ddceaab001
This undocumented "private" class was used for various windows UxTheme functions which are available since WinXP. As wxWidgets 3.1 is XP+ it does not make sense anymore to load the theme functions dynamically.
116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/msw/uxtheme.h
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// Purpose: wxUxThemeEngine class: support for XP themes
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// Author: John Platts, Vadim Zeitlin
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// Modified by:
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// Created: 2003
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// Copyright: (c) 2003 John Platts, Vadim Zeitlin
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_UXTHEME_H_
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#define _WX_UXTHEME_H_
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#include "wx/defs.h"
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#include "wx/msw/private.h" // we use GetHwndOf()
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#include <uxtheme.h>
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// Amazingly, GetThemeFont() and GetThemeSysFont() functions use LOGFONTA under
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// XP but LOGFONTW (even in non-Unicode build) under later versions of Windows.
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// If we declare them as taking LOGFONT below, the code would be able to
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// silently pass LOGFONTA to them in ANSI build and would crash at run-time
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// under Windows Vista/7 because of a buffer overrun (LOGFONTA being smaller
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// than LOGFONTW expected by these functions). If we we declare them as taking
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// LOGFONTW, the code wouldn't work correctly under XP. So we use a special
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// wxUxThemeFont class to encapsulate this and intentionally change the LOGFONT
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// output parameters of the theme functions to take it instead.
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class wxUxThemeFont
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{
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public:
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// Trivial default ctor.
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wxUxThemeFont() { }
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#if wxUSE_UNICODE
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// In Unicode build we always use LOGFONT anyhow so this class is
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// completely trivial.
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LPLOGFONTW GetPtr() { return &m_lfW; }
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const LOGFONTW& GetLOGFONT() { return m_lfW; }
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#else // !wxUSE_UNICODE
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// Return either LOGFONTA or LOGFONTW pointer as required by the current
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// Windows version.
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LPLOGFONTW GetPtr()
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{
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return UseLOGFONTW() ? &m_lfW
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: reinterpret_cast<LPLOGFONTW>(&m_lfA);
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}
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// This method returns LOGFONT (i.e. LOGFONTA in ANSI build and LOGFONTW in
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// Unicode one) which can be used with other, normal, Windows or wx
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// functions. Internally it may need to transform LOGFONTW to LOGFONTA.
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const LOGFONTA& GetLOGFONT()
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{
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if ( UseLOGFONTW() )
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{
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// Most of the fields are the same in LOGFONTA and LOGFONTW so just
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// copy everything by default.
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memcpy(&m_lfA, &m_lfW, sizeof(m_lfA));
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// But the face name must be converted from Unicode.
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WideCharToMultiByte(CP_ACP, 0, m_lfW.lfFaceName, -1,
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m_lfA.lfFaceName, sizeof(m_lfA.lfFaceName),
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NULL, NULL);
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}
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return m_lfA;
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}
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private:
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static bool UseLOGFONTW()
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{
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return wxGetWinVersion() >= wxWinVersion_Vista;
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}
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LOGFONTA m_lfA;
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#endif // wxUSE_UNICODE/!wxUSE_UNICODE
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private:
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LOGFONTW m_lfW;
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wxDECLARE_NO_COPY_CLASS(wxUxThemeFont);
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};
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WXDLLIMPEXP_CORE bool wxUxThemeIsActive();
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// ----------------------------------------------------------------------------
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// wxUxThemeHandle: encapsulates ::Open/CloseThemeData()
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// ----------------------------------------------------------------------------
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class wxUxThemeHandle
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{
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public:
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wxUxThemeHandle(const wxWindow *win, const wchar_t *classes)
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{
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m_hTheme = (HTHEME)::OpenThemeData(GetHwndOf(win), classes);
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}
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operator HTHEME() const { return m_hTheme; }
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~wxUxThemeHandle()
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{
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if ( m_hTheme )
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{
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::CloseThemeData(m_hTheme);
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}
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}
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private:
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HTHEME m_hTheme;
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wxDECLARE_NO_COPY_CLASS(wxUxThemeHandle);
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};
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#endif // _WX_UXTHEME_H_
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