\qmltype Window \instantiates QQuickWindow \inqmlmodule QtQuick More...

#include <qquickwindow.h>

Inheritance diagram for QQuickWindow:

Collaboration diagram for QQuickWindow:

Public Slots
void	update ()
	Schedules the window to render another frame.

void	releaseResources ()
	This function tries to release redundant resources currently held by the QML scene.

Public Slots inherited from QWindow
	Q_REVISION (2, 1) void requestActivate()

void	setVisible (bool visible)

void	show ()
	Shows the window.

void	hide ()
	Hides the window.

void	showMinimized ()
	Shows the window as minimized.

void	showMaximized ()
	Shows the window as maximized.

void	showFullScreen ()
	Shows the window as fullscreen.

void	showNormal ()
	Shows the window as normal, i.e.

bool	close ()
	Close the window.

void	raise ()
	Raise the window in the windowing system.

void	lower ()
	Lower the window in the windowing system.

bool	startSystemResize (Qt::Edges edges)
	Start a system-specific resize operation.

bool	startSystemMove ()
	Start a system-specific move operation.

void	setTitle (const QString &)

void	setX (int arg)

void	setY (int arg)

void	setWidth (int arg)

void	setHeight (int arg)

void	setGeometry (int posx, int posy, int w, int h)
	Sets the geometry of the window, excluding its window frame, to a rectangle constructed from posx, posy, w and h.

void	setGeometry (const QRect &rect)
	Sets the geometry of the window, excluding its window frame, to rect.

void	setMinimumWidth (int w)

void	setMinimumHeight (int h)

void	setMaximumWidth (int w)

void	setMaximumHeight (int h)

	Q_REVISION (2, 1) void alert(int msec)

	Q_REVISION (2, 3) void requestUpdate()

Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe

Signals
void	frameSwapped ()
	This signal is emitted when a frame has been queued for presenting.

void	sceneGraphInitialized ()
	\qmlsignal QtQuick::Window::frameSwapped()

void	sceneGraphInvalidated ()
	\qmlsignal QtQuick::Window::sceneGraphInitialized()

void	beforeSynchronizing ()
	This signal is emitted before the scene graph is synchronized with the QML state.

	Q_REVISION (2, 2) void afterSynchronizing()

void	beforeRendering ()
	\qmlsignal QtQuick::Window::afterSynchronizing()

void	afterRendering ()
	\qmlsignal QtQuick::Window::beforeRendering()

	Q_REVISION (2, 2) void afterAnimating()

	Q_REVISION (2, 2) void sceneGraphAboutToStop()

	Q_REVISION (2, 1) void closing(QQuickCloseEvent *close)

void	colorChanged (const QColor &)

	Q_REVISION (2, 1) void activeFocusItemChanged()

Q_REVISION(2, 2) void sceneGraphError(QQuickWindow	Q_REVISION (2, 14) void beforeRenderPassRecording()

	Q_REVISION (2, 14) void afterRenderPassRecording()

	Q_REVISION (6, 0) void paletteChanged()

	Q_REVISION (6, 0) void paletteCreated()

	Q_REVISION (6, 0) void beforeFrameBegin()

	Q_REVISION (6, 0) void afterFrameEnd()

Signals inherited from QWindow
void	screenChanged (QScreen *screen)
	This signal is emitted when a window's screen changes, either by being set explicitly with setScreen(), or automatically when the window's screen is removed.

void	modalityChanged (Qt::WindowModality modality)
	This signal is emitted when the Qwindow::modality property changes to modality.

void	windowStateChanged (Qt::WindowState windowState)
	This signal is emitted when the windowState changes, either by being set explicitly with setWindowStates(), or automatically when the user clicks one of the titlebar buttons or by other means.

	Q_REVISION (2, 2) void windowTitleChanged(const QString &title)

void	xChanged (int arg)

void	yChanged (int arg)

void	widthChanged (int arg)

void	heightChanged (int arg)

void	minimumWidthChanged (int arg)

void	minimumHeightChanged (int arg)

void	maximumWidthChanged (int arg)

void	maximumHeightChanged (int arg)

void	visibleChanged (bool arg)

Q_REVISION(2, 1) void visibilityChanged(QWindow	Q_REVISION (2, 1) void activeChanged()

void	contentOrientationChanged (Qt::ScreenOrientation orientation)

void	focusObjectChanged (QObject *object)
	This signal is emitted when the final receiver of events tied to focus is changed to object.

