CTK/Libs/Widgets/ctkBasePopupWidget.cpp

/*=========================================================================

  Library:   CTK

  Copyright (c) Kitware Inc.

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      http://www.commontk.org/LICENSE

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

=========================================================================*/

// Qt includes
#include <QApplication>
#include <QDebug>
#include <QDesktopWidget>
#include <QDir>
#include <QEvent>
#include <QLabel>
#include <QLayout>
#include <QMouseEvent>
#include <QMoveEvent>
#include <QPainter>
#include <QPointer>
#include <QPropertyAnimation>
#include <QStyle>
#include <QTimer>

// CTK includes
#include "ctkBasePopupWidget_p.h"
#include "ctkWidgetsUtils.h"

// -------------------------------------------------------------------------
QGradient* duplicateGradient(const QGradient* gradient)
{
  QGradient* newGradient = 0;
  switch (gradient->type())
    {
    case QGradient::LinearGradient:
      {
      const QLinearGradient* linearGradient = static_cast<const QLinearGradient*>(gradient);
      newGradient = new QLinearGradient(linearGradient->start(), linearGradient->finalStop());
      break;
      }
    case QGradient::RadialGradient:
      {
      const QRadialGradient* radialGradient = static_cast<const QRadialGradient*>(gradient);
      newGradient = new QRadialGradient(radialGradient->center(), radialGradient->radius());
      break;
      }
    case QGradient::ConicalGradient:
      {
      const QConicalGradient* conicalGradient = static_cast<const QConicalGradient*>(gradient);
      newGradient = new QConicalGradient(conicalGradient->center(), conicalGradient->angle());
      break;
      }
    default:
      break;
    }
  if (!newGradient)
    {
    Q_ASSERT(gradient->type() != QGradient::NoGradient);
    return newGradient;
    }
  newGradient->setCoordinateMode(gradient->coordinateMode());
  newGradient->setSpread(gradient->spread());
  newGradient->setStops(gradient->stops());
  return newGradient;
}

// -------------------------------------------------------------------------
ctkBasePopupWidgetPrivate::ctkBasePopupWidgetPrivate(ctkBasePopupWidget& object)
  :q_ptr(&object)
{
  this->Effect = ctkBasePopupWidget::ScrollEffect;
  this->EffectDuration = 333; // in ms
  this->EffectAlpha = 1.;
  this->AlphaAnimation = 0;
  this->ForcedTranslucent = false;
  this->ScrollAnimation = 0;
  this->PopupPixmapWidget = 0;
  // Geometry attributes
  this->Alignment = Qt::AlignJustify | Qt::AlignBottom;
  this->Orientations = Qt::Vertical;
  this->VerticalDirection = ctkBasePopupWidget::TopToBottom;
  this->HorizontalDirection = Qt::LeftToRight;
}

// -------------------------------------------------------------------------
ctkBasePopupWidgetPrivate::~ctkBasePopupWidgetPrivate()
{
}

// -------------------------------------------------------------------------
void ctkBasePopupWidgetPrivate::init()
{
  Q_Q(ctkBasePopupWidget);
  // By default, Tooltips are shown only on active windows. In a popup widget
  // case, we sometimes aren't the active window but we still would like to
  // show the children tooltips.
  q->setAttribute(Qt::WA_AlwaysShowToolTips, true);
  //q->setAttribute(Qt::WA_MacAlwaysShowToolWindow, true);

  this->AlphaAnimation = new QPropertyAnimation(q, "effectAlpha", q);
  this->AlphaAnimation->setDuration(this->EffectDuration);
  this->AlphaAnimation->setStartValue(0.);
  this->AlphaAnimation->setEndValue(1.);
  QObject::connect(this->AlphaAnimation, SIGNAL(finished()),
                   q, SLOT(onEffectFinished()));

  this->PopupPixmapWidget = new QLabel(q, Qt::ToolTip | Qt::FramelessWindowHint);

  this->ScrollAnimation = new QPropertyAnimation(q, "effectGeometry", q);
  this->ScrollAnimation->setDuration(this->EffectDuration);
  QObject::connect(this->ScrollAnimation, SIGNAL(finished()),
                   q, SLOT(onEffectFinished()));
  QObject::connect(this->ScrollAnimation, SIGNAL(finished()),
                   this->PopupPixmapWidget, SLOT(hide()));

  q->setAnimationEffect(this->Effect);
  q->setEasingCurve(QEasingCurve::OutCubic);
  q->setBaseWidget(q->parentWidget());
}

