////////////////////////////////////////////////////////////////////////////////
//
//  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 flashx.textLayout.events
{
    
    import flash.events.Event;
    
    /**
     *  Represents events that are dispatched when the TextFlow does automatic scrolling.
     *
     *  @langversion 3.0
     *  @playerversion Flash 9
     *  @playerversion AIR 1.1
     */
    public class ScrollEvent extends TextLayoutEvent
    {
        //--------------------------------------------------------------------------
        //
        // Constructor
        //
        //--------------------------------------------------------------------------
        
        /**
         *  Constructor.
         * 
         *  Scroll events are dispatched when a container has scrolled. 
         *
         *  @param type The event type; indicates the action that caused the event.
         *
         *  @param bubbles Specifies whether the event can bubble
         *  up the display list hierarchy.
         *
         *  @param cancelable Specifies whether the behavior associated with the event
         *  can be prevented.
         *
         *
         *  @param delta The change in scroll position, expressed in pixels.
         *  
         */
        public function ScrollEvent(type:String, bubbles:Boolean = false,
                                    cancelable:Boolean = false,
                                    direction:String = null, delta:Number = NaN)
        {
            super(type, bubbles, cancelable);
            
            this.direction = direction;
            this.delta = delta;
        }
        
        //--------------------------------------------------------------------------
        //
        //  Properties
        //
        //--------------------------------------------------------------------------
        
        //----------------------------------
        //  delta
        //----------------------------------
        
        /**
         *  The change in the scroll position value that resulted from 
         *  the scroll. The value is expressed in pixels. A positive value indicates the 
         *  scroll was down or to the right. A negative value indicates the scroll  
         *  was up or to the left.
         *  
         *  @langversion 3.0
         *  @playerversion Flash 9
         *  @playerversion AIR 1.1
         */
        public var delta:Number;
        
        //----------------------------------
        //  direction
        //----------------------------------
        
        /**
         *  The direction of motion.
         *  The possible values are <code>ScrollEventDirection.VERTICAL</code>
         *  or <code>ScrollEventDirection.HORIZONTAL</code>.
         *
         *  @see flashx.textLayout.events.ScrollEventDirection
         *  
         *  @langversion 3.0
         *  @playerversion Flash 9
         *  @playerversion AIR 1.1
         */
        public var direction:String;
        
        //--------------------------------------------------------------------------
        //
        //  Overridden methods: Event
        //
        //--------------------------------------------------------------------------
        
        /**
         *  @private
         */
        override public function clone():Event
        {
            return new ScrollEvent(type, bubbles, cancelable, direction, delta);
        }
    }
    
}