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我是PyQtGraph的新手，想用它快速可视化我的数据采集。以前我使用的是matplotlib，其中重绘图形是我的瓶颈。在转换到PyQtGraph之后，我目前只缺少matplotlib的一个功能。也就是说，返回鼠标光标的x-和y-坐标。

如何调用/模拟使用PyQtGraph绘制的绘图中鼠标光标的x和y坐标的返回？

编辑！-在实现了leongold的提示之后，代码能够在不损失速度的情况下返回mousecursor位置。代码如下：import numpy

import pyqtgraph as pg

from pyqtgraph.Qt import QtGui, QtCore

def gaussian(A, B, x):

return A * numpy.exp(-(x/(2. * B))**2.)

def mouseMoved(evt):

mousePoint = p.vb.mapSceneToView(evt[0])

label.setText(”

x = %0.2f,

y = %0.2f

” % (mousePoint.x(), mousePoint.y()))

# Initial data frame

x = numpy.linspace(-5., 5., 10000)

y = gaussian(5., 0.2, x)

# Generate layout

win = pg.GraphicsWindow()

label = pg.LabelItem(justify = “right”)

win.addItem(label)

p = win.addPlot(row = 1, col = 0)

plot = p.plot(x, y, pen = “y”)

proxy = pg.SignalProxy(p.scene().sigMouseMoved, rateLimit=60, slot=mouseMoved)

# Update layout with new data

i = 0

while i < 500:

noise = numpy.random.normal(0, .2, len(y))

y_new = y + noise

plot.setData(x, y_new, pen = “y”, clear = True)

p.enableAutoRange(“xy”, False)

pg.QtGui.QApplication.processEvents()

i += 1

win.close()