Eclispe的SWT和JFace功能非常強大,可以開發出相當漂亮的GUI應用程序。
本文用SWT實現了Windows任務欄的系統托盤功能。添加了托盤右擊菜單,當窗口最小化時隱藏窗口在任務欄的顯示。
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.events.ShellListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.internal.win32.OS;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tray;
import org.eclipse.swt.widgets.TrayItem;
public class SystemTray extends Shell {
/**
* Launch the application
*
* @param args
*/
public static void main(String args[]) {
try {
Display display = Display.getDefault();
SystemTray shell = new SystemTray(display, SWT.SHELL_TRIM);
shell.createSystemTray(shell);
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Create the shell
*
* @param display
* @param style
*/
public SystemTray(Display display, int style) {
super(display, style);
createContents();
}
/**
* Create contents of the window
*/
protected void createContents() {
setText("SWT Application");
setSize(500, 375);
}
protected void checkSubclass() {
// Disable the check that prevents subclassing of SWT components
}
public void createSystemTray(final Shell shell) {
// 下面兩句的效果是:在任務欄不顯示
final int hWnd = shell.handle;
OS.SetWindowLong(hWnd, OS.GWL_EXSTYLE, OS.WS_EX_CAPTIONOKBTN);
shell.addShellListener(new ShellListener() {
public void shellDeactivated(org.eclipse.swt.events.ShellEvent e) {
System.out.println("shellDeactivated");
}
public void shellActivated(org.eclipse.swt.events.ShellEvent e) {
System.out.println("shellActivated");
}
public void shellClosed(org.eclipse.swt.events.ShellEvent e) {
System.out.println("shellClosed");
}
/**
* Sent when a shell is un-minimized.
*/
public void shellDeiconified(org.eclipse.swt.events.ShellEvent e) {
System.out.println("shellDeiconified");
}
/**
* Sent when a shell is minimized. Shell 最小化後事件
*/
public void shellIconified(org.eclipse.swt.events.ShellEvent e) {
// 最小化時不顯示在任務欄
shell.setVisible(false);
System.out.println("shell.setVisible(false);");
}
});
Display display = shell.getDisplay();
// Image image = new Image (display, 16, 16);
Image image = new Image(display, "images/toc_closed.gif");
final Tray tray = display.getSystemTray();
final TrayItem trayItem = new TrayItem(tray, SWT.NONE);
trayItem.setToolTipText("SWT TrayItem");
trayItem.addListener(SWT.Show, new Listener() {
public void handleEvent(Event event) {
System.out.println("show");
}
});
trayItem.addListener(SWT.Hide, new Listener() {
public void handleEvent(Event event) {
System.out.println("hide");
}
});
// 托盤單擊事件
trayItem.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
System.out.println("selection");
// shell.setVisible(true);
// shell.setMinimized(false);
}
});
// 托盤雙擊事件
trayItem.addListener(SWT.DefaultSelection, new Listener() {
public void handleEvent(Event event) {
System.out.println("default selection");
shell.setVisible(true);
shell.setMinimized(false);
}
});
// 添加托盤右鍵菜單
final Menu menu = new Menu(shell, SWT.POP_UP);
MenuItem menuItemMaximize = new MenuItem(menu, SWT.PUSH);// 最大化菜單
menuItemMaximize.setText("Maximize");
menuItemMaximize.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
shell.setVisible(true);
shell.setMaximized(true);
}
public void widgetDefaultSelected(SelectionEvent e) {
// widgetSelected(e);
}
});
MenuItem menuItemMinimize = new MenuItem(menu, SWT.PUSH);// 最小化菜單
menuItemMinimize.setText("Minimize");
menuItemMinimize.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
shell.setMinimized(true);
}
public void widgetDefaultSelected(SelectionEvent e) {
// widgetSelected(e);
}
});
new MenuItem(menu, SWT.SEPARATOR);// 分割條
MenuItem menuItemClose = new MenuItem(menu, SWT.PUSH);// 關閉菜單
menuItemClose.setText("Close");
menuItemClose.addSelectionListener(new SelectionListener() {
public void widgetDefaultSelected(SelectionEvent e) {
Display.getCurrent().close();
}
public void widgetSelected(SelectionEvent e) {
widgetDefaultSelected(e);
}
});
trayItem.addListener(SWT.MenuDetect, new Listener() {
public void handleEvent(Event event) {
System.out.println("shell.isVisible():" + shell.isVisible());
menu.setVisible(true);
if (shell.isVisible()) {
menu.getItem(0).setEnabled(true);
menu.getItem(1).setEnabled(true);
} else {
menu.getItem(0).setEnabled(true);
menu.getItem(1).setEnabled(false);
}
}
});
trayItem.setImage(image);
}
}
歡迎轉載!:) 轉載請註明出處: http://blog.csdn.net/techyang
(完)
用SWT實現系統托盤(改進版)
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