1 files changed, 180 insertions, 0 deletions
diff --git a/game/client/panelmetaclassmgr.h b/game/client/panelmetaclassmgr.h
new file mode 100644
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+++ b/game/client/panelmetaclassmgr.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: A panel "metaclass" is a name given to a particular type of 
+// panel with particular instance data. Such panels tend to be dynamically
+// added and removed from their parent panels.
+//
+// $Workfile: $
+// $NoKeywords: $
+//=============================================================================//
+
+#if !defined( PANELMETACLASSMGR_H )
+#define PANELMETACLASSMGR_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier0/dbg.h"
+#include "basetypes.h"
+#include <vgui/VGUI.h>
+
+//-----------------------------------------------------------------------------
+// forward declarations
+//-----------------------------------------------------------------------------
+class KeyValues;
+class Color;
+
+namespace vgui
+{
+	class Panel;
+}
+
+
+//-----------------------------------------------------------------------------
+// Class factory interface for metaclasses
+//-----------------------------------------------------------------------------
+abstract_class IPanelFactory
+{
+public:
+	// Creation, destruction methods
+	virtual vgui::Panel *Create( const char *pMetaClassName, KeyValues* pKeyValues, void *pInitData, vgui::Panel *pParent ) = 0;
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Singleton class responsible for managing vgui panel metaclasses
+// A metaclass is simply an association of panel implementation class with
+// various initialization data
+//-----------------------------------------------------------------------------
+abstract_class IPanelMetaClassMgr
+{
+public:
+	// Call this to load up a file containing metaclass definitions
+	virtual void LoadMetaClassDefinitionFile( const char *pFileName ) = 0;
+
+	// Call this to install a new panel type
+	// MetaClasses will refer to the panel type to create along with
+	// various initialization data
+	virtual void InstallPanelType( const char *pPanelName, IPanelFactory *pFactory ) = 0;
+
+	// Creates a metaclass panel with the specified parent panel.
+	// Chain name is used as a filter of the metaclass data; if specified,
+	// it recursively iterates through the keyvalue sections and calls
+	// chainKeyValue on sections whose name matches the chain name
+	virtual vgui::Panel *CreatePanelMetaClass( const char *pMetaClassType, 
+		int sortorder, void *pInitData, vgui::Panel *pParent, const char *pChainName = NULL ) = 0;
+
+	// removes a particular panel meta class
+	virtual void DestroyPanelMetaClass( vgui::Panel *pPanel ) = 0;
+
+protected:
+	// Don't delete me!
+	virtual ~IPanelMetaClassMgr() {}
+};
+
+
+//-----------------------------------------------------------------------------
+// Returns the panel meta class manager
+//-----------------------------------------------------------------------------
+IPanelMetaClassMgr *PanelMetaClassMgr();
+
+
+//-----------------------------------------------------------------------------
+// Helper class for simple construction of planel class factories
+// This class is expected to be a singleton
+// Note the panel must have a constructor of the following form:
+//		CPanel( vgui::Panel* );
+// and it must have the following member function:
+//		bool CPanel::Init( KeyValues* pInitData )
+// which returns true if the panel initialized successfully
+//-----------------------------------------------------------------------------
+
+#include "tier0/memdbgon.h"
+
+template< class CPanel, class CInitData >
+class CPanelFactory : public IPanelFactory
+{
+public:
+	CPanelFactory( const char *pTypeName )
+	{
+		// Hook us up baby
+		Assert( pTypeName );
+		PanelMetaClassMgr()->InstallPanelType( pTypeName, this );
+	}
+
+	// Creation, destruction methods
+	virtual vgui::Panel *Create( const char *pMetaClassName, KeyValues* pKeyValues, void *pVoidInitData, vgui::Panel *pParent )
+	{
+		// NOTE: make sure this matches the panel allocation pattern;
+		// it will break if panels are deleted differently
+		CPanel* pPanel = new CPanel( pParent, pMetaClassName ); 
+		if (pPanel)
+		{
+			// Set parent before Init; it may be needed there...
+			CInitData* pInitData = (CInitData*)(pVoidInitData); 
+			if (!pPanel->Init( pKeyValues, pInitData ))
+			{
+				delete pPanel;
+				pPanel = NULL;
+			}
+		}
+		return pPanel;
+	}
+};
+
+#include "tier0/memdbgoff.h"
+
+//-----------------------------------------------------------------------------
+// Helper macro to make panel factories one line of code. Use like this:
+//	DECLARE_PANEL_FACTORY( CEntityImagePanel, CInitData, "image" );
+// The type string is used in a panel script file to specify the type.
+// CInitData is the type of the data to pass to the init function
+//-----------------------------------------------------------------------------
+#define DECLARE_PANEL_FACTORY( _PanelClass, _InitData, _nameString )	\
+	CPanelFactory< _PanelClass, _InitData > g_ ## _PanelClass ## Factory( _nameString )
+
+
+
+//-----------------------------------------------------------------------------
+// Helper class to make meta class panels
+//-----------------------------------------------------------------------------
+class CPanelWrapper
+{
+public:
+	CPanelWrapper();
+	~CPanelWrapper();
+	void Activate( char const* pMetaClassName, vgui::Panel *pParent, int sortorder, void *pVoidInitData );
+	void Deactivate( void );
+	vgui::Panel *GetPanel( );
+
+private:
+	vgui::Panel *m_pPanel;
+};
+
+
+//-----------------------------------------------------------------------------
+// Macros for help with simple registration of panel metaclass
+// Put DECLARE_METACLASS_PANEL() in your class definition
+// and CONSTRUCT_METACLASS_PANEL() in your class constructor
+//-----------------------------------------------------------------------------
+#define DECLARE_METACLASS_PANEL( _memberName )	CPanelWrapper _memberName
+#define CONSTRUCT_METACLASS_PANEL( _memberName, _metaClassName, _parentPanel, _sortorder, _initData )	\
+	_memberName.Activate( _metaClassName, _parentPanel, _sortorder, _initData )
+#define DESTRUCT_METACLASS_PANEL( _memberName ) \
+	_memberName.Deactivate()
+
+
+//-----------------------------------------------------------------------------
+// Helper KeyValues parsing methods
+//-----------------------------------------------------------------------------
+bool ParseRGBA( KeyValues* pValues, const char* pFieldName, int& r, int& g, int& b, int& a );
+bool ParseRGBA( KeyValues* pValues, const char* pFieldName, Color& c );
+bool ParseCoord( KeyValues* pValues, const char* pFieldName, int& x, int& y );
+bool ParseRect( KeyValues* pValues, const char* pFieldName, int& x, int& y, int& w, int& h );
+
+
+/* FIXME: Why do we have KeyValues too!?!??! Bleah
+bool ParseRGBA( KeyValues *pValues, const char* pFieldName, int& r, int& g, int& b, int& a );
+bool ParseRGBA( KeyValues* pValues, const char* pFieldName, vgui::Color& c ); */
+
+#endif // PANELMETACLASSMGR_H
+\ No newline at end of file