Open Inventor Release 2024.1.1
 
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SoScaleGestureEvent.h
1/*=======================================================================
2 * Copyright 1991-1996, Silicon Graphics, Inc.
3 * ALL RIGHTS RESERVED
4 *
5 * UNPUBLISHED -- Rights reserved under the copyright laws of the United
6 * States. Use of a copyright notice is precautionary only and does not
7 * imply publication or disclosure.
8 *
9 * U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND:
10 * Use, duplication or disclosure by the Government is subject to restrictions
11 * as set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights
12 * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
13 * in similar or successor clauses in the FAR, or the DOD or NASA FAR
14 * Supplement. Contractor/manufacturer is Silicon Graphics, Inc.,
15 * 2011 N. Shoreline Blvd. Mountain View, CA 94039-7311.
16 *
17 * THE CONTENT OF THIS WORK CONTAINS CONFIDENTIAL AND PROPRIETARY
18 * INFORMATION OF SILICON GRAPHICS, INC. ANY DUPLICATION, MODIFICATION,
19 * DISTRIBUTION, OR DISCLOSURE IN ANY FORM, IN WHOLE, OR IN PART, IS STRICTLY
20 * PROHIBITED WITHOUT THE PRIOR EXPRESS WRITTEN PERMISSION OF SILICON
21 * GRAPHICS, INC.
22**=======================================================================*/
23/*=======================================================================
24** Author : ... (MMM yyyy)
25** Modified by : ... (MMM yyyy)
26**=======================================================================*/
27/*=======================================================================
28 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.), ***
29 *** AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT. ***
30 *** ***
31 *** REPRODUCTION, DISCLOSURE, OR USE, IN WHOLE OR IN PART, OTHER THAN AS ***
32 *** SPECIFIED IN THE LICENSE ARE NOT TO BE UNDERTAKEN EXCEPT WITH PRIOR ***
33 *** WRITTEN AUTHORIZATION OF FEI S.A.S. ***
34 *** ***
35 *** RESTRICTED RIGHTS LEGEND ***
36 *** USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS ***
37 *** WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN ***
38 *** SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT ***
39 *** CLAUSE AT FAR 52.227-19 OR SUBPARAGRAPH (C)(1)(II) OF THE RIGHTS IN ***
40 *** TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013. ***
41 *** ***
42 *** COPYRIGHT (C) 1996-2024 BY FEI S.A.S, ***
43 *** BORDEAUX, FRANCE ***
44 *** ALL RIGHTS RESERVED ***
45**=======================================================================*/
46/*=======================================================================
47** Modified by : VSG (MMM YYYY)
48**=======================================================================*/
49
50#ifndef _SO_SCALE_GESTURE_EVENT_
51#define _SO_SCALE_GESTURE_EVENT_
52
53#include <Inventor/SbBasic.h>
54#include <Inventor/events/SoSubEvent.h>
55#include <Inventor/gestures/events/SoGestureEvent.h>
56
86
87 SO_EVENT_HEADER();
88
89public :
90
93
94 #ifndef HIDDEN_FROM_DOC
95 virtual ~SoScaleGestureEvent();
96 #endif // HIDDEN_FROM_DOC
97
102 float getScaleFactor() const;
103
108 float getDeltaScaleFactor() const;
109
110private:
111 static void initClass();
112 static void exitClass();
113
118 float getFirstDistance() const;
119
124 void setFirstDistance(float d);
125
130 void setScaleFactor(float r);
131
136 void setDeltaScaleFactor(float r);
137
138private :
139 float m_deltaScaleFactor;
140 // The ratio between the current fingers distance and the first distance
141 float m_scaleFactor;
142 // The distance between the two fingers after the second DOWN event.
143 float m_firstDistance;
144};
145
146#endif /* _SO_SCALE_GESTURE_EVENT_ */
147
148
Base class for gesture events.
Class for scale (pinch) gesture events.
float getScaleFactor() const
Gets the ratio between the current fingers distance and the first distance evaluated after the second...
float getDeltaScaleFactor() const
Gets the ratio between the current fingers distance and the previous distance.
SoScaleGestureEvent()
Constructor.