/** mousegrab.c **/
#include <gnome.h>

gint eventDelete(GtkWidget *widget,
        GdkEvent *event,gpointer data);
gint eventDestroy(GtkWidget *widget,
        GdkEvent *event,gpointer data);
void grabMouse(GtkWidget *widget,GtkWidget *containWidget);
void ungrabMouse(GtkWidget *widget,gpointer data);

int main(int argc,char *argv[])
{
    GtkWidget *window;
    GtkWidget *box;
    GtkWidget *button;

    gnome_init("mousegrab","1.0",argc,argv);
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_container_set_border_width(
            GTK_CONTAINER(window),30);
    gtk_signal_connect(GTK_OBJECT(window),"delete_event",
            GTK_SIGNAL_FUNC(eventDelete),NULL);
    gtk_signal_connect(GTK_OBJECT(window),"destroy",
            GTK_SIGNAL_FUNC(eventDestroy),NULL);

    box = gtk_vbox_new(FALSE,0);

    button = gtk_button_new_with_label("Grab Mouse");
    gtk_box_pack_start(GTK_BOX(box),button,FALSE,FALSE,0);
    gtk_signal_connect(GTK_OBJECT(button),"clicked",
            GTK_SIGNAL_FUNC(grabMouse),window);
    
    button = gtk_button_new_with_label("Ungrab Mouse");
    gtk_box_pack_end(GTK_BOX(box),button,FALSE,FALSE,0);
    gtk_signal_connect(GTK_OBJECT(button),"clicked",
            GTK_SIGNAL_FUNC(ungrabMouse),NULL);

    gtk_container_add(GTK_CONTAINER(window),box);
    gtk_widget_show_all(window);
    gtk_main();
    exit(0);
}
void grabMouse(GtkWidget *widget,GtkWidget *containWidget)
{
    GdkWindow *window = containWidget->window;
    GdkCursor *cursor = gdk_cursor_new(GDK_CROSSHAIR);
    gdk_pointer_grab(window,
            TRUE,
            (GdkEventMask)0,
            window,
            cursor,
            GDK_CURRENT_TIME);
}
void ungrabMouse(GtkWidget *widget,gpointer data) {
    if(gdk_pointer_is_grabbed())
        gdk_pointer_ungrab(GDK_CURRENT_TIME);
}

gint eventDelete(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    return(FALSE);
}
gint eventDestroy(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    if(gdk_pointer_is_grabbed())
        gdk_pointer_ungrab(GDK_CURRENT_TIME);
    gtk_main_quit();
    return(0);
}