Gtk delete_event handler problem

Tommassino · 05-07-2007, 05:00 AM

hi i am new to gtk programming, i am trying to make a "delete-event" signal handler, which would show a dialog with typical "Are you sure you want to quit?" but this only works for as a handler for button ("clicked" signal) i have on my program but not for above mentioned "delete_event" signal.when i am testing it as a "clicked" handler it works without problem but for a "delete_events" it shows these errors

Quote:

(foobar-sample:31870): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkDialog'

(foobar-sample:31870): Gtk-CRITICAL **: gtk_dialog_run: assertion `GTK_IS_DIALOG (dialog)' failed

this is my sorce code please try and try toadvice me

Quote:

#include <stdio.h>
#include <gtk/gtk.h>

/* Our new improved callback. The data passed to this function
* is printed to stdout. */
static gint run_dialog( GtkWidget *widget,
gpointer data )
{
gint result;
GtkWidget *dialog;
dialog=(GtkWidget *)data;
result=gtk_dialog_run(GTK_DIALOG(dialog));
switch(result){
case GTK_RESPONSE_ACCEPT:
printf("Answer YES\n");
gtk_main_quit();
gtk_widget_hide(dialog);
return FALSE;
break;
case GTK_RESPONSE_REJECT:
printf("Answer NO\n");
gtk_widget_hide(dialog);
return TRUE;
break;
}

}
int main( int argc,
char *argv[] )
{

GtkWidget *window;
GtkWidget *button;
GtkWidget *dialog;

gtk_init (&argc, &argv);

window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), "Hello Buttons!");
gtk_window_set_default_size(GTK_WINDOW(window),320,240);
g_signal_connect(G_OBJECT(window),"delete_event",G_CALLBACK(run_dialog),dialog);

dialog = gtk_dialog_new_with_buttons ("My dialog",
NULL,
GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_STOCK_OK,
GTK_RESPONSE_ACCEPT,
GTK_STOCK_CANCEL,
GTK_RESPONSE_REJECT,
NULL);

button=gtk_button_new_with_label("

");
g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(run_dialog),(gpointer) dialog);
gtk_container_add(GTK_CONTAINER(window),button);
gtk_widget_show(button);
gtk_widget_show(window);
gtk_main ();

return 0;
}

MicahCarrick · 06-06-2007, 07:42 PM

A demonstration of using the "delete-event" to show a quit confirmation dialog is here:
Confirm quit using dialog on the "delete-event"