qt 6.5.1 original

tests/manual/gestures/CMakeLists.txt

@@ -0,0 +1,5 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+add_subdirectory(graphicsview)
+add_subdirectory(scrollarea)

tests/manual/gestures/gestures.pro

@@ -0,0 +1,4 @@
+TEMPLATE=subdirs
+
+SUBDIRS = graphicsview \
+    scrollarea

tests/manual/gestures/graphicsview/CMakeLists.txt

@@ -0,0 +1,18 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_manual_graphicsview Binary:
+#####################################################################
+
+qt_internal_add_manual_test(tst_manual_graphicsview
+    GUI
+    SOURCES
+        gestures.cpp gestures.h
+        imageitem.cpp imageitem.h
+        main.cpp
+        mousepangesturerecognizer.cpp mousepangesturerecognizer.h
+    LIBRARIES
+        Qt::Gui
+        Qt::Widgets
+)

tests/manual/gestures/graphicsview/gestures.cpp

@@ -0,0 +1,93 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "gestures.h"
+
+#include <QTouchEvent>
+
+Qt::GestureType ThreeFingerSlideGesture::Type = Qt::CustomGesture;
+
+QGesture *ThreeFingerSlideGestureRecognizer::create(QObject *)
+{
+    return new ThreeFingerSlideGesture;
+}
+
+QGestureRecognizer::Result ThreeFingerSlideGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event)
+{
+    ThreeFingerSlideGesture *d = static_cast<ThreeFingerSlideGesture *>(state);
+    QGestureRecognizer::Result result;
+    switch (event->type()) {
+    case QEvent::TouchBegin:
+        result = QGestureRecognizer::MayBeGesture;
+        break;
+    case QEvent::TouchEnd:
+        if (d->gestureFired)
+            result = QGestureRecognizer::FinishGesture;
+        else
+            result = QGestureRecognizer::CancelGesture;
+        break;
+    case QEvent::TouchUpdate:
+        if (d->state() != Qt::NoGesture) {
+            QTouchEvent *ev = static_cast<QTouchEvent*>(event);
+            if (ev->points().size() == 3) {
+                d->gestureFired = true;
+                result = QGestureRecognizer::TriggerGesture;
+            } else {
+                result = QGestureRecognizer::MayBeGesture;
+                for (const QEventPoint &pt : ev->points()) {
+                    const int distance = (pt.globalPosition().toPoint() - pt.globalPressPosition().toPoint()).manhattanLength();
+                    if (distance > 20)
+                        result = QGestureRecognizer::CancelGesture;
+                }
+            }
+        } else {
+            result = QGestureRecognizer::CancelGesture;
+        }
+
+        break;
+    case QEvent::MouseButtonPress:
+    case QEvent::MouseButtonRelease:
+    case QEvent::MouseMove:
+        if (d->state() != Qt::NoGesture)
+            result = QGestureRecognizer::Ignore;
+        else
+            result = QGestureRecognizer::CancelGesture;
+        break;
+    default:
+        result = QGestureRecognizer::Ignore;
+        break;
+    }
+    return result;
+}
+
+void ThreeFingerSlideGestureRecognizer::reset(QGesture *state)
+{
+    static_cast<ThreeFingerSlideGesture *>(state)->gestureFired = false;
+    QGestureRecognizer::reset(state);
+}
+
+
+QGesture *RotateGestureRecognizer::create(QObject *)
+{
+    return new QGesture;
+}
+
+QGestureRecognizer::Result RotateGestureRecognizer::recognize(QGesture *, QObject *, QEvent *event)
+{
+    switch (event->type()) {
+    case QEvent::TouchBegin:
+    case QEvent::TouchEnd:
+    case QEvent::TouchUpdate:
+        break;
+    default:
+        break;
+    }
+    return QGestureRecognizer::Ignore;
+}
+
+void RotateGestureRecognizer::reset(QGesture *state)
+{
+    QGestureRecognizer::reset(state);
+}
+
+#include "moc_gestures.cpp"