	Q_REVISION (2, 1) void opacityChanged(qreal opacity)

	Q_REVISION (2, 13) void transientParentChanged(QWindow *transientParent)

Signals inherited from QObject
void	destroyed (QObject *=nullptr)
	This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.

void	objectNameChanged (const QString &objectName, QPrivateSignal)
	This signal is emitted after the object's name has been changed.

Protected Member Functions
	QQuickWindow (QQuickWindowPrivate &dd, QWindow *parent=nullptr)

	QQuickWindow (QQuickWindowPrivate &dd, QQuickRenderControl *control)

void	exposeEvent (QExposeEvent *) override
	\reimp

void	resizeEvent (QResizeEvent *) override
	\reimp

void	showEvent (QShowEvent *) override
	\reimp

void	hideEvent (QHideEvent *) override
	\reimp

void	closeEvent (QCloseEvent *) override
	\reimp

void	focusInEvent (QFocusEvent *) override
	\reimp

void	focusOutEvent (QFocusEvent *) override
	\reimp

bool	event (QEvent *) override
	\reimp

void	keyPressEvent (QKeyEvent *) override
	\reimp

void	keyReleaseEvent (QKeyEvent *) override
	\reimp

void	mousePressEvent (QMouseEvent *) override
	\reimp

void	mouseReleaseEvent (QMouseEvent *) override
	\reimp

void	mouseDoubleClickEvent (QMouseEvent *) override
	\reimp

void	mouseMoveEvent (QMouseEvent *) override
	\reimp

Protected Member Functions inherited from QWindow
virtual void	paintEvent (QPaintEvent *)
	The paint event (ev) is sent by the window system whenever an area of the window needs a repaint, for example when initially showing the window, or due to parts of the window being uncovered by moving another window.

virtual void	moveEvent (QMoveEvent *)
	Override this to handle window move events (ev).

virtual void	touchEvent (QTouchEvent *)
	Override this to handle touch events (ev).

virtual bool	nativeEvent (const QByteArray &eventType, void message, qintptr result)
	Override this to handle platform dependent events.

	QWindow (QWindowPrivate &dd, QWindow *parent)
	Creates a window as a child of the given parent window with the dd private implementation.

Protected Member Functions inherited from QObject
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.

int	senderSignalIndex () const

int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal.

bool	isSignalConnected (const QMetaMethod &signal) const

virtual void	timerEvent (QTimerEvent *event)
	This event handler can be reimplemented in a subclass to receive timer events for the object.

virtual void	childEvent (QChildEvent *event)
	This event handler can be reimplemented in a subclass to receive child events.

virtual void	customEvent (QEvent *event)
	This event handler can be reimplemented in a subclass to receive custom events.

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

	QObject (QObjectPrivate &dd, QObject *parent=nullptr)

Protected Member Functions inherited from QSurface
	QSurface (SurfaceClass type)
	Creates a surface with the given type.

Properties
QColor	color
	\qmlproperty color Window::color

QQuickItem *	contentItem
	\qmlattachedproperty Item Window::contentItem

QQuickItem *	activeFocusItem
	The item which currently has active focus or `null` if there is no item with active focus.

Properties inherited from QWindow
QString	title
	the window's title in the windowing system

Qt::WindowModality	modality
	the modality of the window

Qt::WindowFlags	flags
	the window flags of the window

int	x
	the x position of the window's geometry

int	y
	the y position of the window's geometry

int	width
	the width of the window's geometry

int	height
	the height of the window's geometry

int	minimumWidth
	the minimum width of the window's geometry

int	minimumHeight
	the minimum height of the window's geometry

int	maximumWidth
	the maximum width of the window's geometry

int	maximumHeight
	the maximum height of the window's geometry

bool	visible
	whether the window is visible or not

bool	active
	the active status of the window

Visibility	visibility
	the screen-occupation state of the window

Qt::ScreenOrientation	contentOrientation
	the orientation of the window's contents

qreal	opacity
	The opacity of the window in the windowing system.

