[gnome-shell/gbsneto/icon-grid-part3: 2/5] appIcon: Scale and fade itself when starting drag

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit a481fb0b456736c6328922fc2fc687b81699e1bc
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Jul 4 18:39:13 2019 -0300

    appIcon: Scale and fade itself when starting drag
    
    As per design direction, scale and fade the app icon
    when starting dragging it, and show it again if the
    drop is accepted. Clutter takes care of animating the
    rest of icon positions through implicit animations.
    
    Scale and fade the dragged icon while it's being dragged.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/671

 js/ui/appDisplay.js | 21 +++++++++++++++++++++
 js/ui/dash.js       | 10 ----------
 2 files changed, 21 insertions(+), 10 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index 079af4ff75..c754b7e1f8 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -784,6 +784,7 @@ var AllView = class AllView extends BaseAppView {
         if (this._currentPopup)
             this._currentPopup.popdown();
 
+        source.undoScaleAndFade();
         return true;
     }
 
@@ -1776,6 +1777,7 @@ var AppIcon = class AppIcon {
             this._draggable = DND.makeDraggable(this.actor);
             this._draggable.connect('drag-begin', () => {
                 this._dragging = true;
+                this.scaleAndFade();
                 this._removeMenuTimeout();
                 Main.overview.beginItemDrag(this);
             });
@@ -1785,6 +1787,7 @@ var AppIcon = class AppIcon {
             });
             this._draggable.connect('drag-end', () => {
                 this._dragging = false;
+                this.undoScaleAndFade();
                 Main.overview.endItemDrag(this);
             });
         }
@@ -1980,6 +1983,24 @@ var AppIcon = class AppIcon {
     shouldShowTooltip() {
         return this.actor.hover && (!this._menu || !this._menu.isOpen);
     }
+
+    scaleAndFade() {
+        this.actor.reactive = false;
+        this.actor.ease({
+            scale_x: 0.75,
+            scale_y: 0.75,
+            opacity: 128
+        });
+    }
+
+    undoScaleAndFade() {
+        this.actor.reactive = true;
+        this.actor.ease({
+            scale_x: 1.0,
+            scale_y: 1.0,
+            opacity: 255
+        });
+    }
 };
 Signals.addSignalMethods(AppIcon.prototype);
 
diff --git a/js/ui/dash.js b/js/ui/dash.js
index ca0257f543..b7ed5874c2 100644
--- a/js/ui/dash.js
+++ b/js/ui/dash.js
@@ -453,16 +453,6 @@ var Dash = class Dash {
         let appIcon = new AppDisplay.AppIcon(app,
                                              { setSizeManually: true,
                                                showLabel: false });
-        if (appIcon._draggable) {
-            appIcon._draggable.connect('drag-begin',
-                                       () => {
-                                           appIcon.actor.opacity = 50;
-                                       });
-            appIcon._draggable.connect('drag-end',
-                                       () => {
-                                           appIcon.actor.opacity = 255;
-                                       });
-        }
 
         appIcon.connect('menu-state-changed',
                         (appIcon, opened) => {