if (!dojo._hasResource["dijit.layout.StackContainer"]) { // _hasResource
															// checks added by
															// build. Do not use
															// _hasResource
															// directly in your
															// code.
	dojo._hasResource["dijit.layout.StackContainer"] = true;
	dojo.provide("dijit.layout.StackContainer");

	dojo.require("dijit._Templated");
	dojo.require("dijit.layout._LayoutWidget");
	dojo.require("dijit.form.Button");

	dojo.declare("dijit.layout.StackContainer", dijit.layout._LayoutWidget,

			// summary
			// A container that has multiple children, but shows only
			// one child at a time (like looking at the pages in a book one by
			// one).
			//
			// Publishes topics <widgetId>-addChild, <widgetId>-removeChild, and
			// <widgetId>-selectChild
			//
			// Can be base class for container, Wizard, Show, etc.
			{
		// doLayout: Boolean
		// if true, change the size of my currently displayed child to match my
		// size
		doLayout : true,

		_started : false,

		// selectedChildWidget: Widget
		// References the currently selected child widget, if any

		postCreate : function() {
			dijit.setWaiRole((this.containerNode || this.domNode), "tabpanel");
			this.connect(this.domNode, "onkeypress", this._onKeyPress);
		},

		startup : function() {
			if (this._started) {
				return;
			}

			var children = this.getChildren();

			// Setup each page panel
			dojo.forEach(children, this._setupChild, this);

			// Figure out which child to initially display
			dojo.some(children, function(child) {
						if (child.selected) {
							this.selectedChildWidget = child;
						}
						return child.selected;
					}, this);

			var selected = this.selectedChildWidget;

			// Default to the first child
			if (!selected && children[0]) {
				selected = this.selectedChildWidget = children[0];
				selected.selected = true;
			}
			if (selected) {
				this._showChild(selected);
			}

			// Now publish information about myself so any StackControllers can
			// initialize..
			dojo.publish(this.id + "-startup", [{
								children : children,
								selected : selected
							}]);
			this.inherited("startup", arguments);
			this._started = true;
		},

		_setupChild : function(/* Widget */page) {
			// Summary: prepare the given child

			page.domNode.style.display = "none";

			// since we are setting the width/height of the child elements, they
			// need
			// to be position:relative, or IE has problems (See bug #2033)
			page.domNode.style.position = "relative";

			return page; // dijit._Widget
		},

		addChild : function(/* Widget */child, /* Integer? */insertIndex) {
			// summary: Adds a widget to the stack

			dijit._Container.prototype.addChild.apply(this, arguments);
			child = this._setupChild(child);

			if (this._started) {
				// in case the tab titles have overflowed from one line to two
				// lines
				this.layout();

				dojo.publish(this.id + "-addChild", [child, insertIndex]);

				// if this is the first child, then select it
				if (!this.selectedChildWidget) {
					this.selectChild(child);
				}
			}
		},

		removeChild : function(/* Widget */page) {
			// summary: Removes the pane from the stack

			dijit._Container.prototype.removeChild.apply(this, arguments);

			// If we are being destroyed than don't run the code below (to
			// select another page), because we are deleting
			// every page one by one
			if (this._beingDestroyed) {
				return;
			}

			if (this._started) {
				// this will notify any tablists to remove a button; do this
				// first because it may affect sizing
				dojo.publish(this.id + "-removeChild", [page]);

				// in case the tab titles now take up one line instead of two
				// lines
				this.layout();
			}

			if (this.selectedChildWidget === page) {
				this.selectedChildWidget = undefined;
				if (this._started) {
					var children = this.getChildren();
					if (children.length) {
						this.selectChild(children[0]);
					}
				}
			}
		},

		selectChild : function(/* Widget */page) {
			// summary:
			// Show the given widget (which must be one of my children)

			page = dijit.byId(page);

			if (this.selectedChildWidget != page) {
				// Deselect old page and select new one
				this._transition(page, this.selectedChildWidget);
				this.selectedChildWidget = page;
				dojo.publish(this.id + "-selectChild", [page]);
			}
		},

		_transition : function(/* Widget */newWidget, /* Widget */oldWidget) {
			if (oldWidget) {
				this._hideChild(oldWidget);
			}
			this._showChild(newWidget);

			// Size the new widget, in case this is the first time it's being
			// shown,
			// or I have been resized since the last time it was shown.
			// page must be visible for resizing to work
			if (this.doLayout && newWidget.resize) {
				newWidget.resize(this._containerContentBox || this._contentBox);
			}
		},

