[gnome-mines/arnaudb/wip/gtk4: 5/39] Use GestureClick.

[Arnaud B. <arnaudb src gnome org>]

commit a7e07b1f21fb0d45a5f02bb21a23a59c25eb1ed9
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Apr 13 22:33:55 2020 +0200

    Use GestureClick.

 src/gnome-mines.vala    | 19 ++++++++++---------
 src/minefield-view.vala | 20 +++++++++++---------
 src/tile.vala           | 31 ++++++++++++++++++++-----------
 3 files changed, 41 insertions(+), 29 deletions(-)
---
diff --git a/src/gnome-mines.vala b/src/gnome-mines.vala
index 1309076..7632e8d 100644
--- a/src/gnome-mines.vala
+++ b/src/gnome-mines.vala
@@ -89,6 +89,7 @@ public class Mines : Gtk.Application
     private AspectFrame new_game_screen;
     private AspectFrame custom_game_screen;
     private CssProvider theme_provider;
+    private GestureClick view_click_controller;         // for keeping in memory
 
     private const OptionEntry[] option_entries =
     {
@@ -297,7 +298,10 @@ public class Mines : Gtk.Application
         paused_box = (Box) ui_builder.get_object ("paused_box");
         buttons_box = (Box) ui_builder.get_object ("buttons_box");
         aspect_child = (Box) ui_builder.get_object ("aspect_child");
-        paused_box.button_press_event.connect (view_button_press_event);
+
+        view_click_controller = new GestureClick ();    // only reacts to left-click button
+        view_click_controller.pressed.connect (view_button_press_event);
+        paused_box.add_controller (view_click_controller);
 
         minefield_overlay.add_overlay (paused_box);
 
@@ -538,17 +542,14 @@ public class Mines : Gtk.Application
         window.present ();
     }
 
-    private bool view_button_press_event (Widget widget, Gdk.EventButton event)
+    private inline void view_button_press_event (GestureClick _view_click_controller, int n_press, double x, 
double y)
     {
         /* Cancel pause on click */
-        if (minefield.paused)
-        {
-            minefield.paused = false;
-            pause_requested = false;
-            return true;
-        }
+        if (!minefield.paused)
+            return;
 
-        return false;
+        minefield.paused = false;
+        pause_requested = false;
     }
 
     private void quit_cb ()
diff --git a/src/minefield-view.vala b/src/minefield-view.vala
index d399b95..61595b1 100644
--- a/src/minefield-view.vala
+++ b/src/minefield-view.vala
@@ -191,9 +191,9 @@ public class MinefieldView : Gtk.Grid
                 {
                     mines[i,j] = new Tile (i, j);
                     mines[i,j].show ();
-                    mines[i,j].tile_pressed.connect ((x, y, event) => { tile_pressed_cb (x, y, event); });
-                    mines[i,j].tile_released.connect ((x, y, event) => { tile_released_cb (x, y, event); });
-                    mines[i,j].tile_long_pressed.connect ((x, y) => { tile_long_pressed_cb (x, y); });
+                    mines[i,j].tile_pressed.connect (tile_pressed_cb);
+                    mines[i,j].tile_released.connect (tile_released_cb);
+                    mines[i,j].tile_long_pressed.connect (tile_long_pressed_cb);
                     add (mines[i,j], i, j);
                 }
             }
@@ -214,10 +214,10 @@ public class MinefieldView : Gtk.Grid
         }
     }
 
-    public void tile_pressed_cb (int x, int y, Gdk.EventButton event)
+    private inline void tile_pressed_cb (int x, int y, uint button, int n_press, bool ctrl)
     {
         /* Ignore double click events */
-        if (event.type != Gdk.EventType.BUTTON_PRESS)
+        if (n_press > 1)
             return;
 
         /* Check for end cases and paused game */
@@ -237,7 +237,8 @@ public class MinefieldView : Gtk.Grid
             return;
 
         /* Right or Ctrl+Left button to toggle flags */
-        if (event.button == 3 || (event.button == 1 && (event.state & Gdk.ModifierType.CONTROL_MASK) != 0))
+        if (button == Gdk.BUTTON_SECONDARY
+         || button == Gdk.BUTTON_PRIMARY && ctrl)
         {
             toggle_mark (selected.x, selected.y);
             this.force_nolongpress = true;
@@ -252,9 +253,10 @@ public class MinefieldView : Gtk.Grid
         keyboard_cursor.position = {selected.x, selected.y};
     }
 
-    public void tile_released_cb (int x, int y, Gdk.EventButton event)
+    private inline void tile_released_cb (int x, int y, uint button)
     {
-        if (event.button != 1) return;
+        if (button != Gdk.BUTTON_PRIMARY)
+            return;
 
         this.force_nolongpress = false;
 
@@ -283,7 +285,7 @@ public class MinefieldView : Gtk.Grid
         selected.is_set = false;
     }
 
-    public void tile_long_pressed_cb (int x, int y)
+    private inline void tile_long_pressed_cb (int x, int y)
     {
         if (this.force_nolongpress == true) return;
         selected.is_set = false;
diff --git a/src/tile.vala b/src/tile.vala
index 7aa945b..898ae58 100644
--- a/src/tile.vala
+++ b/src/tile.vala
@@ -3,11 +3,12 @@ public class Tile : Gtk.Button
     public int row      { internal get; protected construct; }
     public int column   { internal get; protected construct; }
 
-    private Gtk.GestureLongPress _gesture;
+    private Gtk.GestureLongPress _gesture;              // for keeping in memory
+    private Gtk.GestureClick _click_controller;         // for keeping in memory
 
     public signal void tile_mouse_over (int x, int y);
-    public signal void tile_pressed (int x, int y, Gdk.EventButton event);
-    public signal void tile_released (int x, int y, Gdk.EventButton event);
+    public signal void tile_pressed (int x, int y, uint button, int n_press, bool ctrl);
+    public signal void tile_released (int x, int y, uint button);
     public signal void tile_long_pressed (int x, int y);
 
     public Tile (int prow, int pcol)
@@ -19,27 +20,35 @@ public class Tile : Gtk.Button
     {
         can_focus = false;
         add_class ("tile");
-        _gesture = new Gtk.GestureLongPress (this);
+
+        _gesture = new Gtk.GestureLongPress ();
         _gesture.touch_only = true;
         _gesture.pressed.connect((x, y) =>
         {
             tile_long_pressed (row, column);
         });
-        button_press_event.connect ((event) =>
+        add_controller (_gesture);
+
+        _click_controller = new Gtk.GestureClick ();
+        _click_controller.set_button (/* all buttons */ 0);
+        _click_controller.pressed.connect ((click_controller, n_press, x, y) =>
         {
             /* By default windows with both button press and button release
              * grab Gdk events, ungrab events here for other tiles. */
-            event.get_seat().ungrab ();
+//            event.get_seat().ungrab ();       // TODO do something instead?
 //            event.device.ungrab (event.time);
 
-            tile_pressed (row, column, event);
-            return false;
+            Gdk.ModifierType state = click_controller.get_current_event_state ();
+            bool ctrl = (state & Gdk.ModifierType.CONTROL_MASK) != 0;
+            uint button = click_controller.get_current_button ();
+            tile_pressed (row, column, button, n_press, ctrl);
         });
-        button_release_event.connect ((event) =>
+        _click_controller.released.connect ((click_controller, n_press, x, y) =>
         {
-            tile_released (row, column, event);
-            return false;
+            uint button = click_controller.get_current_button ();
+            tile_released (row, column, button);
         });
+        add_controller (_click_controller);
     }
 
     public void add_class (string style_class)