色に透明度を指定する
透明度を指定した色で円を塗りつぶす。コードは下の通り。
import math import clr clr.AddReference("System.Windows.Forms") clr.AddReference("System.Drawing") from System.Windows.Forms import Application, Form from System.Drawing import Size, Color, SolidBrush class IForm(Form): def __init__(self): self.Text = 'Circles' xc = 140 yc = 130 r = 80.0 self.coords = list() for i in range(18): x = xc + r*math.cos(math.pi/180.0*20*i) y = yc + r*math.sin(math.pi/180.0*20*i) xy = [x, y] self.coords.append(xy) self.Paint += self.OnPaint self.CenterToScreen() def OnPaint(self, event): g = event.Graphics for i in range(len(self.coords)): xs = self.coords[i][0] ys = self.coords[i][1] color = Color.FromArgb(255/len(self.coords)*i, 0, 0, 255) brush = SolidBrush(color) g.FillEllipse(brush, xs, ys, 15, 15) g.Dispose() Application.Run(IForm())