/**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtDeclarative module 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 Technology Preview License Agreement accompanying ** this package. ** ** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "qmlview.h" #include #include "qmlgraphicsitem_p.h" #include "qmlgraphicsitem.h" #include #include QT_BEGIN_NAMESPACE #ifndef FLT_MAX #define FLT_MAX 1E+37 #endif QML_DEFINE_TYPE(Qt,4,6,Item,QmlGraphicsItem) QML_DEFINE_NOCREATE_TYPE(QGraphicsTransform); QML_DEFINE_TYPE(Qt,4,6,Scale,QGraphicsScale) QML_DEFINE_TYPE(Qt,4,6,Rotation,QGraphicsRotation) #include "qmlgraphicseffects.cpp" /*! \qmlclass Transform QGraphicsTransform \brief The Transform elements provide a way of building advanced transformations on Items. The Transform elements let you create and control advanced transformations that can be configured independently using specialized properties. You can assign any number of Transform elements to an Item. Each Transform is applied in order, one at a time, to the Item it's assigned to. \sa Rotation, Scale */ /*! \qmlclass Scale QGraphicsScale \brief The Scale object provides a way to scale an Item. The Scale object gives more control over scaling than using Item's scale property. Specifically, it allows a different scale for the x and y axes, and allows the scale to be relative to an arbitrary point. The following example scales the X axis of the Rectangle, relative to its interior point 25, 25: \qml Rectangle { width: 100; height: 100 color: "blue" transform: Scale { origin.x: 25; origin.y: 25; xScale: 3} } \endqml */ /*! \qmlproperty real Scale::origin.x \qmlproperty real Scale::origin.y The point that the item is scaled from (i.e., the point that stays fixed relative to the parent as the rest of the item grows). By default the origin is 0, 0. */ /*! \qmlproperty real Scale::xScale The scaling factor for the X axis. */ /*! \qmlproperty real Scale::yScale The scaling factor for the Y axis. */ /*! \qmlclass Rotation QGraphicsRotation \brief The Rotation object provides a way to rotate an Item. The Rotation object gives more control over rotation than using Item's rotation property. Specifically, it allows (z axis) rotation to be relative to an arbitrary point. The following example rotates a Rectangle around its interior point 25, 25: \qml Rectangle { width: 100; height: 100 color: "blue" transform: Rotation { origin.x: 25; origin.y: 25; angle: 45} } \endqml Rotation also provides a way to specify 3D-like rotations for Items. For these types of rotations you must specify the axis to rotate around in addition to the origin point. The following example shows various 3D-like rotations applied to an \l Image. \snippet doc/src/snippets/declarative/rotation.qml 0 \image axisrotation.png */ /*! \qmlproperty real Rotation::origin.x \qmlproperty real Rotation::origin.y The origin point of the rotation (i.e., the point that stays fixed relative to the parent as the rest of the item rotates). By default the origin is 0, 0. */ /*! \qmlproperty real Rotation::axis.x \qmlproperty real Rotation::axis.y \qmlproperty real Rotation::axis.z The axis to rotate around. For simple (2D) rotation around a point, you do not need to specify an axis, as the default axis is the z axis (\c{ axis { x: 0; y: 0; z: 0 } }). For a typical 3D-like rotation you will usually specify both the origin and the axis. \image 3d-rotation-axis.png */ /*! \qmlproperty real Rotation::angle The angle to rotate, in degrees clockwise. */ /*! \group group_animation \title Animation */ /*! \group group_coreitems \title Basic Items */ /*! \group group_effects \title Effects */ /*! \group group_layouts \title Layouts */ /*! \group group_states \title States and Transitions */ /*! \group group_utility \title Utility */ /*! \group group_views \title Views */ /*! \group group_widgets \title Widgets */ /*! \internal \class QmlGraphicsContents \ingroup group_utility \brief The QmlGraphicsContents class gives access to the height and width of an item's contents. */ QmlGraphicsContents::QmlGraphicsContents() : m_x(0), m_y(0), m_width(0), m_height(0) { } /*! \qmlproperty real Item::childrenRect.x \qmlproperty real Item::childrenRect.y \qmlproperty real Item::childrenRect.width \qmlproperty real Item::childrenRect.height The childrenRect properties allow an item access to the geometry of its children. This property is useful if you have an item that needs to be sized to fit its children. */ QRectF QmlGraphicsContents::rectF() const { return QRectF(m_x, m_y, m_width, m_height); } //TODO: optimization: only check sender(), if there is one void QmlGraphicsContents::calcHeight() { qreal oldy = m_y; qreal oldheight = m_height; qreal top = FLT_MAX; qreal bottom = 0; QList children = m_item->childItems(); for (int i = 0; i < children.count(); ++i) { QmlGraphicsItem *child = qobject_cast(children.at(i)); if(!child)//### Should this be ignoring non-QmlGraphicsItem graphicsobjects? continue; qreal y = child->y(); if (y + child->height() > bottom) bottom = y + child->height(); if (y < top) top = y; } if (!children.isEmpty()) m_y = top; m_height = qMax(bottom - top, qreal(0.0)); if (m_height != oldheight || m_y != oldy) emit rectChanged(); } //TODO: optimization: only check sender(), if there is one void QmlGraphicsContents::calcWidth() { qreal oldx = m_x; qreal oldwidth = m_width; qreal left = FLT_MAX; qreal right = 0; QList children = m_item->childItems(); for (int i = 0; i < children.count(); ++i) { QmlGraphicsItem *child = qobject_cast(children.at(i)); if(!child)//### Should this be ignoring non-QmlGraphicsItem graphicsobjects? continue; qreal x = child->x(); if (x + child->width() > right) right = x + child->width(); if (x < left) left = x; } if (!children.isEmpty()) m_x = left; m_width = qMax(right - left, qreal(0.0)); if (m_width != oldwidth || m_x != oldx) emit rectChanged(); } void QmlGraphicsContents::setItem(QmlGraphicsItem *item) { m_item = item; QList children = m_item->childItems(); for (int i = 0; i < children.count(); ++i) { QmlGraphicsItem *child = qobject_cast(children.at(i)); if(!child)//### Should this be ignoring non-QmlGraphicsItem graphicsobjects? continue; connect(child, SIGNAL(heightChanged()), this, SLOT(calcHeight())); connect(child, SIGNAL(yChanged()), this, SLOT(calcHeight())); connect(child, SIGNAL(widthChanged()), this, SLOT(calcWidth())); connect(child, SIGNAL(xChanged()), this, SLOT(calcWidth())); connect(this, SIGNAL(rectChanged()), m_item, SIGNAL(childrenRectChanged())); } calcHeight(); calcWidth(); } /* Key filters can be installed on a QmlGraphicsItem, but not removed. Currently they are only used by attached objects (which are only destroyed on Item destruction), so this isn't a problem. If in future this becomes any form of public API, they will have to support removal too. */ class QmlGraphicsItemKeyFilter { public: QmlGraphicsItemKeyFilter(QmlGraphicsItem * = 0); virtual ~QmlGraphicsItemKeyFilter(); virtual void keyPressed(QKeyEvent *event); virtual void keyReleased(QKeyEvent *event); virtual void inputMethodEvent(QInputMethodEvent *event); virtual QVariant inputMethodQuery(Qt::InputMethodQuery query) const; virtual void componentComplete(); private: QmlGraphicsItemKeyFilter *m_next; }; QmlGraphicsItemKeyFilter::QmlGraphicsItemKeyFilter(QmlGraphicsItem *item) : m_next(0) { QmlGraphicsItemPrivate *p = item?static_cast(QGraphicsItemPrivate::get(item)):0; if (p) { m_next = p->keyHandler; p->keyHandler = this; } } QmlGraphicsItemKeyFilter::~QmlGraphicsItemKeyFilter() { } void QmlGraphicsItemKeyFilter::keyPressed(QKeyEvent *event) { if (m_next) m_next->keyPressed(event); } void QmlGraphicsItemKeyFilter::keyReleased(QKeyEvent *event) { if (m_next) m_next->keyReleased(event); } void