atltheme.h

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// Windows Template Library - WTL version 7.1
// Copyright (C) 1997-2003 Microsoft Corporation
// All rights reserved.
//
// This file is a part of the Windows Template Library.
// The code and information is provided "as-is" without
// warranty of any kind, either expressed or implied.

#ifndef __ATLTHEME_H__
#define __ATLTHEME_H__

#pragma once

#ifndef __cplusplus
	#error ATL requires C++ compilation (use a .cpp suffix)
#endif

#ifdef _WIN32_WCE
	#error atltheme.h is not supported on Windows CE
#endif

#ifndef __ATLAPP_H__
	#error atltheme.h requires atlapp.h to be included first
#endif

#ifndef __ATLWIN_H__
	#error atltheme.h requires atlwin.h to be included first
#endif

#if (_WIN32_WINNT < 0x0501)
	#error atltheme.h requires _WIN32_WINNT >= 0x0501
#endif //(_WIN32_WINNT < 0x0501)

#include <tmschema.h>
#include <uxtheme.h>
#pragma comment(lib, "uxtheme.lib")

// Note: To create an application that also runs on older versions of Windows,
// use delay load of uxtheme.dll and ensure that no calls to the Theme API are
// made if theming is not supported. It is enough to check if m_hTheme is NULL.
// Example:
//	if(m_hTheme != NULL)
//	{
//		DrawThemeBackground(dc, BP_PUSHBUTTON, PBS_NORMAL, &rect, NULL);
//		DrawThemeText(dc, BP_PUSHBUTTON, PBS_NORMAL, L"Button", -1, DT_SINGLELINE | DT_CENTER | DT_VCENTER, 0, &rect);
//	}
//	else
//	{
//		dc.DrawFrameControl(&rect, DFC_BUTTON, DFCS_BUTTONPUSH);
//		dc.DrawText(_T("Button"), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
//	}
//
// Delay load is NOT AUTOMATIC for VC++ 7, you have to link to delayimp.lib, 
// and add uxtheme.dll in the Linker.Input.Delay Loaded DLLs section of the 
// project properties.
#if (_MSC_VER < 1300) && !defined(_WTL_NO_THEME_DELAYLOAD)
  #pragma comment(lib, "delayimp.lib")
  #pragma comment(linker, "/delayload:uxtheme.dll")
#endif //(_MSC_VER < 1300) && !defined(_WTL_NO_THEME_DELAYLOAD)


///////////////////////////////////////////////////////////////////////////////
// Classes in this file:
//
// CTheme
// CThemeImpl<T, TBase>
//
// Global functions:
//   AtlDrawThemeClientEdge()


namespace WTL
{

///////////////////////////////////////////////////////////////////////////////
// CTheme - wrapper for theme handle

class CTheme
{
public:
// Data members
	HTHEME m_hTheme;
	static int m_nIsThemingSupported;

// Constructor
	CTheme() : m_hTheme(NULL)
	{
		IsThemingSupported();
	}

// Operators and helpers
	bool IsThemeNull() const
	{
		return (m_hTheme == NULL);
	}

	CTheme& operator =(HTHEME hTheme)
	{
		m_hTheme = hTheme;
		return *this;
	}

	operator HTHEME() const
	{
		return m_hTheme;
	}

	void Attach(HTHEME hTheme)
	{
		m_hTheme = hTheme;
	}

	HTHEME Detach()
	{
		HTHEME hTheme = m_hTheme;
		m_hTheme = NULL;
		return hTheme;
	}

// Theme support helper
	static bool IsThemingSupported()
	{
		if(m_nIsThemingSupported == -1)
		{
			CStaticDataInitCriticalSectionLock lock;
			if(FAILED(lock.Lock()))
			{
				ATLTRACE2(atlTraceUI, 0, _T("ERROR : Unable to lock critical section in CTheme::IsThemingSupported.\n"));
				ATLASSERT(FALSE);
				return false;
			}

			if(m_nIsThemingSupported == -1)
			{
				HMODULE hThemeDLL = ::LoadLibrary(_T("uxtheme.dll"));
				m_nIsThemingSupported = (hThemeDLL != NULL) ? 1 : 0;
				if(hThemeDLL != NULL)
					::FreeLibrary(hThemeDLL);
			}

			lock.Unlock();
		}

		ATLASSERT(m_nIsThemingSupported != -1);
		return (m_nIsThemingSupported == 1);
	}

