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vgui2/vgui_controls/BuildFactoryHelper.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Helper for the CHudElement class to add themselves to the list of hud elements
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "vgui/IVGui.h"
+#include "vgui_controls/MessageMap.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+using namespace vgui;
+
+// Start with empty list
+CBuildFactoryHelper *CBuildFactoryHelper::m_sHelpers = NULL;
+
+//-----------------------------------------------------------------------------
+// Purpose: Constructs a panel  factory
+// Input  : pfnCreate - fn Ptr to a function which generates a panel
+//-----------------------------------------------------------------------------
+CBuildFactoryHelper::CBuildFactoryHelper( char const *className, PANELCREATEFUNC func )
+{
+	// Make this fatal
+	if ( HasFactory( className ) )
+	{
+		Error( "CBuildFactoryHelper:  Factory for '%s' already exists!!!!\n", className );
+	}
+
+	//List is empty, or element belongs at front, insert here
+	m_pNext			= m_sHelpers;
+	m_sHelpers		= this;
+
+	Assert( func );
+	m_CreateFunc = func;
+	Assert( className );
+	m_pClassName = className;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Returns next object in list
+// Output : CBuildFactoryHelper
+//-----------------------------------------------------------------------------
+CBuildFactoryHelper *CBuildFactoryHelper::GetNext( void )
+{ 
+	return m_pNext;
+}
+
+char const *CBuildFactoryHelper::GetClassName() const
+{
+	return m_pClassName;
+}
+
+vgui::Panel *CBuildFactoryHelper::CreatePanel()
+{
+	if ( !m_CreateFunc )
+		return NULL;
+
+	return ( *m_CreateFunc )();
+}
+
+// private static meethod
+bool CBuildFactoryHelper::HasFactory( char const *className )
+{
+	CBuildFactoryHelper *p = m_sHelpers;
+	while ( p )
+	{
+		if ( !Q_stricmp( className, p->GetClassName() ) )
+			return true;
+
+		p = p->GetNext();
+	}
+	return false;
+}
+
+// static method
+vgui::Panel *CBuildFactoryHelper::InstancePanel( char const *className )
+{
+	CBuildFactoryHelper *p = m_sHelpers;
+	while ( p )
+	{
+		if ( !Q_stricmp( className, p->GetClassName() ) )
+			return p->CreatePanel();
+
+		p = p->GetNext();
+	}
+	return NULL;
+}
+
+// static method
+void CBuildFactoryHelper::GetFactoryNames( CUtlVector< char const * >& list )
+{
+	list.RemoveAll();
+
+	CBuildFactoryHelper *p = m_sHelpers;
+	while ( p )
+	{
+		list.AddToTail( p->GetClassName() );
+		p = p->GetNext();
+	}
+}
+
+
+