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#include <qapplication.h>
#include <qwidget.h>
#include <qpainter.h>
#include <qpaintengine.h>
#include <qdrawutil.h>
#include "qdecorationdefault_qws.h"

QT_BEGIN_NAMESPACE

#if !defined(QT_NO_QWS_DECORATION_DEFAULT) || defined(QT_PLUGIN)

QPixmap *QDecorationDefault::staticHelpPixmap = 0;
QPixmap *QDecorationDefault::staticMenuPixmap = 0;
QPixmap *QDecorationDefault::staticClosePixmap = 0;
QPixmap *QDecorationDefault::staticMinimizePixmap = 0;
QPixmap *QDecorationDefault::staticMaximizePixmap = 0;
QPixmap *QDecorationDefault::staticNormalizePixmap = 0;

#ifndef QT_NO_IMAGEFORMAT_XPM

/* XPM */
static const char * const default_menu_xpm[] = {
/* width height ncolors chars_per_pixel */
"16 16 11 1",
/* colors */
"  c #000000",
". c #336600",
"X c #666600",
"o c #99CC00",
"O c #999933",
"+ c #333300",
"@ c #669900",
"# c #999900",
"$ c #336633",
"% c #666633",
"& c #99CC33",
/* pixels */
"oooooooooooooooo",
"oooooooooooooooo",
"ooooo#.++X#ooooo",
"ooooX      Xoooo",
"oooX  XO#%  X&oo",
"oo#  Ooo&@O  Ooo",
"oo. Xoo#+ @X Xoo",
"oo+ OoO+ +O# +oo",
"oo+ #O+  +## +oo",
"oo. %@ ++ +. Xoo",
"oo#  O@OO+   #oo",
"oooX  X##$   Ooo",
"ooooX        Xoo",
"oooo&OX++X#OXooo",
"oooooooooooooooo",
"oooooooooooooooo"
};

static const char * const default_help_xpm[] = {
"16 16 3 1",
"       s None  c None",
".      c #ffffff",
"X      c #707070",
"                ",
"                ",
"    ......      ",
"   ..XXXXXX     ",
"   .XX   .XX    ",
"   .XX   .XX    ",
"        ..XX    ",
"       ..XX     ",
"      ..XX      ",
"      .XX       ",
"      .XX       ",
"      ..        ",
"      .XX       ",
"      .XX       ",
"                ",
"                "};

static const char * const default_close_xpm[] = {
"16 16 3 1",
"       s None  c None",
".      c #ffffff",
"X      c #707070",
"                ",
"                ",
"  .X        .X  ",
"  .XX      .XX  ",
"   .XX    .XX   ",
"    .XX  .XX    ",
"     .XX.XX     ",
"      .XXX      ",
"      .XXX      ",
"     .XX.XX     ",
"    .XX  .XX    ",
"   .XX    .XX   ",
"  .XX      .XX  ",
"  .X        .X  ",
"                ",
"                "};

static const char * const default_maximize_xpm[] = {
"16 16 3 1",
"       s None  c None",
".      c #ffffff",
"X      c #707070",
"                ",
"                ",
"  ...........   ",
"  .XXXXXXXXXX   ",
"  .X       .X   ",
"  .X       .X   ",
"  .X       .X   ",
"  .X       .X   ",
"  .X       .X   ",
"  .X       .X   ",
"  .X       .X   ",
"  .X........X   ",
"  .XXXXXXXXXX   ",
"                ",
"                ",
"                "};

static const char * const default_minimize_xpm[] = {
"16 16 3 1",
"       s None  c None",
".      c #ffffff",
"X      c #707070",
"                ",
"                ",
"                ",
"                ",
"                ",
"                ",
"       ...      ",
"       . X      ",
"       .XX      ",
"                ",
"                ",
"                ",
"                ",
"                ",
"                ",
"                "};

static const char * const default_normalize_xpm[] = {
"16 16 3 1",
"       s None  c None",
".      c #ffffff",
"X      c #707070",
"                ",
"                ",
"     ........   ",
"     .XXXXXXXX  ",
"     .X     .X  ",
"     .X     .X  ",
"  ....X...  .X  ",
"  .XXXXXXXX .X  ",
"  .X     .XXXX  ",
"  .X     .X     ",
"  .X     .X     ",
"  .X......X     ",
"  .XXXXXXXX     ",
"                ",
"                ",
"                "};

#endif // QT_NO_IMAGEFORMAT_XPM

/*!
  \class QDecorationDefault
  \since 4.4
  \ingroup qws
  \brief The QDecorationDefault class is a base class providing default window decorations.

