pyqtgraph: align the ticks of the x-axes in different plots

Question

This is a follow up to this question.

The question is how to adapt the x-axis scaling of multiple pyqtgraphs when one of the graphs is rescaled. My desired result is tha

Answer 1

I just found the answer in this question.

Instead of connecting to the sigRangeChanged event we can directly link the axes scales by w2.setXLink(w1). Of course we have to remove the connections to sigRangeChanged or the scales will shoot to the sky. Here is the example code:

import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
import numpy as np
from pyqtgraph.dockarea import *
import sys

app = QtGui.QApplication(sys.argv)

win = QtGui.QMainWindow()
area = DockArea()
win.setCentralWidget(area)
win.resize(1000,500)
win.setWindowTitle('pyqtgraph example: dockarea')


d1 = Dock("Dock1")
d2 = Dock("Dock2")
area.addDock(d1, 'bottom')
area.addDock(d2, 'bottom', d1)

w1 = pg.PlotWidget(title="Dock 1 plot")
w1.plot(np.random.normal(size=100)*1e12)
w1.plotItem.showGrid(x=True,y=True,alpha=1)
d1.addWidget(w1)

w2 = pg.PlotWidget(title="Dock 2 plot")
w2.plot(np.random.normal(size=100))
w2.plotItem.showGrid(x=True,y=True,alpha=1)
w2.setXLink(w1)
d2.addWidget(w2)

win.show()

sys.exit(app.exec_())