Properties inherited from QObject
QString	objectName
	the name of this object

Private Member Functions
	~QQuickWindow () override
	Destroys the window.

QObject *	focusObject () const override

Friends
class	QQuickItem

class	QQuickItemPrivate

class	QQuickWidget

class	QQuickRenderControl

class	QQuickAnimatorController

class	QQuickWidgetPrivate

class	QQuickDeliveryAgentPrivate

QQmlInfo	operator<< (QQmlInfo info, const QQuickWindow *window)

Additional Inherited Members
Public Types inherited from QSurface
enum	SurfaceClass { Window , Offscreen }
	The SurfaceClass enum describes the actual subclass of the surface. More...

enum	SurfaceType { RasterSurface , OpenGLSurface , RasterGLSurface , OpenVGSurface , VulkanSurface , MetalSurface , Direct3DSurface }
	The SurfaceType enum describes what type of surface this is. More...

Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)
	Constructs an object with parent object parent.

virtual	~QObject ()
	Destroys the object, deleting all its child objects.

virtual bool	eventFilter (QObject watched, QEvent event)
	Filters events if this object has been installed as an event filter for the watched object.

QString	objectName () const

Q_WEAK_OVERLOAD void	setObjectName (const QString &name)
	Sets the object's name to name.

void	setObjectName (QAnyStringView name)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QBindable< QString >	bindableObjectName ()

bool	isWidgetType () const
	Returns `true` if the object is a widget; otherwise returns `false`.

bool	isWindowType () const
	Returns `true` if the object is a window; otherwise returns `false`.

bool	isQuickItemType () const
	Returns `true` if the object is a QQuickItem; otherwise returns `false`.

bool	signalsBlocked () const noexcept
	Returns `true` if signals are blocked; otherwise returns `false`.

bool	blockSignals (bool b) noexcept
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).

QThread *	thread () const
	Returns the thread in which the object lives.

bool	moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
	Changes the thread affinity for this object and its children and returns `true` on success.

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
	This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.

int	startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)

void	killTimer (int id)
	Kills the timer with timer identifier, id.

void	killTimer (Qt::TimerId id)

template<typename T >
T	findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.

template<typename T >
QList< T >	findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects.

template<typename T >
T	findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

const QObjectList &	children () const
	Returns a list of child objects.

void	setParent (QObject *parent)
	Makes the object a child of parent.

void	installEventFilter (QObject *filterObj)
	Installs an event filter filterObj on this object.

void	removeEventFilter (QObject *obj)
	Removes an event filter object obj from this object.

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const

bool	disconnect (const char signal=nullptr, const QObject receiver=nullptr, const char *member=nullptr) const

bool	disconnect (const QObject receiver, const char member=nullptr) const

void	dumpObjectTree () const
	Dumps a tree of children to the debug output.

void	dumpObjectInfo () const
	Dumps information about signal connections, etc.

bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value.

bool	setProperty (const char *name, QVariant &&value)

QVariant	property (const char *name) const
	Returns the value of the object's name property.

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

QObject *	parent () const
	Returns a pointer to the parent object.

bool	inherits (const char *classname) const
	Returns `true` if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns `false`.

Public Member Functions inherited from QSurface
virtual	~QSurface ()
	Destroys the surface.

SurfaceClass	surfaceClass () const
	Returns the surface class of this surface.

virtual QPlatformSurface *	surfaceHandle () const =0
	Returns a handle to the platform-specific implementation of the surface.

bool	supportsOpenGL () const
	Returns true if the surface is OpenGL compatible and can be used in conjunction with QOpenGLContext; otherwise returns false.

Static Public Member Functions inherited from QObject
static QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	\threadsafe

static QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	\threadsafe

static bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &member)

static bool	disconnect (const QMetaObject::Connection &)
	Disconnect a connection.

template<typename Func1 , typename Func2 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot)

template<typename Func1 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject receiver, void **zero)

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Protected Attributes inherited from QSurface
SurfaceClass	m_type

QSurfacePrivate *	m_reserved

Related Symbols inherited from QObject
template< class T > T	qobject_cast (const QObject *object)
	Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr.

template< typename T > T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

template< typename T > QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

	QObjectList
	\macro Q_CLASSINFO(Name, Value)

Detailed Description

\qmltype Window \instantiates QQuickWindow \inqmlmodule QtQuick

Creates a new top-level window.

