I couldn't understand the meaning of serializeEvent.
But still I simply tried the following in the socket source callback from GLib.
GdkEvent event;
memset(&event, 0, sizeof(GdkEvent));
event.key.type = GDK_KEY_PRESS;
event.key.keyval = GDK_Tab;
event.key.send_event = TRUE;
gdk_threads_enter();
printf("Sending Tab event to gtk_idle_add_full\n");
gtk_idle_add_full(G_PRIORITY_DEFAULT, (GSourceFunc)gtk_main_do_event, NULL, &event, NULL);
gdk_threads_leave();
This also lead to the same behaviour. The WebKit Gtk main window freezed from responding for further events.
I also tried replacing gtk_idle_add_full with g_idle_add_full. Still same behaviour.
Please help me if i'm missing something.
Kind regards,
Bharath
On Mon, Jul 12, 2010 at 12:33 PM, Andy Stewart <lazycat.manatee@xxxxxxxxx> wrote:
Hi Bharathwaaj,
I'm a developer of gtk2hs (Haskell binding to gtk+).
I have fix same problem (WebKit widget and GdkEvent) at Haskell side.
(https://patch-tag.com/r/AndyStewart/gtk-serialized-event/snapshot/current/content/pretty/Graphics/UI/Gtk/Gdk/SerializedEvent.hsc)
This is screenshot : http://farm5.static.flickr.com/4080/4758242386_5230d3d54d_b.jpg
Though i use Haskell, but i can explain how to pass GdkEvent from one
process to another.
Below are step:
1) Serialize GdkEvent at *server* process.
2) Then send SerializeEvent over the network
3) When *client* process receive SerializeEvent from network, re-build
GdkEvent.
4) Then you can use gtk_main_do_event propagate same event on current
focus widget, or use gtk_widget_event propagate event on specify widget.
Only trick is you need use idle_add_full wrap gtk_main_do_event to make
sure gtk_main_do_event running in *main thread* and not *listen event
thread*.
Hope above will help you. :)
Cheers,
-- Andy
> _______________________________________________
Bharathwaaj Srinivasan <bharathwaaj.s@xxxxxxxxx> writes:
> Hi,
>
> Is it possible to send GdkEvents to a GtkWidget from the application?
>
> Currently I've a GIOChannel which is listening to a socket and the GSource is attached to the Glib
> main loop.
>
> g_type_init();
> g_thread_init(NULL);
> gdk_threads_init();
> gdk_threads_enter();
> gtk_init(NULL, NULL);
>
> channel = g_io_channel_unix_new (fd);
> g_io_channel_set_encoding (channel, NULL, NULL);
> g_io_channel_set_buffered (channel, FALSE);
>
> source = g_io_create_watch (channel, G_IO_IN);
> g_source_set_priority (source, G_PRIORITY_DEFAULT);
> g_source_set_can_recurse (source, TRUE);
> g_source_set_callback (source, (GSourceFunc) event_handler, NULL, NULL);
> g_source_attach (source, NULL);
>
> g_source_unref (source);
> g_io_channel_unref(channel);
>
> gtk_main();
> gdk_threads_leave();
>
> GdkEvents (Keyboard events) are passed from say another process by writing to the socket fd.
>
> Glib calls the callback "event_handler" for data available to read. The event_handler callback reads
> the GdkEvent passed by
> another process and calls gtk_main_do_event to pass the event to the widget.
>
> But this doesn't work and the application freezes.
>
> I use gdk_threads_enter and gdk_threads_leave in the callback and before gtk_main for making gtk
> thread aware as the
> callback comes from Glib.
>
> Kindly help me in providing a mechanism to pass GdkEvents from the top. If this is not possible,
> please explain why.
>
> The main purpose for which I need this is I'm using GtkWebKit and I send Tab key event to make the
> focus move to the next
> element in the Webview.
>
> Events are being fed from another process.
>
> Kind regards,
> Bharath
>
> gtk-list mailing list
> gtk-list@xxxxxxxxx
> http://mail.gnome.org/mailman/listinfo/gtk-list
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