50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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"""
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Created on 2019年5月2日
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@author: weike32
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@site: https://pyqt.site ,https://github.com/weike32
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@email: 394967319@qq.com
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@file: CopyContent
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@description: 查阅了很多博客，如果有异，可以联系作者邮箱。本Demo仅作学习参考用，保有后续相关权益。
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"""
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import sys
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import numpy as np
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import pyqtgraph as pg
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from PyQt5 import QtCore
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from PyQt5.QtWidgets import QApplication, QMainWindow
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class Ui_Form(object):
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def setupUi(self, Form):
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Form.setObjectName("Form")
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Form.resize(726, 595)
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self.graphicsView = pg.PlotWidget(Form)
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self.graphicsView.setGeometry(QtCore.QRect(75, 131, 621, 441))
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self.graphicsView.setObjectName("graphicsView")
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class MyWindow(QMainWindow, Ui_Form):
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def __init__(self, parent=None):
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super(MyWindow, self).__init__(parent)
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self.setupUi(self)
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x = np.linspace(-100, 100, 1000)
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data = np.sin(x) / x
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self.graphicsView.plot(data, pen=(255, 255, 255, 200))
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self.label = pg.TextItem(text="横坐标：{}".format(0))
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self.graphicsView.addItem(self.label)
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self.setMouseTracking(True)
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self.graphicsView.scene().sigMouseMoved.connect(self.onMouseMoved)
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def onMouseMoved(self, evt):
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if self.graphicsView.plotItem.vb.mapSceneToView(evt):
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point = self.graphicsView.plotItem.vb.mapSceneToView(evt)
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self.label.setHtml("<p style='color:white'>横坐标：{0}</p>".format(point.x()))
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if __name__ == '__main__':
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app = QApplication(sys.argv)
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myWin = MyWindow()
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myWin.show()
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sys.exit(app.exec_())
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