  See the documentation for class QDecoration for a detailed
  description. This subclass of QDecoration provides standard
  icons for the decoration regions.

  Note that this class is non-portable and only available in
  \l{Qt for Embedded Linux}.
 */

/*!
  Default constructor.
 */
QDecorationDefault::QDecorationDefault()
    : QDecoration()
{
    menu_width = 20;
    help_width = 20;
    close_width = 20;
    minimize_width = 20;
    maximize_width = 20;
    normalize_width = 20;
}

/*!
  The constructor deletes the static pixmaps.
 */
QDecorationDefault::~QDecorationDefault()
{
    delete staticMenuPixmap;
    delete staticClosePixmap;
    delete staticMinimizePixmap;
    delete staticMaximizePixmap;
    delete staticNormalizePixmap;

    // This makes it safe to delete and then create a QDecorationDefault
    staticMenuPixmap = 0;
    staticClosePixmap = 0;
    staticMinimizePixmap = 0;
    staticMaximizePixmap = 0;
    staticNormalizePixmap = 0;
}

/*!
  \fn const char **QDecorationDefault::xpmForRegion(int region)

  Returns a pointer to the X pixmap for the icon specified by
  \a region. An X pixmap is an ASCII-text-based image. The value
  of \a region must be one of a subset of the values of enum
  DecorationRegion. The supported values are \e Help, \e Menu,
  \e Close, \e Minimize, \e Maximize, and \e Normalize. Other
  values of \a region cause zero to be returned.

  \sa QDecoration::DecorationRegion
 */
const char **QDecorationDefault::xpmForRegion(int reg)
{
#ifdef QT_NO_IMAGEFORMAT_XPM
    Q_UNUSED(reg);
#else
    switch(reg)
    {
    case Help:
        return (const char **)default_help_xpm;
    case Menu:
        return (const char **)default_menu_xpm;
    case Close:
        return (const char **)default_close_xpm;
    case Minimize:
        return (const char **)default_minimize_xpm;
    case Maximize:
        return (const char **)default_maximize_xpm;
    case Normalize:
        return (const char **)default_normalize_xpm;
    }
#endif
    return 0;
}

/*!
    \fn QPixmap QDecorationDefault::pixmapFor(const QWidget *widget,
    int decorationRegion, int &xoff, int &yoff)

    Returns a pointer to the QPixmap for the widget specified by \a widget and
    \a decorationRegion. The returned QPixmap is constructed from the default
    X pixmap obtained from xpmForRegion().

    \a xoff and \a yoff specify the offset for the pixmap.

    The value of \a decorationRegion must be one of a subset of the values
    of enum DecorationRegion. The supported values are \e Help,
    \e Menu, \e Close, \e Minimize, \e Maximize, and \e Normalize.
    Other values of \a decorationRegion return 0.

    \sa QDecoration::DecorationRegion
*/
QPixmap QDecorationDefault::pixmapFor(const QWidget *widget,
                                      int decorationRegion,
                                      int &xoff,
                                      int &/*yoff*/)
{
#ifdef QT_NO_IMAGEFORMAT_XPM
    Q_UNUSED(widget);
    Q_UNUSED(decorationRegion);
    Q_UNUSED(xoff);
    return QPixmap();
#else
    static const char **staticHelpPixmapXPM = 0;
    static const char **staticMenuPixmapXPM = 0;
    static const char **staticClosePixmapXPM = 0;
    static const char **staticMinimizePixmapXPM = 0;
    static const char **staticMaximizePixmapXPM = 0;
    static const char **staticNormalizePixmapXPM = 0;
    const char **xpm;

    // Why don't we just use/extend the enum type...

    if (staticHelpPixmapXPM != (xpm = xpmForRegion(Help)) || !staticHelpPixmap) {
        staticHelpPixmapXPM = xpm;
        staticHelpPixmap = new QPixmap(xpm);
    }
    if (staticMenuPixmapXPM != (xpm = xpmForRegion(Menu)) || !staticMenuPixmap) {
        staticMenuPixmapXPM = xpm;
        staticMenuPixmap = new QPixmap(xpm);
    }
    if (staticClosePixmapXPM != (xpm = xpmForRegion(Close)) || !staticClosePixmap) {
        staticClosePixmapXPM = xpm;
        staticClosePixmap = new QPixmap(xpm);
    }
    if (staticMinimizePixmapXPM != (xpm = xpmForRegion(Minimize)) || !staticMinimizePixmap) {
        staticMinimizePixmapXPM = xpm;
        staticMinimizePixmap = new QPixmap(xpm);
    }
    if (staticMaximizePixmapXPM != (xpm = xpmForRegion(Maximize)) || !staticMaximizePixmap) {
        staticMaximizePixmapXPM = xpm;
        staticMaximizePixmap = new QPixmap(xpm);
    }
    if (staticNormalizePixmapXPM != (xpm = xpmForRegion(Normalize)) || !staticNormalizePixmap) {
        staticNormalizePixmapXPM = xpm;
        staticNormalizePixmap = new QPixmap(xpm);
    }

