在方法Graphics.lineStyle()
中,您将alpha作为第三个参数传递。我不想改变前两个参数的厚度或颜色,所以我有没有办法改变alpha?或至少“获得”厚度和颜色,以便我可以重新通过它们,以便它们不会改变?
谢谢!
答案 0 :(得分:2)
一个选项是包装您传递的图形对象,并为单个属性添加getter和setter,否则这些属性仅作为参数提供。
的伪代码:
public class CustomGraphics
{
// -- here is the wrapped graphics object
protected var _graphics:Graphics;
// -- unique properties for line style
protected var _lineColor:uint;
protected var _lineThickness:int;
protected var _lineAlpha:Number;
public function CustomGraphics( gfx:Graphics )
{
_graphics = gfx;
_lineColor = 0;
_lineThickness = 1;
_lineAlpha = 1;
draw();
}
public function set lineAlpha( value:Number ):void
{
if( _lineAlpha != value ) {
_lineAlpha = value;
// -- insert code to redraw or invalidate here
draw();
}
}
public function draw():void {
_graphics.setLineStyle( _lineThickness, _lineColor, _lineAlpha );
}
}