[new mini-widget] hbox vs viewport




Perhaps I lead you off in the wrong direction when I suggested
using a viewport. It is really meant for a different purpose
(scrolling a child window), and has some problems when
used for the purpose of simply adding a X window for event handling.
The big one is that it doesn't handle geometry propagation correctly
in this context. So it's probably better to write a new widget
just to handle this.

In fact, since it seemed like a generally useful thing, I did just
that by hacking out the unnecessary stuff from GtkViewport, and adding
in the necessary geometry propagation stuff. It's a lot simpler than
the viewport widget.

I called the resulting widget, GtkEventBox. (though I don't really
like the name, feel free to change it.) I've included it and a
test program below. It's use is pretty straightforward:

  eventbox = gtk_eventbox_new ();
  gtk_container_add(GTK_CONTAINER(window),eventbox);
  gtk_widget_show(eventbox);

  gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);
  gtk_signal_connect (GTK_OBJECT(eventbox), "button_press_event",
		      GTK_SIGNAL_FUNC(hello), NULL);
  
  label = gtk_label_new("Click here!");
  gtk_container_add(GTK_CONTAINER(eventbox),label);
  gtk_widget_show(label);

Hope this helps,
                                        Owen

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end





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