651 lines
20 KiB
JavaScript
651 lines
20 KiB
JavaScript
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dojo.provide("dijit.layout.ContentPane");
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dojo.require("dijit._Widget");
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dojo.require("dijit._Contained");
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dojo.require("dijit.layout._LayoutWidget"); // for dijit.layout.marginBox2contentBox()
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dojo.require("dojo.parser");
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dojo.require("dojo.string");
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dojo.require("dojo.html");
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dojo.requireLocalization("dijit", "loading");
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dojo.declare(
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"dijit.layout.ContentPane", dijit._Widget,
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{
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// summary:
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// A widget that acts as a container for mixed HTML and widgets, and includes an Ajax interface
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// description:
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// A widget that can be used as a standalone widget
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// or as a baseclass for other widgets
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// Handles replacement of document fragment using either external uri or javascript
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// generated markup or DOM content, instantiating widgets within that content.
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// Don't confuse it with an iframe, it only needs/wants document fragments.
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// It's useful as a child of LayoutContainer, SplitContainer, or TabContainer.
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// But note that those classes can contain any widget as a child.
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// example:
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// Some quick samples:
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// To change the innerHTML use .attr('content', '<b>new content</b>')
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//
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// Or you can send it a NodeList, .attr('content', dojo.query('div [class=selected]', userSelection))
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// please note that the nodes in NodeList will copied, not moved
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//
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// To do a ajax update use .attr('href', url)
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// href: String
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// The href of the content that displays now.
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// Set this at construction if you want to load data externally when the
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// pane is shown. (Set preload=true to load it immediately.)
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// Changing href after creation doesn't have any effect; use attr('href', ...);
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href: "",
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/*=====
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// content: String || DomNode || NodeList || dijit._Widget
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// The innerHTML of the ContentPane.
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// Note that the initialization parameter / argument to attr("content", ...)
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// can be a String, DomNode, Nodelist, or _Widget.
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content: "",
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=====*/
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// extractContent: Boolean
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// Extract visible content from inside of <body> .... </body>.
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// I.e., strip <html> and <head> (and it's contents) from the href
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extractContent: false,
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// parseOnLoad: Boolean
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// Parse content and create the widgets, if any.
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parseOnLoad: true,
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// preventCache: Boolean
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// Prevent caching of data from href's by appending a timestamp to the href.
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preventCache: false,
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// preload: Boolean
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// Force load of data on initialization even if pane is hidden.
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preload: false,
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// refreshOnShow: Boolean
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// Refresh (re-download) content when pane goes from hidden to shown
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refreshOnShow: false,
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// loadingMessage: String
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// Message that shows while downloading
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loadingMessage: "<span class='dijitContentPaneLoading'>${loadingState}</span>",
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// errorMessage: String
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// Message that shows if an error occurs
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errorMessage: "<span class='dijitContentPaneError'>${errorState}</span>",
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// isLoaded: [readonly] Boolean
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// True if the ContentPane has data in it, either specified
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// during initialization (via href or inline content), or set
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// via attr('content', ...) / attr('href', ...)
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//
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// False if it doesn't have any content, or if ContentPane is
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// still in the process of downloading href.
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isLoaded: false,
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baseClass: "dijitContentPane",
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// doLayout: Boolean
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// - false - don't adjust size of children
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// - true - if there is a single visible child widget, set it's size to
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// however big the ContentPane is
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doLayout: true,
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// ioArgs: Object
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// Parameters to pass to xhrGet() request, for example:
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// | <div dojoType="dijit.layout.ContentPane" href="./bar" ioArgs="{timeout: 500}">
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ioArgs: {},
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// isContainer: [protected] Boolean
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// Just a flag indicating that this widget will call resize() on
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// its children. _LayoutWidget based widgets check for
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//
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// | if(!this.getParent || !this.getParent()){
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//
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// and if getParent() returns false because !parent.isContainer,
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// then they resize themselves on initialization.
