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Freely Available "SizeableTitleWindow" With Adobe's ColdFusion/Flex Connectivity

I found that Adobe includes a really nice resizeable closeable window

In playing around with the ColdFusion/Flex wizards, I found that Adobe includes a really nice resizeable closeable window.  When I get more time, I'll integrate this with my MaximizeRestorePanel class.


package com.adobe.ColdFusion.components
{
 import mx.containers.TitleWindow;
 import mx.managers.CursorManager;
 import mx.managers.ISystemManager;
 import mx.controls.Alert;
 import mx.logging.Log;
 import mx.utils.ObjectUtil;
 import mx.controls.Button;
 import flash.events.MouseEvent;
 import flash.events.Event;
 import flash.system.System;
 import flash.geom.Rectangle;
 
 public class SizeableTitleWindow extends TitleWindow
 {
   private const dragThreshold:int = 2;
   // sanity constraints. 
   private const minSizeWidth:int = 180; 
   private const minSizeHeight:int = 220;
   
   public const cursorSizeNone:int = -1;
   public const cursorSizeNE:int   = 0;
   public const cursorSizeN:int    = 1;
   public const cursorSizeNW:int   = 2;
   public const cursorSizeW:int    = 3;
   public const cursorSizeSW:int   = 4;
   public const cursorSizeS:int    = 5;
   public const cursorSizeSE:int   = 6;
   public const cursorSizeE:int    = 7;
   public const cursorSizeAll:int  = 8;
   
   [Embed(source="cursorImages/sizeNS.gif")]
   public static var sizeNSCursorSymbol:Class;

   [Embed(source="cursorImages/sizeNESW.gif")]
   public static var sizeNESWCursorSymbol:Class;
   
   [Embed(source="cursorImages/sizeWE.gif")]
   public static var sizeWECursorSymbol:Class;

   [Embed(source="cursorImages/sizeNWSE.gif")]
   public static var sizeNWSECursorSymbol:Class;
         
   [Embed(source="cursorImages/sizeAll.gif")]
   public static var sizeAllCursorSymbol:Class;

   private var downX:int;
   private var downY:int;
   private var startLeft:int;
   private var startTop:int;
   private var startHeight:int;
   private var startWidth:int;
   
   private var resizeCursor:int;
   private var currentCursorID:int;
   private var prevCursor:int;
   private var isResizing:Boolean;
   
   public function SizeableTitleWindow()
   {
    super();
    isResizing = false;
    currentCursorID = CursorManager.NO_CURSOR;
    prevCursor = cursorSizeNone;
   }
   
   override protected function createChildren():void
   {
    super.createChildren();

    // make the cursor change to the resize cursor
    this.titleBar.addEventListener(MouseEvent.MOUSE_MOVE, titleBar_resizeMoveListener);
    this.addEventListener(MouseEvent.MOUSE_MOVE, resizeMoveListener);
    
    this.addEventListener(MouseEvent.MOUSE_OUT, cursorMouseOutListener);
    
    // since the titlebar mousedown listener calls startDragging, but the listener is private
    // we will do our checking in the overridden startDragging event for the titlebar
    this.addEventListener(MouseEvent.MOUSE_DOWN, resizeDownListener);

   }
   
   protected function getCursorStyle(x:int, y:int, isTitleBar:Boolean):int
   {
    if (isResizing)
     return resizeCursor;
    
    // the NW corner has to be done in a seperate section because this
    // corner is twitchy and we add a 1 pix buffer
    if (x >= 0 && x <= dragThreshold + 1 && y >= 0 && y <= dragThreshold + 1)
    {
     return cursorSizeNW;
    } else if (x >= 0 && x <= dragThreshold)
    {
     if (y >= this.height - dragThreshold)
     {
      return cursorSizeSW;
     } else {
      return cursorSizeW;
     }
    } else if (x >= this.width - dragThreshold)
    {
     if (y >= 0 && y <= dragThreshold)
     {
      return cursorSizeNE;
     } else if (y >= this.height - dragThreshold)
     {
      return cursorSizeSE;
     } else {
      return cursorSizeE;
     }     
    } else if (y >= 0 && y <= dragThreshold)
    {
     return cursorSizeN;
    } else if (y >= this.height - dragThreshold)
    {
     return cursorSizeS;
// if you want to have the "move" style cursor when over the title bar, uncomment the next three lines     
//    } else if (isTitleBar)
//    {
//     return cursorSizeAll;
    }
    return cursorSizeNone;
   }
   
   protected function clearCursor():void
   {
    if (currentCursorID != CursorManager.NO_CURSOR)
    {
     CursorManager.removeCursor(currentCursorID);
     currentCursorID = CursorManager.NO_CURSOR;
    }
    prevCursor = cursorSizeNone;    
   }
   
