QWindow 类

QWindow class represents a window in the underlying windowing system. 更多...

Header: #include <QWindow>
qmake: QT += gui
Since: Qt 5.0
继承: QObject and QSurface
继承者:

QAbstract3DGraph , QPaintDeviceWindow ,和 QQuickWindow

公共类型

enum AncestorMode { ExcludeTransients, IncludeTransients }
enum Visibility { Windowed, Minimized, Maximized, FullScreen, AutomaticVisibility, Hidden }

特性

公共函数

QWindow (QScreen * targetScreen = Q_NULLPTR)
QWindow (QWindow * parent )
virtual ~QWindow ()
QSize baseSize () const
Qt::ScreenOrientation contentOrientation () const
void create ()
QCursor cursor () const
void destroy ()
qreal devicePixelRatio () const
QString filePath () const
Qt::WindowFlags flags () const
virtual QObject * focusObject () const
QRect frameGeometry () const
QMargins frameMargins () const
QPoint framePosition () const
QRect geometry () const
int height () const
QIcon icon () const
bool isActive () const
bool isAncestorOf (const QWindow * child , AncestorMode mode = IncludeTransients) const
bool isExposed () const
bool isModal () const
bool isTopLevel () const
bool isVisible () const
QPoint mapFromGlobal (const QPoint & pos ) const
QPoint mapToGlobal (const QPoint & pos ) const
QRegion mask () const
int maximumHeight () const
QSize maximumSize () const
int maximumWidth () const
int minimumHeight () const
QSize minimumSize () const
int minimumWidth () const
Qt::WindowModality modality () const
qreal opacity () const
QWindow * parent (AncestorMode mode ) const
QWindow * parent () const
QPoint position () const
void reportContentOrientationChange (Qt::ScreenOrientation orientation )
QSurfaceFormat requestedFormat () const
void resize (const QSize & newSize )
void resize (int w , int h )
QScreen * screen () const
void setBaseSize (const QSize & size )
void setCursor (const QCursor & cursor )
void setFilePath (const QString & filePath )
void setFlag (Qt::WindowType flag , bool on = true)
void setFlags (Qt::WindowFlags flags )
void setFormat (const QSurfaceFormat & format )
void setFramePosition (const QPoint & point )
void setGeometry (int posx , int posy , int w , int h )
void setGeometry (const QRect & rect )
void setIcon (const QIcon & icon )
bool setKeyboardGrabEnabled (bool grab )
void setMask (const QRegion & region )
void setMaximumSize (const QSize & size )
void setMinimumSize (const QSize & size )
void setModality (Qt::WindowModality modality )
bool setMouseGrabEnabled (bool grab )
void setOpacity (qreal level )
void setParent (QWindow * parent )
void setPosition (const QPoint & pt )
void setPosition (int posx , int posy )
void setScreen (QScreen * newScreen )
void setSizeIncrement (const QSize & size )
void setSurfaceType (SurfaceType surfaceType )
void setTransientParent (QWindow * parent )
void setVisibility (Visibility v )
void setWindowState (Qt::WindowState state )
QSize sizeIncrement () const
QString title () const
QWindow * transientParent () const
Qt::WindowType type () const
void unsetCursor ()
Visibility visibility () const
int width () const
WId winId () const
Qt::WindowState windowState () const
int x () const
int y () const

重实现公共函数

virtual QSurfaceFormat format () const
virtual QSize size () const
virtual SurfaceType surfaceType () const

公共槽

void alert (int msec )
bool close ()
void hide ()
void lower ()
void raise ()
void requestActivate ()
void requestUpdate ()
void setHeight (int arg )
void setMaximumHeight (int h )
void setMaximumWidth (int w )
void setMinimumHeight (int h )
void setMinimumWidth (int w )
void setTitle ( const QString & )
void setVisible (bool visible )
void setWidth (int arg )
void setX (int arg )
void setY (int arg )
void show ()
void showFullScreen ()
void showMaximized ()
void showMinimized ()
void showNormal ()

信号

void activeChanged ()
void contentOrientationChanged (Qt::ScreenOrientation orientation )
void focusObjectChanged (QObject * object )
void heightChanged (int arg )
void maximumHeightChanged (int arg )
void maximumWidthChanged (int arg )
void minimumHeightChanged (int arg )
void minimumWidthChanged (int arg )
void modalityChanged (Qt::WindowModality modality )
void opacityChanged (qreal opacity )
void screenChanged (QScreen * screen )
void visibilityChanged (QWindow::Visibility visibility )
void visibleChanged (bool arg )
void widthChanged (int arg )
void windowStateChanged (Qt::WindowState windowState )
void windowTitleChanged (const QString & title )
void xChanged (int arg )
void yChanged (int arg )

静态公共成员

QWindow * fromWinId (WId id )

