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Fix handling of empty clipping region in wxQt

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This commit is contained in:
Jay Nabonne
2019-01-21 12:35:55 +00:00
committed by Vadim Zeitlin
parent 5b8b30d243
commit 5929c5831e
1 changed files with 8 additions and 4 deletions
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12
src/qt/dc.cpp
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@@ -435,10 +435,14 @@ void wxQtDCImpl::DoSetClippingRegion(wxCoord x, wxCoord y,
// Set internal state for getters
/* Note: Qt states that QPainter::clipRegion() may be slow, so we
* keep the region manually, which should be faster */
if ( m_clipping )
m_clippingRegion.Union( wxRect( x, y, width, height ) );
else
m_clippingRegion.Intersect( wxRect( x, y, width, height ) );
if ( !m_clipping || m_clippingRegion.IsEmpty() )
{
int dcwidth, dcheight;
DoGetSize(&dcwidth, &dcheight);
m_clippingRegion = wxRegion(0, 0, dcwidth, dcheight);
}
m_clippingRegion.Intersect( wxRect(x, y, width, height) );
wxRect clipRect = m_clippingRegion.GetBox();