Mercurial > hg > orthanc-stone
view OrthancStone/Sources/Scene2D/Internals/FixedPointAligner.h @ 1852:5ead1852095a StoneWebViewer-2.1
StoneWebViewer-2.1
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 29 Jun 2021 16:26:47 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2021 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/>. **/ #pragma once #include "../../Scene2DViewport/PredeclaredTypes.h" #include "../../Scene2D/ScenePoint2D.h" #include "../../Viewport/IViewport.h" #include <boost/weak_ptr.hpp> namespace OrthancStone { namespace Internals { // During a mouse event that modifies the view of a scene, keeps // one point (the pivot) at a fixed position on the canvas class FixedPointAligner : public boost::noncopyable { private: boost::weak_ptr<IViewport> viewport_; ScenePoint2D pivot_; ScenePoint2D canvas_; /** This will return a scoped lock to the viewport. If the viewport does not exist anymore, then nullptr is returned. */ IViewport::ILock* GetViewportLock(); public: FixedPointAligner(boost::weak_ptr<IViewport> viewport, const ScenePoint2D& p); void Apply(); }; } }