Qt 5.6 | Qt Widgets | Main Window | colorswatch.cpp Example File

Qt 5.6.2 Reference Documentation

# colorswatch.cpp Example File

mainwindows/mainwindow/colorswatch.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the demonstration applications of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
      ** 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
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      ** information use the contact form at http://www.qt.io/contact-us.
      **
      ** 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 or version 3 as published by the Free
      ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
      ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
      ** following information to ensure the GNU Lesser General Public License
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      ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
      **
      ** As a special exception, The Qt Company gives you certain additional
      ** rights. These rights are described in The Qt Company LGPL Exception
      ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #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).light(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 Q_DECL_OVERRIDE { return szHint; }
          QSize minimumSizeHint() const Q_DECL_OVERRIDE { return minSzHint; }

          void setCustomSizeHint(const QSize &size);

      public slots:
          void changeSizeHints();

      protected:
          void paintEvent(QPaintEvent *) Q_DECL_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::reject);

          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();
          QList<ColorSwatch*> dock_list = mainWindow->findChildren<ColorSwatch*>();
          foreach (ColorSwatch *dock, dock_list) {
              tabMenu->addAction(dock->objectName());
              splitHMenu->addAction(dock->objectName());
              splitVMenu->addAction(dock->objectName());
          }
      }

      static ColorSwatch *findByName(const QMainWindow *mainWindow, const QString &name)
      {
          foreach (ColorSwatch *dock, mainWindow->findChildren<ColorSwatch*>()) {
              if (name == dock->objectName())
                  return dock;
          }
          return Q_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);
      }

      void ColorSwatch::contextMenuEvent(QContextMenuEvent *event)
      {
          event->accept();
          menu->exec(event->globalPos());
      }

      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 != 0);
          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 != 0);

          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 != 0);

          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 != 0);

          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"