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Windows QPA: Send synthesized expose events when window shrinks.

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Fix the condition to check for plain move events and gain in
one dimension in which case Windows will send events.

Task-number: QTBUG-51038
Change-Id: I60433657f37275ee302f745291e79e465d52064d
Reviewed-by: Błażej Szczygieł <spaz16@wp.pl>
Reviewed-by: Shawn Rutledge <shawn.rutledge@theqtcompany.com>
This commit is contained in:
Friedemann Kleint 2016-02-11 09:48:06 +01:00
parent b8f89d8ef3
commit 20a29fbfe8
1 changed files with 3 additions and 1 deletions
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4
src/plugins/platforms/windows/qwindowswindow.cpp
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@ -1467,7 +1467,9 @@ void QWindowsWindow::handleGeometryChange()
// QTBUG-32121: OpenGL/normal windows (with exception of ANGLE) do not receive
// expose events when shrinking, synthesize.
if (!testFlag(OpenGL_ES2) && isExposed()
&& !(m_data.geometry.width() >= previousGeometry.width() || m_data.geometry.height() >= previousGeometry.height())) {
&& m_data.geometry.size() != previousGeometry.size() // Exclude plain move
// One dimension grew -> Windows will send expose, no need to synthesize.
&& !(m_data.geometry.width() > previousGeometry.width() || m_data.geometry.height() > previousGeometry.height())) {
fireExpose(QRect(QPoint(0, 0), m_data.geometry.size()), true);
}
if (previousGeometry.topLeft() != m_data.geometry.topLeft()) {