menus.java

自己建立的项目

package com.swtSample.widgets;

import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

/**
 * This class demonstrates menus
 */
public class Menus {
	private Image star;

	private Image circle;

	private Image square;

	private Image triangle;

	/**
	 * Runs the application
	 */
	public void run() {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setText("Menus");
		createContents(shell);
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
		if (circle != null)
			circle.dispose();
		if (star != null)
			star.dispose();
		if (square != null)
			square.dispose();
		if (triangle != null)
			triangle.dispose();
		display.dispose();
	}

	/**
	 * Creates the main window's contents
	 * 
	 * @param shell
	 *            the main window
	 */
	private void createContents(Shell shell) {
		shell.setLayout(new FillLayout());
		createBarMenu(shell);
		createPopUpMenu(shell);
		createNoRadioGroupPopUpMenu(shell);
	}

	/**
	 * Creates the bar menu for the main window
	 * 
	 * @param shell
	 *            the main window
	 */
	private void createBarMenu(Shell shell) {
		// Create the bar menu
		Menu menu = new Menu(shell, SWT.BAR);

		// Create all the items in the bar menu
		MenuItem fileItem = new MenuItem(menu, SWT.CASCADE);
		fileItem.setText("File");
		MenuItem editItem = new MenuItem(menu, SWT.CASCADE);
		editItem.setText("Edit");
		MenuItem formatItem = new MenuItem(menu, SWT.CASCADE);
		formatItem.setText("Format");
		MenuItem viewItem = new MenuItem(menu, SWT.CASCADE);
		viewItem.setText("View");
		MenuItem helpItem = new MenuItem(menu, SWT.CASCADE);
		helpItem.setText("Help");

		// Create the File item's dropdown menu
		Menu fileMenu = new Menu(menu);
		fileItem.setMenu(fileMenu);

		// Create all the items in the File dropdown menu
		MenuItem newItem = new MenuItem(fileMenu, SWT.NONE);
		newItem.setText("New");
		MenuItem openItem = new MenuItem(fileMenu, SWT.NONE);
		openItem.setText("Open...");
		MenuItem saveItem = new MenuItem(fileMenu, SWT.NONE);
		saveItem.setText("Save");
		MenuItem saveAsItem = new MenuItem(fileMenu, SWT.NONE);
		saveAsItem.setText("Save As...");
		new MenuItem(fileMenu, SWT.SEPARATOR);
		MenuItem pageSetupItem = new MenuItem(fileMenu, SWT.NONE);
		pageSetupItem.setText("Page Setup...");
		MenuItem printItem = new MenuItem(fileMenu, SWT.NONE);
		printItem.setText("Print...");
		new MenuItem(fileMenu, SWT.SEPARATOR);
		MenuItem exitItem = new MenuItem(fileMenu, SWT.NONE);
		exitItem.setText("Exit");

		// Set the bar menu as the menu in the shell
		shell.setMenuBar(menu);
	}

	/**
	 * Creates the left-half pop-up menu
	 * 
	 * @param shell
	 *            the main window
	 */
	private void createPopUpMenu(Shell shell) {
		// Create a composite that the pop-up menu will be
		// associated with
		Label label = new Label(shell, SWT.BORDER);
		label.setText("Pop-up Menu");

		// Create the pop-up menu
		Menu menu = new Menu(label);

		// Create the images
		star = new Image(shell.getDisplay(), this.getClass()
				.getResourceAsStream("/images/star.gif"));
		circle = new Image(shell.getDisplay(), this.getClass()
				.getResourceAsStream("/images/circle.gif"));
		square = new Image(shell.getDisplay(), this.getClass()
				.getResourceAsStream("/images/square.gif"));
		triangle = new Image(shell.getDisplay(), this.getClass()
				.getResourceAsStream("/images/triangle.gif"));

		// Create all the items in the pop-up menu
		MenuItem newItem = new MenuItem(menu, SWT.CASCADE);
		newItem.setText("New");
		newItem.setImage(star);
		MenuItem refreshItem = new MenuItem(menu, SWT.NONE);
		refreshItem.setText("Refresh");
		refreshItem.setImage(circle);
		MenuItem deleteItem = new MenuItem(menu, SWT.NONE);
		deleteItem.setText("Delete");

		new MenuItem(menu, SWT.SEPARATOR);

		// Add a check menu item and select it
		MenuItem checkItem = new MenuItem(menu, SWT.CHECK);
		checkItem.setText("Check");
		checkItem.setSelection(true);
		checkItem.setImage(square);

		// Add a push menu item
		MenuItem pushItem = new MenuItem(menu, SWT.PUSH);
		pushItem.setText("Push");

		new MenuItem(menu, SWT.SEPARATOR);

		// Create some radio items
		MenuItem item1 = new MenuItem(menu, SWT.RADIO);
		item1.setText("Radio One");
		item1.setImage(triangle);
		MenuItem item2 = new MenuItem(menu, SWT.RADIO);
		item2.setText("Radio Two");
		MenuItem item3 = new MenuItem(menu, SWT.RADIO);
		item3.setText("Radio Three");

		// Create a new radio group
		new MenuItem(menu, SWT.SEPARATOR);

		// Create some radio items
		MenuItem itema = new MenuItem(menu, SWT.RADIO);
		itema.setText("Radio A");
		MenuItem itemb = new MenuItem(menu, SWT.RADIO);
		itemb.setText("Radio B");
		MenuItem itemc = new MenuItem(menu, SWT.RADIO);
		itemc.setText("Radio C");

		// Create the New item's dropdown menu
		Menu newMenu = new Menu(menu);
		newItem.setMenu(newMenu);

		// Create the items in the New dropdown menu
		MenuItem shortcutItem = new MenuItem(newMenu, SWT.NONE);
		shortcutItem.setText("Shortcut");
		MenuItem iconItem = new MenuItem(newMenu, SWT.NONE);
		iconItem.setText("Icon");

		// Set the pop-up menu as the pop-up for the label
		label.setMenu(menu);
	}

	/**
	 * Creates the No Radio Group pop-up menu
	 * 
	 * @param shell
	 *            the main window
	 */
	private void createNoRadioGroupPopUpMenu(Shell shell) {
		// Create a composite that the pop-up menu will be
		// associated with
		Label label = new Label(shell, SWT.BORDER);
		label.setText("No Radio Group Menu");

		// Create the pop-up menu with the No Radio Group style
		Menu menu = new Menu(shell, SWT.POP_UP | SWT.NO_RADIO_GROUP);
		label.setMenu(menu);

		// Create all the items in the pop-up menu
		MenuItem item1 = new MenuItem(menu, SWT.RADIO);
		item1.setText("Radio One");
		MenuItem item2 = new MenuItem(menu, SWT.RADIO);
		item2.setText("Radio Two");
		MenuItem item3 = new MenuItem(menu, SWT.RADIO);
		item3.setText("Radio Three");

		// Set the pop-up menu as the pop-up for the label
		label.setMenu(menu);
	}

	/**
	 * The application entry point
	 * 
	 * @param args
	 *            the command line arguments
	 */
	public static void main(String[] args) {
		new Menus().run();
	}
}