   /**
    *  @protected
    *  Returns the height of the header.
    */
   protected function getHeaderHeight():Number
   {
    var headerHeight:Number = getStyle("headerHeight");
    
    if (isNaN(headerHeight))
     headerHeight = measureHeaderText().height + HEADER_PADDING;
    
    return headerHeight;
   }
   
   /**
    *  @protected. Returns a Rectangle containing the largest piece of header
    *  text (can be either the title or status, whichever is bigger).
    */
   protected function measureHeaderText():Rectangle
   {
    var textWidth:Number = 20;
    var textHeight:Number = 14;
    
    if (titleTextField && titleTextField.text)
    {
     titleTextField.validateNow();
     textWidth = titleTextField.textWidth;
     textHeight = titleTextField.textHeight;
    }
    
    if (statusTextField)
    {
     statusTextField.validateNow();
     textWidth = Math.max(textWidth, statusTextField.textWidth);
     textHeight = Math.max(textHeight, statusTextField.textHeight);
    }
    
    return new Rectangle(0, 0, textWidth, textHeight);
   }
         
   protected function adjustCursor(event:MouseEvent, isTitleBar:Boolean):void
   {
    var c:int;
    
    // we only want the move event from the title bar itself, not from it's children
    // otherwise you get weird cursor behavior in the middle of the titlebar
    if (isTitleBar && event.target != titleBar)
    {
     c = cursorSizeAll;
    } else {
     c = getCursorStyle(event.localX, event.localY, isTitleBar);
    }
    
    // don't switch stuff around if we don't have to
    if (c == prevCursor)
    {
     return;
    }
    
    prevCursor = c;
        
    clearCursor();
    
    switch (c)
    {
// if you want to have the "move" style cursor when over the title bar, uncomment the next three lines     
//     case cursorSizeAll:
//      currentCursorID = CursorManager.setCursor(sizeAllCursorSymbol, 2, -10, -10); 
//      break;
     case cursorSizeE:
     case cursorSizeW:
      currentCursorID = CursorManager.setCursor(sizeWECursorSymbol, 2, -10, -11);    
      break;
     case cursorSizeNW:
     case cursorSizeSE:
      currentCursorID = CursorManager.setCursor(sizeNWSECursorSymbol, 2, -11, -11);
      break;
     case cursorSizeNE:
     case cursorSizeSW:
      currentCursorID = CursorManager.setCursor(sizeNESWCursorSymbol, 2, -11, -10);
      break;
     case cursorSizeN:
     case cursorSizeS:
      currentCursorID = CursorManager.setCursor(sizeNSCursorSymbol, 2, -10, -10);
      break;
    }
   }
      
   protected function titleBar_resizeMoveListener(event:MouseEvent):void
   {
    if (event.target is Button)
    {
     //the base class doesn't give me access to "closeButton", so this
     //is the only way to check if we are over the button
     clearCursor();
     return;
    }

    adjustCursor(event, true);
   }
   
   protected function resizeMoveListener(event:MouseEvent):void
   {
    if (event.localY > getHeaderHeight())  //don't do it twice, the title bar takes care of it
    {
     adjustCursor(event, false);
    }
   }
   
   override protected function startDragging(event:MouseEvent):void
   {
    // check for the threshholds first, 
    // if we are within the threshold do our stuff, else call super
    var cursorStyle:int = getCursorStyle(event.localX, event.localY, true);
    if (cursorStyle != cursorSizeNone && cursorStyle != cursorSizeAll )
    {
     startSizing(cursorStyle, event.stageX, event.stageY);
    } else {
     super.startDragging(event);
    }
   }
   
   protected function resizeDownListener(event:MouseEvent):void
   {
    // check for the threshholds first,
    // if we are within the threshold do our stuff, else call super
    var cursorStyle:int = getCursorStyle(event.localX, event.localY, false);
    if (cursorStyle != cursorSizeNone && cursorStyle != cursorSizeAll)
    {
     startSizing(cursorStyle, event.stageX, event.stageY);
    }     
   }
   
   protected function startSizing(cursor:int, x:int, y:int):void
   {
    downX = x;
    downY = y;
    startHeight = this.height;
    startWidth = this.width;
    startLeft = this.x;
    startTop = this.y;
    resizeCursor = cursor;
    isResizing = true;        
        
    systemManager.addEventListener(
     MouseEvent.MOUSE_MOVE, systemManager_resizeMouseMoveHandler, true);
  
