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annotate OrthancStone/Sources/Scene2D/RotateSceneTracker.cpp @ 1870:3889ae96d2e9

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added copyright UCLouvain
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 11:04:09 +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) 2017-2021 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2021 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 #include "RotateSceneTracker.h"
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24 #include "../Scene2DViewport/ViewportController.h"
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26 namespace OrthancStone
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27 {
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28 RotateSceneTracker::RotateSceneTracker(boost::weak_ptr<IViewport> viewport,
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29 const PointerEvent& event) :
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30 OneGesturePointerTracker(viewport),
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31 click_(event.GetMainPosition()),
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32 aligner_(viewport, click_),
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33 referenceAngle_(0),
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34 isFirst_(true)
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35 {
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36 std::unique_ptr<IViewport::ILock> lock(GetViewportLock());
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37 originalSceneToCanvas_ = lock->GetController().GetSceneToCanvasTransform();
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38 }
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40
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41 void RotateSceneTracker::PointerMove(const PointerEvent& event)
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42 {
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43 ScenePoint2D p = event.GetMainPosition();
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44 double dx = p.GetX() - click_.GetX();
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45 double dy = p.GetY() - click_.GetY();
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47 if (std::abs(dx) > 5.0 ||
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48 std::abs(dy) > 5.0)
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49 {
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50 double a = atan2(dy, dx);
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52 if (isFirst_)
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53 {
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54 referenceAngle_ = a;
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55 isFirst_ = false;
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56 }
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57
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58 std::unique_ptr<IViewport::ILock> lock(GetViewportLock());
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60 lock->GetController().SetSceneToCanvasTransform(
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61 AffineTransform2D::Combine(
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62 AffineTransform2D::CreateRotation(a - referenceAngle_),
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63 originalSceneToCanvas_));
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64 aligner_.Apply();
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65 lock->Invalidate();
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66 }
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67 }
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70 void RotateSceneTracker::Cancel()
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71 {
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72 // See remark above
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73 std::unique_ptr<IViewport::ILock> lock(GetViewportLock());
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74 lock->GetController().SetSceneToCanvasTransform(originalSceneToCanvas_);
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75 lock->Invalidate();
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76 }
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77 }