// -------------------------------------------------------------------------
QPropertyAnimation* ctkBasePopupWidgetPrivate::currentAnimation()const
{
  return this->Effect == ctkBasePopupWidget::ScrollEffect ?
    this->ScrollAnimation : this->AlphaAnimation;
}

// -------------------------------------------------------------------------
bool ctkBasePopupWidgetPrivate::isOpening()const
{
  return this->currentAnimation()->state() == QAbstractAnimation::Running &&
    this->currentAnimation()->direction() == QAbstractAnimation::Forward;
}

// -------------------------------------------------------------------------
bool ctkBasePopupWidgetPrivate::isClosing()const
{
  return this->currentAnimation()->state() == QAbstractAnimation::Running &&
    this->currentAnimation()->direction() == QAbstractAnimation::Backward;
}

// -------------------------------------------------------------------------
bool ctkBasePopupWidgetPrivate::wasClosing()const
{
  Q_Q(const ctkBasePopupWidget);
  return qobject_cast<QAbstractAnimation*>(q->sender())->direction()
    == QAbstractAnimation::Backward;
}

// -------------------------------------------------------------------------
QWidgetList ctkBasePopupWidgetPrivate::focusWidgets(bool onlyVisible)const
{
  Q_Q(const ctkBasePopupWidget);
  QWidgetList res;
  if (!onlyVisible || q->isVisible())
    {
    res << const_cast<ctkBasePopupWidget*>(q);
    }
  if (!this->BaseWidget.isNull() && (!onlyVisible || this->BaseWidget->isVisible()))
    {
    res << this->BaseWidget;
    }
  if (this->PopupPixmapWidget && (!onlyVisible || this->PopupPixmapWidget->isVisible()))
    {
    res << this->PopupPixmapWidget;
    }
  return res;
}

// -------------------------------------------------------------------------
QWidget* ctkBasePopupWidgetPrivate::mouseOver()
{
  QList<QWidget*> widgets = this->focusWidgets(true);
  foreach(QWidget* widget, widgets)
    {
    if (widget->underMouse())
      {
      return widget;
      }
    }
  // Warning QApplication::widgetAt(QCursor::pos()) can be a bit slow...
  const QPoint pos = QCursor::pos();
  QWidget* widgetUnderCursor = qApp->widgetAt(pos);
  foreach(const QWidget* focusWidget, widgets)
    {
    if (this->isAncestorOf(focusWidget, widgetUnderCursor) &&
        // Ignore when cursor is above a title bar of a focusWidget, underMouse
        // wouldn't have return false, but QApplication::widgetAt would return
        // the widget
        (focusWidget != widgetUnderCursor ||
         QRect(QPoint(0,0), focusWidget->size()).contains(
          focusWidget->mapFromGlobal(pos))))
      {
      return widgetUnderCursor;
      }
    }
  return 0;
}

// -------------------------------------------------------------------------
bool ctkBasePopupWidgetPrivate::isAncestorOf(const QWidget* ancestor, const QWidget* child)const
{
  while (child)
    {
    if (child == ancestor)
      {
      return true;
      }
    child = child->parentWidget();
    }
  return false;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidgetPrivate::setupPopupPixmapWidget()
{
  Q_Q(ctkBasePopupWidget);
  this->PopupPixmapWidget->setAlignment(this->pixmapAlignment());
  QPixmap pixmap;
  if (q->testAttribute(Qt::WA_TranslucentBackground))
    {
    // only QImage handle transparency correctly
    QImage image(q->geometry().size(), QImage::Format_ARGB32);
    image.fill(0);
    q->render(&image);
    pixmap = QPixmap::fromImage(image);
    }
  else
    {
    pixmap = QPixmap::fromImage(
      ctk::grabWidget(q, QRect(QPoint(0,0), q->geometry().size())));
    }
  this->PopupPixmapWidget->setPixmap(pixmap);
  this->PopupPixmapWidget->setAttribute(
    Qt::WA_TranslucentBackground, q->testAttribute(Qt::WA_TranslucentBackground));
  this->PopupPixmapWidget->setWindowOpacity(q->windowOpacity());
}

