/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "colorswatch.h"

#include <QAction>
#include <QtEvents>
#include <QFrame>
#include <QMainWindow>
#include <QMenu>
#include <QPainter>
#include <QImage>
#include <QColor>
#include <QDialog>
#include <QDialogButtonBox>
#include <QGridLayout>
#include <QSignalBlocker>
#include <QSpinBox>
#include <QLabel>
#include <QPainterPath>
#include <QPushButton>
#include <QHBoxLayout>
#include <QBitmap>
#include <QtDebug>

#undef DEBUG_SIZEHINTS

QColor bgColorForName(const QString &name)
{
    if (name == "Black")
        return QColor("#D8D8D8");
    if (name == "White")
        return QColor("#F1F1F1");
    if (name == "Red")
        return QColor("#F1D8D8");
    if (name == "Green")
        return QColor("#D8E4D8");
    if (name == "Blue")
        return QColor("#D8D8F1");
    if (name == "Yellow")
        return QColor("#F1F0D8");
    return QColor(name).lighter(110);
}

QColor fgColorForName(const QString &name)
{
    if (name == "Black")
        return QColor("#6C6C6C");
    if (name == "White")
        return QColor("#F8F8F8");
    if (name == "Red")
        return QColor("#F86C6C");
    if (name == "Green")
        return QColor("#6CB26C");
    if (name == "Blue")
        return QColor("#6C6CF8");
    if (name == "Yellow")
        return QColor("#F8F76C");
    return QColor(name);
}

class ColorDock : public QFrame
{
    Q_OBJECT
public:
    explicit ColorDock(const QString &c, QWidget *parent);

    QSize sizeHint() const override { return szHint; }
    QSize minimumSizeHint() const override { return minSzHint; }

    void setCustomSizeHint(const QSize &size);

public slots:
    void changeSizeHints();

protected:
    void paintEvent(QPaintEvent *) override;

private:
    const QString color;
    QSize szHint;
    QSize minSzHint;
};

ColorDock::ColorDock(const QString &c, QWidget *parent)
    : QFrame(parent)
    , color(c)
    , szHint(-1, -1)
    , minSzHint(125, 75)
{
    QFont font = this->font();
    font.setPointSize(8);
    setFont(font);
}

void ColorDock::paintEvent(QPaintEvent *)
{
    QPainter p(this);
    p.setRenderHint(QPainter::Antialiasing);
    p.fillRect(rect(), bgColorForName(color));

    p.save();

    extern void render_qt_text(QPainter *, int, int, const QColor &);
    render_qt_text(&p, width(), height(), fgColorForName(color));

    p.restore();

#ifdef DEBUG_SIZEHINTS
    p.setRenderHint(QPainter::Antialiasing, false);

    QSize sz = size();
    QSize szHint = sizeHint();
    QSize minSzHint = minimumSizeHint();
    QSize maxSz = maximumSize();
    QString text = QString::fromLatin1("sz: %1x%2\nszHint: %3x%4\nminSzHint: %5x%6\n"
                                        "maxSz: %8x%9")
                    .arg(sz.width()).arg(sz.height())
                    .arg(szHint.width()).arg(szHint.height())
                    .arg(minSzHint.width()).arg(minSzHint.height())
                    .arg(maxSz.width()).arg(maxSz.height());

    QRect r = fontMetrics().boundingRect(rect(), Qt::AlignLeft|Qt::AlignTop, text);
    r.adjust(-2, -2, 1, 1);
    p.translate(4, 4);
    QColor bg = Qt::yellow;
    bg.setAlpha(120);
    p.setBrush(bg);
    p.setPen(Qt::black);
    p.drawRect(r);
    p.drawText(rect(), Qt::AlignLeft|Qt::AlignTop, text);
#endif // DEBUG_SIZEHINTS
}

static QSpinBox *createSpinBox(int value, QWidget *parent, int max = 1000)
{
    QSpinBox *result = new QSpinBox(parent);
    result->setMinimum(-1);
    result->setMaximum(max);
    result->setValue(value);
    return result;
}

void ColorDock::changeSizeHints()
{
    QDialog dialog(this);
    dialog.setWindowFlags(dialog.windowFlags() & ~Qt::WindowContextHelpButtonHint);
    dialog.setWindowTitle(color);

    QVBoxLayout *topLayout = new QVBoxLayout(&dialog);

