source: code/Website/open-flash-chart/elements/axis/RadarSpokeLabels.as

package elements.axis {
        import flash.text.TextField;
        import flash.display.Sprite;
        import flash.text.TextFormat;
        import string.Utils;
        import flash.geom.Point;
        
        public class RadarSpokeLabels extends Sprite{

                private var style:Object;
                public var labels:Array;
                
                
                public function RadarSpokeLabels( json:Object ) {
                        
                        // default values
                        this.style = {
                                colour:                 '#784016'
                        };
                        
                        if( json != null )
                                object_helper.merge_2( json, this.style );
                                
                        // tr.ace_json(this.style);
                                
                        this.style.colour = Utils.get_colour( this.style.colour );
                        
                        // cache the text for tooltips
                        this.labels = new Array();
                        var values:Array;
                        var ok:Boolean = false;
                        
                        if( ( this.style.labels is Array ) && ( this.style.labels.length > 0 ) )
                        {
                                
                                for each( var s:Object in this.style.labels )
                                        this.add( s, this.style );
                        }
                        
                }

                public function add( label:Object, style:Object ) : void
                {
                        var label_style:Object = {
                                colour:         style.colour,
                                text:           '',
                                size:       11
                        };

                        if( label is String )
                                label_style.text = label as String;
                        else {
                                object_helper.merge_2( label, label_style );
                        }

                        // our parent colour is a number, but
                        // we may have our own colour:
                        if( label_style.colour is String )
                                label_style.colour = Utils.get_colour( label_style.colour );

                        this.labels.push( label_style.text );

                        var l:TextField = this.make_label( label_style );
                        this.addChild( l );
                }
                
                public function make_label( label_style:Object ):TextField {
                        
                        // we create the text in its own movie clip
                        
                        var tf:TextField = new TextField();
            tf.x = 0;
                        tf.y = 0;
                        
                        var tmp:Array = label_style.text.split( '<br>' );
                        var text:String = tmp.join('\n');
                        
                        tf.text = text;
                        
                        var fmt:TextFormat = new TextFormat();
                        fmt.color = label_style.colour;
                        fmt.font = "Verdana";
                        fmt.size = label_style.size;
                        fmt.align = "right";
                        
                        tf.setTextFormat(fmt);
                        tf.autoSize = "left";
                        tf.visible = true;
                        
                        return tf;
                }
                
                // move y axis labels to the correct x pos
                public function resize( sc:ScreenCoordsRadar ):void {

                        var tf:TextField;
                        //
                        // loop over the lables and make sure they are on the screen,
                        // reduce the radius until they fit
                        //
                        var i:Number = 0;
                        var outside:Boolean;
                        do
                        {
                                outside = false;
                                this.resize_2( sc );
                                
                                for ( i = 0; i < this.numChildren; i++ )
                                {
                                        tf = this.getChildAt(i) as TextField;
                                        if( (tf.x < sc.left) ||
                                                (tf.y < sc.top) ||
                                                (tf.y + tf.height > sc.bottom ) ||
                                                (tf.x + tf.width > sc.right)
                                        )
                                                outside = true;
                                
                                }
                                sc.reduce_radius();
                        }
                        while ( outside && sc.get_radius() > 10 );
                        //
                        //
                        //
                }
                
                private function resize_2( sc:ScreenCoordsRadar ):void {
                        
                        var i:Number;
                        var tf:TextField;
                        var mid_x:Number = sc.get_center_x();
                        
                        // now move it to the correct Y, vertical center align
                        for ( i = 0; i < this.numChildren; i++ ) {
                                
                                tf = this.getChildAt(i) as TextField;

                                var p:flash.geom.Point = sc.get_get_x_from_pos_and_y_from_val( i, sc.get_max() );
                                if ( p.x > mid_x )
                                        tf.x = p.x;                                     // <-- right align the text
                                else
                                        tf.x = p.x - tf.width;          // <-- left align the text
                                
                                if ( i == 0 ) {
                                        //
                                        // this is the top label and will overwrite
                                        // the radius label -- so we right align it
                                        // because the radius labels are left aligned
                                        //
                                        tf.y = p.y - tf.height;
                                        tf.x = p.x;
                                }
                                else
                                        tf.y = p.y;
                        }
                }
                
                public function die(): void {
                        
                        this.style = null;
                        this.labels = null;
                        
                        this.graphics.clear();
                        while ( this.numChildren > 0 )
                                this.removeChildAt(0);
                }
        }
}