Mercurial > hg > orthanc-stone
diff OrthancStone/Sources/Scene2D/MagnifyingGlassTracker.cpp @ 1993:317a53d4fdc6
added magnifying glass
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Mon, 31 Oct 2022 22:19:57 +0100 |
parents | |
children | 2f242d231a22 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OrthancStone/Sources/Scene2D/MagnifyingGlassTracker.cpp Mon Oct 31 22:19:57 2022 +0100 @@ -0,0 +1,94 @@ +/** + * 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 "MagnifyingGlassTracker.h" + +#include "../Scene2DViewport/ViewportController.h" +#include "../Viewport/ViewportLocker.h" + +namespace OrthancStone +{ + void MagnifyingGlassTracker::Update(ViewportLocker& locker, + const PointerEvent& event) + { + ScenePoint2D p = event.GetMainPosition().Apply(originalCanvasToScene_); + + locker.GetController().SetSceneToCanvasTransform( + AffineTransform2D::Combine( + originalSceneToCanvas_, + AffineTransform2D::CreateOffset(p.GetX(), p.GetY()), + AffineTransform2D::CreateScaling(5, 5), + AffineTransform2D::CreateOffset(-pivot_.GetX(), -pivot_.GetY()))); + + locker.Invalidate(); + } + + + MagnifyingGlassTracker::MagnifyingGlassTracker(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(locker.GetController().GetCanvasToSceneTransform()); + + Update(locker, event); + } + } + + + void MagnifyingGlassTracker::PointerUp(const PointerEvent& event, + const Scene2D& scene) + { + Cancel(scene); + OneGesturePointerTracker::PointerUp(event, scene); + } + + + void MagnifyingGlassTracker::PointerMove(const PointerEvent& event, + const Scene2D& scene) + { + ViewportLocker locker(viewport_); + + if (locker.IsValid()) + { + Update(locker, event); + } + } + + + void MagnifyingGlassTracker::Cancel(const Scene2D& scene) + { + ViewportLocker locker(viewport_); + + if (locker.IsValid()) + { + locker.GetController().SetSceneToCanvasTransform(originalSceneToCanvas_); + locker.Invalidate(); + } + } +}