source: Dev/trunk/src/client/dojox/layout/RotatorContainer.js

define(["dojo/_base/declare","dojo/_base/html","dojo/_base/connect","dojo/_base/lang","dojo/_base/array",
        "dojo/_base/fx","dojo/fx","dijit/_base/manager","dijit/layout/StackContainer","dijit/layout/StackController","dijit/_Widget",
        "dijit/_Templated","dijit/_Contained"
],function(declare,html,connect,lang,array,baseFx,coreFx,manager,
        StackContainer,StackController,Widget,Templated,Contained){

var RotatorContainer = declare("dojox.layout.RotatorContainer",[StackContainer, Templated], {
        // summary:
        //              Extends a StackContainer to automatically transition between children
        //              and display navigation in the form of tabs or a pager.
        //
        // description:
        //              The RotatorContainer cycles through the children with a transition.
        //
        //              ####published topics:
        //
        //              [widgetId]-update - Notifies pager(s) that a child has changed.
        //              Parameters:
        //
        //              - /*boolean*/ playing - true if playing, false if paused
        //              - /*int*/ current     - current selected child
        //              - /*int*/ total       - total number of children
        //
        // example:
        // |    <div dojoType="dojox.layout.RotatorContainer" id="myRotator" showTabs="true" autoStart="true" transitionDelay="5000">
        // |            <div id="pane1" dojoType="dijit.layout.ContentPane" title="1">
        // |                    Pane 1!
        // |            </div>
        // |            <div id="pane2" dojoType="dijit.layout.ContentPane" title="2">
        // |                    Pane 2!
        // |            </div>
        // |            <div id="pane3" dojoType="dijit.layout.ContentPane" title="3" transitionDelay="10000">
        // |                    Pane 3 with overrided transitionDelay!
        // |            </div>
        // |    </div>

        templateString: '<div class="dojoxRotatorContainer"><div dojoAttachPoint="tabNode"></div><div class="dojoxRotatorPager" dojoAttachPoint="pagerNode"></div><div class="dojoxRotatorContent" dojoAttachPoint="containerNode"></div></div>',

        // showTabs: Boolean
        //              Sets the display of the tabs.  The tabs are actually a StackController.
        //              The child's title is used for the tab's label.
        showTabs: true,

        // transitionDelay: int
        //              The delay in milliseconds before transitioning to the next child.
        transitionDelay: 5000,

        // transition: String
        //              The type of transition to perform when switching children.
        //              A null transition will transition instantly.
        transition: "fade",

        // transitionDuration: int
        //              The duration of the transition in milliseconds.
        transitionDuration: 1000,

        // autoStart: Boolean
        //              Starts the timer to transition children upon creation.
        autoStart: true,

        // suspendOnHover: Boolean
        //              Pause the rotator when the mouse hovers over it.
        suspendOnHover: false,

        // pauseOnManualChange: Boolean
        //              Pause the rotator when the tab is changed or the pager's next/previous
        //              buttons are clicked.
        pauseOnManualChange: null,

        // reverse: Boolean
        //              Causes the rotator to rotate in reverse order.
        reverse: false,

        // pagerId: String
        //              ID the pager widget.
        pagerId: "",

        // cycles: int
        //              Number of cycles before pausing.
        cycles: -1,

        // pagerClass: String
        //              The declared Class of the Pager used for this Widget
        pagerClass: "dojox.layout.RotatorPager",

        postCreate: function(){
                // summary:
                //              Initializes the DOM nodes, tabs, and transition stuff.
                this.inherited(arguments);

                // force this DOM node to a relative position and make sure the children are absolute positioned
                html.style(this.domNode, "position", "relative");

                // validate the cycles counter
                if(this.cycles-0 == this.cycles && this.cycles != -1){
                        // we need to add 1 because we decrement cycles before the animation starts
                        this.cycles++;
                }else{
                        this.cycles = -1;
                }

                // if they didn't specify the pauseOnManualChange, then we want it to be the opposite of
                // the suspendOnHover since it doesn't make sense to do both, unless you really want to
                if(this.pauseOnManualChange === null){
                        this.pauseOnManualChange = !this.suspendOnHover;
                }

