55 files changed, 4741 insertions, 266 deletions

diff --git a/js/panels/Timeline/Collapser.js b/js/panels/Timeline/Collapser.js
new file mode 100644
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+++ b/js/panels/Timeline/Collapser.js
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+/*
+ * Collapser:  Takes two elements and creates a visual "expando:" clicking on one element expands/collapses the other.
+ * Required properties:
+ *              clicker: The element that will be clicked on.
+ *              content: The element that will expand or collapse as the clicker is clicked on.
+ * Optional properties:
+ *              isCollapsed: Is the content collapsed.  Set to true on serialization (or initialization) to start content in collapsed state.
+ *                      Can be manually set as well.
+ *              collapsibleClass: The CSS class to apply to the content and the clicker when collapsed.  Defaults to "collapsible-collapsed".
+ *              isAnimated: Set to true to apply a transition to expand/collapse (defaults to false).
+ *              transitionClass: If isAnimated is set to true, the component will apply transitionClass to the content during the 
+ *                      collapse process.  You can then define transitionClass in your style sheet with the desired CSS transitions.
+ *                      Defaults to "collapsible-transition".
+ *              contentHeight: If both isAnimated and isCollapsedAtStart are set to true, set contentHeight to the height of the content 
+ *                      (in pixels, but without the "px") when not collapsed.  If this value is not set, the first time the content is expanded 
+ *                      the transition will not work. Subsequent collapses (and expansions) will transition as expected.
+ *              isLabelClickable: Boolean that indicates whether or not the clicker should have listener events. Defaults to true; set to 
+ *                      false for collapsers that will only be operated remotely.
+ *              toggle(): Manually toggle the expand/collapse of the content.
+ *              
+ */
+var Montage = require("montage/core/core").Montage,
+        Component = require("montage/ui/component").Component,
+        Collapser = exports.Collapser = Montage.create(Component, {
+
+        // This component has no template.
+        hasTemplate:{
+                value: false
+        },
+        
+        /* === BEGIN: Models === */
+        
+        // contentHeight: Stores the height of the content just before collapse.
+        _contentHeight: {
+                value: 0
+        },
+        contentHeight: {
+                get: function() {
+                        return this._contentHeight;
+                },
+                set: function(newVal) {
+                        this._contentHeight = newVal;
+                }
+        },
+        
+        // isCollapsing: true if the collapser is collapsing (or expanding); used in the draw cycle.
+        _isCollapsing: {
+                value: false
+        },
+        
+        // isAnimated: boolean to apply transition to expand/collapse 
+        _isAnimated : {
+                value: false
+        },
+        isAnimated: {
+                get: function() {
+                        return this._isAnimated;
+                },
+                set: function(newVal) {
+                        this._isAnimated = newVal;
+                }
+        },
+        
+        _bypassAnimation : {
+                value: false
+        },
+        bypassAnimation: {
+                get: function() {
+                        return this._bypassAnimation;
+                },
+                set: function(newVal) {
+                        this._bypassAnimation= newVal;
+                }
+        },
+        
+        // transitionClass: The CSS class to apply to the content during collapse to provide CSS transition.
+        // Note that this CSS class must be defined in your style sheet with the desired transitions.
+        _transitionClass : {
+                value: "collapsible-transition"
+        },
+        transitionClass: {
+                get: function() {
+                        return this._transitionClass;
+                },
+                set: function(newVal) {
+                        this._transitionClass = newVal;
+                }
+        },
+        
+        // isCollapsed: is the content actually collapsed at this moment
+        _isCollapsed: {
+                value: ""
+        },
+        isCollapsed : {
+                get: function() {
+                        return this._isCollapsed;
+                },
+                set: function(newVal) {
+                        if (newVal !== this._isCollapsed) {
+                                this._isCollapsed = newVal;
+                                this.needsDraw = true;
+                        }
+                        
+                }
+        },
+        
+        // collapsedClass:  the class to apply to the clicker and content when the content is collapsed.
+        _collapsedClass : {
+                value: "collapsible-collapsed"
+        },
+        collapsedClass: {
+                get: function() {
+                        return this._collapsedClass;
+                },
+                set: function(newVal) {
+                        this._collapsedClass = newVal;
+                }
+        },
+        
+        // _origOverflowValue: Stores the original overflow value of the collapsible element.
+        // Why store the value? While the collapsible element is collapsed, obviously we will need overflow: hidden.
+        // But when the collapsible element is open, we will need overflow to return to its original value.
+        _origOverflowValue : {
+                value: false
+        },
+        
+        // isLabelClickable: Boolean for whether or not the label is clickable. If set to false,
+        // the label click listener is never applied.  For collapsibles that will only be operated remotely.
+        // Defaults to true.
+        _isLabelClickable : {
+                value: true
+        },
+        isLabelClickable : {
+                get: function() {
+                        return this._isLabelClickable;
+                },
+                set: function(newVal) {
+                        this._isLabelClickable = newVal;