如何绘制flex中的虚线

Question

经过一些搜索并阅读Graphics类文档后，找不到指定线条线条样式的方法。我的意思是这条线是坚固的还是点缀的。有人能帮助我吗？

谢谢！

Answer 1

那么有在柔性无虚线或点线。

但是，您可以创建自己的线条或边框： http://cookbooks.adobe.com/post_Creating_a_dashed_line_custom_border_with_dash_and-13286.html

尝试和享受！

Answer 2

无论如何，你不能，不仅仅是通过使用Flex库类。当然，你可以自己做。下面是实现它的类（从代码修改发现here，感谢肯·福克斯）：

/*Copyright (c) 2006 Adobe Systems Incorporated 

Permission is hereby granted, free of charge, to any person 
obtaining a copy of this software and associated documentation 
files (the "Software"), to deal in the Software without 
restriction, including without limitation the rights to use, 
copy, modify, merge, publish, distribute, sublicense, and/or sell 
copies of the Software, and to permit persons to whom the 
Software is furnished to do so, subject to the following 
conditions: 

The above copyright notice and this permission notice shall be 
included in all copies or substantial portions of the Software. 

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
OTHER DEALINGS IN THE SOFTWARE. 
*/ 
package com.some.package { 
    import mx.graphics.IStroke; 
    import flash.display.Graphics; 

    public class GraphicsUtils { 
    public static function _drawDashedLine(target:Graphics, strokes:Array, pattern:Array, 
              drawingState:DashStruct, 
              x0:Number, y0:Number, x1:Number, y1:Number):void { 
     var dX:Number = x1 - x0; 
     var dY:Number = y1 - y0; 
     var len:Number = Math.sqrt(dX * dX + dY * dY); 
     dX /= len; 
     dY /= len; 
     var tMax:Number = len; 
     var t:Number = -drawingState.offset; 
     var patternIndex:int = drawingState.patternIndex; 
     var strokeIndex:int = drawingState.strokeIndex; 
     var styleInited:Boolean = drawingState.styleInited; 

     while(t < tMax) { 
     t += pattern[patternIndex]; 
     if(t < 0) { 
      var x:int = 5; 
     } 

     if(t >= tMax) { 
      drawingState.offset = pattern[patternIndex] - (t - tMax); 
      drawingState.patternIndex = patternIndex; 
      drawingState.strokeIndex = strokeIndex; 
      drawingState.styleInited = true; 
      t = tMax; 
     } 

     if(styleInited == false) { 
      (strokes[strokeIndex] as IStroke).apply(target); 
     } 
     else { 
      styleInited = false; 
     } 

     target.lineTo(x0 + t * dX, y0 + t * dY); 

     patternIndex = (patternIndex + 1) % pattern.length; 
     strokeIndex = (strokeIndex + 1) % strokes.length; 
     } 
    } 

    public static function drawDashedLine(target:Graphics, strokes:Array, pattern:Array, 
              x0:Number, y0:Number, x1:Number, y1:Number):void { 
     target.moveTo(x0, y0); 
     var struct:DashStruct = new DashStruct(); 
     _drawDashedLine(target, strokes, pattern, struct, x0, y0, x1, y1); 
    } 

    public static function drawDashedPolyLine(target:Graphics, strokes:Array, pattern:Array, 
               points:Array):void { 
     if(points.length == 0) { return; } 
     var prev:Object = points[0]; 
     var struct:DashStruct = new DashStruct(); 

     target.moveTo(prev.x, prev.y); 

     for(var i:int = 1; i < points.length; i++) { 
     var current:Object = points[i]; 
     _drawDashedLine(target, strokes, pattern, struct, 
         prev.x, prev.y, current.x, current.y); 
     prev = current; 
     } 
    } 
    } 
} 

class DashStruct { 
    public function init():void { 
    patternIndex = 0; 
    strokeIndex = 0; 
    offset = 0; 
    } 
    public var patternIndex:int = 0; 
    public var strokeIndex:int = 0; 
    public var offset:Number = 0; 
    public var styleInited:Boolean = false; 
} 

而且你可以用它喜欢：

var points:Array = []; 
points.push({ x: 0, y: 0 }); 
points.push({ x: this.width, y: 0 }); 
points.push({ x: this.width, y: this.height }); 
points.push({ x: 0, y: this.height }); 
points.push({ x: 0, y: 0 }); 

var strokes:Array = []; 
var transparentStroke:Stroke = new Stroke(0x0, 0, 0); 
strokes.push(new Stroke(0x999999, 2, 1, false, 'normal', CapsStyle.NONE)); 
strokes.push(transparentStroke); 
strokes.push(new Stroke(0x222222, 2, 1, false, 'normal', CapsStyle.NONE)); 
strokes.push(transparentStroke); 

GraphicsUtils.drawDashedPolyLine(this.graphics, strokes, [ 16, 5, 16, 5 ], points); 

Answer 3

我跑过这个，今天，我很喜欢。提供虚线/虚线和其他一些东西（主要是曲线）。

http://flexdevtips.blogspot.com/2010/01/drawing-dashed-lines-and-cubic-curves.html

Answer 4

我做到这一点很简单：

public static function drawDottedLine(target:Graphics, xFrom:Number, yFrom:Number, xTo:Number, yTo:Number, dotLenth:Number = 10):void{ 
    var isGap:Boolean; 
    target.moveTo(xFrom, yFrom); 
    xFrom += dotLenth; 
    for(xFrom; xFrom < xTo; xFrom += dotLenth){ 
     if(isGap){ 
      target.moveTo(xFrom, yFrom); 
     } else { 
      target.lineTo(xFrom, yFrom); 
     } 
     isGap = !isGap; 
    } 
} 

UPD：:)用同样的方法在罗斯提供的链接。

Answer 5

我写了一些简单的代码DashedLine -

import flash.display.Graphics; 

import spark.primitives.Line; 

public class DashedLine extends Line 
{ 


    public var dashLength:Number = 10; 

    override protected function draw(g:Graphics):void 
    { 
     // Our bounding box is (x1, y1, x2, y2) 
     var x1:Number = measuredX + drawX; 
     var y1:Number = measuredY + drawY; 
     var x2:Number = measuredX + drawX + width; 
     var y2:Number = measuredY + drawY + height;  

     var isGap:Boolean; 

     // Which way should we draw the line? 
     if ((xFrom <= xTo) == (yFrom <= yTo)) 
     { 
      // top-left to bottom-right 
      g.moveTo(x1, y1); 

      x1 += dashLength; 
      for(x1; x1 < x2; x1 += dashLength){ 
       if(isGap){ 
        g.moveTo(x1, y1); 
       } else { 
        g.lineTo(x1, y1); 
       } 
       isGap = !isGap; 
      } 
     } 
     else 
     { 
      // bottom-left to top-right 
      g.moveTo(x1, y2); 


      x1 += dashLength; 
      for(x1; x1 < x2; y2 += dashLength){ 
       if(isGap){ 
        g.moveTo(x1, y2); 
       } else { 
        g.lineTo(x1, y2); 
       } 
       isGap = !isGap; 
      } 


     } 
    } 

} 

然后使用它像这样 -

<comps:DashedLine top="{}" left="0" width="110%" > 
    <comps:stroke> 
     <s:SolidColorStroke color="0xff0000" weight="1"/> 
    </comps:stroke> 
</comps:DashedLine>