dropzone.h

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#ifndef DROPZONE_INCLUDED
#define DROPZONE_INCLUDED

//
//  define a drop-zone, which can be used to over-ride
//  drop-behaviour for any card stacks which fall under it
//

class CardStack;

class DropZone
{
    friend class CardWindow;

    DropZone(int Id, RECT *rect, pDropZoneProc proc) :
      id(Id), DropZoneCallback(proc) { CopyRect(&zone, rect); }

public:

    void SetZone(RECT *rect) { CopyRect(&zone, rect); }
    void GetZone(RECT *rect) { CopyRect(rect, &zone); }
    void SetCallback(pDropZoneProc callback) { DropZoneCallback = callback; }

    int  DropCards(CardStack &cardstack)
    {
        if(DropZoneCallback)
            return DropZoneCallback(id, cardstack);
        else
            return -1;
    }

private:

    int  id;
    RECT zone;
    pDropZoneProc DropZoneCallback;
};

#endif