////////////////////////////////////////////////////////////////////////////////
//
//  Licensed to the Apache Software Foundation (ASF) under one or more
//  contributor license agreements.  See the NOTICE file distributed with
//  this work for additional information regarding copyright ownership.
//  The ASF licenses this file to You under the Apache License, Version 2.0
//  (the "License"); you may not use this file except in compliance with
//  the License.  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////


package mx.skins.spark
{
    
    import flash.display.Graphics;
    import mx.skins.ProgrammaticSkin;
    
    /**
     *  The skin for the sort arrow in a column header in an MX DataGrid.
     *  
     *  @see mx.controls.DataGrid
     *  
     *  @langversion 3.0
     *  @playerversion Flash 9
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public class DataGridSortArrow extends ProgrammaticSkin
    {
        
        //--------------------------------------------------------------------------
        //
        //  Constructor
        //
        //--------------------------------------------------------------------------
        
        /**
         *  Constructor.
         *  
         *  @langversion 3.0
         *  @playerversion Flash 9
         *  @playerversion AIR 1.5
         *  @productversion Flex 4
         */
        public function DataGridSortArrow()
        {
            super();
        }
        
        //--------------------------------------------------------------------------
        //
        //  Overridden properties
        //
        //--------------------------------------------------------------------------
        
        //----------------------------------
        //  measuredWidth
        //----------------------------------
        
        /**
         *  @private
         */
        override public function get measuredWidth():Number
        {
            return 6;
        }
        
        //----------------------------------
        //  measuredHeight
        //----------------------------------
        
        /**
         *  @private
         */
        override public function get measuredHeight():Number
        {
            return 6;
        }
        
        //--------------------------------------------------------------------------
        //
        //  Overridden methods
        //
        //--------------------------------------------------------------------------
        
        /**
         *  @private
         */
        override protected function updateDisplayList(w:Number, h:Number):void
        {
            super.updateDisplayList(w, h);
            
            var g:Graphics = graphics;
            var alpha:Number = name == "sortArrowDisabled" ? 0.5 : 1;
            
            g.clear();
            g.beginFill(getStyle("symbolColor"), alpha);
            g.moveTo(0,0);
            g.lineTo(w, 0);
            g.lineTo(w / 2, h);
            g.lineTo(0,0);
            g.endFill();
        }
    }
    
}