// -------------------------------------------------------------------------
Qt::Alignment ctkBasePopupWidgetPrivate::pixmapAlignment()const
{
  Qt::Alignment alignment;
  if (this->VerticalDirection == ctkBasePopupWidget::TopToBottom)
    {
    alignment |= Qt::AlignBottom;
    }
  else// if (this->VerticalDirection == ctkBasePopupWidget::BottomToTop)
    {
    alignment |= Qt::AlignTop;
    }

  if (this->HorizontalDirection == Qt::LeftToRight)
    {
    alignment |= Qt::AlignRight;
    }
  else// if (this->VerticalDirection == ctkBasePopupWidget::BottomToTop)
    {
    alignment |= Qt::AlignLeft;
    }
  return alignment;
}

// -------------------------------------------------------------------------
QRect ctkBasePopupWidgetPrivate::closedGeometry()const
{
  Q_Q(const ctkBasePopupWidget);
  return this->closedGeometry(q->geometry());
}

// -------------------------------------------------------------------------
QRect ctkBasePopupWidgetPrivate::closedGeometry(QRect openGeom)const
{
  if (this->Orientations & Qt::Vertical)
    {
    if (this->VerticalDirection == ctkBasePopupWidget::BottomToTop)
      {
      openGeom.moveTop(openGeom.bottom());
      }
    openGeom.setHeight(0);
    }
  if (this->Orientations & Qt::Horizontal)
    {
    if (this->HorizontalDirection == Qt::RightToLeft)
      {
      openGeom.moveLeft(openGeom.right());
      }
    openGeom.setWidth(0);
    }
  return openGeom;
}

// -------------------------------------------------------------------------
QRect ctkBasePopupWidgetPrivate::baseGeometry()const
{
  if (this->BaseWidget.isNull())
    {
    return QRect();
    }
  return QRect(this->mapToGlobal(this->BaseWidget->geometry().topLeft()),
               this->BaseWidget->size());
}

// -------------------------------------------------------------------------
QPoint ctkBasePopupWidgetPrivate::mapToGlobal(const QPoint& baseWidgetPoint)const
{
  QPoint mappedPoint = baseWidgetPoint;
  if (!this->BaseWidget.isNull() && this->BaseWidget->parentWidget())
    {
    mappedPoint = this->BaseWidget->parentWidget()->mapToGlobal(mappedPoint);
    }
  return mappedPoint;
}

// -------------------------------------------------------------------------
QRect ctkBasePopupWidgetPrivate::desiredOpenGeometry()const
{
  return this->desiredOpenGeometry(this->baseGeometry());
}

// -------------------------------------------------------------------------
QRect ctkBasePopupWidgetPrivate::desiredOpenGeometry(QRect baseGeometry)const
{
  Q_Q(const ctkBasePopupWidget);
  QSize size = q->size();
  if (!q->testAttribute(Qt::WA_WState_Created))
    {
    size = q->sizeHint();
    }

  if (baseGeometry.isNull())
    {
    return QRect(q->pos(), size);
    }

  QRect geometry;
  if (this->Alignment & Qt::AlignJustify)
    {
    if (this->Orientations & Qt::Vertical)
      {
      size.setWidth(baseGeometry.width());
      }
    }
  if (this->Alignment & Qt::AlignTop &&
      this->Alignment & Qt::AlignBottom)
    {
    size.setHeight(baseGeometry.height());
    }

  geometry.setSize(size);

  QPoint topLeft = baseGeometry.topLeft();
  QPoint bottomRight = baseGeometry.bottomRight();

  if (this->Alignment & Qt::AlignLeft)
    {
    if (this->HorizontalDirection == Qt::LeftToRight)
      {
      geometry.moveLeft(topLeft.x());
      }
    else
      {
      geometry.moveRight(topLeft.x() - 1);
      }
    }
  else if (this->Alignment & Qt::AlignRight)
    {
    if (this->HorizontalDirection == Qt::LeftToRight)
      {
      geometry.moveLeft(bottomRight.x() + 1);
      }
    else
      {
      geometry.moveRight(bottomRight.x());
      }
    }
  else if (this->Alignment & Qt::AlignHCenter)
    {
    geometry.moveLeft((topLeft.x() + bottomRight.x()) / 2 - size.width() / 2);
    }
  else if (this->Alignment & Qt::AlignJustify)
    {
    geometry.moveLeft(topLeft.x());
    }

