Refactored gesture api

Rewritten the api almost from scratch, making it simplier and more
flexible at the same time.

The current implementation will not have complex gseturemanager class
inside Qt, but the QGesture base class, which represents both a
gesture recognizer and a gesture itself with a set of properties. A
set of common gestures that can use used in third-party applications
(and in Qt itself internally) is supposed to be found in
qstandardgestures.h, and a base class for user-defined gestures is in
qgesture.h

Gesture implementation for Pan on Windows7 has also been added as a
reference implementation for platform gestures.

1 files changed, 19 insertions, 63 deletions

diff --git a/src/gui/kernel/qgesture.h b/src/gui/kernel/qgesture.h
index f3c95cc..b5abdd2 100644
--- a/src/gui/kernel/qgesture.h
+++ b/src/gui/kernel/qgesture.h
@@ -55,50 +55,32 @@ QT_BEGIN_NAMESPACE
 
 QT_MODULE(Gui)
 
+class QGraphicsItem;
 class QGesturePrivate;
 class Q_GUI_EXPORT QGesture : public QObject
 {
     Q_OBJECT
     Q_DECLARE_PRIVATE(QGesture)
 
-    Q_PROPERTY(QString type READ type)
     Q_PROPERTY(Qt::GestureState state READ state)
 
-    Q_PROPERTY(QDateTime startTime READ startTime)
-    Q_PROPERTY(uint duration READ duration)
-
-    Q_PROPERTY(QRect rect READ rect WRITE setRect)
-    Q_PROPERTY(QPoint hotSpot READ hotSpot WRITE setHotSpot)
     Q_PROPERTY(QPoint startPos READ startPos WRITE setStartPos)
     Q_PROPERTY(QPoint lastPos READ lastPos WRITE setLastPos)
     Q_PROPERTY(QPoint pos READ pos WRITE setPos)
 
 public:
-    QGesture(QObject *parent, const QString &type,
-             Qt::GestureState state = Qt::GestureStarted);
-    QGesture(QObject *parent,
-             const QString &type, const QPoint &startPos,
-             const QPoint &lastPos, const QPoint &pos, const QRect &rect,
-             const QPoint &hotSpot, const QDateTime &startTime,
-             uint duration, Qt::GestureState state);
-    virtual ~QGesture();
-
-    inline void setAccepted(bool accepted) { m_accept = accepted; }
-    inline bool isAccepted() const { return m_accept; }
-
-    inline void accept() { m_accept = true; }
-    inline void ignore() { m_accept = false; }
-
-    QString type() const;
-    Qt::GestureState state() const;
+    explicit QGesture(QObject *parent = 0);
+    ~QGesture();
+
+    virtual bool filterEvent(QEvent *event) = 0;
+
+    void setGraphicsItem(QGraphicsItem *);
+    QGraphicsItem *graphicsItem() const;
 
-    QDateTime startTime() const;
-    uint duration() const;
+    virtual void reset();
 
-    QRect rect() const;
-    void setRect(const QRect &rect);
-    QPoint hotSpot() const;
-    void setHotSpot(const QPoint &point);
+    Qt::GestureState state() const;
+    void setState(Qt::GestureState state);
 
     QPoint startPos() const;
     void setStartPos(const QPoint &point);
@@ -108,45 +90,19 @@ public:
     void setPos(const QPoint &point);
 
 protected:
-    QGesture(QGesturePrivate &dd, QObject *parent, const QString &type,
-             Qt::GestureState state = Qt::GestureStarted);
-    virtual void translate(const QPoint &offset);
+    QGesture(QGesturePrivate &dd, QObject *parent);
+    bool eventFilter(QObject*, QEvent*);
 
-private:
-    ushort m_accept : 1;
-
-    friend class QGestureManager;
-    friend class QApplication;
-    friend class QGraphicsScene;
-    friend class QGraphicsScenePrivate;
-    friend class QGestureRecognizerPan;
-    friend class QDoubleTapGestureRecognizer;
-    friend class QTapAndHoldGestureRecognizer;
-};
-
-class QPanningGesturePrivate;
-class Q_GUI_EXPORT QPanningGesture : public QGesture
-{
-    Q_OBJECT
-    Q_DECLARE_PRIVATE(QPanningGesture)
-
-    Q_PROPERTY(Qt::DirectionType lastDirection READ lastDirection)
-    Q_PROPERTY(Qt::DirectionType direction READ direction)
-
-public:
-    Qt::DirectionType lastDirection() const;
-    Qt::DirectionType direction() const;
+signals:
+    void started();
+    void triggered();
+    void finished();
+    void cancelled();
 
 private:
-    QPanningGesture(QObject *parent = 0);
-    ~QPanningGesture();
-
-    friend class QGestureRecognizerPan;
+    friend class QWidget;
 };
 
-Q_DECLARE_METATYPE(Qt::DirectionType)
-Q_DECLARE_METATYPE(Qt::GestureState)
-
 QT_END_NAMESPACE
 
 QT_END_HEADER