102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: Helper for the CHudElement class to add themselves to the list of hud elements
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef HUD_ELEMENT_HELPER_H
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#define HUD_ELEMENT_HELPER_H
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#ifdef _WIN32
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#pragma once
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#endif
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class CHudElement;
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//-----------------------------------------------------------------------------
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// Purpose: Used by DECLARE_HUDELEMENT macro to create a linked list of
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// instancing functions
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//-----------------------------------------------------------------------------
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class CHudElementHelper
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{
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public:
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// Static list of helpers
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static CHudElementHelper *m_sHelpers;
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// Create all the hud elements
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static void CreateAllElements( void );
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public:
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// Construction
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CHudElementHelper( CHudElement *( *pfnCreate )( void ), int depth );
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// Accessors
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CHudElementHelper *GetNext( void );
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private:
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// Next factory in list
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CHudElementHelper *m_pNext;
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// Creation function to use for this technology
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CHudElement *( *m_pfnCreate )( void );
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//Depth used to determine hud panel ordering
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int m_iDepth;
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};
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// This is the macro which implements creation of each hud element
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// It creates a function which instances an object of the specified type
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// It them hooks that function up to the helper list so that the CHud objects can create
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// the elements by name, with no header file dependency, etc.
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#define DECLARE_HUDELEMENT( className ) \
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static CHudElement *Create_##className( void ) \
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{ \
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return new className( #className ); \
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}; \
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static CHudElementHelper g_##className##_Helper( Create_##className, 50 );
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#define DECLARE_HUDELEMENT_DEPTH( className, depth ) \
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static CHudElement *Create_##className( void ) \
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{ \
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return new className( #className ); \
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}; \
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static CHudElementHelper g_##className##_Helper( Create_##className, depth );
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#define DECLARE_NAMED_HUDELEMENT( className, panelName ) \
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static CHudElement *Create_##panelName( void ) \
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{ \
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return new className( #panelName ); \
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}; \
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static CHudElementHelper g_##panelName##_Helper( Create_##panelName, 50 );
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// This macro can be used to get a pointer to a specific hud element
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#define GET_HUDELEMENT( className ) \
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( className *)gHUD.FindElement( #className )
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#define GET_NAMED_HUDELEMENT( className, panelName ) \
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( className *)gHUD.FindElement( #panelName )
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// Things that inherit from vgui::Panel, too, will have ambiguous new operators
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// so this should disambiguate them
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#define DECLARE_MULTIPLY_INHERITED() \
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void *operator new( size_t stAllocateBlock ) \
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{ \
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return CHudElement::operator new ( stAllocateBlock ); \
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} \
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void* operator new( size_t stAllocateBlock, int nBlockUse, const char *pFileName, int nLine ) \
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{ \
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return CHudElement::operator new ( stAllocateBlock, nBlockUse, pFileName, nLine ); \
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} \
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void operator delete( void *pMem ) \
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{ \
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CHudElement::operator delete ( pMem ); \
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} \
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void operator delete( void *pMem, int nBlockUse, const char *pFileName, int nLine ) \
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{ \
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CHudElement::operator delete ( pMem, nBlockUse, pFileName, nLine ); \
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}
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// Alias for base hud element
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#define IMPLEMENT_OPERATORS_NEW_AND_DELETE DECLARE_MULTIPLY_INHERITED
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#endif // HUD_ELEMENT_HELPER_H
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