>-----Original Message-----
>From: Mike Davis [mailto:[EMAIL PROTECTED]]
>Sent: Friday, June 02, 2000 12:52 PM
>To: Palm Developer Forum
>Subject: Re: Refreshing without erasing a form
>
>
>>
>> > I am handling the frmUpdateEvent to redraw my form after returning
>> > from a dialog form. My problem is the form now blinks when it is
>> > erased and then redrawn.
>>
>> if you don't erase and redraw the whole form in your frmUpdateEvent
>> branch, it shouldn't happen - at least it doesn't with me. normally
>> you only have to do that when responding to update code zero.
>
>I'm not sure what is going on but when I use FrmDrawForm in my
>frmUpdate handler my fields blink. First the come back blank, then
>they are drawn, then they are blank again, then redrawn again.
>
>If I use FldDrawForm and CtlDrawControl for each field and control
>instead of FrmDrawForm, they do not blink. I have tried various
>codes for FrmUpdateForm without any change.
>
>The question I have with this method is that I also have a bitmap
>that also needs to be redrawn and I'm not sure how to force a bitmap
>to be drawn. Currently I let the form take care of that but how
>would I specify and force the redrawing of the bitmap?
>
The only way I can think offhand of doing that is to save the
bitmap and redraw it. If it were drawn in it's own separate window,
it might be a little cleaner to refresh it. You can use BmpDelete
and BmpCreate, calling BmpGetBits & BmpBitsSize first to get the data
bits from it, and BmpGetColorTable & BmpColortableSize and BmpSize to
get the colortable and sizes. (Or maybe use ColorTableEntries macro)
Store that information, delete the bitmap, then recreate it with that
information. (I don't know if this will work, I haven't really tried
it...I usually just delete the bitmap object, then redraw it from a
resource file, and not on the fly)
-Rus
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