Posted on 2007-07-20 21:22
kooyee 閱讀(449)
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GUI骨衣
swt的system tray,只能處理三種事件:左鍵單擊,左鍵雙擊和右鍵雙擊,右鍵單擊
這是我看swt 3.0.1 win32的源碼所知
此demo有以下功能:
1.左鍵單擊時 ,隱藏,顯示主窗口
2.右鍵單擊,彈出菜單
注意:
1.左鍵雙擊和右鍵雙擊是一種事件,無法區分
2.左鍵雙擊將產生以下事件:左鍵單擊,左鍵雙擊,左鍵單擊
3.關于彈出菜單,menu必須有一個parent,如果程序里沒有任何shell,可以建一個不可見的shell專門作為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tray
tray=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(){
//左鍵單擊
public void widgetSelected(SelectionEvent e){
System.out.println("Tray Selcted");
//左鍵單擊時 ,隱藏,顯示主窗口
if(shell.isVisible()){
shell.setVisible(false);
}else{
shell.setVisible(true);
shell.forceActive();
}
}
//左鍵雙擊,右鍵雙擊,都是它
public void widgetDefaultSelected(SelectionEvent e){
System.out.println("Tray widgetDefaultSelected");
}
});
//右鍵單擊,彈出菜單
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){
}
}