Mercurial > hg > orthanc-stone
diff OrthancStone/Sources/Scene2DViewport/OneGesturePointerTracker.cpp @ 1512:244ad1e4e76a
reorganization of folders
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 07 Jul 2020 16:21:02 +0200 |
parents | Framework/Scene2DViewport/OneGesturePointerTracker.cpp@30deba7bc8e2 |
children | 85e117739eca |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OrthancStone/Sources/Scene2DViewport/OneGesturePointerTracker.cpp Tue Jul 07 16:21:02 2020 +0200 @@ -0,0 +1,73 @@ +/** + * Stone of Orthanc + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * Copyright (C) 2017-2020 Osimis S.A., Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU Affero 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 + * Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#include "OneGesturePointerTracker.h" + +#include <OrthancException.h> + +#include "../StoneException.h" + +namespace OrthancStone +{ + OneGesturePointerTracker::OneGesturePointerTracker( + boost::shared_ptr<IViewport> viewport) + : viewport_(viewport) + , alive_(true) + , currentTouchCount_(1) + { + } + + void OneGesturePointerTracker::PointerUp(const PointerEvent& event) + { + // pointer up is only called for the LAST up event in case of a multi-touch + // gesture + ORTHANC_ASSERT(currentTouchCount_ > 0, "Wrong state in tracker"); + currentTouchCount_--; + //LOG(TRACE) << "currentTouchCount_ becomes: " << currentTouchCount_; + if (currentTouchCount_ == 0) + { + //LOG(TRACE) << "currentTouchCount_ == 0 --> alive_ = false"; + alive_ = false; + } + } + + void OneGesturePointerTracker::PointerDown(const PointerEvent& event) + { + // additional touches are not taken into account but we need to count + // the number of active touches + currentTouchCount_++; + //LOG(TRACE) << "currentTouchCount_ becomes: " << currentTouchCount_; + + /** + * 2019-12-06 (SJO): Patch to have consistent behavior when mouse + * leaves the canvas while the tracker is still active, then + * button is released while out-of-canvas. Such an event is not + * caught (at least in WebAssembly), so we delete the tracker on + * the next click inside the canvas. + **/ + alive_ = false; + } + + bool OneGesturePointerTracker::IsAlive() const + { + return alive_; + } +}