[gnome-shell] overview: move controls visibility handling to a separate object

[Cosimo Cecchi <cosimoc src gnome org>]

commit 579e53f02c994101a50e34a53493d4c127fe2cc5
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Fri Feb 15 18:25:36 2013 -0500

    overview: move controls visibility handling to a separate object
    
    This keeps the core code of the overview clean and will help
    coordinate animations.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=693924

 js/ui/overview.js         |   57 ++++++++++++---------------------------------
 js/ui/overviewControls.js |   40 +++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+), 42 deletions(-)
---
diff --git a/js/ui/overview.js b/js/ui/overview.js
index c57ab95..f5706f0 100644
--- a/js/ui/overview.js
+++ b/js/ui/overview.js
@@ -223,25 +223,20 @@ const Overview = new Lang.Class({
                                             x_align: St.Align.MIDDLE });
         this._overview.add_actor(this._searchEntryBin);
 
-        // TODO - recalculate everything when desktop size changes
+        // Create controls
         this._dash = new Dash.Dash();
-        this.dashIconSize = this._dash.iconSize;
-        this._dash.connect('icon-size-changed',
-                           Lang.bind(this, function() {
-                               this.dashIconSize = this._dash.iconSize;
-                           }));
-
-        this._dashSlider = new OverviewControls.DashSlider(this._dash);
-        this._group.add_actor(this._dashSlider.actor);
-
         this._viewSelector = new ViewSelector.ViewSelector(this._searchEntry,
                                                            this._dash.showAppsButton);
+        this._thumbnailsBox = new WorkspaceThumbnail.ThumbnailsBox();
+        this._controls = new OverviewControls.ControlsManager(this._dash,
+                                                              this._thumbnailsBox,
+                                                              this._viewSelector);
+
+        // Pack all the actors into the group
+        this._group.add_actor(this._controls.dashActor);
         this._group.add(this._viewSelector.actor, { x_fill: true,
                                                     expand: true });
-
-        this._thumbnailsBox = new WorkspaceThumbnail.ThumbnailsBox();
-        this._thumbnailsSlider = new OverviewControls.ThumbnailsSlider(this._thumbnailsBox);
-        this._group.add_actor(this._thumbnailsSlider.actor);
+        this._group.add_actor(this._controls.thumbnailsActor);
 
         // Add our same-line elements after the search entry
         this._overview.add(this._group, { y_fill: true,
@@ -255,39 +250,17 @@ const Overview = new Lang.Class({
                                               y_fill: true });
         this._overview.add_actor(this._messageTrayGhost);
 
-        this._viewSelector.connect('page-changed', Lang.bind(this,
-            function() {
-                this._setSideControlsVisibility();
-            }));
+        // TODO - recalculate everything when desktop size changes
+        this.dashIconSize = this._dash.iconSize;
+        this._dash.connect('icon-size-changed',
+                           Lang.bind(this, function() {
+                               this.dashIconSize = this._dash.iconSize;
+                           }));
 
         Main.layoutManager.connect('monitors-changed', Lang.bind(this, this._relayout));
         this._relayout();
     },
 
-    _setSideControlsVisibility: function() {
-        // Ignore the case when we're leaving the overview, since
-        // actors will be made visible again when entering the overview
-        // next time, and animating them while doing so is just
-        // unnecesary noise
-        if (!this.visible || this._hideInProgress)
-            return;
-
-        let activePage = this._viewSelector.getActivePage();
-        let dashVisible = (activePage == ViewSelector.ViewPage.WINDOWS ||
-                           activePage == ViewSelector.ViewPage.APPS);
-        let thumbnailsVisible = (activePage == ViewSelector.ViewPage.WINDOWS);
-
-        if (dashVisible)
-            this._dashSlider.slideIn();
-        else
-            this._dashSlider.slideOut();
-
-        if (thumbnailsVisible)
-            this._thumbnailsSlider.slideIn();
-        else
-            this._thumbnailsSlider.slideOut();
-    },
-
     addSearchProvider: function(provider) {
         this._viewSelector.addSearchProvider(provider);
     },
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index 8413874..495731a 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -6,6 +6,7 @@ const St = imports.gi.St;
 
 const Main = imports.ui.main;
 const Tweener = imports.ui.tweener;
+const ViewSelector = imports.ui.viewSelector;
 
 const SIDE_CONTROLS_ANIMATION_TIME = 0.2;
 
@@ -232,3 +233,42 @@ const DashSlider = new Lang.Class({
             return 0;
     }
 });
+
+const ControlsManager = new Lang.Class({
+    Name: 'ControlsManager',
+
+    _init: function(dash, thumbnails, viewSelector) {
+        this._dashSlider = new DashSlider(dash);
+        this.dashActor = this._dashSlider.actor;
+
+        this._thumbnailsSlider = new ThumbnailsSlider(thumbnails);
+        this.thumbnailsActor = this._thumbnailsSlider.actor;
+
+        this._viewSelector = viewSelector;
+        this._viewSelector.connect('page-changed', Lang.bind(this, this._setVisibility));
+    },
+
+    _setVisibility: function() {
+        // Ignore the case when we're leaving the overview, since
+        // actors will be made visible again when entering the overview
+        // next time, and animating them while doing so is just
+        // unnecessary noise
+        if (!Main.overview.visible)
+            return;
+
+        let activePage = this._viewSelector.getActivePage();
+        let dashVisible = (activePage == ViewSelector.ViewPage.WINDOWS ||
+                           activePage == ViewSelector.ViewPage.APPS);
+        let thumbnailsVisible = (activePage == ViewSelector.ViewPage.WINDOWS);
+
+        if (dashVisible)
+            this._dashSlider.slideIn();
+        else
+            this._dashSlider.slideOut();
+
+        if (thumbnailsVisible)
+            this._thumbnailsSlider.slideIn();
+        else
+            this._thumbnailsSlider.slideOut();
+    }
+});