Re: button_press_event for custom widget

[Tristan Van Berkom <tristan van berkom gmail com>]

On 15 Nov 2004 13:18:25 CET, Florian Schaefer <listbox netego de> wrote:
> Hi,
>
> I'm currently trying to write a wigedt to visualize some graphical data.
>
> The widget is inited by the following funcitons:
[...]

> static void
> gtk_spect_vis_init (GtkSpectVis *spectvis)
> {
[...]
>   widget = gtk_drawing_area_new ();
>   gtk_widget_set_events (widget, GDK_EXPOSURE_MASK
>     | GDK_BUTTON_PRESS_MASK
>     | GDK_BUTTON_RELEASE_MASK
>     | GDK_POINTER_MOTION_MASK
>     | GDK_POINTER_MOTION_HINT_MASK);
[...]
> }

Why are you creating a GtkDrawingArea ?, this widget already *is* a
drawing area, "events" on this widget come from the gdk layer from
`GTK_WIDGET(widget)->window', so usually you need to do
gtk_widget_set/add_events (widget, event_mask), in the init function:

gtk_spect_vis_init (GtkSpectVis *spectvis)
{
    GtkWidget *widget = GTK_WIDGET (spectvis);
    gtk_widget_add_events (widget, GDK_BUTTON_PRESS_MASK);
}

Cheers,
                                             -Tristan