topical media & game development
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student-ar-fl-controls-ScrollBar.ax

student-ar-fl-controls-ScrollBar.ax [swf] flex 


  // Copyright 2007. Adobe Systems Incorporated. All Rights Reserved.
  package fl.controls {        
  
          import fl.controls.BaseButton;
          import fl.controls.LabelButton;
          import fl.controls.@fileDirection;
          import fl.core.UIComponent;
          import fl.core.InvalidationType;
          import fl.events.ComponentEvent;
          import fl.events.ScrollEvent;
          import flash.display.Sprite;
          import flash.events.Event;
          import flash.events.MouseEvent;
          import flash.events.TimerEvent;
          import flash.text.TextField;
          import flash.text.TextFormat;
          import flash.utils.Timer;
          
          import fl.controls.TextInput;
          
  
      //--------------------------------------
      //  Events
      //--------------------------------------
Dispatched when the @ax-student-ar-fl-controls-ScrollBar instance's <code>scrollPosition</code> property changes. @eventType fl.events.ScrollEvent.SCROLL
see: #scrollPosition @langversion 3.0 @playerversion Flash 9.0.28.0 

  
          [Event(name="scroll", type="fl.events.ScrollEvent") ]
          
  
      //--------------------------------------
      //  Styles
      //--------------------------------------
Name of the class to use as the skin for the down arrow button of the scroll bar when it is disabled. If you change the skin, either graphically or programmatically, you should ensure that the new skin is the same height (for horizontal scroll bars) or width (for vertical scroll bars) as the track. @default ScrollArrowDown_disabledSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="downArrowDisabledSkin", type="Class")]
Name of the class to use as the skin for the down arrow button of the scroll bar when you click the arrow button. If you change the skin, either graphically or programmatically, you should ensure that the new skin is the same height (for horizontal scroll bars) or width (for vertical scroll bars) as the track. @default ScrollArrowDown_downSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="downArrowDownSkin", type="Class")]
Name of the class to use as the skin for the down arrow button of the scroll bar when the mouse pointer is over the arrow button. If you change the skin, either graphically or programmatically, you should ensure that the new skin is the same height (for horizontal scroll bars) or width (for vertical scroll bars) as the track. @default ScrollArrowDown_overSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="downArrowOverSkin", type="Class")]
Name of the class to use as the skin for the down arrow button of the scroll bar. If you change the skin, either graphically or programmatically, you should ensure that the new skin is the same height (for horizontal scroll bars) or width (for vertical scroll bars) as the track. @default ScrollArrowDown_upSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="downArrowUpSkin", type="Class")]
The skin that is used to indicate the disabled state of the thumb. @default ScrollThumb_disabledSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="thumbDisabledSkin", type="Class")]
Name of the class to use as the skin for the thumb of the scroll bar when you click the thumb. @default ScrollThumb_downSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="thumbDownSkin", type="Class")]
Name of the class to use as the skin for the thumb of the scroll bar when the mouse pointer is over the thumb. @default ScrollThumb_overSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="thumbOverSkin", type="Class")]
Name of the class to use as the skin used for the thumb of the scroll bar. @default ScrollThumb_upSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="thumbUpSkin", type="Class")]
The skin that is used to indicate a disabled track. @default ScrollTrack_Skin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="trackDisabledSkin", type="Class")]
The skin that is used to indicate the down state of a disabled skin. @default ScrollTrack_Skin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="trackDownSkin", type="Class")]
The skin that is used to indicate the mouseover state for the scroll track. @default ScrollTrack_Skin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="trackOverSkin", type="Class")]
The skin used to indicate the mouse up state for the scroll track. @default ScrollTrack_Skin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="trackUpSkin", type="Class")]
Name of the class to use as the skin for the up arrow button of the scroll bar when it is disabled. If you change the skin, either graphically or programmatically, you should ensure that the new skin is the same height (for horizontal scroll bars) or width (for vertical scroll bars) as the track. @default ScrollArrowUp_disabledSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="upArrowDisabledSkin", type="Class")]
Name of the class to use as the skin for the up arrow button of the scroll bar when you click the arrow button. If you change the skin, either graphically or programmatically, you should ensure that the new skin is the same height (for horizontal scroll bars) or width (for vertical scroll bars) as the track. @default ScrollArrowUp_downSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="upArrowDownSkin", type="Class")]
Name of the class to use as the skin for the up arrow button of the scroll bar when the mouse pointer is over the arrow button. If you change the skin, either graphically or programmatically, you should ensure that the new skin is the same height (for horizontal scroll bars) or width (for vertical scroll bars) as the track. @default ScrollArrowUp_overSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="upArrowOverSkin", type="Class")]
Name of the class to use as the skin for the up arrow button of the scroll bar. If you change the skin, either graphically or programmatically, you should ensure that the new skin is the same height (for horizontal scroll bars) or width (for vertical scroll bars) as the track. @default ScrollArrowUp_upSkin @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="upArrowUpSkin", type="Class")]
Name of the class to use as the icon for the thumb of the scroll bar. @default @file_thumbIcon @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="thumbIcon", type="Class")]
@copy fl.controls.BaseButton#style:repeatDelay @default 500 @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="repeatDelay", type="Number", format="Time")]
@copy fl.controls.BaseButton#style:repeatInterval @default 35 @langversion 3.0 @playerversion Flash 9.0.28.0 