    QGridLayout *inputLayout = new QGridLayout();
    topLayout->addLayout(inputLayout);

    inputLayout->addWidget(new QLabel(tr("Size Hint:"), &dialog), 0, 0);
    inputLayout->addWidget(new QLabel(tr("Min Size Hint:"), &dialog), 1, 0);
    inputLayout->addWidget(new QLabel(tr("Max Size:"), &dialog), 2, 0);
    inputLayout->addWidget(new QLabel(tr("Dock Widget Max Size:"), &dialog), 3, 0);

    QSpinBox *szHintW = createSpinBox(szHint.width(), &dialog);
    inputLayout->addWidget(szHintW, 0, 1);
    QSpinBox *szHintH = createSpinBox(szHint.height(), &dialog);
    inputLayout->addWidget(szHintH, 0, 2);

    QSpinBox *minSzHintW = createSpinBox(minSzHint.width(), &dialog);
    inputLayout->addWidget(minSzHintW, 1, 1);
    QSpinBox *minSzHintH = createSpinBox(minSzHint.height(), &dialog);
    inputLayout->addWidget(minSzHintH, 1, 2);

    QSize maxSz = maximumSize();
    QSpinBox *maxSzW = createSpinBox(maxSz.width(), &dialog, QWIDGETSIZE_MAX);
    inputLayout->addWidget(maxSzW, 2, 1);
    QSpinBox *maxSzH = createSpinBox(maxSz.height(), &dialog, QWIDGETSIZE_MAX);
    inputLayout->addWidget(maxSzH, 2, 2);

    QSize dwMaxSz = parentWidget()->maximumSize();
    QSpinBox *dwMaxSzW = createSpinBox(dwMaxSz.width(), &dialog, QWIDGETSIZE_MAX);
    inputLayout->addWidget(dwMaxSzW, 3, 1);
    QSpinBox *dwMaxSzH = createSpinBox(dwMaxSz.height(), &dialog, QWIDGETSIZE_MAX);
    inputLayout->addWidget(dwMaxSzH, 3, 2);

    inputLayout->setColumnStretch(1, 1);
    inputLayout->setColumnStretch(2, 1);

    topLayout->addStretch();

    QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, this);
    connect(buttonBox, &QDialogButtonBox::rejected, &dialog, &QDialog::reject);
    connect(buttonBox, &QDialogButtonBox::accepted, &dialog, &QDialog::accept);

    topLayout->addWidget(buttonBox);

    if (dialog.exec() != QDialog::Accepted)
        return;

    szHint = QSize(szHintW->value(), szHintH->value());
    minSzHint = QSize(minSzHintW->value(), minSzHintH->value());
    maxSz = QSize(maxSzW->value(), maxSzH->value());
    setMaximumSize(maxSz);
    dwMaxSz = QSize(dwMaxSzW->value(), dwMaxSzH->value());
    parentWidget()->setMaximumSize(dwMaxSz);
    updateGeometry();
    update();
}

void ColorDock::setCustomSizeHint(const QSize &size)
{
    if (szHint != size) {
        szHint = size;
        updateGeometry();
    }
}

ColorSwatch::ColorSwatch(const QString &colorName, QMainWindow *parent, Qt::WindowFlags flags)
    : QDockWidget(parent, flags), mainWindow(parent)
{
    setObjectName(colorName + QLatin1String(" Dock Widget"));
    setWindowTitle(objectName() + QLatin1String(" [*]"));

    ColorDock *swatch = new ColorDock(colorName, this);
    swatch->setFrameStyle(QFrame::Box | QFrame::Sunken);

    setWidget(swatch);

    closableAction = new QAction(tr("Closable"), this);
    closableAction->setCheckable(true);
    connect(closableAction, &QAction::triggered, this, &ColorSwatch::changeClosable);

    movableAction = new QAction(tr("Movable"), this);
    movableAction->setCheckable(true);
    connect(movableAction, &QAction::triggered, this, &ColorSwatch::changeMovable);

    floatableAction = new QAction(tr("Floatable"), this);
    floatableAction->setCheckable(true);
    connect(floatableAction, &QAction::triggered, this, &ColorSwatch::changeFloatable);

