| The state member in GdkEventButton for the button-press/release events contains flag bits that specify which mouse button is operated and also any keyboard shift/ctrl/alt modifier bits. I have tried button-press-event on several widget types, but in all cases the modifier bit GDK_BUTTON1_MASK or GDK_BUTTON2_MASK is not set on button-press. It is however set in the button-release-event. If a mouse button is held down while pressing keys the state in GdkEventKey shows the correct GDK_BUTTON1_MASK or GDK_BUTTON2_MASK. I need to know the mouse button pressed on button-press. The program below shows this for a top window widget. static gboolean buttonpresscallback ( GtkWidget * w, GdkEventButton * event, char * data ) { printf ( " mousebuttonDOWN (x,y)=(%d,%d)state %x\n" , (int)event->x , (int)event->y , event->state ) ; return false; } static gboolean buttonreleasecallback ( GtkWidget * w, GdkEventButton * event, char * data ) { printf ( " mousebuttonUP (x,y)=(%d,%d)state %x\n" , (int)event->x , (int)event->y , event->state ) ; return false; } static gboolean keypresscallback ( GtkWidget * w, GdkEventKey *event, char * data ) { printf ( " key PRESS val=%x state=%x\n" , event->keyval , event->state ) ; return false; } static gboolean keyreleasecallback ( GtkWidget *eventbox, GdkEventKey *event, char * data ) { printf ( " key RELEASE val=%x state=%x\n" , event->keyval , event->state ) ; return false; } int main ( int argc , char * argv[] ) { gtk_init(&argc, &argv); GtkWidget * window = gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER); gtk_window_set_default_size(GTK_WINDOW(window), 250, 180); gtk_window_set_title(GTK_WINDOW(window), "Testing"); gtk_widget_add_events (window , GDK_BUTTON_PRESS_MASK ); g_signal_connect (window, "button-press-event", G_CALLBACK (buttonpresscallback), NULL ) ; gtk_widget_add_events (window, GDK_BUTTON_RELEASE_MASK ); g_signal_connect (window, "button-release-event", G_CALLBACK (buttonreleasecallback), NULL ) ; gtk_widget_add_events (window, GDK_KEY_PRESS_MASK ); g_signal_connect ( window, "key-press-event", G_CALLBACK (keypresscallback), NULL ) ; gtk_widget_add_events (window, GDK_KEY_RELEASE_MASK ); g_signal_connect ( window, "key-release-event", G_CALLBACK (keyreleasecallback), NULL ) ; g_signal_connect(window, "destroy", G_CALLBACK (gtk_main_quit), NULL); gtk_widget_show_all(window); gtk_main(); return 0; } Am I doing something wrong? I have a two-button mouse and observed that the right-mouse corresponds to GDK_BUTTON3_MASK, not GDK_BUTTON2_MASK that I expected. However, when I mistakenly pressed left and right button together I received the result GDK_BUTTON2 on button-release. Is this the way it is? What about bit mask and button correspondence for a 5-button mouse (if such animal exists in the real world)? |