在 pyqtgraph 中进行鼠标交互后将缩放恢复为默认级别

Question

有没有办法恢复 pyqtgraph 图的默认缩放级别。我知道图中显示的小按钮（图的左下角）可以恢复默认缩放级别。我需要的是当特定事件发生时，我想从代码中恢复它（在我放大或缩小之后）。

我查看了 pyqtgraph 文档，但找不到任何类似的函数。

这是最小的可重现代码：

from PyQt5 import QtGui  
import pyqtgraph as pg
import numpy as np

app = QtGui.QApplication([])
w = QtGui.QWidget()
btn = QtGui.QPushButton('press me')
text = QtGui.QLineEdit('enter text')
listw = QtGui.QListWidget()
plot = pg.PlotWidget()

layout = QtGui.QGridLayout()
w.setLayout(layout)
layout.addWidget(btn, 0, 0) 
layout.addWidget(text, 1, 0) 
layout.addWidget(listw, 2, 0) 
layout.addWidget(plot, 0, 1, 3, 1) 

x = np.random.normal(size=1000)
y = np.random.normal(size=1000)
plot.plot(x, y, pen=(2,3), symbol='d')

w.show()

app.exec_()

Answer 1

如果调用了the source code is analyzed, it is observed that when the button you indicate is pressed, the enableAutoRange()方法，那么就是必须使用的方法：

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

if __name__ == "__main__":

    app = QtGui.QApplication([])
    w = QtGui.QWidget()
    btn = QtGui.QPushButton("press me")
    text = QtGui.QLineEdit("enter text")
    listw = QtGui.QListWidget()
    plot = pg.PlotWidget()

    btn.clicked.connect(lambda: <b>plot.getPlotItem().enableAutoRange()</b>)

    layout = QtGui.QGridLayout()
    w.setLayout(layout)
    layout.addWidget(btn, 0, 0)
    layout.addWidget(text, 1, 0)
    layout.addWidget(listw, 2, 0)
    layout.addWidget(plot, 0, 1, 3, 1)

    x = np.random.normal(size=1000)
    y = np.random.normal(size=1000)
    plot.plot(x, y, pen=(2, 3), symbol="d")

    w.show()

    app.exec_()

在 pyqtgraph 中进行鼠标交互后将缩放恢复为默认级别

Restore zoom to default level after mouse interactions in pyqtgraph

python

pyqt

pyqtgraph

pyqt5