Add Chinese (Simplified & Traditional) localization support

engine/cl_main.cpp

@@ -2736,7 +2736,7 @@ void CL_SetSteamCrashComment()
 //
 static ConCommand startupmenu( "startupmenu", &CL_CheckToDisplayStartupMenus, "Opens initial menu screen and loads the background bsp, but only if no other level is being loaded, and we're not in developer mode." );
 
-ConVar cl_language( "cl_language", "english", FCVAR_USERINFO, "Language (from HKCU\\Software\\Valve\\Steam\\Language)" );
+ConVar cl_language( "cl_language", "english", FCVAR_USERINFO | FCVAR_ARCHIVE, "Language (from HKCU\\Software\\Valve\\Steam\\Language)" );
 void CL_InitLanguageCvar()
 {
 	Msg("CL_InitLanguageCvar\n");

gameui/OptionsDialog.cpp

@@ -29,6 +29,7 @@
 #include "OptionsSubMultiplayer.h"
 #include "OptionsSubDifficulty.h"
 #include "OptionsSubPortal.h"
+#include "OptionsSubLanguage.h"
 #ifdef WIN32
 // NVNT haptic configuration dialog
 #include "OptionsSubHaptics.h"
@@ -96,6 +97,9 @@ COptionsDialog::COptionsDialog(vgui::Panel *parent) : PropertyDialog(parent, "Op
 	m_pOptionsSubVideo = new COptionsSubVideo(this);
 	AddPage(m_pOptionsSubVideo, "#GameUI_Video");
 
+	// Language selection page
+	AddPage(new COptionsSubLanguage(this), "#GameUI_Language");
+
 	if ( !ModInfo().IsSinglePlayerOnly() ) 
 	{
 		AddPage(new COptionsSubVoice(this), "#GameUI_Voice");

