QExposeEvent Class

The QExposeEvent class contains event parameters for expose events.

This class was introduced in Qt 5.0.

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Publié le 27 décembre 2024 - Mis à jour le 27 décembre 2024

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QExposeEvent Class▲

Header: QExposeEvent
Since: Qt 5.0
CMake:

find_package(Qt6 REQUIRED COMPONENTS Gui)

target_link_libraries(mytarget PRIVATE Qt6::Gui)
qmake: QT += gui
Inherits: QEvent
Group: QExposeEvent is part of events

Detailed Description▲

Expose events are sent to windows when they move between the un-exposed and exposed states.

An exposed window is potentially visible to the user. If the window is moved off screen, is made totally obscured by another window, is minimized, or similar, an expose event is sent to the window, and isExposed() might change to false.

Expose events should not be used to paint. Handle QPaintEvent instead.

The event handler QWindow::exposeEvent() receives expose events.

Member Function Documentation▲

[explicit] QExposeEvent::QExposeEvent(const QRegion &exposeRegion)▲

Constructs an expose event for the given exposeRegion which must be in local coordinates.

const QRegion &QExposeEvent::region() const▲

Returns the window area that has been exposed. The region is given in local coordinates.

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