pyqtgraph/examples/customPlot.py

# -*- coding: utf-8 -*-
"""
This example demonstrates the creation of a plot with 
DateAxisItem and a customized ViewBox. 
"""


import initExample ## Add path to library (just for examples; you do not need this)

import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
import numpy as np
import time

class CustomViewBox(pg.ViewBox):
    def __init__(self, *args, **kwds):
        pg.ViewBox.__init__(self, *args, **kwds)
        self.setMouseMode(self.RectMode)
        
    ## reimplement right-click to zoom out
    def mouseClickEvent(self, ev):
        if ev.button() == QtCore.Qt.RightButton:
            self.autoRange()
            
    def mouseDragEvent(self, ev):
        if ev.button() == QtCore.Qt.RightButton:
            ev.ignore()
        else:
            pg.ViewBox.mouseDragEvent(self, ev)


app = pg.mkQApp()

axis = pg.DateAxisItem(orientation='bottom')
vb = CustomViewBox()

pw = pg.PlotWidget(viewBox=vb, axisItems={'bottom': axis}, enableMenu=False, title="PlotItem with DateAxisItem and custom ViewBox<br>Menu disabled, mouse behavior changed: left-drag to zoom, right-click to reset zoom")
dates = np.arange(8) * (3600*24*356)
pw.plot(x=dates, y=[1,6,2,4,3,5,6,8], symbol='o')
pw.show()
pw.setWindowTitle('pyqtgraph example: customPlot')

r = pg.PolyLineROI([(0,0), (10, 10)])
pw.addItem(r)

## Start Qt event loop unless running in interactive mode or using pyside.
if __name__ == '__main__':
    import sys
    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()