void wxWindowMGL::HandlePaint(MGLDevCtx *dc)
{
if ( IsFrozen() )
{
// Don't paint anything if the window is frozen.
m_refreshAfterThaw = true;
return;
}
#if wxDEBUG_LEVEL >= 2
// FIXME_MGL -- debugging stuff, to be removed!
static int debugPaintEvents = -1;
if ( debugPaintEvents == -1 )
debugPaintEvents = wxGetEnv(wxT("WXMGL_DEBUG_PAINT_EVENTS"), NULL);
if ( debugPaintEvents )
{
dc->setColorRGB(255,0,255);
dc->fillRect(-1000,-1000,2000,2000);
wxMilliSleep(50);
}
#endif // wxDEBUG_LEVEL >= 2
MGLRegion clip;
dc->getClipRegion(clip);
m_updateRegion = wxRegion(clip);
m_paintMGLDC = dc;
#if wxUSE_CARET
// must hide caret temporarily, otherwise we'd get rendering artifacts
wxCaret *caret = GetCaret();
if ( caret )
caret->Hide();
#endif // wxUSE_CARET
if ( m_eraseBackground != 0 )
{
wxWindowDC dc((wxWindow*)this);
wxEraseEvent eventEr(m_windowId, &dc);
eventEr.SetEventObject(this);
HandleWindowEvent(eventEr);
}
m_eraseBackground = -1;
wxNcPaintEvent eventNc(GetId());
eventNc.SetEventObject(this);
HandleWindowEvent(eventNc);
wxPaintEvent eventPt(GetId());
eventPt.SetEventObject(this);
HandleWindowEvent(eventPt);
#if wxUSE_CARET
if ( caret )
caret->Show();
#endif // wxUSE_CARET
m_paintMGLDC = NULL;
m_updateRegion.Clear();
}
void wxWindowDFB::PaintWindow(const wxRect& rect)
{
wxCHECK_RET( !IsFrozen() && IsShown(), "shouldn't be called" );
wxLogTrace(TRACE_PAINT,
"%p ('%s'): painting region [%i,%i,%i,%i]",
this, GetName().c_str(),
rect.x, rect.y, rect.GetRight(), rect.GetBottom());
m_updateRegion = rect;
// FIXME_DFB: don't waste time rendering the area if it's fully covered
// by some children, go directly to rendering the children
// (unless some child has HasTransparentBackground()=true!)
// NB: unconditionally send wxEraseEvent, because our implementation of
// wxWindow::Refresh() ignores the eraseBack argument
wxWindowDC dc((wxWindow*)this);
wxEraseEvent eventEr(m_windowId, &dc);
eventEr.SetEventObject(this);
HandleWindowEvent(eventEr);
wxRect clientRect(GetClientRect());
// only send wxNcPaintEvent if drawing at least part of nonclient area:
if ( !clientRect.Contains(rect) )
{
wxNcPaintEvent eventNc(GetId());
eventNc.SetEventObject(this);
HandleWindowEvent(eventNc);
}
else
{
wxLogTrace(TRACE_PAINT, "%p ('%s'): not sending wxNcPaintEvent",
this, GetName().c_str());
}
// only send wxPaintEvent if drawing at least part of client area:
if ( rect.Intersects(clientRect) )
{
wxPaintEvent eventPt(GetId());
eventPt.SetEventObject(this);
HandleWindowEvent(eventPt);
}
else
{
wxLogTrace(TRACE_PAINT, "%p ('%s'): not sending wxPaintEvent",
this, GetName().c_str());
}
// draw window's overlays on top of the painted window, if we have any:
PaintOverlays(rect);
m_updateRegion.Clear();
// client area portion of 'rect':
wxRect rectClientOnly(rect);
rectClientOnly.Intersect(clientRect);
// paint the children:
wxPoint origin = GetClientAreaOrigin();
wxWindowList& children = GetChildren();
for ( wxWindowList::iterator i = children.begin();
i != children.end(); ++i )
{
wxWindow *child = *i;
if ( child->IsFrozen() || !child->IsShown() )
continue; // don't paint anything if the window is frozen or hidden
// compute child's area to repaint
wxRect childrect(child->GetRect());
childrect.Offset(origin);
if ( child->CanBeOutsideClientArea() )
childrect.Intersect(rect);
else
childrect.Intersect(rectClientOnly);
if ( childrect.IsEmpty() )
continue;
// and repaint it:
childrect.Offset(-child->GetPosition());
childrect.Offset(-origin);
child->PaintWindow(childrect);
}
}