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isContainer: true,
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postMixInProperties: function(){
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this.inherited(arguments);
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var messages = dojo.i18n.getLocalization("dijit", "loading", this.lang);
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this.loadingMessage = dojo.string.substitute(this.loadingMessage, messages);
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this.errorMessage = dojo.string.substitute(this.errorMessage, messages);
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// Detect if we were initialized with data
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if(!this.href && this.srcNodeRef && this.srcNodeRef.innerHTML){
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this.isLoaded = true;
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}
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},
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buildRendering: function(){
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// Overrides Widget.buildRendering().
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// Since we have no template we need to set this.containerNode ourselves.
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// For subclasses of ContentPane do have a template, does nothing.
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this.inherited(arguments);
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if(!this.containerNode){
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// make getDescendants() work
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this.containerNode = this.domNode;
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}
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},
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postCreate: function(){
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// remove the title attribute so it doesn't show up when hovering
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// over a node
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this.domNode.title = "";
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if (!dojo.attr(this.domNode,"role")){
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dijit.setWaiRole(this.domNode, "group");
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}
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dojo.addClass(this.domNode, this.baseClass);
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},
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startup: function(){
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// summary:
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// See `dijit.layout._LayoutWidget.startup` for description.
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// Although ContentPane doesn't extend _LayoutWidget, it does implement
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// the same API.
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if(this._started){ return; }
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if(this.isLoaded){
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dojo.forEach(this.getChildren(), function(child){
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child.startup();
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});
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// If we have static content in the content pane (specified during
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// initialization) then we need to do layout now... unless we are
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// a child of a TabContainer etc. in which case wait until the TabContainer
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// calls resize() on us.
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if(this.doLayout){
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this._checkIfSingleChild();
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}
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if(!this._singleChild || !dijit._Contained.prototype.getParent.call(this)){
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this._scheduleLayout();
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}
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}
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// If we have an href then check if we should load it now
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this._loadCheck();
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this.inherited(arguments);
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},
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_checkIfSingleChild: function(){
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// summary:
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// Test if we have exactly one visible widget as a child,
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// and if so assume that we are a container for that widget,
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// and should propogate startup() and resize() calls to it.
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// Skips over things like data stores since they aren't visible.
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var childNodes = dojo.query(">", this.containerNode),
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childWidgetNodes = childNodes.filter(function(node){
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return dojo.hasAttr(node, "dojoType") || dojo.hasAttr(node, "widgetId");
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}),
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candidateWidgets = dojo.filter(childWidgetNodes.map(dijit.byNode), function(widget){
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return widget && widget.domNode && widget.resize;
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});
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if(
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// all child nodes are widgets
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childNodes.length == childWidgetNodes.length &&
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// all but one are invisible (like dojo.data)
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candidateWidgets.length == 1
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){
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this._singleChild = candidateWidgets[0];
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}else{
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delete this._singleChild;
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}
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},
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setHref: function(/*String|Uri*/ href){
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// summary:
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// Deprecated. Use attr('href', ...) instead.
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dojo.deprecated("dijit.layout.ContentPane.setHref() is deprecated. Use attr('href', ...) instead.", "", "2.0");
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return this.attr("href", href);
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},
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_setHrefAttr: function(/*String|Uri*/ href){
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// summary:
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// Hook so attr("href", ...) works.
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// description:
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// Reset the (external defined) content of this pane and replace with new url
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// Note: It delays the download until widget is shown if preload is false.
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// href:
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// url to the page you want to get, must be within the same domain as your mainpage
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// Cancel any in-flight requests (an attr('href') will cancel any in-flight attr('href', ...))
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this.cancel();
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this.href = href;
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// _setHrefAttr() is called during creation and by the user, after creation.
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// only in the second case do we actually load the URL; otherwise it's done in startup()
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if(this._created && (this.preload || this._isShown())){
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// we return result of refresh() here to avoid code dup. in dojox.layout.ContentPane
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return this.refresh();
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}else{
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// Set flag to indicate that href needs to be loaded the next time the
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// ContentPane is made visible
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this._hrefChanged = true;
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}
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},
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setContent: function(/*String|DomNode|Nodelist*/data){
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// summary:
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// Deprecated. Use attr('content', ...) instead.
