MODULE test_gestures ;

(*
   m2-GTK4 test - event controllers and gestures.

   Adds several gestures to a widget, checks the controller properties,
   connects a 5-argument "pressed" handler to a GtkGestureClick and emits
   the signal to verify the callback ABI.  Requires a display.
*)

FROM Gio IMPORT g_application_run, g_application_quit;
FROM GtkApplication IMPORT gtk_application_new;
FROM GtkWindow IMPORT gtk_application_window_new, gtk_window_set_child;
FROM GtkBox IMPORT gtk_box_new, gtk_box_append;
FROM GtkLabel IMPORT gtk_label_new;
FROM GtkEnums IMPORT GtkVertical, GtkHorizontal;
FROM GtkWidget IMPORT gtk_widget_add_controller;
FROM GtkEventController IMPORT gtk_event_controller_set_propagation_phase,
   gtk_event_controller_get_propagation_phase, gtk_event_controller_set_name,
   GtkPhaseBubble, gtk_event_controller_motion_new;
FROM GtkGestures IMPORT gtk_gesture_click_new, gtk_gesture_drag_new,
   gtk_gesture_swipe_new, gtk_gesture_zoom_new, gtk_gesture_rotate_new,
   gtk_gesture_pan_new, gtk_gesture_long_press_new,
   gtk_gesture_single_set_button, gtk_gesture_single_get_button;
FROM GObject IMPORT g_signal_connect_data, g_signal_emit_by_name,
   GConnectDefault;
FROM GtkUtils IMPORT Connect;
FROM SYSTEM IMPORT ADDRESS, ADR;
FROM libc IMPORT printf;

CONST
   AppId = "org.example.m2gtk4.TestGestures";

VAR
   app: ADDRESS;
   passed: BOOLEAN;
   gotN: INTEGER;
   gotX, gotY: REAL;

(* void pressed(GtkGestureClick *g, int n_press, double x, double y, gpointer u) *)
PROCEDURE OnPressed (g: ADDRESS; n_press: INTEGER; x, y: REAL; user: ADDRESS);
BEGIN
   gotN := n_press;
   gotX := x;
   gotY := y
END OnPressed;

PROCEDURE OnActivate (application: ADDRESS; data: ADDRESS);
VAR
   window, box, click, drag, swipe, zoom, rotate, pan, longpress, motion: ADDRESS;
   ex, ey: REAL;
   ok: BOOLEAN;
BEGIN
   ok := TRUE;
   gotN := 0;
   gotX := 0.0;
   gotY := 0.0;

   box := gtk_box_new(GtkVertical, 4);

   click := gtk_gesture_click_new();
   IF click = NIL THEN printf("click NIL\n"); ok := FALSE END;
   gtk_widget_add_controller(box, click);
   gtk_event_controller_set_propagation_phase(click, GtkPhaseBubble);
   IF gtk_event_controller_get_propagation_phase(click) # GtkPhaseBubble THEN
      printf("propagation phase wrong\n"); ok := FALSE
   END;
   gtk_event_controller_set_name(click, "click-1");
   gtk_gesture_single_set_button(click, 1);
   IF gtk_gesture_single_get_button(click) # 1 THEN
      printf("gesture button wrong\n"); ok := FALSE
   END;

   drag := gtk_gesture_drag_new();
   swipe := gtk_gesture_swipe_new();
   zoom := gtk_gesture_zoom_new();
   rotate := gtk_gesture_rotate_new();
   pan := gtk_gesture_pan_new(GtkHorizontal);
   longpress := gtk_gesture_long_press_new();
   motion := gtk_event_controller_motion_new();
   gtk_widget_add_controller(box, drag);
   gtk_widget_add_controller(box, swipe);
   gtk_widget_add_controller(box, zoom);
   gtk_widget_add_controller(box, rotate);
   gtk_widget_add_controller(box, pan);
   gtk_widget_add_controller(box, longpress);
   gtk_widget_add_controller(box, motion);
   IF (drag = NIL) OR (swipe = NIL) OR (zoom = NIL) OR (rotate = NIL)
      OR (pan = NIL) OR (longpress = NIL) OR (motion = NIL) THEN
      printf("a gesture is NIL\n"); ok := FALSE
   END;

   g_signal_connect_data(click, "pressed", ADR(OnPressed), NIL, NIL,
                         GConnectDefault);
   ex := 10.0;
   ey := 20.0;
   g_signal_emit_by_name(click, "pressed", 1, ex, ey);
   IF gotN # 1 THEN printf("n_press wrong\n"); ok := FALSE END;
   IF ABS(gotX - 10.0) > 0.001 THEN printf("x wrong\n"); ok := FALSE END;
   IF ABS(gotY - 20.0) > 0.001 THEN printf("y wrong\n"); ok := FALSE END;

   gtk_box_append(box, gtk_label_new("gestures"));

   window := gtk_application_window_new(application);
   gtk_window_set_child(window, box);

   passed := ok;
   g_application_quit(application)
END OnActivate;

VAR
   rc: INTEGER;
BEGIN
   passed := FALSE;
   app := gtk_application_new(AppId, 0);
   IF app = NIL THEN
      printf("test_gestures: FAIL (no app)\n");
      HALT(1)
   END;
   Connect(app, "activate", ADR(OnActivate), NIL);
   rc := g_application_run(app, 0, NIL);

   IF passed THEN
      printf("test_gestures: PASS\n");
      HALT(0)
   ELSE
      printf("test_gestures: FAIL\n");
      HALT(1)
   END
END test_gestures.