File indexing completed on 2024-05-12 04:19:52 

0001 /*
0002 Gwenview: an image viewer
0003 Copyright 2019 Steffen Hartleib <steffenhartleib@t-online.de>
0004 
0005 This program is free software; you can redistribute it and/or
0006 modify it under the terms of the GNU General Public License
0007 as published by the Free Software Foundation; either version 2
0008 of the License, or (at your option) any later version.
0009 
0010 This program is distributed in the hope that it will be useful,
0011 but WITHOUT ANY WARRANTY; without even the implied warranty of
0012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0013 GNU General Public License for more details.
0014 
0015 You should have received a copy of the GNU General Public License
0016 along with this program; if not, write to the Free Software
0017 Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.
0018 
0019 */
0020 #ifndef TOUCH_H
0021 #define TOUCH_H
0022 
0023 #include <lib/gwenviewlib_export.h>
0024 // Qt
0025 #include <QObject>
0026 
0027 // KF
0028 
0029 // Local
0030 #include "lib/touch/doubletap.h"
0031 #include "lib/touch/oneandtwofingerswipe.h"
0032 #include "lib/touch/tapholdandmoving.h"
0033 #include "lib/touch/twofingerpan.h"
0034 #include "lib/touch/twofingertap.h"
0035 
0036 namespace Gwenview
0037 {
0038 struct TouchPrivate;
0039 class GWENVIEWLIB_EXPORT Touch : public QObject
0040 {
0041     Q_OBJECT
0042 public:
0043     Touch(QObject *target);
0044     ~Touch() override;
0045     void setZoomParameter(qreal, qreal);
0046     void setRotationThreshold(qreal);
0047     qreal getRotationFromPinchGesture(QGestureEvent *);
0048     qreal getZoomFromPinchGesture(QGestureEvent *);
0049     QPoint positionGesture(QGestureEvent *);
0050     bool checkTwoFingerPanGesture(QGestureEvent *);
0051     bool checkOneAndTwoFingerSwipeGesture(QGestureEvent *);
0052     bool checkTapGesture(QGestureEvent *);
0053     bool checkDoubleTapGesture(QGestureEvent *);
0054     bool checkTwoFingerTapGesture(QGestureEvent *);
0055     bool checkTapHoldAndMovingGesture(QGestureEvent *, QObject *);
0056     bool checkPinchGesture(QGestureEvent *);
0057     void touchToMouseRelease(QPoint, QObject *);
0058     void touchToMouseMove(QPoint, QEvent *, Qt::MouseButton);
0059     void touchToMouseMove(QPoint, QObject *, Qt::MouseButton);
0060     void touchToMouseClick(QPoint, QObject *);
0061     void setPanGestureState(QGestureEvent *event);
0062     Qt::GestureState getLastPanGestureState();
0063     QPointF getLastTapPos();
0064     void setLastTapPos(QPointF);
0065     bool getTapHoldandMovingGestureActive();
0066     void setTapHoldandMovingGestureActive(bool);
0067 
0068     Qt::GestureType getTapHoldandMovingGesture();
0069     Qt::GestureType getTwoFingerPanGesture();
0070     Qt::GestureType getOneAndTwoFingerSwipeGesture();
0071     Qt::GestureType getDoubleTapGesture();
0072     Qt::GestureType getTwoFingerTapGesture();
0073 
0074 protected:
0075     bool eventFilter(QObject *, QEvent *) override;
0076 
0077 Q_SIGNALS:
0078     void PanTriggered(const QPointF &);
0079     void swipeLeftTriggered();
0080     void swipeRightTriggered();
0081     void doubleTapTriggered();
0082     void tapHoldAndMovingTriggered(const QPoint &);
0083     void tapTriggered(const QPoint &);
0084     void pinchGestureStarted(qint64);
0085     void twoFingerTapTriggered();
0086     void pinchZoomTriggered(qreal, const QPoint &, qint64);
0087     void pinchRotateTriggered(qreal);
0088 
0089 private:
0090     qreal calculateZoom(qreal, qreal);
0091     void touchToMouseEvent(QPoint, QObject *, QEvent::Type, Qt::MouseButton, Qt::MouseButtons);
0092     bool gestureEvent(QGestureEvent *);
0093     TouchPrivate *const d;
0094 };
0095 
0096 } // namespace
0097 #endif /* TOUCH_H */