  if (this->Alignment & Qt::AlignTop)
    {
    if (this->VerticalDirection == ctkBasePopupWidget::TopToBottom)
      {
      geometry.moveTop(topLeft.y());
      }
    else
      {
      geometry.moveBottom(topLeft.y() - 1);
      }
    }
  else if (this->Alignment & Qt::AlignBottom)
    {
    if (this->VerticalDirection == ctkBasePopupWidget::TopToBottom)
      {
      geometry.moveTop(bottomRight.y() + 1);
      }
    else
      {
      geometry.moveBottom(bottomRight.y());
      }
    }
  else if (this->Alignment & Qt::AlignVCenter)
    {
    geometry.moveTop((topLeft.y() + bottomRight.y()) / 2 - size.height() / 2);
    }
  return geometry;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidgetPrivate::hideAll()
{
  Q_Q(ctkBasePopupWidget);

  // It is possible to have the popup widget not being a popup but inside
  // a layout: maybe the popup has been pin-down in a way that it gets parented
  // In that case, there is no reason to hide the popup.
  if (!(q->windowFlags() & PopupWindowType))
    {
    return;
    }

  // Before hiding, transfer the active window flag to its parent, this will
  // prevent the application to send a ApplicationDeactivate signal that
  // doesn't need to be done.
#ifndef Q_OS_MAC // See Slicer issue #3850
  if (q->isActiveWindow() && !this->BaseWidget.isNull())
    {
    qApp->setActiveWindow(this->BaseWidget->window());
    }
#endif

  q->hide();
  this->PopupPixmapWidget->hide();

  // If there is a popup open in the ctkBasePopupWidget children, then hide it
  // as well so we don't have a popup open while the ctkBasePopupWidget is hidden.
  QPointer<QWidget> activePopupWidget = qApp->activePopupWidget();
  if (activePopupWidget && this->isAncestorOf(q, activePopupWidget))
    {
    activePopupWidget->close();
    }
}

// -------------------------------------------------------------------------
// Qt::FramelessWindowHint is required on Windows for Translucent background
// Qt::Toolip is preferred to Qt::Popup as it would close itself at the first
// click outside the widget (typically a click in the BaseWidget)
ctkBasePopupWidget::ctkBasePopupWidget(QWidget* parentWidget)
  //: Superclass(QApplication::desktop()->screen(QApplication::desktop()->screenNumber(parentWidget)),
  : Superclass(parentWidget,
               PopupWindowType | Qt::FramelessWindowHint)
  , d_ptr(new ctkBasePopupWidgetPrivate(*this))
{
  Q_D(ctkBasePopupWidget);
  d->init();
}

// -------------------------------------------------------------------------
ctkBasePopupWidget::ctkBasePopupWidget(ctkBasePopupWidgetPrivate* pimpl, QWidget* parentWidget)
  //: //Superclass(QApplication::desktop()->screen(QApplication::desktop()->screenNumber(parentWidget)),
  : Superclass(parentWidget,
               PopupWindowType | Qt::FramelessWindowHint)
  , d_ptr(pimpl)
{
}

// -------------------------------------------------------------------------
ctkBasePopupWidget::~ctkBasePopupWidget()
{
}

// -------------------------------------------------------------------------
QWidget* ctkBasePopupWidget::baseWidget()const
{
  Q_D(const ctkBasePopupWidget);
  return d->BaseWidget;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::setBaseWidget(QWidget* widget)
{
  Q_D(ctkBasePopupWidget);
  if (!d->BaseWidget.isNull())
    {
    //disconnect(d->BaseWidget, SIGNAL(destroyed(QObject*)),
    //           this, SLOT(onBaseWidgetDestroyed()));
    }
  d->BaseWidget = widget;
  if (!d->BaseWidget.isNull())
    {
    //connect(d->BaseWidget, SIGNAL(destroyed(QObject*)),
    //        this, SLOT(onBaseWidgetDestroyed()));
    }
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::onBaseWidgetDestroyed()
{
  Q_D(ctkBasePopupWidget);
  d->hideAll();
  this->setBaseWidget(0);
  // could be a property.
  this->deleteLater();
}

// -------------------------------------------------------------------------
ctkBasePopupWidget::AnimationEffect ctkBasePopupWidget::animationEffect()const
{
  Q_D(const ctkBasePopupWidget);
  return d->Effect;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::setAnimationEffect(ctkBasePopupWidget::AnimationEffect effect)
{
  Q_D(ctkBasePopupWidget);
  /// TODO: handle the case where there is an animation running
  d->Effect = effect;
}