  
      [Style(name="repeatInterval", type="Number", format="Time")]
          
  
      //--------------------------------------
      //  Class description
      //--------------------------------------
The @ax-student-ar-fl-controls-ScrollBar component provides the end user with a way to control the portion of data that is displayed when there is too much data to fit in the display area. The scroll bar consists of four parts: two arrow buttons, a track, and a thumb. The position of the thumb and display of the buttons depends on the current state of the scroll bar. The scroll bar uses four parameters to calculate its display state: a minimum range value; a maximum range value; a current position that must be within the range values; and a viewport size that must be equal to or less than the range and represents the number of items in the range that can be displayed at the same time. @langversion 3.0 @playerversion Flash 9.0.28.0 

  
          public class @ax-student-ar-fl-controls-ScrollBar extends UIComponent {
@private (internal) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public static const WIDTH:Number = 15;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private var _pageSize:Number = 10;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private var _pageScrollSize:Number = 0;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private var _lineScrollSize:Number = 1;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private var _minScrollPosition:Number = 0;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private var _maxScrollPosition:Number = 0;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private var _scrollPosition:Number = 0;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private var _direction:String = @fileDirection.VERTICAL;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private var thumbScrollOffset:Number;
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected var inDrag:Boolean = false;
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected var upArrow:BaseButton;
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected var downArrow:BaseButton;
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected var thumb:LabelButton;
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected var track:BaseButton;
                  
