Java Tutorial/SWT/PopupMenu

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Add One Popup Menu to two different Controls

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; public class PopupMenuAddTwoControls { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   
   Composite c1 = new Composite(shell, SWT.BORDER);
   c1.setSize(100, 100);
   
   Composite c2 = new Composite(shell, SWT.BORDER);
   c2.setBounds(100, 0, 100, 100);
   
   Menu menu = new Menu(shell, SWT.POP_UP);
   MenuItem item = new MenuItem(menu, SWT.PUSH);
   item.setText("Popup");
   
   c1.setMenu(menu);
   c2.setMenu(menu);
   
   shell.setMenu(menu);
   shell.setSize(300, 300);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}</source>





Creating a Popup Menu

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; public class PopupMenuCreate { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout());
   Button bn = new Button(shell, SWT.FLAT);
   bn.setText("Right Click to see the popup menu");
   
   Menu popupMenu = new Menu(bn);
   MenuItem newItem = new MenuItem(popupMenu, SWT.CASCADE);
   newItem.setText("New");
   MenuItem refreshItem = new MenuItem(popupMenu, SWT.NONE);
   refreshItem.setText("Refresh");
   MenuItem deleteItem = new MenuItem(popupMenu, SWT.NONE);
   deleteItem.setText("Delete");
   Menu newMenu = new Menu(popupMenu);
   newItem.setMenu(newMenu);
   MenuItem shortcutItem = new MenuItem(newMenu, SWT.NONE);
   shortcutItem.setText("Shortcut");
   MenuItem iconItem = new MenuItem(newMenu, SWT.NONE);
   iconItem.setText("Icon");
   bn.setMenu(popupMenu);
   
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
 }

}</source>





PopupMenu is disposed with the composite

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; public class PopupComposite { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout(2, true));
   final Composite composite1 = new Composite(shell, SWT.BORDER);
   composite1.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
   final Composite composite2 = new Composite(shell, SWT.BORDER);
   composite2.setBackground(display.getSystemColor(SWT.COLOR_BLUE));
   Menu menu = new Menu(composite1);
   MenuItem menuItem = new MenuItem(menu, SWT.PUSH);
   menuItem.setText("Popup menu");
   menuItem.addDisposeListener(new DisposeListener() {
     public void widgetDisposed(DisposeEvent e) {
       System.out.println("Menu item is disposed.");
     }
   });
   menuItem.addSelectionListener(new SelectionAdapter() {
     public void widgetSelected(SelectionEvent e) {
       System.out.println("Dispsoing ...");
       //composite2.setMenu(null);
       composite2.dispose();
     }
   });
   composite1.setMenu(menu);
   composite2.setMenu(menu);
   shell.pack();
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       // If no more entries in event queue
       display.sleep();
     }
   }
   display.dispose();
 }

}</source>





PopupMenu is not disposed with the composite

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; public class PopupMenuComposite { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout(2, true));
   final Composite composite1 = new Composite(shell, SWT.BORDER);
   composite1.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
   final Composite composite2 = new Composite(shell, SWT.BORDER);
   composite2.setBackground(display.getSystemColor(SWT.COLOR_BLUE));
   Menu menu = new Menu(composite1);
   MenuItem menuItem = new MenuItem(menu, SWT.PUSH);
   menuItem.setText("Popup menu");
   menuItem.addDisposeListener(new DisposeListener() {
     public void widgetDisposed(DisposeEvent e) {
       System.out.println("Menu item is disposed.");
     }
   });
   menuItem.addSelectionListener(new SelectionAdapter() {
     public void widgetSelected(SelectionEvent e) {
       System.out.println("Dispsoing ...");
       composite2.setMenu(null);
       composite2.dispose();
     }
   });
   composite1.setMenu(menu);
   composite2.setMenu(menu);
   shell.pack();
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       // If no more entries in event queue
       display.sleep();
     }
   }
   display.dispose();
 }

}</source>





Popup Radio MenuItem

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; public class MenuItemPopupRadio { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   Menu menu = new Menu(shell, SWT.POP_UP);
   for (int i = 0; i < 4; i++) {
     MenuItem item = new MenuItem(menu, SWT.RADIO);
     item.setText("Item " + i);
     item.addSelectionListener(new SelectionAdapter() {
       public void widgetSelected(SelectionEvent e) {
         MenuItem item = (MenuItem) e.widget;
         if (item.getSelection()) {
           System.out.println(item + " selected");
         } else {
           System.out.println(item + " unselected");
         }
       }
     });
   }
   shell.setMenu(menu);
   shell.setSize(300, 300);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}</source>





Show a popup menu (wait for it to close)

   <source lang="java">

/******************************************************************************* 

* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
*     IBM Corporation - initial API and implementation
*******************************************************************************/

/* 

* Menu example snippet: show a popup menu (wait for it to close)
* 
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
* 
* @since 3.0
*/

import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; public class PopupMenuShow { 

 public static void main(String[] args) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   shell.addListener(SWT.MenuDetect, new Listener() {
     public void handleEvent(Event event) {
       Menu menu = new Menu(shell, SWT.POP_UP);
       MenuItem item = new MenuItem(menu, SWT.PUSH);
       item.setText("Menu Item");
       item.addListener(SWT.Selection, new Listener() {
         public void handleEvent(Event e) {
           System.out.println("Item Selected");
         }
       });
       menu.setLocation(event.x, event.y);
       menu.setVisible(true);
       while (!menu.isDisposed() && menu.isVisible()) {
         if (!display.readAndDispatch())
           display.sleep();
       }
       menu.dispose();
     }
   });
   shell.pack();
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}</source>


Источник — «http://jexp.ru/index.php?title=Java_Tutorial/SWT/PopupMenu&oldid=3180»