Silverlight 引路蜂二维图形库示例:颜色

引路蜂二维图形库中的颜色值是个32位整数，采用0xAARRGGBB格式。Alpha通道指定了颜色的透明度，0×00表示全透明，0xFF表示完全不透明。

下面的代码显示了如何创建不透明和半透明的颜色。

private void Colors() { /** * The solid (full opaque) red color in the ARGB space */ Color redColor = new Color(0xffff0000, false); /** * The semi-opaque green color in the ARGB space (alpha is 0x78) */ Color greenColor = new Color(0x7800ff00, true); /** * The semi-opaque blue color in the ARGB space (alpha is 0x78) */ Color blueColor = new Color(0x780000ff, true); /** * The semi-opaque yellow color in the ARGB space ( alpha is 0x78) */ Color yellowColor = new Color(0x78ffff00, true); /** * The dash array */ int[] dashArray = { 20, 8 }; graphics2D.Reset(); graphics2D.Clear(Color.Black); SolidBrush brush = new SolidBrush(redColor); graphics2D.FillOval(brush, 30, 60, 80, 80); brush = new SolidBrush(greenColor); graphics2D.FillOval(brush, 60, 30, 80, 80); Pen pen = new Pen(yellowColor, 10, Pen.CapButt, Pen.JoinMiter, dashArray, 0); brush = new SolidBrush(blueColor); graphics2D.SetPenAndBrush(pen, brush); graphics2D.FillOval(null, 90, 60, 80, 80); graphics2D.DrawOval(null, 90, 60, 80, 80); }