63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/itemid.h
|
|
// Purpose: wxItemId class declaration.
|
|
// Author: Vadim Zeitlin
|
|
// Created: 2011-08-17
|
|
// RCS-ID: $Id: itemid.h 68916 2011-08-27 14:11:03Z VZ $
|
|
// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
|
|
// Licence: wxWindows licence
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _WX_ITEMID_H_
|
|
#define _WX_ITEMID_H_
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// wxItemId: an opaque item identifier used with wx{Tree,TreeList,DataView}Ctrl.
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// The template argument T is typically a pointer to some opaque type. While
|
|
// wxTreeItemId and wxDataViewItem use a pointer to void, this is dangerous and
|
|
// not recommended for the new item id classes.
|
|
template <typename T>
|
|
class wxItemId
|
|
{
|
|
public:
|
|
typedef T Type;
|
|
|
|
// This ctor is implicit which is fine for non-void* types, but if you use
|
|
// this class with void* you're strongly advised to make the derived class
|
|
// ctor explicit as implicitly converting from any pointer is simply too
|
|
// dangerous.
|
|
wxItemId(Type item = NULL) : m_pItem(item) { }
|
|
|
|
// Default copy ctor, assignment operator and dtor are ok.
|
|
|
|
bool IsOk() const { return m_pItem != NULL; }
|
|
Type GetID() const { return m_pItem; }
|
|
operator const Type() const { return m_pItem; }
|
|
|
|
// This is used for implementation purposes only.
|
|
Type operator->() const { return m_pItem; }
|
|
|
|
void Unset() { m_pItem = NULL; }
|
|
|
|
// This field is public *only* for compatibility with the old wxTreeItemId
|
|
// implementation and must not be used in any new code.
|
|
//private:
|
|
Type m_pItem;
|
|
};
|
|
|
|
template <typename T>
|
|
bool operator==(const wxItemId<T>& left, const wxItemId<T>& right)
|
|
{
|
|
return left.GetID() == right.GetID();
|
|
}
|
|
|
|
template <typename T>
|
|
bool operator!=(const wxItemId<T>& left, const wxItemId<T>& right)
|
|
{
|
|
return !(left == right);
|
|
}
|
|
|
|
#endif // _WX_ITEMID_H_
|