On Tuesday 01 September 2009, Feng Feng wrote:
> Hello all,
>
> I have a FXToggleButton button and need to change its icon based on whether it is pressed or unpressed.
>
> Can I do it in the update function as follows?
> FXMAPFUNC(SEL_UPDATE, XXX::ID_BUTTON1, XXX::OnUpdateButton1),
>
> XXX::OnUpdateButton1(..)
> {
> if (pressed)
> button1->setIcon(icon1);
> else
> button1->setIcon(icon2);
> ...
> }
Yes, that would totally work...
If the update handler doesn't know what widget sent the SEL_UPDATE, you could also
use the ID_SETICONVALUE message and set the icon that way [its simply ignored if
the widget doesn't understand it].
The method you've chosen is optimal if the widget that issues the message is known,
however.
Small note: when your GUI starts up, only one of the two icons is liable to be set.
Thus, somewhere you may have to call create() on the other one, since the not-yet-set
icon is not referenced from the widget tree it isn't automatically created when the
widget tree is.
Cheers,
- Jeroen
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