The Window object creates a new top-level window for a Qt Quick scene. It automatically sets up the window for use with {QtQuick} graphical types.

A Window can be declared inside an Item or inside another Window, in which case the inner Window will automatically become "transient for" the outer Window, with the outer Window as its \l transientParent. Most platforms will show the Window centered upon the outer window in this case, and there may be other platform-dependent behaviors, depending also on the \l flags. If the nested window is intended to be a dialog in your application, you should also set \l flags to Qt.Dialog, because some window managers will not provide the centering behavior without that flag.

You can also declare multiple windows inside a top-level \l QtObject, in which case the windows will have no transient relationship.

Alternatively you can set or bind \l x and \l y to position the Window explicitly on the screen.

When the user attempts to close a window, the \l closing signal will be emitted. You can force the window to stay open (for example to prompt the user to save changes) by writing an onClosing handler that sets {close.accepted = false} unless it's safe to close the window (for example, because there are no more unsaved changes).

onClosing: (close) => {
    if (document.changed) {
        close.accepted = false
        confirmExitPopup.open()
    }
}
 
// The confirmExitPopup allows user to save or discard the document,
// or to cancel the closing.

Since: 5.0

\inmodule QtQuick

The QQuickWindow class provides the window for displaying a graphical QML scene.

QQuickWindow provides the graphical scene management needed to interact with and display a scene of QQuickItems.

A QQuickWindow always has a single invisible root item. To add items to this window, reparent the items to the root item or to an existing item in the scene.

For easily displaying a scene from a QML file, see \l{QQuickView}.

Definition at line 41 of file qquickwindow.h.

Constructor & Destructor Documentation

◆ QQuickWindow() [1/2]

QQuickWindow::QQuickWindow	(	QQuickWindowPrivate &	dd,
		QWindow *	parent = nullptr )

protected

Definition at line 1137 of file qquickwindow.cpp.

References d.

◆ QQuickWindow() [2/2]

QQuickWindow::QQuickWindow	(	QQuickWindowPrivate &	dd,
		QQuickRenderControl *	control )

protected

Definition at line 1161 of file qquickwindow.cpp.

References d.

Member Function Documentation

◆ ~QQuickWindow()

QQuickWindow::~QQuickWindow ( )

overrideprivate

Destroys the window.

Definition at line 1171 of file qquickwindow.cpp.

References d, QQuickRenderControlPrivate::get(), QQuickPixmap::purgeCache(), qDeleteAll(), and QObject::setParent().

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◆ afterRendering

void QQuickWindow::afterRendering ( )

signal

\qmlsignal QtQuick::Window::beforeRendering()

The signal is emitted after scene graph has added its commands to the command buffer, which is not yet submitted to the graphics queue. If desired, the slot function connected to this signal can query native resources, like the command buffer, before via QSGRendererInterface. Note however that the render pass (or passes) are already recorded at this point and it is not possible to add more commands within the scenegraph's pass. Instead, use afterRenderPassRecording() for that. This signal has therefore limited use in Qt 6, unlike in Qt 5. Rather, it is the combination of beforeRendering() and beforeRenderPassRecording(), or beforeRendering() and afterRenderPassRecording(), that is typically used to achieve under- or overlaying of the custom rendering.

Warning: This signal is emitted from the scene graph rendering thread. If your slot function needs to finish before execution continues, you must make sure that the connection is direct (see Qt::ConnectionType).

Note: When using OpenGL, be aware that setting OpenGL 3.x or 4.x specific states and leaving these enabled or set to non-default values when returning from the connected slot can interfere with the scene graph's rendering. The QOpenGLContext used for rendering by the scene graph will be bound when the signal is emitted.

See also: rendererInterface(), {Scene Graph - RHI Under QML}, {Scene Graph - OpenGL Under QML}, {Scene Graph - Metal Under QML}, {Scene Graph - Vulkan Under QML}, {Scene Graph - Direct3D 11 Under QML}

Referenced by QQuickItem::grabToImage(), and QWaylandQuickOutput::initialize().

