In article <8914@palm-dev-forum>, David Fedor <[EMAIL PROTECTED]> wrote:
> >The Palm OS Reference says to use FrmHideObject and FrmShowObject (in
> >certain cases) in the description of FrmSetTitle.
>
>
> The docs are wrong about this; I have already told the writers about this
> bug and they'll correct it the next time they open up that chapter.
>
> In fact, FrmHideObject and FrmShowObject don't know anything about the
> title object, so they're no-ops, even if you do guess the right index for
> the title object. Their code looks to see what sort of object they're
> being told to show or hide, and there's no case in the switch statements
> for frmTitleObjects.
>
> And the form will draw its title in FrmDrawForm regardless. So the short
> answer is that forms don't support hiding their titles.
>
> -David Fedor
> Palm Developer Support
Thanks for clearing this up. Is there a better (or even supported) way to
work around the graphical artefacts in changing the title with a string of
a different length. I currently use the following function to change the
title. Are there better ways?
Remo Hofer
void FormUpdateTitle(FormPtr formPtr, CharPtr s, Boolean copy) {
Boolean visible;
if (FrmGetObjectType(formPtr, 0) == frmTitleObj) {
visible = FrmVisible(formPtr);
// since the work around with FrmHideObject, FrmShowObject doesn't
// work, we can skip it.
// if (visible) FrmHideObject(formPtr, 0);
if (copy) FrmCopyTitle(formPtr, s); else FrmSetTitle(formPtr, s);
// if (visible) FrmShowObject(formPtr, 0);
// this work around is not as elegant, but it works at least
if (visible) {
RectangleType rect;
FrmGetFormBounds(formPtr, &rect);
rect.extent.y = 14; // just erase the top of the form
WinEraseRectangle(&rect , 0);
FrmUpdateForm(FrmGetFormId(formPtr) , frmRedrawUpdateCode);
}
}
}
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Remo <[EMAIL PROTECTED]> / / / /
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