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#!/usr/bin/python
import sys
import math
#import Qwt
from PyQt5 import Qwt
from PyQt5.QtCore import Qt, QTime, QPointF, QSize
from PyQt5.QtGui import QColor, QTransform
from PyQt5.QtWidgets import QApplication, QFrame
from PyQt5.QtGui import QPolygonF
class Curve(Qwt.QwtPlotCurve):
def __init__(self):
Qwt.QwtPlotCurve.__init__(self)
self.d_transform = QTransform()
def setTransformation(self, transform ):
self.d_transform = transform;
class Curve1(Curve):
def __init__(self):
Curve.__init__(self)
self.setPen( QColor( 150, 150, 200 ), 2 )
self.setStyle( Qwt.QwtPlotCurve.Lines )
curveFitter = Qwt.QwtSplineCurveFitter()
curveFitter.setSplineSize( 150 )
self.setCurveFitter( curveFitter )
self.setCurveAttribute( Qwt.QwtPlotCurve.Fitted, True )
symbol = Qwt.QwtSymbol( Qwt.QwtSymbol.XCross )
symbol.setPen( Qt.yellow )
symbol.setSize( 7 )
self.setSymbol( symbol )
# somewhere to the left
self.transform = QTransform()
self.transform.scale( 1.5, 1.0 );
self.transform.translate( 1.5, 3.0 );
self.setTransformation( self.transform )
def points(self, phase ):
points = QPolygonF()
numSamples = 15;
for i in range(numSamples):
v = 6.28 * i / ( numSamples - 1 )
points += QPointF( math.sin( v - phase ), v )
return points
def updateSamples( self, phase ):
self.setSamples( self.d_transform.map( self.points( phase )))
class Curve2(Curve):
def __init__(self):
Curve.__init__(self)
self.setStyle( Qwt.QwtPlotCurve.Sticks );
self.setPen( QColor( 200, 150, 50 ) );
self.setSymbol( Qwt.QwtSymbol( Qwt.QwtSymbol.Ellipse,QColor( Qt.gray ), QColor( Qt.yellow ), QSize( 5, 5 ) ) )
def points(self, phase ):
points = QPolygonF()
numSamples = 50
for i in range(numSamples):
v = 10.0 * i / ( numSamples - 1 )
points += QPointF( v, math.cos( 3.0 * ( v + phase ) ) )
return points
def updateSamples( self, phase ):
a=self.points(phase)
b= self.d_transform.map(a)
self.setSamples( b )
class Curve3(Curve):
def __init__(self):
Curve.__init__(self)
self.setStyle( Qwt.QwtPlotCurve.Lines )
self.setPen( QColor( 100, 200, 150 ), 2 )
curveFitter = Qwt.QwtSplineCurveFitter()
curveFitter.setFitMode( Qwt.QwtSplineCurveFitter.ParametricSpline )
curveFitter.setSplineSize( 200 )
self.setCurveFitter( curveFitter )
self.setCurveAttribute( Qwt.QwtPlotCurve.Fitted, True )
# somewhere in the top right corner
transform = QTransform()
transform.translate( 7.0, 7.5 )
transform.scale( 2.0, 2.0 )
self.setTransformation( transform )
def points( self, phase ):
points = QPolygonF()
numSamples = 9
for i in range(numSamples):
v = i * 2.0 * 3.14159 / ( numSamples - 1 )
points += QPointF( math.sin( v - phase ), math.cos( 3.0 * ( v + phase ) ) )
return points;
def updateSamples( self, phase ):
self.setSamples( self.d_transform.map( self.points( phase )))
class Curve4(Curve):
def __init__(self):
Curve.__init__(self)
self.d_points = QPolygonF()
self.setStyle( Qwt.QwtPlotCurve.Lines )
self.setPen( Qt.red, 2 )
self.initSamples()
# somewhere in the center
transform = QTransform()
transform.translate( 7.0, 3.0 )
transform.scale( 1.5, 1.5 )
self.setTransformation( transform )
def points(self, phase ):
speed = 0.05
s = speed * math.sin( phase );
c = math.sqrt( 1.0 - s * s );
for i in range(len(self.d_points)):
p = self.d_points[i]
u = p.x()
v = p.y()
self.d_points[i].setX( u * c - v * s )
self.d_points[i].setY( v * c + u * s )
return self.d_points;
def initSamples(self):
numSamples = 15
for i in range(numSamples):
angle = i * ( 2.0 * 3.14159 / ( numSamples - 1 ) );
p= QPointF( math.cos( angle ), math.sin( angle ) );
if ( i % 2 ):
p *= 0.4
self.d_points += p
def updateSamples( self, phase ):
self.setSamples( self.d_transform.map( self.points( phase )))
class Plot( Qwt.QwtPlot):
def __init__(self,parent=None):
Qwt.QwtPlot.__init__(self, parent)
self.d_time = QTime()
self.d_curves = []
self.setAutoReplot( False )
self.setTitle( "Animated Curves" )
# hide all axes
for axis in range(Qwt.QwtPlot.axisCnt):
self.enableAxis( axis, False )
#self.plotLayout.setCanvasMargin( 10 )
self.d_curves.append(Curve1())
self.d_curves.append(Curve2())
self.d_curves.append(Curve3())
self.d_curves.append(Curve4())
self.updateCurves()
for i in range(len(self.d_curves)):
self.d_curves[i].attach( self )
self.d_time.start()
self.startTimer( 40 )
def timerEvent( self, event ):
self.updateCurves()
self.replot()
def updateCurves(self):
speed = 2 * 3.14159 / 25000.0 # a cycle every 25 seconds
phase = self.d_time.elapsed() * speed
for i in range(len(self.d_curves)):
self.d_curves[i].updateSamples( phase )
if __name__ == '__main__':
a = QApplication(sys.argv)
plot = Plot()
#if USE_OPENGL
#canvas = Qwt.QwtPlotGLCanvas()
#canvas.setFrameStyle( Qwt.QwtPlotGLCanvas.NoFrame )
#else
canvas = Qwt.QwtPlotCanvas();
canvas.setFrameStyle( QFrame.NoFrame );
canvas.setPaintAttribute( Qwt.QwtPlotCanvas.BackingStore, False )
#endif
plot.setCanvas( canvas )
plot.setCanvasBackground( QColor( 30, 30, 50 ) )
plot.resize( 400, 400 )
plot.show()
sys.exit(a.exec_())
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