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#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
##
## This file is part of the example classes of the Qt Toolkit.
##
## This file may be used under the terms of the GNU General Public
## License version 2.0 as published by the Free Software Foundation
## and appearing in the file LICENSE.GPL included in the packaging of
## this file. Please review the following information to ensure GNU
## General Public Licensing requirements will be met:
## http://www.trolltech.com/products/qt/opensource.html
##
## If you are unsure which license is appropriate for your use, please
## review the following information:
## http://www.trolltech.com/products/qt/licensing.html or contact the
## sales department at sales@trolltech.com.
##
## This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
## WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
##
#############################################################################
from PyQt4 import QtCore, QtGui
class PyAnalogClock(QtGui.QWidget):
"""PyAnalogClock(QtGui.QWidget)
Provides an analog clock custom widget with signals, slots and properties.
The implementation is based on the Analog Clock example provided with both
Qt and PyQt.
"""
# Emitted when the clock's time changes.
timeChanged = QtCore.pyqtSignal(QtCore.QTime)
# Emitted when the clock's time zone changes.
timeZoneChanged = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(PyAnalogClock, self).__init__(parent)
self.timeZoneOffset = 0
timer = QtCore.QTimer(self)
timer.timeout.connect(self.update)
timer.timeout.connect(self.updateTime)
timer.start(1000)
self.setWindowTitle(QtCore.QObject.tr(self, "Analog Clock"))
self.resize(200, 200)
self.hourHand = QtGui.QPolygon([
QtCore.QPoint(7, 8),
QtCore.QPoint(-7, 8),
QtCore.QPoint(0, -40)
])
self.minuteHand = QtGui.QPolygon([
QtCore.QPoint(7, 8),
QtCore.QPoint(-7, 8),
QtCore.QPoint(0, -70)
])
self.hourColor = QtGui.QColor(0, 127, 0)
self.minuteColor = QtGui.QColor(0, 127, 127, 191)
def paintEvent(self, event):
side = min(self.width(), self.height())
time = QtCore.QTime.currentTime()
time = time.addSecs(self.timeZoneOffset * 3600)
painter = QtGui.QPainter()
painter.begin(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(QtGui.QBrush(self.hourColor))
painter.save()
painter.rotate(30.0 * ((time.hour() + time.minute() / 60.0)))
painter.drawConvexPolygon(self.hourHand)
painter.restore()
painter.setPen(self.hourColor)
for i in range(0, 12):
painter.drawLine(88, 0, 96, 0)
painter.rotate(30.0)
painter.setPen(QtCore.Qt.NoPen)
painter.setBrush(QtGui.QBrush(self.minuteColor))
painter.save()
painter.rotate(6.0 * (time.minute() + time.second() / 60.0))
painter.drawConvexPolygon(self.minuteHand)
painter.restore()
painter.setPen(QtGui.QPen(self.minuteColor))
for j in range(0, 60):
if (j % 5) != 0:
painter.drawLine(92, 0, 96, 0)
painter.rotate(6.0)
painter.end()
def minimumSizeHint(self):
return QtCore.QSize(50, 50)
def sizeHint(self):
return QtCore.QSize(100, 100)
def updateTime(self):
self.timeChanged.emit(QtCore.QTime.currentTime())
# The timeZone property is implemented using the getTimeZone() getter
# method, the setTimeZone() setter method, and the resetTimeZone() method.
# The getter just returns the internal time zone value.
def getTimeZone(self):
return self.timeZoneOffset
# The setTimeZone() method is also defined to be a slot. The @pyqtSlot
# decorator is used to tell PyQt which argument type the method expects,
# and is especially useful when you want to define slots with the same
# name that accept different argument types.
@QtCore.pyqtSlot(int)
def setTimeZone(self, value):
self.timeZoneOffset = value
self.timeZoneChanged.emit(value)
self.update()
# Qt's property system supports properties that can be reset to their
# original values. This method enables the timeZone property to be reset.
def resetTimeZone(self):
self.timeZoneOffset = 0
self.timeZoneChanged.emit(0)
self.update()
# Qt-style properties are defined differently to Python's properties.
# To declare a property, we call pyqtProperty() to specify the type and,
# in this case, getter, setter and resetter methods.
timeZone = QtCore.pyqtProperty(int, getTimeZone, setTimeZone, resetTimeZone)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
clock = PyAnalogClock()
clock.show()
sys.exit(app.exec_())
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