保护函数

virtual void exposeEvent (QExposeEvent * ev )
virtual void focusInEvent (QFocusEvent * ev )
virtual void focusOutEvent (QFocusEvent * ev )
virtual void hideEvent (QHideEvent * ev )
virtual void keyPressEvent (QKeyEvent * ev )
virtual void keyReleaseEvent (QKeyEvent * ev )
virtual void mouseDoubleClickEvent (QMouseEvent * ev )
virtual void mouseMoveEvent (QMouseEvent * ev )
virtual void mousePressEvent (QMouseEvent * ev )
virtual void mouseReleaseEvent (QMouseEvent * ev )
virtual void moveEvent (QMoveEvent * ev )
virtual bool nativeEvent (const QByteArray & eventType , void * message , long * result )
virtual void resizeEvent (QResizeEvent * ev )
virtual void showEvent (QShowEvent * ev )
virtual void tabletEvent (QTabletEvent * ev )
virtual void touchEvent (QTouchEvent * ev )
virtual void wheelEvent (QWheelEvent * ev )

重实现保护函数

virtual bool event (QEvent * ev )

详细描述

QWindow class represents a window in the underlying windowing system.

由父级提供的窗口,将变为其父级窗口的本机子级窗口。

应用程序通常会使用 QWidget or QQuickView for its UI, and not QWindow directly. Still, it is possible to render directly to a QWindow with QBackingStore or QOpenGLContext ,当希望把依赖关系降到最低 (或想要直接使用 OpenGL) 时。 光栅窗口范例 and OpenGL 窗口范例 are useful reference examples for how to render to a QWindow using either approach.

资源管理

Windows can potentially use a lot of memory. A usual measurement is width times height times color depth. A window might also include multiple buffers to support double and triple buffering, as well as depth and stencil buffers. To release a window's memory resources, call the destroy () 函数。

内容取向

QWindow has reportContentOrientationChange () that can be used to specify the layout of the window contents in relation to the screen. The content orientation is simply a hint to the windowing system about which orientation the window contents are in. It's useful when you wish to keep the same window size, but rotate the contents instead, especially when doing rotation animations between different orientations. The windowing system might use this value to determine the layout of system popups or dialogs.

可见性和窗口系统曝光

By default, the window is not visible, and you must call setVisible (true), or show () or similar to make it visible. To make a window hidden again, call setVisible (false) or hide (). The visible property describes the state the application wants the window to be in. Depending on the underlying system, a visible window might still not be shown on the screen. It could, for instance, be covered by other opaque windows or moved outside the physical area of the screen. On windowing systems that have exposure notifications, the isExposed () accessor describes whether the window should be treated as directly visible on screen. The exposeEvent () function is called whenever the windows exposure in the windowing system changes. On windowing systems that do not make this information visible to the application, isExposed () will simply return the same value as isVisible ().

QWindow::Visibility queried through visibility () is a convenience API combining the functions of visible() and windowState ().

渲染

There are two Qt APIs that can be used to render content into a window, QBackingStore for rendering with a QPainter and flushing the contents to a window with type QSurface::RasterSurface ,和 QOpenGLContext for rendering with OpenGL to a window with type QSurface::OpenGLSurface .

The application can start rendering as soon as isExposed () 返回 true , and can keep rendering until it isExposed () 返回 false . To find out when isExposed () changes, reimplement exposeEvent (). The window will always get a resize event before the first expose event.

初始几何体

If the window's width and height are left uninitialized, the window will get a reasonable default geometry from the platform window. If the position is left uninitialized, then the platform window will allow the windowing system to position the window. For example on X11, the window manager usually does some kind of smart positioning to try to avoid having new windows completely obscure existing windows. However setGeometry () initializes both the position and the size, so if you want a fixed size but an automatic position, you should call resize () 或 setWidth () 和 setHeight () 代替。

成员类型文档编制

enum QWindow:: AncestorMode

This enum is used to control whether or not transient parents should be considered ancestors.

常量 描述
QWindow::ExcludeTransients 0 Transient parents are not considered ancestors.
QWindow::IncludeTransients 1 Transient parents are considered ancestors.

enum QWindow:: Visibility

This enum describes what part of the screen the window occupies or should occupy.

常量 描述
QWindow::Windowed 2 The window occupies part of the screen, but not necessarily the entire screen. This state will occur only on windowing systems which support showing multiple windows simultaneously. In this state it is possible for the user to move and resize the window manually, if WindowFlags permit it and if it is supported by the windowing system.
QWindow::Minimized 3 The window is reduced to an entry or icon on the task bar, dock, task list or desktop, depending on how the windowing system handles minimized windows.
QWindow::Maximized 4 The window occupies one entire screen, and the titlebar is still visible. On most windowing systems this is the state achieved by clicking the maximize button on the toolbar.
QWindow::FullScreen 5 The window occupies one entire screen, is not resizable, and there is no titlebar. On some platforms which do not support showing multiple simultaneous windows, this can be the usual visibility when the window is not hidden.
QWindow::AutomaticVisibility 1 This means to give the window a default visible state, which might be fullscreen or windowed depending on the platform. It can be given as a parameter to setVisibility but will never be read back from the visibility accessor.
QWindow::Hidden 0 The window is not visible in any way, however it may remember a latent visibility which can be restored by setting AutomaticVisibility.

