gtk signals and exiting program with using them

Question

how can i use gtk signal for exiting a window and then a diolog message showed that questions that Are you sure? and by clicking in Yes button it closes all of windows? this is my code :

void show_queExit(GtkWidget *widget, gpointer window) { GtkWidget *dialog; dialog = gtk_message_dialog_new(GTK_WINDOW(window), GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO, "Are you sure to exit?"); gtk_window_set_title(GTK_WINDOW(dialog), "Exit"); gint result = gtk_dialog_run (GTK_DIALOG (dialog)); if (result==GTK_RESPONSE_YES) { g_signal_connect(G_OBJECT(window), "destroy",G_CALLBACK(gtk_main_quit),NULL); gtk_widget_destroy (dialog); printf("\n***\n"); } else gtk_widget_destroy (dialog); }

and this is my main function: int main(int argc, char **argv) {

 gtk_init(&argc, &argv); GtkWidget *window; GtkToolItem *exitIcon; GtkWidget *toolbar; window = gtk_window_new(GTK_WINDOW_TOPLEVEL); toolbar = gtk_toolbar_new(); gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_ICONS); exitIcon = gtk_tool_button_new_from_stock(GTK_STOCK_QUIT); gtk_toolbar_insert(GTK_TOOLBAR(toolbar), exitIcon, -1); gtk_window_set_default_size(GTK_WINDOW(window), win_width, win_height); gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER); g_signal_connect(G_OBJECT(exitIcon), "clicked",G_CALLBACK(gtk_main_quit), NULL); g_signal_connect(G_OBJECT(window), "destroy",G_CALLBACK(gtk_main_quit), NULL); gtk_widget_show_all(window); gtk_main(); return 0; }

It's not totally clear what you want but I'm guessing you'd like to add a handler to "delete-event" signal of the toplevel window, and show your dialog from that handler. — Jussi Kukkonen
– Jussi Kukkonen, Commented Jan 17, 2014 at 9:22
excuse me because of my bad english.yes i want to do so.how can i do? — user3204018
– user3204018, Commented Jan 20, 2014 at 12:50

Jussi Kukkonen · Accepted Answer · 2014-01-20 14:30:14Z

Somethign like this:

static gboolean on_delete_event (GtkWidget *window, GdkEvent *event, gpointer data) { GtkWidget *dialog; int answer; dialog = gtk_message_dialog_new (GTK_WINDOW(window), GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO, "Are you sure to exit?"); gtk_window_set_title (GTK_WINDOW(dialog), "Exit"); answer = gtk_dialog_run (GTK_DIALOG (dialog)); gtk_widget_destroy (dialog); if (answer == GTK_RESPONSE_YES) { g_print ("Yes\n"); return FALSE; } else { g_print ("No\n"); return TRUE; } }

Then in main() or some initialization function:

g_signal_connect (window, "delete-event", G_CALLBACK (on_delete_event), NULL);

There are several ways to handle the app exit -- you could just call gtk_main_quit() from the function above, or you can do what I think you tried originally: let GTK destroy the window when user clicks YES, and call gtk_main_quit() from the destroy signal handler.

In any case connecting the exit icon "clicked" signal to gtk_main_quit() is wrong if you want the dialog to come up: You should connect the signal to a function that you write that calls gtk_window_close().

g_signal_connect (exitIcon, "clicked", G_CALLBACK (on_exit_clicked), window);

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