Motor Sport Digital Archive Collection 1960s/Motor Sport Digital Archive Collection 1960s.iso/main.swf/scripts/com/arpitonline/controls/ScrollImage.as

Text File | 2008-05-21 | 6.1 KB | 201 lines

package com.arpitonline.controls
{
   import flash.events.Event;
   import flash.events.MouseEvent;
   import mx.controls.Image;
   import mx.core.ScrollControlBase;
   import mx.core.ScrollPolicy;
   import mx.events.FlexEvent;
   import mx.events.ScrollEvent;
   import mx.events.ScrollEventDirection;

   public class ScrollImage extends ScrollControlBase
   {
      protected var _source:String;

      private var oldMouseY:Number = NaN;

      private var oldMouseX:Number = NaN;

      protected var lineScrollSize:int = 10;

      private var deltaX:Number;

      private var deltaY:Number;

      protected var img:Image;

      public function ScrollImage()
      {
         lineScrollSize = 10;
         oldMouseX = NaN;
         oldMouseY = NaN;
         super();
         this.horizontalScrollPolicy = ScrollPolicy.AUTO;
      }

      public function get source() : String
      {
         return _source;
      }

      override protected function mouseWheelHandler(param1:MouseEvent) : void
      {
         if(param1.delta > 1)
         {
            if(img.y + img.height >= this.height)
            {
               return;
            }
         }
         else if(img.y <= 0)
         {
            return;
         }
         super.mouseWheelHandler(param1);
      }

      private function onUpdateComplete(param1:Event) : void
      {
         if(!img.content || img.content.width == 0 || img.content.height == 0)
         {
            return;
         }
         img.removeEventListener(FlexEvent.UPDATE_COMPLETE,onUpdateComplete);
         img.width = img.content.width;
         img.height = img.content.height;
         this.setScrollBarProperties(img.width,unscaledWidth,img.height,unscaledHeight);
         if(null != this.horizontalScrollBar)
         {
            this.horizontalScrollBar.lineScrollSize = lineScrollSize;
         }
         if(null != this.verticalScrollBar)
         {
            this.verticalScrollBar.lineScrollSize = lineScrollSize;
         }
         zero();
      }

      public function set source(param1:String) : void
      {
         _source = param1;
         invalidateProperties();
      }

      private function onScroll(param1:ScrollEvent) : void
      {
         if(param1.direction == ScrollEventDirection.VERTICAL)
         {
            this.img.y = -param1.position;
            if(this.img.y + this.img.height < this.height)
            {
               img.y += this.height - (img.y + img.height);
            }
            if(img.y > 0)
            {
               img.y = 0;
            }
         }
         else
         {
            this.img.x = -param1.position;
            if(img.x + img.width < this.width)
            {
               img.x += this.width - (img.x + img.width);
            }
            if(img.x > 0)
            {
               img.x = 0;
            }
         }
      }

      override protected function commitProperties() : void
      {
         super.commitProperties();
         if(!_source || _source == img.source)
         {
            return;
         }
         img.source = _source;
         img.addEventListener(FlexEvent.UPDATE_COMPLETE,onUpdateComplete);
      }

      public function set scale(param1:Number) : void
      {
         this.img.width = img.content.width * param1;
         this.img.height = img.content.height * param1;
         this.setScrollBarProperties(img.content.width * param1,unscaledWidth,img.content.height * param1,unscaledHeight);
         if(img.x + img.width < this.width)
         {
            img.x += this.width - (img.x + img.width);
         }
         if(img.y + img.height < this.height)
         {
            img.y += this.height - (img.y + img.height);
         }
      }

      public function zero() : void
      {
         img.x = img.y = 0;
         img.buttonMode = true;
         this.horizontalScrollPosition = 0;
         this.verticalScrollPosition = 0;
      }

      override protected function createChildren() : void
      {
         super.createChildren();
         img = new Image();
         img.showBusyCursor = true;
         img.includeInLayout = false;
         addChild(img);
         img.mask = this.maskShape;
         this.addEventListener(ScrollEvent.SCROLL,onScroll);
         img.addEventListener(MouseEvent.MOUSE_DOWN,onMouseDown);
         img.addEventListener(MouseEvent.MOUSE_UP,onMouseUp);
      }

      private function onMouseMove(param1:MouseEvent) : void
      {
         deltaX = -(mouseX - oldMouseX);
         deltaY = -(mouseY - oldMouseY);
         this.horizontalScrollPosition += deltaX;
         this.verticalScrollPosition += deltaY;
         if(deltaX < 0 && img.x < 0)
         {
            dispatchEvent(new ScrollEvent(ScrollEvent.SCROLL,false,false,null,this.horizontalScrollPosition,"horizontal",deltaX));
         }
         else if(deltaX > 0 && img.x + img.width > this.width)
         {
            dispatchEvent(new ScrollEvent(ScrollEvent.SCROLL,false,false,null,this.horizontalScrollPosition,"horizontal",deltaY));
         }
         if(deltaY > 0 && img.y + img.height > this.height)
         {
            dispatchEvent(new ScrollEvent(ScrollEvent.SCROLL,false,false,null,this.verticalScrollPosition,"vertical",deltaY));
         }
         else if(deltaY < 0 && img.y < 0)
         {
            dispatchEvent(new ScrollEvent(ScrollEvent.SCROLL,false,false,null,this.verticalScrollPosition,"vertical",deltaY));
         }
         oldMouseX = mouseX;
         oldMouseY = mouseY;
      }

      private function onMouseUp(param1:MouseEvent) : void
      {
         this.removeEventListener(MouseEvent.MOUSE_MOVE,onMouseMove);
      }

      private function onMouseDown(param1:MouseEvent) : void
      {
         oldMouseX = this.mouseX;
         oldMouseY = this.mouseY;
         this.addEventListener(MouseEvent.MOUSE_MOVE,onMouseMove);
         stage.addEventListener(MouseEvent.MOUSE_UP,onMouseUp);
      }
   }
}