SWT Menu, ToolBar, CoolBar的实现

本文主要是实现了Menu（菜单）、ToolBar（工具条）、CoolBar，这些在平时做界面中都是很常用的，相比以前的简单控件，这些控件的使用更加灵活以及困难。

Menu的实现了其中很多常用的类型，比如单选、复选菜单以及右键菜单，ToolBar实现了单选、复选以及下拉方式，而CoolBar作为一种灵活的控件，你可以在上面放置控件，并且能够实现任意的拖拽。

实现代码：

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MenuEvent;
import org.eclipse.swt.events.MenuListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.CoolBar;
import org.eclipse.swt.widgets.CoolItem;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;

/**
 * @author XiangJie
 * 
 */
public class Test_MenuAndToolBar {

	public void test_MenuAndToolBar(Composite parent) {
		show_ControlMenu(parent);
		show_ToolBar(parent);
		showCoolBar(parent);
	}

	private void showCoolBar(Composite parent) {
		Composite tempCom = new Composite(parent, SWT.BORDER);
		tempCom.setLayout(new FillLayout());

		CoolBar coolBar = new CoolBar(tempCom, SWT.BORDER);
		// coolBar.setLayout(new FillLayout());

		CoolItem item1 = new CoolItem(coolBar, SWT.NONE);

		Combo combo = new Combo(coolBar, SWT.NONE | SWT.READ_ONLY);
		combo.setItems(new String[] { "test1", "test2" });

		Point p = combo.computeSize(SWT.DEFAULT, SWT.DEFAULT);
		combo.setSize(p);
		Point p2 = item1.computeSize(p.x, p.y);
		item1.setSize(p2);
		item1.setControl(combo);

		CoolItem item2 = new CoolItem(coolBar, SWT.NONE);

		Button testButton = new Button(coolBar, SWT.NONE);
		testButton.setText("Test!");

		p = testButton.computeSize(SWT.DEFAULT, SWT.DEFAULT);
		combo.setSize(p);
		p2 = item2.computeSize(p.x, p.y);
		item2.setSize(p2);
		item2.setControl(testButton);

	}

	private void show_ToolBar(Composite parent) {

		Composite tempCom = new Composite(parent, SWT.BORDER);
		tempCom.setLayout(new FillLayout());

		final ToolBar toolBar = new ToolBar(tempCom, SWT.WRAP);
		ToolItem pItem = new ToolItem(toolBar, SWT.PUSH);
		pItem.setText("Push me!");

		new ToolItem(toolBar, SWT.SEPARATOR);

		ToolItem cItem1 = new ToolItem(toolBar, SWT.CHECK);
		cItem1.setText("Check me1!");

		ToolItem cItem2 = new ToolItem(toolBar, SWT.CHECK);
		cItem2.setText("Check me2!");

		new ToolItem(toolBar, SWT.SEPARATOR);

		ToolItem rItem1 = new ToolItem(toolBar, SWT.RADIO);
		rItem1.setText("Radio me1!");

		ToolItem rItem2 = new ToolItem(toolBar, SWT.RADIO);
		rItem2.setText("Radio me2!");

		final ToolItem droItem = new ToolItem(toolBar, SWT.DROP_DOWN);
		droItem.setText("Drop down me");

		final Menu testMenu = new Menu(tempCom.getShell(), SWT.POP_UP);
		(new MenuItem(testMenu, SWT.NONE)).setText("Just to Test!");

		droItem.addSelectionListener(new SelectionListener() {

			@Override
			public void widgetSelected(SelectionEvent e) {
				// TODO Auto-generated method stub
				boolean flat = testMenu.getVisible();

				if (!flat) {
					showMenu();
				} else {
					testMenu.setVisible(false);
				}
			}

			private void showMenu() {
				Rectangle rct = droItem.getBounds();

				Point point = toolBar.toDisplay(rct.x, rct.y + rct.height);

				testMenu.setLocation(point);

				testMenu.setVisible(true);

			}

			@Override
			public void widgetDefaultSelected(SelectionEvent e) {
				// TODO Auto-generated method stub

			}
		});

	}

	private void show_ControlMenu(Composite parent) {
		Composite tempCom = new Composite(parent, SWT.BORDER);
		tempCom.setLayout(new FillLayout());

		final Label testLabel = new Label(tempCom, SWT.BORDER | SWT.WRAP);
		testLabel.setText("Please use right click!");

		testLabel.setBackground(new Color(null, 255, 0, 0));

		final Menu menu = new Menu(testLabel);
		testLabel.setMenu(menu);

		MenuItem item1 = new MenuItem(menu, SWT.NONE);
		item1.setText("test!");

		menu.addMenuListener(new MenuListener() {

			@Override
			public void menuShown(MenuEvent e) {
				// TODO Auto-generated method stub
				// boolean flat = menu.getVisible();
				testLabel.setText("Menu is visiable!");
				menu.setVisible(true);
			}

			@Override
			public void menuHidden(MenuEvent e) {
				// TODO Auto-generated method stub
				testLabel.setText("Menu is hidden!");
				menu.setVisible(false);
			}
		});
	}

	public void shellMenuTest(Shell shell) {
		Menu menu = new Menu(shell, SWT.BAR | SWT.DROP_DOWN);

		MenuItem item1 = new MenuItem(menu, SWT.CASCADE);
		item1.setText("&Open");

		Menu suMenu = new Menu(shell, SWT.DROP_DOWN);// new Menu(item1);
		item1.setMenu(suMenu);

		MenuItem item2 = new MenuItem(suMenu, SWT.RADIO);
		item2.setText("&Save");

		MenuItem item3 = new MenuItem(suMenu, SWT.RADIO);
		item3.setText("&Test");

		new MenuItem(suMenu, SWT.SEPARATOR);

		MenuItem item4 = new MenuItem(suMenu, SWT.CHECK);
		item4.setText("&Check");

		MenuItem item5 = new MenuItem(suMenu, SWT.CHECK);
		item5.setText("&SCheck");

		new MenuItem(suMenu, SWT.SEPARATOR);

		MenuItem item6 = new MenuItem(suMenu, SWT.CASCADE);
		item6.setText("&Menu");

		Menu suMenu2 = new Menu(shell, SWT.DROP_DOWN);// new Menu(item1);
		item6.setMenu(suMenu2);

		MenuItem item7 = new MenuItem(suMenu2, SWT.CASCADE);
		item7.setText("&First");

		shell.setMenuBar(menu);
	}

	/**
	 * create data: 2010-1-14</br>
	 * 
	 * @author XiangJie
	 * @param args
	 * 
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setText("SWT Menu and ToolBar:");
		shell.setLayout(new FillLayout(SWT.VERTICAL));

		Test_MenuAndToolBar test = new Test_MenuAndToolBar();
		test.shellMenuTest(shell);
		test.test_MenuAndToolBar(shell);

		shell.pack();
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}

效果演示：

本文系eclipselight.org（日食之光）原创文章，转载请注明出处。

固定链接：http://www.eclipselight.org/swt-jface/616/