org.eclipse.swt.widgets.MenuItem#dispose ( )源码实例Demo

/**
 * Executed when the menu is shown: fills the group-menu
 */
@Override
public void handleEvent(Event event) {
	ProcessGrouping group = Viewers.getFirstSelected(groupViewer);
	if (group == null)
		return;
	for (MenuItem item : groupMoveMenu.getItems()) {
		item.removeSelectionListener(this);
		item.dispose();
	}
	List<ProcessGrouping> other = getOther(group);
	for (ProcessGrouping g : other) {
		MenuItem menuItem = new MenuItem(groupMoveMenu, SWT.PUSH);
		menuItem.setText(g.name);
		menuItem.setData(g);
		menuItem.addSelectionListener(this);
	}
}
 

private void createRecentAudiosMenu() {
	for (MenuItem mi : recentAudiosM.getItems())
		mi.dispose();

	CacheList<File> audioFilesCache = pmTrans.getRecentAudios();
	for (int i = 0; i < audioFilesCache.size(); i++)
		addMenuItem(recentAudiosM, audioFilesCache.get(i).getName(),
				SWT.NONE, audioFilesCache.get(i), new SelectionAdapter() {
					@Override
					public void widgetSelected(SelectionEvent e) {
						pmTrans.openAudioFile((File) ((MenuItem) e
								.getSource()).getData());
					}
				});
}
 

private void createRecentTextsMenu() {
	for (MenuItem mi : recentTextsM.getItems())
		mi.dispose();

	CacheList<File> textFilesCache = pmTrans.getRecentTrasncriptions();
	for (int i = 0; i < textFilesCache.size(); i++)
		addMenuItem(recentTextsM, textFilesCache.get(i).getName(),
				SWT.NONE, textFilesCache.get(i), new SelectionAdapter() {
					@Override
					public void widgetSelected(SelectionEvent e) {
						pmTrans.openTranscriptionFile((File) ((MenuItem) e
								.getSource()).getData());
					}
				});
}
 

public static void
 addCopyToClipMenu(
final Menu		menu,
final String	text )
 {
  for ( MenuItem e: menu.getItems()){
	  
	  if ( e.getData( MENU_ITEM_KEY ) != null ){
		  
		  e.dispose();
	  }
  }
  
  MenuItem   item = new MenuItem( menu,SWT.NONE );

  item.setData( MENU_ITEM_KEY, "" );

  String	msg_text_id= "label.copy.to.clipboard";

  item.setText( MessageText.getString( msg_text_id ));

  item.addSelectionListener(
	  new SelectionAdapter()
	  {
		  @Override
		  public void
		  widgetSelected(
				  SelectionEvent arg0)
		  {
			  new Clipboard(menu.getDisplay()).setContents(new Object[] {text}, new Transfer[] {TextTransfer.getInstance()});
		  }
	  });
 }
 

public static void
 addCopyToClipMenu(
final Menu					menu,
final copyToClipProvider	provider )
 {
  for ( MenuItem e: menu.getItems()){
	  
	  if ( e.getData( MENU_ITEM_KEY ) != null ){
		  
		  e.dispose();
	  }
  }
  
  MenuItem   item = new MenuItem( menu,SWT.NONE );

  item.setData( MENU_ITEM_KEY, "" );
  
  String	msg_text_id= "label.copy.to.clipboard";

  item.setText( MessageText.getString( msg_text_id ));

  item.addSelectionListener(
	  new SelectionAdapter()
	  {
		  @Override
		  public void
		  widgetSelected(
				  SelectionEvent arg0)
		  {
			  new Clipboard(menu.getDisplay()).setContents(new Object[] { provider.getText()}, new Transfer[] {TextTransfer.getInstance()});
		  }
	  });
 }
 

public static void
 removeCopyToClipMenu(
final Menu					menu )
 {
  for ( MenuItem e: menu.getItems()){
	  
	  if ( e.getData( MENU_ITEM_KEY ) != null ){
		  
		  e.dispose();
	  }
  }	
 }
 

private void removeMenuItemWithDisplayText(final String text, final Menu menu) {
	final MenuItem[] items = menu.getItems();
	
	for (final MenuItem item : items) {
		final String menuItemText = item.getText();
		
		if ((menuItemText != null) && menuItemText.startsWith(text)) {
			item.dispose();
			
			return;
		}
	}
}
 

public void reset() {
	if (mainMenu != null && !mainMenu.isDisposed()) {
		for (final MenuItem item : mainMenu.getItems()) {
			item.dispose();
		}
	}
}
 

protected void disposeMenuItems() {
	if (fMenu == null || fMenu.isDisposed()) {
		return;
	}
	MenuItem[] items = fMenu.getItems();
	for (int i=0; i < items.length; i++) {
		MenuItem menuItem= items[i];
		if (!menuItem.isDisposed()) {
			menuItem.dispose();
		}
	}
}
 

/**
 * Removes and disposes of all of the IAnalysisViews for a particular
 * DataSource.
 * 
 * @param dataSource
 *            The DataSource whose Views need to be removed.
 * @param factory
 *            The factory used to generate the IAnalysisViews for the
 *            DataSource.
 */
private void removeViews(DataSource dataSource,
		IAnalysisWidgetFactory factory) {
	logger.info("AnalysisToolComposite message: "
			+ "Removing views for data source " + dataSource);

	// Get the list of available views.
	List<String> viewNames = factory.getAvailableViews(dataSource);

	// Disable the dataSource's view menu Item. (The dataSource
	// should *always* be a key in the map.)
	MenuItem dataSourceItem = dataSourceItems.get(dataSource);
	dataSourceItem.setEnabled(false);

	// Dispose of all MenuItems from the dataSource's view Menu.
	Menu dataSourceMenu = dataSourceItem.getMenu();
	for (MenuItem item : dataSourceMenu.getItems()) {
		item.dispose();
	}

	// Dispose of the ViewPart for each view.
	for (String viewName : viewNames) {
		logger.info(
				"AnalysisToolComposite message: Removing view " + viewName);

		ViewPart viewPart = viewPartMap.remove(dataSource + "-" + viewName);
		if (viewPart != null) {
			viewPart.dispose();
		}
	}

	return;
}