tests/manual/gestures/graphicsview/gestures.h

@@ -0,0 +1,40 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef GESTURE_H
+#define GESTURE_H
+
+#include <QGestureRecognizer>
+#include <QGesture>
+
+class ThreeFingerSlideGesture : public QGesture
+{
+    Q_OBJECT
+public:
+    static Qt::GestureType Type;
+
+    ThreeFingerSlideGesture(QObject *parent = nullptr) : QGesture(parent) { }
+
+    bool gestureFired;
+};
+
+class ThreeFingerSlideGestureRecognizer : public QGestureRecognizer
+{
+private:
+    QGesture *create(QObject *target);
+    QGestureRecognizer::Result recognize(QGesture *state, QObject *watched, QEvent *event);
+    void reset(QGesture *state);
+};
+
+class RotateGestureRecognizer : public QGestureRecognizer
+{
+public:
+    RotateGestureRecognizer();
+
+private:
+    QGesture *create(QObject *target);
+    QGestureRecognizer::Result recognize(QGesture *state, QObject *watched, QEvent *event);
+    void reset(QGesture *state);
+};
+
+#endif // GESTURE_H

tests/manual/gestures/graphicsview/graphicsview.pro

@@ -0,0 +1,12 @@
+QT += widgets
+
+TARGET = tst_manual_graphicsview
+
+SOURCES += main.cpp \
+    imageitem.cpp \
+    gestures.cpp \
+    mousepangesturerecognizer.cpp
+
+HEADERS += imageitem.h \
+    gestures.h \
+    mousepangesturerecognizer.h

tests/manual/gestures/graphicsview/imageitem.cpp

@@ -0,0 +1,55 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "imageitem.h"
+#include "gestures.h"
+
+#include <QPainter>
+#include <QEvent>
+
+ImageItem::ImageItem(const QImage &image)
+{
+    setImage(image);
+}
+
+void ImageItem::setImage(const QImage &image)
+{
+    image_ = image;
+    pixmap_ = QPixmap::fromImage(image.scaled(400, 400, Qt::KeepAspectRatio));
+    update();
+}
+
+QImage ImageItem::image() const
+{
+    return image_;
+}
+
+QRectF ImageItem::boundingRect() const
+{
+    const QSize size = pixmap_.size();
+    return QRectF(0, 0, size.width(), size.height());
+}
+
+void ImageItem::paint(QPainter *painter, const QStyleOptionGraphicsItem*, QWidget*)
+{
+    painter->drawPixmap(0, 0, pixmap_);
+}
+
+
+GestureImageItem::GestureImageItem(const QImage &image)
+    : ImageItem(image)
+{
+    grabGesture(Qt::PanGesture);
+    grabGesture(ThreeFingerSlideGesture::Type);
+}
+
+bool GestureImageItem::event(QEvent *event)
+{
+    if (event->type() == QEvent::Gesture) {
+        qDebug("gestureimageitem: gesture triggered");
+        return true;
+    }
+    return ImageItem::event(event);
+}
+
+#include "moc_imageitem.cpp"

tests/manual/gestures/graphicsview/imageitem.h

@@ -0,0 +1,39 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef IMAGEITEM_H
+#define IMAGEITEM_H
+
+#include <QGraphicsItem>
+#include <QImage>
+#include <QPixmap>
+#include <QTransform>
+
+class ImageItem : public QGraphicsObject
+{
+    Q_OBJECT
+public:
+    ImageItem(const QImage &image);
+    void setImage(const QImage &image);
+    QImage image() const;
+    QRectF boundingRect() const;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+
+private:
+    QImage image_;
+    QPixmap pixmap_;
+    QTransform transform;
+};
+
+class GestureImageItem : public ImageItem
+{
+    Q_OBJECT
+
+public:
+    GestureImageItem(const QImage &image);
+
+protected:
+    bool event(QEvent *event);
+};
+
+#endif // IMAGEITEM_H

