widgets.py 文件源码

def draw(self):
        if self.hist is None:
            return

        # get client device context buffer
        dc = wx.BufferedDC(wx.ClientDC(self), self.buffer)
        dc.Clear()
        # w, h = self.GetClientSize()

        # the main draw process 
        print("drawing histogram")
        dc.SetPen(wx.Pen((100,100,100), width=1, style=wx.SOLID))        
        for i in range(256):
            dc.DrawLine(i,80,i,80-self.hist[i])            
        dc.SetPen(wx.Pen((0,0,0), width=1, style=wx.SOLID))
        dc.DrawLine(self.x1, 80, self.x2, 0)
        dc.DrawLines([(0,0),(255,0),(255,80),(0,80),(0,0)])