Mercurial > hg > orthanc-stone
comparison OrthancStone/Sources/Scene2DViewport/OneGesturePointerTracker.cpp @ 1512:244ad1e4e76a
reorganization of folders
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 07 Jul 2020 16:21:02 +0200 |
parents | Framework/Scene2DViewport/OneGesturePointerTracker.cpp@30deba7bc8e2 |
children | 85e117739eca |
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1511:9dfeee74c1e6 | 1512:244ad1e4e76a |
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1 /** | |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
5 * Copyright (C) 2017-2020 Osimis S.A., Belgium | |
6 * | |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU Affero General Public License | |
9 * as published by the Free Software Foundation, either version 3 of | |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 * Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 **/ | |
20 | |
21 | |
22 #include "OneGesturePointerTracker.h" | |
23 | |
24 #include <OrthancException.h> | |
25 | |
26 #include "../StoneException.h" | |
27 | |
28 namespace OrthancStone | |
29 { | |
30 OneGesturePointerTracker::OneGesturePointerTracker( | |
31 boost::shared_ptr<IViewport> viewport) | |
32 : viewport_(viewport) | |
33 , alive_(true) | |
34 , currentTouchCount_(1) | |
35 { | |
36 } | |
37 | |
38 void OneGesturePointerTracker::PointerUp(const PointerEvent& event) | |
39 { | |
40 // pointer up is only called for the LAST up event in case of a multi-touch | |
41 // gesture | |
42 ORTHANC_ASSERT(currentTouchCount_ > 0, "Wrong state in tracker"); | |
43 currentTouchCount_--; | |
44 //LOG(TRACE) << "currentTouchCount_ becomes: " << currentTouchCount_; | |
45 if (currentTouchCount_ == 0) | |
46 { | |
47 //LOG(TRACE) << "currentTouchCount_ == 0 --> alive_ = false"; | |
48 alive_ = false; | |
49 } | |
50 } | |
51 | |
52 void OneGesturePointerTracker::PointerDown(const PointerEvent& event) | |
53 { | |
54 // additional touches are not taken into account but we need to count | |
55 // the number of active touches | |
56 currentTouchCount_++; | |
57 //LOG(TRACE) << "currentTouchCount_ becomes: " << currentTouchCount_; | |
58 | |
59 /** | |
60 * 2019-12-06 (SJO): Patch to have consistent behavior when mouse | |
61 * leaves the canvas while the tracker is still active, then | |
62 * button is released while out-of-canvas. Such an event is not | |
63 * caught (at least in WebAssembly), so we delete the tracker on | |
64 * the next click inside the canvas. | |
65 **/ | |
66 alive_ = false; | |
67 } | |
68 | |
69 bool OneGesturePointerTracker::IsAlive() const | |
70 { | |
71 return alive_; | |
72 } | |
73 } |