该枚举在 Qt 5.1 引入或被修改。

特性文档编制

active : const bool

此特性保持窗口的活动状态

该特性在 Qt 5.1 引入。

访问函数:

bool isActive () const

通知信号:

void activeChanged ()

另请参阅 requestActivate ().

contentOrientation : Qt::ScreenOrientation

This property holds the orientation of the window's contents

This is a hint to the window manager in case it needs to display additional content like popups, dialogs, status bars, or similar in relation to the window.

The recommended orientation is QScreen::orientation () but an application doesn't have to support all possible orientations, and thus can opt to ignore the current screen orientation.

The difference between the window and the content orientation determines how much to rotate the content by. QScreen::angleBetween (), QScreen::transformBetween (),和 QScreen::mapBetween () can be used to compute the necessary transform.

默认值为 Qt::PrimaryOrientation

访问函数:

Qt::ScreenOrientation contentOrientation () const
void reportContentOrientationChange (Qt::ScreenOrientation orientation )

通知信号:

void contentOrientationChanged (Qt::ScreenOrientation orientation )

flags : Qt::WindowFlags

This property holds the window flags of the window

The window flags control the window's appearance in the windowing system, whether it's a dialog, popup, or a regular window, and whether it should have a title bar, etc.

The actual window flags might differ from the flags set with setFlags() if the requested flags could not be fulfilled.

访问函数:

Qt::WindowFlags flags () const
void setFlags (Qt::WindowFlags flags )

另请参阅 setFlag ().

height : int

This property holds the height of the window's geometry

访问函数:

int height () const
void setHeight (int arg )

通知信号:

void heightChanged (int arg )

maximumHeight : int

This property holds the maximum height of the window's geometry

访问函数:

int maximumHeight () const
void setMaximumHeight (int h )

通知信号:

void maximumHeightChanged (int arg )

maximumWidth : int

This property holds the maximum width of the window's geometry

访问函数:

int maximumWidth () const
void setMaximumWidth (int w )

通知信号:

void maximumWidthChanged (int arg )

minimumHeight : int

This property holds the minimum height of the window's geometry

访问函数:

int minimumHeight () const
void setMinimumHeight (int h )

通知信号:

void minimumHeightChanged (int arg )

minimumWidth : int

This property holds the minimum width of the window's geometry

访问函数:

int minimumWidth () const
void setMinimumWidth (int w )

通知信号:

void minimumWidthChanged (int arg )

modality : Qt::WindowModality

This property holds the modality of the window

A modal window prevents other windows from receiving input events. Qt supports two types of modality: Qt::WindowModal and Qt::ApplicationModal .

默认情况下此特性为 Qt::NonModal

访问函数:

Qt::WindowModality modality () const
void setModality (Qt::WindowModality modality )

通知信号:

void modalityChanged (Qt::WindowModality modality )

另请参阅 Qt::WindowModality .

opacity : qreal

This property holds the opacity of the window in the windowing system.

If the windowing system supports window opacity, this can be used to fade the window in and out, or to make it semitransparent.

A value of 1.0 or above is treated as fully opaque, whereas a value of 0.0 or below is treated as fully transparent. Values inbetween represent varying levels of translucency between the two extremes.

默认值为 1.0。

该特性在 Qt 5.1 引入。

访问函数:

qreal opacity () const
void setOpacity (qreal level )

通知信号:

void opacityChanged (qreal opacity )

title : QString

This property holds the window's title in the windowing system

The window title might appear in the title area of the window decorations, depending on the windowing system and the window flags. It might also be used by the windowing system to identify the window in other contexts, such as in the task switcher.

访问函数:

QString title () const
void setTitle ( const QString & )

通知信号:

void windowTitleChanged (const QString & title )

另请参阅 flags ().

visibility : Visibility

This property holds the screen-occupation state of the window

Visibility is whether the window should appear in the windowing system as normal, minimized, maximized, fullscreen or hidden.

To set the visibility to AutomaticVisibility means to give the window a default visible state, which might be fullscreen or windowed depending on the platform. When reading the visibility property you will always get the actual state, never AutomaticVisibility .

该特性在 Qt 5.1 引入。

访问函数:

Visibility visibility () const
void setVisibility (Visibility v )

通知信号:

void visibilityChanged (QWindow::Visibility visibility )

visible : bool

This property holds whether the window is visible or not

This property controls the visibility of the window in the windowing system.

By default, the window is not visible, you must call setVisible(true), or show () or similar to make it visible.

