Implemented QPinchGesture.

Added a new standard gesture, which is implemented using a native zoom and
rotate gestures on Windows and with a direct touch event handling on other
platforms.

Improved pan support - we subscribe to native pan gesture only when it's really
needed, and we pass proper flags for single finger horizontal/vertical panning.

Reviewed-by: Richard Moe Gustavsen

1 files changed, 39 insertions, 0 deletions

diff --git a/src/gui/kernel/qstandardgestures.h b/src/gui/kernel/qstandardgestures.h
index 03a1374..adee740 100644
--- a/src/gui/kernel/qstandardgestures.h
+++ b/src/gui/kernel/qstandardgestures.h
@@ -80,6 +80,45 @@ private:
     friend class QWidget;
 };
 
+class QPinchGesturePrivate;
+class Q_GUI_EXPORT QPinchGesture : public QGesture
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QPinchGesture)
+
+    Q_PROPERTY(qreal scaleFactor READ scaleFactor)
+    Q_PROPERTY(qreal lastScaleFactor READ lastScaleFactor)
+
+    Q_PROPERTY(qreal rotationAngle READ rotationAngle)
+    Q_PROPERTY(qreal lastRotationAngle READ lastRotationAngle)
+
+    Q_PROPERTY(QPoint startCenterPoint READ startCenterPoint)
+    Q_PROPERTY(QPoint lastCenterPoint READ lastCenterPoint)
+    Q_PROPERTY(QPoint centerPoint READ centerPoint)
+
+public:
+    QPinchGesture(QWidget *parent);
+
+    bool filterEvent(QEvent *event);
+    void reset();
+
+    QPoint startCenterPoint() const;
+    QPoint lastCenterPoint() const;
+    QPoint centerPoint() const;
+
+    qreal scaleFactor() const;
+    qreal lastScaleFactor() const;
+
+    qreal rotationAngle() const;
+    qreal lastRotationAngle() const;
+
+private:
+    bool event(QEvent *event);
+    bool eventFilter(QObject *receiver, QEvent *event);
+
+    friend class QWidget;
+};
+
 QT_END_NAMESPACE
 
 QT_END_HEADER