Long live Qt!

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diff --git a/src/gui/styles/qwindowsxpstyle_p.h b/src/gui/styles/qwindowsxpstyle_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWINDOWSXPSTYLE_P_H
+#define QWINDOWSXPSTYLE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp.  This header
+// file may change from version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qwindowsxpstyle.h"
+#include "qwindowsstyle_p.h"
+#include <qmap.h>
+#include <qt_windows.h>
+
+// Note, these tests are duplicated in qwizard_win.cpp.
+#ifdef Q_CC_GNU
+#  include <w32api.h>
+#  if (__W32API_MAJOR_VERSION >= 3 || (__W32API_MAJOR_VERSION == 2 && __W32API_MINOR_VERSION >= 5))
+#    ifdef _WIN32_WINNT
+#      undef _WIN32_WINNT
+#    endif
+#    define _WIN32_WINNT 0x0501
+#    include <commctrl.h>
+#  endif
+#endif
+
+#include <uxtheme.h>
+
+#if WINVER >= 0x0600
+#include <vssym32.h>
+#else
+#include <tmschema.h>
+#endif
+
+#include <limits.h>
+
+QT_BEGIN_NAMESPACE
+
+// Older Platform SDKs do not have the extended DrawThemeBackgroundEx
+// function. We add the needed parts here, and use the extended
+// function dynamically, if available in uxtheme.dll. Else, we revert
+// back to using the DrawThemeBackground function.
+#ifndef DTBG_OMITBORDER
+#  ifndef DTBG_CLIPRECT
+#   define DTBG_CLIPRECT        0x00000001
+#  endif
+#  ifndef DTBG_DRAWSOLID
+#   define DTBG_DRAWSOLID       0x00000002
+#  endif
+#  ifndef DTBG_OMITBORDER
+#   define DTBG_OMITBORDER      0x00000004
+#  endif
+#  ifndef DTBG_OMITCONTENT
+#   define DTBG_OMITCONTENT     0x00000008
+#  endif
+#  ifndef DTBG_COMPUTINGREGION
+#   define DTBG_COMPUTINGREGION 0x00000010
+#  endif
+#  ifndef DTBG_MIRRORDC
+#   define DTBG_MIRRORDC        0x00000020
+#  endif
+    typedef struct _DTBGOPTS
+    {
+        DWORD dwSize;
+        DWORD dwFlags;
+        RECT rcClip;
+    } DTBGOPTS, *PDTBGOPTS;
+#endif // _DTBGOPTS
+
+// Undefined for some compile environments
+#ifndef TMT_TEXTCOLOR
+#  define TMT_TEXTCOLOR 3803
+#endif
+#ifndef TMT_BORDERCOLORHINT
+#  define TMT_BORDERCOLORHINT 3822
+#endif
+#ifndef TMT_BORDERSIZE
+#  define TMT_BORDERSIZE 2403
+#endif
+#ifndef TMT_BORDERONLY
+#  define TMT_BORDERONLY 2203
+#endif
+#ifndef TMT_TRANSPARENTCOLOR
+#  define TMT_TRANSPARENTCOLOR 3809
+#endif
+#ifndef TMT_CAPTIONMARGINS
+#  define TMT_CAPTIONMARGINS 3603
+#endif
+#ifndef TMT_CONTENTMARGINS
+#  define TMT_CONTENTMARGINS 3602
+#endif
+#ifndef TMT_SIZINGMARGINS
+#  define TMT_SIZINGMARGINS 3601
+#endif
+#ifndef TMT_GLYPHTYPE
+#  define TMT_GLYPHTYPE 4012
+#endif
+#ifndef TMT_BGTYPE
+#  define TMT_BGTYPE 4001
+#endif
+#ifndef TMT_TEXTSHADOWTYPE
+#    define TMT_TEXTSHADOWTYPE 4010
+#endif
+#ifndef TMT_BORDERCOLOR
+#    define TMT_BORDERCOLOR 3801
+#endif
+#ifndef BT_IMAGEFILE
+#  define BT_IMAGEFILE 0
+#endif
+#ifndef BT_BORDERFILL
+#  define BT_BORDERFILL 1
+#endif
+#ifndef BT_NONE
+#  define BT_NONE 2
+#endif
+#ifndef TMT_FILLCOLOR
+#  define TMT_FILLCOLOR 3802
+#endif
+#ifndef TMT_PROGRESSCHUNKSIZE
+#  define TMT_PROGRESSCHUNKSIZE 2411
+#endif
+
+// TMT_TEXTSHADOWCOLOR is wrongly defined in mingw
+#if TMT_TEXTSHADOWCOLOR != 3818
+#undef TMT_TEXTSHADOWCOLOR
+#define TMT_TEXTSHADOWCOLOR 3818
+#endif
+#ifndef TST_NONE
+#  define TST_NONE 0
+#endif
+
+#ifndef GT_NONE
+#  define GT_NONE 0
+#endif
+#ifndef GT_IMAGEGLYPH
+#  define GT_IMAGEGLYPH 1
+#endif
+
+// These defines are missing from the tmschema, but still exist as
+// states for their parts
+#ifndef MINBS_INACTIVE
+#define MINBS_INACTIVE 5
+#endif
+#ifndef MAXBS_INACTIVE
+#define MAXBS_INACTIVE 5
+#endif
+#ifndef RBS_INACTIVE
+#define RBS_INACTIVE 5
+#endif
+#ifndef HBS_INACTIVE
+#define HBS_INACTIVE 5
+#endif
+#ifndef CBS_INACTIVE
+#define CBS_INACTIVE 5
+#endif
+
+// Uncomment define below to build debug assisting code, and output
+// #define DEBUG_XP_STYLE
+
+#if !defined(QT_NO_STYLE_WINDOWSXP)
+
+// Declarations -----------------------------------------------------------------------------------
+class XPThemeData
+{
+public:
+    XPThemeData(const QWidget *w = 0, QPainter *p = 0, const QString &theme = QString(),
+                int part = 0, int state = 0, const QRect &r = QRect())
+        : widget(w), painter(p), name(theme), htheme(0), partId(part), stateId(state),