访问函数:

bool isVisible () const
void setVisible (bool visible )

通知信号:

void visibleChanged (bool arg )

另请参阅 show ().

width : int

This property holds the width of the window's geometry

访问函数:

int width () const
void setWidth (int arg )

通知信号:

void widthChanged (int arg )

x : int

This property holds the x position of the window's geometry

访问函数:

int x () const
void setX (int arg )

通知信号:

void xChanged (int arg )

y : int

This property holds the y position of the window's geometry

访问函数:

int y () const
void setY (int arg )

通知信号:

void yChanged (int arg )

成员函数文档编制

QWindow:: QWindow ( QScreen * targetScreen = Q_NULLPTR)

创建顶层窗口,在 targetScreen .

窗口不被展示直到 setVisible (true), show (), or similar is called.

另请参阅 setScreen ().

QWindow:: QWindow ( QWindow * parent )

创建窗口作为子级,为给定 parent 窗口。

窗口会被嵌入在父级窗口内,其坐标相对于父级。

屏幕继承自父级。

另请参阅 setParent ().

[virtual] QWindow:: ~QWindow ()

销毁窗口。

[slot] void QWindow:: alert ( int msec )

Causes an alert to be shown for msec miliseconds. If msec is 0 (the default), then the alert is shown indefinitely until the window becomes active again. This function has no effect on an active window.

In alert state, the window indicates that it demands attention, for example by flashing or bouncing the taskbar entry.

该函数在 Qt 5.1 引入。

QSize QWindow:: baseSize () const

返回窗口的基尺寸。

另请参阅 setBaseSize ().

[slot] bool QWindow:: close ()

关闭窗口。

This closes the window, effectively calling destroy (), and potentially quitting the application. Returns true on success, false if it has a parent window (in which case the top level window should be closed instead).

另请参阅 destroy () 和 QGuiApplication::quitOnLastWindowClosed ().

void QWindow:: create ()

Allocates the platform resources associated with the window.

It is at this point that the surface format set using setFormat () gets resolved into an actual native surface. However, the window remains hidden until setVisible () 被调用。

Note that it is not usually necessary to call this function directly, as it will be implicitly called by show (), setVisible (), and other functions that require access to the platform resources.

调用 destroy () to free the platform resources if necessary.

另请参阅 destroy ().

QCursor QWindow:: cursor () const

用于此窗口的光标形状

另请参阅 setCursor () 和 unsetCursor ().

void QWindow:: destroy ()

释放关联此窗口的本机平台资源。

另请参阅 create ().

qreal QWindow:: devicePixelRatio () const

Returns the ratio between physical pixels and device-independent pixels for the window. This value is dependent on the screen the window is on, and may change when the window is moved.

Common values are 1.0 on normal displays and 2.0 on Apple "retina" displays.

注意: For windows not backed by a platform window, meaning that create () was not called, the function will fall back to the associated QScreen 's device pixel ratio.

另请参阅 QScreen::devicePixelRatio ().

[virtual protected] bool QWindow:: event ( QEvent * ev )

重实现自 QObject::event ().

Override this to handle any event ( ev ) sent to the window. Return true if the event was recognized and processed.

Remember to call the base class version if you wish for mouse events, key events, resize events, etc to be dispatched as usual.

[virtual protected] void QWindow:: exposeEvent ( QExposeEvent * ev )

曝光事件 ( ev ) is sent by the window system whenever the window's exposure on screen changes.

应用程序可以开始渲染到窗口,采用 QBackingStore and QOpenGLContext 一旦它获得 exposeEvent(),这样 isExposed () 为 true。

若窗口被移出屏幕,使之完全被另一窗口、图标化或类似窗口所掩盖,此函数可能被调用,且值 isExposed () 可能变为 false。当这发生时,应用程序应停止其渲染,因为它对用户不再可见。

Resize (重置尺寸) 事件将始终被发送,在窗口首次被展示的曝光事件之前。

另请参阅 isExposed ().

QString QWindow:: filePath () const

表示此窗口的文件名。

另请参阅 setFilePath ().

[virtual protected] void QWindow:: focusInEvent ( QFocusEvent * ev )

覆盖此以处理聚焦入事件 ( ev ).

Focus in events are sent when the window receives keyboard focus.

另请参阅 focusOutEvent ().

[virtual] QObject *QWindow:: focusObject () const

返回 QObject that will be the final receiver of events tied focus, such as key events.

[signal] void QWindow:: focusObjectChanged ( QObject * object )

This signal is emitted when the final receiver of events tied to focus is changed to object .

另请参阅 focusObject ().

[virtual protected] void QWindow:: focusOutEvent ( QFocusEvent * ev )

覆盖此以处理聚焦出事件 ( ev ).

Focus out events are sent when the window loses keyboard focus.

另请参阅 focusInEvent ().

[virtual] QSurfaceFormat QWindow:: format () const

重实现自 QSurface::format ().

Returns the actual format of this window.

After the window has been created, this function will return the actual surface format of the window. It might differ from the requested format if the requested format could not be fulfilled by the platform. It might also be a superset, for example certain buffer sizes may be larger than requested.

