Doing right-click on some widgets doesn't work

[Dov Grobgeld <dov grobgeld gmail com>]

Hello,

I'm having difficulties understanding why I can't create bindings for catching right mouse button clicks on some widgets, e.g. GtkOptionMenu and GtkFileSelectorButton. In the attached program I create two widgets, a button, and a file selector button. The button is attached to a clicked signal as well as to a gtk-button-press-event signal. In the gtk-button-press event handler I can choose the behaviour based on what button is pressed. But the same binding doesn't work for the GtkFileSelectorButton. My binding to "button-press-event" is blocked. Since the GtkFileSelectorButton responds to right click, then obviously it is setup to receive button-press events. But why doesn't it receive my handler? What am I missing?

(In my real application, a RAD environment, I would like to popup a menu for (almost) all widgets when the right mouse button is clicked. But the behaviour that the button-press-event is blocked stops me from doing that.)

Attached my sample program.

Thanks!
Dov



//======================================================================
//  why-no-event.c - Why is there no event from the option button.
//
//  Dov Grobgeld <dov grobgeld gmail com>
//  Thu May 21 19:24:40 2009
//----------------------------------------------------------------------

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

gboolean cb_button_press_event(GtkWidget      *widget,
                               GdkEventButton *event,
                               gpointer        user_data);
gboolean cb_clicked(GtkWidget      *widget,
                    gpointer        user_data);

int main(int argc, char **argv)
{
    GtkWidget *w_win, *w_box, *w_button, *w_fs_button;

    gtk_init(&argc, &argv);

    w_win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    w_box = gtk_hbox_new(FALSE, 0);
    gtk_container_add(GTK_CONTAINER(w_win), w_box);
    w_button = gtk_button_new_with_label("Press");
    gtk_box_pack_start(GTK_BOX(w_box), w_button, FALSE, FALSE, 0);
    w_fs_button = gtk_file_chooser_button_new("Select",
                                              GTK_FILE_CHOOSER_ACTION_OPEN);
    gtk_box_pack_start(GTK_BOX(w_box), w_fs_button, FALSE, FALSE, 0);
    gtk_widget_show_all(w_win);

    // Now connect the press button to both a clicked and a button-press-event
    g_signal_connect(w_button, "clicked", G_CALLBACK(cb_clicked), NULL);
    g_signal_connect(w_button, "button-press-event",
                     G_CALLBACK(cb_button_press_event), NULL);

    // Connect the file selector to catch a button-press-event on
    // the file selector button, but the binding doesn't work!
    g_signal_connect(w_fs_button, "button-press-event",
                     G_CALLBACK(cb_button_press_event), NULL);

    gtk_main();
   
   
    exit(0);
}

gboolean cb_button_press_event(GtkWidget      *widget,
                               GdkEventButton *event,
                               gpointer        user_data)
{
    printf("cb_button_press_event\n");
    if (event->button == 3) {
        printf("Got right mouse button!\n");
        return TRUE;
    }
    return FALSE;
}

gboolean cb_clicked(GtkWidget      *widget,
                    gpointer        user_data)
{
    printf("cb_clicked\n");
    return TRUE;
}