void wxQtDCImpl::DoSetClippingRegion(wxCoord x, wxCoord y,
wxCoord width, wxCoord height)
{
// Special case: Empty region -> DestroyClippingRegion()
if ( width == 0 && height == 0 )
{
DestroyClippingRegion();
}
else
{
if (m_qtPainter->isActive())
{
// Set QPainter clipping (intersection if not the first one)
m_qtPainter->setClipRect( x, y, width, height,
m_clipping ? Qt::IntersectClip : Qt::ReplaceClip );
}
// 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 ) );
wxRect clipRect = m_clippingRegion->GetBox();
m_clipX1 = clipRect.GetLeft();
m_clipX2 = clipRect.GetRight();
m_clipY1 = clipRect.GetTop();
m_clipY2 = clipRect.GetBottom();
m_clipping = true;
}
}
void wxQtDCImpl::DoSetClippingRegion(wxCoord x, wxCoord y,
wxCoord width, wxCoord height)
{
// Special case: Empty region -> DestroyClippingRegion()
if ( width == 0 && height == 0 )
{
DestroyClippingRegion();
}
else
{
if ( width < 0 )
{
width = -width;
x -= width - 1;
}
if ( height < 0 )
{
height = -height;
y -= height - 1;
}
if (m_qtPainter->isActive())
{
// Set QPainter clipping (intersection if not the first one)
m_qtPainter->setClipRect( x, y, width, height,
m_clipping ? Qt::IntersectClip : Qt::ReplaceClip );
}
// 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.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();
m_clipX1 = clipRect.GetLeft();
m_clipX2 = clipRect.GetRight() + 1;
m_clipY1 = clipRect.GetTop();
m_clipY2 = clipRect.GetBottom() + 1;
m_clipping = true;
}
}
void wxQtDCImpl::DoSetDeviceClippingRegion(const wxRegion& region)
{
if ( region.IsEmpty() )
{
DestroyClippingRegion();
}
else
{
QRegion qregion = region.GetHandle();
// Save current origin / scale (logical coordinates)
QTransform qtrans = m_qtPainter->worldTransform();
// Reset transofrmation to match device coordinates
m_qtPainter->setWorldTransform( QTransform() );
wxLogDebug(wxT("wxQtDCImpl::DoSetDeviceClippingRegion rect %d %d %d %d"),
qregion.boundingRect().x(), qregion.boundingRect().y(),
qregion.boundingRect().width(), qregion.boundingRect().height());
// Set QPainter clipping (intersection if not the first one)
m_qtPainter->setClipRegion( qregion,
m_clipping ? Qt::IntersectClip : Qt::ReplaceClip );
// Restore the transformation (translation / scale):
m_qtPainter->setWorldTransform( qtrans );
// 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( region );
else
m_clippingRegion->Intersect( region );
wxRect clipRect = m_clippingRegion->GetBox();
m_clipX1 = clipRect.GetLeft();
m_clipX2 = clipRect.GetRight();
m_clipY1 = clipRect.GetTop();
m_clipY2 = clipRect.GetBottom();
m_clipping = true;
}
}
