[five-or-more/arnaudb/use-event-controllers: 5/7] Use GestureMultiPress.

[Robert Roth <robertroth src gnome org>]

commit 2904347d5ff16891291b616d0498cf5fd90ca617
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Thu Mar 12 19:47:14 2020 +0100

    Use GestureMultiPress.

 src/view.vala | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)
---
diff --git a/src/view.vala b/src/view.vala
index 5ccfda4..47c2856 100644
--- a/src/view.vala
+++ b/src/view.vala
@@ -51,12 +51,16 @@ private class View : DrawingArea
     private int animation_state;
     private uint animation_id;
 
+    private GestureMultiPress click_controller;         // for keeping in memory
+
     internal View (GLib.Settings settings, Game game, ThemeRenderer theme)
     {
         this.settings = settings;
         this.game = game;
         this.theme = theme;
 
+        init_mouse ();
+
         cs = get_style_context ();
         provider = new CssProvider ();
         cs.add_class ("game-view");
@@ -217,10 +221,10 @@ private class View : DrawingArea
         return true;
     }
 
-    private bool cell_clicked (int cell_x, int cell_y)
+    private void cell_clicked (int cell_x, int cell_y)
     {
         if (cell_x >= game.n_cols || cell_y >= game.n_rows)
-            return false;
+            return;
 
         keyboard_cursor_x = cell_x;
         keyboard_cursor_y = cell_y;
@@ -242,7 +246,7 @@ private class View : DrawingArea
                 animation_state = 0;
                 queue_draw ();
 
-                return true;
+                return;
             }
 
             start_x = cell_x;
@@ -262,7 +266,7 @@ private class View : DrawingArea
             bool move = game.make_move (start_y, start_x, end_y, end_x);
 
             if (!move)
-                return false;
+                return;
 
             start_x = -1;
             start_y = -1;
@@ -273,18 +277,18 @@ private class View : DrawingArea
                 animation_id = -1;
             }
         }
+    }
 
-        return true;
+    private void init_mouse ()
+    {
+        click_controller = new GestureMultiPress (this);    // only reacts to Gdk.BUTTON_PRIMARY
+        click_controller.pressed.connect (on_click);
     }
 
-    protected override bool button_press_event (Gdk.EventButton event)
+    private inline void on_click (GestureMultiPress _click_controller, int n_press, double event_x, double 
event_y)
     {
         if (game == null || game.animating)
-            return false;
-
-        /* Ignore the 2BUTTON and 3BUTTON events. */
-        if (event.type != Gdk.EventType.BUTTON_PRESS)
-            return false;
+            return;
 
         if (show_cursor)
         {
@@ -292,10 +296,10 @@ private class View : DrawingArea
             queue_draw_area (keyboard_cursor_x * piece_size, keyboard_cursor_y * piece_size, piece_size, 
piece_size);
         }
 
-        cell_x = (int)event.x / piece_size;
-        cell_y = (int)event.y / piece_size;
+        cell_x = (int)event_x / piece_size;
+        cell_y = (int)event_y / piece_size;
 
-        return cell_clicked (cell_x, cell_y);
+        cell_clicked (cell_x, cell_y);
     }
 
     private bool animate_clicked ()