65 lines
1.7 KiB
Python
65 lines
1.7 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
Demonstrates a way to put multiple axes around a single plot.
|
|
|
|
(This will eventually become a built-in feature of PlotItem)
|
|
|
|
"""
|
|
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
|
|
|
|
pg.mkQApp()
|
|
|
|
pw = pg.PlotWidget()
|
|
pw.show()
|
|
pw.setWindowTitle('pyqtgraph example: MultiplePlotAxes')
|
|
p1 = pw.plotItem
|
|
p1.setLabels(left='axis 1')
|
|
|
|
## create a new ViewBox, link the right axis to its coordinate system
|
|
p2 = pg.ViewBox()
|
|
p1.showAxis('right')
|
|
p1.scene().addItem(p2)
|
|
p1.getAxis('right').linkToView(p2)
|
|
p2.setXLink(p1)
|
|
p1.getAxis('right').setLabel('axis2', color='#0000ff')
|
|
|
|
## create third ViewBox.
|
|
## this time we need to create a new axis as well.
|
|
p3 = pg.ViewBox()
|
|
ax3 = pg.AxisItem('right')
|
|
p1.layout.addItem(ax3, 2, 3)
|
|
p1.scene().addItem(p3)
|
|
ax3.linkToView(p3)
|
|
p3.setXLink(p1)
|
|
ax3.setZValue(-10000)
|
|
ax3.setLabel('axis 3', color='#ff0000')
|
|
|
|
|
|
## Handle view resizing
|
|
def updateViews():
|
|
## view has resized; update auxiliary views to match
|
|
global p1, p2, p3
|
|
p2.setGeometry(p1.vb.sceneBoundingRect())
|
|
p3.setGeometry(p1.vb.sceneBoundingRect())
|
|
|
|
## need to re-update linked axes since this was called
|
|
## incorrectly while views had different shapes.
|
|
## (probably this should be handled in ViewBox.resizeEvent)
|
|
p2.linkedViewChanged(p1.vb, p2.XAxis)
|
|
p3.linkedViewChanged(p1.vb, p3.XAxis)
|
|
|
|
updateViews()
|
|
p1.vb.sigResized.connect(updateViews)
|
|
|
|
|
|
p1.plot([1,2,4,8,16,32])
|
|
p2.addItem(pg.PlotCurveItem([10,20,40,80,40,20], pen='b'))
|
|
p3.addItem(pg.PlotCurveItem([3200,1600,800,400,200,100], pen='r'))
|
|
|
|
if __name__ == '__main__':
|
|
pg.exec()
|