就业培训     下载中心     Wiki     联络 登录   注册
  1. 首页
  2. Qt 5.15.17
  3. Qt Wayland Compositor
  4. C++ 类
  5. QWaylandQuickItem

QWaylandQuickItem Class

The QWaylandQuickItem class provides a Qt Quick item representing a QWaylandView . 更多...

头： #include <QWaylandQuickItem>
qmake: QT += waylandcompositor
Since: Qt 5.8
实例化： WaylandQuickItem
继承： QQuickItem
继承者：

QWaylandQuickShellSurfaceItem

该类在 Qt 5.8 引入。

特性

公共函数

QWaylandQuickItem (QQuickItem * parent = nullptr)
virtual ~QWaylandQuickItem () override
bool allowDiscardFrontBuffer () const
QWaylandCompositor * compositor () const
bool focusOnClick () const
bool inputEventsEnabled () const
bool inputRegionContains (const QPointF & localPosition ) const
bool inputRegionContains (const QPointF & localPosition )
bool isBufferLocked () const
QPointF mapFromSurface (const QPointF & point ) const
QPointF mapToSurface (const QPointF & point ) const
QWaylandSurface::Origin origin () const
QWaylandOutput * output () const
bool paintEnabled () const
void setAllowDiscardFrontBuffer (bool discard )
void setBufferLocked (bool locked )
void setFocusOnClick (bool focus )
void setInputEventsEnabled (bool enabled )
void setOutput (QWaylandOutput * output )
void setPrimary ()
void setSizeFollowsSurface (bool sizeFollowsSurface )
void setSubsurfaceHandler ( QObject * )
void setSurface (QWaylandSurface * surface )
void setTouchEventsEnabled (bool enabled )
bool sizeFollowsSurface () const
QObject * subsurfaceHandler () const
QWaylandSurface * surface () const
bool touchEventsEnabled () const
QWaylandView * view () const

重实现公共函数

virtual QSGTextureProvider * textureProvider () const override

公共槽

void setPaintEnabled (bool paintEnabled )
virtual void takeFocus (QWaylandSeat * device = nullptr)

信号

void allowDiscardFrontBufferChanged ()
void bufferLockedChanged ()
void compositorChanged ()
void focusOnClickChanged ()
void inputEventsEnabledChanged ()
void originChanged ()
void outputChanged ()
void paintEnabledChanged ()
void sizeFollowsSurfaceChanged ()
void subsurfaceHandlerChanged ()
void surfaceChanged ()
void surfaceDestroyed ()
void touchEventsEnabledChanged ()

详细描述

When writing a QWaylandCompositor in Qt Quick, this class can be used to display a client's contents on an output device and will pass user input to the client.

特性文档编制

allowDiscardFrontBuffer : bool

By default, the item locks the current buffer until a new buffer is available and updatePaintNode () is called. Set this property to true to allow Qt to release the buffer immediately when the throttling view is no longer using it. This is useful for items that have slow update intervals.

访问函数：

bool allowDiscardFrontBuffer () const
void setAllowDiscardFrontBuffer (bool discard )

通知程序信号：

void allowDiscardFrontBufferChanged ()

bufferLocked : bool

This property holds whether the item's buffer is currently locked. As long as the buffer is locked, it will not be released and returned to the client.

默认为 false。

访问函数：

bool isBufferLocked () const
void setBufferLocked (bool locked )

通知程序信号：

void bufferLockedChanged ()

compositor : QWaylandCompositor * const

This property holds the compositor for the surface rendered by this QWaylandQuickItem .

访问函数：

QWaylandCompositor * compositor () const

通知程序信号：

void compositorChanged ()

focusOnClick : bool

This property specifies whether the QWaylandQuickItem should take focus when it is clicked or touched.

默认为 true .

访问函数：

bool focusOnClick () const
void setFocusOnClick (bool focus )

通知程序信号：

void focusOnClickChanged ()

origin : const QWaylandSurface::Origin

This property holds the origin of the QWaylandQuickItem .

访问函数：

QWaylandSurface::Origin origin () const

通知程序信号：

void originChanged ()

output : QWaylandOutput *

This property holds the output on which this item is displayed.

访问函数：

QWaylandOutput * output () const
void setOutput (QWaylandOutput * output )

通知程序信号：

void outputChanged ()

paintEnabled : bool

保持 true if the item is hidden, though the texture is still updated. As opposed to hiding the item by setting visible to false , setting this property to false will not prevent mouse or keyboard input from reaching item.

访问函数：

bool paintEnabled () const
void setPaintEnabled (bool paintEnabled )

通知程序信号：

void paintEnabledChanged ()

sizeFollowsSurface : bool

This property specifies whether the size of the item should always match the size of its surface.

默认为 true .

访问函数：

bool sizeFollowsSurface () const
void setSizeFollowsSurface (bool sizeFollowsSurface )

通知程序信号：

void sizeFollowsSurfaceChanged ()

surface : QWaylandSurface *

This property holds the surface rendered by this QWaylandQuickItem .

访问函数：

QWaylandSurface * surface () const
void setSurface (QWaylandSurface * surface )

通知程序信号：

void surfaceChanged ()

touchEventsEnabled : bool

This property holds true if touch events are forwarded to the client surface, false 否则。

访问函数：

bool touchEventsEnabled () const
void setTouchEventsEnabled (bool enabled )

通知程序信号：

void touchEventsEnabledChanged ()

成员函数文档编制

QWaylandQuickItem:: QWaylandQuickItem ( QQuickItem * parent = nullptr)

Constructs a QWaylandQuickItem with the given parent .

[signal] void QWaylandQuickItem:: surfaceDestroyed ()

This signal is emitted when the client has destroyed the wl_surface associated with the QWaylandQuickItem . The handler for this signal is expected to either destroy the QWaylandQuickItem immediately or start a close animation and then destroy the Item.

If an animation is started, bufferLocked should be set to ensure the item keeps its content until the animation finishes

另请参阅 QWaylandQuickItem::bufferLocked .

[virtual slot] void QWaylandQuickItem:: takeFocus ( QWaylandSeat * device = nullptr)

Calling this function causes the item to take the focus of the input device .

[override virtual] QWaylandQuickItem:: ~QWaylandQuickItem ()

Destroy the QWaylandQuickItem .

bool QWaylandQuickItem:: inputRegionContains (const QPointF & localPosition ) const

返回 true if the input region of this item's surface contains the position given by localPosition .

bool QWaylandQuickItem:: inputRegionContains (const QPointF & localPosition )

返回 true if the input region of this item's surface contains the position given by localPosition .

QPointF QWaylandQuickItem:: mapFromSurface (const QPointF & point ) const

Maps the given point in the Wayland surfaces's coordinate system to the equivalent point within this item's coordinate system, and returns the mapped coordinate.

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

该函数在 Qt 5.13 引入。

QPointF QWaylandQuickItem:: mapToSurface (const QPointF & point ) const

Maps the given point in this item's coordinate system to the equivalent point within the Wayland surface's coordinate system, and returns the mapped coordinate.

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

void QWaylandQuickItem:: setPrimary ()

Makes this QWaylandQuickItem 's view the primary view for the surface.

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

另请参阅 QWaylandSurface::primaryView .

[override virtual] QSGTextureProvider *QWaylandQuickItem:: textureProvider () const

重实现： QQuickItem::textureProvider () const.

Returns the texture provider of this QWaylandQuickItem .

QWaylandView *QWaylandQuickItem:: view () const

Returns the view rendered by this QWaylandQuickItem .

内容