    const QPixmap *pm = 0;

    switch (decorationRegion) {
        case Help:
            pm = staticHelpPixmap;
            break;
        case Menu:
            if (!widget->windowIcon().isNull())
                return widget->windowIcon().pixmap(16,16); //##### QIcon::pixmap() needs a size !!!!!!"
            if (!pm) {
                xoff = 1;
                pm = staticMenuPixmap;
            }
            break;
        case Close:
            pm = staticClosePixmap;
            break;
        case Maximize:
            pm = staticMaximizePixmap;
            break;
        case Normalize:
            pm = staticNormalizePixmap;
            break;
        case Minimize:
            pm = staticMinimizePixmap;
            break;
        default:
            break;
    }
    return *pm;
#endif
}

/*!
    \fn int QDecorationDefault::titleBarHeight(const QWidget *widget)

    Returns the title bar height in pixels for the given \a widget. It is the
    greater of 20, or the sum of the application font's line spacing value
    plus a border width fudge factor.
*/
int QDecorationDefault::titleBarHeight(const QWidget *)
{
    return qMax(20, QApplication::fontMetrics().height() + BORDER_WIDTH);
}

/*!
  Returns the region specified by \a decorationRegion for the
  top-level \a widget. \a rect specifies the rectangle the decoration
  wraps. The value of \a decorationRegion is a combination of the
  bitmask values of enum DecorationRegion.
 */
QRegion QDecorationDefault::region(const QWidget *widget,
                                   const QRect &rect,
                                   int decorationRegion)
{
    Qt::WindowFlags flags = widget->windowFlags();
    bool hasBorder = !widget->isMaximized();
    bool hasTitle = flags & Qt::WindowTitleHint;
    bool hasSysMenu = flags & Qt::WindowSystemMenuHint;
    bool hasContextHelp = flags & Qt::WindowContextHelpButtonHint;
    bool hasMinimize = flags & Qt::WindowMinimizeButtonHint;
    bool hasMaximize = flags & Qt::WindowMaximizeButtonHint;
    int state = widget->windowState();
    bool isMinimized = state & Qt::WindowMinimized;
    bool isMaximized = state & Qt::WindowMaximized;

    int titleHeight = hasTitle ? titleBarHeight(widget) : 0;
    int bw = hasBorder ? BORDER_WIDTH : 0;
    int bbw = hasBorder ? BOTTOM_BORDER_WIDTH : 0;

    QRegion region;
    switch (decorationRegion) {
        case All: {
                QRect r(rect.left() - bw,
                        rect.top() - titleHeight - bw,
                        rect.width() + 2 * bw,
                        rect.height() + titleHeight + bw + bbw);
                region = r;
                region -= rect;
            }
            break;

        case Title: {
                QRect r(rect.left()
                        + (hasSysMenu ? menu_width : 0),
                        rect.top() - titleHeight,
                        rect.width()
                        - (hasSysMenu ? menu_width : 0)
                        - close_width
                        - (hasMaximize ? maximize_width : 0)
                        - (hasMinimize ? minimize_width : 0)
                        - (hasContextHelp ? help_width : 0),

                        titleHeight);
                if (r.width() > 0)
                    region = r;
            }
            break;

        case Top: {
                QRect r(rect.left() + CORNER_GRAB,
                        rect.top() - titleHeight - bw,
                        rect.width() - 2 * CORNER_GRAB,
                        bw);
                region = r;
            }
            break;

        case Left: {
                QRect r(rect.left() - bw,
                        rect.top() - titleHeight + CORNER_GRAB,
                        bw,
                        rect.height() + titleHeight - 2 * CORNER_GRAB);
                region = r;
            }
            break;

        case Right: {
                QRect r(rect.right() + 1,
                        rect.top() - titleHeight + CORNER_GRAB,
                        bw,
                        rect.height() + titleHeight - 2 * CORNER_GRAB);
                region = r;
            }
            break;

        case Bottom: {
                QRect r(rect.left() + CORNER_GRAB,
                        rect.bottom() + 1,
                        rect.width() - 2 * CORNER_GRAB,
                        bw);
                region = r;
            }
            break;

        case TopLeft: {
                QRect r1(rect.left() - bw,
                        rect.top() - bw - titleHeight,
                        CORNER_GRAB + bw,
                        bw);

