在 Matplotlib 中，鼠标右键移动画布的功能通常是通过设置交互模式来实现的，例如使用 mpl_connect 方法。以下是一个示例代码，展示如何在 Matplotlib 中使用 mpl_connect 方法来实现鼠标右键移动画布的功能：
import numpy as np
import matplotlib.pyplot as plt
import matplotlibmatplotlib.use('TkAgg')class PanCanvas:def __init__(self, ax):self.ax = axself.press = Noneself.x0 = Noneself.y0 = Noneself.ax.figure.canvas.mpl_connect('button_press_event', self.on_press)self.ax.figure.canvas.mpl_connect('button_release_event', self.on_release)self.ax.figure.canvas.mpl_connect('motion_notify_event', self.on_motion)def on_press(self, event):if event.button == 3: # Right mouse buttonself.press = event.xdata, event.ydataself.x0 = self.ax.get_xlim()self.y0 = self.ax.get_ylim()def on_release(self, event):if self.press is not None:self.press = Noneself.ax.figure.canvas.draw()def on_motion(self, event):if self.press is None:returnif event.button == 3: # Right mouse buttonx_press, y_press = self.pressdx = event.xdata - x_pressdy = event.ydata - y_pressself.ax.set_xlim(self.x0[0] - dx, self.x0[1] - dx)self.ax.set_ylim(self.y0[0] - dy, self.y0[1] - dy)self.ax.figure.canvas.draw()def main():# 创建一个绘图窗口和一个子图fig, ax = plt.subplots()ax.set_xlim(0, 10)ax.set_ylim(0, 10)# 绘制一些示例数据x = np.linspace(0, 10, 100)y = np.sin(x)line, = ax.plot(x, y)# 创建 PanCanvas 对象pan_canvas = PanCanvas(ax)plt.show()if __name__ == "__main__":main()
)
