Java Tutorial/SWT/MenuItem

Материал из Java эксперт
Перейти к: навигация, поиск

Add Image to MenuItem

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridLayout; 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 MenuItemWithImage { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout());
   Menu menuBar = new Menu(shell, SWT.BAR);
   Menu fileMenu = new Menu(menuBar);
   MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE | SWT.NO_RADIO_GROUP);
   fileItem.setText("File");
   fileItem.setMenu(fileMenu);
   Image yourImage = new Image(shell.getDisplay(), "yourFile.gif");
   MenuItem itema = new MenuItem(fileMenu, SWT.NONE);
   itema.setText("Radio A");
   itema.setImage(yourImage);
   MenuItem itemb = new MenuItem(fileMenu, SWT.NONE);
   itemb.setText("Radio B");
   MenuItem itemc = new MenuItem(fileMenu, SWT.NONE);
   itemc.setText("Radio C");
   shell.setMenuBar(menuBar);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
 }

}</source>





CheckBox Menu

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; 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 CheckBoxMenuCreate { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout());
   // Create the bar menu
   Menu menuBar = new Menu(shell, SWT.BAR);
   // Create the File item"s dropdown menu
   Menu fileMenu = new Menu(menuBar);
   // Create all the items in the bar menu
   MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE);
   fileItem.setText("File");
   fileItem.setMenu(fileMenu);
   // Create the second radio group
   MenuItem itema = new MenuItem(fileMenu, SWT.CHECK);
   itema.setText(" A");
   MenuItem itemb = new MenuItem(fileMenu, SWT.CHECK);
   itemb.setText(" B");
   MenuItem itemc = new MenuItem(fileMenu, SWT.CHECK);
   itemc.setText(" C");
   shell.setMenuBar(menuBar);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
 }

}</source>





Create a radio menu item and deselects it

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; 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 RadioMenuItemDeselected { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout());
   Menu menuBar = new Menu(shell, SWT.BAR);
   Menu fileMenu = new Menu(menuBar);
   MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE | SWT.NO_RADIO_GROUP);
   fileItem.setText("File");
   fileItem.setMenu(fileMenu);
   MenuItem itema = new MenuItem(fileMenu, SWT.RADIO);
   itema.setText("Radio A");
   itema.setSelection(true);
   
   MenuItem itemb = new MenuItem(fileMenu, SWT.RADIO);
   itemb.setText("Radio B");
   MenuItem itemc = new MenuItem(fileMenu, SWT.RADIO);
   itemc.setText("Radio C");
   shell.setMenuBar(menuBar);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
 }

}</source>





Create menu items as part of a radio group using the SWT.RADIO style

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; 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 RadioNoGroup { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout());
   Menu menuBar = new Menu(shell, SWT.BAR);
   Menu fileMenu = new Menu(menuBar);
   MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE);
   fileItem.setText("File");
   fileItem.setMenu(fileMenu);
   MenuItem itema = new MenuItem(fileMenu, SWT.RADIO);
   itema.setText("Radio A");
   MenuItem itemb = new MenuItem(fileMenu, SWT.RADIO);
   itemb.setText("Radio B");
   MenuItem itemc = new MenuItem(fileMenu, SWT.RADIO);
   itemc.setText("Radio C");
   shell.setMenuBar(menuBar);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
 }

}</source>





Disable MenuItem

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; 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 MenuItemDiabled { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout());
   Menu menuBar = new Menu(shell, SWT.BAR);
   Menu fileMenu = new Menu(menuBar);
   MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE | SWT.NO_RADIO_GROUP);
   fileItem.setText("File");
   fileItem.setMenu(fileMenu);
   MenuItem itema = new MenuItem(fileMenu, SWT.NONE);
   itema.setText("Radio A");
   itema.setEnabled(false);
   MenuItem itemb = new MenuItem(fileMenu, SWT.NONE);
   itemb.setText("Radio B");
   MenuItem itemc = new MenuItem(fileMenu, SWT.NONE);
   itemc.setText("Radio C");
   shell.setMenuBar(menuBar);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
 }