tests/manual/gestures/graphicsview/main.cpp

@@ -0,0 +1,201 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QApplication>
+#include <QMainWindow>
+#include <QGraphicsScene>
+#include <QGraphicsView>
+#include <QScrollBar>
+#include <QImageReader>
+#include <QVBoxLayout>
+#include <QGestureEvent>
+#include <QDir>
+#include <QFileDialog>
+
+#include "imageitem.h"
+#include "gestures.h"
+#include "mousepangesturerecognizer.h"
+
+class GraphicsView : public QGraphicsView
+{
+public:
+    GraphicsView(QGraphicsScene *scene, QWidget *parent = nullptr)
+        : QGraphicsView(scene, parent)
+    {
+    }
+protected:
+    bool viewportEvent(QEvent *event)
+    {
+        if (event->type() == QEvent::Gesture) {
+            QGestureEvent *ge = static_cast<QGestureEvent *>(event);
+            if (QPanGesture *pan = static_cast<QPanGesture *>(ge->gesture(Qt::PanGesture))) {
+                switch (pan->state()) {
+                case Qt::GestureStarted: qDebug("view: Pan: started"); break;
+                case Qt::GestureFinished: qDebug("view: Pan: finished"); break;
+                case Qt::GestureCanceled: qDebug("view: Pan: canceled"); break;
+                case Qt::GestureUpdated: break;
+                default: qDebug("view: Pan: <unknown state>"); break;
+                }
+
+                const QPointF delta = pan->delta();
+                QScrollBar *vbar = verticalScrollBar();
+                QScrollBar *hbar = horizontalScrollBar();
+                vbar->setValue(vbar->value() - delta.y());
+                hbar->setValue(hbar->value() - delta.x());
+                ge->accept(pan);
+                return true;
+            }
+        }
+        return QGraphicsView::viewportEvent(event);
+    }
+};
+
+class StandardGestures : public QWidget
+{
+public:
+    StandardGestures(QWidget *parent = nullptr)
+            : QWidget(parent)
+    {
+        scene = new QGraphicsScene(this);
+        scene->setSceneRect(-2000, -2000, 4000, 4000);
+        view = new QGraphicsView(scene, 0);
+        QVBoxLayout *l = new QVBoxLayout(this);
+        l->addWidget(view);
+    }
+
+    QGraphicsScene *scene;
+    QGraphicsView *view;
+};
+
+class GlobalViewGestures : public QWidget
+{
+    Q_OBJECT
+public:
+    GlobalViewGestures(QWidget *parent = nullptr)
+            : QWidget(parent)
+    {
+        scene = new QGraphicsScene(this);
+        scene->setSceneRect(-2000, -2000, 4000, 4000);
+        view = new GraphicsView(scene, 0);
+        view->viewport()->grabGesture(Qt::PanGesture);
+        view->viewport()->grabGesture(ThreeFingerSlideGesture::Type);
+        QVBoxLayout *l = new QVBoxLayout(this);
+        l->addWidget(view);
+    }
+
+    QGraphicsScene *scene;
+    QGraphicsView *view;
+};
+
+class GraphicsItemGestures : public QWidget
+{
+    Q_OBJECT
+public:
+    GraphicsItemGestures(QWidget *parent = nullptr)
+            : QWidget(parent)
+    {
+        scene = new QGraphicsScene(this);
+        scene->setSceneRect(-2000, -2000, 4000, 4000);
+        view = new QGraphicsView(scene, 0);
+        view->viewport()->grabGesture(Qt::PanGesture);
+        view->viewport()->grabGesture(ThreeFingerSlideGesture::Type);
+        QVBoxLayout *l = new QVBoxLayout(this);
+        l->addWidget(view);
+    }
+
+    QGraphicsScene *scene;
+    QGraphicsView *view;
+};
+
+class MainWindow : public QMainWindow
+{
+public:
+    MainWindow();
+
+    void setDirectory(const QString &path);
+
+private:
+    QTabWidget *tabWidget;
+    StandardGestures *standardGestures;
+    GlobalViewGestures *globalViewGestures;
+    GraphicsItemGestures *graphicsItemGestures;
+};
+
+MainWindow::MainWindow()
+{
+    (void)QGestureRecognizer::registerRecognizer(new MousePanGestureRecognizer);
+    ThreeFingerSlideGesture::Type = QGestureRecognizer::registerRecognizer(new ThreeFingerSlideGestureRecognizer);
+
+    tabWidget = new QTabWidget;
+
+    standardGestures = new StandardGestures;
+    tabWidget->addTab(standardGestures, "Standard gestures");
+
+    globalViewGestures = new GlobalViewGestures;
+    tabWidget->addTab(globalViewGestures , "Global gestures");
+
+    graphicsItemGestures = new GraphicsItemGestures;
+    tabWidget->addTab(graphicsItemGestures, "Graphics item gestures");
+
+    setCentralWidget(tabWidget);
+}
+
+void MainWindow::setDirectory(const QString &path)
+{
+    QDir dir(path);
+    QStringList files = dir.entryList(QDir::Files | QDir::Readable | QDir::NoDotAndDotDot);
+    foreach(const QString &file, files) {
+        QImageReader img(path + QLatin1Char('/') +file);
+        QImage image = img.read();
+        if (!image.isNull()) {
+            {
+                ImageItem *item = new ImageItem(image);
+                item->setPos(0, 0);
+                item->setFlags(QGraphicsItem::ItemIsMovable);
+                standardGestures->scene->addItem(item);
+            }
+            {
+                ImageItem *item = new ImageItem(image);
+                item->setPos(0, 0);
+                item->setFlags(QGraphicsItem::ItemIsMovable);
+                globalViewGestures->scene->addItem(item);
+            }
+            {
+                GestureImageItem *item = new GestureImageItem(image);
+                item->setPos(0, 0);
+                item->setFlags(QGraphicsItem::ItemIsMovable);
+                graphicsItemGestures->scene->addItem(item);
+            }
+        }
+    }
+
+    {
+        QList<QGraphicsItem*> items = standardGestures->scene->items();
+        if (!items.isEmpty())
+            standardGestures->view->ensureVisible(items.at(0));
+    }
+    {
+        QList<QGraphicsItem*> items = globalViewGestures->scene->items();
+        if (!items.isEmpty())
+            globalViewGestures->view->ensureVisible(items.at(0));
+    }
+    {
+        QList<QGraphicsItem*> items = graphicsItemGestures->scene->items();
+        if (!items.isEmpty())
+            graphicsItemGestures->view->ensureVisible(items.at(0));
+    }
+}
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    MainWindow window;
+    if (QApplication::arguments().size() > 1)
+        window.setDirectory(QApplication::arguments().at(1));
+    else
+        window.setDirectory(QFileDialog::getExistingDirectory(0, "Select image folder"));
+    window.show();
+    return app.exec();
+}
+
+#include "main.moc"

