Re: How to change the FXIcon in a FXButton at runtime?

On Sat, 16 Apr 2022 19:08:20 +0200
Pof <[email protected]> wrote:

>Dear all,
>
>In the MainWindow::MainWindow (derived from FXMainWindow):
>I create a FXButton and attach an FXIcon (icon1) to it:
>    btn = new FXButton(hframe,
>                         "",
>                         getApp()->icon1,
>                         this,ID_TRANSFORM,
>BUTTON_TOOLBAR|FRAME_RAISED|LAYOUT_CENTER_X|LAYOUT_CENTER_Y,
>                         0,0,0,0,0,0,0,0);
>
>Further on (outside the MainWindow constructor), I would like to be able 
>to change the icon (i.e. at runtime).
>Then I try:
>     btn->setIcon(getApp()->icon2);
>but this does not work, a MsgBox with "FXDCWindow:drawicon: illegal icon 
>specified" is shown, and then the program crashes.
>Any idea how to change the FXIcon in a FXButton at runtime?

Make sure the FXIcon has been created using create().

	icon->create()

This will give the icon its server-side representation, i.e. generate
the pixel data where the drawing routines can use then [the client-side
pixel buffer may often not be necessary anymore after this is done].


		-- JVZ



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