    verticalTitleBarAction = new QAction(tr("Vertical title bar"), this);
    verticalTitleBarAction->setCheckable(true);
    connect(verticalTitleBarAction, &QAction::triggered,
            this, &ColorSwatch::changeVerticalTitleBar);

    floatingAction = new QAction(tr("Floating"), this);
    floatingAction->setCheckable(true);
    connect(floatingAction, &QAction::triggered, this, &ColorSwatch::changeFloating);

    allowedAreasActions = new QActionGroup(this);
    allowedAreasActions->setExclusive(false);

    allowLeftAction = new QAction(tr("Allow on Left"), this);
    allowLeftAction->setCheckable(true);
    connect(allowLeftAction, &QAction::triggered, this, &ColorSwatch::allowLeft);

    allowRightAction = new QAction(tr("Allow on Right"), this);
    allowRightAction->setCheckable(true);
    connect(allowRightAction, &QAction::triggered, this, &ColorSwatch::allowRight);

    allowTopAction = new QAction(tr("Allow on Top"), this);
    allowTopAction->setCheckable(true);
    connect(allowTopAction, &QAction::triggered, this, &ColorSwatch::allowTop);

    allowBottomAction = new QAction(tr("Allow on Bottom"), this);
    allowBottomAction->setCheckable(true);
    connect(allowBottomAction, &QAction::triggered, this, &ColorSwatch::allowBottom);

    allowedAreasActions->addAction(allowLeftAction);
    allowedAreasActions->addAction(allowRightAction);
    allowedAreasActions->addAction(allowTopAction);
    allowedAreasActions->addAction(allowBottomAction);

    areaActions = new QActionGroup(this);
    areaActions->setExclusive(true);

    leftAction = new QAction(tr("Place on Left") , this);
    leftAction->setCheckable(true);
    connect(leftAction, &QAction::triggered, this, &ColorSwatch::placeLeft);

    rightAction = new QAction(tr("Place on Right") , this);
    rightAction->setCheckable(true);
    connect(rightAction, &QAction::triggered, this, &ColorSwatch::placeRight);

    topAction = new QAction(tr("Place on Top") , this);
    topAction->setCheckable(true);
    connect(topAction, &QAction::triggered, this, &ColorSwatch::placeTop);

    bottomAction = new QAction(tr("Place on Bottom") , this);
    bottomAction->setCheckable(true);
    connect(bottomAction, &QAction::triggered, this, &ColorSwatch::placeBottom);

    areaActions->addAction(leftAction);
    areaActions->addAction(rightAction);
    areaActions->addAction(topAction);
    areaActions->addAction(bottomAction);

    connect(movableAction, &QAction::triggered, areaActions, &QActionGroup::setEnabled);

    connect(movableAction, &QAction::triggered, allowedAreasActions, &QActionGroup::setEnabled);

    connect(floatableAction, &QAction::triggered, floatingAction, &QAction::setEnabled);

    connect(floatingAction, &QAction::triggered, floatableAction, &QAction::setDisabled);
    connect(movableAction, &QAction::triggered, floatableAction, &QAction::setEnabled);

    tabMenu = new QMenu(this);
    tabMenu->setTitle(tr("Tab into"));
    connect(tabMenu, &QMenu::triggered, this, &ColorSwatch::tabInto);

    splitHMenu = new QMenu(this);
    splitHMenu->setTitle(tr("Split horizontally into"));
    connect(splitHMenu, &QMenu::triggered, this, &ColorSwatch::splitInto);

    splitVMenu = new QMenu(this);
    splitVMenu->setTitle(tr("Split vertically into"));
    connect(splitVMenu, &QMenu::triggered, this, &ColorSwatch::splitInto);

    QAction *windowModifiedAction = new QAction(tr("Modified"), this);
    windowModifiedAction->setCheckable(true);
    windowModifiedAction->setChecked(false);
    connect(windowModifiedAction, &QAction::toggled, this, &QWidget::setWindowModified);

    menu = new QMenu(colorName, this);
    menu->addAction(toggleViewAction());
    menu->addAction(tr("Raise"), this, &QWidget::raise);
    menu->addAction(tr("Change Size Hints..."), swatch, &ColorDock::changeSizeHints);

