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DragAndDropSprite.cpp

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//*** DragAndDropSprite.cpp **

#include "DragAndDropSprite.h"
#include "BitmapStrip.h"
#include "Bitmap.h"
#include "SpriteControllerManager.h"
#include "SpriteController.h"
#include "SpriteAction_ButtonStateCrossFade.h"


//** Constructor ***

DragAndDropSprite::DragAndDropSprite():
   dragging_(false),
   dragOffsetX_(0),
   dragOffsetY_(0)
   {

   }


//** Constructor ***

DragAndDropSprite::DragAndDropSprite(SpriteManager* spriteManager):
   Button(spriteManager),
   dragging_(false),
   dragOffsetX_(0),
   dragOffsetY_(0)
   {

   }


//*** OnMouseOver ***

bool DragAndDropSprite::OnMouseOver(int x, int y, bool button, StringId& eventId, void*& userData)
   {
   if (!IsEnabled())
      {
      dragging_=false;
      return false;
      }

   if (dragging_)
      {
      SetPosition((float)x-dragOffsetX_,(float)y-dragOffsetY_);
      }


   const BitmapStrip& bitmapStrip=GetBitmap();
   if (bitmapStrip.GetCelCount()!=0)
      {
      int currentCel=(int)GetCel();
      const Bitmap& bitmap=bitmapStrip.GetCel(currentCel);
      if (bitmap.GetPixelAlpha(x-(int)(GetX()+GetOriginX()),y-(int)(GetY()+GetOriginY()))>128)
         {
         if (IsEnabled())
            {
         // highlighted_=true;
            if (button)
               {
               SetState(State_Pressed);
               if (!dragging_)
                  {
                  dragOffsetX_=x-GetX()+GetOriginX();
                  dragOffsetY_=y-GetY()+GetOriginY();
                  }
               dragging_=true;
               }
            else
               {
               SetState(State_Highlighted);
               dragging_=false;
               }
            }

         eventId=GetEventId();
         userData=GetEventUserData();

         return true;
         }
      }

   return false;
   }

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