129 lines
3.1 KiB
C++
129 lines
3.1 KiB
C++
/*--------------------------------------------------------------------------*
|
||
*
|
||
* Microsoft Windows
|
||
* Copyright (C) Microsoft Corporation, 1992 - 1999
|
||
*
|
||
* File: subclass.h
|
||
*
|
||
* Contents: Interface file for the dynamic subclass manager
|
||
*
|
||
* History: 06-May-98 JeffRo Created
|
||
*
|
||
*--------------------------------------------------------------------------*/
|
||
|
||
#ifndef __SUBCLASS_H__
|
||
#define __SUBCLASS_H__
|
||
#pragma once
|
||
|
||
|
||
// remove the definition from windowsx.h that conflicts with declarations here
|
||
#ifdef SubclassWindow
|
||
#undef SubclassWindow
|
||
#endif
|
||
|
||
|
||
|
||
/*--------------------------------------------------------------------------*
|
||
* CSubclasser
|
||
*
|
||
* Derive a class from this to implement subclassing the subclass manager
|
||
* way.
|
||
*--------------------------------------------------------------------------*/
|
||
|
||
class CSubclasser
|
||
{
|
||
public:
|
||
virtual ~CSubclasser() {}
|
||
|
||
virtual LRESULT Callback (HWND& hwnd, UINT& msg, WPARAM& wParam,
|
||
LPARAM& lParam, bool& fPassMessageOn) = 0;
|
||
};
|
||
|
||
|
||
/*----------------*/
|
||
/* SubclasserData */
|
||
/*----------------*/
|
||
class SubclasserData
|
||
{
|
||
public:
|
||
SubclasserData (CSubclasser* pSubclasser_ = NULL, HWND hwnd = NULL)
|
||
: pSubclasser (pSubclasser_),
|
||
hwnd (hwnd),
|
||
cRefs (0),
|
||
fZombie (false)
|
||
{}
|
||
|
||
UINT AddRef ()
|
||
{ return (++cRefs); }
|
||
|
||
UINT Release ()
|
||
{ ASSERT (cRefs > 0); return (--cRefs); }
|
||
|
||
bool operator==(const SubclasserData& other) const
|
||
{ return (pSubclasser == other.pSubclasser); }
|
||
|
||
bool operator<(const SubclasserData& other) const
|
||
{ return (pSubclasser < other.pSubclasser); }
|
||
|
||
CSubclasser* pSubclasser;
|
||
|
||
private:
|
||
friend class WindowContext;
|
||
|
||
HWND hwnd;
|
||
UINT cRefs;
|
||
bool fZombie;
|
||
};
|
||
|
||
typedef std::list<SubclasserData> SubclasserList;
|
||
typedef std::set< SubclasserData> SubclasserSet;
|
||
|
||
|
||
/*---------------*/
|
||
/* WindowContext */
|
||
/*---------------*/
|
||
class WindowContext
|
||
{
|
||
public:
|
||
WindowContext() : pfnOriginalWndProc(NULL)
|
||
{}
|
||
|
||
bool IsZombie(const SubclasserData& subclasser) const;
|
||
void Insert(SubclasserData& subclasser);
|
||
UINT Remove(SubclasserData& subclasser);
|
||
void RemoveZombies();
|
||
|
||
SubclasserList Subclassers;
|
||
WNDPROC pfnOriginalWndProc;
|
||
|
||
private:
|
||
void Zombie(SubclasserData& subclasser, bool fZombie);
|
||
|
||
SubclasserSet Zombies;
|
||
};
|
||
|
||
|
||
/*------------------*/
|
||
/* CSubclassManager */
|
||
/*------------------*/
|
||
class CSubclassManager
|
||
{
|
||
public:
|
||
bool SubclassWindow (HWND hwnd, CSubclasser* pSubclasser);
|
||
bool UnsubclassWindow (HWND hwnd, CSubclasser* pSubclasser);
|
||
|
||
private:
|
||
typedef std::map<HWND, WindowContext> ContextMap;
|
||
ContextMap m_ContextMap;
|
||
|
||
bool PhysicallyUnsubclassWindow (HWND hwnd, bool fForce = false);
|
||
LRESULT SubclassProcWorker (HWND, UINT, WPARAM, LPARAM);
|
||
|
||
static LRESULT CALLBACK SubclassProc (HWND, UINT, WPARAM, LPARAM);
|
||
};
|
||
|
||
CSubclassManager& GetSubclassManager();
|
||
|
||
|
||
#endif /* __SUBCLASS_H__ */
|