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QPaintEngineState Class Reference
[Модуль QtGui]

The QPaintEngineState class provides information about the active paint engine's current state. Далее...

 #include <QPaintEngineState>

Замечание: Все функции в этом классе реентерабельны.

This class was introduced in Qt 4.1.

• Список всех членов, включая унаследованные
• Устаревшие члены

Открытые функции

Подробное описание

The QPaintEngineState class provides information about the active paint engine's current state.

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.

See also QPaintEngine.

Описание функций-членов

QBrush QPaintEngineState::backgroundBrush () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

Qt::BGMode QPaintEngineState::backgroundMode () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

QBrush QPaintEngineState::brush () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

bool QPaintEngineState::brushNeedsResolving () const

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).

Эта функция была введена в Qt 4.3.

QPointF QPaintEngineState::brushOrigin () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

Qt::ClipOperation QPaintEngineState::clipOperation () const

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 or the QPaintEngine::DirtyClipRegion flag.

Смотрите также state() и QPaintEngine::updateState().

QPainterPath QPaintEngineState::clipPath () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

QRegion QPaintEngineState::clipRegion () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

QPainter::CompositionMode QPaintEngineState::compositionMode () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

QFont QPaintEngineState::font () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

bool QPaintEngineState::isClipEnabled () const

Returns wether 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 flag.

Смотрите также state() и QPaintEngine::updateState().

qreal QPaintEngineState::opacity () const

Returns the opacity in the current paint engine state.

Эта функция была введена в Qt 4.2.

QPainter * QPaintEngineState::painter () const

Returns a pointer to the painter currently updating the paint engine.

QPen QPaintEngineState::pen () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

bool QPaintEngineState::penNeedsResolving () const

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).

Эта функция была введена в Qt 4.3.

QPainter::RenderHints QPaintEngineState::renderHints () const

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 flag.

Смотрите также state() и QPaintEngine::updateState().

QPaintEngine::DirtyFlags QPaintEngineState::state () const

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() function).

See also QPaintEngine::updateState().

QTransform QPaintEngineState::transform () const

Возвращает матрицу в текущем состоянии механизма рисования.

Эта переменная должна использоваться только когда state() возвратит комбинацию, которая включает в себя флаг QPaintEngine::DirtyTransform.

Эта функция была введена в Qt 4.3.

Смотрите также state() и QPaintEngine::updateState().