A new implementation of the Gesture API.

Implemented gestures using gesture events and separate
QGesture/QGestureRecognizer classes.

Reviewed-by: trustme

1 files changed, 95 insertions, 0 deletions

diff --git a/tests/manual/gestures/graphicsview/mousepangesturerecognizer.cpp b/tests/manual/gestures/graphicsview/mousepangesturerecognizer.cpp
new file mode 100644
index 0000000000..f89f24796f
--- /dev/null
+++ b/tests/manual/gestures/graphicsview/mousepangesturerecognizer.cpp
@@ -0,0 +1,95 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples 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 <QMouseEvent>
+#include <QGesture>
+
+MousePanGestureRecognizer::MousePanGestureRecognizer()
+{
+}
+
+QGesture* MousePanGestureRecognizer::createGesture(QObject *)
+{
+    return new QPanGesture;
+}
+
+QGestureRecognizer::Result MousePanGestureRecognizer::filterEvent(QGesture *state, QObject *, QEvent *event)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(state);
+    QMouseEvent *me = static_cast<QMouseEvent *>(event);
+    if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonDblClick
+        || event->type() == QEvent::GraphicsSceneMousePress || event->type() == QEvent::GraphicsSceneMouseDoubleClick) {
+        g->setHotSpot(me->globalPos());
+        g->setProperty("lastPos", me->globalPos());
+        g->setProperty("pressed", QVariant::fromValue<bool>(true));
+        return QGestureRecognizer::GestureTriggered | QGestureRecognizer::ConsumeEventHint;
+    } else if (event->type() == QEvent::MouseMove || event->type() == QEvent::GraphicsSceneMouseMove) {
+        if (g->property("pressed").toBool()) {
+            QPoint pos = me->globalPos();
+            QPoint lastPos = g->property("lastPos").toPoint();
+            g->setLastOffset(g->offset());
+            lastPos = pos - lastPos;
+            g->setOffset(QSizeF(lastPos.x(), lastPos.y()));
+            g->setTotalOffset(g->totalOffset() + QSizeF(lastPos.x(), lastPos.y()));
+            g->setProperty("lastPos", pos);
+            return QGestureRecognizer::GestureTriggered | QGestureRecognizer::ConsumeEventHint;
+        }
+        return QGestureRecognizer::NotGesture;
+    } else if (event->type() == QEvent::MouseButtonRelease || event->type() == QEvent::GraphicsSceneMouseRelease) {
+        return QGestureRecognizer::GestureFinished | QGestureRecognizer::ConsumeEventHint;
+    }
+    return QGestureRecognizer::Ignore;
+}
+
+void MousePanGestureRecognizer::reset(QGesture *state)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(state);
+    g->setTotalOffset(QSizeF());
+    g->setLastOffset(QSizeF());
+    g->setOffset(QSizeF());
+    g->setAcceleration(0);
+    g->setProperty("lastPos", QVariant());
+    g->setProperty("pressed", QVariant::fromValue<bool>(false));
+    QGestureRecognizer::reset(state);
+}