util/tests/manual/gestures/graphicsview/mousepangesturerecognizer.cpp
changeset 7 f7bc934e204c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/tests/manual/gestures/graphicsview/mousepangesturerecognizer.cpp	Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,107 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** 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
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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)->globalPos();
+        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);
+}