QPaintDeviceWindow Class
Convenience subclass of QWindow that is also a QPaintDevice. More...
| Header: | #include <QPaintDeviceWindow> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS Gui)target_link_libraries(mytarget PRIVATE Qt6::Gui) |
| qmake: | QT += gui |
| Inherits: | QWindow and QPaintDevice |
| Inherited By: |
Public Functions
Public Slots
| void | update() |
Reimplemented Protected Functions
| virtual void | paintEvent(QPaintEvent *event) override |
Detailed Description
QPaintDeviceWindow is like a regular QWindow, with the added functionality of being a paint device too. Whenever the content needs to be updated, the virtual paintEvent() function is called. Subclasses, that reimplement this function, can then simply open a QPainter on the window.
Note: This class cannot directly be used in applications. It rather serves as a base for subclasses like QOpenGLWindow.
See also QOpenGLWindow.
Member Function Documentation
[override virtual protected] void QPaintDeviceWindow::paintEvent(QPaintEvent *event)
Reimplements: QWindow::paintEvent(QPaintEvent *ev).
Handles paint events passed in the event parameter.
The default implementation does nothing. Reimplement this function to perform painting. If necessary, the dirty area is retrievable from the event.
[slot] void QPaintDeviceWindow::update()
Marks the entire window as dirty and schedules a repaint.
Note: Subsequent calls to this function before the next paint event will get ignored.
Note: For non-exposed windows the update is deferred until the window becomes exposed again.
void QPaintDeviceWindow::update(const QRect &rect)
Marks the rect of the window as dirty and schedules a repaint.
Note: Subsequent calls to this function before the next paint event will get ignored, but rect is added to the region to update.
Note: For non-exposed windows the update is deferred until the window becomes exposed again.
void QPaintDeviceWindow::update(const QRegion ®ion)
Marks the region of the window as dirty and schedules a repaint.
Note: Subsequent calls to this function before the next paint event will get ignored, but region is added to the region to update.
Note: For non-exposed windows the update is deferred until the window becomes exposed again.