QmlGraphicsItemKeyFilter::inputMethodEvent(QInputMethodEvent *event) { if (m_next) m_next->inputMethodEvent(event); } QVariant QmlGraphicsItemKeyFilter::inputMethodQuery(Qt::InputMethodQuery query) const { if (m_next) return m_next->inputMethodQuery(query); return QVariant(); } void QmlGraphicsItemKeyFilter::componentComplete() { if (m_next) m_next->componentComplete(); } /*! \qmlclass KeyNavigation \brief The KeyNavigation attached property supports key navigation by arrow keys. It is common in key-based UIs to use arrow keys to navigate between focussed items. The KeyNavigation property provides a convenient way of specifying which item will gain focus when an arrow key is pressed. The following example provides key navigation for a 2x2 grid of items. \code Grid { columns: 2 width: 100; height: 100 Rectangle { id: item1 focus: true width: 50; height: 50 color: focus ? "red" : "lightgray" KeyNavigation.right: item2 KeyNavigation.down: item3 } Rectangle { id: item2 width: 50; height: 50 color: focus ? "red" : "lightgray" KeyNavigation.left: item1 KeyNavigation.down: item4 } Rectangle { id: item3 width: 50; height: 50 color: focus ? "red" : "lightgray" KeyNavigation.right: item4 KeyNavigation.up: item1 } Rectangle { id: item4 width: 50; height: 50 color: focus ? "red" : "lightgray" KeyNavigation.left: item3 KeyNavigation.up: item2 } } \endcode KeyNavigation receives key events after the item it is attached to. If the item accepts an arrow key event, the KeyNavigation attached property will not receive an event for that key. If an item has been set for a direction and the KeyNavigation attached property receives the corresponding key press and release events, the events will be accepted by KeyNaviagtion and will not propagate any further. \sa {Keys}{Keys attached property} */ /*! \qmlproperty Item KeyNavigation::left \qmlproperty Item KeyNavigation::right \qmlproperty Item KeyNavigation::up \qmlproperty Item KeyNavigation::down These properties hold the item to assign focus to when Key_Left, Key_Right, Key_Up or Key_Down are pressed. */ class QmlGraphicsKeyNavigationAttachedPrivate : public QObjectPrivate { public: QmlGraphicsKeyNavigationAttachedPrivate() : QObjectPrivate(), left(0), right(0), up(0), down(0) {} QmlGraphicsItem *left; QmlGraphicsItem *right; QmlGraphicsItem *up; QmlGraphicsItem *down; }; class QmlGraphicsKeyNavigationAttached : public QObject, public QmlGraphicsItemKeyFilter { Q_OBJECT Q_DECLARE_PRIVATE(QmlGraphicsKeyNavigationAttached) Q_PROPERTY(QmlGraphicsItem *left READ left WRITE setLeft NOTIFY changed) Q_PROPERTY(QmlGraphicsItem *right READ right WRITE setRight NOTIFY changed) Q_PROPERTY(QmlGraphicsItem *up READ up WRITE setUp NOTIFY changed) Q_PROPERTY(QmlGraphicsItem *down READ down WRITE setDown NOTIFY changed) public: QmlGraphicsKeyNavigationAttached(QObject * = 0); QmlGraphicsItem *left() const; void setLeft(QmlGraphicsItem *); QmlGraphicsItem *right() const; void setRight(QmlGraphicsItem *); QmlGraphicsItem *up() const; void setUp(QmlGraphicsItem *); QmlGraphicsItem *down() const; void setDown(QmlGraphicsItem *); static QmlGraphicsKeyNavigationAttached *qmlAttachedProperties(QObject *); Q_SIGNALS: void changed(); private: virtual void keyPressed(QKeyEvent *event); virtual void keyReleased(QKeyEvent *event); }; QmlGraphicsKeyNavigationAttached::QmlGraphicsKeyNavigationAttached(QObject *parent) : QObject(*(new QmlGraphicsKeyNavigationAttachedPrivate), parent), QmlGraphicsItemKeyFilter(qobject_cast(parent)) { } QmlGraphicsKeyNavigationAttached * QmlGraphicsKeyNavigationAttached::qmlAttachedProperties(QObject *obj) { return new QmlGraphicsKeyNavigationAttached(obj); } QmlGraphicsItem *QmlGraphicsKeyNavigationAttached::left() const { Q_D(const QmlGraphicsKeyNavigationAttached); return d->left; } void QmlGraphicsKeyNavigationAttached::setLeft(QmlGraphicsItem *i) { Q_D(QmlGraphicsKeyNavigationAttached); d->left = i; emit changed(); } QmlGraphicsItem *QmlGraphicsKeyNavigationAttached::right() const { Q_D(const QmlGraphicsKeyNavigationAttached); return d->right; } void QmlGraphicsKeyNavigationAttached::setRight(QmlGraphicsItem *i) { Q_D(QmlGraphicsKeyNavigationAttached); d->right = i; emit changed(); } QmlGraphicsItem *QmlGraphicsKeyNavigationAttached::up() const { Q_D(const QmlGraphicsKeyNavigationAttached); return d->up; } void QmlGraphicsKeyNavigationAttached::setUp(QmlGraphicsItem *i) { Q_D(QmlGraphicsKeyNavigationAttached); d->up = i; emit changed(); } QmlGraphicsItem *QmlGraphicsKeyNavigationAttached::down() const { Q_D(const QmlGraphicsKeyNavigationAttached); return d->down; } void QmlGraphicsKeyNavigationAttached::setDown(QmlGraphicsItem *i) { Q_D(QmlGraphicsKeyNavigationAttached); d->down = i; emit changed(); } void QmlGraphicsKeyNavigationAttached::keyPressed(QKeyEvent *event) { Q_D(QmlGraphicsKeyNavigationAttached); event->ignore(); switch(event->key()) { case Qt::Key_Left: if (d->left) { d->left->setFocus(true); event->accept(); } break; case Qt::Key_Right: if (d->right) { d->right->setFocus(true); event->accept(); } break; case Qt::Key_Up: if (d->up) { d->up->setFocus(true); event->accept(); } break; case Qt::Key_Down: if (d->down) { d->down->setFocus(true); event->accept(); } break; default: break; } if (!event->isAccepted()) QmlGraphicsItemKeyFilter::keyPressed(event); } void QmlGraphicsKeyNavigationAttached::keyReleased(QKeyEvent *event) { Q_D(QmlGraphicsKeyNavigationAttached); event->ignore(); switch(event->key()) { case Qt::Key_Left: if (d->left) { event->accept(); } break; case Qt::Key_Right: if (d->right) { event->accept(); } break; case Qt::Key_Up: if (d->up) { event->accept(); } break; case Qt::Key_Down: if (d->down) { event->accept(); } break; default: break; } if (!event->isAccepted()) QmlGraphicsItemKeyFilter::keyReleased(event); } /*! \qmlclass Keys \brief The Keys attached property provides key handling to Items. All visual primitives support key handling via the \e Keys attached property. Keys can be handled via the \e onPressed and \e onReleased signal properties. The signal properties have a \l KeyEvent parameter, named \e event which contains details of the event. If a key is handled \e event.accepted should be set to true to prevent the event from propagating up the item heirarchy. \code Item { focus: true Keys.onPressed: { if (event.key == Qt.Key_Left) { print("move left"); event.accepted = true; } } } \endcode Some keys may alternatively be handled via specific signal properties, for example \e onSelectPressed. These handlers automatically set \e event.accepted to true. \code Item { focus: true Keys.onLeftPressed: print("move left") } \endcode See \l {Qt::Key}{Qt.Key} for the list of keyboard codes. \sa KeyEvent, {KeyNavigation}{KeyNavigation attached property} */ /*! \qmlproperty bool Keys::enabled This flags enables key handling if true (default); otherwise no key handlers will be called. */ /*! \qmlproperty List Keys::forwardTo This property provides a way to forward key presses, key releases, and keyboard input coming from input methods to other items. This can be useful when you want one item to handle some keys (e.g. the up and down arrow keys), and another item to handle other keys (e.g. the left and right arrow keys). Once an item that has been forwarded keys accepts the event it is no longer forwarded to items later in the list. This example forwards key events to two lists: \qml ListView { id: list1 ... } ListView { id: list2 ... } Keys.forwardTo: [list1, list2] focus: true \endqml */ /*! \qmlsignal Keys::onPressed(event) This handler is called when a key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onReleased(event) This handler is called when a key has been released. