AS3: Graphics.lineStyle () - Change only ALPHA?

Question

In the method, Graphics.lineStyle()you pass alpha as the third parameter. I do not want to change the thickness or color, which are the first two parameters, so that I can just change the alpha? or at least “get” thickness and color so that I can repeat them so they don't change?

Thank!!

Answer 1

One option is to wrap the graphics object that you are going through and add getters and setters for individual properties that are otherwise only available as parameters.

Pseudo Code:

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 );
    }
}