Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/FixedPointAligner.h @ 1739:9ac2a65d4172
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 06 Jan 2021 17:50:00 +0100 |
parents | 874e178f34e9 |
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 #pragma once | |
23 | |
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24 #include "../../Scene2DViewport/PredeclaredTypes.h" |
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25 #include "../../Scene2D/ScenePoint2D.h" |
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26 #include "../../Viewport/IViewport.h" |
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27 |
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28 #include <boost/weak_ptr.hpp> |
596 | 29 |
30 namespace OrthancStone | |
31 { | |
32 namespace Internals | |
33 { | |
34 // During a mouse event that modifies the view of a scene, keeps | |
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35 // one point (the pivot) at a fixed position on the canvas |
596 | 36 class FixedPointAligner : public boost::noncopyable |
37 { | |
38 private: | |
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39 boost::weak_ptr<IViewport> viewport_; |
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40 ScenePoint2D pivot_; |
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41 ScenePoint2D canvas_; |
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42 |
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43 /** |
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44 This will return a scoped lock to the viewport. |
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45 If the viewport does not exist anymore, then nullptr is returned. |
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46 */ |
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47 IViewport::ILock* GetViewportLock(); |
596 | 48 |
49 public: | |
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50 FixedPointAligner(boost::weak_ptr<IViewport> viewport, |
617 | 51 const ScenePoint2D& p); |
596 | 52 |
53 void Apply(); | |
54 }; | |
55 } | |
56 } |