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dojo.deprecated("dijit.layout.ContentPane.setContent() is deprecated. Use attr('content', ...) instead.", "", "2.0");
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this.attr("content", data);
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},
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_setContentAttr: function(/*String|DomNode|Nodelist*/data){
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// summary:
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// Hook to make attr("content", ...) work.
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// Replaces old content with data content, include style classes from old content
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// data:
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// the new Content may be String, DomNode or NodeList
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//
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// if data is a NodeList (or an array of nodes) nodes are copied
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// so you can import nodes from another document implicitly
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// clear href so we can't run refresh and clear content
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// refresh should only work if we downloaded the content
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this.href = "";
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// Cancel any in-flight requests (an attr('content') will cancel any in-flight attr('href', ...))
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this.cancel();
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this._setContent(data || "");
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this._isDownloaded = false; // mark that content is from a attr('content') not an attr('href')
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},
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_getContentAttr: function(){
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// summary:
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// Hook to make attr("content") work
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return this.containerNode.innerHTML;
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},
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cancel: function(){
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// summary:
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// Cancels an in-flight download of content
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if(this._xhrDfd && (this._xhrDfd.fired == -1)){
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this._xhrDfd.cancel();
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}
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delete this._xhrDfd; // garbage collect
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},
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uninitialize: function(){
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if(this._beingDestroyed){
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this.cancel();
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}
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},
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destroyRecursive: function(/*Boolean*/ preserveDom){
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// summary:
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// Destroy the ContentPane and its contents
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// if we have multiple controllers destroying us, bail after the first
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if(this._beingDestroyed){
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return;
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}
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this._beingDestroyed = true;
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this.inherited(arguments);
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},
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resize: function(size){
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// summary:
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// See `dijit.layout._LayoutWidget.resize` for description.
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// Although ContentPane doesn't extend _LayoutWidget, it does implement
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// the same API.
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dojo.marginBox(this.domNode, size);
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// Compute content box size in case we [later] need to size child
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// If either height or width wasn't specified by the user, then query node for it.
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// But note that setting the margin box and then immediately querying dimensions may return
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// inaccurate results, so try not to depend on it.
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var node = this.containerNode,
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mb = dojo.mixin(dojo.marginBox(node), size||{});
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var cb = (this._contentBox = dijit.layout.marginBox2contentBox(node, mb));
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// If we have a single widget child then size it to fit snugly within my borders
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if(this._singleChild && this._singleChild.resize){
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// note: if widget has padding this._contentBox will have l and t set,
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// but don't pass them to resize() or it will doubly-offset the child
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this._singleChild.resize({w: cb.w, h: cb.h});
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}
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},
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_isShown: function(){
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// summary:
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// Returns true if the content is currently shown
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if("open" in this){
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return this.open; // for TitlePane, etc.
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}else{
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var node = this.domNode;
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return (node.style.display != 'none') && (node.style.visibility != 'hidden') && !dojo.hasClass(node, "dijitHidden");
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}
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},
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_onShow: function(){
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// summary:
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// Called when the ContentPane is made visible
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// description:
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// For a plain ContentPane, this is called on initialization, from startup().
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// If the ContentPane is a hidden pane of a TabContainer etc., then it's
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// called whever the pane is made visible.
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//
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// Does processing necessary, including href download and layout/resize of
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// child widget(s)
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if(this._needLayout){
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// If a layout has been scheduled for when we become visible, do it now
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this._layoutChildren();
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}
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// Do lazy-load of URL
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this._loadCheck();
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// call onShow, if we have one
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if(this.onShow){
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this.onShow();
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}
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},
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_loadCheck: function(){
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// summary:
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// Call this to load href contents if necessary.
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// description:
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// Call when !ContentPane has been made visible [from prior hidden state],
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// or href has been changed, or on startup, etc.
