swt tray demo:右键菜单,单击隐藏,所有事件的例子

答案：
swt的system tray,只能处理三种事件:左键单击,左键双击和右键双击,右键单击这是我看swt 3.0.1 win32的源码所知此demo有以下功能:1.左键单击时 ,隐藏,显示主窗口2.右键单击,弹出菜单注意:1.左键双击和右键双击是一种事件,无法区分2.左键双击将产生以下事件:左键单击,左键双击,左键单击3.关于弹出菜单,menu必须有一个parent,如果程序里没有任何shell,可以建一个不可见的shell专门作为menu的parent.

import org.eclipse.swt.*;import org.eclipse.swt.widgets.*;import org.eclipse.swt.events.*;import org.eclipse.swt.layout.FillLayout;import org.eclipse.swt.graphics.Image;class HelloTray implements SelectionListener{Display display;Shell shell;Button hello;Tray tray;TrayItem ti;Menu menu;MenuItem mi1;MenuItem mi2;MenuItem quit;public HelloTray(){display = Display.getDefault();shell = new Shell();FillLayout fillLayout = new FillLayout();fillLayout.type = SWT.VERTICAL;shell.setLayout(fillLayout);hello = new Button(shell, SWT.NONE);hello.setText("Hello World!");   hello.addSelectionListener(new SelectionAdapter(){public void widgetSelected(SelectionEvent e){       if(hello.getText().equals("Hello World!"))         hello.setText("Clicked");       else         hello.setText("Hello World!");}});menu=new Menu(shell);mi1=new MenuItem(menu,SWT.PUSH);mi1.setText("MenuItem 1");mi1.addSelectionListener(this);mi2=new MenuItem(menu,SWT.PUSH);mi2.setText("MenuItem 2");mi2.addSelectionListener(this);quit=new MenuItem(menu,SWT.PUSH);quit.setText("Quit");quit.addSelectionListener(this);//生成swt的traytray=display.getSystemTray();ti=new TrayItem(tray,0);ti.setToolTipText("This is a swt Tray!");ti.setImage(new Image(display,"E:\\My Documents\\My Pictures\\alm.gif"));//swt,tray的所有事件:ti.addSelectionListener(new SelectionListener(){//左键单击public void widgetSelected(SelectionEvent e){System.out.println("Tray Selcted");//左键单击时 ,隐藏,显示主窗口if(shell.isVisible()){shell.setVisible(false);}else{shell.setVisible(true);shell.forceActive();}}//左键双击,右键双击,都是它public void widgetDefaultSelected(SelectionEvent e){System.out.println("Tray widgetDefaultSelected");}});//右键单击,弹出菜单ti.addListener(SWT.MenuDetect,new Listener(){public void handleEvent(Event event){System.out.println("SWT.MenuDetect");menu.setLocation(display.getCursorLocation());       menu.setVisible(true);}});}public void start(){shell.open();while (!shell.isDisposed()) {if (!display.readAndDispatch())display.sleep();}display.dispose();}public static void main(String[] args) {HelloTray app=new HelloTray();app.start(); }public void widgetSelected(SelectionEvent e){System.out.println(e.getSource()+" selected.");if(e.getSource()==quit){System.out.println("Quit");display.dispose();System.exit(0);}}public void widgetDefaultSelected(SelectionEvent e){ }} 

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