import_OpenGL_cube_and_cone.py 文件源码

def OnPaint(self, event):
        dc = wx.PaintDC(self)
        self.SetCurrent(self.context)       # <== this was missing when I wrote the book in 2015...
        if not self.init:
            self.InitGL()
            self.init = True
        self.OnDraw()