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#!/usr/bin/python
import sys
#import Qwt
from PyQt5 import Qwt
from PyQt5.QtCore import Qt, qIsNaN, qRound
from PyQt5.QtGui import QColor, QPen, QBrush, QFontMetrics
from PyQt5.QtWidgets import QApplication, QCheckBox, QToolBar, QToolButton, QLabel, QComboBox, QSlider, QSizePolicy, QMainWindow
from PyQt5.QtPrintSupport import QPrintDialog, QPrinter
class MyZoomer(Qwt.QwtPlotZoomer):
def __init__(self, canvas):
Qwt.QwtPlotZoomer.__init__(self, canvas )
self.setTrackerMode( Qwt.QwtPicker.AlwaysOn )
def trackerTextF( self, pos ):
bg = QColor( Qt.white )
bg.setAlpha( 200 )
text = Qwt.QwtPlotZoomer.trackerTextF( pos )
text.setBackgroundBrush( QBrush( bg ) )
return text
class SpectrogramData(Qwt.QwtRasterData):
def __init__(self):
Qwt.QwtRasterData.__init__(self)
self.setInterval( Qt.XAxis, Qwt.QwtInterval( -1.5, 1.5 ) )
self.setInterval( Qt.YAxis, Qwt.QwtInterval( -1.5, 1.5 ) )
self.setInterval( Qt.ZAxis, Qwt.QwtInterval( 0.0, 10.0 ) )
def value( self, x, y ):
c = 0.842
#c = 0.33
v1 = x * x + ( y - c ) * ( y + c )
v2 = x * ( y + c ) + x * ( y + c )
return 1.0 / ( v1 * v1 + v2 * v2 )
class LinearColorMapRGB(Qwt.QwtLinearColorMap):
def __init__(self):
Qwt.QwtLinearColorMap.__init__(self, Qt.darkCyan, Qt.red, Qwt.QwtColorMap.RGB )
self.addColorStop( 0.1, Qt.cyan )
self.addColorStop( 0.6, Qt.green )
self.addColorStop( 0.95, Qt.yellow )
class LinearColorMapIndexed(Qwt.QwtLinearColorMap):
def __init__(self):
Qwt.QwtLinearColorMap.__init__( self, Qt.darkCyan, Qt.red, Qwt.QwtColorMap.Indexed )
self.addColorStop( 0.1, Qt.cyan )
self.addColorStop( 0.6, Qt.green )
self.addColorStop( 0.95, Qt.yellow )
class HueColorMap(Qwt.QwtColorMap):
def __init__(self):
Qwt.QwtColorMap.__init__(self)
self.d_hue1 = 0
self.d_hue2 = 359
self.d_saturation = 150
self.d_value = 200
self.d_rgbTable = []
self.updateTable()
def rgb(self, interval, value ):
if ( qIsNaN(value) ):
return 0
width = interval.width()
if ( width <= 0 ):
return 0
if ( value <= interval.minValue() ):
return self.d_rgbMin
if ( value >= interval.maxValue() ):
return self.d_rgbMax
ratio = ( value - interval.minValue() ) / width
hue = self.d_hue1 + qRound( ratio * ( self.d_hue2 - self.d_hue1 ) )
if ( hue >= 360 ):
hue -= 360
if ( hue >= 360 ):
hue = hue % 360
return self.d_rgbTable[hue]
def colorIndex(self, a0, a1 ):
# we don't support indexed colors
return 0
def updateTable(self):
for i in range(360):
self.d_rgbTable.append(QColor.fromHsv( i, self.d_saturation, self.d_value ).rgb())
self.d_rgbMin = self.d_rgbTable[ self.d_hue1 % 360 ]
self.d_rgbMax = self.d_rgbTable[ self.d_hue2 % 360 ]
class AlphaColorMap(Qwt.QwtAlphaColorMap):
def __init__(self):
Qwt.QwtAlphaColorMap.__init__(self)
#setColor( QColor("DarkSalmon") )
self.setColor( QColor("SteelBlue") )
class Plot( Qwt.QwtPlot ):
def __init__(self, parent):
Qwt.QwtPlot.__init__(self, parent )
self.RGBMap = 0
self.IndexMap = 1
self.HueMap = 2
self.AlphaMap = 3
self.d_alpha = 255
self.d_spectrogram = Qwt.QwtPlotSpectrogram()
self.d_spectrogram.setRenderThreadCount( 0 ) # use system specific thread count
self.d_spectrogram.setCachePolicy( Qwt.QwtPlotRasterItem.PaintCache )
contourLevels=[]
for level in range(1,20,2):
contourLevels.append(0.5*level)
self.d_spectrogram.setContourLevels( contourLevels )
self.d_spectrogram.setData( SpectrogramData() )
self.d_spectrogram.attach( self )
zInterval = self.d_spectrogram.data().interval( Qt.ZAxis )
# A color bar on the right axis
self.rightAxis = self.axisWidget( Qwt.QwtPlot.yRight )
self.rightAxis.setTitle( "Intensity" )
self.rightAxis.setColorBarEnabled( True )
self.setAxisScale( Qwt.QwtPlot.yRight, zInterval.minValue(), zInterval.maxValue() )
self.enableAxis( Qwt.QwtPlot.yRight )
self.plotLayout().setAlignCanvasToScales( True )
self.setColorMap( self.RGBMap )
# LeftButton for the zooming
# MidButton for the panning
# RightButton: zoom out by 1
# Ctrl+RighButton: zoom out to full size
self.zoomer = MyZoomer( self.canvas() )
self.zoomer.setMousePattern( Qwt.QwtEventPattern.MouseSelect2, Qt.RightButton, Qt.ControlModifier )
self.zoomer.setMousePattern( Qwt.QwtEventPattern.MouseSelect3, Qt.RightButton )
self.panner = Qwt.QwtPlotPanner( self.canvas() )
self.panner.setAxisEnabled( Qwt.QwtPlot.yRight, False )