// Operations and theme properties
	HTHEME OpenThemeData(HWND hWnd, LPCWSTR pszClassList)
	{
		if(!IsThemingSupported())
			return NULL;

		ATLASSERT(m_hTheme == NULL);
		m_hTheme = ::OpenThemeData(hWnd, pszClassList);
		return m_hTheme;
	}

	HRESULT CloseThemeData()
	{
		HRESULT hRet = S_FALSE;
		if(m_hTheme != NULL)
		{
			hRet = ::CloseThemeData(m_hTheme);
			if(SUCCEEDED(hRet))
				m_hTheme = NULL;
		}
		return hRet;
	}

	HRESULT DrawThemeBackground(HDC hDC, int nPartID, int nStateID, LPCRECT pRect, LPCRECT pClipRect = NULL)
	{
		ATLASSERT(m_hTheme != NULL);
		return ::DrawThemeBackground(m_hTheme, hDC, nPartID, nStateID, pRect, pClipRect);
	}

	HRESULT DrawThemeText(HDC hDC, int nPartID, int nStateID, LPCWSTR pszText, int nCharCount, DWORD dwTextFlags, DWORD dwTextFlags2, LPCRECT pRect)
	{
		ATLASSERT(m_hTheme != NULL);
		return ::DrawThemeText(m_hTheme, hDC, nPartID, nStateID, pszText, nCharCount, dwTextFlags, dwTextFlags2, pRect);
	}

	HRESULT GetThemeBackgroundContentRect(HDC hDC, int nPartID, int nStateID,  LPCRECT pBoundingRect, LPRECT pContentRect) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeBackgroundContentRect(m_hTheme, hDC, nPartID, nStateID,  pBoundingRect, pContentRect);
	}

	HRESULT GetThemeBackgroundExtent(HDC hDC, int nPartID, int nStateID, LPCRECT pContentRect, LPRECT pExtentRect) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeBackgroundExtent(m_hTheme, hDC, nPartID, nStateID, pContentRect, pExtentRect);
	}

	HRESULT GetThemePartSize(HDC hDC, int nPartID, int nStateID, LPRECT pRect, enum THEMESIZE eSize, LPSIZE pSize) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemePartSize(m_hTheme, hDC, nPartID, nStateID, pRect, eSize, pSize);
	}

	HRESULT GetThemeTextExtent(HDC hDC, int nPartID, int nStateID, LPCWSTR pszText, int nCharCount, DWORD dwTextFlags, LPCRECT  pBoundingRect, LPRECT pExtentRect) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeTextExtent(m_hTheme, hDC, nPartID, nStateID, pszText, nCharCount, dwTextFlags, pBoundingRect, pExtentRect);
	}

	HRESULT GetThemeTextMetrics(HDC hDC, int nPartID, int nStateID, PTEXTMETRIC pTextMetric) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeTextMetrics(m_hTheme, hDC, nPartID, nStateID, pTextMetric);
	}

	HRESULT GetThemeBackgroundRegion(HDC hDC, int nPartID, int nStateID, LPCRECT pRect, HRGN* pRegion) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeBackgroundRegion(m_hTheme, hDC, nPartID, nStateID, pRect, pRegion);
	}

	HRESULT HitTestThemeBackground(HDC hDC, int nPartID, int nStateID, DWORD dwOptions, LPCRECT pRect, HRGN hrgn, POINT ptTest, WORD* pwHitTestCode) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::HitTestThemeBackground(m_hTheme, hDC, nPartID, nStateID, dwOptions, pRect, hrgn, ptTest, pwHitTestCode);
	}