tests/manual/gestures/graphicsview/mousepangesturerecognizer.cpp

@@ -0,0 +1,69 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "mousepangesturerecognizer.h"
+
+#include <QEvent>
+#include <QVariant>
+#include <QGraphicsSceneMouseEvent>
+#include <QMouseEvent>
+#include <QGesture>
+
+MousePanGestureRecognizer::MousePanGestureRecognizer()
+{
+}
+
+QGesture* MousePanGestureRecognizer::create(QObject *)
+{
+    return new QPanGesture;
+}
+
+QGestureRecognizer::Result MousePanGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(state);
+    QPoint globalPos;
+    switch (event->type()) {
+    case QEvent::GraphicsSceneMousePress:
+    case QEvent::GraphicsSceneMouseDoubleClick:
+    case QEvent::GraphicsSceneMouseMove:
+    case QEvent::GraphicsSceneMouseRelease:
+        globalPos = static_cast<QGraphicsSceneMouseEvent *>(event)->screenPos();
+        break;
+    case QEvent::MouseButtonPress:
+    case QEvent::MouseMove:
+    case QEvent::MouseButtonRelease:
+        globalPos = static_cast<QMouseEvent *>(event)->globalPosition().toPoint();
+        break;
+    default:
+        break;
+    }
+    if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonDblClick
+        || event->type() == QEvent::GraphicsSceneMousePress || event->type() == QEvent::GraphicsSceneMouseDoubleClick) {
+        g->setHotSpot(globalPos);
+        g->setProperty("startPos", globalPos);
+        g->setProperty("pressed", QVariant::fromValue<bool>(true));
+        return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+    } else if (event->type() == QEvent::MouseMove || event->type() == QEvent::GraphicsSceneMouseMove) {
+        if (g->property("pressed").toBool()) {
+            QPoint offset = globalPos - g->property("startPos").toPoint();
+            g->setLastOffset(g->offset());
+            g->setOffset(QPointF(offset.x(), offset.y()));
+            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+        }
+        return QGestureRecognizer::CancelGesture;
+    } else if (event->type() == QEvent::MouseButtonRelease || event->type() == QEvent::GraphicsSceneMouseRelease) {
+        return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
+    }
+    return QGestureRecognizer::Ignore;
+}
+
+void MousePanGestureRecognizer::reset(QGesture *state)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(state);
+    g->setLastOffset(QPointF());
+    g->setOffset(QPointF());
+    g->setAcceleration(0);
+    g->setProperty("startPos", QVariant());
+    g->setProperty("pressed", QVariant::fromValue<bool>(false));
+    QGestureRecognizer::reset(state);
+}