    systemManager.addEventListener(
     MouseEvent.MOUSE_UP, systemManager_resizeMouseUpHandler, true);
  
    stage.addEventListener(
     Event.MOUSE_LEAVE, stage_resizeMouseLeaveHandler);
   }   
 
   protected function stopSizing():void
   {
    isResizing = false;
    
    systemManager.removeEventListener(
     MouseEvent.MOUSE_MOVE, systemManager_resizeMouseMoveHandler, true);
  
    systemManager.removeEventListener(
     MouseEvent.MOUSE_UP, systemManager_resizeMouseUpHandler, true);
  
    stage.removeEventListener(
     Event.MOUSE_LEAVE, stage_resizeMouseLeaveHandler);

    clearCursor();
   }
   
   private function sizeWidth(event:MouseEvent):void
   {
    var tmp:int;
    tmp = startWidth + event.stageX - downX;
    if (tmp >= minSizeWidth)  
    {
     this.width = tmp;
    }    
   }

   private function sizeHeight(event:MouseEvent):void
   {
    var tmp:int;
    tmp = startHeight + event.stageY - downY;
    if (tmp >= minSizeHeight)  
    {
     this.height = tmp;
    }
   }
      
   private function sizeTop(event:MouseEvent):int
   {
    var tmp:int;
    var delta:int = downY - event.stageY;
    tmp = startHeight + delta;
    if (tmp < minSizeHeight)  
    {     
     delta = minSizeHeight - startHeight;
     tmp = startHeight + delta;     
    }
    
    this.height = tmp;
    return delta;
//    return 0;
   }

   private function sizeLeft(event:MouseEvent):int
   {
    var tmp:int;
    var delta:int = downX - event.stageX;
    tmp = startWidth + delta;
    if (tmp < minSizeWidth)  
    {
     delta = minSizeWidth - startWidth;
     tmp = startWidth + delta;
    }
    
    this.width = tmp;
    return delta;
//    return 0;
   }

   /**
    *  @private
    */
   private function systemManager_resizeMouseMoveHandler(event:MouseEvent):void
   {
    var leftDelta:int=0;
    var topDelta:int=0;    
    switch (resizeCursor)
    {
     case cursorSizeE:
      sizeWidth(event);
      break;
     case cursorSizeSE:
      sizeWidth(event);
      sizeHeight(event);
      break;      
     case cursorSizeS:
      sizeHeight(event);
      break;
     case cursorSizeSW:
      leftDelta = sizeLeft(event);
      sizeHeight(event);
      break;
     case cursorSizeW:
      leftDelta = sizeLeft(event);
      break;
     case cursorSizeNW:
      topDelta = sizeTop(event);
      leftDelta = sizeLeft(event);
      break;
     case cursorSizeN:
      topDelta = sizeTop(event);
      break;
     case cursorSizeNE:
      topDelta = sizeTop(event);
      sizeWidth(event);
      break;
    }
    
    // when sizing, we only want to do the move once (multiple moves cause ugly refresh problems)
    // a move happens when dragging involves the left or top side    
    if (leftDelta != 0 || topDelta != 0)
    {
     move(startLeft - leftDelta, startTop - topDelta);
    }
   }
       
   /**
    *  @private
    */
   private function systemManager_resizeMouseUpHandler(event:MouseEvent):void
   {
    stopSizing();
   }
  
   /**
    *  @private
    */
   private function stage_resizeMouseLeaveHandler(event:Event):void
   {
    stopSizing();
   }   
   
   private function cursorMouseOutListener(event:MouseEvent):void
   {
    if (!isResizing)
    {
     clearCursor();
    }
   }
  
 }
}

You can find the associated images for this class in the zip file here.

posted Friday, 9 June 2006

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Most Recent Comments
Todd Cullen 05/22/07 01:19:48 AM EDT

I realize that your trying to make one class to encompass the entire window's functionality but wouldn't you want to use the Decorator design pattern to seperate some of the functionality from the core class? Improving its reuseability in the long-run. Solid code, just a question regarding your design pattern.

SYS-CON Italy News Desk 06/09/06 02:12:43 PM EDT

In playing around with the ColdFusion/Flex wizards, I found that Adobe includes a really nice resizeable closeable window. When I get more time, I'll integrate this with my MaximizeRestorePanel class.

Web Developer's & Designer's Journal 06/09/06 01:32:26 PM EDT

In playing around with the ColdFusion/Flex wizards, I found that Adobe includes a really nice resizeable closeable window. When I get more time, I'll integrate this with my MaximizeRestorePanel class.

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