winamp/Src/Wasabi/api/wnd/dragitemi.h

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2024-09-24 12:54:57 +00:00
#ifndef _DRAGITEMI_H
#define _DRAGITEMI_H
#include "dragitem.h"
#include <bfc/common.h>
#include <bfc/string/stringW.h>
#include <bfc/ptrlist.h>
class DragItemI : public DragItem
{
public:
DragItemI(const wchar_t *datatype, void *datum = NULL);
virtual ~DragItemI() {}
void addVoidDatum(void *newdatum); // up to you to cast it right
const wchar_t *getDatatype();
int getNumData();
void *getDatum(int pos = 0);
private:
RECVS_DISPATCH;
StringW datatype;
PtrList<char> datalist;
};
template <class T>
class DragItemT : public DragItemI
{
public:
DragItemT(T *item = NULL) : DragItemI(T::dragitem_getDatatype(), item) {}
static inline DragItemI *create(T *item) { return new DragItemT<T>(item); }
void addDatum(T *newdatum)
{
addVoidDatum(static_cast<void *>(newdatum));
}
};
template <class T>
class DragItemCast
{
public:
DragItemCast(DragItem *_item, int _pos = 0) : item(_item), pos(_pos) {}
operator T *()
{
if (item == NULL || !STREQL(T::dragitem_getDatatype(), item->getDatatype()))
return NULL;
else
return static_cast<T*>(item->getDatum(pos));
}
private:
DragItem *item;
int pos;
};
#endif