tests/manual/gestures/graphicsview/mousepangesturerecognizer.h

@@ -0,0 +1,19 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef MOUSEPANGESTURERECOGNIZER_H
+#define MOUSEPANGESTURERECOGNIZER_H
+
+#include <QGestureRecognizer>
+
+class MousePanGestureRecognizer : public QGestureRecognizer
+{
+public:
+    MousePanGestureRecognizer();
+
+    QGesture* create(QObject *target);
+    QGestureRecognizer::Result recognize(QGesture *state, QObject *watched, QEvent *event);
+    void reset(QGesture *state);
+};
+
+#endif // MOUSEPANGESTURERECOGNIZER_H

tests/manual/gestures/scrollarea/CMakeLists.txt

@@ -0,0 +1,16 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## scrollarea Binary:
+#####################################################################
+
+qt_internal_add_manual_test(scrollarea
+    GUI
+    SOURCES
+        main.cpp
+        mousepangesturerecognizer.cpp mousepangesturerecognizer.h
+    LIBRARIES
+        Qt::Gui
+        Qt::Widgets
+)

tests/manual/gestures/scrollarea/main.cpp

@@ -0,0 +1,213 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QApplication>
+#include <QSlider>
+#include <QScrollArea>
+#include <QScrollBar>
+#include <QMainWindow>
+#include <QLabel>
+#include <QPushButton>
+#include <QVBoxLayout>
+#include <QGestureEvent>
+#include <QPanGesture>
+#include <QDebug>
+
+#include "mousepangesturerecognizer.h"
+
+class ScrollArea : public QScrollArea
+{
+    Q_OBJECT
+public:
+    ScrollArea(QWidget *parent = nullptr)
+        : QScrollArea(parent), outside(false)
+    {
+        viewport()->grabGesture(Qt::PanGesture, Qt::ReceivePartialGestures);
+    }
+
+protected:
+    bool viewportEvent(QEvent *event)
+    {
+        if (event->type() == QEvent::Gesture) {
+            gestureEvent(static_cast<QGestureEvent *>(event));
+            return true;
+        } else if (event->type() == QEvent::GestureOverride) {
+            QGestureEvent *ge = static_cast<QGestureEvent *>(event);
+            if (QPanGesture *pan = static_cast<QPanGesture *>(ge->gesture(Qt::PanGesture)))
+                if (pan->state() == Qt::GestureStarted) {
+                    outside = false;
+                }
+        }
+        return QScrollArea::viewportEvent(event);
+    }
+    void gestureEvent(QGestureEvent *event)
+    {
+        QPanGesture *pan = static_cast<QPanGesture *>(event->gesture(Qt::PanGesture));
+        if (pan) {
+            switch(pan->state()) {
+            case Qt::GestureStarted: qDebug() << this << "Pan: started"; break;
+            case Qt::GestureFinished: qDebug() << this << "Pan: finished"; break;
+            case Qt::GestureCanceled: qDebug() << this << "Pan: canceled"; break;
+            case Qt::GestureUpdated: break;
+            default: qDebug() << this << "Pan: <unknown state>"; break;
+            }
+
+            if (pan->state() == Qt::GestureStarted)
+                outside = false;
+            event->ignore();
+            event->ignore(pan);
+            if (outside)
+                return;
+
+            const QPointF delta = pan->delta();
+            const QPointF totalOffset = pan->offset();
+            QScrollBar *vbar = verticalScrollBar();
+            QScrollBar *hbar = horizontalScrollBar();
+
+            if ((vbar->value() == vbar->minimum() && totalOffset.y() > 10) ||
+                (vbar->value() == vbar->maximum() && totalOffset.y() < -10)) {
+                outside = true;
+                return;
+            }
+            if ((hbar->value() == hbar->minimum() && totalOffset.x() > 10) ||
+                (hbar->value() == hbar->maximum() && totalOffset.x() < -10)) {
+                outside = true;
+                return;
+            }
+            vbar->setValue(vbar->value() - delta.y());
+            hbar->setValue(hbar->value() - delta.x());
+            event->accept(pan);
+        }
+    }
+
+private:
+    bool outside;
+};
+
+class Slider : public QSlider
+{
+public:
+    Slider(Qt::Orientation orientation, QWidget *parent = nullptr)
+        : QSlider(orientation, parent)
+    {
+        grabGesture(Qt::PanGesture);
+    }
+protected:
+    bool event(QEvent *event)
+    {
+        if (event->type() == QEvent::Gesture) {
+            gestureEvent(static_cast<QGestureEvent *>(event));
