Graphics Bitmap load ??? need help

[Robert Alvarez]

Need help in GRAPHICS.

Want to load a bitmap to a graphics window. I have used a sample from PB and modified it. I will want to display up to four gaphics windows in one dialog window with bitmaps but I am having a hard time understanding the simple graphic steps to just display a bitmap on one window.

I have attached the modified program.

Read several forum articles but could find a match to what I was looking for.

[Dale Yarker]

Replace
GRAPHIC BITMAP LOAD
with
GRAPHIC RENDER

GRAPHIC BITMAP LOAD loads image into memory, not into the graphic control.

Cheers,

[Robert Alvarez]

Made change and still no image

This is the graphic window in PBMAIN
    CONTROL ADD GRAPHIC, hDlg, %IDC_GW2, "",255,255,200,200 

Changed lines in MainDlgProc() :
            GRAPHIC RENDER "TESTPIC2.BMP",(255,255)-(200,200)
            GRAPHIC ATTACH CBHNDL, %IDC_GW2, REDRAW

[Petr Schreiber jr]

Hi Robert,

the reason why it isn't drawing is "bad coordinates" in my opinion.
You specify target coordinates in global dialog coordinate system, but when working with graphic, just use its local coordinates.

That means - you created both GRAPHIC controls as 200x200, positioned somewhere. Ignore position, use width, height ( just with zero start, unless going for scaling ).

If you want to render image to IDC_GW2, use this:

            GRAPHIC ATTACH CBHNDL, %IDC_GW2, REDRAW
              GRAPHIC RENDER "TESTPIC2.BMP",(0,0)-(199,199)
            GRAPHIC REDRAW

- First line attaches graphic for drawing, your code first drawed and then attached
- Second line renders whole image to fit rectangle (0,0)-(199,199)
- Last line updates the control

If you dislike starting from zero, you can use following, alternatively:

            GRAPHIC ATTACH CBHNDL, %IDC_GW2, REDRAW
              GRAPHIC SCALE (1, 1)-(200, 200)
              GRAPHIC RENDER "TESTPIC2.BMP",(1,1)-(200,200)
            GRAPHIC REDRAW

Maybe it would be safer to supply image using full path, to retrieve path of your program, see this topic with AppPath function.


Bye,
Petr

[Robert Alvarez]

"bad coordinates" was the problem along with changing to RENDER.

Thanks Petr and Dale