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#!/usr/bin/python
import sys
#import Qwt
from PyQt4 import Qwt
from PyQt4.QtCore import Qt, QSize
from PyQt4.QtGui import QColor, QPixmap, QFont, QBrush, QMainWindow, QWidget, QToolBar, QToolButton, QHBoxLayout, QLabel, QApplication, QPalette, QComboBox, QSizePolicy
class Histogram(Qwt.QwtPlotHistogram):
def __init__(self,title, symbolColor ):
Qwt.QwtPlotHistogram.__init__(self,title)
self.setStyle( Qwt.QwtPlotHistogram.Columns )
self.setColor( symbolColor )
def setValues(self, values ):
numValues = len(values)
#QVector<QwtIntervalSample> samples( numValues )
samples = []
for i in range(numValues):
interval = Qwt.QwtInterval( i , i + 1.0 )
interval.setBorderFlags( Qwt.QwtInterval.ExcludeMaximum )
samples.append(Qwt.QwtIntervalSample( values[i], interval ))
self.setSamples( samples )
def setColor(self, color ):
c = QColor(color)
c.setAlpha( 180 )
self.setBrush( QBrush( c ) )
class TVPlot( Qwt.QwtPlot):
def __init__(self, parent=None):
Qwt.QwtPlot.__init__(self, parent )
self.grid=None
self.setTitle( "Watching TV during a weekend" )
canvas = Qwt.QwtPlotCanvas()
canvas.setPalette( QPalette(Qt.gray) )
canvas.setBorderRadius( 10 )
self.setCanvas( canvas )
self.plotLayout().setAlignCanvasToScales( True )
self.setAxisTitle( Qwt.QwtPlot.yLeft, "Number of People" )
self.setAxisTitle( Qwt.QwtPlot.xBottom, "Number of Hours" )
self.legend = Qwt.QwtLegend()
self.legend.setDefaultItemMode( Qwt.QwtLegendData.Checkable )
self.insertLegend( self.legend, Qwt.QwtPlot.RightLegend )
self.populate()
self.legend.checked['QVariant','bool','int'].connect(self.showItem )
self.replot() # creating the legend items
"""self.items = Qwt.QwtPlotDict.itemList( Qwt.QwtPlotItem.Rtti_PlotHistogram )
for i in range(len(self.items)):
if ( i == 0 ):
#const QVariant
itemInfo = itemToInfo( self.items[i] )
#QwtLegendLabel *
legendLabel = legend.legendWidget( itemInfo )
if ( legendLabel ):
legendLabel.setChecked( True )
self.items[i].setVisible( True )
else:
self.items[i].setVisible( False )"""
self.setAutoReplot( True )
def populate(self):
self.grid = Qwt.QwtPlotGrid()
self.grid.enableX( False )
self.grid.enableY( True )
self.grid.enableXMin( False )
self.grid.enableYMin( False )
self.grid.setMajorPen( Qt.black, 0, Qt.DotLine )
self.grid.attach( self )
juneValues = [ 7.0, 19.0, 24.0, 32.0, 10.0, 5.0, 3.0 ]
novemberValues = [ 4.0, 15.0, 22.0, 34.0, 13.0, 8.0, 4.0 ]
histogramJune = Histogram( "Summer", Qt.red )
histogramJune.setValues( juneValues )
histogramJune.attach( self )
histogramNovember = Histogram( "Winter", Qt.blue )
histogramNovember.setValues( novemberValues )
histogramNovember.attach( self )
def exportPlot(self):
print("Export Plot")
#renderer = Qwt.QwtPlotRenderer()
#renderer.exportTo( self, "tvplot.pdf" )
def setMode( self, mode):
#QwtPlotItemList
print("Set mode %d"%mode)
"""items = self.itemList( Qwt.QwtPlotItem.Rtti_PlotHistogram )
for i in range(len(items)):
histogram = items[i]
if ( mode < 3 ):
histogram.setStyle(mode)
histogram.setSymbol( )
pen = QPen( Qt.black, 0 )
if ( mode == Qwt.QwtPlotHistogram.Lines ):
pen.setBrush( histogram.brush() )
histogram.setPen( pen )
else:
histogram.setStyle( Qwt.QwtPlotHistogram.Columns )
symbol = Qwt.QwtColumnSymbol( Qwt.QwtColumnSymbol.Box )
symbol.setFrameStyle( Qwt.QwtColumnSymbol.Raised )
symbol.setLineWidth( 2 )
symbol.setPalette( QPalette( histogram.brush().color() ) )
histogram.setSymbol( symbol )"""
def showItem( self, itemInfo, on ):
print("Doesn't work yet.")
plotItem = self.infoToItem( itemInfo )
if ( plotItem):
plotItem.setVisible( on )
class MainWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.d_plot = TVPlot(self)
self.setCentralWidget( self.d_plot )
self.toolBar = QToolBar( self )
self.typeBox = QComboBox( self.toolBar )
self.typeBox.addItem( "Outline" )
self.typeBox.addItem( "Columns" )
self.typeBox.addItem( "Lines" )
self.typeBox.addItem( "Column Symbol" )
self.typeBox.setCurrentIndex( self.typeBox.count() - 1 )
self.typeBox.setSizePolicy( QSizePolicy.Fixed, QSizePolicy.Fixed )
self.btnExport = QToolButton( self.toolBar )
self.btnExport.setText( "Export" )
self.btnExport.setToolButtonStyle( Qt.ToolButtonTextUnderIcon )
#connect( btnExport, SIGNAL( clicked() ), d_plot, SLOT( exportPlot() ) )
self.btnExport.clicked.connect(self.d_plot.exportPlot)
self.toolBar.addWidget( self.typeBox )
self.toolBar.addWidget( self.btnExport )
self.addToolBar( self.toolBar )
self.d_plot.setMode( self.typeBox.currentIndex() )
self.typeBox.currentIndexChanged['int'].connect(self.d_plot.setMode)
a = QApplication(sys.argv)
mainWindow = MainWindow()
mainWindow.resize( 600, 400 )
mainWindow.show()
sys.exit(a.exec_())
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