Problem: redraw to the screen outside of applications framework

[paipeng]

Hello,

I am trying to draw texts and images without using coecontrol (outside of standard UI).

here I am using the WIKI code for doing it:
http://wiki.forum.nokia.com/index.ph...tion_framework
http://wiki.forum.nokia.com/index.ph...ndow_server%3F

But I have problem with Redraw function.

the Window can't be cleared when I call the following code in Draw() function:

(Draw() function is called before set RedrawReady(&iStatus)

  iGc->Activate(*iWindow);
  TRect DrwRect(TPoint(0,0), TSize(175, 80));
  iWindow->BeginRedraw();
  iGc->Clear(DrwRect);
......
  iWindow->EndRedraw();
  iGc->Deactivate();
  iSession->Flush();

But if I use

  iWindow->SetVisible(EFalse);
  iWindow->SetVisible(ETrue);
  iSession->Flush();

,then the screen is cleared and updated.


My question is, how to clear a TRect of a window in Draw() function here?


Thanks in advanced

Regards,


Pai

[paipeng]

Hello,


I have noticed now, the problem exists only for a transparency background colour.


I am using TRgb::SetAlpha(1) to set the background color with black, and in this way I can get a transparency background.

But the CWindowGc::Clear() doesn't work well for transparency colour.


Regards,


Pai

[oracle3]

Hello,


I have noticed now, the problem exists only for a transparency background colour.


I am using TRgb::SetAlpha(1) to set the background color with black, and in this way I can get a transparency background.

But the CWindowGc::Clear() doesn't work well for transparency colour.


Regards,


Pai

if u set the pen to null pen, SetAlpha() function will not have any effect.

i.e

TRgb col2 = KRgbYellow;
col2.SetAlpha(75);
gc.SetBrushColor(col2);
gc.SetPenStyle(CGraphicsContext::ENullPen);
gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
gc.DrawRect(rect);

then, when u clear the screen, try set pen and/or brush to solid,
and see if it helps. frankly, that's just my idea, haven't try at all.