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CFDJ Authors: AppDynamics Blog, Michael Kopp, Tad Anderson, Bob Gourley, Jayaram Krishnaswamy

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CFDJ: Article

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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