--- /dev/null
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+<head>\r
+ <title>The source code</title>\r
+ <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />\r
+ <script type="text/javascript" src="../resources/prettify/prettify.js"></script>\r
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+<body onload="prettyPrint();">\r
+ <pre class="prettyprint lang-js"><div id="cls-Ext.util.TaskRunner"></div>/**
+ * @class Ext.util.TaskRunner
+ * Provides the ability to execute one or more arbitrary tasks in a multithreaded
+ * manner. Generally, you can use the singleton {@link Ext.TaskMgr} instead, but
+ * if needed, you can create separate instances of TaskRunner. Any number of
+ * separate tasks can be started at any time and will run independently of each
+ * other. Example usage:
+ * <pre><code>
+// Start a simple clock task that updates a div once per second
+var updateClock = function(){
+ Ext.fly('clock').update(new Date().format('g:i:s A'));
+}
+var task = {
+ run: updateClock,
+ interval: 1000 //1 second
+}
+var runner = new Ext.util.TaskRunner();
+runner.start(task);
+
+// equivalent using TaskMgr
+Ext.TaskMgr.start({
+ run: updateClock,
+ interval: 1000
+});
+
+ * </code></pre>
+ * Also see {@link Ext.util.DelayedTask}.
+ *
+ * @constructor
+ * @param {Number} interval (optional) The minimum precision in milliseconds supported by this TaskRunner instance
+ * (defaults to 10)
+ */
+Ext.util.TaskRunner = function(interval){
+ interval = interval || 10;
+ var tasks = [],
+ removeQueue = [],
+ id = 0,
+ running = false,
+
+ // private
+ stopThread = function(){
+ running = false;
+ clearInterval(id);
+ id = 0;
+ },
+
+ // private
+ startThread = function(){
+ if(!running){
+ running = true;
+ id = setInterval(runTasks, interval);
+ }
+ },
+
+ // private
+ removeTask = function(t){
+ removeQueue.push(t);
+ if(t.onStop){
+ t.onStop.apply(t.scope || t);
+ }
+ },
+
+ // private
+ runTasks = function(){
+ var rqLen = removeQueue.length,
+ now = new Date().getTime();
+
+ if(rqLen > 0){
+ for(var i = 0; i < rqLen; i++){
+ tasks.remove(removeQueue[i]);
+ }
+ removeQueue = [];
+ if(tasks.length < 1){
+ stopThread();
+ return;
+ }
+ }
+ for(var i = 0, t, itime, rt, len = tasks.length; i < len; ++i){
+ t = tasks[i];
+ itime = now - t.taskRunTime;
+ if(t.interval <= itime){
+ rt = t.run.apply(t.scope || t, t.args || [++t.taskRunCount]);
+ t.taskRunTime = now;
+ if(rt === false || t.taskRunCount === t.repeat){
+ removeTask(t);
+ return;
+ }
+ }
+ if(t.duration && t.duration <= (now - t.taskStartTime)){
+ removeTask(t);
+ }
+ }
+ };
+
+ <div id="method-Ext.util.TaskRunner-start"></div>/**
+ * Starts a new task.
+ * @method start
+ * @param {Object} task A config object that supports the following properties:<ul>
+ * <li><code>run</code> : Function<div class="sub-desc">The function to execute each time the task is run. The
+ * function will be called at each interval and passed the <code>args</code> argument if specified. If a
+ * particular scope is required, be sure to specify it using the <code>scope</code> argument.</div></li>
+ * <li><code>interval</code> : Number<div class="sub-desc">The frequency in milliseconds with which the task
+ * should be executed.</div></li>
+ * <li><code>args</code> : Array<div class="sub-desc">(optional) An array of arguments to be passed to the function
+ * specified by <code>run</code>.</div></li>
+ * <li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (<tt>this</tt> reference) in which to execute the
+ * <code>run</code> function. Defaults to the task config object.</div></li>
+ * <li><code>duration</code> : Number<div class="sub-desc">(optional) The length of time in milliseconds to execute
+ * the task before stopping automatically (defaults to indefinite).</div></li>
+ * <li><code>repeat</code> : Number<div class="sub-desc">(optional) The number of times to execute the task before
+ * stopping automatically (defaults to indefinite).</div></li>
+ * </ul>
+ * @return {Object} The task
+ */
+ this.start = function(task){
+ tasks.push(task);
+ task.taskStartTime = new Date().getTime();
+ task.taskRunTime = 0;
+ task.taskRunCount = 0;
+ startThread();
+ return task;
+ };
+
+ <div id="method-Ext.util.TaskRunner-stop"></div>/**
+ * Stops an existing running task.
+ * @method stop
+ * @param {Object} task The task to stop
+ * @return {Object} The task
+ */
+ this.stop = function(task){
+ removeTask(task);
+ return task;
+ };
+
+ <div id="method-Ext.util.TaskRunner-stopAll"></div>/**
+ * Stops all tasks that are currently running.
+ * @method stopAll
+ */
+ this.stopAll = function(){
+ stopThread();
+ for(var i = 0, len = tasks.length; i < len; i++){
+ if(tasks[i].onStop){
+ tasks[i].onStop();
+ }
+ }
+ tasks = [];
+ removeQueue = [];
+ };
+};
+
+<div id="cls-Ext.TaskMgr"></div>/**
+ * @class Ext.TaskMgr
+ * @extends Ext.util.TaskRunner
+ * A static {@link Ext.util.TaskRunner} instance that can be used to start and stop arbitrary tasks. See
+ * {@link Ext.util.TaskRunner} for supported methods and task config properties.
+ * <pre><code>
+// Start a simple clock task that updates a div once per second
+var task = {
+ run: function(){
+ Ext.fly('clock').update(new Date().format('g:i:s A'));
+ },
+ interval: 1000 //1 second
+}
+Ext.TaskMgr.start(task);
+</code></pre>
+ * @singleton
+ */
+Ext.TaskMgr = new Ext.util.TaskRunner();</pre> \r
+</body>\r
+</html>
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