How to get the image of the entire form (the hidden parts, too)?
lazarus / 5-Lazarus Extra Components

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DietmarSchmidt · 2011-09-01 16:48

I have a form with a scroll bar because it is larger than the entire
screen. How can I get the form bitmap of the entire form, to say, the
non-visible parts, too?

PaintWindow: gives me only the background images, not the controls
GetFormImage: gives me only the visible part of the form
any access to tform1.canvas gives me only the visible part of the
form, too.

Does anybody have a solution?

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Avishai · 2011-09-01 17:37

The only thing I can think of is to make 2 or more images and edit
them together.

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DietmarSchmidt · 2011-09-01 20:56

After hours of work I realized that I had two problems:
1. probably a bug in the actual Lazarus version: After changing the
context of the TBitmap I have to add the following line:

Bitmap1.canvas.changed;

2. The second problem is not solved yet, but I know the problem:

The Form is larger than the screen resolution (in my case 1400x1050).
The part of the Form which is outside of 1050 of the vertical size is
always black. The PrintWindow procedure stores a bitmap of the correct
size (900x1200), but the bottom part (150 lines) are always black.

This is still a problem, I am looking for a solution.....