Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/ZoomSceneTracker.cpp @ 1750:5f74ebe2516b
fixed includes
author | Benjamin Golinvaux <bgo@osimis.io> |
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date | Mon, 22 Feb 2021 14:56:06 +0100 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
rev | line source |
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596 | 1 /** |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium |
596 | 6 * |
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 |
596 | 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 | |
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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/>. |
596 | 20 **/ |
21 | |
22 | |
23 #include "ZoomSceneTracker.h" | |
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24 #include "../Scene2DViewport/ViewportController.h" |
596 | 25 |
26 namespace OrthancStone | |
27 { | |
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28 ZoomSceneTracker::ZoomSceneTracker(boost::weak_ptr<IViewport> viewport, |
596 | 29 const PointerEvent& event, |
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30 unsigned int canvasHeight) |
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31 : OneGesturePointerTracker(viewport) |
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32 , clickY_(event.GetMainPosition().GetY()) |
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33 , aligner_(viewport, event.GetMainPosition()) |
596 | 34 { |
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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 |
596 | 39 if (canvasHeight <= 3) |
40 { | |
41 active_ = false; | |
42 } | |
43 else | |
44 { | |
45 normalization_ = 1.0 / static_cast<double>(canvasHeight - 1); | |
46 active_ = true; | |
47 } | |
48 } | |
49 | |
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50 void ZoomSceneTracker::PointerMove(const PointerEvent& event) |
596 | 51 { |
52 static const double MIN_ZOOM = -4; | |
53 static const double MAX_ZOOM = 4; | |
54 | |
55 if (active_) | |
56 { | |
57 double y = event.GetMainPosition().GetY(); | |
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58 |
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59 // In the range [-1,1] |
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60 double dy = static_cast<double>(y - clickY_) * normalization_; |
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61 |
596 | 62 double z; |
63 | |
64 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] | |
65 if (dy < -1.0) | |
66 { | |
67 z = MIN_ZOOM; | |
68 } | |
69 else if (dy > 1.0) | |
70 { | |
71 z = MAX_ZOOM; | |
72 } | |
73 else | |
74 { | |
75 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; | |
76 } | |
77 | |
78 double zoom = pow(2.0, z); | |
79 | |
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80 std::unique_ptr<IViewport::ILock> lock(GetViewportLock()); |
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81 lock->GetController().SetSceneToCanvasTransform( |
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82 AffineTransform2D::Combine( |
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83 AffineTransform2D::CreateScaling(zoom, zoom), |
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84 originalSceneToCanvas_)); |
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85 aligner_.Apply(); |
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86 lock->Invalidate(); |
596 | 87 } |
88 } | |
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89 |
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90 void ZoomSceneTracker::Cancel() |
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91 { |
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92 std::unique_ptr<IViewport::ILock> lock(GetViewportLock()); |
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93 lock->GetController().SetSceneToCanvasTransform(originalSceneToCanvas_); |
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94 lock->Invalidate(); |
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95 } |
596 | 96 } |