Re: Send mouse button press event to widget??

[eminemence <mayur_kankanwadi persistent co in>]

I am creating a virtual cursor on a web page and want to simulate the left
click of the mouse button
when the user presses the enter button.
So I tried even using the gdk_event_put on the global window itself,assuming
the event would find it's 
way to the control under the cursor.
The gdk_event_put has not been successful,so what is the way to achieve
this?
--Mayur.


David NeÄas (Yeti)-2 wrote:
> On Thu, Aug 30, 2007 at 03:37:04AM -0700, eminemence wrote:
> > Am a newbie to linux gtk programming.I want trying to send the mouse
> > button
> > press event to my widget and so I tried this code:
> > Code:
> > ###########################################
> >          guint signalid = g_signal_new("button_press_event",
> >                                  G_TYPE_FUNDAMENTAL(0),
> >                                  G_SIGNAL_RUN_FIRST,
> >                                  NULL,
> >                                  NULL,
> >                                  NULL,
> >                                  NULL,
> >                                  G_TYPE_NONE,0);
> >          g_signal_emit(GTK_OBJECT(gPage),signalid,0);
> > ###########################################
> > Can someone tell me what is wrong out there?
>
> Several things:
>
> 1) g_signal_new() creates (registers) a new signal for
>    a class -- a new `type' of signal.  This is not what you
>    want, you want to emit an existing signal
>    "button-press-event" (though see below).
>
> 2) The g_signal_new() arguments are bogus, for instance if
>    you actually registered a new signal for GtkWidget, you
>    would pass GTK_TYPE_WIDGET, not G_TYPE_FUNDAMENTAL(0)
>    (which makes little sense) as the instance type, but
>    since you don't want to register a new signal, I will
>    leave this.
>
> 3) Signal is emitted with g_signal_emit() -- or rather
>    g_signal_emit_by_name() if done by code outside the
>    class:
>
>        g_signal_emit_by_name(button, "clicked");
>
>    (in practice a method to emit this signal is defined for
>    most signal one wants to emit in application code, so
>    you would use gtk_button_clicked() here).
>
> 4) Events are special and sending events is done by
>    a different functions than normal signal emission:
>    gtk_main_do_event() or gtk_widget_event().  First you
>    synthetize the event by creating it with gdk_event_new()
>    and filling the fields, then send it and free with
>    gdk_event_free().
>
> Now, forget all this because in almost all cases you think
> you need to send a synthetic an event to a widget, a better
> solution exists.  So, tell what you want to achieve.
>
> Yeti
>
> --
> http://gwyddion.net/
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