void CWsBackedUpWindow::Scroll(const TRect &aClipRect, const TPoint &aOffset,const TRect &aRect)
{
TRect winBorder=TRect(iWsWin->Size());
TRect clipRect=aClipRect;
TRect srcRect = aRect;
clipRect.Intersection(winBorder);
if (!clipRect.IsEmpty())
{ // If we have to do something (a visible part will change)
srcRect.Intersection(clipRect);
STACK_REGION regionToClear;
regionToClear.AddRect(aRect);
regionToClear.SubRect(srcRect);
regionToClear.Offset(aOffset);
ActivateGc();
iBitGc->SetClippingRect(clipRect);
iBitGc->SetDrawMode(CGraphicsContext::EDrawModeWriteAlpha);
iBitGc->CopyRect(aOffset,srcRect);
for (TInt k=0;k<regionToClear.Count();k++)
{
iBitGc->Clear(regionToClear[k]);
}
iBitGc->SetClippingRect(winBorder);
iBitGc->SetDrawMode(CGraphicsContext::EDrawModePEN);
TRegionFix<1> fixRegion(iWsWin->AbsRect());
UpdateScreen(fixRegion);
regionToClear.Close();
}
}
void CWsSpriteBase::CalcRedrawRegion(const TRegion& aSourceRegion, TRegion& aTarget) const
{
aTarget.Copy(aSourceRegion);
if (ClipSprite())
{
TPoint origin(0,0);
if(iWin)
origin = iWin->Origin();
TRect rect(iBasePos + origin + iClipOffset, iClipSize);
aTarget.ClipRect(rect);
}
aTarget.ClipRect(RootWindow()->Abs());
// Only need to draw if the region being redrawn overlaps the sprite
const TRect spriteRect(Pos(), iSize);
STACK_REGION spriteRegion;
spriteRegion.AddRect(spriteRect);
aTarget.Intersect(spriteRegion);
spriteRegion.Close();
}
//This function sets up the quick fadable region.
//It removes anything that cannot be quick faded, and schedules it to be drawn in the normal fashion.
void CWsWindow::SetFadeableRegion(const TRegion& aNewFadableRegion, const TRegion& aTop)
{
WS_ASSERT_DEBUG(iScreen, EWsPanicNoScreen);
iFadableRegion.Copy(aNewFadableRegion);
//Try to figure out if any part of iFadableRegion can be quick faded (i.e. fading applied to
//the screen without first having to redraw all visible windows intersecting the region).
if ( !iFadableRegion.IsEmpty() && iScreen->IsQuickFadeScheduled(this) )
{
if (IsTranslucent())
{
//If a window is semitransparent, then we cannot apply a quickfade to it if
//the window below is faded too.
iScreen->AddRedrawRegion(iVisibleRegion, EFalse, ERedrawAll);
iScreen->RemoveFromQuickFadeList(this);
}
else
{
iQuickFadeRegion.Intersection(iFadableRegion, aTop);
//Remove any regions not possible to quick fade from iQuickFadeRegion and
//schedule these regions for full back-front rendering instead.
STACK_REGION nonQuickFadableRegion;
for(CWsSpriteBase * sprite = iSpriteList; sprite; sprite = sprite->Next())
{
nonQuickFadableRegion.AddRect(sprite->Rect());
}
for(CWsAnim * anim = iAnimList; anim; anim = anim->Next())
{
nonQuickFadableRegion.AddRect(anim->BestRect());
}
RWsTextCursor* const cursor = CWsTop::CurrentTextCursor();
if( cursor && (cursor->Window()==this) && cursor->IsStandardCursorActive() )
{
nonQuickFadableRegion.AddRect(cursor->Rect());
}
//Any regions scheduled for fading but partly or fully covered by transparent windows above them
STACK_REGION coveredFadableRegion;
coveredFadableRegion.Copy(iFadableRegion);
coveredFadableRegion.SubRegion(iQuickFadeRegion);
nonQuickFadableRegion.Union(coveredFadableRegion);
coveredFadableRegion.Close();
nonQuickFadableRegion.Tidy();
//Remove any regions not possible to quick fade from iQuickFadeRegion
iQuickFadeRegion.SubRegion(nonQuickFadableRegion);
if (!nonQuickFadableRegion.CheckError())
{
//Schedule normal drawing (full back to front rendering) for the region not possible to quick fade
if (!nonQuickFadableRegion.IsEmpty())
{
iScreen->AddRedrawRegion(nonQuickFadableRegion, EFalse, ERedrawAll);
}
}
else
{
//Schedule normal drawing for the whole iVisibleRegion if the calculations are broken
iScreen->AddRedrawRegion(iVisibleRegion, EFalse, ERedrawAll);
}
nonQuickFadableRegion.Close();
}
}
else
{
iQuickFadeRegion.Reset();
}
}