          // Note that there is currently no disabled state for thumb, 
                  // and track only has one state.
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  private static var defaultStyles:Object = {downArrowDisabledSkin:"ScrollArrowDown_disabledSkin",downArrowDownSkin:"ScrollArrowDown_downSkin",downArrowOverSkin:"ScrollArrowDown_overSkin",downArrowUpSkin:"ScrollArrowDown_upSkin",
                                                                                                           thumbDisabledSkin:"ScrollThumb_upSkin",thumbDownSkin:"ScrollThumb_downSkin",thumbOverSkin:"ScrollThumb_overSkin",thumbUpSkin:"ScrollThumb_upSkin",
                                                                                                           trackDisabledSkin:"ScrollTrack_skin",trackDownSkin:"ScrollTrack_skin",trackOverSkin:"ScrollTrack_skin",trackUpSkin:"ScrollTrack_skin",
                                                                                                           upArrowDisabledSkin:"ScrollArrowUp_disabledSkin",upArrowDownSkin:"ScrollArrowUp_downSkin",upArrowOverSkin:"ScrollArrowUp_overSkin",upArrowUpSkin:"ScrollArrowUp_upSkin",
                                                                                                           thumbIcon:"@file_thumbIcon",
                                                                                                           repeatDelay:500,repeatInterval:35};
@copy fl.core.UIComponent#getStyleDefinition()
see: fl.core.UIComponent#getStyle()
see: fl.core.UIComponent#setStyle()
see: fl.managers.StyleManager @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public static function getStyleDefinition():Object { 
                          return defaultStyles;
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected static const DOWN_ARROW_STYLES:Object = {
                                                                                                  disabledSkin:"downArrowDisabledSkin",
                                                                                                  downSkin:"downArrowDownSkin",
                                                                                                  overSkin:"downArrowOverSkin",
                                                                                                  upSkin:"downArrowUpSkin",
                                                                                                  repeatDelay:"repeatDelay",
                                                                                                  repeatInterval:"repeatInterval"
                                                                                                  };
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected static const THUMB_STYLES:Object = {
                                                                                                  disabledSkin:"thumbDisabledSkin",
                                                                                                  downSkin:"thumbDownSkin",
                                                                                                  overSkin:"thumbOverSkin",
                                                                                                  upSkin:"thumbUpSkin",
                                                                                                  icon:"thumbIcon",
                                                                                                  textPadding: 0
                                                                                                  };
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected static const TRACK_STYLES:Object = {
                                                                                                  disabledSkin:"trackDisabledSkin",
                                                                                                  downSkin:"trackDownSkin",
                                                                                                  overSkin:"trackOverSkin",
                                                                                                  upSkin:"trackUpSkin",
                                                                                                  repeatDelay:"repeatDelay",
                                                                                                  repeatInterval:"repeatInterval"
                                                                                                  };
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected static const UP_ARROW_STYLES:Object = {
                                                                                                  disabledSkin:"upArrowDisabledSkin",
                                                                                                  downSkin:"upArrowDownSkin",
                                                                                                  overSkin:"upArrowOverSkin",
                                                                                                  upSkin:"upArrowUpSkin",
                                                                                                  repeatDelay:"repeatDelay",
                                                                                                  repeatInterval:"repeatInterval"
                                                                                                  };
Creates a new @ax-student-ar-fl-controls-ScrollBar component instance. @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function @ax-student-ar-fl-controls-ScrollBar() {
                          super();
                          setStyles();
                          focusEnabled = false;
                  }
@copy fl.core.UIComponent#setSize()
see: #height
see: #width @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  override public function setSize(width:Number, height:Number):void {
                          if (_direction == @fileDirection.HORIZONTAL) {
                                  super.setSize(height,width);
                          } else {
                                  super.setSize(width,height);
                          }
                  }
@copy fl.core.UIComponent#width
see: #height
see: #setSize() @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  override public function get width():Number {
                          return (_direction == @fileDirection.HORIZONTAL) ? super.height : super.width;
                  }
@copy fl.core.UIComponent#height
see: #setSize()
see: #width @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  override public function get height():Number {
                          return (_direction == @fileDirection.HORIZONTAL) ? super.width : super.height;
                  }
Gets or sets a Boolean value that indicates whether the scroll bar is enabled. A value of <code>true</code> indicates that the scroll bar is enabled; a value of <code>false</code> indicates that it is not. @default true @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  override public function get enabled():Boolean {
                          return super.enabled;
                  }
@private (setter) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  override public function set enabled(value:Boolean):void {
                          super.enabled = value;
                          downArrow.enabled = track.enabled = thumb.enabled = upArrow.enabled = (enabled && _maxScrollPosition > _minScrollPosition);
                          updateThumb();
