59 lines
1.1 KiB
C++
59 lines
1.1 KiB
C++
#ifndef _DRAGITEMI_H
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#define _DRAGITEMI_H
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#include "dragitem.h"
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#include <bfc/common.h>
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#include <bfc/string/stringW.h>
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#include <bfc/ptrlist.h>
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class DragItemI : public DragItem
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{
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public:
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DragItemI(const wchar_t *datatype, void *datum = NULL);
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virtual ~DragItemI() {}
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void addVoidDatum(void *newdatum); // up to you to cast it right
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const wchar_t *getDatatype();
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int getNumData();
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void *getDatum(int pos = 0);
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private:
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RECVS_DISPATCH;
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StringW datatype;
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PtrList<char> datalist;
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};
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template <class T>
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class DragItemT : public DragItemI
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{
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public:
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DragItemT(T *item = NULL) : DragItemI(T::dragitem_getDatatype(), item) {}
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static inline DragItemI *create(T *item) { return new DragItemT<T>(item); }
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void addDatum(T *newdatum)
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{
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addVoidDatum(static_cast<void *>(newdatum));
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}
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};
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template <class T>
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class DragItemCast
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{
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public:
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DragItemCast(DragItem *_item, int _pos = 0) : item(_item), pos(_pos) {}
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operator T *()
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{
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if (item == NULL || !STREQL(T::dragitem_getDatatype(), item->getDatatype()))
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return NULL;
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else
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return static_cast<T*>(item->getDatum(pos));
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}
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private:
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DragItem *item;
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int pos;
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};
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#endif
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