Mercurial > hg > orthanc-stone
view OrthancStone/Sources/Scene2DViewport/OneGesturePointerTracker.cpp @ 2135:6cc11bd11890 dicom-sr
integration mainline->dicom-sr
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 30 May 2024 21:31:55 +0200 |
parents | 16c01cc201e7 |
children |
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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 "OneGesturePointerTracker.h" #include <OrthancException.h> #include "../StoneException.h" namespace OrthancStone { OneGesturePointerTracker::OneGesturePointerTracker() : alive_(true), currentTouchCount_(1) { } void OneGesturePointerTracker::PointerUp(const PointerEvent& event, const Scene2D& scene) { // 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, const Scene2D& scene) { // 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_; } }