64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
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/*
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Gwenview: an image viewer
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Copyright 2019 Steffen Hartleib <steffenhartleib@t-online.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more detai
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ls.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.
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*/
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#ifndef TOUCH_HELPER_H
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#define TOUCH_HELPER_H
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// Qt
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// KF
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// Local
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#include <lib/gwenviewlib_export.h>
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class QPoint;
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class QEvent;
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namespace Gwenview
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{
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namespace Touch_Helper
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{
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// constant variables that define touch behavior
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struct Touch {
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// a little delay in the begin of the gesture, to get more data of the touch points moving so the recognizing
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// of the pan gesture is better
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static const int gestureDelay = 110;
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// this defines how much a touch point can move, for a single tap gesture
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static const int wiggleRoomForTap = 10;
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// how long must a touch point be stationary, before he can move for a TabHoldAndMoving gesture
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static const int durationForTapHold = 400;
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// in what time and how far must the touch point moving to trigger a swipe gesture
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static const int maxTimeFrameForSwipe = 100;
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static const int minDistanceForSwipe = 70;
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// How long is the duration for a simple tap gesture
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static const int maxTimeForTap = 100;
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// max interval for a double tap gesture
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static const int doubleTapInterval = 400;
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};
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GWENVIEWLIB_EXPORT QPoint simpleTapPosition(QEvent *);
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GWENVIEWLIB_EXPORT QPoint simpleTouchPosition(QEvent *, int = 0);
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GWENVIEWLIB_EXPORT bool touchStationary(QEvent *);
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} // namespace
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} // namespace
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#endif /* TOUCH_HELPER_H */
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