Qt 4.8: BrowserWindow.cpp Example File (demos/embedded/anomaly/src/BrowserWindow.cpp)

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# BrowserWindow.cpp Example File

demos/embedded/anomaly/src/BrowserWindow.cpp

     /****************************************************************************
     **
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     ** Contact: http://www.qt-project.org/legal
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     ** This file is part of the demos of the Qt Toolkit.
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     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
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     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
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     ****************************************************************************/

     #include "BrowserWindow.h"

     #include <QtCore>
     #include <QtGui>
     #include <QPropertyAnimation>
     #include <QResizeEvent>

     #include "BrowserView.h"
     #include "HomeView.h"

     BrowserWindow::BrowserWindow()
         : m_slidingSurface(new QWidget(this))
         , m_homeView(new HomeView(m_slidingSurface))
         , m_browserView(new BrowserView(m_slidingSurface))
         , m_animation(new QPropertyAnimation(this, "slideValue"))
     {
         m_slidingSurface->setAutoFillBackground(true);

         m_homeView->resize(size());

         m_browserView->resize(size());

         connect(m_homeView, SIGNAL(addressEntered(QString)), SLOT(gotoAddress(QString)));
         connect(m_homeView, SIGNAL(urlActivated(QUrl)), SLOT(navigate(QUrl)));

         connect(m_browserView, SIGNAL(menuButtonClicked()), SLOT(showHomeView()));

         m_animation->setDuration(200);
         connect(m_animation, SIGNAL(finished()), SLOT(animationFinished()));

         setSlideValue(0.0f);
     }

     void BrowserWindow::gotoAddress(const QString &address)
     {
         m_browserView->navigate(QUrl::fromUserInput(address));
         showBrowserView();
     }

     void BrowserWindow::animationFinished()
     {
         m_animation->setDirection(QAbstractAnimation::Forward);
     }

     void BrowserWindow::navigate(const QUrl &url)
     {
         m_browserView->navigate(url);
         showBrowserView();
     }

     void BrowserWindow::setSlideValue(qreal slideRatio)
     {
         // we use a ratio to handle resize corectly
         const int pos = -qRound(slideRatio * width());
         m_slidingSurface->scroll(pos - m_homeView->x(), 0);

         if (qFuzzyCompare(slideRatio, static_cast<qreal>(1.0f))) {
             m_browserView->show();
             m_homeView->hide();
         } else if (qFuzzyCompare(slideRatio, static_cast<qreal>(0.0f))) {
             m_homeView->show();
             m_browserView->hide();
         } else {
             m_browserView->show();
             m_homeView->show();
         }
     }

     qreal BrowserWindow::slideValue() const
     {
         Q_ASSERT(m_slidingSurface->x() < width());
         return static_cast<qreal>(qAbs(m_homeView->x())) / width();
     }

     void BrowserWindow::showHomeView()
     {
         m_animation->setStartValue(slideValue());
         m_animation->setEndValue(0.0f);
         m_animation->start();
         m_homeView->setFocus();
     }

     void BrowserWindow::showBrowserView()
     {
         m_animation->setStartValue(slideValue());
         m_animation->setEndValue(1.0f);
         m_animation->start();

         m_browserView->setFocus();
     }

     void BrowserWindow::keyReleaseEvent(QKeyEvent *event)
     {
         QWidget::keyReleaseEvent(event);

         if (event->key() == Qt::Key_F3) {
             if (m_animation->state() == QAbstractAnimation::Running) {
                 const QAbstractAnimation::Direction direction =  m_animation->direction() == QAbstractAnimation::Forward
                                                                  ? QAbstractAnimation::Forward
                                                                      : QAbstractAnimation::Backward;
                 m_animation->setDirection(direction);
             } else if (qFuzzyCompare(slideValue(), static_cast<qreal>(1.0f)))
                 showHomeView();
             else
                 showBrowserView();
             event->accept();
         }
     }

     void BrowserWindow::resizeEvent(QResizeEvent *event)
     {
         const QSize oldSize = event->oldSize();
         const qreal oldSlidingRatio = static_cast<qreal>(qAbs(m_homeView->x())) / oldSize.width();

         const QSize newSize = event->size();
         m_slidingSurface->resize(newSize.width() * 2, newSize.height());

         m_homeView->resize(newSize);
         m_homeView->move(0, 0);

         m_browserView->resize(newSize);
         m_browserView->move(newSize.width(), 0);

         setSlideValue(oldSlidingRatio);
     }