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107 lines
3.2 KiB
JavaScript
107 lines
3.2 KiB
JavaScript
dojo.provide("dojox.widget.Loader");
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dojo.deprecated("dojox.widget.Loader", "", "2.0");
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dojo.require("dijit._Widget");
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dojo.require("dijit._Templated");
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dojo.declare("dojox.widget.Loader", [dijit._Widget,dijit._Templated], {
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// summary: a configurable global xhr-listener to display
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// a loading message during running xhr's or to simply provide
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// base-level topic to subscribe to for custom loading messages
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//
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// loadIcon: String
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// location to the icon used.
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loadIcon: dojo.moduleUrl("dojox.widget.Loader","icons/loading.gif"),
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// loadMessage: String
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// string to use for progress loading
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loadMessage: 'Loading ...',
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// hasVisuals: Boolean
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// true to display a fixed loading message in TR cornder, false to unly provide
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// "Loader" topic to subscribe to for your own custom loading message.
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hasVisuals: true,
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// attachToPointer
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// true to use visual indicator where cursor is
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attachToPointer: true,
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// duration: Integer
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// time in ms to toggle in/out the visual load indicator
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duration: 125,
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// _offset: Integer
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// distance in px from the mouse pointer to show attachToPointer avatar
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_offset: 16,
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// holder for mousemove connection
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_pointerConnect: null,
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_xhrStart: null,
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_xhrEnd: null,
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templateString: '<div dojoAttachPoint="loadNode" class="dojoxLoader">'
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+'<img src="${loadIcon}" class="dojoxLoaderIcon"> <span dojoAttachPoint="loadMessageNode" class="dojoxLoaderMessage"></span>'
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+'</div>',
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postCreate: function(){
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// summary: setup the loader
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if(!this.hasVisuals){
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this.loadNode.style.display = "none"; // _destroy()?
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}else{
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if(this.attachToPointer){
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dojo.removeClass(this.loadNode,"dojoxLoader");
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dojo.addClass(this.loadNode,"dojoxLoaderPointer");
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}
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this._hide();
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}
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this._setMessage(this.loadMessage);
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// FIXME: create our connections. would be easier, and this might be redundant
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// if Deferred published something
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this._xhrStart = this.connect(dojo,"_ioSetArgs","_show");
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this._xhrEnd = this.connect(dojo.Deferred.prototype,"_fire","_hide");
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},
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_setMessage: function(/* String */ message){
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// summary: set's the message in the loader
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this.loadMessageNode.innerHTML = message;
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},
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_putLoader: function(/* Event */ e){
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// summary: place the floating loading element based on mousemove connection position
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dijit.placeOnScreen(this.loadNode,{ x: e.clientX+this._offset, y:e.clientY+this._offset }, ["TL","BR"]);
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},
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_show: function(){
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// summary: publish and show progress indicator
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dojo.publish("Loader",[{ message: 'started' }]);
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if(this.hasVisuals){
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if(this.attachToPointer){
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this._pointerConnect = this.connect(document,"onmousemove","_putLoader");
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}
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dojo.style(this.loadNode, {
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opacity:0, display:""
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});
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dojo.fadeIn({ node: this.loadNode, duration:this.duration }).play();
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}
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},
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_hide: function(){
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// summary: publish "xhr ended" and hide progress indicator
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dojo.publish("Loader",[{ message: 'ended' }]);
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if(this.hasVisuals){
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if(this.attachToPointer){
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this.disconnect(this._pointerConnect);
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}
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dojo.fadeOut({
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node: this.loadNode,
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duration:this.duration,
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onEnd: dojo.partial(dojo.style, this.loadNode, "display", "none")
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}).play();
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}
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}
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});
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