source: Dev/branches/rest-dojo-ui/client/dijit/_Container.js @ 274

define([
        "dojo/_base/array", // array.forEach array.indexOf
        "dojo/_base/declare", // declare
        "dojo/dom-construct", // domConstruct.place
        "./registry"    // registry.byNode()
], function(array, declare, domConstruct, registry){

        // module:
        //              dijit/_Container
        // summary:
        //              Mixin for widgets that contain a set of widget children.

        return declare("dijit._Container", null, {
                // summary:
                //              Mixin for widgets that contain a set of widget children.
                // description:
                //              Use this mixin for widgets that needs to know about and
                //              keep track of their widget children. Suitable for widgets like BorderContainer
                //              and TabContainer which contain (only) a set of child widgets.
                //
                //              It's not suitable for widgets like ContentPane
                //              which contains mixed HTML (plain DOM nodes in addition to widgets),
                //              and where contained widgets are not necessarily directly below
                //              this.containerNode.   In that case calls like addChild(node, position)
                //              wouldn't make sense.

                buildRendering: function(){
                        this.inherited(arguments);
                        if(!this.containerNode){
                                // all widgets with descendants must set containerNode
                                this.containerNode = this.domNode;
                        }
                },

                addChild: function(/*dijit._Widget*/ widget, /*int?*/ insertIndex){
                        // summary:
                        //              Makes the given widget a child of this widget.
                        // description:
                        //              Inserts specified child widget's dom node as a child of this widget's
                        //              container node, and possibly does other processing (such as layout).

                        var refNode = this.containerNode;
                        if(insertIndex && typeof insertIndex == "number"){
                                var children = this.getChildren();
                                if(children && children.length >= insertIndex){
                                        refNode = children[insertIndex-1].domNode;
                                        insertIndex = "after";
                                }
                        }
                        domConstruct.place(widget.domNode, refNode, insertIndex);

                        // If I've been started but the child widget hasn't been started,
                        // start it now.  Make sure to do this after widget has been
                        // inserted into the DOM tree, so it can see that it's being controlled by me,
                        // so it doesn't try to size itself.
                        if(this._started && !widget._started){
                                widget.startup();
                        }
                },

                removeChild: function(/*Widget|int*/ widget){
                        // summary:
                        //              Removes the passed widget instance from this widget but does
                        //              not destroy it.  You can also pass in an integer indicating
                        //              the index within the container to remove

                        if(typeof widget == "number"){
                                widget = this.getChildren()[widget];
                        }

                        if(widget){
                                var node = widget.domNode;
                                if(node && node.parentNode){
                                        node.parentNode.removeChild(node); // detach but don't destroy
                                }
                        }
                },

                hasChildren: function(){
                        // summary:
                        //              Returns true if widget has children, i.e. if this.containerNode contains something.
                        return this.getChildren().length > 0;   // Boolean
                },

                _getSiblingOfChild: function(/*dijit._Widget*/ child, /*int*/ dir){
                        // summary:
                        //              Get the next or previous widget sibling of child
                        // dir:
                        //              if 1, get the next sibling
                        //              if -1, get the previous sibling
                        // tags:
                        //      private
                        var node = child.domNode,
                                which = (dir>0 ? "nextSibling" : "previousSibling");
                        do{
                                node = node[which];
                        }while(node && (node.nodeType != 1 || !registry.byNode(node)));
                        return node && registry.byNode(node);   // dijit._Widget
                },

                getIndexOfChild: function(/*dijit._Widget*/ child){
                        // summary:
                        //              Gets the index of the child in this container or -1 if not found
                        return array.indexOf(this.getChildren(), child);        // int
                }
        });
});