since 4.3 + + Sets the control type associated with the widget for which this + size policy applies to \a type. + + The control type specifies the type of the widget for which this + size policy applies. It is used by some styles, notably + QMacStyle, to insert proper spacing between widgets. For example, + the Mac OS X Aqua guidelines specify that push buttons should be + separated by 12 pixels, whereas vertically stacked radio buttons + only require 6 pixels. + + \sa QStyle::layoutSpacing() +*/ + +/*! + \fn void QSizePolicy::setHeightForWidth(bool dependent) + + Sets the flag determining whether the widget's preferred height + depends on its width, to \a dependent. + + \sa hasHeightForWidth() +*/ + +/*! + \fn bool QSizePolicy::hasHeightForWidth() const + + Returns true if the widget's preferred height depends on its + width; otherwise returns false. + + \sa setHeightForWidth() +*/ + +/*! + \fn bool QSizePolicy::operator==(const QSizePolicy &other) const + + Returns true if this policy is equal to \a other; otherwise + returns false. + + \sa operator!=() +*/ + +/*! + \fn bool QSizePolicy::operator!=(const QSizePolicy &other) const + + Returns true if this policy is different from \a other; otherwise + returns false. + + \sa operator==() +*/ + +/*! + \fn int QSizePolicy::horizontalStretch() const + + Returns the horizontal stretch factor of the size policy. + + \sa setHorizontalStretch(), verticalStretch(), horizontalPolicy() +*/ + +/*! + \fn int QSizePolicy::verticalStretch() const + + Returns the vertical stretch factor of the size policy. + + \sa setVerticalStretch(), horizontalStretch(), verticalPolicy() +*/ + +/*! + \fn void QSizePolicy::setHorizontalStretch(uchar stretchFactor) + + Sets the horizontal stretch factor of the size policy to the given \a + stretchFactor. + + \sa horizontalStretch(), setVerticalStretch(), setHorizontalPolicy() +*/ + +/*! + \fn void QSizePolicy::setVerticalStretch(uchar stretchFactor) + + Sets the vertical stretch factor of the size policy to the given + \a stretchFactor. + + \sa verticalStretch(), setHorizontalStretch(), setVerticalPolicy() +*/ + +/*! + \fn void QSizePolicy::transpose() + + Swaps the horizontal and vertical policies and stretches. +*/ + +/*! + \enum QSizePolicy::ControlType + \since 4.3 + + This enum specifies the different types of widgets in terms of + layout interaction: + + \value DefaultType The default type, when none is specified. + \value ButtonBox A QDialogButtonBox instance. + \value CheckBox A QCheckBox instance. + \value ComboBox A QComboBox instance. + \value Frame A QFrame instance. + \value GroupBox A QGroupBox instance. + \value Label A QLabel instance. + \value Line A QFrame instance with QFrame::HLine or QFrame::VLine. + \value LineEdit A QLineEdit instance. + \value PushButton A QPushButton instance. + \value RadioButton A QRadioButton instance. + \value Slider A QAbstractSlider instance. + \value SpinBox A QAbstractSpinBox instance. + \value TabWidget A QTabWidget instance. + \value ToolButton A QToolButton instance. + + \sa setControlType(), controlType() +*/ + +#ifdef QT3_SUPPORT +/*! + \typedef QSizePolicy::SizeType + \compat + + Use the QSizePolicy::Policy enum instead. +*/ + +/*! + \enum QSizePolicy::ExpandData + \compat + + Use the Qt::Orientations enum instead. + + \value NoDirection Use 0 instead. + \value Horizontally Use Qt::Horizontal instead. + \value Vertically Use Qt::Vertical instead. + \value BothDirections Use Qt::Horizontal | Qt::Vertical instead. +*/ + +/*! + \fn bool QSizePolicy::mayShrinkHorizontally() const + + Use the horizontalPolicy() function combined with the + QSizePolicy::PolicyFlag enum instead. + + \oldcode + bool policy = mayShrinkHorizontally(); + \newcode + bool policy = horizontalPolicy() & QSizePolicy::ShrinkFlag; + \endcode +*/ + +/*! + \fn bool QSizePolicy::mayShrinkVertically() const + + Use the verticalPolicy() function combined with the + QSizePolicy::PolicyFlag enum instead. + + \oldcode + bool policy = mayShrinkVertically(); + \newcode + bool policy = verticalPolicy() & QSizePolicy::ShrinkFlag; + \endcode +*/ + +/*! + \fn bool QSizePolicy::mayGrowHorizontally() const + + Use the horizontalPolicy() function combined with the + QSizePolicy::PolicyFlag enum instead. + + \oldcode + bool policy = mayGrowHorizontally(); + \newcode + bool policy = horizontalPolicy() & QSizePolicy::GrowFlag; + \endcode +*/ + +/*! + \fn bool QSizePolicy::mayGrowVertically() const + + Use the verticalPolicy() function combined with the + QSizePolicy::PolicyFlag enum instead. + + \oldcode + bool policy = mayGrowVertically(); + \newcode + bool policy = verticalPolicy() & QSizePolicy::GrowFlag; + \endcode +*/ + +/*! + \fn Qt::QSizePolicy::Orientations QSizePolicy::expanding() const + + Use expandingDirections() instead. +*/ + +/*! + \fn QSizePolicy::QSizePolicy(Policy horizontal, Policy vertical, bool dependent) + + Use the QSizePolicy() constructor and the setHeightForWidth() + function instead. + + \oldcode + QSizePolicy *policy = new QSizePolicy(horizontal, vertical, dependent); + \newcode + QSizePolicy *policy = new QSizePolicy(horizontal, vertical); + policy->setHeightForWidth(dependent); + \endcode +*/ + +/*! + \fn QSizePolicy::QSizePolicy(Policy horizontal, Policy vertical, uchar horizontalStretch, + uchar verticalStretch, bool dependent) + + Use the QSizePolicy() constructor and call the + setHorizontalStretch(), setVerticalStretch(), and + setHeightForWidth() functions instead. + + \oldcode + QSizePolicy *policy = new QSizePolicy(horizontal, vertical, + horizontalStretch, verticalStretch, + dependent); + \newcode + QSizePolicy *policy = new QSizePolicy(horizontal, vertical); + policy->setHorizontalStretch(horizontalStretch); + policy->setVerticalStretch(verticalStretch); + policy->setHeightForWidth(dependent); + \endcode +*/ + +/*! + \fn QSizePolicy::Policy QSizePolicy::horData() const + + Use horizontalPolicy() instead. +*/ + +/*! + \fn QSizePolicy::Policy QSizePolicy::verData() const + + Use verticalPolicy() instead. +*/ + +/*! + \fn void QSizePolicy::setHorData(Policy policy) + + Use setHorizontalPolicy() instead. +*/ + +/*! + \fn void QSizePolicy::setVerData(Policy policy) + + Use setVerticalPolicy() instead. +*/ + +/*! + \fn uint QSizePolicy::horStretch() const + + Use horizontalStretch() instead. +*/ + +/*! + \fn uint QSizePolicy::verStretch() const + + Use verticalStretch() instead. +*/ + +/*! + \fn void QSizePolicy::setHorStretch(uchar stretch) + + Use setHorizontalStretch() instead. +*/ + +/*! + \fn void QSizePolicy::setVerStretch(uchar stretch) + + Use setVerticalStretch() instead. +*/ +#endif |