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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 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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22
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23
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24 #include "MagnifyingGlassTracker.h"
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25
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26 #include "../Scene2DViewport/ViewportController.h"
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27 #include "../Viewport/ViewportLocker.h"
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28
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29 namespace OrthancStone
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30 {
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31 void MagnifyingGlassTracker::Update(ViewportLocker& locker,
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32 const PointerEvent& event)
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33 {
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34 ScenePoint2D p = event.GetMainPosition().Apply(originalCanvasToScene_);
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35
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36 locker.GetController().SetSceneToCanvasTransform(
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37 AffineTransform2D::Combine(
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38 originalSceneToCanvas_,
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39 AffineTransform2D::CreateOffset(p.GetX(), p.GetY()),
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40 AffineTransform2D::CreateScaling(5, 5),
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41 AffineTransform2D::CreateOffset(-pivot_.GetX(), -pivot_.GetY())));
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42
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43 locker.Invalidate();
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44 }
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45
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46
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47 MagnifyingGlassTracker::MagnifyingGlassTracker(boost::weak_ptr<IViewport> viewport,
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48 const PointerEvent& event) :
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49 viewport_(viewport)
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50 {
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51 ViewportLocker locker(viewport_);
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52
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53 if (locker.IsValid())
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54 {
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55 originalSceneToCanvas_ = locker.GetController().GetSceneToCanvasTransform();
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56 originalCanvasToScene_ = locker.GetController().GetCanvasToSceneTransform();
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57 pivot_ = event.GetMainPosition().Apply(locker.GetController().GetCanvasToSceneTransform());
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58
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59 Update(locker, event);
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60 }
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61 }
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62
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63
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64 void MagnifyingGlassTracker::PointerUp(const PointerEvent& event,
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65 const Scene2D& scene)
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66 {
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67 Cancel(scene);
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68 OneGesturePointerTracker::PointerUp(event, scene);
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69 }
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70
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71
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72 void MagnifyingGlassTracker::PointerMove(const PointerEvent& event,
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73 const Scene2D& scene)
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74 {
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75 ViewportLocker locker(viewport_);
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76
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77 if (locker.IsValid())
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78 {
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79 Update(locker, event);
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80 }
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81 }
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82
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83
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84 void MagnifyingGlassTracker::Cancel(const Scene2D& scene)
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85 {
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86 ViewportLocker locker(viewport_);
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87
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88 if (locker.IsValid())
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89 {
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90 locker.GetController().SetSceneToCanvasTransform(originalSceneToCanvas_);
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91 locker.Invalidate();
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92 }
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93 }
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94 }
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