53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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##
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## This example demonstrates the creation of a plot with a customized
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## AxisItem and ViewBox.
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##
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import initExample ## Add path to library (just for examples; you do not need this)
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import pyqtgraph as pg
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from pyqtgraph.Qt import QtCore, QtGui
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import numpy as np
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import time
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class DateAxis(pg.AxisItem):
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def tickStrings(self, values, scale, spacing):
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return [time.strftime('%b %Y', time.localtime(x)) for x in values]
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class CustomViewBox(pg.ViewBox):
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def __init__(self, *args, **kwds):
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pg.ViewBox.__init__(self, *args, **kwds)
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self.setMouseMode(self.RectMode)
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## reimplement right-click to zoom out
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def mouseClickEvent(self, ev):
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if ev.button() == QtCore.Qt.RightButton:
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self.autoRange()
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def mouseDragEvent(self, ev):
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if ev.button() == QtCore.Qt.RightButton:
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ev.ignore()
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else:
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pg.ViewBox.mouseDragEvent(self, ev)
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app = pg.mkQApp()
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axis = DateAxis(orientation='bottom')
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vb = CustomViewBox()
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pw = pg.PlotWidget(viewBox=vb, axisItems={'bottom': axis}, enableMenu=False, title="PlotItem with custom axis and ViewBox<br>Menu disabled, mouse behavior changed: left-drag to zoom, right-click to reset zoom")
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dates = np.arange(8) * (3600*24*356)
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pw.plot(x=dates, y=[1,6,2,4,3,5,6,8], symbol='o')
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pw.show()
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r = pg.PolyLineROI([(0,0), (10, 10)])
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pw.addItem(r)
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## Start Qt event loop unless running in interactive mode or using pyside.
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import sys
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if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
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QtGui.QApplication.instance().exec_()
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