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(); 
```

  public void dispatchTableMenu(int left, int top) {


      MenuBar menu = new MenuBar(true);
      final PopupPanel menuPopup = new PopupPanel(true);
      
      menu.addItem(new MenuItem("Import...", new Command() {
      public void execute() {
        menuPopup.hide();
        dispatchImportAction();
      }
      }));
      menu.addItem(new MenuItem("Export...", new Command() {
      public void execute() {
        menuPopup.hide();
        exportContents();
      }
      }));

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  }
  
  private void _doSearch() {
    String searchString = getSearchString();
    enable(false);
    PortalControl.getInstance().searchOntologies(searchString, new Command() {
      public void execute() {
        enable(true);
        textBox.selectAll();
      }
    });

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      add(focusPanel);
    }


    protected void _processEnterEditing(final char firstKeyForEditing) {
      
      DeferredCommand.addCommand(new Command() {
        public void execute() {
          final TextArea ta = new TextArea();
          String text = contents.getText().trim();
          
          if ( firstKeyForEditing != 0 ) {

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  /**
   * Prepares the panel for creation of a new ontology using the vine style.
   */
  void createNewMappingOntology() {
    DeferredCommand.addCommand(new Command() {
      public void execute() {
        _getDefaultVineRelationInfosAndCreateNewMappingOntology();
      }
    });
  }

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      PortalControl.getInstance().notifyActivity(true);
      popup.center();
      popup.setText("Loading ontology contents ...");
      popup.show();
      
      _getOntologyContents(new Command() {
        public void execute() {
          log("reviewAndRegister: calling _doReviewAndRegister");
          _doReviewAndRegister(popup);
        }
      });

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    return ont_mb;
  }
  
  
  private MenuItem _createMenuItemCreateNewVersion() {
    return new MenuItem("Edit new version", new Command() {
      public void execute() {
        pctrl.editNewVersion();
      }
    });
  }

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    });


  }
  
  private MenuItem _createMenuItemVersions(final RegisteredOntologyInfo oi) {
    return new MenuItem("Versions", new Command() {
      public void execute() {
        launchVersions(oi);
      }
    });
  }

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   * @param text the menu item's text
   * @param cmd the command to trigger when the item is selected
   */
  public ExtendedMenuItem(AbstractImagePrototype icon, String text,
      final org.latexlab.docs.client.commands.Command cmd) {
    super("<span>" + icon.getHTML() + "</span> " + text, true, new Command() {
    @Override
    public void execute() {
          CommandEvent.fire(cmd);
    } 
    });

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      MenuBar menu = new MenuBar(true);
      final PopupPanel menuPopup = new PopupPanel(true);
      
      if ( row >= FIRST_REGULAR_ROW ) {
        menu.addItem(new MenuItem("Insert row above", new Command() {
          public void execute() {
            _insertRow(row, flexTable.getCellCount(row));
            menuPopup.hide();
          }
        }));
      }
      menu.addItem(new MenuItem("Insert row below", new Command() {
      public void execute() {
        _insertRow(row + 1, flexTable.getCellCount(row));
        menuPopup.hide();
      }
      }));
      
      if ( row >= FIRST_REGULAR_ROW ) {
        menu.addSeparator();
        menu.addItem(new MenuItem("Delete row", new Command() {
          public void execute() {
            _deleteRow(row);
            menuPopup.hide();
          }
        }));

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    int top = ww.getAbsoluteTop();


      MenuBar menu = new MenuBar(true);
      final PopupPanel menuPopup = new PopupPanel(true);
      
      menu.addItem(new MenuItem("Insert column right", new Command() {
      public void execute() {
        _insertCol(col + 1);
        menuPopup.hide();
      }
      }));
      menu.addItem(new MenuItem("Insert column left", new Command() {
      public void execute() {
        _insertCol(col);
        menuPopup.hide();
      }
      }));
      
      // do not allow to remove the client column if it's the only one:
      if ( flexTable.getCellCount(0) > 2 ) {
        menu.addSeparator();
        menu.addItem(new MenuItem("Delete column", new Command() {
        public void execute() {
          _deleteCol(col);
          menuPopup.hide();
        }
        }));

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