+          mirrorHorizontally(false), mirrorVertically(false), noBorder(false),
+          noContent(false), rotate(0), rect(r)
+    {}
+
+    HRGN mask();
+    HTHEME handle();
+
+    RECT toRECT(const QRect &qr);
+    bool isValid();
+
+    const QWidget *widget;
+    QPainter *painter;
+    QString name;
+    HTHEME htheme;
+    int partId;
+    int stateId;
+
+    uint mirrorHorizontally : 1;
+    uint mirrorVertically : 1;
+    uint noBorder : 1;
+    uint noContent : 1;
+    uint rotate;
+    QRect rect;
+};
+
+struct ThemeMapKey {
+    QString name;
+    int partId;
+    int stateId;
+    bool noBorder;
+    bool noContent;
+
+    ThemeMapKey() : partId(-1), stateId(-1) {}
+    ThemeMapKey(const XPThemeData &data)
+        : name(data.name), partId(data.partId), stateId(data.stateId),
+        noBorder(data.noBorder), noContent(data.noContent) {}
+
+};
+
+inline uint qHash(const ThemeMapKey &key)
+{ return qHash(key.name) ^ key.partId ^ key.stateId; }
+
+inline bool operator==(const ThemeMapKey &k1, const ThemeMapKey &k2)
+{
+    return k1.name == k2.name
+           && k1.partId == k2.partId
+           && k1.stateId == k2.stateId;
+}
+
+enum AlphaChannelType {
+    UnknownAlpha = -1,          // Alpha of part & state not yet known
+    NoAlpha,                    // Totally opaque, no need to touch alpha (RGB)
+    MaskAlpha,                  // Alpha channel must be fixed            (ARGB)
+    RealAlpha                   // Proper alpha values from Windows       (ARGB_Premultiplied)
+};
+
+struct ThemeMapData {
+    AlphaChannelType alphaType; // Which type of alpha on part & state
+
+    bool dataValid         : 1; // Only used to detect if hash value is ok
+    bool partIsTransparent : 1;
+    bool hasAnyData        : 1; // False = part & state has not data, NOP
+    bool hasAlphaChannel   : 1; // True =  part & state has real Alpha
+    bool wasAlphaSwapped   : 1; // True =  alpha channel needs to be swapped
+    bool hadInvalidAlpha   : 1; // True =  alpha channel contained invalid alpha values
+
+    ThemeMapData() : dataValid(false), partIsTransparent(false), hasAnyData(false),
+                     hasAlphaChannel(false), wasAlphaSwapped(false), hadInvalidAlpha(false) {}
+};
+
+class QWindowsXPStylePrivate : public QWindowsStylePrivate
+{
+    Q_DECLARE_PUBLIC(QWindowsXPStyle)
+public:
+    QWindowsXPStylePrivate()
+        : QWindowsStylePrivate(), hasInitColors(false), bufferDC(0), bufferBitmap(0), nullBitmap(0),
+          bufferPixels(0), bufferW(0), bufferH(0)
+    { init(); }
+
+    ~QWindowsXPStylePrivate()
+    { cleanup(); }
+
+    static HWND winId(const QWidget *widget);
+
+    void init(bool force = false);
+    void cleanup(bool force = false);
+    void cleanupHandleMap();
+    const QPixmap *tabBody(QWidget *widget);
+
+    HBITMAP buffer(int w = 0, int h = 0);
+    HDC bufferHDC()
+    { return bufferDC;}
+
+    static bool resolveSymbols();
+    static bool useXP(bool update = false);
+
+    bool isTransparent(XPThemeData &themeData);
+    QRegion region(XPThemeData &themeData);
+
+    void setTransparency(QWidget *widget, XPThemeData &themeData);
+    void drawBackground(XPThemeData &themeData);
+    void drawBackgroundThruNativeBuffer(XPThemeData &themeData);
+    void drawBackgroundDirectly(XPThemeData &themeData);
+
+    bool hasAnyData(const QRect &rect);
+    bool hasAlphaChannel(const QRect &rect);
+    bool fixAlphaChannel(const QRect &rect);
+    bool swapAlphaChannel(const QRect &rect, bool allPixels = false);
+
+    QRgb groupBoxTextColor;
+    QRgb groupBoxTextColorDisabled;
+    QRgb sliderTickColor;
+    bool hasInitColors;
+
+    static QMap<QString,HTHEME> *handleMap;
+
+    QIcon dockFloat, dockClose;
+
+private:
+#ifdef DEBUG_XP_STYLE
+    void dumpNativeDIB(int w, int h);
+    void showProperties(XPThemeData &themeData);
+#endif
+
+    static QBasicAtomicInt ref;
+    static bool use_xp;
+    static QWidget *limboWidget;
+    static QPixmap *tabbody;
+
+    QHash<ThemeMapKey, ThemeMapData> alphaCache;
+    HDC bufferDC;
+    HBITMAP bufferBitmap;
+    HBITMAP nullBitmap;
+    uchar *bufferPixels;
+    int bufferW, bufferH;
+};
+
+#endif // QT_NO_STYLE_WINDOWS
+
+QT_END_NAMESPACE
+
+#endif //QWINDOWSXPSTYLE_P_H