// -------------------------------------------------------------------------
int ctkBasePopupWidget::effectDuration()const
{
  Q_D(const ctkBasePopupWidget);
  return d->EffectDuration;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::setEffectDuration(int duration)
{
  Q_D(ctkBasePopupWidget);
  d->EffectDuration = duration;
  d->AlphaAnimation->setDuration(d->EffectDuration);
  d->ScrollAnimation->setDuration(d->EffectDuration);
}

// -------------------------------------------------------------------------
QEasingCurve::Type ctkBasePopupWidget::easingCurve()const
{
  Q_D(const ctkBasePopupWidget);
  return d->AlphaAnimation->easingCurve().type();
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::setEasingCurve(QEasingCurve::Type easingCurve)
{
  Q_D(ctkBasePopupWidget);
  d->AlphaAnimation->setEasingCurve(easingCurve);
  d->ScrollAnimation->setEasingCurve(easingCurve);
}

// -------------------------------------------------------------------------
Qt::Alignment ctkBasePopupWidget::alignment()const
{
  Q_D(const ctkBasePopupWidget);
  return d->Alignment;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::setAlignment(Qt::Alignment alignment)
{
  Q_D(ctkBasePopupWidget);
  d->Alignment = alignment;
}

// -------------------------------------------------------------------------
Qt::Orientations ctkBasePopupWidget::orientation()const
{
  Q_D(const ctkBasePopupWidget);
  return d->Orientations;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::setOrientation(Qt::Orientations orientations)
{
  Q_D(ctkBasePopupWidget);
  d->Orientations = orientations;
}

// -------------------------------------------------------------------------
ctkBasePopupWidget::VerticalDirection ctkBasePopupWidget::verticalDirection()const
{
  Q_D(const ctkBasePopupWidget);
  return d->VerticalDirection;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::setVerticalDirection(ctkBasePopupWidget::VerticalDirection verticalDirection)
{
  Q_D(ctkBasePopupWidget);
  d->VerticalDirection = verticalDirection;
}

// -------------------------------------------------------------------------
Qt::LayoutDirection ctkBasePopupWidget::horizontalDirection()const
{
  Q_D(const ctkBasePopupWidget);
  return d->HorizontalDirection;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::setHorizontalDirection(Qt::LayoutDirection horizontalDirection)
{
  Q_D(ctkBasePopupWidget);
  d->HorizontalDirection = horizontalDirection;
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::onEffectFinished()
{
  Q_D(ctkBasePopupWidget);
  if (d->ForcedTranslucent)
    {
    d->ForcedTranslucent = false;
    this->setAttribute(Qt::WA_TranslucentBackground, false);
    }
  if (d->wasClosing())
    {
    d->hideAll();
    emit this->popupOpened(false);
    }
  else
    {
    this->show();
    emit this->popupOpened(true);
    }
}

// -------------------------------------------------------------------------
bool ctkBasePopupWidget::event(QEvent* event)
{
  switch(event->type())
    {
    case QEvent::ParentChange:
      // For now the base widget is the parent widget
      this->setBaseWidget(this->parentWidget());
      break;
    default:
      break;
    }
  return this->Superclass::event(event);
}

// -------------------------------------------------------------------------
void ctkBasePopupWidget::paintEvent(QPaintEvent* event)
{
  Q_D(ctkBasePopupWidget);
  Q_UNUSED(event);

  QPainter painter(this);
  QBrush brush = this->palette().window();
  if (brush.style() == Qt::LinearGradientPattern ||
      brush.style() == Qt::ConicalGradientPattern ||
      brush.style() == Qt::RadialGradientPattern)
    {
    QGradient* newGradient = duplicateGradient(brush.gradient());
    QGradientStops stops;
    foreach(QGradientStop stop, newGradient->stops())
      {
      stop.second.setAlpha(stop.second.alpha() * d->EffectAlpha);
      stops.push_back(stop);
      }
    newGradient->setStops(stops);
    brush = QBrush(*newGradient);
    delete newGradient;
    }
  else
    {
    QColor color = brush.color();
    color.setAlpha(color.alpha() * d->EffectAlpha);
    brush.setColor(color);
    }
  //QColor semiTransparentColor = this->palette().window().color();
  //semiTransparentColor.setAlpha(d->CurrentAlpha);
  painter.fillRect(this->rect(), brush);
  painter.end();
  // Let the QFrame draw itself if needed
  this->Superclass::paintEvent(event);
}