		_adjacent : function(/* Boolean */forward) {
			// summary: Gets the next/previous child widget in this container
			// from the current selection
			var children = this.getChildren();
			var index = dojo.indexOf(children, this.selectedChildWidget);
			index += forward ? 1 : children.length - 1;
			return children[index % children.length]; // dijit._Widget
		},

		forward : function() {
			// Summary: advance to next page
			this.selectChild(this._adjacent(true));
		},

		back : function() {
			// Summary: go back to previous page
			this.selectChild(this._adjacent(false));
		},

		_onKeyPress : function(e) {
			dojo.publish(this.id + "-containerKeyPress", [{
								e : e,
								page : this
							}]);
		},

		layout : function() {
			if (this.doLayout && this.selectedChildWidget
					&& this.selectedChildWidget.resize) {
				this.selectedChildWidget.resize(this._contentBox);
			}
		},

		_showChild : function(/* Widget */page) {
			var children = this.getChildren();
			page.isFirstChild = (page == children[0]);
			page.isLastChild = (page == children[children.length - 1]);
			page.selected = true;

			page.domNode.style.display = "";
			if (page._loadCheck) {
				page._loadCheck(); // trigger load in ContentPane
			}
			if (page.onShow) {
				page.onShow();
			}
		},

		_hideChild : function(/* Widget */page) {
			page.selected = false;
			page.domNode.style.display = "none";
			if (page.onHide) {
				page.onHide();
			}
		},

		closeChild : function(/* Widget */page) {
			// summary
			// callback when user clicks the [X] to remove a page
			// if onClose() returns true then remove and destroy the childd
			var remove = page.onClose(this, page);
			if (remove) {
				this.removeChild(page);
				// makes sure we can clean up executeScripts in ContentPane
				// onUnLoad
				page.destroy();
			}
		},

		destroy : function() {
			this._beingDestroyed = true;
			this.inherited("destroy", arguments);
		}
	});

	dojo.declare("dijit.layout.StackController", [dijit._Widget,
					dijit._Templated, dijit._Container], {
				// summary:
				// Set of buttons to select a page in a page list.
				// Monitors the specified StackContainer, and whenever a page is
				// added, deleted, or selected, updates itself accordingly.

				templateString : "<span wairole='tablist' dojoAttachEvent='onkeypress' class='dijitStackController'></span>",

				// containerId: String
				// the id of the page container that I point to
				containerId : "",

				// buttonWidget: String
				// the name of the button widget to create to correspond to each
				// page
				buttonWidget : "dijit.layout._StackButton",

				postCreate : function() {
					dijit.setWaiRole(this.domNode, "tablist");

					this.pane2button = {}; // mapping from panes to buttons
					this._subscriptions = [
							dojo.subscribe(this.containerId + "-startup", this,
									"onStartup"),
							dojo.subscribe(this.containerId + "-addChild",
									this, "onAddChild"),
							dojo.subscribe(this.containerId + "-removeChild",
									this, "onRemoveChild"),
							dojo.subscribe(this.containerId + "-selectChild",
									this, "onSelectChild"),
							dojo.subscribe(this.containerId
											+ "-containerKeyPress", this,
									"onContainerKeyPress")];
				},

				onStartup : function(/* Object */info) {
					// summary: called after StackContainer has finished
					// initializing
					dojo.forEach(info.children, this.onAddChild, this);
					this.onSelectChild(info.selected);
				},

				destroy : function() {
					dojo.forEach(this._subscriptions, dojo.unsubscribe);
					this.inherited("destroy", arguments);
				},

				onAddChild : function(/* Widget */page, /* Integer? */insertIndex) {
					// summary:
					// Called whenever a page is added to the container.
					// Create button corresponding to the page.

					// add a node that will be promoted to the button widget
					var refNode = document.createElement("span");
					this.domNode.appendChild(refNode);
					// create an instance of the button widget
					var cls = dojo.getObject(this.buttonWidget);
					var button = new cls({
								label : page.title,
								closeButton : page.closable
							}, refNode);
					this.addChild(button, insertIndex);
					this.pane2button[page] = button;
					page.controlButton = button; // this value might be
													// overwritten if two tabs
													// point to same container

					dojo.connect(button, "onClick", dojo.hitch(this,
									"onButtonClick", page));
					dojo.connect(button, "onClickCloseButton", dojo.hitch(this,
									"onCloseButtonClick", page));

					if (!this._currentChild) { // put the first child into the
												// tab order
						button.focusNode.setAttribute("tabIndex", "0");
						this._currentChild = page;
					}
				},

				onRemoveChild : function(/* Widget */page) {
					// summary:
					// Called whenever a page is removed from the container.
					// Remove the button corresponding to the page.
					if (this._currentChild === page) {
						this._currentChild = null;
					}
					var button = this.pane2button[page];
					if (button) {
						// TODO? if current child { reassign }
						button.destroy();
					}
					this.pane2button[page] = null;
				},

