Re: gtk_widget_event()

[Havoc Pennington <hp redhat com>]

Allin Cottrell <cottrell wfu edu> writes:
> I'm trying to make a double-click on certain locations
> equivalent to clicking the "OK" button in a window.

The easiest way to do this is to just call gtk_widget_activate() on
the button. It won't animate though.

> I gather the right thing is to construct an appropriate GdkEvent
> and pass it to gtk_widget_event() along with a pointer to the OK
> button.  But I'm having trouble getting the event right.  Can
> anyone tell me legitimate values for the "state" and "button"
> fields in the GdkEventButton struct?
> 
> Specifically, I've got as far as making the OK button look
> pressed momentarily by double-clicking, but the callback is
> failing to invoke the "click" event for the button and I suspect
> that's because my artificial event isn't quite right.
> 

To simulate a single click, you need to send two events,
GDK_BUTTON_PRESS and GDK_BUTTON_RELEASE. "state" should be the active
modifiers, which you can get by calling gdk_window_get_pointer() (just
pass NULL for x/y since you don't care about them). Reminds me that we
should add gdk_get_keyboard_state() or something. "button" is 1 for
left button, 2 for middle, 3 for right.

To fully simulate an event's normal behavior, call gtk_main_do_event()
instead of gtk_widget_event(); then the event is potentially
propagated to multiple widgets as it normally would be.

To do a double click you have to add another BUTTON_PRESS and a
2BUTTON_PRESS. My book gives the order to send the events in the GDK
chapter someplace.

Havoc