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◆ beforeRendering

void QQuickWindow::beforeRendering ( )

signal

\qmlsignal QtQuick::Window::afterSynchronizing()

Since: 5.3

This signal is emitted after the preparations for the frame have been done, meaning there is a command buffer in recording mode, where applicable. If desired, the slot function connected to this signal can query native resources like the command before via QSGRendererInterface. Note however that the recording of the main render pass is not yet started at this point and it is not possible to add commands within that pass. Starting a pass means clearing the color, depth, and stencil buffers so it is not possible to achieve an underlay type of rendering by just connecting to this signal. Rather, connect to beforeRenderPassRecording(). However, connecting to this signal is still important if the recording of copy type of commands is desired since those cannot be enqueued within a render pass.

Warning: This signal is emitted from the scene graph rendering thread. If your slot function needs to finish before execution continues, you must make sure that the connection is direct (see Qt::ConnectionType).

Note: When using OpenGL, be aware that setting OpenGL 3.x or 4.x specific states and leaving these enabled or set to non-default values when returning from the connected slot can interfere with the scene graph's rendering. The QOpenGLContext used for rendering by the scene graph will be bound when the signal is emitted.

See also: rendererInterface(), {Scene Graph - RHI Under QML}, {Scene Graph - OpenGL Under QML}, {Scene Graph - Metal Under QML}, {Scene Graph - Vulkan Under QML}, {Scene Graph - Direct3D 11 Under QML}

Referenced by QQuick3DSGDirectRenderer::QQuick3DSGDirectRenderer(), QQuickRhiItemNode::QQuickRhiItemNode(), QQuickAnimatedNode::start(), and QQuickAnimatedNode::stop().

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◆ beforeSynchronizing

void QQuickWindow::beforeSynchronizing ( )

signal

This signal is emitted before the scene graph is synchronized with the QML state.

Even though the signal is emitted from the scene graph rendering thread, the GUI thread is guaranteed to be blocked, like it is in QQuickItem::updatePaintNode(). Therefore, it is safe to access GUI thread thread data in a slot or lambda that is connected with Qt::DirectConnection.

This signal can be used to do any preparation required before calls to QQuickItem::updatePaintNode().

When using OpenGL, the QOpenGLContext used for rendering by the scene graph will be bound at this point.

Warning: This signal is emitted from the scene graph rendering thread. If your slot function needs to finish before execution continues, you must make sure that the connection is direct (see Qt::ConnectionType).; When using OpenGL, be aware that setting OpenGL 3.x or 4.x specific states and leaving these enabled or set to non-default values when returning from the connected slot can interfere with the scene graph's rendering.

Referenced by QQuickItem::grabToImage(), QWaylandQuickOutput::initialize(), and QDeclarativeGeoMap::itemChange().

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◆ closeEvent()

void QQuickWindow::closeEvent ( QCloseEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 215 of file qquickwindow.cpp.

References emit, QEvent::isAccepted(), QEvent::setAccepted(), and QQuickCloseEvent::setAccepted().

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◆ colorChanged

void QQuickWindow::colorChanged ( const QColor & )

signal

◆ event()

bool QQuickWindow::event ( QEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Reimplemented in QQuickWindowQmlImpl.

Definition at line 1437 of file qquickwindow.cpp.

References QEvent::accept(), QEvent::ApplicationPaletteChange, QObject::childEvent(), QEvent::ChildWindowAdded, d, QEvent::DevicePixelRatioChange, QEvent::DragEnter, QEvent::DragLeave, QEvent::DragMove, QEvent::Drop, QEvent::Enter, QWindow::event(), QEvent::FocusAboutToChange, QQuickWindowPrivate::FullUpdateRequest, QPointingDevicePrivate::get(), QEvent::InputMethod, QEvent::InputMethodQuery, insert(), QQuickDeliveryAgentPrivate::isSynthMouse(), QQuickDeliveryAgentPrivate::isTouchEvent(), QEvent::LanguageChange, QEvent::Leave, QEvent::LocaleChange, QGuiApplication::palette(), QEvent::PlatformSurface, QEventPoint::Pressed, Q_ASSERT, Q_FALLTHROUGH, qCDebug, QEventPoint::Released, ret, QCoreApplication::sendEvent(), QQuickDeliveryAgentPrivate::subsceneAgentsExist, QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed, QEvent::TouchBegin, QEvent::TouchEnd, QEvent::TouchUpdate, QQuickWindowPrivate::TriggerContextCreationFailure, update(), QEvent::UpdateRequest, QEvent::WindowActivate, and QEvent::WindowDeactivate.

