piechartplotarea.lzx

<!---
    @access public
    @topic Components
    @subtopic Charts
  -->
<library>
    <include href="../styles/strokestyle.lzx"/>
    <include href="../common/viewspoolmanager.lzx"/>
    <include href="extensions/drawview.lzx"/>
    
       <!---
         A pie chart plot area where the pie slices are rendered
         @access public
         -->
        <class name="piechartplotarea" extends="drawview">
        <doc>
          <text>
            <warning>This component is of Beta quality and is subject to change.</warning>
          </text>
        </doc>
        <!--- Array that holds the attributes regarding the dimension and position
              of the pie slices
              TODO::Change type - html
              @keywords private -->
        <attribute name="arrPiePieces" type="html" value="null"/>
        <!--- Defines the pie slice's style -->
        <attribute name="style" type="string" value="null"/>
    
        <!--- Piece pool 
              @keywords private -->
    <viewspool name="_piepiecespool" parentview="${parent}" viewclass="piepiece"/>
        <!--- Stroke style object, used to define the pie slice's border
              @keywords private -->
        <strokestyle name="objStroke"/>

        <!--- @keywords private -->
        <method name="init">
            super.init();
            this.arrPiePieces = new Array(0);
        </method>

        <!--- @keywords private -->
        <method name="searchStrokeStyle"> 
        
            var lStrokeObj = null;

           for (var i=0; i < parent.subnodes.length; i++) {
                if (parent.subnodes[i].name == this.style) {
                    lStrokeObj =  parent.subnodes[i];
                }
           }
           //Checks if any Stroke style is defined.
           if (lStrokeObj != null) {
               this.objStroke.setAttribute('strokeColor', lStrokeObj.strokeColor)
               this.objStroke.setAttribute('strokeType', lStrokeObj.strokeType)
               this.objStroke.setAttribute('strokeWidth', lStrokeObj.strokeWidth)
           }
          
         </method>

        <!--- Renders the pie slices -->
        <method name="renderSeries" args="xseries, yseries, tooltipseries, strokeStyle">
         
            _piepiecespool.reclaimAll();
        
            searchStrokeStyle();
            var radius = Math.min(this.width, this.height) / 2.3;   
            var colors = [0x00FF00, 0xC5276F, 0xB71CB3, 0xF2F200, 0xE46A18];
            var lowColors = [0x80FF80, 0xFF3399, 0xFF75FF, 0xFFFF84, 0xF98B39]; 
            //args="x, y, startAngle, arc, radius, yRadius">
            var sum = this.calcSum(yseries);
            var angle = 0;

            this.arrPiePieces = new Array(0);
            
            if(xseries != null){
                for(var i = 0; i < xseries.length; i++)
                {   
                    var arc = yseries[i] / sum * 360;   
                    
                    var lx = this.width/2;
                    var ly = this.height/2;
    
                    var v = _piepiecespool.getView({x : lx, y : ly, width: 0, height : 0});
                    v.clear();
                    
                    //v.tooltip = tooltipseries[i];
                    
                    v.setAttribute( "x", lx );
                    v.setAttribute( "y", ly );
                    v.setAttribute( "angle", angle );
                    v.setAttribute( "arcvalue", arc );
                    v.setAttribute( "radius", radius );
                      
                    v.setAttribute( "style", parent.style.getDataStyle(i));
    
                    this.arrPiePieces.push(v);
                    v.renderWedge();
    
                    if(tooltipseries != null)
                    {
                        v.tooltip = tooltipseries[i];
                    }
                    angle += arc;
                }
            }
        
        </method>
        
        <!--- Calculates the sum of the all the values of the categories
              @keywords private -->
        <method name="calcSum" args="arr">
        
            var sum = 0;
            if(arr != null){
                for(var i = 0; i < arr.length; i++)
                {
                    sum += arr[i];
                }
            }
            return sum;
                    
        </method>

        <!--- Clears the array with the attributes of the pie slices
              @keywords private -->
        <method name="clear">
        
            if( this.arrPiePieces != null )
                while( this.arrPiePieces.length > 0 )
                    this.arrPiePieces.pop();

            this.arrPiePieces = null;
        
        </method>
    </class>     
</library>
<!-- * X_LZ_COPYRIGHT_BEGIN 
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* Copyright 2001-2008 Laszlo Systems, Inc.  All Rights Reserved.              
* Use is subject to license terms.                                            
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<!-- @LZX_VERSION@                                                       
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