LCD倒计时——笔记

from PySide import QtGui,QtCore

ORIGINAL_TIME = 0
class MainWindow(QtGui.QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()

        self.time = ORIGINAL_TIME
        self.timer = None
        self.isPause = False

        self.creatMenuBar()
        self.creatToolBar()
        self.creatActions()
        self.creatCountDown()
        self.resize(300,400)

    def creatMenuBar(self):
        menuBar = self.menuBar()
        self.fileMenu = menuBar.addMenu(‘File‘)
        self.setMenuBar(menuBar)

    def creatToolBar(self):
        pass

    def creatActions(self):
        self.setCountDown = QtGui.QAction(‘Set CountDown‘,self,triggered = self.changeCountDown)
        self.changeBackGround = QtGui.QAction(‘Change BackGround‘,self,triggered = self.setBackGround)
        self.startTesting = QtGui.QAction(‘Start Testing‘,self,triggered = self.startTestSet)
        self.closeTesting = QtGui.QAction(‘Stop Testing‘,self,triggered = self.stopTest)
        self.pauseTesting = QtGui.QAction(‘Pause Testing‘,self,triggered = self.pauseTest)
        self.fileMenu.addAction(self.setCountDown)
        self.fileMenu.addAction(self.changeBackGround)
        self.fileMenu.addAction(self.startTesting)
        self.fileMenu.addAction(self.pauseTesting)
        self.fileMenu.addAction(self.closeTesting)


    def changeCountDown(self):　　　　　　　　#创建倒计时控件
         if self.timer is None:
            self.time,ok = QtGui.QInputDialog.getInteger(self,
                "Set CountDown", "Percentage:", 45, 0, 120, 1)　　　　#获取输入的对话框，这里的45，是在对话框中的已设值
            if ok :
                if self.time <= 0 or self.time > 100:
                    QtGui.QMessageBox.warning(self,"Warning Message",‘\nPlease enter a integer i like :0 < i <= 100‘)
                    self.changeCountDown()　　　　　　　　　　　　#这边有个递归的感觉，如果输入的值不符合要求，则出现提示对话框后，再次出现输入的对话框
                else:
                    self.updateTime()　　　　#设置完初始值后，更新界面上的显示时间
         else:
             QtGui.QMessageBox.warning(self,"Warning Message","\n Please stop the Testing first before you reset the CountDown")
　　　　　　　　　　　　#如果在倒计时的过程中需要重设初始值，则提示“请在重设倒计时前，先停止考试”


    def updateTime(self):
        zero = ‘‘
        zeroDouble = ‘:00‘
        if self.time < 10:
            zero = ‘0‘
        if self.time == 100:
            zeroDouble = ‘:0‘
        self.countDown.display(zero + str(self.time)+zeroDouble)



    def setBackGround(self):
        pass

    def startTestSet(self):　　　　　　#这是一个开始到倒计时的模块
        if self.timer:
        　　self.timer.stop()
            zero = ‘‘
            zeroDouble = ‘:00‘
            if self.time < 10:
            　　zero = ‘0‘
            if self.time == 100:
            　　zeroDouble = ‘:0‘
            self.countDown.display(zero+ str(self.time) +zeroDouble)
        if self.getNumber():
            self.timer = QtCore.QTimer(self)
            self.timer.timeout.connect(self.timeReset)  #每个一秒钟，改变显示的剩余时间
            self.timer.start(1000)

    def getNumber(self):
        self.minNumber = self.time
        self.secondNumber = 0
        if self.minNumber == 0:
            QtGui.QMessageBox.warning(self,"Warning Message",                                      "\nPlease set CountDown first!")
            return False
        return True


    def timeReset(self):
        self.zeroMin = ‘‘
        self.zeroSecond = ‘‘
        if self.secondNumber == 0:
            self.secondNumber = 59
            if self.minNumber == 0:   #当分钟位和秒钟位同时为0时，表明时间已到，则停止考试，显示提示对话框
                self.stopTest()
                QtGui.QMessageBox.warning(self,"Warning Message",                                          "\n        GAME OVER!\nPlease wait for your record.\t")
                return
            else:
                self.minNumber -= 1
        else:
            self.secondNumber -= 1
        if self.minNumber < 10:
            self.zeroMin = ‘0‘
        if self.secondNumber < 10:
            self.zeroSecond = ‘0‘
        self.countDown.display(self.zeroMin + str(self.minNumber) + ‘:‘ +self.zeroSecond +str(self.secondNumber))

    def stopTest(self):
        try:
            self.timer.stop()
        except:
            pass
        self.countDown.display(‘0‘+str(ORIGINAL_TIME) + ":00")
        self.timer = None
        self.time = 0

    def pauseTest(self):    #这个一个暂停计时的模块
        if self.timer :
            if self.isPause:        #由于第一次按下暂停键为暂停，第二按下暂停键为继续，故需要一个flag：self.isPause，来随时改变状态
                self.isPause = False
            else:
                self.isPause = True
            if self.isPause:
                self.timer.stop()
                self.countDown.display(self.zeroMin + str(self.minNumber) + ‘:‘ +self.zeroSecond +str(self.secondNumber))
            else:
                self.timer = QtCore.QTimer(self)
                self.timer.timeout.connect(self.timeReset)
                self.timer.start(1000)
        else:
            return

    def creatCountDown(self):
        self.countDown = QtGui.QLCDNumber()
        self.countDown.display(‘0‘+str(self.time)+":00")
        self.edit = QtGui.QTextEdit()
        self.label = QtGui.QLabel(‘Count Down‘)
        #self.label.
        self.splitter = QtGui.QSplitter(QtCore.Qt.Vertical)
        splitterH = QtGui.QSplitter()
        splitterH.addWidget(self.label)
        splitterH.addWidget(self.countDown)
        self.splitter.addWidget(splitterH)
        self.splitter.addWidget(self.edit)
        self.setCentralWidget(self.splitter)





if __name__ == ‘__main__‘:
    import sys
    app = QtGui.QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())