Referenced by QQuickWindowQmlImpl::event().

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◆ exposeEvent()

void QQuickWindow::exposeEvent ( QExposeEvent * )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 179 of file qquickwindow.cpp.

References d.

◆ focusInEvent()

void QQuickWindow::focusInEvent ( QFocusEvent * ev )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 232 of file qquickwindow.cpp.

References d.

◆ focusObject()

QObject * QQuickWindow::focusObject ( ) const

overrideprivatevirtual

\reimp

Reimplemented from QWindow.

Definition at line 1391 of file qquickwindow.cpp.

References d, and Q_ASSERT.

Referenced by QQuickTableViewPrivate::releaseItem().

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◆ focusOutEvent()

void QQuickWindow::focusOutEvent ( QFocusEvent * ev )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 224 of file qquickwindow.cpp.

References d.

◆ frameSwapped

void QQuickWindow::frameSwapped ( )

signal

This signal is emitted when a frame has been queued for presenting.

With vertical synchronization enabled the signal is emitted at most once per vsync interval in a continuously animating scene.

This signal will be emitted from the scene graph rendering thread.

Referenced by QQuickWindowPrivate::init(), QQuickAnimatedNode::start(), and QQuickAnimatedNode::stop().

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◆ hideEvent()

void QQuickWindow::hideEvent ( QHideEvent * )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 205 of file qquickwindow.cpp.

References d.

◆ keyPressEvent()

void QQuickWindow::keyPressEvent ( QKeyEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 1701 of file qquickwindow.cpp.

References d, and Q_ASSERT.

Referenced by QQuickView::keyPressEvent().

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◆ keyReleaseEvent()

void QQuickWindow::keyReleaseEvent ( QKeyEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 1712 of file qquickwindow.cpp.

References d, and Q_ASSERT.

Referenced by QQuickView::keyReleaseEvent().

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◆ mouseDoubleClickEvent()

void QQuickWindow::mouseDoubleClickEvent ( QMouseEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 1769 of file qquickwindow.cpp.

References d, and Q_ASSERT.

◆ mouseMoveEvent()

void QQuickWindow::mouseMoveEvent ( QMouseEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 1759 of file qquickwindow.cpp.

References d, and Q_ASSERT.

Referenced by QQuickView::mouseMoveEvent().

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◆ mousePressEvent()

void QQuickWindow::mousePressEvent ( QMouseEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 1749 of file qquickwindow.cpp.

References d, and Q_ASSERT.

Referenced by QQuickView::mousePressEvent().

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◆ mouseReleaseEvent()

void QQuickWindow::mouseReleaseEvent ( QMouseEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 1779 of file qquickwindow.cpp.

References d, and Q_ASSERT.

Referenced by QQuickView::mouseReleaseEvent().

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◆ Q_REVISION [1/11]

QQuickWindow::Q_REVISION	(	2	,
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Q_REVISION(2, 2) void sceneGraphError(QQuickWindow QQuickWindow::Q_REVISION	(	2	,
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◆ releaseResources

void QQuickWindow::releaseResources ( )

slot

This function tries to release redundant resources currently held by the QML scene.

Calling this function requests the scene graph to release cached graphics resources, such as graphics pipeline objects, shader programs, or image data.

Additionally, depending on the render loop in use, this function may also result in the scene graph and all window-related rendering resources to be released. If this happens, the sceneGraphInvalidated() signal will be emitted, allowing users to clean up their own graphics resources. The setPersistentGraphics() and setPersistentSceneGraph() functions can be used to prevent this from happening, if handling the cleanup is not feasible in the application, at the cost of higher memory usage.

Note: The releasing of cached graphics resources, such as graphics pipelines or shader programs is not dependent on the persistency hints. The releasing of those will happen regardless of the values of the persistent graphics and scenegraph hints.; This function is not related to the QQuickItem::releaseResources() virtual function.