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if(
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(this.href && !this._xhrDfd) && // if there's an href that isn't already being loaded
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(!this.isLoaded || this._hrefChanged || this.refreshOnShow) && // and we need a [re]load
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(this.preload || this._isShown()) // and now is the time to [re]load
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){
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delete this._hrefChanged;
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this.refresh();
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}
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},
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refresh: function(){
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// summary:
|
||
|
|
// [Re]download contents of href and display
|
||
|
|
// description:
|
||
|
|
// 1. cancels any currently in-flight requests
|
||
|
|
// 2. posts "loading..." message
|
||
|
|
// 3. sends XHR to download new data
|
||
|
|
|
||
|
|
// cancel possible prior inflight request
|
||
|
|
this.cancel();
|
||
|
|
|
||
|
|
// display loading message
|
||
|
|
this._setContent(this.onDownloadStart(), true);
|
||
|
|
|
||
|
|
var self = this;
|
||
|
|
var getArgs = {
|
||
|
|
preventCache: (this.preventCache || this.refreshOnShow),
|
||
|
|
url: this.href,
|
||
|
|
handleAs: "text"
|
||
|
|
};
|
||
|
|
if(dojo.isObject(this.ioArgs)){
|
||
|
|
dojo.mixin(getArgs, this.ioArgs);
|
||
|
|
}
|
||
|
|
|
||
|
|
var hand = (this._xhrDfd = (this.ioMethod || dojo.xhrGet)(getArgs));
|
||
|
|
|
||
|
|
hand.addCallback(function(html){
|
||
|
|
try{
|
||
|
|
self._isDownloaded = true;
|
||
|
|
self._setContent(html, false);
|
||
|
|
self.onDownloadEnd();
|
||
|
|
}catch(err){
|
||
|
|
self._onError('Content', err); // onContentError
|
||
|
|
}
|
||
|
|
delete self._xhrDfd;
|
||
|
|
return html;
|
||
|
|
});
|
||
|
|
|
||
|
|
hand.addErrback(function(err){
|
||
|
|
if(!hand.canceled){
|
||
|
|
// show error message in the pane
|
||
|
|
self._onError('Download', err); // onDownloadError
|
||
|
|
}
|
||
|
|
delete self._xhrDfd;
|
||
|
|
return err;
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
_onLoadHandler: function(data){
|
||
|
|
// summary:
|
||
|
|
// This is called whenever new content is being loaded
|
||
|
|
this.isLoaded = true;
|
||
|
|
try{
|
||
|
|
this.onLoad(data);
|
||
|
|
}catch(e){
|
||
|
|
console.error('Error '+this.widgetId+' running custom onLoad code: ' + e.message);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_onUnloadHandler: function(){
|
||
|
|
// summary:
|
||
|
|
// This is called whenever the content is being unloaded
|
||
|
|
this.isLoaded = false;
|
||
|
|
try{
|
||
|
|
this.onUnload();
|
||
|
|
}catch(e){
|
||
|
|
console.error('Error '+this.widgetId+' running custom onUnload code: ' + e.message);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
destroyDescendants: function(){
|
||
|
|
// summary:
|
||
|
|
// Destroy all the widgets inside the ContentPane and empty containerNode
|
||
|
|
|
||
|
|
// Make sure we call onUnload (but only when the ContentPane has real content)
|
||
|
|
if(this.isLoaded){
|
||
|
|
this._onUnloadHandler();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Even if this.isLoaded == false there might still be a "Loading..." message
|
||
|
|
// to erase, so continue...
|
||
|
|
|
||
|
|
// For historical reasons we need to delete all widgets under this.containerNode,
|
||
|
|
// even ones that the user has created manually.
