Re: Changing a GtkToolButton icon_widget on the fly

[James Morris <jwm art net gmail com>]

On 22 June 2011 05:43, James <jamessteward optusnet com au> wrote:
> Hi,
>
> I've been trying to change the icon_widget that's displayed for a
> toolbar button while the main window is displayed.  I can't seem to get
> the actual image to change, although the functions that call
> gtk_tool_button_set_icon_widget(0 do get called.  There's no warnings
> either.
>
> I do something like...
>
> GtkWidget *eject_widget;
> GtkWidget *eject_red_widget;
> GtkToolButton *eject_button;
>
> void green(void)
> {
>        gtk_tool_button_set_icon_widget(eject_button, eject_widget);
> }
>
> void red(void)
> {
>        gtk_tool_button_set_icon_widget(eject_button, eject_red_widget);
> }
>
>
> int main(int argc, char **argv)
> {
> <snip>
>        GtkBuilder *builder;
>
>        builder = gtk_builder_new();
>        gtk_builder_add_from_file(builder, "stridemaster.xml", NULL);
>
>        eject_widget = GTK_WIDGET(gtk_builder_get_object(builder,
> "eject_tracker_image"));
>        eject_red_widget = GTK_WIDGET(gtk_builder_get_object(builder,
> "eject_tracker_red_image"));
>        eject_button = GTK_TOOL_BUTTON(gtk_builder_get_object(builder,
> "toolbutton_eject_tracker"));
>
>        g_object_unref(G_OBJECT(builder));
>
>        gtk_widget_show(window);
>
>        gtk_main();
>
> <snip>
> }
>
> What am I missing?

The problem might be to do with floating versus fixed references. GTK
will usually unreference the images once it thinks they're finished
with - ie when you change the icon, it will think you no longer wish
to use the previous icon.

Try calling g_object_ref_sink on all of the widget icons once you've
created them, and then g_object_unref after you're done.

James.


> Regards,
> James.
>
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