注意: Depending on the platform, certain values in this surface format may still contain the requested values, that is, the values that have been passed to setFormat (). Typical examples are the OpenGL version, profile and options. These may not get updated during create () since these are context specific and a single window may be used together with multiple contexts over its lifetime. Use the QOpenGLContext 's format() instead to query such values.

另请参阅 setFormat (), create (), requestedFormat (),和 QOpenGLContext::format ().

QRect QWindow:: frameGeometry () const

Returns the geometry of the window, including its window frame.

The geometry is in relation to the virtualGeometry() of its screen.

另请参阅 geometry () 和 frameMargins ().

QMargins QWindow:: frameMargins () const

Returns the window frame margins surrounding the window.

另请参阅 geometry () 和 frameGeometry ().

QPoint QWindow:: framePosition () const

Returns the top left position of the window, including its window frame.

This returns the same value as frameGeometry (). topLeft ().

另请参阅 setFramePosition (), geometry (),和 frameGeometry ().

[static] QWindow *QWindow:: fromWinId ( WId id )

创建由另一进程 (或由使用 Qt 下本机库) 创建的窗口的本地表示。

给定句柄 id 到本机窗口,此方法创建 QWindow 对象,其可以被用于表示窗口,当援引方法像 setParent () 和 setTransientParent ().

这可以在支持它的平台上使用,以嵌入 QWindow 在本机窗口,或把本机窗口嵌入在 QWindow .

If foreign windows are not supported or embedding the native window failed in the platform plugin, this function returns 0.

注意: 结果 QWindow 不应用于操纵底层本机窗口 (除重新父级化外),或用于观察本机窗口的状态变化。对这类操作的任何支持都是偶然的,高度依赖平台且未经测试。

另请参阅 setParent () 和 setTransientParent ().

QRect QWindow:: geometry () const

Returns the geometry of the window, excluding its window frame.

The geometry is in relation to the virtualGeometry() of its screen.

另请参阅 setGeometry (), frameMargins (),和 frameGeometry ().

[slot] void QWindow:: hide ()

隐藏窗口。

相当于调用 setVisible (false).

另请参阅 show () 和 setVisible ().

[virtual protected] void QWindow:: hideEvent ( QHideEvent * ev )

Override this to handle hide events ( ev ).

The function is called when the window has requested being hidden in the windowing system.

QIcon QWindow:: icon () const

Sets the window's icon in the windowing system

另请参阅 setIcon ().

bool QWindow:: isActive () const

返回 true if the window should appear active from a style perspective.

This is the case for the window that has input focus as well as windows that are in the same parent / transient parent chain as the focus window.

To get the window that currently has focus, use QGuiApplication::focusWindow ().

注意: Getter 函数为特性 active .

bool QWindow:: isAncestorOf (const QWindow * child , AncestorMode mode = IncludeTransients) const

返回 true if the window is an ancestor of the given child 。若 mode is IncludeTransients , then transient parents are also considered ancestors.

bool QWindow:: isExposed () const

Returns if this window is exposed in the windowing system.

When the window is not exposed, it is shown by the application but it is still not showing in the windowing system, so the application should minimize rendering and other graphical activities.

An exposeEvent () is sent every time this value changes.

另请参阅 exposeEvent ().

bool QWindow:: isModal () const

Returns whether the window is modal.

A modal window prevents other windows from getting any input.

另请参阅 QWindow::modality .

bool QWindow:: isTopLevel () const

Returns whether the window is top level, i.e. has no parent window.

[virtual protected] void QWindow:: keyPressEvent ( QKeyEvent * ev )

Override this to handle key press events ( ev ).

另请参阅 keyReleaseEvent ().

[virtual protected] void QWindow:: keyReleaseEvent ( QKeyEvent * ev )

Override this to handle key release events ( ev ).

另请参阅 keyPressEvent ().

[slot] void QWindow:: lower ()

Lower the window in the windowing system.

Requests that the window be lowered to appear below other windows.

QPoint QWindow:: mapFromGlobal (const QPoint & pos ) const

翻译全局屏幕坐标 pos to window coordinates.

另请参阅 mapToGlobal ().

QPoint QWindow:: mapToGlobal (const QPoint & pos ) const

Translates the window coordinate pos 到全局屏幕坐标。例如: mapToGlobal(QPoint(0,0)) would give the global coordinates of the top-left pixel of the window.

另请参阅 mapFromGlobal ().

QRegion QWindow:: mask () const

Returns the mask set on the window.

The mask is a hint to the windowing system that the application does not want to receive mouse or touch input outside the given region.

另请参阅 setMask ().

QSize QWindow:: maximumSize () const

Returns the maximum size of the window.

另请参阅 setMaximumSize ().

QSize QWindow:: minimumSize () const

Returns the minimum size of the window.

另请参阅 setMinimumSize ().

[signal] void QWindow:: modalityChanged ( Qt::WindowModality modality )

This signal is emitted when the Qwindow::modality property changes to modality .

