python+PyQT实现系统桌面时钟

__ class__ = type 
#!coding= utf-8 
#http://blog.csdn.net/gatieme/article/details/17659259 
#gatieme 
 
 
import sys 
from PyQt4.QtCore import * 
from PyQt4.QtGui import * 
 
 
#-------------------------------------------------------------------------------- 
class SystemTrayIcon(QSystemTrayIcon): 
  \"\"\" 
  The systemTrayIcon which uesd to connect the clock 
  \"\"\" 
  #---------------------------------------------------------------------------- 
  def __init__(self, mainWindow, parent = None): 
    \"\"\" 
    mainWindow : the main window that the system tray icon serves to 
    \"\"\"   
    super(SystemTrayIcon, self).__init__(parent) 
    self.window = mainWindow 
    self.setIcon(QIcon(\"heart.svg\"))  # set the icon of the systemTrayIcon 
     
    self.createActions( ) 
    self.createTrayMenu( ) 
     
    self.connect(self, SIGNAL(\"doubleClicked\"), self.window, SLOT(\"showNormal\")) 
    #self.connect(self, SIGNAL(\"activated( )\"), self, SLOT(\"slot_ic d\")) 
     
 
  def createActions(self): 
    \"\"\" 
    create some action to Max Min Normal show the window 
    \"\"\" 
    self.minimizeAction = QAction(\"Mi&nimize\", self.window, triggered = self.window.hide) 
    self.maximizeAction = QAction(\"Ma&ximize\", self.window, triggered = self.window.showMaximized) 
    self.restoreAction = QAction(\"&Restore\", self.window, triggered = self.window.showNormal) 
    self.quitAction = QAction(\"&Quit\", self.window, triggered = qApp.quit) 
         
 
  def createTrayMenu(self): 
     self.trayIconMenu = QMenu(self.window) 
     self.trayIconMenu.addAction(self.minimizeAction) 
     self.trayIconMenu.addAction(self.maximizeAction) 
     self.trayIconMenu.addAction(self.restoreAction) 
     self.trayIconMenu.addSeparator( ) 
     self.trayIconMenu.addAction(self.quitAction) 
 
     self.setContextMenu(self.trayIconMenu) 
   
  def setVisible(self, visible): 
    self.minimizeAction.setEnabled(not visible) 
    self.maximizeAction.setEnabled(not self.window.isMaximized()) 
    self.restoreAction.setEnabled(self.window.isMaximized() or not visible) 
    super(Window, self).setVisible(visible) 
 
 
 
  def closeEvent(self, event): 
    #if event.button( ) == Qt.RightButton: 
    self.showMessage(\"Message\", 
        \"The program will keep running in the system tray. To \" 
        \"terminate the program, choose <b>Quit</b> in the \" 
        \"context menu of the system tray entry.\",  
        QSystemTrayIcon.Information, 5000) 
    self.window.hide( ) 
    event.ignore( ) 
 
  def slot_ic d(self, reason): 
    if reason == QSystemTrayIcon.DoubleClick: 
      self.wiondow.showNormal( ) 
 
 
 
#-------------------------------------------------------------------------------- 
class DigitClock(QLCDNumber): 
  \"\"\" 
  the DigitClock show a digit clock int the printer 
  \"\"\" 
   
  #---------------------------------------------------------------------------- 
  def __init__(self, parent = None): 
    \"\"\" 
    the constructor function of the DigitClock 
    \"\"\" 
    super(DigitClock, self).__init__(parent) 
    pale = self.palette( ) 
 
    pale.setColor(QPalette.Window, QColor(100, 180, 100)) 
    self.setPalette(pale) 
     
    self.setNumDigits(19) 
    self.systemTrayIcon = SystemTrayIcon(mainWindow = self) 
 
     
    self.dragPosition = None; 
    self.setWindowFlags(Qt. lessWindowHint | Qt.WindowStaysOnTopHint | Qt.Popup | Qt.Tool) 
    self.setWindowOpacity(1) 
     
    self.showTime( )      # print the time when the clock show 
    self.systemTrayIcon.show( ) # show the SystemTaryIcon when the clock show  
 
    self.timer = QTimer( ) 
    self.connect(self.timer, SIGNAL(\"timeout( )\"), self.showTime) 
    self.timer.start(1000) 
     
    self.resize(500, 60) 
     
   
  #---------------------------------------------------------------------------- 
  def showTime(self): 
    \"\"\" 
    show the current time 
    \"\"\" 
    self.date = QDate.currentDate( ) 
    self.time = QTime.currentTime( ) 
    text = self.date.toString(\"yyyy-MM-dd\") + \" \" + self.time.toString(\"hh:mm:ss\") 
    self.display(text) 
 
     
 
  #---------------------------------------------------------------------------- 
  def mousePressEvent(self, event): 
    \"\"\" 
    clicked the left mouse to move the clock 
    clicked the right mouse to hide the clock 
    \"\"\" 
    if event.button( ) == Qt.LeftButton: 
      self.dragPosition = event.globalPos( ) - self. Geometry( ).topLeft( ) 
      event.accept( ) 
    elif event.button( ) == Qt.RightButton: 
      self.systemTrayIcon.closeEvent(event) 
 
      #self.systemTrayIcon.hide( ) 
      #self.close( ) 
 
  def mouseMoveEvent(self, event): 
    \"\"\" 
    \"\"\" 
    if event.buttons( ) & Qt.LeftButton: 
      self.move(event.globalPos( ) - self.dragPosition) 
      event.accept( ) 
   
  def keyPressEvent(self, event): 
    \"\"\" 
    you can enter \"ESC\" to normal show the window, when the clock is Maxmize 
    \"\"\" 
    if event.key() == Qt.Key_Escape and self.isMaximized( ): 
      self.showNormal( ) 
 
  def mouseDoubleClickEvent(self, event): 
    \"\"\" 
    \"\"\" 
    if event.buttons() == Qt.LeftButton: 
      if self.isMaximized( ): 
        self.showNormal( ) 
      else: 
        self.showMaximized( ) 
   
if __name__ == \"__main__\": 
  app = QApplication(sys.argv) 
   
  digitClock = DigitClock( ) 
  digitClock.show( )   
   
  sys.exit(app.exec_( ))