    menu->addSeparator();
    menu->addAction(closableAction);
    menu->addAction(movableAction);
    menu->addAction(floatableAction);
    menu->addAction(floatingAction);
    menu->addAction(verticalTitleBarAction);
    menu->addSeparator();
    menu->addActions(allowedAreasActions->actions());
    menu->addSeparator();
    menu->addActions(areaActions->actions());
    menu->addSeparator();
    menu->addMenu(splitHMenu);
    menu->addMenu(splitVMenu);
    menu->addMenu(tabMenu);
    menu->addSeparator();
    menu->addAction(windowModifiedAction);

    connect(menu, &QMenu::aboutToShow, this, &ColorSwatch::updateContextMenu);

    if (colorName == QLatin1String("Black")) {
        leftAction->setShortcut(Qt::CTRL | Qt::Key_W);
        rightAction->setShortcut(Qt::CTRL | Qt::Key_E);
        toggleViewAction()->setShortcut(Qt::CTRL | Qt::Key_R);
    }
}

void ColorSwatch::updateContextMenu()
{
    const Qt::DockWidgetArea area = mainWindow->dockWidgetArea(this);
    const Qt::DockWidgetAreas areas = allowedAreas();

    closableAction->setChecked(features() & QDockWidget::DockWidgetClosable);
    if (windowType() == Qt::Drawer) {
        floatableAction->setEnabled(false);
        floatingAction->setEnabled(false);
        movableAction->setEnabled(false);
        verticalTitleBarAction->setChecked(false);
    } else {
        floatableAction->setChecked(features() & QDockWidget::DockWidgetFloatable);
        floatingAction->setChecked(isWindow());
        // done after floating, to get 'floatable' correctly initialized
        movableAction->setChecked(features() & QDockWidget::DockWidgetMovable);
        verticalTitleBarAction
            ->setChecked(features() & QDockWidget::DockWidgetVerticalTitleBar);
    }

    allowLeftAction->setChecked(isAreaAllowed(Qt::LeftDockWidgetArea));
    allowRightAction->setChecked(isAreaAllowed(Qt::RightDockWidgetArea));
    allowTopAction->setChecked(isAreaAllowed(Qt::TopDockWidgetArea));
    allowBottomAction->setChecked(isAreaAllowed(Qt::BottomDockWidgetArea));

    if (allowedAreasActions->isEnabled()) {
        allowLeftAction->setEnabled(area != Qt::LeftDockWidgetArea);
        allowRightAction->setEnabled(area != Qt::RightDockWidgetArea);
        allowTopAction->setEnabled(area != Qt::TopDockWidgetArea);
        allowBottomAction->setEnabled(area != Qt::BottomDockWidgetArea);
    }

    {
        const QSignalBlocker blocker(leftAction);
        leftAction->setChecked(area == Qt::LeftDockWidgetArea);
    }
    {
        const QSignalBlocker blocker(rightAction);
        rightAction->setChecked(area == Qt::RightDockWidgetArea);
    }
    {
        const QSignalBlocker blocker(topAction);
        topAction->setChecked(area == Qt::TopDockWidgetArea);
    }
    {
        const QSignalBlocker blocker(bottomAction);
        bottomAction->setChecked(area == Qt::BottomDockWidgetArea);
    }

    if (areaActions->isEnabled()) {
        leftAction->setEnabled(areas & Qt::LeftDockWidgetArea);
        rightAction->setEnabled(areas & Qt::RightDockWidgetArea);
        topAction->setEnabled(areas & Qt::TopDockWidgetArea);
        bottomAction->setEnabled(areas & Qt::BottomDockWidgetArea);
    }

    tabMenu->clear();
    splitHMenu->clear();
    splitVMenu->clear();
    const QList<ColorSwatch *> dockList = mainWindow->findChildren<ColorSwatch*>();
    for (const ColorSwatch *dock : dockList) {
        tabMenu->addAction(dock->objectName());
        splitHMenu->addAction(dock->objectName());
        splitVMenu->addAction(dock->objectName());
    }
}

static ColorSwatch *findByName(const QMainWindow *mainWindow, const QString &name)
{
    const QList<ColorSwatch *> dockList = mainWindow->findChildren<ColorSwatch*>();
    for (ColorSwatch *dock : dockList) {
        if (name == dock->objectName())
            return dock;
    }
    return nullptr;
}

void ColorSwatch::splitInto(QAction *action)
{
    ColorSwatch *target = findByName(mainWindow, action->text());
    if (!target)
        return;

    const Qt::Orientation o = action->parent() == splitHMenu
        ? Qt::Horizontal : Qt::Vertical;
    mainWindow->splitDockWidget(target, this, o);
}

void ColorSwatch::tabInto(QAction *action)
{
    if (ColorSwatch *target = findByName(mainWindow, action->text()))
        mainWindow->tabifyDockWidget(target, this);
}

