1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the test suite of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

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    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "imageitem.h"

    45 #include "gestures.h"

    46 #include "mousepangesturerecognizer.h"

    47 

    48 class GraphicsView : public QGraphicsView

    49 {

    50 public:

    51     GraphicsView(QGraphicsScene *scene, QWidget *parent = 0)

    52         : QGraphicsView(scene, parent)

    53     {

    54     }

    55 protected:

    56     bool viewportEvent(QEvent *event)

    57     {

    58         if (event->type() == QEvent::Gesture) {

    59             QGestureEvent *ge = static_cast<QGestureEvent *>(event);

    60             if (QPanGesture *pan = static_cast<QPanGesture *>(ge->gesture(Qt::PanGesture))) {

    61                 switch (pan->state()) {

    62                 case Qt::GestureStarted: qDebug("view: Pan: started"); break;

    63                 case Qt::GestureFinished: qDebug("view: Pan: finished"); break;

    64                 case Qt::GestureCanceled: qDebug("view: Pan: canceled"); break;

    65                 case Qt::GestureUpdated: break;

    66                 default: qDebug("view: Pan: <unknown state>"); break;

    67                 }

    68 

    69                 const QPointF offset = pan->offset();

    70                 QScrollBar *vbar = verticalScrollBar();

    71                 QScrollBar *hbar = horizontalScrollBar();

    72                 vbar->setValue(vbar->value() - offset.y());

    73                 hbar->setValue(hbar->value() - offset.x());

    74                 ge->accept(pan);

    75                 return true;

    76             }

    77         }

    78         return QGraphicsView::viewportEvent(event);

    79     }

    80 };

    81 

    82 class StandardGestures : public QWidget

    83 {

    84 public:

    85     StandardGestures(QWidget *parent = 0)

    86             : QWidget(parent)

    87     {

    88         scene = new QGraphicsScene(this);

    89         scene->setSceneRect(-2000, -2000, 4000, 4000);

    90         view = new QGraphicsView(scene, 0);

    91         QVBoxLayout *l = new QVBoxLayout(this);

    92         l->addWidget(view);

    93     }

    94 

    95     QGraphicsScene *scene;

    96     QGraphicsView *view;

    97 };

    98 

    99 class GlobalViewGestures : public QWidget

   100 {

   101     Q_OBJECT

   102 public:

   103     GlobalViewGestures(QWidget *parent = 0)

   104             : QWidget(parent)

   105     {

   106         scene = new QGraphicsScene(this);

   107         scene->setSceneRect(-2000, -2000, 4000, 4000);

   108         view = new GraphicsView(scene, 0);

   109         view->viewport()->grabGesture(Qt::PanGesture);

   110         view->viewport()->grabGesture(ThreeFingerSlideGesture::Type);

   111         QVBoxLayout *l = new QVBoxLayout(this);

   112         l->addWidget(view);

   113     }

   114 

   115     QGraphicsScene *scene;

   116     QGraphicsView *view;

   117 };

   118 

   119 class GraphicsItemGestures : public QWidget

   120 {

   121     Q_OBJECT

   122 public:

   123     GraphicsItemGestures(QWidget *parent = 0)

   124             : QWidget(parent)

   125     {

   126         scene = new QGraphicsScene(this);

   127         scene->setSceneRect(-2000, -2000, 4000, 4000);

   128         view = new QGraphicsView(scene, 0);

   129         view->viewport()->grabGesture(Qt::PanGesture);

   130         view->viewport()->grabGesture(ThreeFingerSlideGesture::Type);

   131         QVBoxLayout *l = new QVBoxLayout(this);

   132         l->addWidget(view);

   133     }

   134 

   135     QGraphicsScene *scene;

   136     QGraphicsView *view;

   137 };

   138 

   139 class MainWindow : public QMainWindow

   140 {

   141 public:

   142     MainWindow();

   143 

   144     void setDirectory(const QString &path);

   145 

   146 private:

   147     QTabWidget *tabWidget;

   148     StandardGestures *standardGestures;

   149     GlobalViewGestures *globalViewGestures;

   150     GraphicsItemGestures *graphicsItemGestures;

   151 };

   152 

   153 MainWindow::MainWindow()

   154 {

   155     (void)qApp->registerGestureRecognizer(new MousePanGestureRecognizer);

   156     ThreeFingerSlideGesture::Type = qApp->registerGestureRecognizer(new ThreeFingerSlideGestureRecognizer);

   157 

   158     tabWidget = new QTabWidget;

   159 

   160     standardGestures = new StandardGestures;

   161     tabWidget->addTab(standardGestures, "Standard gestures");

   162 

   163     globalViewGestures = new GlobalViewGestures;

   164     tabWidget->addTab(globalViewGestures , "Global gestures");

   165 

   166     graphicsItemGestures = new GraphicsItemGestures;

   167     tabWidget->addTab(graphicsItemGestures, "Graphics item gestures");

   168 

   169     setCentralWidget(tabWidget);

   170 }

   171 

   172 void MainWindow::setDirectory(const QString &path)

   173 {

   174     QDir dir(path);

   175     QStringList files = dir.entryList(QDir::Files | QDir::Readable | QDir::NoDotAndDotDot);

   176     foreach(const QString &file, files) {

   177         QImageReader img(path + QLatin1String("/")+file);

   178         QImage image = img.read();

   179         if (!image.isNull()) {

   180             {

   181                 ImageItem *item = new ImageItem(image);

   182                 item->setPos(0, 0);

   183                 item->setFlags(QGraphicsItem::ItemIsMovable);

   184                 standardGestures->scene->addItem(item);

   185             }

   186             {

   187                 ImageItem *item = new ImageItem(image);

   188                 item->setPos(0, 0);

   189                 item->setFlags(QGraphicsItem::ItemIsMovable);

   190                 globalViewGestures->scene->addItem(item);

   191             }

   192             {

   193                 GestureImageItem *item = new GestureImageItem(image);

   194                 item->setPos(0, 0);

   195                 item->setFlags(QGraphicsItem::ItemIsMovable);

   196                 graphicsItemGestures->scene->addItem(item);

   197             }

   198         }

   199     }

   200 

   201     {

   202         QList<QGraphicsItem*> items = standardGestures->scene->items();

   203         if (!items.isEmpty())

   204             standardGestures->view->ensureVisible(items.at(0));

   205     }

   206     {

   207         QList<QGraphicsItem*> items = globalViewGestures->scene->items();

   208         if (!items.isEmpty())

   209             globalViewGestures->view->ensureVisible(items.at(0));

   210     }

   211     {

   212         QList<QGraphicsItem*> items = graphicsItemGestures->scene->items();

   213         if (!items.isEmpty())

   214             graphicsItemGestures->view->ensureVisible(items.at(0));

   215     }

   216 }

   217 

   218 int main(int argc, char **argv)

   219 {

   220     QApplication app(argc, argv);

   221     MainWindow window;

   222     if (QApplication::arguments().size() > 1)

   223         window.setDirectory(QApplication::arguments().at(1));

   224     else

   225         window.setDirectory(QFileDialog::getExistingDirectory(0, "Select image folder"));

   226     window.show();

   227     return app.exec();

   228 }

   229 

   230 #include "main.moc"