注意: 通知信号为特性 modality .

[virtual protected] void QWindow:: mouseDoubleClickEvent ( QMouseEvent * ev )

Override this to handle mouse double click events ( ev ).

另请参阅 mousePressEvent () 和 QStyleHints::mouseDoubleClickInterval ().

[virtual protected] void QWindow:: mouseMoveEvent ( QMouseEvent * ev )

Override this to handle mouse move events ( ev ).

[virtual protected] void QWindow:: mousePressEvent ( QMouseEvent * ev )

Override this to handle mouse press events ( ev ).

另请参阅 mouseReleaseEvent ().

[virtual protected] void QWindow:: mouseReleaseEvent ( QMouseEvent * ev )

Override this to handle mouse release events ( ev ).

另请参阅 mousePressEvent ().

[virtual protected] void QWindow:: moveEvent ( QMoveEvent * ev )

Override this to handle window move events ( ev ).

[virtual protected] bool QWindow:: nativeEvent (const QByteArray & eventType , void * message , long * result )

Override this to handle platform dependent events. Will be given eventType , message and result .

This might make your application non-portable.

Should return true only if the event was handled.

QWindow *QWindow:: parent ( AncestorMode mode ) const

Returns the parent window, if any.

mode is IncludeTransients , then the transient parent is returned if there is no parent.

A window without a parent is known as a top level window.

该函数在 Qt 5.9 引入。

另请参阅 setParent ().

QWindow *QWindow:: parent () const

Returns the parent window, if any.

A window without a parent is known as a top level window.

QPoint QWindow:: position () const

Returns the position of the window on the desktop excluding any window frame

另请参阅 setPosition ().

[slot] void QWindow:: raise ()

Raise the window in the windowing system.

Requests that the window be raised to appear above other windows.

[slot] void QWindow:: requestActivate ()

Requests the window to be activated, i.e. receive keyboard focus.

另请参阅 isActive (), QGuiApplication::focusWindow (),和 QWindowsWindowFunctions::setWindowActivationBehavior ().

[slot] void QWindow:: requestUpdate ()

Schedules a QEvent::UpdateRequest event to be delivered to this window.

The event is delivered in sync with the display vsync on platforms where this is possible. Otherwise, the event is delivered after a delay of 5 ms. The additional time is there to give the event loop a bit of idle time to gather system events, and can be overridden using the QT_QPA_UPDATE_IDLE_TIME environment variable.

When driving animations, this function should be called once after drawing has completed. Calling this function multiple times will result in a single event being delivered to the window.

Subclasses of QWindow should reimplement event (), intercept the event and call the application's rendering code, then call the base class implementation.

注意: The subclass' reimplementation of event () must invoke the base class implementation, unless it is absolutely sure that the event does not need to be handled by the base class. For example, the default implementation of this function relies on QEvent::Timer events. Filtering them away would therefore break the delivery of the update events.

该函数在 Qt 5.5 引入。

QSurfaceFormat QWindow:: requestedFormat () const

Returns the requested surface format of this window.

If the requested format was not supported by the platform implementation, the requestedFormat will differ from the actual window format.

This is the value set with setFormat ().

另请参阅 setFormat () 和 format ().

void QWindow:: resize (const QSize & newSize )

set the size of the window, excluding any window frame, to newSize

另请参阅 size () 和 geometry ().

void QWindow:: resize ( int w , int h )

set the size of the window, excluding any window frame, to a QSize constructed from width w and height h

另请参阅 size () 和 geometry ().

[virtual protected] void QWindow:: resizeEvent ( QResizeEvent * ev )

Override this to handle resize events ( ev ).

The resize event is called whenever the window is resized in the windowing system, either directly through the windowing system acknowledging a setGeometry () 或 resize () request, or indirectly through the user resizing the window manually.

QScreen *QWindow:: screen () const

返回在其中展示窗口的屏幕,或 null 若没有的话。

对于子级窗口,这返回相应顶层窗口屏幕。

另请参阅 setScreen () 和 QScreen::virtualSiblings ().

[signal] void QWindow:: 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 QWindow:: setBaseSize (const QSize & size )

Sets the base size of the window.

The base size is used to calculate a proper window size if the window defines sizeIncrement ().

另请参阅 setMinimumSize (), setMaximumSize (), setSizeIncrement (),和 baseSize ().

void QWindow:: setCursor (const QCursor & cursor )

set the cursor shape for this window

The mouse cursor will assume this shape when it is over this window, unless an override cursor is set. See the list of predefined cursor objects for a range of useful shapes.

If no cursor has been set, or after a call to unsetCursor (), the parent window's cursor is used.

By default, the cursor has the Qt::ArrowCursor shape.

Some underlying window implementations will reset the cursor if it leaves a window even if the mouse is grabbed. If you want to have a cursor set for all windows, even when outside the window, consider QGuiApplication::setOverrideCursor ().