                  }
Sets the range and viewport size of the @ax-student-ar-fl-controls-ScrollBar component. The @ax-student-ar-fl-controls-ScrollBar component updates the state of the arrow buttons and size of the scroll thumb accordingly. All of the scroll properties are relative to the scale of the <code>minScrollPosition</code> and the <code>maxScrollPosition</code>. Each number between the maximum and minumum values represents one scroll position.
parameter: pageSize Size of one page. Determines the size of the thumb, and the increment by which the scroll bar moves when the arrows are clicked.
parameter: minScrollPosition Bottom of the scrolling range.
parameter: maxScrollPosition Top of the scrolling range.
parameter: pageScrollSize Increment to move when a track is pressed, in pixels.
see: #maxScrollPosition
see: #minScrollPosition
see: #pageScrollSize
see: #pageSize @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function setScrollProperties(pageSize:Number,minScrollPosition:Number,maxScrollPosition:Number,pageScrollSize:Number=0):void {
                          this.pageSize = pageSize;
                          _minScrollPosition = minScrollPosition;
                          _maxScrollPosition = maxScrollPosition;
                          if (pageScrollSize >= 0) { _pageScrollSize = pageScrollSize; }
                          enabled = (_maxScrollPosition > _minScrollPosition);
                          // ensure our scroll position is still in range:
                          setScrollPosition(_scrollPosition, false);
                          updateThumb();
                  }
Gets or sets the current scroll position and updates the position of the thumb. The <code>scrollPosition</code> value represents a relative position between the <code>minScrollPosition</code> and <code>maxScrollPosition</code> values. @default 0
see: #setScrollProperties()
see: #minScrollPosition
see: #maxScrollPosition @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function get scrollPosition():Number { return _scrollPosition; }
@private (setter) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function set scrollPosition(newScrollPosition:Number):void {
                          setScrollPosition(newScrollPosition, true);
                  }
Gets or sets a number that represents the minimum scroll position. The <code>scrollPosition</code> value represents a relative position between the <code>minScrollPosition</code> and the <code>maxScrollPosition</code> values. This property is set by the component that contains the scroll bar, and is usually zero. @default 0
see: #setScrollProperties()
see: #maxScrollPosition
see: #scrollPosition @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function get minScrollPosition():Number {
                          return _minScrollPosition;
                  }
@private (setter) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function set minScrollPosition(value:Number):void {
                          // This uses setScrollProperties because it needs to update thumb and enabled.
                          setScrollProperties(_pageSize,value,_maxScrollPosition);
                  }
Gets or sets a number that represents the maximum scroll position. The <code>scrollPosition</code> value represents a relative position between the <code>minScrollPosition</code> and the <code>maxScrollPosition</code> values. This property is set by the component that contains the scroll bar, and is the maximum value. Usually this property describes the number of pixels between the bottom of the component and the bottom of the content, but this property is often set to a different value to change the behavior of the scrolling. For example, the TextArea component sets this property to the <code>maxScrollH</code> value of the text field, so that the scroll bar scrolls appropriately by line of text. @default 0
see: #setScrollProperties()
see: #minScrollPosition
see: #scrollPosition @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function get maxScrollPosition():Number {
                          return _maxScrollPosition;
                  }
@private (setter) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function set maxScrollPosition(value:Number):void {
                          // This uses setScrollProperties because it needs to update thumb and enabled.
                          setScrollProperties(_pageSize,_minScrollPosition,value);
                  }
Gets or sets the number of lines that a page contains. The <code>lineScrollSize</code> is measured in increments between the <code>minScrollPosition</code> and the <code>maxScrollPosition</code>. If this property is 0, the scroll bar will not scroll. @default 10
see: #maxScrollPosition
see: #minScrollPosition
see: #setScrollProperties() @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function get pageSize():Number {
                          return _pageSize;
                  }
@private (setter) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function set pageSize(value:Number):void {
                          if (value > 0) {
                                  _pageSize = value;
                          }
                  }
Gets or sets a value that represents the increment by which the page is scrolled when the scroll bar track is pressed. The <code>pageScrollSize</code> value is measured in increments between the <code>minScrollPosition</code> and the <code>maxScrollPosition</code> values. If this value is set to 0, the value of the <code>pageSize</code> property is used. @default 0
see: #maxScrollPosition
see: #minScrollPosition @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function get pageScrollSize():Number {
                          return (_pageScrollSize == 0) ? _pageSize : _pageScrollSize;
                  }
@private (setter) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function set pageScrollSize(value:Number):void {
                          if (value>=0) { _pageScrollSize = value; }
                  }
Gets or sets a value that represents the increment by which to scroll the page when the scroll bar track is pressed. The <code>pageScrollSize</code> is measured in increments between the <code>minScrollPosition</code> and the <code>maxScrollPosition</code> values. If this value is set to 0, the value of the <code>pageSize</code> property is used. @default 0
see: #maxScrollPosition
see: #minScrollPosition @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function get lineScrollSize():Number {
                          return _lineScrollSize;
                  }
@private (setter) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function set lineScrollSize(value:Number):void {
                          if (value>0) {_lineScrollSize = value; }
                  }
Gets or sets a value that indicates whether the scroll bar scrolls horizontally or vertically. Valid values are <code>@fileDirection.HORIZONTAL</code> and <code>@fileDirection.VERTICAL</code>. @default @fileDirection.VERTICAL
see: fl.controls.@fileDirection @fileDirection @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function get direction():String {
                          return _direction;
                  }
@private (setter) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function set direction(value:String):void {
                          if (_direction == value) { return; }
                          _direction = value;
                          if (isLivePreview) { return; } // Rotation and scaling happens automatically in LivePreview.
                          //
                          setScaleY(1);                        
                          
