CGII/framework/include/cgv/base/attach_slot.h

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2018-05-17 13:50:03 +00:00
#pragma once
#include "base.h"
#include "lib_begin.h"
namespace cgv {
namespace base {
/** interface for an attachment slot that can store a base pointer */
class CGV_API attach_slot
{
protected:
/// allow to attach some object to group
base_ptr attachment;
/// allow to add user data to the attachment
void* attachment_user_data;
public:
/// init the user data
attach_slot();
/// attach object to attachment slot
void attach(base_ptr attachment_object, void* user_data = 0);
/// attach object to attachment slot
void attach(base_ptr attachment_object, int user_data);
/// return current attachment
base_ptr get_attachment() const;
/// return current attachment
void* get_attachement_data() const;
/// return current attachment
int get_attachement_data_int() const;
};
//! function to attach an object to an object of type attach_slot.
/*! Return whether the slot_object implements the attach_slot interface
and could retreive the attachment. */
extern CGV_API bool attach(base_ptr slot_object, base_ptr attachment_object, void* user_data = 0);
extern CGV_API bool attach(base_ptr slot_object, base_ptr attachment_object, int user_data);
//! query the attachment of an attach_slot object.
/*! If the slot_object is not derived from the attach_slot interface,
return an empty base_ptr. */
extern CGV_API base_ptr get_attachment(base_ptr slot_object);
//! query the user data of the attachment of an attach_slot object.
/*! If the slot_object is not derived from the attach_slot interface,
return the null pointer. */
extern CGV_API void* get_attachment_data(base_ptr slot_object);
extern CGV_API int get_attachment_data_int(base_ptr slot_object);
}
}
#include <cgv/config/lib_end.h>