GTK+ Forums

jain1982 · Familiar Face Joined: 25 Aug 2008 Posts: 15

Hi All,

I am having a problem in creating the pop-up menu. I have writtten the following code for getting a pop-up menu when user presses a mouse button on top-level window:

#include <stdio.h>
#include <assert.h>
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <gdk/gdkkeysyms.h>

gboolean Show_photo(GtkWidget *widget, GdkEventButton *event)
{
if (event->type == GDK_BUTTON_PRESS && event->button == 3)
{
GdkEventButton *bevent = (GdkEventButton *) event;
gtk_menu_popup (GTK_MENU(widget), NULL, NULL, NULL, NULL,
bevent->button, bevent->time);

return TRUE;
}
return FALSE;
}

int
main(int argc, char* argv[])
{
GtkWidget* top_level_window;
GtkWidget* file_menu;
GtkWidget* open_item;
GtkWidget* save_item;
GtkWidget* quit_item;

gtk_init(&argc, &argv);

top_level_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_size_request (top_level_window, 800,650);

file_menu = gtk_menu_new (); /* Don't need to show menus */

/* Create the menu items */
open_item = gtk_menu_item_new_with_label ("Open");
save_item = gtk_menu_item_new_with_label ("Save");
quit_item = gtk_menu_item_new_with_label ("Quit");

/* Add them to the menu */
gtk_menu_append (GTK_MENU (file_menu), open_item);
gtk_menu_append (GTK_MENU (file_menu), save_item);
gtk_menu_append (GTK_MENU (file_menu), quit_item);

gtk_widget_show (open_item);
gtk_widget_show (save_item);
gtk_widget_show (quit_item);

g_signal_connect_swapped (G_OBJECT(top_level_window),
"button-press-event",
G_CALLBACK (Show_photo),
G_OBJECT(file_menu));

gtk_widget_show_all (top_level_window);

gtk_main ();

return 0;
}

But when i do press the button, i do not see any pop-up menu. However, top level window is their.

Can anybody help me put why i am not getting the pop-up window.
This is the test application, but my objective is to right click a photo thumbnail and then i get the pop-up menu with options like rotate left, rotate right, delete, slideshow etc...

Please help me where i am wrong and provide me the solution.

Thanks in advance to all.

With Regards,
Deepak

dreblen · Posted: Mon Aug 25, 2008 3:07 pm Post subject:

you were on the right track, it's just that GtkWindow can't catch the button-press-event by itself,
you need to use something that does accept it, like a GtkEventBox
http://library.gnome.org/devel/gtk/stable/GtkEventBox.html

Here's a working example with a few comments:

Code: (C)

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#include <stdio.h>
#include <assert.h>
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <gdk/gdkkeysyms.h>

/* even if you don't use the user_data argument, it should still be there */
gboolean Show_photo(GtkWidget *widget, GdkEventButton *event, gpointer user_data)
{
if (event->type == GDK_BUTTON_PRESS && event->button == 3)
{
/* event is already a GdkEventButton, so this is not necessary */
//GdkEventButton *bevent = (GdkEventButton *) event;
gtk_menu_popup (GTK_MENU(widget), NULL, NULL, NULL, NULL,
event->button, event->time);

return TRUE;
}
return FALSE;
}

int
main(int argc, char* argv[])
{
GtkWidget* top_level_window;
GtkWidget *eb;
GtkWidget* file_menu;
GtkWidget* open_item;
GtkWidget* save_item;
GtkWidget* quit_item;

gtk_init(&argc, &argv);

top_level_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
/* connect this so that we can quit */
g_signal_connect(G_OBJECT(top_level_window), "delete-event", G_CALLBACK(gtk_main_quit), NULL);
gtk_widget_set_size_request (top_level_window, 800,650);

file_menu = gtk_menu_new (); /* Don't need to show menus */

/* Create the menu items */
open_item = gtk_menu_item_new_with_label ("Open");
save_item = gtk_menu_item_new_with_label ("Save");
quit_item = gtk_menu_item_new_with_label ("Quit");

/* Add them to the menu */
gtk_menu_append (GTK_MENU (file_menu), open_item);
gtk_menu_append (GTK_MENU (file_menu), save_item);
gtk_menu_append (GTK_MENU (file_menu), quit_item);

gtk_widget_show (open_item);
gtk_widget_show (save_item);
gtk_widget_show (quit_item);

/* create a GtkEventBox to catch the signal */
eb = gtk_event_box_new();
gtk_container_add(GTK_CONTAINER(top_level_window), eb);
gtk_widget_show(eb);
g_signal_connect_swapped ( G_OBJECT(eb),
"button-press-event",
G_CALLBACK (Show_photo),
G_OBJECT(file_menu));

gtk_widget_show_all (top_level_window);

gtk_main ();

return 0;
}

jain1982 · Familiar Face Joined: 25 Aug 2008 Posts: 15

Hey thanks for the reply, its working.

Also i want to know that do we can get po-up meuns on GtkImage??

ramesh · GTK+ Guru Joined: 16 Nov 2006 Posts: 173 Location: INDIA

dreblen · Posted: Tue Aug 26, 2008 3:07 pm Post subject:

while using several GtkImages and GtkEventBoxes will work, it would be better to use a GtkIconView
http://library.gnome.org/devel/gtk/stable/GtkIconView.html
if you know how to use GtkTreeViews, then using an icon view will be simple, if you don't know how to use tree views,
then this tutorial will help you greatly:
http://scentric.net/tutorial/treeview-tutorial.html
and here's an example of an icon view that reads images from a directory and puts them in an icon view (post 4):
http://gtkforums.com/viewtopic.php?t=1576