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OrbWorks Community Forum • View topic - Draw.text doesn't initially display

Draw.text doesn't initially display

Discuss OrbForms Designer and PocketC Architect

Postby FrankG on Tue Feb 11, 2003 8:40 pm

Here's some curious behavior I ran into:

Off of a load event of a form, I simulated a table by drawing several rows of text in clrText with after having set text color to something nice (but not too showy). When the screen drew itself, the text drawings were not visible. I did the usual draw.attach, begin, etc. but nothing.

This occurred on my Clie NX70V, OS5. It works fine on the Palm emulator (IIIc OS4 ROM). When I ran it on the Clie OS5 simulator, I saw the text very briefly and then it disappeared as the screen painted.

So to get around it, I did a timer(0) in the form .onopen event handler and called my draw routine in the .ontimer handler and viola (spelling?) the draw.text text appears with no problem.

Curious but whew!

Frank
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Postby dewey on Tue Feb 11, 2003 9:57 pm

You cannot do any drawing in the onopen handlers, or outside of a Draw.begin and Draw.end. You should do the drawing in ondraw handler or in the ontimer (like you've done), or in response to some other events like UIButton.onselect.

The next version will display an error in the debug runtime when you try to draw at the wrong time. I've made this mistake myself several times.
dewey
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Postby FrankG on Wed Feb 12, 2003 12:57 am

>You cannot do any drawing in the onopen handlers, or outside of a
>Draw.begin and Draw.end. You should do the drawing in ondraw handler
> or in the ontimer (like you've done), or in response to some other
> events like UIButton.onselect.

Jeremy,

Thank you for that note. I guess the ondraw handler should have been a clue :oops:. Good to know about not being able to use the onload. There're a lot of things to keep ones eyes on!

Thanks,
Frank
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