                QRect r2(rect.left() - bw,
                        rect.top() - bw - titleHeight,
                        bw,
                        CORNER_GRAB + bw);

                region = QRegion(r1) + r2;
            }
            break;

        case TopRight: {
                QRect r1(rect.right() - CORNER_GRAB,
                        rect.top() - bw - titleHeight,
                        CORNER_GRAB + bw,
                        bw);

                QRect r2(rect.right() + 1,
                        rect.top() - bw - titleHeight,
                        bw,
                        CORNER_GRAB + bw);

                region = QRegion(r1) + r2;
            }
            break;

        case BottomLeft: {
                QRect r1(rect.left() - bw,
                        rect.bottom() + 1,
                        CORNER_GRAB + bw,
                        bw);

                QRect r2(rect.left() - bw,
                        rect.bottom() - CORNER_GRAB,
                        bw,
                        CORNER_GRAB + bw);
                region = QRegion(r1) + r2;
            }
            break;

        case BottomRight: {
                QRect r1(rect.right() - CORNER_GRAB,
                        rect.bottom() + 1,
                        CORNER_GRAB + bw,
                        bw);

                QRect r2(rect.right() + 1,
                        rect.bottom() - CORNER_GRAB,
                        bw,
                        CORNER_GRAB + bw);
                region = QRegion(r1) + r2;
            }
            break;

        case Menu: {
                if (hasSysMenu) {
                    region = QRect(rect.left(), rect.top() - titleHeight,
                                   menu_width, titleHeight);
                }
            }
            break;

        case Help: {
                if (hasContextHelp) {
                    QRect r(rect.right()
                            - close_width
                            - (hasMaximize ? maximize_width : 0)
                            - (hasMinimize ? minimize_width : 0)
                            - help_width + 1, rect.top() - titleHeight,
                            help_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                }
            }
            break;


        case Minimize: {
                if (hasMinimize && !isMinimized) {
                    QRect r(rect.right() - close_width
                            - (hasMaximize ? maximize_width : 0)
                            - minimize_width + 1, rect.top() - titleHeight,
                            minimize_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                }
            }
            break;

        case Maximize: {
                if (hasMaximize && !isMaximized) {
                    QRect r(rect.right() - close_width - maximize_width + 1,
                            rect.top() - titleHeight, maximize_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                }
            }
            break;

        case Normalize: {
                if (hasMinimize && isMinimized) {
                    QRect r(rect.right() - close_width
                            - (hasMaximize ? maximize_width : 0)
                            - minimize_width + 1, rect.top() - titleHeight,
                            minimize_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                } else if (hasMaximize && isMaximized) {
                    QRect r(rect.right() - close_width - maximize_width + 1,
                            rect.top() - titleHeight, maximize_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                }
            }
            break;

        case Close: {
                QRect r(rect.right() - close_width + 1, rect.top() - titleHeight,
                        close_width, titleHeight);
                if (r.left() > rect.left() + titleHeight)
                    region = r;
            }
            break;

    default: {
        int i = 1;
        while (i) {
            if (i & decorationRegion)
                region += this->region(widget, rect, i);
            i <<= 1;
        }
    }
            break;
    }

    return region;
}

/*!
  Paints the border and title decoration for the top-level \a widget
  using the \a painter provided and the decoration \a state. The value
  of \a decorationRegion is a combination of the bitmask values of
  enum DecorationRegion.

  Note that Qt for Embedded Linux expects this function to return true if any of
  the widget's decorations are repainted; otherwise it returns false.
 */
bool QDecorationDefault::paint(QPainter *painter,
                               const QWidget *widget,
                               int decorationRegion,
                               DecorationState state)
{
    if (decorationRegion == None)
        return false;

    const QRect titleRect = QDecoration::region(widget, Title).boundingRect();
    const QPalette pal = QApplication::palette();
    int titleHeight = titleRect.height();
    int titleWidth = titleRect.width();
    QRegion oldClipRegion = painter->clipRegion();


