[Python编程(第4版)].(Programming.Python.4th.Edition).Mark.Lutz.文字版

self.drawClockface(cfg) # onUpdate called next

###############################################################################

# Clock composite object

###############################################################################

ChecksPerSec = 10 # second change timer

class Clock(Frame):

def __init__(self, config=ClockConfig, parent=None):

Frame.__init__(self, parent)

self.cfg = config

self.makeWidgets(parent) # children are packed but

self.labelOn = 0 # clients pack or grid me

self.display = self.digitalDisplay

self.lastSec = self.lastMin = −1

self.countdownSeconds = 0

self.onSwitchMode(None)

self.onTimer()

def makeWidgets(self, parent):

self.digitalDisplay = DigitalDisplay(self, self.cfg)

self.analogDisplay = AnalogDisplay(self, self.cfg)

self.dateLabel = Label(self, bd=3, bg='red', fg='blue')

parent.bind('<ButtonPress-1>', self.onSwitchMode)

parent.bind('<ButtonPress-3>', self.onToggleLabel)

parent.bind('<Configure>', self.onResize)

parent.bind('<KeyPress-s>', self.onCountdownSec)

parent.bind('<KeyPress-m>', self.onCountdownMin)

def onSwitchMode(self, event):

self.display.pack_forget()

if self.display == self.analogDisplay:

self.display = self.digitalDisplay

else:

self.display = self.analogDisplay

self.display.pack(side=TOP, expand=YES, fill=BOTH)

def onToggleLabel(self, event):

self.labelOn += 1

if self.labelOn % 2:

self.dateLabel.pack(side=BOTTOM, fill=X)

else:

self.dateLabel.pack_forget()

self.update()

def onResize(self, event):

if event.widget == self.display:

self.display.onResize(event.width, event.height, self.cfg)

def onTimer(self):

secsSinceEpoch = time.time()

timeTuple = time.localtime(secsSinceEpoch)

hour, min, sec = timeTuple[3:6]

758 | Chapter 11: Complete GUI Programs

Do

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