                // create the stack controller if we are using tabs
                var id = this.id || "rotator"+(new Date()).getTime(),
                        sc = new StackController({ containerId:id }, this.tabNode);
                this.tabNode = sc.domNode;
                this._stackController = sc;
                html.style(this.tabNode, "display", this.showTabs ? "" : "none");

                // if the controller's tabs are clicked, check if we should pause and reset the cycle counter
                this.connect(sc, "onButtonClick","_manualChange");

                // set up our topic listeners
                this._subscriptions = [
                        connect.subscribe(this.id+"-cycle", this, "_cycle"),
                        connect.subscribe(this.id+"-state", this, "_state")
                ];

                // make sure the transition duration isn't less than the transition delay
                var d = Math.round(this.transitionDelay * 0.75);
                if(d < this.transitionDuration){
                        this.transitionDuration = d;
                }

                // wire up the mouse hover events
                if(this.suspendOnHover){
                        this.connect(this.domNode, "onmouseover", "_onMouseOver");
                        this.connect(this.domNode, "onmouseout", "_onMouseOut");
                }
        },

        startup: function(){
                // summary:
                //              Initializes the pagers.
                if(this._started){ return; }

                // check if the pager is defined within the rotator container
                var c = this.getChildren();
                for(var i=0, len=c.length; i<len; i++){
                        if(c[i].declaredClass == this.pagerClass){
                                this.pagerNode.appendChild(c[i].domNode);
                                break;
                        }
                }

                // process the child widgets
                this.inherited(arguments);

                // check if we should start automatically
                if(this.autoStart){
                        // start playing
                        setTimeout(lang.hitch(this, "_play"), 10);
                }else{
                        // update the pagers with the initial state
                        this._updatePager();
                }
        },

        destroy: function(){
                // summary:
                //              Unsubscribe to all of our topics
                array.forEach(this._subscriptions, connect.unsubscribe);
                this.inherited(arguments);
        },

        _setShowTabsAttr: function(/*anything*/value){
                this.showTabs = value;
                html.style(this.tabNode, "display", value ? "" : "none");
        },

        _updatePager: function(){
                // summary:
                //              Notify the pager's current and total numbers.
                var c = this.getChildren();
                connect.publish(this.id+"-update", [this._playing, array.indexOf(c, this.selectedChildWidget)+1, c.length]);
        },

        _onMouseOver: function(){
                // summary:
                //              Triggered when the mouse is moved over the rotator container.

                // temporarily suspend the cycling, but don't officially pause it
                this._resetTimer();
                this._over = true;
        },

        _onMouseOut: function(){
                // summary:
                //              Triggered when the mouse is moved off the rotator container.
                this._over = false;

                // if we were playing, resume playback in 200ms
                // we need to wait because we may be moused over again right away
                if(this._playing){
                        clearTimeout(this._timer);
                        this._timer = setTimeout(lang.hitch(this, "_play", true), 200);
                }
        },

        _resetTimer: function(){
                // summary:
                //              Resets the timer used to start the next transition.
                clearTimeout(this._timer);
                this._timer = null;
        },

        _cycle: function(/*boolean or int*/next){
                // summary:
                //              Cycles to the next/previous child.

                // if next is an int, then _cycle() was called via a timer
                // if next is a boolean, then _cycle() was called via the next/prev buttons, stop playing and reset cycles
                if(next instanceof Boolean || typeof next == "boolean"){
                        this._manualChange();
                }

                var c = this.getChildren(),
                        len = c.length,
                        i = array.indexOf(c, this.selectedChildWidget) + (next === false || (next !== true && this.reverse) ? -1 : 1);
                this.selectChild(c[(i < len ? (i < 0 ? len-1 : i) : 0)]);
                this._updatePager();
        },

        _manualChange: function(){
                // summary:
                //              This function is only called when a manual change occurs in which
                //              case we may need to stop playing and we need to reset the cycle counter
                if(this.pauseOnManualChange){
                        this._playing = false;
                }
                this.cycles = -1;
        },

