SWT Menu, ToolBar, CoolBar的实现-优快云博客

本文介绍如何在SWT中实现菜单(Menu)、工具栏(ToolBar)和CoolBar等功能，包括不同类型的菜单项和工具按钮，以及CoolBar上的控件拖拽功能。

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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：