Re: Window Visibility Signal
Kevin DeKorte wrote: What Signal is issued when a window becomes visible or invisible. Say I have a window and other window covers it up, is there signal that is emitted or if a window is uncovered? You'll recieve expose-event whenever X needs to redraw a widget, I think that in cases where the window is actualy presented (like with `gtk_window_present()') you'll recieve focus-in-event on the toplevel. Cheers, -Tristan ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Window Visibility Signal
On Monday 25 July 2005 12:22 pm, Tristan Van Berkom wrote: Kevin DeKorte wrote: What Signal is issued when a window becomes visible or invisible. Say I have a window and other window covers it up, is there signal that is emitted or if a window is uncovered? You'll recieve expose-event whenever X needs to redraw a widget, I think that in cases where the window is actualy presented (like with `gtk_window_present()') you'll recieve focus-in-event on the toplevel. Tristan, Expose is no problem, but what about when it is hid? basically I want to know when the window is hid, so I don't draw to it. Kevin ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Window Visibility Signal
Hello, Expose is no problem, but what about when it is hid? basically I want to know when the window is hid, so I don't draw to it. If you only want to check if a widget is visible or not at a particular time, you'll need to check for the 'visible' property of the widget. Moreover, 'expose' signal is called for both the cases (show and hide). If you choose to go the 'expose' way then connect your handler using g_signal_connect_after(). -- Regards, Zeeshan Ali ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Window Visibility Signal
On Monday 25 July 2005 12:38 pm, Zeeshan Ali wrote: Hello, Expose is no problem, but what about when it is hid? basically I want to know when the window is hid, so I don't draw to it. If you only want to check if a widget is visible or not at a particular time, you'll need to check for the 'visible' property of the widget. Moreover, 'expose' signal is called for both the cases (show and hide). If you choose to go the 'expose' way then connect your handler using g_signal_connect_after(). Nice tip, but unfortunately the expose event does not signal when the object is covered up. Only when revealed. I even hooked event and event-after and nothing was emitted when I covered up the window. Only events were triggered when I moved the mouse into the window and out of it and clicks. The code is doing the following... Runs an external process in a thread and what I want is that when the window is covered up, I want to pause the external process (I can do this via a pipe). When the window is revealed I want the external process to continue on. Which I then can send it another signal via the pipe. So the code is not a loop while it is paused. So I can't check at a regular interval to wake it up. I was hoping I could get signals to tell me when the window was revealed or not so that I could pause for example when a screen saver is kicked off. Or someone switches to another window because something more important came up. Kevin ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Window Visibility Signal
Hello, Nice tip, but unfortunately the expose event does not signal when the object is covered up. Only when revealed. I even hooked event and event-after and nothing was emitted when I covered up the window. Only events were triggered when I moved the mouse into the window and out of it and clicks. Try visibility-notify-event and try all the other (likely) signals of GtkWidget documented in the gtk+ reference manual please if this doens't work either. Regards, Zeeshan Ali ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Window Visibility Signal
On Mon, Jul 25, 2005 at 01:57:02PM -0600, Kevin DeKorte wrote:
Nice tip, but unfortunately the expose event does not signal when the object
is covered up. Only when revealed. I even hooked event and event-after
and nothing was emitted when I covered up the window. Only events were
triggered when I moved the mouse into the window and out of it and clicks.
I'm not following this thread closely, so I'm sorry if
I missed something, but have you tried visibility-notify-event
signal? See attached example.
Yeti
--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
===
#include gtk/gtk.h
static gboolean
visibility(GtkWidget *widget,
GdkEventVisibility *event)
{
static const gchar *visibility_names[] = {
Fully visible, Partially obscured, Fully obscured,
};
g_printerr(%s (%p) visibility state: %s\n,
g_type_name(G_TYPE_FROM_INSTANCE(widget)), widget,
visibility_names[event-state]);
return FALSE;
}
int
main(int argc, char *argv[])
{
GtkWidget *window;
gtk_init(argc, argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_widget_add_events(window, GDK_VISIBILITY_NOTIFY_MASK);
g_signal_connect(window, destroy, G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(window, visibility-notify-event,
G_CALLBACK(visibility), NULL);
gtk_window_set_default_size(GTK_WINDOW(window), 320, 240);
gtk_widget_show_all(window);
gtk_main();
return 0;
}
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Re: Window Visibility Signal
Kevin DeKorte wrote: [...] Nice tip, but unfortunately the expose event does not signal when the object is covered up. Only when revealed. I even hooked event and event-after and nothing was emitted when I covered up the window. Only events were triggered when I moved the mouse into the window and out of it and clicks. I found what your looking for :) http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#GtkWidget-visibility-notify-event http://developer.gnome.org/doc/API/2.0/gdk/gdk-Event-Structures.html#GdkEventVisibility http://developer.gnome.org/doc/API/2.0/gdk/gdk-Event-Structures.html#GdkVisibilityState Cheers, -Tristan ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Window Visibility Signal
On Monday 25 July 2005 02:11 pm, David Necas (Yeti) wrote: On Mon, Jul 25, 2005 at 01:57:02PM -0600, Kevin DeKorte wrote: Nice tip, but unfortunately the expose event does not signal when the object is covered up. Only when revealed. I even hooked event and event-after and nothing was emitted when I covered up the window. Only events were triggered when I moved the mouse into the window and out of it and clicks. I'm not following this thread closely, so I'm sorry if I missed something, but have you tried visibility-notify-event signal? See attached example. Ah! sample code is good... had been trying the visibility-notify-event, but it didn't work then I saw the add_events call and I went ... doh! Added that and it works almost how I want it, is there another event I should be looking for as well? Switching desktops and minimizing does not seem to pop the event, but this is pretty close. Covering up the window does work.. Kevin ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
