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microsoft.public.dotnet.framework.drawing

big problem with flickering on PocketPC

Adam Edell via DotNetMonster.com

1/22/2005 7:16:00 AM

Hi all, I have big problem and I'm stuck and don't know what to do..
I'm developing application for PocketPC. In application I use panel on form to scroll thru big picture(relative: picture is bigger than a screen 240 x 320) and I get flickering, even with a small puctures.
I have that form, then panel is in other class and I use

this.panel.Paint += .....

to draw on screen. In Paint class I simly call method from panel for drawing:

drawImage(Graphics graphics, Image image)
{
Graphics gx = graphics;
gx.drawImage(image,...,...);
}

Graphics object getting from parametar is function is because on CF I can't use panel.CreateGraphics(), even in MSDN they say I can.

and when scroll event happens it call function from panel class that iterate location of the lefttop window of image part and then call drawing in main form with:

this.Panel.Invalidate()

so it's call panel.Paint() function and do drawing

The point is that I get flickering anyway, I try to use double buffering technique in drawImage() method but result is the same.
On this site, I saw post that saying methog:

///remove flickering
onPaintBackground(){...}

but I don't how to use it only on panel(panel it's not inherited from System.Windows.Forms.Form)

Help !!!!!!!!!!!

marko

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