}</source>





Set Accelerator for MenuItem

   <source lang="java">

import org.eclipse.swt.SWT; 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 MenuItemAcceletorSetting { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   Menu bar = new Menu(shell, SWT.BAR);
   shell.setMenuBar(bar);
   MenuItem fileItem = new MenuItem(bar, SWT.CASCADE);
   fileItem.setText("&File");
   Menu submenu = new Menu(shell, SWT.DROP_DOWN);
   fileItem.setMenu(submenu);
   MenuItem item = new MenuItem(submenu, SWT.PUSH);
   item.setText("Select &All\tCtrl+A");
   item.setAccelerator(SWT.MOD1 + "A");
   shell.setSize(200, 200);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}</source>





Set CheckBox Menu selected

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; 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 CheckBoxSelected { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   shell.setLayout(new GridLayout());
   Menu menuBar = new Menu(shell, SWT.BAR);
   Menu fileMenu = new Menu(menuBar);
   MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE | SWT.NO_RADIO_GROUP);
   fileItem.setText("File");
   fileItem.setMenu(fileMenu);
   MenuItem itema = new MenuItem(fileMenu, SWT.CHECK);
   itema.setText("Radio A");
   itema.setSelection(true);
   
   MenuItem itemb = new MenuItem(fileMenu, SWT.NONE);
   itemb.setText("Radio B");
   MenuItem itemc = new MenuItem(fileMenu, SWT.NONE);
   itemc.setText("Radio C");
   shell.setMenuBar(menuBar);
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
 }

}</source>





Update a status line when an item is armed

   <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
*******************************************************************************/

/* 

* Control example snippet: update a status line when an item is armed
*
* 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.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.layout.FormLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; 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 StatusLineUpdateWhenMenuItemArmed { 

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   
   FormLayout layout = new FormLayout();
   shell.setLayout(layout);
   
   final Label label = new Label(shell, SWT.BORDER);
   Listener armListener = new Listener() {
     public void handleEvent(Event event) {
       MenuItem item = (MenuItem) event.widget;
       label.setText(item.getText());
       label.update();
     }
   };
   Listener showListener = new Listener() {
     public void handleEvent(Event event) {
       Menu menu = (Menu) event.widget;
       MenuItem item = menu.getParentItem();
       if (item != null) {
         label.setText(item.getText());
         label.update();
       }
     }
   };
   Listener hideListener = new Listener() {
     public void handleEvent(Event event) {
       label.setText("");
       label.update();
     }
   };
   FormData labelData = new FormData();
   labelData.left = new FormAttachment(0);
   labelData.right = new FormAttachment(100);
   labelData.bottom = new FormAttachment(100);
   label.setLayoutData(labelData);
   Menu menuBar = new Menu(shell, SWT.BAR);
   shell.setMenuBar(menuBar);
   MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE);
   fileItem.setText("File");
   fileItem.addListener(SWT.Arm, armListener);
   MenuItem editItem = new MenuItem(menuBar, SWT.CASCADE);
   editItem.setText("Edit");
   editItem.addListener(SWT.Arm, armListener);
   Menu fileMenu = new Menu(shell, SWT.DROP_DOWN);
   fileMenu.addListener(SWT.Hide, hideListener);
   fileMenu.addListener(SWT.Show, showListener);
   fileItem.setMenu(fileMenu);
   String[] fileStrings = { "New", "Close", "Exit" };
   for (int i = 0; i < fileStrings.length; i++) {
     MenuItem item = new MenuItem(fileMenu, SWT.PUSH);
     item.setText(fileStrings[i]);
     item.addListener(SWT.Arm, armListener);
   }
   Menu editMenu = new Menu(shell, SWT.DROP_DOWN);
   editMenu.addListener(SWT.Hide, hideListener);
   editMenu.addListener(SWT.Show, showListener);
   String[] editStrings = { "Cut", "Copy", "Paste" };
   editItem.setMenu(editMenu);
   for (int i = 0; i < editStrings.length; i++) {
     MenuItem item = new MenuItem(editMenu, SWT.PUSH);
     item.setText(editStrings[i]);
     item.addListener(SWT.Arm, armListener);
   }
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}</source>


Источник — «http://jexp.ru/index.php?title=Java_Tutorial/SWT/MenuItem&oldid=3136»