一、最小话托盘后，调用showNormal()后窗口不刷新，解决办法如下：
重写showNormal 方法，调用父类方法后，repaint窗体
def showNormal(self):
super(LcdTime, self).showNormal()
self.repaint()二、透明显示窗口后无法拖动窗体：
必须拖动非透明区域，比如数字，目前没有找到好的解决方案。
# -*- coding: utf-8 -*-
import sys
from PyQt4 import QtCore, QtGui
class LcdTime(QtGui.QDialog):
def __init__(self, parent=None):
super(LcdTime, self).__init__(parent)
self.hour = QtGui.QLCDNumber(8, self)
self.hour.setGeometry(10, 10, 200, 80)
self.hour.setSegmentStyle(QtGui.QLCDNumber.Flat)
self.display()
self.timer = QtCore.QTimer()
self.connect(self.timer, QtCore.SIGNAL('timeout()'), self.display)
self.timer.start(1000)
self.build_tray()
self.resize(220, 100)
self.central()
self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
# 透明处理，移动需要拖动数字
self.setAttribute(QtCore.Qt.WA_TranslucentBackground, True)
self.setMouseTracking(True)
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self.dragPosition = event.globalPos() - self.frameGeometry().topLeft()
event.accept()
def mouseMoveEvent(self, event):
if event.buttons() == QtCore.Qt.LeftButton:
self.move(event.globalPos() - self.dragPosition)
event.accept()
def build_tray(self):
trayIcon = QtGui.QSystemTrayIcon(self)
trayIcon.setIcon(QtGui.QIcon('logo.png'))
trayIcon.show()
trayIcon.setToolTip('时钟')
trayIcon.activated.connect(self.trayClick)
menu = QtGui.QMenu()
normalAction = menu.addAction('正常显示')
miniAction = menu.addAction('最小化托盘')
exitAction = menu.addAction('退出')
normalAction.triggered.connect(self.showNormal)
exitAction.triggered.connect(self.exit)
miniAction.triggered.connect(self.showMinimized)
trayIcon.setContextMenu(menu)
def exit(self):
# 不设置Visible为False，退出后TrayIcon不会刷新
self.setVisible(False)
sys.exit(0)
def trayClick(self, reason):
if reason == QtGui.QSystemTrayIcon.DoubleClick:
self.showNormal()
self.repaint()
def display(self):
current = QtCore.QTime.currentTime()
self.hour.display(current.toString('HH:mm:ss'))
def showNormal(self):
super(LcdTime, self).showNormal()
self.repaint()
def central(self):
screen = QtGui.QDesktopWidget().screenGeometry()
size = self.geometry()
self.move(screen.width() - size.width(), 0)
app = QtGui.QApplication(sys.argv)
lcd = LcdTime()
lcd.show()
sys.exit(app.exec_())