| 26 | |
| 27 | |
| 28 | class MyWindow(QMainWindow, Ui_Form): |
| 29 | def __init__(self, parent=None): |
| 30 | super(MyWindow, self).__init__(parent) |
| 31 | self.setupUi(self) |
| 32 | x = np.linspace(-100, 100, 1000) |
| 33 | data = np.sin(x) / x |
| 34 | self.graphicsView.plot(data, pen=(255, 255, 255, 200)) |
| 35 | self.label = pg.TextItem(text="横坐标：{}".format(0)) |
| 36 | self.graphicsView.addItem(self.label) |
| 37 | self.setMouseTracking(True) |
| 38 | self.graphicsView.scene().sigMouseMoved.connect(self.onMouseMoved) |
| 39 | |
| 40 | def onMouseMoved(self, evt): |
| 41 | if self.graphicsView.plotItem.vb.mapSceneToView(evt): |
| 42 | point = self.graphicsView.plotItem.vb.mapSceneToView(evt) |
| 43 | self.label.setHtml("<p style='color:white'>横坐标：{0}</p>".format(point.x())) |
| 44 | |
| 45 | |
| 46 | if __name__ == '__main__': |