See also: sceneGraphInvalidated(), setPersistentGraphics(), setPersistentSceneGraph()

Definition at line 1237 of file qquickwindow.cpp.

References d, QQuickPixmap::purgeCache(), and qtquick_shadereffect_purge_gui_thread_shader_cache().

Referenced by QQuick3DRenderStats::releaseCachedResources().

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◆ resizeEvent()

void QQuickWindow::resizeEvent ( QResizeEvent * ev )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 187 of file qquickwindow.cpp.

References d.

Referenced by QQuickView::resizeEvent().

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◆ sceneGraphInitialized

void QQuickWindow::sceneGraphInitialized ( )

signal

\qmlsignal QtQuick::Window::frameSwapped()

This signal is emitted when a frame has been queued for presenting. With vertical synchronization enabled the signal is emitted at most once per vsync interval in a continuously animating scene.

This signal is emitted when the scene graph has been initialized.

This signal will be emitted from the scene graph rendering thread.

Referenced by QQuickWindowPrivate::init(), QQuickVideoOutput::itemChange(), and QQuickAnimatorProxyJob::sceneGraphInitialized().

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◆ sceneGraphInvalidated

void QQuickWindow::sceneGraphInvalidated ( )

signal

\qmlsignal QtQuick::Window::sceneGraphInitialized()

This signal is emitted when the scene graph has been invalidated.

This signal implies that the graphics rendering context used has been invalidated and all user resources tied to that context should be released.

When rendering with OpenGL, the QOpenGLContext of this window will be bound when this function is called. The only exception is if the native OpenGL has been destroyed outside Qt's control, for instance through EGL_CONTEXT_LOST.

This signal will be emitted from the scene graph rendering thread.

Referenced by QQuickWindowPrivate::init(), QQuickVideoOutput::itemChange(), QQuickParticlePainter::itemChange(), and QQuick3DItem2D::updateSpatialNode().

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◆ showEvent()

void QQuickWindow::showEvent ( QShowEvent * )

overrideprotectedvirtual

\reimp

Reimplemented from QWindow.

Definition at line 197 of file qquickwindow.cpp.

References d.

◆ update

void QQuickWindow::update ( )

slot

Schedules the window to render another frame.

Calling QQuickWindow::update() differs from QQuickItem::update() in that it always triggers a repaint, regardless of changes in the underlying scene graph or not.

Definition at line 399 of file qquickwindow.cpp.

References d, and QQuickRenderControlPrivate::get().

Referenced by QQuickAnimatorController::advance(), QQuickAnimatorController::beforeNodeSync(), QQuickItemGrabResultPrivate::create(), event(), QSGFramebufferObjectNode::scheduleRender(), QQuickRhiItemNode::scheduleUpdate(), QGraphicsScene::setBackgroundBrush(), QGraphicsScene::setForegroundBrush(), QQuick3DSGDirectRenderer::setVisibility(), and QQuickAnimatedNode::start().

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Friends And Related Symbol Documentation

◆ operator<<

QQmlInfo operator<<	(	QQmlInfo	info,
		const QQuickWindow *	window )

friend

Definition at line 238 of file qquickwindow.h.

◆ QQuickAnimatorController

friend class QQuickAnimatorController

friend

Definition at line 249 of file qquickwindow.h.

◆ QQuickDeliveryAgentPrivate

friend class QQuickDeliveryAgentPrivate

friend

Definition at line 251 of file qquickwindow.h.

◆ QQuickItem

friend class QQuickItem

friend

Definition at line 245 of file qquickwindow.h.

◆ QQuickItemPrivate

friend class QQuickItemPrivate

friend

Definition at line 246 of file qquickwindow.h.

◆ QQuickRenderControl

friend class QQuickRenderControl

friend

Definition at line 248 of file qquickwindow.h.

◆ QQuickWidget

friend class QQuickWidget

friend

Definition at line 247 of file qquickwindow.h.

◆ QQuickWidgetPrivate

friend class QQuickWidgetPrivate

friend

Definition at line 250 of file qquickwindow.h.

Property Documentation

◆ activeFocusItem

QQuickWindow::activeFocusItem

read

The item which currently has active focus or null if there is no item with active focus.