另请参阅 cursor () 和 QGuiApplication::setOverrideCursor ().

void QWindow:: setFilePath (const QString & filePath )

set the file name this window is representing.

The windowing system might use filePath to display the path of the document this window is representing in the tile bar.

另请参阅 filePath ().

void QWindow:: setFlag ( Qt::WindowType flag , bool on = true)

设置窗口标志 flag on this window if on 为 true;否则清零标志。

该函数在 Qt 5.9 引入。

另请参阅 setFlags (), flags (),和 type ().

void QWindow:: setFormat (const QSurfaceFormat & format )

Sets the window's surface format .

The format determines properties such as color depth, alpha, depth and stencil buffer size, etc. For example, to give a window a transparent background (provided that the window system supports compositing, and provided that other content in the window does not make it opaque again):

QSurfaceFormat format;
format.setAlphaBufferSize(8);
window.setFormat(format);
							

The surface format will be resolved in the create () function. Calling this function after create () has been called will not re-resolve the surface format of the native surface.

When the format is not explicitly set via this function, the format returned by QSurfaceFormat::defaultFormat () will be used. This means that when having multiple windows, individual calls to this function can be replaced by one single call to QSurfaceFormat::setDefaultFormat () before creating the first window.

另请参阅 format (), create (), destroy (),和 QSurfaceFormat::setDefaultFormat ().

void QWindow:: setFramePosition (const QPoint & point )

Sets the upper left position of the window ( point ) including its window frame.

位置与其屏幕的 virtualGeometry() 有关。

另请参阅 framePosition (), setGeometry (),和 frameGeometry ().

void QWindow:: 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 .

The geometry is in relation to the virtualGeometry() of its screen.

另请参阅 geometry ().

void QWindow:: setGeometry (const QRect & rect )

Sets the geometry of the window, excluding its window frame, to rect .

The geometry is in relation to the virtualGeometry() of its screen.

另请参阅 geometry ().

void QWindow:: setIcon (const QIcon & icon )

Sets the window's icon in the windowing system

The window icon might be used by the windowing system for example to decorate the window, and/or in the task switcher.

另请参阅 icon ().

bool QWindow:: setKeyboardGrabEnabled ( bool grab )

Sets whether keyboard grab should be enabled or not ( grab ).

If the return value is true, the window receives all key events until setKeyboardGrabEnabled(false) is called; other windows get no key events at all. Mouse events are not affected. Use setMouseGrabEnabled () 若希望抓取。

另请参阅 setMouseGrabEnabled ().

void QWindow:: setMask (const QRegion & region )

Sets the mask of the window.

The mask is a hint to the windowing system that the application does not want to receive mouse or touch input outside the given region .

The window manager may or may not choose to display any areas of the window not included in the mask, thus it is the application's responsibility to clear to transparent the areas that are not part of the mask.

Setting the mask before the window has been created has no effect.

另请参阅 mask ().

void QWindow:: setMaximumSize (const QSize & size )

Sets the maximum size of the window.

This is a hint to the window manager to prevent resizing above the specified size .

另请参阅 setMinimumSize () 和 maximumSize ().

void QWindow:: setMinimumSize (const QSize & size )

Sets the minimum size of the window.

This is a hint to the window manager to prevent resizing below the specified size .

另请参阅 setMaximumSize () 和 minimumSize ().

bool QWindow:: setMouseGrabEnabled ( bool grab )

Sets whether mouse grab should be enabled or not ( grab ).

If the return value is true, the window receives all mouse events until setMouseGrabEnabled(false) is called; other windows get no mouse events at all. Keyboard events are not affected. Use setKeyboardGrabEnabled () 若希望抓取。

另请参阅 setKeyboardGrabEnabled ().

void QWindow:: setParent ( QWindow * parent )

设置 parent 窗口。这将导致窗口系统管理窗口的裁剪,因此,它将被裁剪到 parent 窗口。

设置 parent to be 0 will make the window become a top level window.

parent 是窗口创建通过 fromWinId (),那么当前窗口将被嵌入在 parent ,若平台支持它。

另请参阅 parent ().

void QWindow:: setPosition (const QPoint & pt )

把窗口在桌面上的位置,设为 pt

位置与其屏幕的 virtualGeometry() 有关。

另请参阅 position ().

void QWindow:: setPosition ( int posx , int posy )

把窗口在桌面上的位置,设为 posx , posy

位置与其屏幕的 virtualGeometry() 有关。

另请参阅 position ().

void QWindow:: setScreen ( QScreen * newScreen )

Sets the screen on which the window should be shown.

If the window has been created, it will be recreated on the newScreen .

注意: If the screen is part of a virtual desktop of multiple screens, the window will not move automatically to newScreen . To place the window relative to the screen, use the screen's topLeft () position.

This function only works for top level windows.

另请参阅 screen () 和 QScreen::virtualSiblings ().

void QWindow:: setSizeIncrement (const QSize & size )

Sets the size increment ( size ) of the window.

