如何繪製flex中的虛線

Question

經過一些搜索並閱讀Graphics類文檔後，找不到指定線條線條樣式的方法。我的意思是這條線是堅固的還是點綴的。有人能幫助我嗎？

謝謝！

Answer 1

那麼有在柔性無虛線或點線。

但是，您可以創建自己的線條或邊框： http://cookbooks.adobe.com/post_Creating_a_dashed_line_custom_border_with_dash_and-13286.html

嘗試和享受！

Answer 2

無論如何，你不能，不僅僅是通過使用Flex庫類。當然，你可以自己做。下面是實現它的類（從代碼修改發現here，感謝肯·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; 
} 

而且你可以用它喜歡：

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

我跑過這個，今天，我很喜歡。提供虛線/虛線和其他一些東西（主要是曲線）。

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

Answer 4

我做到這一點很簡單：

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：:)用同樣的方法在羅斯提供的鏈接。

Answer 5

我寫了一些簡單的代碼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; 
      } 


     } 
    } 

} 

然後使用它像這樣 -

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