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit0Pressed(event) This handler is called when the digit '0' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit1Pressed(event) This handler is called when the digit '1' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit2Pressed(event) This handler is called when the digit '2' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit3Pressed(event) This handler is called when the digit '3' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit4Pressed(event) This handler is called when the digit '4' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit5Pressed(event) This handler is called when the digit '5' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit6Pressed(event) This handler is called when the digit '6' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit7Pressed(event) This handler is called when the digit '7' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit8Pressed(event) This handler is called when the digit '8' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDigit9Pressed(event) This handler is called when the digit '9' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onLeftPressed(event) This handler is called when the Left arrow has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onRightPressed(event) This handler is called when the Right arrow has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onUpPressed(event) This handler is called when the Up arrow has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDownPressed(event) This handler is called when the Down arrow has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onAsteriskPressed(event) This handler is called when the Asterisk '*' has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onEscapePressed(event) This handler is called when the Escape key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onReturnPressed(event) This handler is called when the Return key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onEnterPressed(event) This handler is called when the Enter key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onDeletePressed(event) This handler is called when the Delete key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onSpacePressed(event) This handler is called when the Space key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onBackPressed(event) This handler is called when the Back key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onCancelPressed(event) This handler is called when the Cancel key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onSelectPressed(event) This handler is called when the Select key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onYesPressed(event) This handler is called when the Yes key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onNoPressed(event) This handler is called when the No key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onContext1Pressed(event) This handler is called when the Context1 key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onContext2Pressed(event) This handler is called when the Context2 key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onContext3Pressed(event) This handler is called when the Context3 key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onContext4Pressed(event) This handler is called when the Context4 key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onCallPressed(event) This handler is called when the Call key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onHangupPressed(event) This handler is called when the Hangup key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onFlipPressed(event) This handler is called when the Flip key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onMenuPressed(event) This handler is called when the Menu key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onVolumeUpPressed(event) This handler is called when the VolumeUp key has been pressed. The \a event parameter provides information about the event. */ /*! \qmlsignal Keys::onVolumeDownPressed(event) This handler is called when the VolumeDown key has been pressed. The \a event parameter provides information about the event. */ class QmlGraphicsKeysAttachedPrivate : public QObjectPrivate { public: QmlGraphicsKeysAttachedPrivate() : QObjectPrivate(), inPress(false), inRelease(false) , inIM(false), enabled(true), imeItem(0), item(0) {} bool isConnected(const char *signalName); QGraphicsItem *finalFocusProxy(QGraphicsItem *item) const { QGraphicsItem *fp; while ((fp = item->focusProxy())) item = fp; return item; } //loop detection bool inPress:1; bool inRelease:1; bool inIM:1; bool enabled : 1; QGraphicsItem *imeItem; QList targets; QmlGraphicsItem *item; }; class QmlGraphicsKeysAttached : public QObject, public QmlGraphicsItemKeyFilter { Q_OBJECT Q_DECLARE_PRIVATE(QmlGraphicsKeysAttached) Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged) Q_PROPERTY(QList *forwardTo READ forwardTo) public: QmlGraphicsKeysAttached(QObject *parent=0); ~QmlGraphicsKeysAttached(); bool enabled() const { Q_D(const QmlGraphicsKeysAttached); return d->enabled; } void setEnabled(bool enabled) { Q_D(QmlGraphicsKeysAttached); if (enabled != d->enabled) { d->enabled = enabled; emit enabledChanged(); } } QList *forwardTo() { Q_D(QmlGraphicsKeysAttached); return &d->targets; } virtual void componentComplete(); static QmlGraphicsKeysAttached *qmlAttachedProperties(QObject *); Q_SIGNALS: void enabledChanged(); void pressed(QmlGraphicsKeyEvent *event); void released(QmlGraphicsKeyEvent *event); void digit0Pressed(QmlGraphicsKeyEvent *event); void digit1Pressed(QmlGraphicsKeyEvent *event); void digit2Pressed(QmlGraphicsKeyEvent *event); void digit3Pressed(QmlGraphicsKeyEvent *event); void digit4Pressed(QmlGraphicsKeyEvent *event); void digit5Pressed(QmlGraphicsKeyEvent *event); void digit6Pressed(QmlGraphicsKeyEvent *event); void digit7Pressed(QmlGraphicsKeyEvent *event); void digit8Pressed(QmlGraphicsKeyEvent *event); void digit9Pressed(QmlGraphicsKeyEvent *event); void leftPressed(QmlGraphicsKeyEvent *event); void rightPressed(QmlGraphicsKeyEvent *event); void upPressed(QmlGraphicsKeyEvent *event); void downPressed(QmlGraphicsKeyEvent *event); void asteriskPressed(QmlGraphicsKeyEvent *event); void numberSignPressed(QmlGraphicsKeyEvent *event); void escapePressed(QmlGraphicsKeyEvent *event); void returnPressed(QmlGraphicsKeyEvent *event); void enterPressed(QmlGraphicsKeyEvent *event); void deletePressed(QmlGraphicsKeyEvent *event); void spacePressed(QmlGraphicsKeyEvent *event); void backPressed(QmlGraphicsKeyEvent *event); void cancelPressed(QmlGraphicsKeyEvent *event); void selectPressed(QmlGraphicsKeyEvent *event); void yesPressed(QmlGraphicsKeyEvent *event); void noPressed(QmlGraphicsKeyEvent *event); void context1Pressed(QmlGraphicsKeyEvent *event); void context2Pressed(QmlGraphicsKeyEvent *event); void context3Pressed(QmlGraphicsKeyEvent *event); void context4Pressed(QmlGraphicsKeyEvent *event); void callPressed(QmlGraphicsKeyEvent *event); void hangupPressed(QmlGraphicsKeyEvent *event); void flipPressed(QmlGraphicsKeyEvent *event); void menuPressed(QmlGraphicsKeyEvent *event); void volumeUpPressed(QmlGraphicsKeyEvent *event); void volumeDownPressed(QmlGraphicsKeyEvent *event); private: virtual void keyPressed(QKeyEvent *event); virtual void keyReleased(QKeyEvent *event); virtual void inputMethodEvent(QInputMethodEvent *); virtual QVariant inputMethodQuery(Qt::InputMethodQuery query) const; const QByteArray keyToSignal(int key) { QByteArray keySignal; if (key >= Qt::Key_0 && key <= Qt::Key_9) { keySignal = "digit0Pressed"; keySignal[5] = '0' + (key - Qt::Key_0); } else { int i = 0; while (sigMap[i].key && sigMap[i].key != key) ++i; keySignal = sigMap[i].sig; } return keySignal; } struct SigMap { int key; const char *sig; }; static const SigMap sigMap[]; }; const QmlGraphicsKeysAttached::SigMap QmlGraphicsKeysAttached::sigMap[] = { { Qt::Key_Left, "leftPressed" }, { Qt::Key_Right, "rightPressed" }, { Qt::Key_Up, "upPressed" }, { Qt::Key_Down, "downPressed" }, { Qt::Key_Asterisk, "asteriskPressed" }, { Qt::Key_NumberSign, "numberSignPressed" }, { Qt::Key_Escape, "escapePressed" }, { Qt::Key_Return, "returnPressed" }, { Qt::Key_Enter, "enterPressed" }, { Qt::Key_Delete, "deletePressed" }, { Qt::Key_Space, "spacePressed" }, { Qt::Key_Back, "backPressed" }, { Qt::Key_Cancel, "cancelPressed" }, { Qt::Key_Select, "selectPressed" }, { Qt::Key_Yes, "yesPressed" }, { Qt::Key_No, "noPressed" }, { Qt::Key_Context1, "context1Pressed" }, { Qt::Key_Context2, "context2Pressed" }, { Qt::Key_Context3, "context3Pressed" }, { Qt::Key_Context4, "context4Pressed" }, { Qt::Key_Call, "callPressed" }, { Qt::Key_Hangup, "hangupPressed" }, { Qt::Key_Flip, "flipPressed" }, { Qt::Key_Menu, "menuPressed" }, { Qt::Key_VolumeUp, "volumeUpPressed" }, { Qt::Key_VolumeDown, "volumeDownPressed" }, { 0, 0 } }; bool QmlGraphicsKeysAttachedPrivate::isConnected(const char *signalName) { return isSignalConnected(signalIndex(signalName)); } QmlGraphicsKeysAttached::QmlGraphicsKeysAttached(QObject *parent) : QObject(*(new QmlGraphicsKeysAttachedPrivate), parent), QmlGraphicsItemKeyFilter(qobject_cast(parent)) { Q_D(QmlGraphicsKeysAttached); d->item = qobject_cast(parent); } QmlGraphicsKeysAttached::~QmlGraphicsKeysAttached() { } void QmlGraphicsKeysAttached::componentComplete() { Q_D(QmlGraphicsKeysAttached); if (d->item) { for (int ii = 0; ii < d->targets.count(); ++ii) { QGraphicsItem *targetItem = d->finalFocusProxy(d->targets.at(ii)); if (targetItem && (targetItem->flags() & QGraphicsItem::ItemAcceptsInputMethod)) { d->item->setFlag(QGraphicsItem::ItemAcceptsInputMethod); break; } } } } void QmlGraphicsKeysAttached::keyPressed(QKeyEvent *event) { Q_D(QmlGraphicsKeysAttached); if (!d->enabled || d->inPress) { event->ignore(); return; } // first process forwards if (d->item && d->item->scene()) { d->inPress = true; for (int ii = 0; ii < d->targets.count(); ++ii) { QGraphicsItem *i = d->finalFocusProxy(d->targets.at(ii)); if (i) { d->item->scene()->sendEvent(i, event); if (event->isAccepted()) { d->inPress = false; return; } } } d->inPress = false; } QmlGraphicsKeyEvent ke(*event); QByteArray keySignal = keyToSignal(event->key()); if (!keySignal.isEmpty()) { keySignal += "(QmlGraphicsKeyEvent*)"; if (d->isConnected(keySignal)) { // If we specifically handle a key then default to accepted ke.setAccepted(true); int idx = QmlGraphicsKeysAttached::staticMetaObject.indexOfSignal(keySignal); metaObject()->method(idx).invoke(this, Qt::DirectConnection, Q_ARG(QmlGraphicsKeyEvent*, &ke)); } } if (!ke.isAccepted()) emit pressed(&ke); event->setAccepted(ke.isAccepted()); if (!event->isAccepted()) QmlGraphicsItemKeyFilter::keyPressed(event); } void QmlGraphicsKeysAttached::keyReleased(QKeyEvent *event) { Q_D(QmlGraphicsKeysAttached); if (!d->enabled || d->inRelease) { event->ignore(); return; } if (d->item && d->item->scene()) { d->inRelease = true; for (int ii = 0; ii < d->targets.count(); ++ii) { QGraphicsItem *i = d->finalFocusProxy(d->targets.at(ii)); if (i) { d->item->scene()->sendEvent(i, event); if (event->isAccepted()) { d->inRelease = false; return; } } } d->inRelease = false; } QmlGraphicsKeyEvent ke(*event); emit released(&ke); event->setAccepted(ke.isAccepted()); if (!event->isAccepted()) QmlGraphicsItemKeyFilter::keyReleased(event); } void QmlGraphicsKeysAttached::inputMethodEvent(QInputMethodEvent *event) { Q_D(QmlGraphicsKeysAttached); if (d->item && !d->inIM && d->item->scene()) { d->inIM = true; for (int ii = 0; ii < d->targets.count(); ++ii) { QGraphicsItem *i = d->finalFocusProxy(d->targets.at(ii)); if (i && (i->flags() & QGraphicsItem::ItemAcceptsInputMethod)) { d->item->scene()->sendEvent(i, event); if (event->isAccepted()) { d->imeItem = i; d->inIM = false; return; } } } d->inIM = false; } if (!event->isAccepted()) QmlGraphicsItemKeyFilter::inputMethodEvent(event); } class QmlGraphicsItemAccessor : public QGraphicsItem { public: QVariant doInputMethodQuery(Qt::InputMethodQuery query) const { return QGraphicsItem::inputMethodQuery(query); } }; QVariant QmlGraphicsKeysAttached::inputMethodQuery(Qt::InputMethodQuery query) const { Q_D(const QmlGraphicsKeysAttached); if (d->item) { for (int ii = 0; ii < d->targets.count(); ++ii) { QGraphicsItem *i = d->finalFocusProxy(d->targets.at(ii)); if (i && (i->flags() & QGraphicsItem::ItemAcceptsInputMethod) && i == d->imeItem) { //### how robust is i == d->imeItem check? QVariant v = static_cast(i)->doInputMethodQuery(query); if (v.type() == QVariant::RectF) v = d->item->mapRectFromItem(i, v.toRectF()); //### cost? return v; } } } return QmlGraphicsItemKeyFilter::inputMethodQuery(query); } QmlGraphicsKeysAttached *QmlGraphicsKeysAttached::qmlAttachedProperties(QObject *obj) { return new QmlGraphicsKeysAttached(obj); } /*! \class QmlGraphicsItem \brief The QmlGraphicsItem class provides the most basic of all visual items in QML. All visual items in Qt Declarative inherit from QmlGraphicsItem. Although QmlGraphicsItem has no visual appearance, it defines all the properties that are common across visual items - such as the x and y position, the width and height, \l {anchor-layout}{anchoring} and key handling. You can subclass QmlGraphicsItem to provide your own custom visual item that inherits these features. */ /*! \qmlclass Item QmlGraphicsItem \brief The Item is the most basic of all visual items in QML. All visual items in Qt Declarative inherit from Item. Although Item has no visual appearance, it defines all the properties that are common across visual items - such as the x and y position, the width and height, \l {anchor-layout}{anchoring} and key handling. Item is also useful for grouping items together. \qml Item { Image { file: "tile.png" } Image { x: 80 width: 100 height: 100 file: "tile.png" } Image { x: 190 width: 100 height: 100 tile: true file: "tile.png" } } \endqml \section1 Key Handling Key handling is available to all Item-based visual elements via the \l {Keys}{Keys} attached property. The \e Keys attached property provides basic handlers such as \l {Keys::onPressed(event)}{onPressed} and \l {Keys::onReleased(event)}{onReleased}, as well as handlers for specific keys, such as \l {Keys::onCancelPressed(event)}{onCancelPressed}. The example below assigns \l {qmlfocus}{focus} to the item and handles the Left key via the general \e onPressed handler and the Select key via the onSelectPressed handler: \qml Item { focus: true Keys.onPressed: { if (event.key == Qt.Key_Left) { print("move left"); event.accepted = true; } } Keys.onSelectPressed: print("Selected"); } \endqml See the \l {Keys}{Keys} attached property for detailed documentation. \ingroup group_coreitems */ /*! \property QmlGraphicsItem::baseline \internal */ /*! \property QmlGraphicsItem::effect \internal */ /*! \property QmlGraphicsItem::focus \internal */ /*! \property QmlGraphicsItem::wantsFocus \internal */ /*! \property QmlGraphicsItem::transformOrigin \internal */ /*! \fn void QmlGraphicsItem::childrenRectChanged() \internal */ /*! \fn void QmlGraphicsItem::baselineOffsetChanged() \internal */ /*! \fn void QmlGraphicsItem::widthChanged() \internal */ /*! \fn void QmlGraphicsItem::heightChanged() \internal */ /*! \fn void QmlGraphicsItem::stateChanged(const QString &state) \internal */ /*! \fn void QmlGraphicsItem::parentChanged() \internal */ /*! \fn void QmlGraphicsItem::focusChanged() \internal */ /*! \fn void QmlGraphicsItem::wantsFocusChanged() \internal */ static inline void qfxitem_registerAnchorLine() { static bool registered = false; if (!registered) { qRegisterMetaType("QmlGraphicsAnchorLine"); registered = true; } } /*! \fn QmlGraphicsItem::QmlGraphicsItem(QmlGraphicsItem *parent) Constructs a QmlGraphicsItem with the given \a parent. */ QmlGraphicsItem::QmlGraphicsItem(QmlGraphicsItem* parent) : QGraphicsObject(*(new QmlGraphicsItemPrivate), parent, 0) { Q_D(QmlGraphicsItem); qfxitem_registerAnchorLine(); d->init(parent); } /*! \internal */ QmlGraphicsItem::QmlGraphicsItem(QmlGraphicsItemPrivate &dd, QmlGraphicsItem *parent) : QGraphicsObject(dd, parent, 0) { Q_D(QmlGraphicsItem); qfxitem_registerAnchorLine(); d->init(parent); } /*! Destroys the QmlGraphicsItem. */ QmlGraphicsItem::~QmlGraphicsItem() { Q_D(QmlGraphicsItem); for (int ii = 0; ii < d->dependantAnchors.count(); ++ii) { QmlGraphicsAnchors *anchor = d->dependantAnchors.at(ii); anchor->d_func()->clearItem(this); } if (!d->parent || (parentItem() && !parentItem()->QGraphicsItem::d_ptr->inDestructor)) for (int ii = 0; ii < d->dependantAnchors.count(); ++ii) { QmlGraphicsAnchors *anchor = d->dependantAnchors.at(ii); if (anchor->d_func()->item && anchor->d_func()->item->parentItem() != this) //child will be deleted anyway anchor->d_func()->updateOnComplete(); } d->dependantAnchors.clear(); delete d->_anchorLines; d->_anchorLines = 0; delete d->_anchors; d->_anchors = 0; } /*! \qmlproperty enum Item::transformOrigin This property holds the origin point around which scale and rotation transform. Nine transform origins are available, as shown in the image below. \image declarative-transformorigin.png This example scales an image about its center. \qml Image { source: "myimage.png" transformOrigin: Item.Center scale: 4 } \endqml The default transform origin is \c TopLeft. */ /*! \qmlproperty Item Item::parent This property holds the parent of the item. */ /*! \property QmlGraphicsItem::parent This property holds the parent of the item. */ void QmlGraphicsItem::setParentItem(QmlGraphicsItem *parent) { QmlGraphicsItem *oldParent = parentItem(); if (parent == oldParent || !parent) return; QObject::setParent(parent); QGraphicsObject::setParentItem(parent); } /*! Returns the QmlGraphicsItem parent of this item. */ QmlGraphicsItem *QmlGraphicsItem::parentItem() const { return qobject_cast(QGraphicsObject::parentItem()); } /*! \qmlproperty list Item::children \qmlproperty list Item::resources The children property contains the list of visual children of this item. The resources property contains non-visual resources that you want to reference by name. Generally you can rely on Item's default property to handle all this for you, but it can come in handy in some cases. \qml Item { children: [ Text {}, Rectangle {} ] resources: [ Component { id: myComponent Text {} } ] } \endqml */ /*! \property QmlGraphicsItem::children \internal */ /*! \property QmlGraphicsItem::resources \internal */ /*! Returns true if construction of the QML component is complete; otherwise returns false. It is often desireable to delay some processing until the component is completed. \sa componentComplete() */ bool QmlGraphicsItem::isComponentComplete() const { Q_D(const QmlGraphicsItem); return d->_componentComplete; } /*! \property QmlGraphicsItem::anchors \internal */ /*! \internal */ QmlGraphicsAnchors *QmlGraphicsItem::anchors() { Q_D(QmlGraphicsItem); return d->anchors(); } void QmlGraphicsItemPrivate::data_removeAt(int) { // ### } int QmlGraphicsItemPrivate::data_count() const { // ### return 0; } void QmlGraphicsItemPrivate::data_append(QObject *o) { Q_Q(QmlGraphicsItem); QmlGraphicsItem *i = qobject_cast(o); if (i) q->fxChildren()->append(i); else resources_append(o); } void QmlGraphicsItemPrivate::data_insert(int, QObject *) { // ### } QObject *QmlGraphicsItemPrivate::data_at(int) const { // ### return 0; } void QmlGraphicsItemPrivate::data_clear() { // ### } void QmlGraphicsItemPrivate::resources_removeAt(int) { // ### } int QmlGraphicsItemPrivate::resources_count() const { Q_Q(const QmlGraphicsItem); return q->children().count(); } void QmlGraphicsItemPrivate::resources_append(QObject *o) { Q_Q(QmlGraphicsItem); o->setParent(q); } void QmlGraphicsItemPrivate::resources_insert(int, QObject *) { // ### } QObject *QmlGraphicsItemPrivate::resources_at(int idx) const { Q_Q(const QmlGraphicsItem); QObjectList children = q->children(); if (idx < children.count()) return children.at(idx); else return 0; } void QmlGraphicsItemPrivate::resources_clear() { // ### } void QmlGraphicsItemPrivate::children_removeAt(int) { // ### } int QmlGraphicsItemPrivate::children_count() const { Q_Q(const QmlGraphicsItem); return q->childItems().count(); } void QmlGraphicsItemPrivate::children_append(QmlGraphicsItem *i) { Q_Q(QmlGraphicsItem); i->setParentItem(q); } void QmlGraphicsItemPrivate::children_insert(int, QmlGraphicsItem *) { // ### } QmlGraphicsItem *QmlGraphicsItemPrivate::children_at(int idx) const { Q_Q(const QmlGraphicsItem); QList children = q->childItems(); if (idx < children.count()) return qobject_cast(children.at(idx)); else return 0; } void QmlGraphicsItemPrivate::children_clear() { // ### } void QmlGraphicsItemPrivate::transform_removeAt(int i) { if (!transformData) return; transformData->graphicsTransforms.removeAt(i); dirtySceneTransform = 1; } int QmlGraphicsItemPrivate::transform_count() const { return transformData ? transformData->graphicsTransforms.size() : 0; } void QmlGraphicsItemPrivate::transform_append(QGraphicsTransform *item) { appendGraphicsTransform(item); } void QmlGraphicsItemPrivate::transform_insert(int, QGraphicsTransform *) { // ### } QGraphicsTransform *QmlGraphicsItemPrivate::transform_at(int idx) const { if (!transformData) return 0; return transformData->graphicsTransforms.at(idx); } void QmlGraphicsItemPrivate::transform_clear() { if (!transformData) return; Q_Q(QmlGraphicsItem); q->setTransformations(QList()); } /*! \qmlproperty list Item::data \default The data property is allows you to freely mix visual children and resources of an item. If you assign a visual item to the data list it becomes a child and if you assign any other object type, it is added as a resource. So you can write: \qml Item { Text {} Rectangle {} Script {} } \endqml instead of: \qml Item { children: [ Text {}, Rectangle {} ] resources: [ Script {} ] } \endqml data is a behind-the-scenes property: you should never need to explicitly specify it. */ /*! \property QmlGraphicsItem::data \internal */ /*! \internal */ QmlList *QmlGraphicsItem::data() { Q_D(QmlGraphicsItem); return &d->data; } /*! \property QmlGraphicsItem::childrenRect \brief The geometry of an item's children. childrenRect provides an easy way to access the (collective) position and size of the item's children. */ QRectF QmlGraphicsItem::childrenRect() { Q_D(QmlGraphicsItem); if (!d->_contents) { d->_contents = new QmlGraphicsContents; d->_contents->setParent(this); d->_contents->setItem(this); } return d->_contents->rectF(); } bool QmlGraphicsItem::clip() const { return flags() & ItemClipsChildrenToShape; } void QmlGraphicsItem::setClip(bool c) { setFlag(ItemClipsChildrenToShape, c); } /*! \qmlproperty real Item::x \qmlproperty real Item::y \qmlproperty real Item::width \qmlproperty real Item::height Defines the item's position and size relative to its parent. \qml Item { x: 100; y: 100; width: 100; height: 100 } \endqml */ /*! \property QmlGraphicsItem::width Defines the item's width relative to its parent. */ /*! \property QmlGraphicsItem::height Defines the item's height relative to its parent. */ /*! \qmlproperty real Item::z Sets the stacking order of the item. By default the stacking order is 0. Items with a higher stacking value are drawn on top of items with a lower stacking order. Items with the same stacking value are drawn bottom up in the order