QPaintEngineState 类提供活动描绘引擎当前状态的有关信息。 更多...
| 头： | #include <QPaintEngineState> |
| qmake: | QT += gui |
| Since: | Qt 4.1 |
该类在 Qt 4.1 引入。
注意： 此类的所有函数 可重入 .
| QBrush | backgroundBrush () const |
| Qt::BGMode | backgroundMode () const |
| QBrush | brush () const |
| bool | brushNeedsResolving () const |
| QPointF | brushOrigin () const |
| Qt::ClipOperation | clipOperation () const |
| QPainterPath | clipPath () const |
| QRegion | clipRegion () const |
| QPainter::CompositionMode | compositionMode () const |
| QFont | font () const |
| bool | isClipEnabled () const |
| qreal | opacity () const |
| QPainter * | painter () const |
| QPen | pen () const |
| bool | penNeedsResolving () const |
| QPainter::RenderHints | renderHints () const |
| QPaintEngine::DirtyFlags | state () const |
| QTransform | transform () const |
QPaintEngineState records which properties that have changed since the last time the paint engine was updated, as well as their current value.
Which properties that have changed can at any time be retrieved using the state () function. This function returns an instance of the QPaintEngine::DirtyFlags type which stores an OR combination of QPaintEngine::DirtyFlag values. The QPaintEngine::DirtyFlag enum defines whether a property has changed since the last update or not.
If a property is marked with a dirty flag, its current value can be retrieved using the corresponding get function:
The QPaintEngineState class also provide the painter () function which returns a pointer to the painter that is currently updating the paint engine.
An instance of this class, representing the current state of the active paint engine, is passed as argument to the QPaintEngine::updateState () function. The only situation in which you will have to use this class directly is when implementing your own paint engine.
另请参阅 QPaintEngine .
Returns the background brush in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyBackground 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns the background mode in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyBackgroundMode 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns the brush in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyBrush 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns whether the coordinate of the fill have been specified as bounded by the current rendering operation and have to be resolved (about the currently rendered primitive).
该函数在 Qt 4.3 引入。
Returns the brush origin in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyBrushOrigin 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns the clip operation in the current paint engine state.
This variable should only be used when the state () returns a combination which includes either the QPaintEngine::DirtyClipPath 或 QPaintEngine::DirtyClipRegion 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns the clip path in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyClipPath 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns the clip region in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyClipRegion 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns the composition mode in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyCompositionMode 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns the font in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyFont 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns whether clipping is enabled or not in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyClipEnabled 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns the opacity in the current paint engine state.
该函数在 Qt 4.2 引入。
Returns a pointer to the painter currently updating the paint engine.
Returns the pen in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyPen 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns whether the coordinate of the stroke have been specified as bounded by the current rendering operation and have to be resolved (about the currently rendered primitive).
该函数在 Qt 4.3 引入。
Returns the render hints in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyHints 标志。
另请参阅 state () 和 QPaintEngine::updateState ().
Returns a combination of flags identifying the set of properties that need to be updated when updating the paint engine's state (i.e. during a call to the QPaintEngine::updateState () 函数)。
另请参阅 QPaintEngine::updateState ().
Returns the matrix in the current paint engine state.
This variable should only be used when the state () returns a combination which includes the QPaintEngine::DirtyTransform 标志。
该函数在 Qt 4.3 引入。
另请参阅 state () 和 QPaintEngine::updateState ().
