WX光标演示

例如，绘制光标并报告WX中的数据坐标。

  1. from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
  2. from matplotlib.backends.backend_wx import NavigationToolbar2Wx
  3. from matplotlib.figure import Figure
  4. import numpy as np
  6. import wx
  9. class CanvasFrame(wx.Frame):
  10.     def __init__(self, ):
  11.         wx.Frame.__init__(self, None, -1, 'CanvasFrame', size=(550, 350))
  13.         self.figure = Figure()
  14.         self.axes = self.figure.add_subplot(111)
  15.         t = np.arange(0.0, 3.0, 0.01)
  16.         s = np.sin(2*np.pi*t)
  18.         self.axes.plot(t, s)
  19.         self.axes.set_xlabel('t')
  20.         self.axes.set_ylabel('sin(t)')
  21.         self.figure_canvas = FigureCanvas(self, -1, self.figure)
  23.         # Note that event is a MplEvent
  24.         self.figure_canvas.mpl_connect(
  25.             'motion_notify_event', self.UpdateStatusBar)
  26.         self.figure_canvas.Bind(wx.EVT_ENTER_WINDOW, self.ChangeCursor)
  28.         self.sizer = wx.BoxSizer(wx.VERTICAL)
  29.         self.sizer.Add(self.figure_canvas, 1, wx.LEFT | wx.TOP | wx.GROW)
  30.         self.SetSizer(self.sizer)
  31.         self.Fit()
  33.         self.statusBar = wx.StatusBar(self, -1)
  34.         self.SetStatusBar(self.statusBar)
  36.         self.toolbar = NavigationToolbar2Wx(self.figure_canvas)
  37.         self.sizer.Add(self.toolbar, 0, wx.LEFT | wx.EXPAND)
  38.         self.toolbar.Show()
  40.     def ChangeCursor(self, event):
  41.         self.figure_canvas.SetCursor(wx.Cursor(wx.CURSOR_BULLSEYE))
  43.     def UpdateStatusBar(self, event):
  44.         if event.inaxes:
  45.             self.statusBar.SetStatusText(
  46.                 "x={}  y={}".format(event.xdata, event.ydata))
  49. class App(wx.App):
  50.     def OnInit(self):
  51.         'Create the main window and insert the custom frame'
  52.         frame = CanvasFrame()
  53.         self.SetTopWindow(frame)
  54.         frame.Show(True)
  55.         return True
  57. if __name__ == '__main__':
  58.     app = App(0)
  59.     app.MainLoop()

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