plotwindow.py 文件源码

def draw_coord(self, dc, w, h, l, t, r, b):
        xs = [5, 10, 20, 40, 50, 100, 200, 400, 500, 1000, 2000, 4000, 10000]
        n, dx, dy = len(self.data), 0, 0
        left, low, right, high = self.extent
        for i in xs[::-1]: 
            if (right-left)*1.0/i<=10:dx=i
        for i in xs[::-1]: 
            if (high-low)*1.0/i<=10:dy=i
        dc.SetPen(wx.Pen((0, 0, 0), width=1, style=wx.SOLID))
        dc.DrawRectangle(l, t, w+1, h+1)
        dc.SetPen(wx.Pen((100, 100, 100), width=1, style=wx.SOLID))
        for i in range(int(ceil(left*1.0/dx)*dx), int(right)+1, dx):
            x = l+(i-left)*1.0/(right-left)*w
            dc.DrawLine(x, t, x, t+h)
            dc.DrawText(str(i), x-5, t+h)
        for i in range(int(ceil(low*1.0/dy)*dy), int(high)+1, dy):
            y = h+t-(i-low)*1.0/(high-low)*h
            dc.DrawLine(l, y, l+w, y)
            dc.DrawText(str(i), 5, y-5)

        titlefont = wx.Font(18, wx.FONTFAMILY_DEFAULT, 
                       wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL, False)
        dc.SetFont(titlefont)
        dw,dh = dc.GetTextExtent(self.title)
        dc.DrawText(self.title, l+w/2-dw/2, 3)

        lablelfont = wx.Font(14, wx.FONTFAMILY_DEFAULT, 
                       wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL, False)
        dc.SetFont(lablelfont)
        dw,dh = dc.GetTextExtent(self.labelx)
        dc.DrawText(self.labelx, l+w-dw, t+h+15)
        dc.DrawText(self.labely, 5, 10)