#ifndef QT_NO_CONTEXTMENU
void ColorSwatch::contextMenuEvent(QContextMenuEvent *event)
{
    event->accept();
    menu->exec(event->globalPos());
}
#endif // QT_NO_CONTEXTMENU

void ColorSwatch::resizeEvent(QResizeEvent *e)
{
    if (BlueTitleBar *btb = qobject_cast<BlueTitleBar*>(titleBarWidget()))
        btb->updateMask();

    QDockWidget::resizeEvent(e);
}

void ColorSwatch::allow(Qt::DockWidgetArea area, bool a)
{
    Qt::DockWidgetAreas areas = allowedAreas();
    areas = a ? areas | area : areas & ~area;
    setAllowedAreas(areas);

    if (areaActions->isEnabled()) {
        leftAction->setEnabled(areas & Qt::LeftDockWidgetArea);
        rightAction->setEnabled(areas & Qt::RightDockWidgetArea);
        topAction->setEnabled(areas & Qt::TopDockWidgetArea);
        bottomAction->setEnabled(areas & Qt::BottomDockWidgetArea);
    }
}

void ColorSwatch::place(Qt::DockWidgetArea area, bool p)
{
    if (!p)
        return;

    mainWindow->addDockWidget(area, this);

    if (allowedAreasActions->isEnabled()) {
        allowLeftAction->setEnabled(area != Qt::LeftDockWidgetArea);
        allowRightAction->setEnabled(area != Qt::RightDockWidgetArea);
        allowTopAction->setEnabled(area != Qt::TopDockWidgetArea);
        allowBottomAction->setEnabled(area != Qt::BottomDockWidgetArea);
    }
}

void ColorSwatch::setCustomSizeHint(const QSize &size)
{
    if (ColorDock *dock = qobject_cast<ColorDock*>(widget()))
        dock->setCustomSizeHint(size);
}

void ColorSwatch::changeClosable(bool on)
{ setFeatures(on ? features() | DockWidgetClosable : features() & ~DockWidgetClosable); }

void ColorSwatch::changeMovable(bool on)
{ setFeatures(on ? features() | DockWidgetMovable : features() & ~DockWidgetMovable); }

void ColorSwatch::changeFloatable(bool on)
{ setFeatures(on ? features() | DockWidgetFloatable : features() & ~DockWidgetFloatable); }

void ColorSwatch::changeFloating(bool floating)
{ setFloating(floating); }

void ColorSwatch::allowLeft(bool a)
{ allow(Qt::LeftDockWidgetArea, a); }

void ColorSwatch::allowRight(bool a)
{ allow(Qt::RightDockWidgetArea, a); }

void ColorSwatch::allowTop(bool a)
{ allow(Qt::TopDockWidgetArea, a); }

void ColorSwatch::allowBottom(bool a)
{ allow(Qt::BottomDockWidgetArea, a); }

void ColorSwatch::placeLeft(bool p)
{ place(Qt::LeftDockWidgetArea, p); }

void ColorSwatch::placeRight(bool p)
{ place(Qt::RightDockWidgetArea, p); }

void ColorSwatch::placeTop(bool p)
{ place(Qt::TopDockWidgetArea, p); }

void ColorSwatch::placeBottom(bool p)
{ place(Qt::BottomDockWidgetArea, p); }

void ColorSwatch::changeVerticalTitleBar(bool on)
{
    setFeatures(on ? features() | DockWidgetVerticalTitleBar
                    : features() & ~DockWidgetVerticalTitleBar);
}

QSize BlueTitleBar::minimumSizeHint() const
{
    QDockWidget *dw = qobject_cast<QDockWidget*>(parentWidget());
    Q_ASSERT(dw);
    QSize result(leftPm.width() + rightPm.width(), centerPm.height());
    if (dw->features() & QDockWidget::DockWidgetVerticalTitleBar)
        result.transpose();
    return result;
}