they appear. Items with a negative stacking value are drawn under their parent's content. The following example shows the various effects of stacking order. \table \row \o \image declarative-item_stacking1.png \o Same \c z - later children above earlier children: \qml Item { Rectangle { color: "red" width: 100; height: 100 } Rectangle { color: "blue" x: 50; y: 50; width: 100; height: 100 } } \endqml \row \o \image declarative-item_stacking2.png \o Higher \c z on top: \qml Item { Rectangle { z: 1 color: "red" width: 100; height: 100 } Rectangle { color: "blue" x: 50; y: 50; width: 100; height: 100 } } \endqml \row \o \image declarative-item_stacking3.png \o Same \c z - children above parents: \qml Item { Rectangle { color: "red" width: 100; height: 100 Rectangle { color: "blue" x: 50; y: 50; width: 100; height: 100 } } } \endqml \row \o \image declarative-item_stacking4.png \o Lower \c z below: \qml Item { Rectangle { color: "red" width: 100; height: 100 Rectangle { z: -1 color: "blue" x: 50; y: 50; width: 100; height: 100 } } } \endqml \endtable */ /*! \qmlproperty bool Item::visible Whether the item is visible. By default this is true. \note visible is not linked to actual visibility; if you item goes off screen, or the opacity changes to 0, etc this will not affect the visible property. */ /*! This function is called to handle this item's changes in geometry from \a oldGeometry to \a newGeometry. If the two geometries are the same, it doesn't do anything. */ void QmlGraphicsItem::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) { Q_D(QmlGraphicsItem); if (d->_anchors) d->_anchors->d_func()->updateMe(); if (transformOrigin() != QmlGraphicsItem::TopLeft) setTransformOriginPoint(d->computeTransformOrigin()); if (newGeometry.x() != oldGeometry.x()) emit xChanged(); if (newGeometry.width() != oldGeometry.width()) emit widthChanged(); if (newGeometry.y() != oldGeometry.y()) emit yChanged(); if (newGeometry.height() != oldGeometry.height()) emit heightChanged(); for(int ii = 0; ii < d->dependantAnchors.count(); ++ii) { QmlGraphicsAnchors *anchor = d->dependantAnchors.at(ii); anchor->d_func()->update(this, newGeometry, oldGeometry); } } /*! \internal */ void QmlGraphicsItem::keyPressEvent(QKeyEvent *event) { Q_D(QmlGraphicsItem); if (d->keyHandler) d->keyHandler->keyPressed(event); else event->ignore(); } /*! \internal */ void QmlGraphicsItem::keyReleaseEvent(QKeyEvent *event) { Q_D(QmlGraphicsItem); if (d->keyHandler) d->keyHandler->keyReleased(event); else event->ignore(); } /*! \internal */ void QmlGraphicsItem::inputMethodEvent(QInputMethodEvent *event) { Q_D(QmlGraphicsItem); if (d->keyHandler) d->keyHandler->inputMethodEvent(event); else event->ignore(); } /*! \internal */ QVariant QmlGraphicsItem::inputMethodQuery(Qt::InputMethodQuery query) const { Q_D(const QmlGraphicsItem); QVariant v; if (d->keyHandler) v = d->keyHandler->inputMethodQuery(query); if (!v.isValid()) v = QGraphicsObject::inputMethodQuery(query); return v; } /*! \qmlproperty string Item::id This property holds the identifier for the item. The identifier can be used in bindings and other expressions to refer to the item. For example: \qml Text { id: myText; ... } Text { text: myText.text } \endqml The identifier is available throughout to the \l {components}{component} where it is declared. The identifier must be unique in thecomponent. */ /*! \internal */ QmlGraphicsAnchorLine QmlGraphicsItem::left() const { Q_D(const QmlGraphicsItem); return d->anchorLines()->left; } /*! \internal */ QmlGraphicsAnchorLine QmlGraphicsItem::right() const { Q_D(const QmlGraphicsItem); return d->anchorLines()->right; } /*! \internal */ QmlGraphicsAnchorLine QmlGraphicsItem::horizontalCenter() const { Q_D(const QmlGraphicsItem); return d->anchorLines()->hCenter; } /*! \internal */ QmlGraphicsAnchorLine QmlGraphicsItem::top() const { Q_D(const QmlGraphicsItem); return d->anchorLines()->top; } /*! \internal */ QmlGraphicsAnchorLine QmlGraphicsItem::bottom() const { Q_D(const QmlGraphicsItem); return d->anchorLines()->bottom; } /*! \internal */ QmlGraphicsAnchorLine QmlGraphicsItem::verticalCenter() const { Q_D(const QmlGraphicsItem); return d->anchorLines()->vCenter; } /*! \internal */ QmlGraphicsAnchorLine QmlGraphicsItem::baseline() const { Q_D(const QmlGraphicsItem); return d->anchorLines()->baseline; } /*! \property QmlGraphicsItem::top \internal */ /*! \property QmlGraphicsItem::bottom \internal */ /*! \property QmlGraphicsItem::left \internal */ /*! \property QmlGraphicsItem::right \internal */ /*! \property QmlGraphicsItem::horizontalCenter \internal */ /*! \property QmlGraphicsItem::verticalCenter \internal */ /*! \qmlproperty AnchorLine Item::top \qmlproperty AnchorLine Item::bottom \qmlproperty AnchorLine Item::left \qmlproperty AnchorLine Item::right \qmlproperty AnchorLine Item::horizontalCenter \qmlproperty AnchorLine Item::verticalCenter \qmlproperty AnchorLine Item::baseline The anchor lines of the item. For more information see \l {anchor-layout}{Anchor Layouts}. */ /*! \qmlproperty AnchorLine Item::anchors.top \qmlproperty AnchorLine Item::anchors.bottom \qmlproperty AnchorLine Item::anchors.left \qmlproperty AnchorLine Item::anchors.right \qmlproperty AnchorLine Item::anchors.horizontalCenter \qmlproperty AnchorLine Item::anchors.verticalCenter \qmlproperty AnchorLine Item::anchors.baseline \qmlproperty Item Item::anchors.fill \qmlproperty Item Item::anchors.centerIn \qmlproperty real Item::anchors.topMargin \qmlproperty real Item::anchors.bottomMargin \qmlproperty real Item::anchors.leftMargin \qmlproperty real Item::anchors.rightMargin \qmlproperty real Item::anchors.horizontalCenterOffset \qmlproperty real Item::anchors.verticalCenterOffset \qmlproperty real Item::anchors.baselineOffset Anchors provide a way to position an item by specifying its relationship with other items. Margins apply to top, bottom, left, right, and fill anchors. Offsets apply for horizontal center, vertical center, and baseline anchors. \table \row \o \image declarative-anchors_example.png \o Text anchored to Image, horizontally centered and vertically below, with a margin. \qml Image { id: pic; ... } Text { id: label anchors.horizontalCenter: pic.horizontalCenter anchors.top: pic.bottom anchors.topMargin: 5 ... } \endqml \row \o \image declarative-anchors_example2.png \o Left of Text anchored to right of Image, with a margin. The y property of both defaults to 0. \qml Image { id: pic; ... } Text { id: label anchors.left: pic.right anchors.leftMargin: 5 ... } \endqml \endtable anchors.fill provides a convenient way for one item to have the same geometry as another item, and is equivalent to connecting all four directional anchors. \note You can only anchor an item to siblings or a parent. For more information see \l {anchor-layout}{Anchor Layouts}. */ /*! \property QmlGraphicsItem::baselineOffset \brief The position of the item's baseline in local coordinates. The baseline of a Text item is the imaginary line on which the text sits. Controls containing text usually set their baseline to the baseline of their text. For non-text items, a default baseline offset of 0 is used. */ qreal QmlGraphicsItem::baselineOffset() const { Q_D(const QmlGraphicsItem); if (!d->_baselineOffset.isValid()) { return 0.0; } else return d->_baselineOffset; } void QmlGraphicsItem::setBaselineOffset(qreal offset) { Q_D(QmlGraphicsItem); if (offset == d->_baselineOffset) return; d->_baselineOffset = offset; emit baselineOffsetChanged(); for(int ii = 0; ii < d->dependantAnchors.count(); ++ii) { QmlGraphicsAnchors *anchor = d->dependantAnchors.at(ii); anchor->d_func()->updateVerticalAnchors(); } } /*! \qmlproperty real Item::rotation This property holds the rotation of the item in degrees