When the user resizes the window, the size will move in steps of sizeIncrement (). width () pixels horizontally and sizeIncrement (). height () pixels vertically, with baseSize () as the basis.

By default, this property contains a size with zero width and height.

The windowing system might not support size increments.

另请参阅 sizeIncrement (), setBaseSize (), setMinimumSize (),和 setMaximumSize ().

void QWindow:: setSurfaceType ( SurfaceType surfaceType )

设置 surfaceType of the window.

Specifies whether the window is meant for raster rendering with QBackingStore , or OpenGL rendering with QOpenGLContext .

surfaceType will be used when the native surface is created in the create () function. Calling this function after the native surface has been created requires calling destroy () 和 create () to release the old native surface and create a new one.

另请参阅 surfaceType (), QBackingStore , QOpenGLContext , create (),和 destroy ().

void QWindow:: setTransientParent ( QWindow * parent )

Sets the transient parent

This is a hint to the window manager that this window is a dialog or pop-up on behalf of the given window.

In order to cause the window to be centered above its transient parent by default, depending on the window manager, it may also be necessary to call setFlags () with a suitable Qt::WindowType (譬如 Qt::Dialog ).

另请参阅 transientParent () 和 parent ().

void QWindow:: setWindowState ( Qt::WindowState state )

set the screen-occupation state of the window

The window state represents whether the window appears in the windowing system as maximized, minimized, fullscreen, or normal.

The enum value Qt::WindowActive is not an accepted parameter.

另请参阅 windowState (), showNormal (), showFullScreen (), showMinimized (),和 showMaximized ().

[slot] void QWindow:: show ()

展示窗口。

这相当于调用 showFullScreen (), showMaximized (),或 showNormal (), depending on the platform's default behavior for the window type and flags.

另请参阅 showFullScreen (), showMaximized (), showNormal (), hide (), QStyleHints::showIsFullScreen (),和 flags ().

[virtual protected] void QWindow:: showEvent ( QShowEvent * ev )

Override this to handle show events ( ev ).

The function is called when the window has requested becoming visible.

If the window is successfully shown by the windowing system, this will be followed by a resize and an expose event.

[slot] void QWindow:: showFullScreen ()

Shows the window as fullscreen.

相当于调用 setWindowState ( Qt::WindowFullScreen ) and then setVisible (true)。

另请参阅 setWindowState () 和 setVisible ().

[slot] void QWindow:: showMaximized ()

Shows the window as maximized.

相当于调用 setWindowState ( Qt::WindowMaximized ) and then setVisible (true)。

另请参阅 setWindowState () 和 setVisible ().

[slot] void QWindow:: showMinimized ()

Shows the window as minimized.

相当于调用 setWindowState ( Qt::WindowMinimized ) and then setVisible (true)。

另请参阅 setWindowState () 和 setVisible ().

[slot] void QWindow:: showNormal ()

Shows the window as normal, i.e. neither maximized, minimized, nor fullscreen.

相当于调用 setWindowState ( Qt::WindowNoState ) and then setVisible (true)。

另请参阅 setWindowState () 和 setVisible ().

[virtual] QSize QWindow:: size () const

重实现自 QSurface::size ().

Returns the size of the window excluding any window frame

另请参阅 resize ().

QSize QWindow:: sizeIncrement () const

Returns the size increment of the window.

另请参阅 setSizeIncrement ().

[virtual] SurfaceType QWindow:: surfaceType () const

重实现自 QSurface::surfaceType ().

Returns the surface type of the window.

另请参阅 setSurfaceType ().

[virtual protected] void QWindow:: tabletEvent ( QTabletEvent * ev )

Override this to handle tablet press, move, and release events ( ev ).

Proximity enter and leave events are not sent to windows, they are delivered to the application instance.

[virtual protected] void QWindow:: touchEvent ( QTouchEvent * ev )

Override this to handle touch events ( ev ).

QWindow *QWindow:: transientParent () const

Returns the transient parent of the window.

另请参阅 setTransientParent () 和 parent ().

Qt::WindowType QWindow:: type () const

Returns the type of the window.

This returns the part of the window flags that represents whether the window is a dialog, tooltip, popup, regular window, etc.

另请参阅 flags () 和 setFlags ().

void QWindow:: unsetCursor ()

Restores the default arrow cursor for this window.

[virtual protected] void QWindow:: wheelEvent ( QWheelEvent * ev )

Override this to handle mouse wheel or other wheel events ( ev ).

WId QWindow:: winId () const

返回窗口的平台 ID。

对于此 ID 可能有用的平台,返回值将表示相应屏幕内的唯一窗口。

另请参阅 screen ().

Qt::WindowState QWindow:: windowState () const

窗口的屏幕占用状态

另请参阅 setWindowState ().

[signal] void QWindow:: windowStateChanged ( Qt::WindowState windowState )

此信号被发射当 windowState changes, either by being set explicitly with setWindowState (), or automatically when the user clicks one of the titlebar buttons or by other means.