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

package elements.axis {
        import flash.display.Sprite;
        import flash.geom.Point;
        import string.Utils;
        
        
        public class RadarAxis extends Sprite {
                
                private var style:Object;
                private var TO_RADIANS:Number = Math.PI / 180;
                
                private var colour:Number;
                private var grid_colour:Number;
                private var labels:RadarAxisLabels;
                private var spoke_labels:RadarSpokeLabels;
                
                function RadarAxis( json:Object )
                {
                        // default values
                        this.style = {
                                stroke:                 2,
                                colour:                 '#784016',
                                'grid-colour':  '#F5E1AA',
                                min:                    0,
                                max:                    null,
                                steps:                  1
                        };
                        
                        if( json != null )
                                object_helper.merge_2( json, this.style );
                                
                        this.colour = Utils.get_colour( this.style.colour );
                        this.grid_colour = Utils.get_colour( this.style['grid-colour'] );
                        
                        this.labels = new RadarAxisLabels( json.labels );
                        this.addChild( this.labels );
                        
                        this.spoke_labels = new RadarSpokeLabels( json['spoke-labels'] );
                        this.addChild( this.spoke_labels );
                }
                
                //
                // how many items in the X axis?
                //
                public function get_range():Range {
                        return new Range( this.style.min, this.style.max, this.style.steps, false );
                }
                
                public function resize( sc:ScreenCoordsRadar ):void
                {
                        this.x = 0;
                        this.y = 0;
                        this.graphics.clear();
                        
                        // this is going to change the radius
                        this.spoke_labels.resize( sc );
                        
                        var count:Number = sc.get_angles();
                        
                        // draw the grid behind the axis
                        this.draw_grid( sc, count );
                        this.draw_axis( sc, count );
                        
                        this.labels.resize( sc );
                }
                
                private function draw_axis( sc:ScreenCoordsRadar, count:Number ): void {
                        
                        this.graphics.lineStyle(this.style.stroke, this.colour, 1, true);
                        
                        for ( var i:Number = 0; i < count; i++ ) {

                                //
                                // assume 0 is MIN
                                //
                                var p:flash.geom.Point = sc.get_get_x_from_pos_and_y_from_val( i, 0 );
                                this.graphics.moveTo( p.x, p.y );
                                
                                var q:flash.geom.Point = sc.get_get_x_from_pos_and_y_from_val( i, sc.get_max() );
                                this.graphics.lineTo( q.x, q.y );
                        }
                }
                
                private function draw_grid( sc:ScreenCoordsRadar, count:Number ):void {
                
                        this.graphics.lineStyle(1, this.grid_colour, 1, true);
                        
                        // floating point addition error:
                        var max:Number = sc.get_max() + 0.00001;
                        
                        var r_step:Number = this.style.steps;
                        var p:flash.geom.Point;
                        
                        //
                        // start in the middle and move out drawing the grid,
                        // don't draw at 0
                        //
                        for ( var r_pos:Number = r_step; r_pos <= max; r_pos+=r_step ) {
                                
                                p = sc.get_get_x_from_pos_and_y_from_val( 0, r_pos );
                                this.graphics.moveTo( p.x, p.y );
                                
                                // draw from each spoke
                                for ( var i:Number = 1; i < (count+1); i++ ) {
                                        
                                        p = sc.get_get_x_from_pos_and_y_from_val( i, r_pos );
                                        this.graphics.lineTo( p.x, p.y );
                                }
                        }
                }
                
                public function die(): void {
                        
                        this.style = null;
                        this.labels.die();
                        this.spoke_labels.die();
                
                        this.graphics.clear();
                        while ( this.numChildren > 0 )
                                this.removeChildAt(0);
                }
        }
}