clockwise. This specifies how many degrees to rotate the item around its transformOrigin. The default rotation is 0 degrees (i.e. not rotated at all). \table \row \o \image declarative-rotation.png \o \qml Rectangle { color: "blue" width: 100; height: 100 Rectangle { color: "green" width: 25; height: 25 } Rectangle { color: "red" x: 25; y: 25; width: 50; height: 50 rotation: 30 } } \endqml \endtable */ /*! \qmlproperty real Item::scale This property holds the scale of the item. A scale of less than 1 means the item will be displayed smaller than normal, and a scale of greater than 1 means the item will be displayed larger than normal. A negative scale means the item will be mirrored. By default, items are displayed at a scale of 1 (i.e. at their normal size). Scaling is from the item's transformOrigin. \table \row \o \image declarative-scale.png \o \qml Rectangle { color: "blue" width: 100; height: 100 Rectangle { color: "green" width: 25; height: 25 } Rectangle { color: "red" x: 25; y: 25; width: 50; height: 50 scale: 1.4 } } \endqml \endtable */ /*! \qmlproperty real Item::opacity The opacity of the item. Opacity is specified as a number between 0 (fully transparent) and 1 (fully opaque). The default is 1. Opacity is an \e inherited attribute. That is, the opacity is also applied individually to child items. In almost all cases this is what you want. If you can spot the issue in the following example, you might need to use an opacity filter (not yet available) instead. \table \row \o \image declarative-item_opacity1.png \o \qml Item { Rectangle { color: "red" width: 100; height: 100 Rectangle { color: "blue" x: 50; y: 50; width: 100; height: 100 } } } \endqml \row \o \image declarative-item_opacity2.png \o \qml Item { Rectangle { opacity: 0.5 color: "red" width: 100; height: 100 Rectangle { color: "blue" x: 50; y: 50; width: 100; height: 100 } } } \endqml \endtable */ /*! Returns a value indicating whether mouse input should remain with this item exclusively. \sa setKeepMouseGrab() */ bool QmlGraphicsItem::keepMouseGrab() const { Q_D(const QmlGraphicsItem); return d->_keepMouse; } /*! The flag indicating whether the mouse should remain with this item is set to \a keep. This is useful for items that wish to grab and keep mouse interaction following a predefined gesture. For example, an item that is interested in horizontal mouse movement may set keepMouseGrab to true once a threshold has been exceeded. Once keepMouseGrab has been set to true, filtering items will not react to mouse events. If the item does not indicate that it wishes to retain mouse grab, a filtering item may steal the grab. For example, Flickable may attempt to steal a mouse grab if it detects that the user has begun to move the viewport. \sa keepMouseGrab */ void QmlGraphicsItem::setKeepMouseGrab(bool keep) { Q_D(QmlGraphicsItem); d->_keepMouse = keep; } /*! \internal This function emits the \e focusChanged signal. Subclasses overriding this function should call up to their base class. */ void QmlGraphicsItem::focusChanged(bool flag) { Q_UNUSED(flag); emit focusChanged(); } /*! \internal */ QmlList *QmlGraphicsItem::fxChildren() { Q_D(QmlGraphicsItem); return &(d->children); } /*! \internal */ QmlList *QmlGraphicsItem::resources() { Q_D(QmlGraphicsItem); return &(d->resources); } /*! \qmlproperty list Item::states This property holds a list of states defined by the item. \qml Item { states: [ State { ... }, State { ... } ... ] } \endqml \sa {qmlstate}{States} */ /*! \property QmlGraphicsItem::states \internal */ /*! \internal */ QmlList* QmlGraphicsItem::states() { Q_D(QmlGraphicsItem); return d->states()->statesProperty(); } /*! \qmlproperty list Item::transitions This property holds a list of transitions defined by the item. \qml Item { transitions: [ Transition { ... }, Transition { ... } ... ] } \endqml \sa {state-transitions}{Transitions} */ /*! \property QmlGraphicsItem::transitions \internal */ /*! \internal */ QmlList* QmlGraphicsItem::transitions() { Q_D(QmlGraphicsItem); return d->states()->transitionsProperty(); } /* \qmlproperty list Item::filter This property holds a list of graphical filters to be applied to the item. \l {Filter}{Filters} include things like \l {Blur}{blurring} the item, or giving it a \l Reflection. Some filters may not be available on all canvases; if a filter is not available on a certain canvas, it will simply not be applied for that canvas (but the QML will still be considered valid). \qml Item { filter: [ Blur { ... }, Relection { ... } ... ] } \endqml */ /*! \qmlproperty bool Item::clip This property holds whether clipping is enabled. if clipping is enabled, an item will clip its own painting, as well as the painting of its children, to its bounding rectangle. Non-rectangular clipping regions are not supported for performance reasons. */ /*! \property QmlGraphicsItem::clip This property holds whether clipping is enabled. if clipping is enabled, an item will clip its own painting, as well as the painting of its children, to its bounding rectangle. Non-rectangular clipping regions are not supported for performance reasons. */ /*! \qmlproperty string Item::state This property holds the name of the current state of the item. This property is often used in scripts to change between states. For example: \qml Script { function toggle() { if (button.state == 'On') button.state = 'Off'; else button.state = 'On'; } } \endqml If the item is in its base state (i.e. no explicit state has been set), \c state will be a blank string. Likewise, you can return an item to its base state by setting its current state to \c ''. \sa {qmlstates}{States} */ /*! \property QmlGraphicsItem::state \internal */ /*! \internal */ QString QmlGraphicsItem::state() const { Q_D(const QmlGraphicsItem); if (!d->_stateGroup) return QString(); else return d->_stateGroup->state(); } /*! \internal */ void QmlGraphicsItem::setState(const QString &state) { Q_D(QmlGraphicsItem); d->states()->setState(state); } /*! \qmlproperty list Item::transform This property holds the list of transformations to apply. For more information see \l Transform. */ /*! \property QmlGraphicsItem::transform \internal */ /*! \internal */ QmlList* QmlGraphicsItem::transform() { Q_D(QmlGraphicsItem); return &(d->transform); } /*! \internal classBegin() is called when the item is constructed, but its properties have not yet been set. \sa componentComplete(), isComponentComplete() */ void QmlGraphicsItem::classBegin() { Q_D(QmlGraphicsItem); d->_componentComplete = false; if (d->_stateGroup) d->_stateGroup->classBegin(); if (d->_anchors) d->_anchors->classBegin(); } /*! \internal componentComplete() is called when all items in the component have been constructed. It is often desireable to delay some processing until the component is complete an all bindings in the component have been resolved. */ void QmlGraphicsItem::componentComplete() { #ifdef Q_ENABLE_PERFORMANCE_LOG QmlPerfTimer cc; #endif Q_D(QmlGraphicsItem); d->_componentComplete = true; if (d->_stateGroup) d->_stateGroup->componentComplete(); if (d->_anchors) { d->_anchors->componentComplete(); d->_anchors->d_func()->updateOnComplete(); } if (d->keyHandler) d->keyHandler->componentComplete(); } QmlStateGroup *QmlGraphicsItemPrivate::states() { Q_Q(QmlGraphicsItem); if (!_stateGroup) { _stateGroup = new QmlStateGroup(q); if (!