        _play: function(skip){
                // summary:
                //              Schedules the next transition.
                this._playing = true;
                this._resetTimer();
                if(skip !== true && this.cycles>0){
                        this.cycles--;
                }
                if(this.cycles==0){
                        this._pause();
                }else if((!this.suspendOnHover || !this._over) && this.transitionDelay){
                        // check if current pane has a delay
                        this._timer = setTimeout(lang.hitch(this, "_cycle"), this.selectedChildWidget.domNode.getAttribute("transitionDelay") || this.transitionDelay);
                }
                this._updatePager();
        },

        _pause: function(){
                // summary:
                //              Clears the transition timer and pauses the rotator.
                this._playing = false;
                this._resetTimer();
        },

        _state: function(playing){
                // summary:
                //              Fired when the play/pause pager button is toggled.
                if(playing){
                        // since we were manually changed, disable the cycle counter
                        this.cycles = -1;
                        this._play();
                }else{
                        this._pause();
                }
        },

        _transition: function(/*dijit._Widget*/ next, /*dijit._Widget*/ prev){
                // summary:
                //              Dispatches the appropriate transition.
                this._resetTimer();

                // check if we have anything to transition
                if(prev && this.transitionDuration){
                        switch(this.transition){
                                case "fade": this._fade(next, prev); return;
                        }
                }

                this._transitionEnd();
                this.inherited(arguments);
        },

        _transitionEnd: function(){
                if(this._playing){
                        this._play();
                }else{
                        this._updatePager();
                }
        },

        _fade: function(/*dijit._Widget*/ next, /*dijit._Widget*/ prev){
                // summary:
                //              Crossfades two children.
                this._styleNode(prev.domNode, 1, 1);
                this._styleNode(next.domNode, 0, 2);

                // show the next child and make sure it's sized properly
                this._showChild(next);
                if(this.doLayout && next.resize){
                        next.resize(this._containerContentBox || this._contentBox);
                }

                // create the crossfade animation
                var args = { duration:this.transitionDuration },
                        anim = coreFx.combine([
                                baseFx["fadeOut"](lang.mixin({node:prev.domNode}, args)),
                                baseFx["fadeIn"](lang.mixin({node:next.domNode}, args))
                        ]);

                this.connect(anim, "onEnd", lang.hitch(this,function(){
                        this._hideChild(prev);
                        this._transitionEnd();
                }));

                anim.play();
        },

        _styleNode: function(/*DomNode*/node, /*number*/opacity, /*int*/zIndex){
                // summary:
                //              Helper function to style the children.
                html.style(node, "opacity", opacity);
                html.style(node, "zIndex", zIndex);
                html.style(node, "position", "absolute");
        }
});