+            return true;
+        }
+        return QSlider::event(event);
+    }
+    void gestureEvent(QGestureEvent *event)
+    {
+        QPanGesture *pan = static_cast<QPanGesture *>(event->gesture(Qt::PanGesture));
+        if (pan) {
+            switch (pan->state()) {
+            case Qt::GestureStarted: qDebug() << this << "Pan: started"; break;
+            case Qt::GestureFinished: qDebug() << this << "Pan: finished"; break;
+            case Qt::GestureCanceled: qDebug() << this << "Pan: canceled"; break;
+            case Qt::GestureUpdated: break;
+            default: qDebug() << this << "Pan: <unknown state>"; break;
+            }
+
+            if (pan->state() == Qt::GestureStarted)
+                outside = false;
+            event->ignore();
+            event->ignore(pan);
+            if (outside)
+                return;
+            const QPointF delta = pan->delta();
+            const QPointF totalOffset = pan->offset();
+            if (orientation() == Qt::Horizontal) {
+                if ((value() == minimum() && totalOffset.x() < -10) ||
+                    (value() == maximum() && totalOffset.x() > 10)) {
+                    outside = true;
+                    return;
+                }
+                if (totalOffset.y() < 40 && totalOffset.y() > -40) {
+                    setValue(value() + delta.x());
+                    event->accept(pan);
+                } else {
+                    outside = true;
+                }
+            } else if (orientation() == Qt::Vertical) {
+                if ((value() == maximum() && totalOffset.y() < -10) ||
+                    (value() == minimum() && totalOffset.y() > 10)) {
+                    outside = true;
+                    return;
+                }
+                if (totalOffset.x() < 40 && totalOffset.x() > -40) {
+                    setValue(value() - delta.y());
+                    event->accept(pan);
+                } else {
+                    outside = true;
+                }
+            }
+        }
+    }
+private:
+    bool outside;
+};
+
+class MainWindow : public QMainWindow
+{
+public:
+    MainWindow()
+    {
+        rootScrollArea = new ScrollArea;
+        rootScrollArea->setObjectName(QLatin1String("rootScrollArea"));
+        setCentralWidget(rootScrollArea);
+
+        QWidget *root = new QWidget;
+        root->setFixedSize(3000, 3000);
+        rootScrollArea->setWidget(root);
+
+        Slider *verticalSlider = new Slider(Qt::Vertical, root);
+        verticalSlider->setObjectName(QLatin1String("verticalSlider"));
+        verticalSlider ->move(650, 1100);
+        Slider *horizontalSlider = new Slider(Qt::Horizontal, root);
+        horizontalSlider->setObjectName(QLatin1String("horizontalSlider"));
+        horizontalSlider ->move(600, 1000);
+
+        childScrollArea = new ScrollArea(root);
+        childScrollArea->setObjectName(QLatin1String("childScrollArea"));
+        childScrollArea->move(500, 500);
+        QWidget *w = new QWidget;
+        w->setMinimumWidth(700);
+        QVBoxLayout *l = new QVBoxLayout(w);
+        l->setContentsMargins(20, 20, 20, 20);
+        for (int i = 0; i < 100; ++i) {
+            QWidget *w = new QWidget;
+            QHBoxLayout *ll = new QHBoxLayout(w);
+            ll->addWidget(new QLabel(QString("Label %1").arg(i)));
+            ll->addWidget(new QPushButton(QString("Button %1").arg(i)));
+            l->addWidget(w);
+        }
+        childScrollArea->setWidget(w);
+#if defined(Q_OS_WIN)
+        // Windows can force Qt to create a native window handle for an
+        // intermediate widget and that will block gesture to get touch events.
+        // So this hack to make sure gestures get all touch events they need.
+        foreach (QObject *w, children())
+            if (w->isWidgetType())
+                static_cast<QWidget *>(w)->setAttribute(Qt::WA_AcceptTouchEvents);
+#endif
+    }
+private:
+    ScrollArea *rootScrollArea;
+    ScrollArea *childScrollArea;
+};
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    QGestureRecognizer::registerRecognizer(new MousePanGestureRecognizer);
+    MainWindow w;
+    w.show();
+    return app.exec();
+}
+
+#include "main.moc"

