util/src/gui/kernel/qgesturemanager_p.h
changeset 7 f7bc934e204c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/src/gui/kernel/qgesturemanager_p.h	Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,147 @@
+/****************************************************************************
+**
+** 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 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGESTUREMANAGER_P_H
+#define QGESTUREMANAGER_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qobject.h"
+#include "qbasictimer.h"
+#include "private/qwidget_p.h"
+#include "qgesturerecognizer.h"
+
+QT_BEGIN_NAMESPACE
+
+class QBasicTimer;
+class QGraphicsObject;
+class QGestureManager : public QObject
+{
+    Q_OBJECT
+public:
+    QGestureManager(QObject *parent);
+    ~QGestureManager();
+
+    Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer);
+    void unregisterGestureRecognizer(Qt::GestureType type);
+
+    bool filterEvent(QWidget *receiver, QEvent *event);
+    bool filterEvent(QObject *receiver, QEvent *event);
+#ifndef QT_NO_GRAPHICSVIEW
+    bool filterEvent(QGraphicsObject *receiver, QEvent *event);
+#endif //QT_NO_GRAPHICSVIEW
+
+    static QGestureManager* instance(); // declared in qapplication.cpp
+
+    void cleanupCachedGestures(QObject *target, Qt::GestureType type);
+
+    void recycle(QGesture *gesture);
+
+protected:
+    void timerEvent(QTimerEvent *event);
+    bool filterEventThroughContexts(const QMultiMap<QObject *, Qt::GestureType> &contexts,
+                                    QEvent *event);
+
+private:
+    QMultiMap<Qt::GestureType, QGestureRecognizer *> m_recognizers;
+
+    QSet<QGesture *> m_activeGestures;
+    QHash<QGesture *, QBasicTimer> m_maybeGestures;
+
+    enum State {
+        Gesture,
+        NotGesture,
+        MaybeGesture // this means timers are up and waiting for some
+                     // more events, and input events are handled by
+                     // gesture recognizer explicitely
+    } state;
+
+    struct ObjectGesture
+    {
+        QWeakPointer<QObject> object;
+        Qt::GestureType gesture;
+
+        ObjectGesture(QObject *o, const Qt::GestureType &g) : object(o), gesture(g) { }
+        inline bool operator<(const ObjectGesture &rhs) const
+        {
+            if (object.data() < rhs.object.data())
+                return true;
+            if (object == rhs.object)
+                return gesture < rhs.gesture;
+            return false;
+        }
+    };
+
+    QMap<ObjectGesture, QList<QGesture *> > m_objectGestures;
+    QHash<QGesture *, QGestureRecognizer *> m_gestureToRecognizer;
+    QHash<QGesture *, QObject *> m_gestureOwners;
+
+    QHash<QGesture *, QWidget *> m_gestureTargets;
+
+    int m_lastCustomGestureId;
+
+    QHash<QGestureRecognizer *, QList<QGesture *> > m_obsoleteGestures;
+    QHash<QGesture *, QGestureRecognizer *> m_deletedRecognizers;
+    void cleanupGesturesForRemovedRecognizer(QGesture *gesture);
+
+    QGesture *getState(QObject *widget, QGestureRecognizer *recognizer,
+                       Qt::GestureType gesture);
+    void deliverEvents(const QSet<QGesture *> &gestures,
+                       QSet<QGesture *> *undeliveredGestures);
+    void getGestureTargets(const QSet<QGesture*> &gestures,
+                           QMap<QWidget *, QList<QGesture *> > *conflicts,
+                           QMap<QWidget *, QList<QGesture *> > *normal);
+
+    void cancelGesturesForChildren(QGesture *originatingGesture);
+};
+
+QT_END_NAMESPACE
+
+#endif // QGESTUREMANAGER_P_H