BlueTitleBar::BlueTitleBar(QWidget *parent)
    : QWidget(parent)
    , leftPm(QPixmap(":/res/titlebarLeft.png"))
    , centerPm(QPixmap(":/res/titlebarCenter.png"))
    , rightPm(QPixmap(":/res/titlebarRight.png"))
{
}

void BlueTitleBar::paintEvent(QPaintEvent*)
{
    QPainter painter(this);
    QRect rect = this->rect();

    QDockWidget *dw = qobject_cast<QDockWidget*>(parentWidget());
    Q_ASSERT(dw);

    if (dw->features() & QDockWidget::DockWidgetVerticalTitleBar) {
        QSize s = rect.size();
        s.transpose();
        rect.setSize(s);

        painter.translate(rect.left(), rect.top() + rect.width());
        painter.rotate(-90);
        painter.translate(-rect.left(), -rect.top());
    }

    painter.drawPixmap(rect.topLeft(), leftPm);
    painter.drawPixmap(rect.topRight() - QPoint(rightPm.width() - 1, 0), rightPm);
    QBrush brush(centerPm);
    painter.fillRect(rect.left() + leftPm.width(), rect.top(),
                        rect.width() - leftPm.width() - rightPm.width(),
                        centerPm.height(), centerPm);
}

void BlueTitleBar::mouseReleaseEvent(QMouseEvent *event)
{
    QPoint pos = event->pos();

    QRect rect = this->rect();

    QDockWidget *dw = qobject_cast<QDockWidget*>(parentWidget());
    Q_ASSERT(dw);

    if (dw->features() & QDockWidget::DockWidgetVerticalTitleBar) {
        QPoint p = pos;
        pos.setX(rect.left() + rect.bottom() - p.y());
        pos.setY(rect.top() + p.x() - rect.left());

        QSize s = rect.size();
        s.transpose();
        rect.setSize(s);
    }

    const int buttonRight = 7;
    const int buttonWidth = 20;
    int right = rect.right() - pos.x();
    int button = (right - buttonRight)/buttonWidth;
    switch (button) {
        case 0:
            event->accept();
            dw->close();
            break;
        case 1:
            event->accept();
            dw->setFloating(!dw->isFloating());
            break;
        case 2: {
            event->accept();
            QDockWidget::DockWidgetFeatures features = dw->features();
            if (features & QDockWidget::DockWidgetVerticalTitleBar)
                features &= ~QDockWidget::DockWidgetVerticalTitleBar;
            else
                features |= QDockWidget::DockWidgetVerticalTitleBar;
            dw->setFeatures(features);
            break;
        }
        default:
            event->ignore();
            break;
    }
}

void BlueTitleBar::updateMask()
{
    QDockWidget *dw = qobject_cast<QDockWidget*>(parent());
    Q_ASSERT(dw);

    QRect rect = dw->rect();
    QPixmap bitmap(dw->size());

    {
        QPainter painter(&bitmap);

        // initialize to transparent
        painter.fillRect(rect, Qt::color0);

        QRect contents = rect;
        contents.setTopLeft(geometry().bottomLeft());
        contents.setRight(geometry().right());
        contents.setBottom(contents.bottom()-y());
        painter.fillRect(contents, Qt::color1);

        // let's paint the titlebar
        QRect titleRect = this->geometry();

        if (dw->features() & QDockWidget::DockWidgetVerticalTitleBar) {
            QSize s = rect.size();
            s.transpose();
            rect.setSize(s);

            QSize s2 = size();
            s2.transpose();
            titleRect.setSize(s2);

            painter.translate(rect.left(), rect.top() + rect.width());
            painter.rotate(-90);
            painter.translate(-rect.left(), -rect.top());
        }

        contents.setTopLeft(titleRect.bottomLeft());
        contents.setRight(titleRect.right());
        contents.setBottom(rect.bottom()-y());

        QRect rect = titleRect;

        painter.drawPixmap(rect.topLeft(), leftPm.mask());
        painter.fillRect(rect.left() + leftPm.width(), rect.top(),
            rect.width() - leftPm.width() - rightPm.width(),
            centerPm.height(), Qt::color1);
        painter.drawPixmap(rect.topRight() - QPoint(rightPm.width() - 1, 0), rightPm.mask());

        painter.fillRect(contents, Qt::color1);
    }

    dw->setMask(bitmap);
}

#include "colorswatch.moc"
