annotate OrthancStone/Sources/Scene2DViewport/OneGesturePointerTracker.cpp @ 2114:c23eef785569

update year to 2024
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 24 Jan 2024 16:44:04 +0100
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2024 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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23
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24 #include "OneGesturePointerTracker.h"
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25
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26 #include <OrthancException.h>
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27
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28 #include "../StoneException.h"
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29
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30 namespace OrthancStone
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31 {
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32 OneGesturePointerTracker::OneGesturePointerTracker() :
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33 alive_(true),
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34 currentTouchCount_(1)
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35 {
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36 }
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37
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38 void OneGesturePointerTracker::PointerUp(const PointerEvent& event,
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39 const Scene2D& scene)
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40 {
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41 // pointer up is only called for the LAST up event in case of a multi-touch
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42 // gesture
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43 ORTHANC_ASSERT(currentTouchCount_ > 0, "Wrong state in tracker");
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44 currentTouchCount_--;
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45 //LOG(TRACE) << "currentTouchCount_ becomes: " << currentTouchCount_;
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46 if (currentTouchCount_ == 0)
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47 {
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48 //LOG(TRACE) << "currentTouchCount_ == 0 --> alive_ = false";
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49 alive_ = false;
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50 }
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51 }
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52
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53 void OneGesturePointerTracker::PointerDown(const PointerEvent& event,
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54 const Scene2D& scene)
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55 {
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56 // additional touches are not taken into account but we need to count
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57 // the number of active touches
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58 currentTouchCount_++;
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59 //LOG(TRACE) << "currentTouchCount_ becomes: " << currentTouchCount_;
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61 /**
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62 * 2019-12-06 (SJO): Patch to have consistent behavior when mouse
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63 * leaves the canvas while the tracker is still active, then
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64 * button is released while out-of-canvas. Such an event is not
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65 * caught (at least in WebAssembly), so we delete the tracker on
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66 * the next click inside the canvas.
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67 **/
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68 alive_ = false;
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69 }
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71 bool OneGesturePointerTracker::IsAlive() const
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72 {
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73 return alive_;
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74 }
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75 }