				onSelectChild : function(/* Widget */page) {
					// summary:
					// Called when a page has been selected in the
					// StackContainer, either by me or by another
					// StackController

					if (!page) {
						return;
					}

					if (this._currentChild) {
						var oldButton = this.pane2button[this._currentChild];
						oldButton.setChecked(false);
						oldButton.focusNode.setAttribute("tabIndex", "-1");
					}

					var newButton = this.pane2button[page];
					newButton.setChecked(true);
					this._currentChild = page;
					newButton.focusNode.setAttribute("tabIndex", "0");
				},

				onButtonClick : function(/* Widget */page) {
					// summary:
					// Called whenever one of my child buttons is pressed in an
					// attempt to select a page
					var container = dijit.byId(this.containerId); // TODO: do
																	// this via
																	// topics?
					container.selectChild(page);
				},

				onCloseButtonClick : function(/* Widget */page) {
					// summary:
					// Called whenever one of my child buttons [X] is pressed in
					// an attempt to close a page
					var container = dijit.byId(this.containerId);
					container.closeChild(page);
					var b = this.pane2button[this._currentChild];
					if (b) {
						dijit.focus(b.focusNode || b.domNode);
					}
				},

				// TODO: this is a bit redundant with forward, back api in
				// StackContainer
				adjacent : function(/* Boolean */forward) {
					// find currently focused button in children array
					var children = this.getChildren();
					var current = dojo.indexOf(children,
							this.pane2button[this._currentChild]);
					// pick next button to focus on
					var offset = forward ? 1 : children.length - 1;
					return children[(current + offset) % children.length]; // dijit._Widget
				},

				onkeypress : function(/* Event */e) {
					// summary:
					// Handle keystrokes on the page list, for advancing to
					// next/previous button
					// and closing the current page if the page is closable.

					if (this.disabled || e.altKey) {
						return;
					}
					var forward = true;
					if (e.ctrlKey || !e._djpage) {
						var k = dojo.keys;
						switch (e.keyCode) {
							case k.LEFT_ARROW :
							case k.UP_ARROW :
							case k.PAGE_UP :
								forward = false;
								// fall through
							case k.RIGHT_ARROW :
							case k.DOWN_ARROW :
							case k.PAGE_DOWN :
								this.adjacent(forward).onClick();
								dojo.stopEvent(e);
								break;
							case k.DELETE :
								if (this._currentChild.closable) {
									this.onCloseButtonClick(this._currentChild);
								}
								dojo.stopEvent(e);
								break;
							default :
								if (e.ctrlKey) {
									if (e.keyCode == k.TAB) {
										this.adjacent(!e.shiftKey).onClick();
										dojo.stopEvent(e);
									} else if (e.keyChar == "w") {
										if (this._currentChild.closable) {
											this
													.onCloseButtonClick(this._currentChild);
										}
										dojo.stopEvent(e); // avoid browser tab
															// closing.
									}
								}
						}
					}
				},

				onContainerKeyPress : function(/* Object */info) {
					info.e._djpage = info.page;
					this.onkeypress(info.e);
				}
			});

	dojo.declare("dijit.layout._StackButton", dijit.form.ToggleButton, {
				// summary
				// Internal widget used by StackContainer.
				// The button-like or tab-like object you click to select or
				// delete a page

				tabIndex : "-1", // StackContainer buttons are not in the tab
									// order by default

				postCreate : function(/* Event */evt) {
					dijit.setWaiRole((this.focusNode || this.domNode), "tab");
					this.inherited("postCreate", arguments);
				},

				onClick : function(/* Event */evt) {
					// summary: This is for TabContainer where the tabs are
					// <span> rather than button,
					// so need to set focus explicitly (on some browsers)
					dijit.focus(this.focusNode);

					// ... now let StackController catch the event and tell me
					// what to do
				},

				onClickCloseButton : function(/* Event */evt) {
					// summary
					// StackContainer connects to this function; if your widget
					// contains a close button
					// then clicking it should call this function.
					evt.stopPropagation();
				}
			});

	// These arguments can be specified for the children of a StackContainer.
	// Since any widget can be specified as a StackContainer child, mix them
	// into the base widget class. (This is a hack, but it's effective.)
	dojo.extend(dijit._Widget, {
				// title: String
				// Title of this widget. Used by TabContainer to the name the
				// tab, etc.
				title : "",

				// selected: Boolean
				// Is this child currently selected?
				selected : false,

				// closable: Boolean
				// True if user can close (destroy) this child, such as (for
				// example) clicking the X on the tab.
				closable : false, // true if user can close this tab pane

				onClose : function() {
					// summary: Callback if someone tries to close the child,
					// child will be closed if func returns true
					return true;
				}
			});

}