Mercurial > hg > orthanc-stone
view OrthancStone/Sources/Scene2DViewport/OneGesturePointerTracker.h @ 1731:816e1634f221 StoneWebViewer-1.0
StoneWebViewer-1.0
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Wed, 02 Dec 2020 13:19:15 +0100 |
parents | 874e178f34e9 |
children | 9ac2a65d4172 |
line wrap: on
line source
/** * 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 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/>. **/ #pragma once #include "IFlexiblePointerTracker.h" #include "../Viewport/IViewport.h" #include <Compatibility.h> // For ORTHANC_OVERRIDE #include <boost/shared_ptr.hpp> #include <boost/weak_ptr.hpp> namespace OrthancStone { /** This base is class allows to write simple trackers that deal with single drag gestures with only one touch. It is *not* suitable for multi-touch and multi-state trackers where various mouse operations need to be handled. In order to write such a tracker: - subclass this class - you may store the initial click/touch position in the constructor - implement PointerMove to react to pointer/touch events - implement Cancel to restore the state at initial tracker creation time */ class OneGesturePointerTracker : public IFlexiblePointerTracker { private: bool alive_; int currentTouchCount_; protected: boost::weak_ptr<IViewport> viewport_; /** This will return a scoped lock to the viewport. If the viewport does not exist anymore, then nullptr is returned. */ IViewport::ILock* GetViewportLock(); public: explicit OneGesturePointerTracker(boost::weak_ptr<IViewport> viewport); virtual void PointerUp(const PointerEvent& event) ORTHANC_OVERRIDE; virtual void PointerDown(const PointerEvent& event) ORTHANC_OVERRIDE; virtual bool IsAlive() const ORTHANC_OVERRIDE; }; }