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annotate OrthancStone/Sources/Scene2D/Internals/FixedPointAligner.h @ 1606:874e178f34e9

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- ViewportController now has weak ptr to Viewport - Measuring tools + related commands and all trackers now store only a weak_ptr to the Viewport and lock() on demand for usage - LayerHolder and FixedPoint aligner store only a weak_ptr to the Viewport, too - Fixed float/double warning in GrayscaleWindowingSceneTracker
author Benjamin Golinvaux <bgo@osimis.io>
date Wed, 28 Oct 2020 20:14:34 +0100
parents 8563ea5d8ae4
children 9ac2a65d4172
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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) 2017-2020 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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22 #pragma once
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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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28 #include <boost/weak_ptr.hpp>
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30 namespace OrthancStone
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31 {
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32 namespace Internals
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33 {
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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
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36 class FixedPointAligner : public boost::noncopyable
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37 {
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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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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();
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49 public:
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50 FixedPointAligner(boost::weak_ptr<IViewport> viewport,
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51 const ScenePoint2D& p);
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53 void Apply();
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54 };
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55 }
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56 }