    Qt::WindowFlags flags = widget->windowFlags();
    bool hasBorder = !widget->isMaximized();
    bool hasTitle = flags & Qt::WindowTitleHint;
    bool hasSysMenu = flags & Qt::WindowSystemMenuHint;
    bool hasContextHelp = flags & Qt::WindowContextHelpButtonHint;
    bool hasMinimize = flags & Qt::WindowMinimizeButtonHint;
    bool hasMaximize = flags & Qt::WindowMaximizeButtonHint;

    bool paintAll = (decorationRegion == int(All));
    bool handled = false;

    bool porterDuff = painter->paintEngine()->hasFeature(QPaintEngine::PorterDuff);

    if ((paintAll || decorationRegion & Borders) && state == Normal && hasBorder) {
        if (hasTitle) { // reduce flicker
            QRect rect(widget->rect());
            QRect r(rect.left(), rect.top() - titleHeight,
                    rect.width(), titleHeight);
            painter->setClipRegion(oldClipRegion - r);
        }
        QRect br = QDecoration::region(widget).boundingRect();
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_Source);
        qDrawWinPanel(painter, br.x(), br.y(), br.width(),
                    br.height(), pal, false,
                    &pal.brush(QPalette::Window));
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
        handled |= true;
    }

    if ((paintAll || decorationRegion & Title && titleWidth > 0) && state == Normal && hasTitle) {
        painter->setClipRegion(oldClipRegion);
        QBrush titleBrush;
        QPen   titlePen;

        if (widget == qApp->activeWindow()) {
            titleBrush = pal.brush(QPalette::Highlight);
            titlePen   = pal.color(QPalette::HighlightedText);
        } else {
            titleBrush = pal.brush(QPalette::Window);
            titlePen   = pal.color(QPalette::Text);
        }

        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_Source);
        qDrawShadePanel(painter,
                        titleRect.x(), titleRect.y(), titleRect.width(), titleRect.height(),
                        pal, true, 1, &titleBrush);
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_SourceOver);

        painter->setPen(titlePen);
        painter->drawText(titleRect.x() + 4, titleRect.y(),
                          titleRect.width() - 8, titleRect.height(),
                          Qt::AlignVCenter, windowTitleFor(widget));
        handled |= true;
    }

    if (state != Hover) {
        painter->setClipRegion(oldClipRegion);
        if ((paintAll || decorationRegion & Menu) && hasSysMenu) {
            paintButton(painter, widget, Menu, state, pal);
            handled |= true;
        }

        if ((paintAll || decorationRegion & Help) && hasContextHelp) {
            paintButton(painter, widget, Help, state, pal);
            handled |= true;
        }

        if ((paintAll || decorationRegion & Minimize) && hasMinimize) {
            paintButton(painter, widget, Minimize, state, pal);
            handled |= true;
        }

        if ((paintAll || decorationRegion & Maximize) && hasMaximize) {
            paintButton(painter, widget,
                        ((widget->windowState() & Qt::WindowMaximized)? Normalize : Maximize),
                        state, pal);
            handled |= true;
        }

        if (paintAll || decorationRegion & Close) {
            paintButton(painter, widget, Close, state, pal);
            handled |= true;
        }
    }
    return handled;
}

/*!
    \fn void QDecorationDefault::paintButton(QPainter *painter, const
    QWidget *widget, int buttonRegion, DecorationState state,
    const QPalette &palette)

    Paints a region of the top-level \a widget. The region is
    painted in the specified decoration \a state using the
    \a painter and \a palette provided. The region to be painted is specified
    by \a buttonRegion, which is a combination of the bitmask values of
    DecorationRegion. If the value of \a buttonRegion is one of \e Help,
    \e Menu, \e Close, \e Minimize, \e Maximize, and \e Normalize, the
    button pixmap for that region is painted.

    \sa pixmapFor()
 */
void QDecorationDefault::paintButton(QPainter *painter,
                                     const QWidget *widget,
                                     int buttonRegion,
                                     DecorationState state,
                                     const QPalette &pal)
{
    int xoff = 2;
    int yoff = 2;

    const QPixmap pm = pixmapFor(widget, buttonRegion, xoff, yoff);
    QRect brect(QDecoration::region(widget, buttonRegion).boundingRect());
    bool porterDuff = painter->paintEngine()->hasFeature(QPaintEngine::PorterDuff);

    if (state & QDecoration::Pressed) {
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_Source);
        qDrawWinPanel(painter, brect, pal, true, &pal.brush(QPalette::Window));
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
        ++xoff;
        ++yoff;
    } else {
        painter->fillRect(brect, pal.brush(QPalette::Window));
    }

    if (!pm.isNull())
        painter->drawPixmap(brect.x() + xoff, brect.y() + yoff, pm);
}

extern QString qt_setWindowTitle_helperHelper(const QString&, const QWidget*);

/*!
  \internal
 */
QString QDecorationDefault::windowTitleFor(const QWidget *widget) const
{
    return qt_setWindowTitle_helperHelper(widget->windowTitle(), widget);
}

#endif // QT_NO_QWS_DECORATION_DEFAULT

QT_END_NAMESPACE
