[Gimp-developer] connecting to update signal in uimanager

[Jordan Stinson]

Yes, this helps.
Thanks!

- Jordan

On Wed, Jul 1, 2009 at 12:41 AM, Martin Nordholts <enselic at gmail.com> wrote:

> On 07/01/2009 12:08 AM, Jordan Stinson wrote:
> > static void
> > toolbox_create_commands (GimpToolbox *toolbox,
> >                                                GimpContext *context)
> > {
> >     GimpUIManager *ui_manager = GIMP_IMAGE_DOCK (toolbox)->ui_manager;
> >     ...
> >    g_signal_connect (G_OBJECT (ui_manager), "update", G_CALLBACK
> > (toolbox_refresh_commands),
> >                 (gpointer) toolbox);
> > }
> >
> > /*Callback function*/
> > static void
> > toolbox_refresh_commands (GimpUIManager *ui_manager, gpointer data)
> > {
> >     GimpToolbox *toolbox = GIMP_TOOLBOX (data);
> >     if (toolbox)
> >         gimptoolbox_refresh_commands (toolbox);
> > }
>
> Hi,
>
> Please don't break threads by sending to just one persion, continue the
> thread on gimp-developer.
>
> The "update" signal on GimpUIManager has a parameter, as can be seen in
> app/widgets/gimpuimanager.c:
>
>   manager_signals[UPDATE] =
>     g_signal_new ("update",
>                   G_TYPE_FROM_CLASS (klass),
>                   G_SIGNAL_RUN_LAST,
>                   G_STRUCT_OFFSET (GimpUIManagerClass, update),
>                   NULL, NULL,
>                   gimp_marshal_VOID__POINTER,
>                   G_TYPE_NONE, 1,
>                   G_TYPE_POINTER);
>
> where 1, G_TYPE_POINTER means the signal has one parameter of type
> pointer. It is this parameter you get in your 'data' in your callback.
> Your callback signature shall look like it does for other clients, such
> as the tool options menu:
>
>   g_signal_connect (manager, "update",
>                     G_CALLBACK (tool_options_menu_update),
>                     (gpointer) ui_path);
>
>   // ...
>
> static void
> tool_options_menu_update (GimpUIManager *manager,
>                           gpointer       update_data,
>                           const gchar   *ui_path)
>
> I.e. you need to "make room" for the "update" signal parameter.
>
> Hope this helps,
>
>  / Martin
>
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