**pyqt_example_learn<shapedclock>

# from pyqt_example

import sys
from PyQt4 import QtGui,QtCore

class ShapedClock(QtGui.QWidget):
hourHand = QtGui.QPolygon([
QtCore.QPoint( 7 , 8 ),
QtCore.QPoint( - 7 , 8 ),
QtCore.QPoint(0, - 40 )
])

minuteHand = QtGui.QPolygon([
QtCore.QPoint( 7 , 8 ),
QtCore.QPoint( - 7 , 8 ),
QtCore.QPoint(0, - 70 )
])

hourColor = QtGui.QColor( 127 , 0, 127 )
minuteColor = QtGui.QColor(0, 127 , 127 , 191 )

def __init__ (self,parent = None):
super(ShapedClock,self). __init__ (parent,
QtCore.Qt.FramelessWindowHint | QtCore.Qt.WindowSystemMenuHint)
timer = QtCore.QTimer(self)
timer.timeout.connect(self.update)
timer.start( 1000 )

quit_action = QtGui.QAction( " E&xit " ,self,shortcut = " Ctrl+Q " ,
triggered = QtGui.qApp.quit)
self.addAction(quit_action)
self.setContextMenuPolicy(QtCore.Qt.ActionsContextMenu)
self.setToolTip( ' xxx ' )
self.setWindowTitle(self.tr( " clock " ))
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 paintEvent(self, event):
side = min(self.width(), self.height())
time = QtCore.QTime.currentTime()

painter = QtGui.QPainter(self)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
painter.translate(self.width() / 2 , self.height() / 2 )
painter.scale(side / 200.0 , side / 200.0 )

painter.setPen(QtCore.Qt.NoPen)
painter.setBrush(ShapedClock.hourColor)

painter.save()
painter.rotate( 30.0 * ((time.hour() + time.minute() / 60.0 )))
painter.drawConvexPolygon(ShapedClock.hourHand)
painter.restore()

painter.setPen(ShapedClock.hourColor)

for i in range( 12 ):
painter.drawLine( 88 , 0, 96 , 0)
painter.rotate( 30.0 )

painter.setPen(QtCore.Qt.NoPen)
painter.setBrush(ShapedClock.minuteColor)

painter.save()
painter.rotate( 6.0 * (time.minute() + time.second() / 60.0 ))
painter.drawConvexPolygon(ShapedClock.minuteHand)
painter.restore()

painter.setPen(ShapedClock.minuteColor)

for j in range( 60 ):
if (j % 5 ) != 0:
painter.drawLine( 92 , 0, 96 , 0)

painter.rotate( 6.0 )

def resizeEvent(self, event):
side = min(self.width(), self.height())

maskedRegion = QtGui.QRegion(self.width() / 2 - side / 2 , self.height() / 2 - side / 2 , side, side, QtGui.QRegion.Ellipse)
self.setMask(maskedRegion)

def sizeHint(self):
return QtCore.QSize( 100 , 100 )

if __name__ == ' __main__ ' :
app = QtGui.QApplication(sys.argv)
clock = ShapedClock()
clock.show()
sys.exit(app.exec_())

转载于:https://www.cnblogs.com/eth0/archive/2011/07/07/2100055.html