[gnome-shell/gbsneto/icon-grid-part3: 14/17] appIcon: Scale and fade itself when starting drag

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

commit 7016e19b141ff5ff0d9c51abc2bc5ad935b353a6
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 | 25 ++++++++++++++++++++++++-
 js/ui/dash.js       | 10 ----------
 2 files changed, 24 insertions(+), 11 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index 079af4ff75..bcc8e328be 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;
     }
 
@@ -1443,8 +1444,10 @@ var FolderIcon = class FolderIcon {
     }
 
     acceptDrop(source) {
-        if (!this._canAccept(source))
+        if (!this._canAccept(source)) {
+            source.undoScaleAndFade();
             return true;
+        }
 
         let app = source.app;
         let folderApps = this._folder.get_strv('apps');
@@ -1776,6 +1779,7 @@ 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 +1789,7 @@ var AppIcon = class AppIcon {
             });
             this._draggable.connect('drag-end', () => {
                 this._dragging = false;
+                this.undoScaleAndFade();
                 Main.overview.endItemDrag(this);
             });
         }
@@ -1980,6 +1985,24 @@ 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) => {