ThemeLib.cpp

// Copyright (C) 2009,2010,2011,2012 GlavSoft LLC.
// All rights reserved.
//
//-------------------------------------------------------------------------
// This file is part of the TightVNC software.  Please visit our Web site:
//
//                       http://www.tightvnc.com/
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//-------------------------------------------------------------------------
//

#include "ThemeLib.h"

PFNOPENTHEMEDATA ThemeLib::s_OpenThemeData = NULL;
PFNDRAWTHEMEBACKGROUND ThemeLib::s_DrawThemeBackground = NULL;
PFNCLOSETHEMEDATA ThemeLib::s_CloseThemeData = NULL;
PFNDRAWTHEMETEXT ThemeLib::s_DrawThemeText = NULL;
PFNGETTHEMEBACKGROUNDCONTENTRECT ThemeLib::s_GetThemeBackgroundContentRect = NULL;

bool ThemeLib::s_isThemeLibLoaded = false;

HMODULE ThemeLib::s_lib = 0;

ThemeLib::ThemeLib()
{
}

ThemeLib::~ThemeLib()
{
}

bool ThemeLib::initialize()
{
  s_lib = LoadLibrary(_T("UXTHEME.DLL"));
  if (s_lib) {

    s_OpenThemeData = (PFNOPENTHEMEDATA)GetProcAddress(s_lib, "OpenThemeData");
    s_DrawThemeBackground = (PFNDRAWTHEMEBACKGROUND)GetProcAddress(s_lib, "DrawThemeBackground");
    s_CloseThemeData = (PFNCLOSETHEMEDATA)GetProcAddress(s_lib, "CloseThemeData");
    s_DrawThemeText = (PFNDRAWTHEMETEXT)GetProcAddress(s_lib, "DrawThemeText");
    s_GetThemeBackgroundContentRect = (PFNGETTHEMEBACKGROUNDCONTENTRECT)GetProcAddress(s_lib, "GetThemeBackgroundContentRect");

    if (s_OpenThemeData 
        && s_DrawThemeBackground
        && s_CloseThemeData
        && s_DrawThemeText
        && s_GetThemeBackgroundContentRect) {
      s_isThemeLibLoaded = true;
    }
  }
  return s_isThemeLibLoaded;
}

void ThemeLib::deinitialize()
{
  if (s_lib) {
    FreeLibrary(s_lib);
  }

  s_isThemeLibLoaded = false;

  s_OpenThemeData = NULL;
  s_DrawThemeBackground = NULL;
  s_CloseThemeData = NULL;
  s_DrawThemeText = NULL;
  s_GetThemeBackgroundContentRect = NULL;
}

bool ThemeLib::isLoaded()
{
  return s_isThemeLibLoaded;
}

HRESULT ThemeLib::CloseThemeData(HTHEME hTheme)
{
  return s_CloseThemeData(hTheme);
}

HRESULT ThemeLib::DrawThemeBackground(HTHEME hTheme, HDC hdc,
                                      int iPartId, int iStateId,
                                      const RECT *pRect,
                                      const RECT *pClipRect)
{
  return s_DrawThemeBackground(hTheme, hdc, iPartId, iStateId, pRect, pClipRect);
}

HTHEME ThemeLib::OpenThemeData(HWND hwnd, LPCWSTR pszClassList)
{
  return s_OpenThemeData(hwnd, pszClassList);
}

HRESULT ThemeLib::DrawThemeText(HTHEME hTheme, HDC hdc, int iPartId,
                                int iStateId, LPCWSTR pszText,
                                int iCharCount, DWORD dwTextFlags,
                                DWORD dwTextFlags2, const RECT *pRect)
{
  return s_DrawThemeText(hTheme, hdc, iPartId, iStateId, pszText,
                         iCharCount, dwTextFlags, dwTextFlags2, pRect);
}

HRESULT ThemeLib::GetThemeBackgroundContentRect(HTHEME hTheme,  HDC hdc,
                                                int iPartId, int iStateId,
                                                const RECT *pBoundingRect,
                                                RECT *pContentRect)
{
  return s_GetThemeBackgroundContentRect(hTheme, hdc, iPartId, iStateId,
                                         pBoundingRect, pContentRect);
}