See also: QQuickItem::forceActiveFocus(), {Keyboard Focus in Qt Quick}

Definition at line 47 of file qquickwindow.h.

Referenced by QQuickWindowAttached::activeFocusItem(), QQuickPopupPrivate::prepareEnterTransition(), and QQuickWindowAttached::windowChange().

◆ color

QQuickWindow::color

readwrite

\qmlproperty color Window::color

The background color for the window.

Setting this property is more efficient than using a separate Rectangle.

Note: If you set the color to "transparent" or to a color with alpha translucency, you should also set suitable \l flags such as {flags: Qt.FramelessWindowHint}. Otherwise, window translucency may not be enabled consistently on all platforms.

The color used to clear the color buffer at the beginning of each frame.

By default, the clear color is white.

See also: setDefaultAlphaBuffer()

Definition at line 45 of file qquickwindow.h.

◆ contentItem

QQuickWindow::contentItem

read

\qmlattachedproperty Item Window::contentItem

Since: 5.4

This attached property holds the invisible root item of the scene or null if the item is not in a window. The Window attached property can be attached to any Item.

The invisible root item of the scene.

A QQuickWindow always has a single invisible root item containing all of its content. To add items to this window, reparent the items to the contentItem or to an existing item in the scene.

Definition at line 46 of file qquickwindow.h.

Referenced by QOpenXRView::QOpenXRView(), QQuickOverlay::QQuickOverlay(), QmlJSDebugger::QQuickWindowInspector::QQuickWindowInspector(), QQuickOverlay::~QQuickOverlay(), QQuickWindowQmlImpl::classBegin(), QQuickWindowAttached::contentItem(), QQuickDrawerPrivate::effectiveEdge(), QQuickPopupPrivate::finalizeExitTransition(), QQuickWidgetPrivate::handleWindowChange(), QmlJSDebugger::QQuickWindowInspector::itemsAt(), QQuickOverlay::overlay(), QWaylandQuickOutput::pickClickableItem(), QQuickMouseAreaPrivate::propagate(), QmlJSDebugger::Highlight::setItem(), QQuickWidgetPrivate::setRootObject(), QQuickDrawerPrivate::startDrag(), QmlJSDebugger::QQuickWindowInspector::topVisibleItemAt(), QQuickOverlayPrivate::updateGeometry(), and QQuickWidgetPrivate::updateSize().

The documentation for this class was generated from the following files:

qtdeclarative/src/quick/items/qquickwindow.h (bd131dcbf579f822ac8cee98324dc1355f7cd314)
qtdeclarative/src/quick/items/qquickwindow.cpp (1401b9a492c4a90a47948cbc184b90ae49e93450)

Public Slots

Signals

Protected Member Functions

Properties

Private Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QQuickWindow() [1/2]

◆ QQuickWindow() [2/2]

Member Function Documentation

◆ ~QQuickWindow()

◆ afterRendering

◆ beforeRendering

◆ beforeSynchronizing

◆ closeEvent()

◆ colorChanged

◆ event()

◆ exposeEvent()

◆ focusInEvent()

◆ focusObject()

◆ focusOutEvent()

◆ frameSwapped

◆ hideEvent()

◆ keyPressEvent()

◆ keyReleaseEvent()

◆ mouseDoubleClickEvent()

◆ mouseMoveEvent()

◆ mousePressEvent()

◆ mouseReleaseEvent()

◆ Q_REVISION [1/11]

◆ Q_REVISION [2/11]

◆ Q_REVISION [3/11]

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◆ Q_REVISION [8/11]

◆ Q_REVISION [9/11]

◆ Q_REVISION [10/11]

◆ Q_REVISION [11/11]

◆ releaseResources

◆ resizeEvent()

◆ sceneGraphInitialized

◆ sceneGraphInvalidated

◆ showEvent()

◆ update

Friends And Related Symbol Documentation

◆ operator<<

◆ QQuickAnimatorController

◆ QQuickDeliveryAgentPrivate

◆ QQuickItem

◆ QQuickItemPrivate

◆ QQuickRenderControl

◆ QQuickWidget

◆ QQuickWidgetPrivate

Property Documentation

◆ activeFocusItem

◆ color

◆ contentItem