diff options
Diffstat (limited to 'src/gui/kernel/qwindowsysteminterface.cpp')
| -rw-r--r-- | src/gui/kernel/qwindowsysteminterface.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/gui/kernel/qwindowsysteminterface.cpp b/src/gui/kernel/qwindowsysteminterface.cpp index 233c27dee7..e2087bd22f 100644 --- a/src/gui/kernel/qwindowsysteminterface.cpp +++ b/src/gui/kernel/qwindowsysteminterface.cpp @@ -303,6 +303,23 @@ QWindowSystemInterfacePrivate::ExposeEvent::ExposeEvent(QWindow *window, const Q { } +/*! \internal + Handles an expose event. + + The platform plugin sends expose events when an area of the window + is invalidated or window exposure changes. \a region is in window + local coordinates. An empty region indicates that the window is + obscured, but note that the exposed property of the QWindow will be set + based on what QPlatformWindow::isExposed() returns at the time of this call, + not based on what the region is. // FIXME: this should probably be fixed. + + The platform plugin may omit sending expose events (or send obscure + events) for windows that are on screen but where the client area is + completely covered by other windows or otherwise not visible. Expose + event consumers can then use this to disable updates for such windows. + This is required behavior on platforms where OpenGL swapbuffers stops + blocking for obscured windows (like macOS). +*/ QT_DEFINE_QPA_EVENT_HANDLER(void, handleExposeEvent, QWindow *window, const QRegion ®ion) { QWindowSystemInterfacePrivate::ExposeEvent *e = |