self.panner.setMouseButton( Qt.MidButton )
# Avoid jumping when labels with more/less digits
# appear/disappear when scrolling vertically
fm = QFontMetrics ( self.axisWidget( Qwt.QwtPlot.yLeft ).font() )
sd = self.axisScaleDraw( Qwt.QwtPlot.yLeft )
sd.setMinimumExtent( fm.width( "100.00" ) )
c = QColor( Qt.darkBlue )
self.zoomer.setRubberBandPen( c )
self.zoomer.setTrackerPen( c )
def showContour( self, on ):
self.d_spectrogram.setDisplayMode( Qwt.QwtPlotSpectrogram.ContourMode, on )
self.replot()
def showSpectrogram( self, on ):
self.d_spectrogram.setDisplayMode( Qwt.QwtPlotSpectrogram.ImageMode, on )
if (on):
self.d_spectrogram.setDefaultContourPen( QPen( Qt.black, 0 ) )
else:
self.d_spectrogram.setDefaultContourPen( QPen( Qt.NoPen ) )
self.replot()
def setColorMap( self, type ):
self.axis = self.axisWidget( Qwt.QwtPlot.yRight )
zInterval = self.d_spectrogram.data().interval( Qt.ZAxis )
self.d_mapType = type
alpha = self.d_alpha
if ( type == self.HueMap ):
self.d_spectrogram.setColorMap( HueColorMap() )
self.axis.setColorMap( zInterval, HueColorMap() )
elif ( type == self.AlphaMap):
self.alpha = 255
self.d_spectrogram.setColorMap( AlphaColorMap() )
self.axis.setColorMap( zInterval, AlphaColorMap() )
elif ( type == self.IndexMap):
self.d_spectrogram.setColorMap( LinearColorMapIndexed() )
self.axis.setColorMap( zInterval, LinearColorMapIndexed() )
elif ( type == self.RGBMap):
self.d_spectrogram.setColorMap( LinearColorMapRGB() )
self.axis.setColorMap( zInterval, LinearColorMapRGB() )
self.d_spectrogram.setAlpha( alpha )
self.replot()
def setAlpha( self, alpha ):
# setting an alpha value doesn't make sense in combination
# with a color map interpolating the alpha value
self.d_alpha = alpha
if ( self.d_mapType != self.AlphaMap ):
self.d_spectrogram.setAlpha( alpha )
self.replot()
def printPlot(self): # Creates an empty file XXXXX
printer = QPrinter( QPrinter.HighResolution )
printer.setOrientation( QPrinter.Landscape )
printer.setDocName( "spectrogram.pdf" )
printer.setCreator( "Spectrogram example" )
dialog = QPrintDialog ( printer )
if ( dialog.exec_() ):
renderer = Qwt.QwtPlotRenderer()
if ( printer.colorMode() == QPrinter.GrayScale ):
renderer.setDiscardFlag( Qwt.QwtPlotRenderer.DiscardBackground )
renderer.setDiscardFlag( Qwt.QwtPlotRenderer.DiscardCanvasBackground )
renderer.setDiscardFlag( Qwt.QwtPlotRenderer.DiscardCanvasFrame )
renderer.setLayoutFlag( Qwt.QwtPlotRenderer.FrameWithScales )
renderer.renderTo( self, printer )
class MainWindow( QMainWindow ):
def __init__(self, *args):
QMainWindow.__init__(self, *args )
self.d_plot = Plot( self )
self.setCentralWidget( self.d_plot )
self.toolBar = QToolBar( self )
self.btnPrint = QToolButton( self.toolBar )
self.btnPrint.setText( "Print" )
self.btnPrint.setToolButtonStyle( Qt.ToolButtonTextUnderIcon )
self.toolBar.addWidget( self.btnPrint )
self.btnPrint.clicked.connect(self.d_plot.printPlot )
self.toolBar.addSeparator()
self.toolBar.addWidget( QLabel("Color Map " ) )
self.mapBox = QComboBox( self.toolBar )
self.mapBox.addItem( "RGB" )
self.mapBox.addItem( "Indexed Colors" )
self.mapBox.addItem( "Hue" )
self.mapBox.addItem( "Alpha" )
self.mapBox.setSizePolicy( QSizePolicy.Fixed, QSizePolicy.Fixed )
self.toolBar.addWidget( self.mapBox )
self.mapBox.currentIndexChanged['int'].connect(self.d_plot.setColorMap )
self.toolBar.addWidget( QLabel( " Opacity " ) )
self.slider = QSlider( Qt.Horizontal )
self.slider.setRange( 0, 255 )
self.slider.setValue( 255 )
self.slider.valueChanged['int'].connect(self.d_plot.setAlpha )
self.toolBar.addWidget( self.slider )
self.toolBar.addWidget( QLabel(" " ) )
self.btnSpectrogram = QCheckBox( "Spectrogram", self.toolBar )
self.toolBar.addWidget( self.btnSpectrogram )
self.btnSpectrogram.toggled['bool'].connect(self.d_plot.showSpectrogram )
self.btnContour = QCheckBox( "Contour", self.toolBar )
self.toolBar.addWidget( self.btnContour )
self.btnContour.toggled['bool'].connect(self.d_plot.showContour )
self.addToolBar( self.toolBar )
self.btnSpectrogram.setChecked( True )
self.btnContour.setChecked( False )
if __name__ == '__main__':
a = QApplication(sys.argv)
a.setStyle( "Windows" )
mainWindow = MainWindow()
mainWindow.resize( 600, 400 )
mainWindow.show()
sys.exit(a.exec_())
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