Coloring Disappearing 2

[BobbaFet]

I have made an application (this is just for fun) which starts out with a colored for with a shape in the middle (a + or x, /, \, -, |, or a dot) then it gets all the coordinates surrounding this shape and randomly colors x of them and then it gets the new surrounding pixel coords and selects x of them to color for x times, which works just great, BUT (there just has to be one hasnt there when something pops up over the form all the coloring disappears.
Now my question is how can I prevent this from happening?

Heres the line I use to color the pixels:

Form1.Canvas.Pixels[X,Y] := clBlack;

The rest all just getting the coords and randomly selecting X of them to color black.

Any hints or tips are most welcome as I am puzzled to why that is.

BobbaFet

Everyone has a right to my opinion.
Great Delphi Websites faq102-5352

 

[Glenn9999]

when something pops up over the form all the coloring disappears. Now my question is how can I prevent this from happening?"

If my memory serves me correctly you have to tie code to the "OnPaint" event of your form to redraw the screen in the event a form is placed over it.

 

[BobbaFet]

And how would I do that? Can you give me a small example please? You mean the line I posted above should be in the OnPaint event?

BobbaFet

Everyone has a right to my opinion.
Great Delphi Websites faq102-5352

 

[Stretchwickster]

The code you wish to be permanent needs to be called from within the Form1's OnPaint event.

Check this out for more of an explanation:

http://delphi.about.com/library/bluc/text/uc052102d.htm

Clive
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"To err is human, but to really foul things up you need a computer."
Paul Ehrlich
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To get the best answers from this forum see: faq102-5096

 

[BobbaFet]

Thanks for the info guys! Stars for the both of you!

BobbaFet

Everyone has a right to my opinion.
Great Delphi Websites faq102-5352