ProgressBar

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 h2. Overview
 _Since 3.0_
  
 Progress bar is a progress indicator that can work on the client side by itself or gets its progress update from the server using ajax.
  
 {tip}See the ICEfaces Showcase [Live Demo|http://icefaces-showcase.icesoft.org/showcase.jsf?grp=aceMenu&exp=progressBarBean] of this component, complete with source code.{tip}
  
  
 h2. Getting Started
  
 Client side only:
 {panel}
 {code:xml|borderStyle=dashed} <script type="text/javascript">
  function begin()
  {
   this.progressInterval = setInterval (
  function()
  {
  clientSideBar.setValue(clientSideBar.getValue() + 10);
  }
  , 2000);
  }
  
  function stop()
  {
  clearInterval(this.progressInterval);
  clientSideBar.setValue(0);
  }
  </script>
  ...
   <ace:panel>
  <ace:progressBar widgetVar="clientSideBar" />
  </ace:panel>
  ...
   <h:commandButton onclick="begin();" ... />
  <h:commandButton onclick="stop();" ... />
 {code}
 {panel}Client polling server:
 {panel}
 {code:xml|borderStyle=dashed} <ace:progressBar widgetVar="#{upload.widgetVarName}" usePolling="true" pollingInterval="2000" value="#{upload.progressValue}" ... />
  ...
  <h:commandButton onclick="#{upload.widgetVarName}.start();" ... />
 {code}
 {panel}
 h2. Attributes
 {tip:title=TagLib Documentation}This section covers attributes involved in the typical use-cases for this component. For reference, the complete taglib documentation for this component is available [here|http://www.icefaces.org/docs/v4_latest/ace/tld/ace/progressBar.html].{tip}
 {panel}
 *usePolling* specifies the mode of progressBar, in polling mode progress value is retrieved periodically from a backing bean.
 {panel}
 {panel}
 *cancelListener*, *changeListener*, *completeListener* are the listeners for the different stages of the progress. In the change event you can get the value and percentage of the progress bar.
 {panel}
 {panel}
 *pollingInterval* is time between polls to the server in milliseconds.
 {panel}
 h2. Event Listeners
  
 | changeListener | Listener to be invoked when the value of the progressbar changes. |
 | completeListener | Listener to be invoked when the value of the progressbar reaches the maximum value. |
 | cancelListener | Listener to be invoked when the progress process is cancelled by calling cancel(). |
  
 h2. Client Behavior Events
  
 | complete | Fired when the value of the progressbar reaches the maximum value (default event). |
 | cancel | Fired when the progress process is cancelled by calling cancel(). |
 | change | Fired when the value of the progressbar changes. |
  
 h2. JavaScript API
  
 The client side progress bar object is exposed through the global variable named by the *widgetVar* attribute. You can use the *getValue()* and *setValue()* methods to read and change the value. Use the *start()* and *cancel()* methods for polling. See Getting Started above for examples.
  
  
  
 h2. Keyboard Support
  h2. Keyboard and ARIA Support
  
 The following ARIA roles are supported: progressbar.
  
 h2. CSS Classes
  
 The following markup represents the basic HTML structure of the component and the CSS classes it uses.
  
 {code:xml}
 <div class="[user defined classes] ui-progressbar ui-widget ui-widget-content ui-corner-all" style="[user defined styles]">
  <div class="ui-progressbar-value ui-widget-header ui-corner-left"></div>
 </div>
 {code}
 h2. Known Issues
  
 None.
  
 h2. Additional Resources

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