Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2DViewport/OneGesturePointerTracker.cpp @ 1852:5ead1852095a StoneWebViewer-2.1
StoneWebViewer-2.1
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 29 Jun 2021 16:26:47 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
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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) 2017-2021 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU Lesser General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
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20 **/ |
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21 |
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22 |
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23 #include "OneGesturePointerTracker.h" |
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25 #include <OrthancException.h> |
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26 |
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27 #include "../StoneException.h" |
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28 |
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29 namespace OrthancStone |
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30 { |
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31 OneGesturePointerTracker::OneGesturePointerTracker(boost::weak_ptr<IViewport> viewport) : |
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33 currentTouchCount_(1), | |
34 viewport_(viewport) | |
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35 { |
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36 } |
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37 |
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38 IViewport::ILock* OneGesturePointerTracker::GetViewportLock() |
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39 { |
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40 boost::shared_ptr<IViewport> viewport = viewport_.lock(); |
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41 if (viewport) |
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42 return viewport->Lock(); |
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43 else |
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44 return NULL; |
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45 } |
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46 |
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47 void OneGesturePointerTracker::PointerUp(const PointerEvent& event) |
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48 { |
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49 // pointer up is only called for the LAST up event in case of a multi-touch |
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50 // gesture |
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51 ORTHANC_ASSERT(currentTouchCount_ > 0, "Wrong state in tracker"); |
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52 currentTouchCount_--; |
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53 //LOG(TRACE) << "currentTouchCount_ becomes: " << currentTouchCount_; |
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54 if (currentTouchCount_ == 0) |
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55 { |
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56 //LOG(TRACE) << "currentTouchCount_ == 0 --> alive_ = false"; |
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57 alive_ = false; |
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58 } |
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59 } |
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60 |
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61 void OneGesturePointerTracker::PointerDown(const PointerEvent& event) |
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62 { |
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63 // additional touches are not taken into account but we need to count |
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64 // the number of active touches |
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65 currentTouchCount_++; |
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66 //LOG(TRACE) << "currentTouchCount_ becomes: " << currentTouchCount_; |
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67 |
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68 /** |
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69 * 2019-12-06 (SJO): Patch to have consistent behavior when mouse |
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70 * leaves the canvas while the tracker is still active, then |
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71 * button is released while out-of-canvas. Such an event is not |
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72 * caught (at least in WebAssembly), so we delete the tracker on |
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73 * the next click inside the canvas. |
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74 **/ |
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75 alive_ = false; |
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76 } |
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77 |
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78 bool OneGesturePointerTracker::IsAlive() const |
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79 { |
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80 return alive_; |
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81 } |
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82 } |