Mercurial > hg > orthanc-stone
view OrthancStone/Sources/Scene2D/ZoomSceneTracker.cpp @ 1960:40f8009ceb4e
added compatibility against release 1.10.1 of the DICOMweb plugin
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 27 Oct 2022 17:17:14 +0200 |
parents | 7053b8a0aaec |
children | 9c0adcc8feec |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2022 Osimis S.A., Belgium * Copyright (C) 2021-2022 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 "ZoomSceneTracker.h" #include "../Scene2DViewport/ViewportController.h" namespace OrthancStone { ZoomSceneTracker::ZoomSceneTracker(boost::weak_ptr<IViewport> viewport, const PointerEvent& event, unsigned int canvasHeight) : OneGesturePointerTracker(viewport) , clickY_(event.GetMainPosition().GetY()) , aligner_(viewport, event.GetMainPosition()) { std::unique_ptr<IViewport::ILock> lock(GetViewportLock()); originalSceneToCanvas_ = lock->GetController().GetSceneToCanvasTransform(); if (canvasHeight <= 3) { active_ = false; } else { normalization_ = 1.0 / static_cast<double>(canvasHeight - 1); active_ = true; } } void ZoomSceneTracker::PointerMove(const PointerEvent& event) { static const double MIN_ZOOM = -4; static const double MAX_ZOOM = 4; if (active_) { double y = event.GetMainPosition().GetY(); // In the range [-1,1] double dy = static_cast<double>(y - clickY_) * normalization_; double z; // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] if (dy < -1.0) { z = MIN_ZOOM; } else if (dy > 1.0) { z = MAX_ZOOM; } else { z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; } double zoom = pow(2.0, z); std::unique_ptr<IViewport::ILock> lock(GetViewportLock()); lock->GetController().SetSceneToCanvasTransform( AffineTransform2D::Combine( AffineTransform2D::CreateScaling(zoom, zoom), originalSceneToCanvas_)); aligner_.Apply(); lock->Invalidate(); } } void ZoomSceneTracker::Cancel() { std::unique_ptr<IViewport::ILock> lock(GetViewportLock()); lock->GetController().SetSceneToCanvasTransform(originalSceneToCanvas_); lock->Invalidate(); } }