Mercurial > hg > orthanc-stone
view OrthancStone/Sources/Scene2D/PanSceneTracker.cpp @ 2181:eae006bfeea6 default tip
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 26 Nov 2024 16:37:46 +0100 |
parents | 16c01cc201e7 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2023 Osimis S.A., Belgium * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, 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/>. **/ #include "PanSceneTracker.h" #include "../Scene2DViewport/ViewportController.h" #include "../Viewport/ViewportLocker.h" namespace OrthancStone { PanSceneTracker::PanSceneTracker(boost::weak_ptr<IViewport> viewport, const PointerEvent& event) : viewport_(viewport) { ViewportLocker locker(viewport_); if (locker.IsValid()) { originalSceneToCanvas_ = locker.GetController().GetSceneToCanvasTransform(); originalCanvasToScene_ = locker.GetController().GetCanvasToSceneTransform(); pivot_ = event.GetMainPosition().Apply(originalCanvasToScene_); } } void PanSceneTracker::PointerMove(const PointerEvent& event, const Scene2D& scene) { ScenePoint2D p = event.GetMainPosition().Apply(originalCanvasToScene_); ViewportLocker locker(viewport_); if (locker.IsValid()) { locker.GetController().SetSceneToCanvasTransform( AffineTransform2D::Combine( originalSceneToCanvas_, AffineTransform2D::CreateOffset(p.GetX() - pivot_.GetX(), p.GetY() - pivot_.GetY()))); locker.Invalidate(); } } void PanSceneTracker::Cancel(const Scene2D& scene) { ViewportLocker locker(viewport_); if (locker.IsValid()) { locker.GetController().SetSceneToCanvasTransform(originalSceneToCanvas_); } } }