Examples of com.google.gwt.user.client.Command

com.google.gwt.user.client.Command
Encapsulates an action for later execution, often from a different context.
The Command interface provides a layer of separation between the code specifying some behavior and the code invoking that behavior. This separation aids in creating reusable code. For example, a {@link com.google.gwt.user.client.ui.MenuItem} can have a Commandassociated with it that it executes when the menu item is chosen by the user. Importantly, the code that constructed the Command to be executed when the menu item is invoked knows nothing about the internals of the MenuItem class and vice-versa.

The Command interface is often implemented with an anonymous inner class. For example,
```
 Command sayHello = new Command() { public void execute() { Window.alert("Hello"); } }; sayHello.execute(); 
```

                    showCommunicationError(details, statusCode);
                    return true;
                }
            });
        } else if (!enabled && push != null && push.isActive()) {
            push.disconnect(new Command() {
                @Override
                public void execute() {
                    push = null;
                    /*
                     * If push has been enabled again while we were waiting for

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        view.setPopupPosition( getMargin(),
                activeNotifications.size() * SPACING );
        view.setNotification( event.getNotification() );
        view.setType( event.getType() );
        view.setNotificationWidth( getWidth() + "px" );
        view.show( new Command() {


            @Override
            public void execute() {
                //The notification has been shown and can now be removed
                deactiveNotifications.add( view );

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            boolean itemIsCheckable = item
                    .hasAttribute(MenuBarConstants.ATTRIBUTE_CHECKED);


            String itemHTML = getWidget().buildItemHTML(item);


            Command cmd = null;
            if (!item.hasAttribute("separator")) {
                if (itemHasCommand || itemIsCheckable) {
                    // Construct a command that fires onMenuClick(int) with the
                    // item's id-number
                    cmd = new Command() {
                        @Override
                        public void execute() {
                            getWidget().hostReference.onMenuClick(itemId);
                        }
                    };

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            if (fireCommand) {
                // Close this menu and all of its parents.
                closeAllParents();


                // Fire the item's command.
                final Command cmd = item.getCommand();
                if (cmd != null) {
                    Scheduler.get().scheduleDeferred(cmd);
                }
            }
            return;

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                    }
                    int tdWidth = w + scrollBody.getCellExtraWidth()
                            - borderWidths;
                    setWidth(Math.max(tdWidth, 0) + "px");
                } else {
                    Scheduler.get().scheduleDeferred(new Command() {


                        @Override
                        public void execute() {
                            int tdWidth = width;
                            int maxIndent = scrollBody.getMaxIndent();

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    }


    public void onDatasetAdded(final Dataset<S> dataset) {
      // forward event to external listeners
      for (final DatasetListener<S> l : this.datasets.listeners) {
        Command c = new ListenerCommand() {


          protected String getName() {
             return ON_DATASET_ADDED;
          }


          @Override
          public void execute() {
            l.onDatasetAdded(dataset);
          }




        };
        if (mutating == 0) {
          c.execute();
        } else {
            replaceCommand(pending,c);
        }
      }
    }

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      // affected them.
      this.datasets.updateAggregateInfo(dataset);


      // forward event to external listeners
      for (final DatasetListener<S> l : this.datasets.listeners) {
        Command c = new ListenerCommand() {


          protected String getName(){
             return ON_DATASET_CHANGED;
          }


          @Override
          public void execute() {
            l.onDatasetChanged(dataset, domainStart, domainEnd);
          }
        };
        if (mutating == 0) {
          c.execute();
        } else {
            replaceCommand(pending,c);
        }
      }
    }

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    public void onDatasetRemoved(final Dataset<S> dataset,
        final int datasetIndex) {
      // forward event to external listeners
      for (final DatasetListener<S> l : this.datasets.listeners) {
        Command c = new ListenerCommand() {


          protected String getName(){
             return ON_DATASET_REMOVED;
          }
          
          @Override
          public void execute() {
            l.onDatasetRemoved(dataset, datasetIndex);
          }
        };
        if (mutating == 0) {
          c.execute();
        } else {
           replaceCommand(pending,c);
        }
      }
    }

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  public void testCustomDateTimeFormat() {
     HTML data = new HTML(Fixtures.microformatData);
     RootPanel.get().add(data);
     delayTestFinish(15000);
     Chronoscope.setMicroformatsEnabled(true);
     Microformats.setMicroformatsReadyListener(new Command() {
       public void execute() {
         Chart c=Chronoscope.getChartById("microformatdemochrono");
         XYDataset xy = c.getPlot().getDataset(0);
         Date start = new Date(53, 0, 1, 0, 0, 0);
         Date end = new Date(64, 0, 1, 0, 0 ,0);

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    });
    GoogleLoader.load(new Chronoscope.URLResolver() {
      public String resolveURL(String url) {
        return intrinsics.getCachedUrl(url);
      }
    }, "visualization", "1", new Command() {


      public void execute() {
        ChronoscopeOptions.setErrorReporting(false);
        Chronoscope.setFontBookRendering(true);
        Query q=GadgetHelper.create().createQueryFromPrefs();

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