Manual test: combinations of DragHandler and TapHandler on Flickable

We already had a manual test using a slider, but that has only
one combination of DragHandler and TapHandler.

This test aims to test all possible combinations of DragHandler and
TapHandler together (as siblings, in different parts of the hierarcy,
with a Flickable beneath...)

We also show the current grabbers as an overlay over this entire
collection of manual tests.

Change-Id: Ic634d36d14f7456170f43b077fa72b03fb65bc18
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

1 files changed, 197 insertions, 0 deletions

diff --git a/tests/manual/pointer/inputinspector.cpp b/tests/manual/pointer/inputinspector.cpp
new file mode 100644
index 0000000000..82d814b848
--- /dev/null
+++ b/tests/manual/pointer/inputinspector.cpp
@@ -0,0 +1,197 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the manual tests of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "inputinspector.h"
+#include <QtQuick/QQuickWindow>
+#include <QtQuick/QQuickItem>
+#include <QtQuick/private/qquickpointerhandler_p.h>
+#include <QtCore/QSet>
+
+static const int timerInterval = 100;
+
+InputInspector::InputInspector(QObject *parent) : QObject(parent)
+{
+}
+
+InputInspector::~InputInspector()
+{
+    m_window = nullptr;
+    killTimer(m_timerId);
+}
+
+QString InputInspector::mouseGrabber() const
+{
+    QString name;
+    if (m_window) {
+        if (QQuickItem *grabber = m_window->mouseGrabberItem()) {
+            name = objectIdentifier(grabber);
+        } else {
+            name = QLatin1String("no grabber");
+        }
+    } else {
+        name = "ERROR: need a source window";
+    }
+    return name;
+}
+
+QString InputInspector::passiveGrabbers() const
+{
+    return vectorStringJoin(passiveGrabbers_helper());
+}
+
+QString InputInspector::exclusiveGrabbers() const
+{
+    return vectorStringJoin(exclusiveGrabbers_helper());
+}
+
+QString InputInspector::vectorStringJoin(const QVector<QObject*> &arr) const
+{
+    QString res;
+    for (QObject* obj: arr) {
+        if (!res.isEmpty())
+            res += QLatin1String(" , ");
+        res += objectIdentifier(obj);
+    }
+    res.prepend(QLatin1String("["));
+    res += QLatin1String("]");
+    return res;
+}
+
+QQuickWindow *InputInspector::source() const
+{
+    return m_window;
+}
+
+void InputInspector::setSource(QQuickWindow *window)
+{
+    m_window = window;
+    if (m_window && !m_timerId)
+        m_timerId = startTimer(timerInterval);
+    emit sourceChanged();
+}
+
+void InputInspector::update()
+{
+    const QString mouseGrabberName = mouseGrabber();
+    if (lastState.mouseGrabber != mouseGrabberName) {
+        emit mouseGrabberChanged();
+        lastState.mouseGrabber = mouseGrabberName;
+    }
+
+    const QString tempPassiveGrabbers = passiveGrabbers();
+    if (lastState.passiveGrabbers != tempPassiveGrabbers) {
+        emit passiveGrabbersChanged();
+        lastState.passiveGrabbers = tempPassiveGrabbers;
+    }
+
+    const QString tempExclusiveGrabbers = exclusiveGrabbers();
+    if (lastState.exclusiveGrabbers != tempExclusiveGrabbers) {
+        emit exclusiveGrabbersChanged();
+        lastState.exclusiveGrabbers = tempExclusiveGrabbers;
+    }
+}
+
+void InputInspector::timerEvent(QTimerEvent *event)
+{
+    if (event->timerId() == m_timerId)
+        update();
+}
+
+QQuickPointerDevice *InputInspector::pointerDevice() const
+{
+    QQuickPointerDevice *device = QQuickPointerDevice::touchDevices().value(0);
+    if (!device)
+        device = QQuickPointerDevice::genericMouseDevice();
+    return device;
+}
+
+QVector<QObject*> InputInspector::passiveGrabbers_helper(int pointId /*= 0*/) const
+{
+    QVector<QObject*> result;
+    QSet<QObject*> visited;
+    QQuickPointerDevice *device = pointerDevice();
+    if (device && source()) {
+        QQuickWindowPrivate *winPriv = QQuickWindowPrivate::get(source());
+        QQuickPointerEvent *pointerEvent = winPriv->pointerEventInstance(device);
+        if (pointerEvent) {
+            for (int i = 0; i < pointerEvent->pointCount(); ++i) {
+                QQuickEventPoint *eventPoint = pointerEvent->point(i);
+                QVector<QPointer <QQuickPointerHandler> > passives = eventPoint->passiveGrabbers();
+                if (!pointId || eventPoint->pointId() == pointId) {
+                    for (auto it = passives.constBegin(); it != passives.constEnd(); ++it) {
+                        QObject *handler = it->data();
+                        if (!visited.contains(handler)) {
+                            result << it->data();
+                            visited << handler;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    return result;
+}
+
+QVector<QObject*> InputInspector::exclusiveGrabbers_helper(int pointId /*= 0*/) const
+{
+    QVector<QObject*> result;
+    QSet<QObject*> visited;
+    QQuickPointerDevice *device = pointerDevice();
+    if (device && source()) {
+        QQuickWindowPrivate *winPriv = QQuickWindowPrivate::get(source());
+        QQuickPointerEvent *pointerEvent = winPriv->pointerEventInstance(device);
+        if (pointerEvent) {
+            for (int i = 0; i < pointerEvent->pointCount(); ++i) {
+                QQuickEventPoint *eventPoint = pointerEvent->point(i);
+                if (!pointId || eventPoint->pointId() == pointId) {
+                    if (QObject *exclusiveGrabber = eventPoint->exclusiveGrabber()) {
+                        if (!visited.contains(exclusiveGrabber)) {
+                            result << exclusiveGrabber;
+                            visited << exclusiveGrabber;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    return result;
+}
+
+QString InputInspector::objectIdentifier(QObject *o)
+{
+    QString name;
+    name = o->objectName();
+    if (name.isEmpty())
+        name = o->property("text").toString();
+    if (name.isEmpty())
+        name = o->metaObject()->className();
+    if (name.isEmpty())
+        name = QLatin1String("unknown");
+
+    return name;
+}