source: code/Website/open-flash-chart/charts/series/pies/PieLabel.as

package charts.series.pies {
        
        import string.Utils;
        import charts.series.has_tooltip;
        import flash.text.TextField;
        import flash.text.TextFormat;
        
        public class PieLabel extends TextField implements has_tooltip{
                public var is_over:Boolean;
                private static var TO_RADIANS:Number = Math.PI / 180;
                
                public function PieLabel( style:Object )
                {
                        
                        this.text = style.label;
                        // legend_tf._rotation = 3.6*value.bar_bottom;
                        
                        var fmt:TextFormat = new TextFormat();
                        fmt.color = string.Utils.get_colour( style.colour );
                        fmt.font = "Verdana";
                        fmt.size = style['font-size'];
                        fmt.align = "center";
                        this.setTextFormat(fmt);
                        this.autoSize = "left";
                        
                        this.mouseEnabled = false;
                }
                
                public function move_label( rad:Number, x:Number, y:Number, ang:Number ):Boolean {
                        
                        //text field position
                        var legend_x:Number = x+rad*Math.cos((ang)*TO_RADIANS);
                        var legend_y:Number = y+rad*Math.sin((ang)*TO_RADIANS);
                        
                        //if legend stands to the right side of the pie
                        if(legend_x<x)
                                legend_x -= this.width;
                                        
                        //if legend stands on upper half of the pie
                        if(legend_y<y)
                                legend_y -= this.height;
                        
                        this.x = legend_x;
                        this.y = legend_y;
                        
                        // does the label fit onto the stage?
                        if( (this.x > 0) &&
                            (this.y > 0) &&
                                (this.y + this.height < this.stage.stageHeight ) &&
                                (this.x+this.width<this.stage.stageWidth) )
                                return true;
                        else
                                return false;
                }
                
                public function get_tooltip():String {
                        tr.ace(( this.parent as has_tooltip ).get_tooltip());
                        return ( this.parent as has_tooltip ).get_tooltip();
                }
                
                public function get_tip_pos():Object {
                        return ( this.parent as has_tooltip ).get_tip_pos();
                }
                
                public function set_tip( b:Boolean ):void {
                        return ( this.parent as has_tooltip ).set_tip(b);
                }
                
                public function resize( sc:ScreenCoords ): void {
                        
                }
        }
}