// --------------------------------------------------------------------------
void ctkBasePopupWidget::showPopup()
{
  Q_D(ctkBasePopupWidget);

  if ((this->isVisible() &&
       d->currentAnimation()->state() == QAbstractAnimation::Stopped) ||
      (!d->BaseWidget.isNull() && !d->BaseWidget->isVisible()))
    {
    return;
    }

  // If the layout has never been activated, the widget doesn't know its
  // minSize/maxSize and we then wouldn't know what's its true geometry.
  if (this->layout() && !this->testAttribute(Qt::WA_WState_Created))
    {
    this->layout()->activate();
    }
  this->setGeometry(d->desiredOpenGeometry());
  /// Maybe the popup doesn't allow the desiredOpenGeometry if the widget
  /// minimum size is larger than the desired size.
  QRect openGeometry = this->geometry();
  QRect closedGeometry = d->closedGeometry();

  d->currentAnimation()->setDirection(QAbstractAnimation::Forward);

  switch(d->Effect)
    {
    case WindowOpacityFadeEffect:
      if (!this->testAttribute(Qt::WA_TranslucentBackground))
        {
        d->ForcedTranslucent = true;
        this->setAttribute(Qt::WA_TranslucentBackground, true);
        }
      this->show();
      break;
    case ScrollEffect:
      {
      d->PopupPixmapWidget->setGeometry(closedGeometry);
      d->ScrollAnimation->setStartValue(closedGeometry);
      d->ScrollAnimation->setEndValue(openGeometry);
      d->setupPopupPixmapWidget();
      d->PopupPixmapWidget->show();
      break;
      }
    default:
      break;
    }
  switch(d->currentAnimation()->state())
    {
    case QAbstractAnimation::Stopped:
      d->currentAnimation()->start();
      break;
    case QAbstractAnimation::Paused:
      d->currentAnimation()->resume();
      break;
    default:
    case QAbstractAnimation::Running:
      break;
    }
}

// --------------------------------------------------------------------------
void ctkBasePopupWidget::hidePopup()
{
  Q_D(ctkBasePopupWidget);

  if (!this->isVisible() &&
      d->currentAnimation()->state() == QAbstractAnimation::Stopped)
    {
    return;
    }
  d->currentAnimation()->setDirection(QAbstractAnimation::Backward);

  QRect openGeometry = this->geometry();
  QRect closedGeometry = d->closedGeometry();

  switch(d->Effect)
    {
    case WindowOpacityFadeEffect:
      if (!this->testAttribute(Qt::WA_TranslucentBackground))
        {
        d->ForcedTranslucent = true;
        this->setAttribute(Qt::WA_TranslucentBackground, true);
        }
      break;
    case ScrollEffect:
      {
      d->ScrollAnimation->setStartValue(closedGeometry);
      d->ScrollAnimation->setEndValue(openGeometry);
      d->setupPopupPixmapWidget();
      d->PopupPixmapWidget->setGeometry(this->geometry());
      d->PopupPixmapWidget->show();
      if (this->isActiveWindow())
        {
        qApp->setActiveWindow(!d->BaseWidget.isNull() ? d->BaseWidget->window() : 0);
        }
      this->hide();
      break;
      }
    default:
      break;
    }
  switch(d->currentAnimation()->state())
    {
    case QAbstractAnimation::Stopped:
      d->currentAnimation()->start();
      break;
    case QAbstractAnimation::Paused:
      d->currentAnimation()->resume();
      break;
    default:
    case QAbstractAnimation::Running:
      break;
    }
}

// --------------------------------------------------------------------------
double ctkBasePopupWidget::effectAlpha()const
{
  Q_D(const ctkBasePopupWidget);
  return d->EffectAlpha;
}

// --------------------------------------------------------------------------
void ctkBasePopupWidget::setEffectAlpha(double alpha)
{
  Q_D(ctkBasePopupWidget);
  d->EffectAlpha = alpha;
  this->repaint();
}

// --------------------------------------------------------------------------
QRect ctkBasePopupWidget::effectGeometry()const
{
  Q_D(const ctkBasePopupWidget);
  return d->PopupPixmapWidget->geometry();
}

// --------------------------------------------------------------------------
void ctkBasePopupWidget::setEffectGeometry(QRect newGeometry)
{
  Q_D(ctkBasePopupWidget);
  d->PopupPixmapWidget->setGeometry(newGeometry);
  d->PopupPixmapWidget->repaint();
}