[gnome-shell/wip/re-search-v2: 21/28] dash: Add show/hide methods

[Cosimo Cecchi <cosimoc src gnome org>]

commit 747b34343bf4cf2a4930668f49b962fd44aa1ea1
Author: Tanner Doshier <doshitan gmail com>
Date:   Thu Aug 16 19:59:07 2012 -0500

    dash: Add show/hide methods
    
    https://bugzilla.gnome.org/show_bug.cgi?id=682050

 js/ui/dash.js |   49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 48 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/dash.js b/js/ui/dash.js
index 3bd3766..0b81263 100644
--- a/js/ui/dash.js
+++ b/js/ui/dash.js
@@ -371,6 +371,7 @@ const Dash = new Lang.Class({
         this._maxHeight = -1;
         this.iconSize = 64;
         this._shownInitially = false;
+        this._ignoreHeight = false;
 
         this._dragPlaceholder = null;
         this._dragPlaceholderPos = -1;
@@ -396,7 +397,10 @@ const Dash = new Lang.Class({
         this.actor = new St.Bin({ child: this._container });
         this.actor.connect('notify::height', Lang.bind(this,
             function() {
-                if (this._maxHeight != this.actor.height)
+                if (this._ignoreHeight)
+                    return;
+
+                if (this._maxHeight != this.actor.height);
                     this._queueRedisplay();
                 this._maxHeight = this.actor.height;
             }));
@@ -421,6 +425,8 @@ const Dash = new Lang.Class({
                               Lang.bind(this, this._onDragCancelled));
         Main.overview.connect('window-drag-end',
                               Lang.bind(this, this._onDragEnd));
+        Main.overview.connect('showing',
+                              Lang.bind(this, this._onOverviewShowing));
     },
 
     _onDragBegin: function() {
@@ -923,6 +929,47 @@ const Dash = new Lang.Class({
             }));
 
         return true;
+    },
+
+    _computeTranslation: function() {
+        let rtl = (this.actor.get_text_direction() == Clutter.TextDirection.RTL);
+
+        if (rtl)
+            return this.actor.width;
+        else
+            return - this.actor.width;
+    },
+
+    _onOverviewShowing: function() {
+        // reset any translation and make sure the actor is visible when
+        // entering the overview
+        this.actor.translation_x = 0;
+        this.actor.show();
+    },
+
+    show: function() {
+        this.actor.show();
+        Tweener.addTween(this.actor, { translation_x: 0,
+                                       transition: 'easeOutQuad',
+                                       time: DASH_ANIMATION_TIME,
+                                       onComplete: Lang.bind(this,
+                                           function() {
+                                               this._ignoreHeight = false;
+                                           })
+                                       });
+    },
+
+    hide: function() {
+        this._ignoreHeight = true;
+        let hiddenX = this._computeTranslation();
+        Tweener.addTween(this.actor, { translation_x: hiddenX,
+                                       transition: 'easeOutQuad',
+                                       time: DASH_ANIMATION_TIME,
+                                       onComplete: Lang.bind(this,
+                                           function() {
+                                               this.actor.hide();
+                                           })
+                                     });
     }
 });