ColorPickerCircle.java 文件源码

@SuppressLint("DrawAllocation")
@Override
protected void onDraw(Canvas canvas)
{
    super.onDraw(canvas);
    int width  = getMeasuredWidth();
    int height = getMeasuredHeight();

    int new_color = Color.HSVToColor(hsv);
    if(color != new_color)
    {
        Shader shader_x = new LinearGradient(0.0F, 0.0F, width, 0.0F, Color.WHITE, new_color, TileMode.CLAMP);

        ComposeShader shader = new ComposeShader(shader_y, shader_x, PorterDuff.Mode.MULTIPLY);
        paint.setShader(shader);

        color = new_color;
    }
    canvas.drawRect(0.0F, 0.0F, width, height, paint);
}