                          var horizontal:Boolean = _direction == @fileDirection.HORIZONTAL;
                          if (horizontal && componentInspectorSetting) {
                                  if (rotation == 90 ) { return; }
                                  setScaleX(-1);
                                  rotation = -90;
                          }
                          
                          if (!componentInspectorSetting) {
                                  if (horizontal && rotation == 0) {
                                          rotation = -90;
                                          setScaleX(-1);
                                  } else if (!horizontal && rotation == -90 ) {
                                          rotation = 0;
                                          setScaleX(1);
                                  }
                          }
                          invalidate(InvalidationType.SIZE);
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

                  
                  override protected function configUI():void {
                          super.configUI();
                          
                          track = new BaseButton();
                          track.move(0,14);
                          track.useHandCursor = false;
                          track.autoRepeat = true;
                          track.focusEnabled = false;
                          addChild(track);
                          
                          thumb = new LabelButton();
                          thumb.label = "";
                          thumb.setSize(WIDTH,15);
                          thumb.move(0,15);
                          thumb.focusEnabled = false;
                          addChild(thumb);
                          
                          downArrow = new BaseButton();
                          downArrow.setSize(WIDTH,14);
                          downArrow.autoRepeat = true;
                          downArrow.focusEnabled = false;
                          addChild(downArrow);
                          
                          upArrow = new BaseButton();
                          upArrow.setSize(WIDTH,14);
                          upArrow.move(0,0);
                          upArrow.autoRepeat = true;
                          upArrow.focusEnabled = false;
                          addChild(upArrow);
                          
                          upArrow.addEventListener(ComponentEvent.BUTTON_DOWN,scrollPressHandler,false,0,true);
                          downArrow.addEventListener(ComponentEvent.BUTTON_DOWN,scrollPressHandler,false,0,true);
                          track.addEventListener(ComponentEvent.BUTTON_DOWN,scrollPressHandler,false,0,true);
                          thumb.addEventListener(MouseEvent.MOUSE_DOWN,thumbPressHandler,false,0,true);
                          
