A new implementation of the Gesture API.

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

Reviewed-by: trustme

1 files changed, 124 insertions, 0 deletions

diff --git a/src/gui/kernel/qwinnativepangesturerecognizer_win.cpp b/src/gui/kernel/qwinnativepangesturerecognizer_win.cpp
new file mode 100644
index 0000000..4619594
--- /dev/null
+++ b/src/gui/kernel/qwinnativepangesturerecognizer_win.cpp
@@ -0,0 +1,124 @@
+/****************************************************************************
+**
+** 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 QtGui module 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 "private/qwinnativepangesturerecognizer_win_p.h"
+
+#include "qevent.h"
+#include "qgraphicsitem.h"
+#include "qgesture.h"
+
+#include "private/qgesture_p.h"
+#include "private/qevent_p.h"
+#include "private/qapplication_p.h"
+#include "private/qwidget_p.h"
+
+QT_BEGIN_NAMESPACE
+
+QWinNativePanGestureRecognizer::QWinNativePanGestureRecognizer()
+{
+}
+
+QGesture* QWinNativePanGestureRecognizer::createGesture(QObject *target) const
+{
+    if (!target)
+        return new QPanGesture; // a special case
+    if (qobject_cast<QGraphicsObject*>(target))
+        return 0;
+    if (!target->isWidgetType())
+        return 0;
+
+    QWidget *q = static_cast<QWidget*>(target);
+    QWidgetPrivate *d = q->d_func();
+    d->nativeGesturePanEnabled = true;
+    d->winSetupGestures();
+
+    return new QPanGesture;
+}
+
+QGestureRecognizer::Result QWinNativePanGestureRecognizer::filterEvent(QGesture *state, QObject *, QEvent *event)
+{
+    QPanGesture *q = static_cast<QPanGesture*>(state);
+    QPanGesturePrivate *d = q->d_func();
+
+    QGestureRecognizer::Result result = QGestureRecognizer::Ignore;
+    if (event->type() == QEvent::NativeGesture) {
+        QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
+        switch(ev->gestureType) {
+        case QNativeGestureEvent::GestureBegin:
+            break;
+        case QNativeGestureEvent::Pan:
+            result = QGestureRecognizer::GestureTriggered;
+            event->accept();
+            break;
+        case QNativeGestureEvent::GestureEnd:
+            if (q->state() == Qt::NoGesture)
+                return QGestureRecognizer::Ignore; // some other gesture has ended
+            result = QGestureRecognizer::GestureFinished;
+            break;
+        default:
+            return QGestureRecognizer::Ignore;
+        }
+        if (q->state() == Qt::NoGesture) {
+            d->lastOffset = d->totalOffset = d->offset = QSize();
+        } else {
+            d->lastOffset = d->offset;
+            d->offset = QSize(ev->position.x() - d->lastPosition.x(),
+                              ev->position.y() - d->lastPosition.y());
+            d->totalOffset += d->offset;
+        }
+        d->lastPosition = ev->position;
+    }
+    return result;
+}
+
+void QWinNativePanGestureRecognizer::reset(QGesture *state)
+{
+    QPanGesture *pan = static_cast<QPanGesture*>(state);
+    QPanGesturePrivate *d = pan->d_func();
+
+    d->totalOffset = d->lastOffset = d->offset = QSizeF();
+    d->lastPosition = QPoint();
+    d->acceleration = 0;
+
+    QGestureRecognizer::reset(state);
+}
+
+QT_END_NAMESPACE