llvoinventorylistener.h

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// Description of LLVOInventoryListener class, which is an interface
// for windows that are interested in updates to a ViewerObject's inventory.

#ifndef LL_LLVOINVENTORYLISTENER_H
#define LL_LLVOINVENTORYLISTENER_H

#include "llviewerobject.h"

class LLVOInventoryListener
{
public:
        virtual void inventoryChanged(LLViewerObject* object,
                                                                 InventoryObjectList* inventory,
                                                                 S32 serial_num,
                                                                 void* user_data) = 0;

        // Remove the listener from the object and clear this listener
        void removeVOInventoryListener();

        // Just clear this listener, don't worry about the object.
        void clearVOInventoryListener();

protected:
        LLVOInventoryListener() : mListenerVObject(NULL) { }
        virtual ~LLVOInventoryListener() { removeVOInventoryListener(); }

        void registerVOInventoryListener(LLViewerObject* object, void* user_data);
        void requestVOInventory();

private:
        // LLViewerObject is normally wrapped by an LLPointer, but not in
        // this case, because it's already sure to be kept alive by
        // LLPointers held by other objects that have longer lifetimes
        // than this one.  Plumbing correct LLPointer usage all the way
        // down here has been deemed too much work for now.
        LLViewerObject *mListenerVObject;
};

#endif

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