|
||
|
|
var setter = this._contentSetter;
|
||
|
|
dojo.forEach(this.getChildren(), function(widget){
|
||
|
|
if(widget.destroyRecursive){
|
||
|
|
widget.destroyRecursive();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
if(setter){
|
||
|
|
// Most of the widgets in setter.parseResults have already been destroyed, but
|
||
|
|
// things like Menu that have been moved to <body> haven't yet
|
||
|
|
dojo.forEach(setter.parseResults, function(widget){
|
||
|
|
if(widget.destroyRecursive && widget.domNode && widget.domNode.parentNode == dojo.body()){
|
||
|
|
widget.destroyRecursive();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
delete setter.parseResults;
|
||
|
|
}
|
||
|
|
|
||
|
|
// And then clear away all the DOM nodes
|
||
|
|
dojo.html._emptyNode(this.containerNode);
|
||
|
|
},
|
||
|
|
|
||
|
|
_setContent: function(cont, isFakeContent){
|
||
|
|
// summary:
|
||
|
|
// Insert the content into the container node
|
||
|
|
|
||
|
|
// first get rid of child widgets
|
||
|
|
this.destroyDescendants();
|
||
|
|
|
||
|
|
// Delete any state information we have about current contents
|
||
|
|
delete this._singleChild;
|
||
|
|
|
||
|
|
// dojo.html.set will take care of the rest of the details
|
||
|
|
// we provide an overide for the error handling to ensure the widget gets the errors
|
||
|
|
// configure the setter instance with only the relevant widget instance properties
|
||
|
|
// NOTE: unless we hook into attr, or provide property setters for each property,
|
||
|
|
// we need to re-configure the ContentSetter with each use
|
||
|
|
var setter = this._contentSetter;
|
||
|
|
if(! (setter && setter instanceof dojo.html._ContentSetter)) {
|
||
|
|
setter = this._contentSetter = new dojo.html._ContentSetter({
|
||
|
|
node: this.containerNode,
|
||
|
|
_onError: dojo.hitch(this, this._onError),
|
||
|
|
onContentError: dojo.hitch(this, function(e){
|
||
|
|
// fires if a domfault occurs when we are appending this.errorMessage
|
||
|
|
// like for instance if domNode is a UL and we try append a DIV
|
||
|
|
var errMess = this.onContentError(e);
|
||
|
|
try{
|
||
|
|
this.containerNode.innerHTML = errMess;
|
||
|
|
}catch(e){
|
||
|
|
console.error('Fatal '+this.id+' could not change content due to '+e.message, e);
|
||
|
|
}
|
||
|
|
})/*,
|
||
|
|
_onError */
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
var setterParams = dojo.mixin({
|
||
|
|
cleanContent: this.cleanContent,
|
||
|
|
extractContent: this.extractContent,
|
||
|
|
parseContent: this.parseOnLoad
|
||
|
|
}, this._contentSetterParams || {});
|
||
|
|
|
||
|
|
dojo.mixin(setter, setterParams);
|
||
|
|
|
||
|
|
setter.set( (dojo.isObject(cont) && cont.domNode) ? cont.domNode : cont );
|
||
|
|
|
||
|
|
// setter params must be pulled afresh from the ContentPane each time
|
||
|
|
delete this._contentSetterParams;
|
||
|
|
|
||
|
|
if(!isFakeContent){
|
||
|
|
dojo.forEach(this.getChildren(), function(child){
|
||
|
|
child.startup();
|
||
|
|
});
|
||
|
|
|
||
|
|
if(this.doLayout){
|
||
|
|
this._checkIfSingleChild();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call resize() on each of my child layout widgets,
|
||
|
|
// or resize() on my single child layout widget...