declare("dojox.layout.RotatorPager", [Widget, Templated, Contained], {
        // summary:
        //              Defines controls used to manipulate a RotatorContainer
        //
        // description:
        //              A pager can be defined one of two ways:
        //
        //              - Externally of the RotatorContainer's template and tell the
        //              RotatorPager the rotatorId of the RotatorContainer
        //              - As a direct descendant of the RotatorContainer (i.e. inside the
        //              RotatorContainer's template)
        //
        //              The pager can contain the following components:
        //
        //              - Previous button
        //                      - Must be a dijit.form.Button
        //                      - dojoAttachPoint must be named "previous"
        //              - Next button
        //                      - Must be a dijit.form.Button
        //                      - dojoAttachPoint must be named "next"
        //              - Play/Pause toggle button
        //                      - Must be a dijit.form.ToggleButton
        //                      - dojoAttachPoint must be named "playPause"
        //                      - Use iconClass to specify toggled state
        //              - Current child #
        //                      - dojoAttachPoint must be named "current"
        //              - Total # of children
        //                      - dojoAttachPoint must be named "total"
        //
        //              You can choose to exclude specific controls as well as add elements
        //              for styling.
        //
        //              Should you need a pager, but don't want to use Dijit buttons, you can
        //              write your own pager widget and just wire it into the topics.  The
        //              topic names are prefixed with the widget ID of the RotatorContainer.
        //              Notifications are received from and sent to the RotatorContainer as
        //              well as other RotatorPagers.
        //
        //              ####published topics:
        //
        //              [widgetId]-cycle - Notify that the next or previous button was pressed.
        //              Parameters:
        //
        //              - /*boolean*/ next - true if next, false if previous
        //
        //              [widgetId]-state - Notify that the play/pause button was toggled.
        //              Parameters:
        //
        //              - /*boolean*/ playing - true if playing, false if paused
        //
        // example:
        //              A pager with the current/total children and previous/next buttons.
        // |    <div dojoType="dojox.layout.RotatorPager" rotatorId="myRotator">
        // |            <button dojoType="dijit.form.Button" dojoAttachPoint="previous">Prev</button>
        // |            <span dojoAttachPoint="current"></span> / <span dojoAttachPoint="total"></span>
        // |            <button dojoType="dijit.form.Button" dojoAttachPoint="next">Next</button>
        // |    </div>
        //
        // example:
        //              A pager with only a play/pause toggle button.
        // |    <div dojoType="dojox.layout.RotatorPager" rotatorId="myRotator">
        // |            <button dojoType="dijit.form.ToggleButton" dojoAttachPoint="playPause"></button>
        // |    </div>
        //
        // example:
        //              A pager styled with iconClass.
        // |    <div dojoType="dojox.layout.RotatorPager" class="rotatorIcons" rotatorId="myRotator">
        // |            <button dojoType="dijit.form.Button" iconClass="previous" dojoAttachPoint="previous">Prev</button>
        // |            <button dojoType="dijit.form.ToggleButton" iconClass="playPause" dojoAttachPoint="playPause"></button>
        // |            <button dojoType="dijit.form.Button" iconClass="next" dojoAttachPoint="next">Next</button>
        // |            <span dojoAttachPoint="current"></span> / <span dojoAttachPoint="total"></span>
        // |    </div>

        widgetsInTemplate: true,

        // rotatorId: int
        //              The ID of the rotator this pager is tied to.
        //              Only required if defined outside of the RotatorContainer's container.
        rotatorId: "",

        postMixInProperties: function(){
                this.templateString = "<div>" + this.srcNodeRef.innerHTML + "</div>";
        },

        postCreate: function(){
                var p = manager.byId(this.rotatorId) || this.getParent();
                if(p && p.declaredClass == "dojox.layout.RotatorContainer"){
                        if(this.previous){
                                connect.connect(this.previous, "onClick", function(){
                                        connect.publish(p.id+"-cycle", [false]);
                                });
                        }
                        if(this.next){
                                connect.connect(this.next, "onClick", function(){
                                        connect.publish(p.id+"-cycle", [true]);
                                });
                        }
                        if(this.playPause){
                                connect.connect(this.playPause, "onClick", function(){
                                        this.set('label', this.checked ? "Pause" : "Play");
                                        connect.publish(p.id+"-state", [this.checked]);
                                });
                        }
                        this._subscriptions = [
                                connect.subscribe(p.id+"-state", this, "_state"),
                                connect.subscribe(p.id+"-update", this, "_update")
                        ];
                }
        },

        destroy: function(){
                // Unsubscribe to all of our topics
                array.forEach(this._subscriptions, connect.unsubscribe);
                this.inherited(arguments);
        },

        _state: function(/*boolean*/playing){
                // summary:
                //              Updates the display of the play/pause button
                if(this.playPause && this.playPause.checked != playing){
                        this.playPause.set("label", playing ? "Pause" : "Play");
                        this.playPause.set("checked", playing);
                }
        },

        _update: function(/*boolean*/playing, /*int*/current, /*int*/total){
                // summary:
                //              Updates the pager's play/pause button, current child, and total number of children.
                this._state(playing);
                if(this.current && current){
                        this.current.innerHTML = current;
                }
                if(this.total && total){
                        this.total.innerHTML = total;
                }
        }
});
return RotatorContainer;
});