_componentComplete) _stateGroup->classBegin(); QObject::connect(_stateGroup, SIGNAL(stateChanged(QString)), q, SIGNAL(stateChanged(QString))); } return _stateGroup; } QmlGraphicsItemPrivate::AnchorLines::AnchorLines(QmlGraphicsItem *q) { left.item = q; left.anchorLine = QmlGraphicsAnchorLine::Left; right.item = q; right.anchorLine = QmlGraphicsAnchorLine::Right; hCenter.item = q; hCenter.anchorLine = QmlGraphicsAnchorLine::HCenter; top.item = q; top.anchorLine = QmlGraphicsAnchorLine::Top; bottom.item = q; bottom.anchorLine = QmlGraphicsAnchorLine::Bottom; vCenter.item = q; vCenter.anchorLine = QmlGraphicsAnchorLine::VCenter; baseline.item = q; baseline.anchorLine = QmlGraphicsAnchorLine::Baseline; } QPointF QmlGraphicsItemPrivate::computeTransformOrigin() const { Q_Q(const QmlGraphicsItem); QRectF br = q->boundingRect(); switch(origin) { default: case QmlGraphicsItem::TopLeft: return QPointF(0, 0); case QmlGraphicsItem::Top: return QPointF(br.width() / 2., 0); case QmlGraphicsItem::TopRight: return QPointF(br.width(), 0); case QmlGraphicsItem::Left: return QPointF(0, br.height() / 2.); case QmlGraphicsItem::Center: return QPointF(br.width() / 2., br.height() / 2.); case QmlGraphicsItem::Right: return QPointF(br.width(), br.height() / 2.); case QmlGraphicsItem::BottomLeft: return QPointF(0, br.height()); case QmlGraphicsItem::Bottom: return QPointF(br.width() / 2., br.height()); case QmlGraphicsItem::BottomRight: return QPointF(br.width(), br.height()); } } /*! \internal */ bool QmlGraphicsItem::sceneEvent(QEvent *event) { bool rv = QGraphicsItem::sceneEvent(event); if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut) { focusChanged(hasFocus()); } return rv; } /*! \internal */ QVariant QmlGraphicsItem::itemChange(GraphicsItemChange change, const QVariant &value) { if (change == ItemParentHasChanged) { emit parentChanged(); } return QGraphicsItem::itemChange(change, value); } /*! \internal */ QRectF QmlGraphicsItem::boundingRect() const { Q_D(const QmlGraphicsItem); return QRectF(0, 0, d->width, d->height); } /*! \enum QmlGraphicsItem::TransformOrigin Controls the point about which simple transforms like scale apply. \value TopLeft The top-left corner of the item. \value Top The center point of the top of the item. \value TopRight The top-right corner of the item. \value Left The left most point of the vertical middle. \value Center The center of the item. \value Right The right most point of the vertical middle. \value BottomLeft The bottom-left corner of the item. \value Bottom The center point of the bottom of the item. \value BottomRight The bottom-right corner of the item. */ /*! Returns the current transform origin. */ QmlGraphicsItem::TransformOrigin QmlGraphicsItem::transformOrigin() const { Q_D(const QmlGraphicsItem); return d->origin; } /*! Set the transform \a origin. */ void QmlGraphicsItem::setTransformOrigin(TransformOrigin origin) { Q_D(QmlGraphicsItem); if (origin != d->origin) { d->origin = origin; QGraphicsItem::setTransformOriginPoint(d->computeTransformOrigin()); } } /*! \property QmlGraphicsItem::smooth \brief whether the item is smoothly transformed. This property is provided purely for the purpose of optimization. Turning smooth transforms off is faster, but looks worse; turning smooth transformations on is slower, but looks better. By default smooth transformations are off. */ /*! Returns true if the item should be drawn with antialiasing and smooth pixmap filtering, false otherwise. The default is false. \sa setSmooth() */ bool QmlGraphicsItem::smooth() const { Q_D(const QmlGraphicsItem); return d->smooth; } /*! Sets whether the item should be drawn with antialiasing and smooth pixmap filtering to \a smooth. \sa smooth() */ void QmlGraphicsItem::setSmooth(bool smooth) { Q_D(QmlGraphicsItem); if (d->smooth == smooth) return; d->smooth = smooth; update(); } qreal QmlGraphicsItem::width() const { Q_D(const QmlGraphicsItem); return d->width; } void QmlGraphicsItem::setWidth(qreal w) { Q_D(QmlGraphicsItem); d->widthValid = true; if (d->width == w) return; qreal oldWidth = d->width; prepareGeometryChange(); d->width = w; update(); geometryChanged(QRectF(x(), y(), width(), height()), QRectF(x(), y(), oldWidth, height())); } void QmlGraphicsItem::resetWidth() { Q_D(QmlGraphicsItem); d->widthValid = false; setImplicitWidth(implicitWidth()); } qreal QmlGraphicsItem::implicitWidth() const { Q_D(const QmlGraphicsItem); return d->implicitWidth; } void QmlGraphicsItem::setImplicitWidth(qreal w) { Q_D(QmlGraphicsItem); d->implicitWidth = w; if (d->width == w || widthValid()) return; qreal oldWidth = d->width; prepareGeometryChange(); d->width = w; update(); geometryChanged(QRectF(x(), y(), width(), height()), QRectF(x(), y(), oldWidth, height())); } bool QmlGraphicsItem::widthValid() const { Q_D(const QmlGraphicsItem); return d->widthValid; } qreal QmlGraphicsItem::height() const { Q_D(const QmlGraphicsItem); return d->height; } void QmlGraphicsItem::setHeight(qreal h) { Q_D(QmlGraphicsItem); d->heightValid = true; if (d->height == h) return; qreal oldHeight = d->height; prepareGeometryChange(); d->height = h; update(); geometryChanged(QRectF(x(), y(), width(), height()), QRectF(x(), y(), width(), oldHeight)); } void QmlGraphicsItem::resetHeight() { Q_D(QmlGraphicsItem); d->heightValid = false; setImplicitHeight(implicitHeight()); } qreal QmlGraphicsItem::implicitHeight() const { Q_D(const QmlGraphicsItem); return d->implicitHeight; } void QmlGraphicsItem::setImplicitHeight(qreal h) { Q_D(QmlGraphicsItem); d->implicitHeight = h; if (d->height == h || heightValid()) return; qreal oldHeight = d->height; prepareGeometryChange(); d->height = h; update(); geometryChanged(QRectF(x(), y(), width(), height()), QRectF(x(), y(), width(), oldHeight)); } bool QmlGraphicsItem::heightValid() const { Q_D(const QmlGraphicsItem); return d->heightValid; } /*! \qmlproperty bool Item::wantsFocus This property indicates whether the item has has an active focus request. */ /*! \internal */ bool QmlGraphicsItem::wantsFocus() const { return focusItem() != 0; } /*! \qmlproperty bool Item::focus This property indicates whether the item has keyboard input focus. Set this property to true to request focus. */ /*! \internal */ bool QmlGraphicsItem::hasFocus() const { return QGraphicsItem::hasFocus(); } /*! \internal */ void QmlGraphicsItem::setFocus(bool focus) { if (focus) QGraphicsItem::setFocus(Qt::OtherFocusReason); else QGraphicsItem::clearFocus(); } /*! \reimp \internal */ void QmlGraphicsItem::paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *) { } /*! \reimp \internal */ bool QmlGraphicsItem::event(QEvent *ev) { return QGraphicsObject::event(ev); } QDebug operator<<(QDebug debug, QmlGraphicsItem *item) { if (!item) { debug << "QmlGraphicsItem(0)"; return debug; } debug << item->metaObject()->className() << "(this =" << ((void*)item) << ", parent =" << ((void*)item->parentItem()) << ", geometry =" << QRectF(item->pos(), QSizeF(item->width(), item->height())) << ", z =" << item->zValue() << ")"; return debug; } int QmlGraphicsItemPrivate::consistentTime = -1; void QmlGraphicsItemPrivate::setConsistentTime(int t) { consistentTime = t; } QTime QmlGraphicsItemPrivate::currentTime() { if (consistentTime == -1) return QTime::currentTime(); else return QTime(0, 0).addMSecs(consistentTime); } void QmlGraphicsItemPrivate::start(QTime &t) { t = currentTime(); } int QmlGraphicsItemPrivate::elapsed(QTime &t) { int n = t.msecsTo(currentTime()); if (n < 0) // passed midnight n += 86400 * 1000; return n; } int QmlGraphicsItemPrivate::restart(QTime &t) { QTime time = currentTime(); int n = t.msecsTo(time); if (n < 0) // passed midnight n += 86400*1000; t = time; return n; } #include "qmlgraphicsitem.moc" #include "moc_qmlgraphicsitem.cpp" QT_END_NAMESPACE QML_DECLARE_TYPE(QmlGraphicsKeysAttached) QML_DECLARE_TYPEINFO(QmlGraphicsKeysAttached, QML_HAS_ATTACHED_PROPERTIES) QML_DEFINE_TYPE(Qt,4,6,Keys,QmlGraphicsKeysAttached) QML_DECLARE_TYPE(QmlGraphicsKeyNavigationAttached) QML_DECLARE_TYPEINFO(QmlGraphicsKeyNavigationAttached, QML_HAS_ATTACHED_PROPERTIES) QML_DEFINE_TYPE(Qt,4,6,KeyNavigation,QmlGraphicsKeyNavigationAttached)