Differential D13901 Diff 54003 lib/touch/touch_helper.h

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lib/touch/touch_helper.h

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1		/*
2		Gwenview: an image viewer
3		Copyright 2019 Steffen Hartleib <steffenhartleib@t-online.de>
4
	ngrahamUnsubmitted Not Done Your copyright ngraham: Your copyright
5		This program is free software; you can redistribute it and/or
6		modify it under the terms of the GNU General Public License
7		as published by the Free Software Foundation; either version 2
8		of the License, or (at your option) any later version.
9
10		This program is distributed in the hope that it will be useful,
11		but WITHOUT ANY WARRANTY; without even the implied warranty of
12		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13		GNU General Public License for more detai
14		ls.
15
16		You should have received a copy of the GNU General Public License
17		along with this program; if not, write to the Free Software
18		Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.
19
20		*/
21		#ifndef TOUCH_HELPER_H
22		#define TOUCH_HELPER_H
23
24		// Qt
25		#include <QObject>
26		// KDE
27
28		// Local
29		#include <lib/gwenviewlib_export.h>
30
31		class QPoint;
32		class QPointF;
33		class QEvent;
34
35		namespace Gwenview
36		{
37
38		namespace Touch_Helper
39		{
40
41		//constant variables that define touch behavior
	ngrahamUnsubmitted Not Done Typo: wiggel -> wiggle ngraham: Typo: wiggel -> wiggle
42		struct Touch
43		{
44		//a little delay in the begin of the gesture, to get more data of the touch points moving so the recognizing
45		//of the pan gesture is better
46		static const int gestureDelay = 110;
47		//this defines how much a touch point can move, for a single tap gesture
48		static const int wiggleRoomForTap = 10;
49		//how long must a touch point be stationary, before he can move for a TabHoldAndMoving gesture
50		static const int durationForTapHold = 400;
51		//in what time and how far must the touch point moving to trigger a swipe gesture
52		static const int maxTimeFrameForSwipe = 100;
53		static const int minDistanceForSwipe = 70;
54		//How long is the duration for a simple tap gesture
55		static const int maxTimeForTap = 100;
56		//max interval for a double tap gesture
57		static const int doubleTapInterval = 400;
58		};
59
60		GWENVIEWLIB_EXPORT QPoint simpleTapPosition(QEvent*);
61		GWENVIEWLIB_EXPORT QPoint simpleTouchPosition(QEvent*,int = 0);
62		GWENVIEWLIB_EXPORT bool touchStationary(QEvent*);
63
64		} // namespace
65		} // namespace
66
67		#endif /* TOUCH_HELPER_H */