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53 lines
1.7 KiB
53 lines
1.7 KiB
6 years ago
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from PyQt4 import QtCore, QtGui, Qt
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from PyQt4.QtGui import QApplication, QMainWindow
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import sys, math
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class MyMainScreen(QMainWindow):
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def __init__(self, parent=None):
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QtGui.QMainWindow.__init__(self, parent)
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self.timer = QtCore.QTimer(self)
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self.timer.setInterval(100)
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self.timer.timeout.connect(self.blink)
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self.timer.start()
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self.resize(500, 500)
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self.centralwidget = QtGui.QWidget(self)
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self.horizontalLayout = QtGui.QHBoxLayout(self.centralwidget)
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self.setCentralWidget(self.centralwidget)
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self.menubar = QtGui.QMenuBar(self)
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self.menubar.setGeometry(QtCore.QRect(0, 0, 500, 22))
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self.setMenuBar(self.menubar)
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self.statusbar = QtGui.QStatusBar(self)
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self.setStatusBar(self.statusbar)
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QtCore.QMetaObject.connectSlotsByName(self)
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self.n = 0
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def blink(self):
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self.n += 0.1
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self.n = self.n % 20
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self.repaint()
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def paintEvent(self, event):
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painter = QtGui.QPainter(self)
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painter.setRenderHint(QtGui.QPainter.Antialiasing)
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painter.setRenderHint(QtGui.QPainter.HighQualityAntialiasing)
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painter.setPen(QtGui.QPen(QtCore.Qt.red, 2))
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step = 2
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amp = (self.height()/2)*0.8
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for i in range(0, self.width(), step):
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y0 = round(self.height()/2 + amp * math.sin(2*math.pi*self.n*(i/180)))
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y1 = round(self.height()/2 + amp * math.sin(2*math.pi*self.n*((i+step)/180)))
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painter.drawLine(QtCore.QLine(i, y0, i+step, y1))
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if __name__ == "__main__":
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app = QApplication(sys.argv)
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mainscreen = MyMainScreen()
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mainscreen.show()
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app.exec_()
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