                          enabled = false;
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  override protected function draw():void {        
                          if (isInvalid(InvalidationType.SIZE)) {
                                  var h:Number = super.height;
                                  downArrow.move(0,  Math.max(upArrow.height, h-downArrow.height));
                                  track.setSize(WIDTH, Math.max(0, h-(downArrow.height + upArrow.height)));
                                  updateThumb();
                          }
                          if (isInvalid(InvalidationType.STYLES,InvalidationType.STATE)) {
                                  setStyles();
                          }
                          // Call drawNow on nested components to get around problems with nested render events:
                          downArrow.drawNow();
                          upArrow.drawNow();
                          track.drawNow();
                          thumb.drawNow();
                          validate();
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected function scrollPressHandler(event:ComponentEvent):void {
                          event.stopImmediatePropagation();
                          if (event.currentTarget == upArrow) {
                                  setScrollPosition(_scrollPosition-_lineScrollSize); 
                          } else if (event.currentTarget == downArrow) {
                                  setScrollPosition(_scrollPosition+_lineScrollSize);
                          } else {
                                  var mousePosition:Number = (track.mouseY)/track.height * (_maxScrollPosition-_minScrollPosition) + _minScrollPosition;
                                  var pgScroll:Number = (pageScrollSize == 0)?pageSize:pageScrollSize;
                                  if (_scrollPosition < mousePosition) {
                                          setScrollPosition(Math.min(mousePosition,_scrollPosition+pgScroll));
                                  } else if (_scrollPosition > mousePosition) {
                                          setScrollPosition(Math.max(mousePosition,_scrollPosition-pgScroll));
                                  }
                          }
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected function thumbPressHandler(event:MouseEvent):void {
                          inDrag = true;
                          thumbScrollOffset = mouseY-thumb.y;
                          thumb.mouseStateLocked = true;
                          mouseChildren = false; // Should be able to do stage.mouseChildren, but doesn't seem to work.
                          stage.addEventListener(MouseEvent.MOUSE_MOVE,handleThumbDrag,false,0,true);
                          stage.addEventListener(MouseEvent.MOUSE_UP,thumbReleaseHandler,false,0,true);
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected function handleThumbDrag(event:MouseEvent):void {
                          var pos:Number = Math.max(0, Math.min(track.height-thumb.height, mouseY-track.y-thumbScrollOffset));
                          setScrollPosition(pos/(track.height-thumb.height) * (_maxScrollPosition-_minScrollPosition) + _minScrollPosition);
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected function thumbReleaseHandler(event:MouseEvent):void {
                          inDrag = false;
                          mouseChildren = true;
                          thumb.mouseStateLocked = false;
                          stage.removeEventListener(MouseEvent.MOUSE_MOVE,handleThumbDrag);
                          stage.removeEventListener(MouseEvent.MOUSE_UP,thumbReleaseHandler);
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  public function setScrollPosition(newScrollPosition:Number, fireEvent:Boolean=true):void {
                          var oldPosition:Number = scrollPosition;
                          _scrollPosition = Math.max(_minScrollPosition,Math.min(_maxScrollPosition, newScrollPosition));
                          if (oldPosition == _scrollPosition) { return; }
                          if (fireEvent) { dispatchEvent(new ScrollEvent(_direction, scrollPosition-oldPosition, scrollPosition)); }
                          updateThumb();
                  }
@private (protected) @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected function setStyles():void {
                          copyStylesToChild(downArrow,DOWN_ARROW_STYLES);
                          copyStylesToChild(thumb,THUMB_STYLES);
                          copyStylesToChild(track,TRACK_STYLES);
                          copyStylesToChild(upArrow,UP_ARROW_STYLES);
                  }
@private @langversion 3.0 @playerversion Flash 9.0.28.0 

  
                  protected function updateThumb():void {
                          var per:Number = _maxScrollPosition - _minScrollPosition + _pageSize;
                          if (track.height <= 12 || _maxScrollPosition <= _minScrollPosition || (per == 0 || isNaN(per))) {
                                  thumb.height = 12;
                                  thumb.visible = false;
                          } else {
                                  thumb.height = Math.max(13,_pageSize / per * track.height);
                                  thumb.y = track.y+(track.height-thumb.height)*((_scrollPosition-_minScrollPosition)/(_maxScrollPosition-_minScrollPosition));
                                  thumb.visible = enabled;
                          }
                  }
          }
  }
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 27/08/2009

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