	HRESULT DrawThemeEdge(HDC hDC, int nPartID, int nStateID, LPCRECT pDestRect, UINT uEdge, UINT uFlags, LPRECT pContentRect = NULL)
	{
		ATLASSERT(m_hTheme != NULL);
		return ::DrawThemeEdge(m_hTheme, hDC, nPartID, nStateID, pDestRect, uEdge, uFlags, pContentRect);
	}

	HRESULT DrawThemeIcon(HDC hDC, int nPartID, int nStateID, LPCRECT pRect, HIMAGELIST himl, int nImageIndex)
	{
		ATLASSERT(m_hTheme != NULL);
		return ::DrawThemeIcon(m_hTheme, hDC, nPartID, nStateID, pRect, himl, nImageIndex);
	}

	BOOL IsThemePartDefined(int nPartID, int nStateID) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::IsThemePartDefined(m_hTheme, nPartID, nStateID);
	}

	BOOL IsThemeBackgroundPartiallyTransparent(int nPartID, int nStateID) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::IsThemeBackgroundPartiallyTransparent(m_hTheme, nPartID, nStateID);
	}

	HRESULT GetThemeColor(int nPartID, int nStateID, int nPropID, COLORREF* pColor) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeColor(m_hTheme, nPartID, nStateID, nPropID, pColor);
	}

	HRESULT GetThemeMetric(HDC hDC, int nPartID, int nStateID, int nPropID, int* pnVal) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeMetric(m_hTheme, hDC, nPartID, nStateID, nPropID, pnVal);
	}

	HRESULT GetThemeString(int nPartID, int nStateID, int nPropID, LPWSTR pszBuff, int cchMaxBuffChars) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeString(m_hTheme, nPartID, nStateID, nPropID, pszBuff, cchMaxBuffChars);
	}

	HRESULT GetThemeBool(int nPartID, int nStateID, int nPropID, BOOL* pfVal) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeBool(m_hTheme, nPartID, nStateID, nPropID, pfVal);
	}

	HRESULT GetThemeInt(int nPartID, int nStateID, int nPropID, int* pnVal) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeInt(m_hTheme, nPartID, nStateID, nPropID, pnVal);
	}

	HRESULT GetThemeEnumValue(int nPartID, int nStateID, int nPropID, int* pnVal) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeEnumValue(m_hTheme, nPartID, nStateID, nPropID, pnVal);
	}

	HRESULT GetThemePosition(int nPartID, int nStateID, int nPropID, LPPOINT pPoint) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemePosition(m_hTheme, nPartID, nStateID, nPropID, pPoint);
	}

	HRESULT GetThemeFont(int nPartID, HDC hDC, int nStateID, int nPropID, LOGFONT* pFont) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeFont(m_hTheme, hDC, nPartID, nStateID, nPropID, pFont);
	}

	HRESULT GetThemeRect(int nPartID, int nStateID, int nPropID, LPRECT pRect) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeRect(m_hTheme, nPartID, nStateID, nPropID, pRect);
	}

	HRESULT GetThemeMargins(HDC hDC, int nPartID, int nStateID, int nPropID, LPRECT pRect, PMARGINS pMargins) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeMargins(m_hTheme, hDC, nPartID, nStateID, nPropID, pRect, pMargins);
	}

	HRESULT GetThemeIntList(int nPartID, int nStateID, int nPropID, INTLIST* pIntList) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeIntList(m_hTheme, nPartID, nStateID, nPropID, pIntList);
	}

	HRESULT GetThemePropertyOrigin(int nPartID, int nStateID, int nPropID, enum PROPERTYORIGIN* pOrigin) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemePropertyOrigin(m_hTheme, nPartID, nStateID, nPropID, pOrigin);
	}

	HRESULT GetThemeFilename(int nPartID, int nStateID, int nPropID, LPWSTR pszThemeFileName, int cchMaxBuffChars) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeFilename(m_hTheme, nPartID, nStateID, nPropID, pszThemeFileName, cchMaxBuffChars);
	}

	COLORREF GetThemeSysColor(int nColorID) const
	{
		ATLASSERT(m_hTheme != NULL);
		return ::GetThemeSysColor(m_hTheme, nColorID);
	}