|
||
|
|
// either now (if I'm currently visible)
|
||
|
|
// or when I become visible
|
||
|
|
this._scheduleLayout();
|
||
|
|
|
||
|
|
this._onLoadHandler(cont);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_onError: function(type, err, consoleText){
|
||
|
|
// shows user the string that is returned by on[type]Error
|
||
|
|
// overide on[type]Error and return your own string to customize
|
||
|
|
var errText = this['on' + type + 'Error'].call(this, err);
|
||
|
|
if(consoleText){
|
||
|
|
console.error(consoleText, err);
|
||
|
|
}else if(errText){// a empty string won't change current content
|
||
|
|
this._setContent(errText, true);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_scheduleLayout: function(){
|
||
|
|
// summary:
|
||
|
|
// Call resize() on each of my child layout widgets, either now
|
||
|
|
// (if I'm currently visible) or when I become visible
|
||
|
|
if(this._isShown()){
|
||
|
|
this._layoutChildren();
|
||
|
|
}else{
|
||
|
|
this._needLayout = true;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_layoutChildren: function(){
|
||
|
|
// summary:
|
||
|
|
// Since I am a Container widget, each of my children expects me to
|
||
|
|
// call resize() or layout() on them.
|
||
|
|
// description:
|
||
|
|
// Should be called on initialization and also whenever we get new content
|
||
|
|
// (from an href, or from attr('content', ...))... but deferred until
|
||
|
|
// the ContentPane is visible
|
||
|
|
|
||
|
|
if(this._singleChild && this._singleChild.resize){
|
||
|
|
var cb = this._contentBox || dojo.contentBox(this.containerNode);
|
||
|
|
this._singleChild.resize({w: cb.w, h: cb.h});
|
||
|
|
}else{
|
||
|
|
// All my child widgets are independently sized (rather than matching my size),
|
||
|
|
// but I still need to call resize() on each child to make it layout.
|
||
|
|
dojo.forEach(this.getChildren(), function(widget){
|
||
|
|
if(widget.resize){
|
||
|
|
widget.resize();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
delete this._needLayout;
|
||
|
|
},
|
||
|
|
|
||
|
|
// EVENT's, should be overide-able
|
||
|
|
onLoad: function(data){
|
||
|
|
// summary:
|
||
|
|
// Event hook, is called after everything is loaded and widgetified
|
||
|
|
// tags:
|
||
|
|
// callback
|
||
|
|
},
|
||
|
|
|
||
|
|
onUnload: function(){
|
||
|
|
// summary:
|
||
|
|
// Event hook, is called before old content is cleared
|
||
|
|
// tags:
|
||
|
|
// callback
|
||
|
|
},
|
||
|
|
|
||
|
|
onDownloadStart: function(){
|
||
|
|
// summary:
|
||
|
|
// Called before download starts.
|
||
|
|
// description:
|
||
|
|
// The string returned by this function will be the html
|
||
|
|
// that tells the user we are loading something.
|
||
|
|
// Override with your own function if you want to change text.
|
||
|
|
// tags:
|
||
|
|
// extension
|
||
|
|
return this.loadingMessage;
|
||
|
|
},
|
||
|
|
|
||
|
|
onContentError: function(/*Error*/ error){
|
||
|
|
// summary:
|
||
|
|
// Called on DOM faults, require faults etc. in content.
|
||
|
|
//
|
||
|
|
// In order to display an error message in the pane, return
|
||
|
|
// the error message from this method, as an HTML string.
|
||
|
|
//
|
||
|
|
// By default (if this method is not overriden), it returns
|
||
|
|
// nothing, so the error message is just printed to the console.
|
||
|
|
// tags:
|
||
|
|
// extension
|
||
|
|
},
|
||
|
|
|
||
|
|
onDownloadError: function(/*Error*/ error){
|
||
|
|
// summary:
|
||
|
|
// Called when download error occurs.
|
||
|
|
//
|
||
|
|
// In order to display an error message in the pane, return
|
||
|
|
// the error message from this method, as an HTML string.
|
||
|
|
//
|
||
|
|
// Default behavior (if this method is not overriden) is to display
|
||
|
|
// the error message inside the pane.
|
||
|
|
// tags:
|
||
|
|
// extension
|
||
|
|
return this.errorMessage;
|
||
|
|
},
|
||
|
|
|
||
|
|
onDownloadEnd: function(){
|
||
|
|
// summary:
|
||
|
|
// Called when download is finished.
|
||
|
|
// tags:
|
||
|
|
// callback
|
||
|
|
}
|
||
|
|
});
|