Gadgets are nothing more than a rectangular area
on the screen. In fact, you can think of a
Gadget as a basic building block for other
controls (buttons, checkboxes, etc.). In Pre-3.5
versions of Palm OS, you have to map the pen events to the gadget.
To find the bounds of a gadget you use
FrmGetObjectBounds() on the gadget and store them
in a RectangleType. For example, if you have a
gadget MainTestGadget on your MainForm you would do the following:
RectangleType rectT;
FormPtr frmP = FrmGetActiveForm();
....
FrmGetObjectBounds(frmP,
FrmGetObjectIndex(frmP, MainTestGadget), &rectT);
Now if you want to handle a pen tap in the
gadget, you would handle penDown events (and/or
penMove and penUp events), like the following:
case penDownEvent:
if(RctPtInRectangle(eventP->screenX, eventP->screenY, &rectT) {
// Do something
}
...
You need to have the call to RctPtInRectangle()
so that you can determine that the pen event is
happening inside of your gadget and not in some
other control (or a random location on the screen).
At 03:15 AM 1/23/2006, "John Rodriguez" <[EMAIL PROTECTED]> wrote:
Is there a reference or sample code for such?
I can't seem to find any, however, I find
numerous pointers to doing it for >= 3.5
Thanks.
-John
----
Tom Frauenhofer, [EMAIL PROTECTED]
Palm OS® Certified Developer
http://www.beret.com
My Blog: http://tomfrauen.blogspot.com
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