org.jboss.errai.workspaces.client.api
Interface WidgetProvider

All Known Subinterfaces:

Tool

All Known Implementing Classes:

ToolImpl, WSLoginPanel

public interface WidgetProvider

Main interface for workspace tools. A workspace instance demands a widget from a provider when necessary. The callback allows for both synchronous and asynchronous creation of widgets when needed.

A typical pattern, leveraging the GWT 2.0 code spitting features looks like this:

 AT LoadTool(name="MyTool", group="MyToolsetGroup")
 class MyModule implements WidgetProvider {

 private static Widget instance = null;
  
 public void provideWidget(final ProvisioningCallback callback)
 {
   GWT.runAsync(
       new RunAsyncCallback()
       {
         public void onFailure(Throwable err)
         {
           GWT.log("Failed to load tool", err);
         }

         public void onSuccess()
         {
           if (null == instance) {
             instance = new HTML(""); // create your widget here
           }
           callback.onSuccess(instance);
         }
       }

   );
 }
 }
 

Method Summary

void	provideWidget(ProvisioningCallback callback)

Method Detail

provideWidget

void provideWidget(ProvisioningCallback callback)