gameui/OptionsSubLanguage.cpp

@@ -0,0 +1,133 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Language selection options page
+//
+//=============================================================================//
+#include "OptionsSubLanguage.h"
+
+#include "EngineInterface.h"
+#include "vgui_controls/ComboBox.h"
+#include "vgui_controls/Label.h"
+
+#include <KeyValues.h>
+#include <vgui/IScheme.h>
+#include <vgui/ILocalize.h>
+#include "tier1/convar.h"
+#include "common/language.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include <tier0/memdbgon.h>
+
+using namespace vgui;
+
+// Languages offered in the UI selection
+struct LanguageOption_t
+{
+	ELanguage	eLang;
+	const char	*pchName;		// Display name (localization token)
+};
+
+static const LanguageOption_t s_LanguageOptions[] =
+{
+	{ k_Lang_English,				"#GameUI_Language_English" },
+	{ k_Lang_Simplified_Chinese,	"#GameUI_Language_Simplified_Chinese" },
+	{ k_Lang_Traditional_Chinese,	"#GameUI_Language_Traditional_Chinese" },
+	{ k_Lang_Japanese,				"#GameUI_Language_Japanese" },
+	{ k_Lang_Korean,				"#GameUI_Language_Korean" },
+	{ k_Lang_German,				"#GameUI_Language_German" },
+	{ k_Lang_French,				"#GameUI_Language_French" },
+	{ k_Lang_Spanish,				"#GameUI_Language_Spanish" },
+	{ k_Lang_Russian,				"#GameUI_Language_Russian" },
+};
+
+COptionsSubLanguage::COptionsSubLanguage(vgui::Panel *parent) : PropertyPage(parent, NULL)
+{
+	m_pLanguageLabel = new Label(this, "LanguageLabel", "#GameUI_Language");
+
+	m_pLanguageCombo = new ComboBox(this, "LanguageCombo", 10, false);
+	m_pLanguageCombo->AddActionSignalTarget(this);
+
+	for ( int i = 0; i < Q_ARRAYSIZE(s_LanguageOptions); ++i )
+	{
+		KeyValues *pData = new KeyValues("Language", "lang", (int)s_LanguageOptions[i].eLang);
+		m_pLanguageCombo->AddItem(s_LanguageOptions[i].pchName, pData);
+	}
+
+	LoadControlSettings("Resource\\OptionsSubLanguage.res");
+}
+
+COptionsSubLanguage::~COptionsSubLanguage()
+{
+}
+
+void COptionsSubLanguage::ApplySchemeSettings(vgui::IScheme *pScheme)
+{
+	BaseClass::ApplySchemeSettings(pScheme);
+}
+
+void COptionsSubLanguage::OnResetData()
+{
+	// Read the current language from cl_language
+	ConVarRef cl_language("cl_language");
+	const char *pchLang = cl_language.IsValid() ? cl_language.GetString() : "english";
+
+	ELanguage eLang = PchLanguageToELanguage(pchLang, k_Lang_English);
+	m_nCurrentLanguage = (int)eLang;
+
+	// Select the matching item
+	for ( int i = 0; i < m_pLanguageCombo->GetItemCount(); ++i )
+	{
+		KeyValues *pData = m_pLanguageCombo->GetItemUserData(i);
+		if ( pData && pData->GetInt("lang") == m_nCurrentLanguage )
+		{
+			m_pLanguageCombo->ActivateItem(i);
+			break;
+		}
+	}
+}
+
+void COptionsSubLanguage::OnApplyChanges()
+{
+	KeyValues *pData = m_pLanguageCombo->GetActiveItemUserData();
+	if ( !pData )
+		return;
+
+	int nLang = pData->GetInt("lang", k_Lang_English);
+	if ( nLang == m_nCurrentLanguage )
+		return;
+
+	ELanguage eLang = (ELanguage)nLang;
+	const char *pchShortName = GetLanguageShortName(eLang);
+
+	// Update cl_language
+	ConVarRef cl_language("cl_language");
+	if ( cl_language.IsValid() )
+	{
+		cl_language.SetValue(pchShortName);
+	}
+
+	// Reload all localization files so the new language takes effect
+	if ( g_pVGuiLocalize )
+	{
+		g_pVGuiLocalize->RemoveAll();
+		g_pVGuiLocalize->AddFile("Resource/gameui_%language%.txt", "GAME", true);
+		g_pVGuiLocalize->AddFile("Resource/valve_%language%.txt", "GAME", true);
+		g_pVGuiLocalize->AddFile("Resource/platform_%language%.txt");
+		g_pVGuiLocalize->AddFile("Resource/vgui_%language%.txt");
+	}
+
+	m_nCurrentLanguage = nLang;
+}
+
+void COptionsSubLanguage::OnControlModified(Panel *panel)
+{
+	if ( panel == m_pLanguageCombo )
+	{
+		SetModified(true);
+	}
+}
+
+void COptionsSubLanguage::OnTextChanged(Panel *panel)
+{
+	OnControlModified(panel);
+}

gameui/OptionsSubLanguage.h

@@ -0,0 +1,48 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Language selection options page
+//
+//=============================================================================//
+
+#ifndef OPTIONS_SUB_LANGUAGE_H
+#define OPTIONS_SUB_LANGUAGE_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include <vgui_controls/PropertyPage.h>
+
+namespace vgui
+{
+	class Label;
+	class ComboBox;
+	class Panel;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Language selection, Part of OptionsDialog
+//-----------------------------------------------------------------------------
+class COptionsSubLanguage : public vgui::PropertyPage
+{
+	DECLARE_CLASS_SIMPLE( COptionsSubLanguage, vgui::PropertyPage );
+
+public:
+	COptionsSubLanguage(vgui::Panel *parent);
+	~COptionsSubLanguage();
+
+	virtual void OnResetData();
+	virtual void OnApplyChanges();
+
+protected:
+	virtual void ApplySchemeSettings(vgui::IScheme *pScheme);
+
+	MESSAGE_FUNC_PTR( OnControlModified, "ControlModified", panel );
+	MESSAGE_FUNC_PTR( OnTextChanged, "TextChanged", panel );
+
+private:
+	vgui::ComboBox	*m_pLanguageCombo;
+	vgui::Label		*m_pLanguageLabel;
+	int				m_nCurrentLanguage;
+};
+
+#endif // OPTIONS_SUB_LANGUAGE_H