tests/manual/gestures/scrollarea/mousepangesturerecognizer.cpp

@@ -0,0 +1,61 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "mousepangesturerecognizer.h"
+
+#include <QEvent>
+#include <QMouseEvent>
+#include <QGesture>
+
+MousePanGestureRecognizer::MousePanGestureRecognizer()
+{
+}
+
+QGesture *MousePanGestureRecognizer::create(QObject *)
+{
+    return new QPanGesture;
+}
+
+QGestureRecognizer::Result MousePanGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(state);
+    if (event->type() == QEvent::TouchBegin) {
+        // ignore the following mousepress event
+        g->setProperty("ignoreMousePress", QVariant::fromValue<bool>(true));
+    } else if (event->type() == QEvent::TouchEnd) {
+        g->setProperty("ignoreMousePress", QVariant::fromValue<bool>(false));
+    }
+    QMouseEvent *me = static_cast<QMouseEvent *>(event);
+    if (event->type() == QEvent::MouseButtonPress) {
+        if (g->property("ignoreMousePress").toBool())
+            return QGestureRecognizer::Ignore;
+        g->setHotSpot(me->globalPos());
+        g->setProperty("startPos", me->globalPos());
+        g->setProperty("pressed", QVariant::fromValue<bool>(true));
+        return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+    } else if (event->type() == QEvent::MouseMove) {
+        if (g->property("pressed").toBool()) {
+            QPoint offset = me->globalPos() - g->property("startPos").toPoint();
+            g->setLastOffset(g->offset());
+            g->setOffset(QPointF(offset.x(), offset.y()));
+            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+        }
+        return QGestureRecognizer::CancelGesture;
+    } else if (event->type() == QEvent::MouseButtonRelease) {
+        if (g->property("pressed").toBool())
+            return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
+    }
+    return QGestureRecognizer::Ignore;
+}
+
+void MousePanGestureRecognizer::reset(QGesture *state)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(state);
+    g->setLastOffset(QPointF());
+    g->setOffset(QPointF());
+    g->setAcceleration(0);
+    g->setProperty("startPos", QVariant());
+    g->setProperty("pressed", QVariant::fromValue<bool>(false));
+    g->setProperty("ignoreMousePress", QVariant::fromValue<bool>(false));
+    QGestureRecognizer::reset(state);
+}

tests/manual/gestures/scrollarea/mousepangesturerecognizer.h

@@ -0,0 +1,19 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef MOUSEPANGESTURERECOGNIZER_H
+#define MOUSEPANGESTURERECOGNIZER_H
+
+#include <QGestureRecognizer>
+
+class MousePanGestureRecognizer : public QGestureRecognizer
+{
+public:
+    MousePanGestureRecognizer();
+
+    QGesture* create(QObject *target);
+    QGestureRecognizer::Result recognize(QGesture *state, QObject *watched, QEvent *event);
+    void reset(QGesture *state);
+};
+
+#endif // MOUSEPANGESTURERECOGNIZER_H

tests/manual/gestures/scrollarea/scrollarea.pro

@@ -0,0 +1,5 @@
+QT += widgets
+
+SOURCES = main.cpp \
+    mousepangesturerecognizer.cpp
+HEADERS += mousepangesturerecognizer.h