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OrbWorks Community Forum • View topic - Forms & Buffers
Page 1 of 1

PostPosted: Fri Apr 12, 2002 12:17 am
by Robin Hamilton-Pennell
I have been having trouble with this for some time and am wondering what stupid mistake I am making, so any help would be appreciated.

Basically, I load a resource form that is used a a "browser" for images. I have it go through a list of different images just fine and load the image into a custom buffer:

Fctl(LOAD,3000); //Editor
Fctl(LOAD,3100); //Small dialog
Fctl(LOAD,3200); //"Browser"

Fctl(DRAW,3200);
// event loop here eventually calls the following buffer functions:
FreeBuf(1);
CustomBuf(1,bw,bh);
SetDrawBuf(1);
FastBmp(0,0,ind);
SetDrawBuf(0);

Now, here is where my problem is. I try to switch from a smaller form to a larger one (3100 to 3000) using Fctl(DRAW,3000); and then copy the bitmap to the screen. This works great, but then, after trapping the pen x and y coordinates with Fevent and redrawing the bitmap to the screen from the buffer, the bitmap copies to the screen using the coordinate system from the smaller window! To make a (very) long story short, after the user taps the pen down, the entire bitmap and coordinate system shifts down to the bottom of the screen.

If anyone understood this, and has any ideas, please share them... I really would appreciate the help!!

Robin

PostPosted: Fri Apr 12, 2002 12:58 am
by jstadolnik
The current coordinate scheme is always anchored to the upper-left hand corner of the current active form/dialog. This is just the way the palmOS works. It's not a bug. See the second sentence of the Dialog() function documentation... this will give you an idea to why it works this way.

Joe

The PToolboxLib guy.
http://www.geocities.com/retro_01775/PToolboxLib.htm

Edited by - jstadolnik on 04/11/2002 20:02:11