verticalaxis.lzx

<!---
    @access public
    @topic Components
    @subtopic Charts
  -->
<library>
    <include href="../styles/strokestyle.lzx"/>
    <include href="../common/label.lzx"/>
    <include href="axis.lzx"/>
<!-- Begin Vertical Axis Class -->
<!--- Represents the Y axis on the rectangular chart, extends from Axis class
     @access public
        -->
    <class name="verticalaxis" extends="axis">
    <!--- @keyword private-->
    <attribute name="datacolumn" type="string" value="y"/>
    <!--- Init
        @keyword private
        -->
    <method name="init">    
            this.setAttribute('width', objStroke.strokeWidth);
            super.init();
    </method>    
    <!--- Render the vertical axis line
        @keyword private 
        -->   
    <method name="renderAxis"> 
         
        this.minimumRender = parent.miny;
        this.maximumRender = parent.maxy;

        objStroke.renderStroke(0, 0, 0, this.height);

    
    </method>
    <!--- Render axis title 
        @keyword private
        -->   
    <method name="renderTitle">
    
     if ( this.titleX == null && this.titleY == null ){
            switch( titleLocation ) {
                case "high":                    
                    this.titleView.setAttribute('x', (this.width + this.style.tickmajor.length)+titleGap);
                    this.titleView.setAttribute('y', (this.height)/2);
                    break;
            
                case "low":
                    this.titleView.setAttribute('x', -(this.width + this.tickMarksView.width)- titleGap - titleView.width);
                    this.titleView.setAttribute('y', (this.height)/2);
                    if ( this.titleView.embeddedFont(style.label.fontname) ){
                        if ( style.label.fontangle > 20 &&  style.label.fontangle < 45)
                            this.titleView.setAttribute('x', this.titleView.x + this.titleView.width/4);
                        else if ( (style.label.fontangle > 45 &&  style.label.fontangle < 90) || (style.label.fontangle > 220 &&  style.label.fontangle <= 270))
                            this.titleView.setAttribute('x', this.titleView.x + this.titleView.width/2);
                        else if ( style.label.fontangle >= 90 &&  style.label.fontangle < 220)
                            this.titleView.setAttribute('x', this.titleView.x + this.titleView.width);
                    }
                    break;
            
                case "default":
                    this.titleView.setAttribute('x', - (this.titleView.width/2));
                    this.titleView.setAttribute('y', - this.titleGap - this.titleView.height);
                    break;
            }
        } else {
            this.titleView.setAttribute('x', this.titleX);
            this.titleView.setAttribute('y', this.titleY);
        }
            
    </method>
    
    <!--- setter for scale and offset 
        @keyword private
    -->   
    <method name="setScaleAndOffset">
                               
        this.scale = this.height / (this.maximum - this.minimum);
        this.offset = - this.minimum * this.scale;    

        //flip y                    
        this.offset = this.height - this.offset;
        this.scale = - this.scale;                                             
        
    </method>
    <!---  Method to return a pixel position given graph data
        @param Number pInput: for linear charts a graphicable data.
        @keyword private
        -->
    <method name="getPixelDistance" args="pInput">
    
        //FIXME : Find out why the current pixel rate is not accurate
        return ((pInput - this.minimumRender) * (this.height/(this.maximumRender - this.minimumRender)));
    
    </method> 
    <!--- Get the length of the axis.
         @keyword private
        -->
    <method name="getAxisLength">
    
        return this.height;
            
    </method>
    <!---  Check label location and change placement to avoid labels
            overlaping
            @keywords private -->
    <method name="reposLabels" args="pMarks"/>
    
    <!---   Render a tick mark
            @param Number pOffset: displacement depending on the position of the tickmark
            @param Number pPos: actual tickmark position along the axis
            @param expression pStyle: tickmark style object to use on the render
            @keywords private -->
    <method name="renderTickMark" args="pOffset,pPos,pStyle"> 
            this.beginPath();
            
            this.moveTo(- pOffset, this.height-pPos);
            this.lineTo(pStyle.length-pOffset , this.height-pPos);
             
            //set color
            this.strokeStyle = pStyle.color;
            this.lineWidth = pStyle.size;
            //complete line
            this.stroke();
        
    </method>
    <!--- Set label position
            @keywords private -->
    <method name="setLabelPos" args="pLabel,pOffset,pTW,pTH,pPos">
    
        pLabel.setAttribute('x', -pOffset-pTW);
        pLabel.setAttribute('y', this.height-pPos-(pTH/2) );

        if ( (pLabel.getTextWidth() + this.style.tickmajor.length) >= this.tickMarksView.width )
            this.tickMarksView.setAttribute('width', this.style.tickmajor.length + pLabel.getTextWidth());

     
    </method>  
    <!--- Render tickmarks 
    @keyword private  -->    
    <method name="renderTick"> 
            if (type.toUpperCase()=='CATEGORICAL') {
                renderCategoricalTick();
            } else if (type.toUpperCase()=='LINEAR') {
                renderLinearTick();
            }
        </method>
    <doc>
      <tag name="shortdesc"><text>
          a vertical axis for a chart
      </text></tag>
      <text>

        <warning>This component is of Beta quality and is subject to change.</warning>
      </text>
    </doc>

    </class>
 </library>
<!-- End Vertical Axis Class -->
<!-- * X_LZ_COPYRIGHT_BEGIN 
***************************************************
* Copyright 2001-2008 Laszlo Systems, Inc.  All Rights Reserved.              
* Use is subject to license terms.                                            
* X_LZ_COPYRIGHT_END 
****************************************************** -->
<!-- @LZX_VERSION@  -->