view Framework/Scene2D/PanSceneTracker.cpp @ 923:6b81c5453382

RadiographyScene: avoid exporting to width+1 image size due to numerical noise in GetSceneExtent()
author Alain Mazy <alain@mazy.be>
date Mon, 22 Jul 2019 14:28:56 +0200
parents e42b491f1fb2
children 13e078adfb94
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/**
 * Stone of Orthanc
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2019 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 "PanSceneTracker.h"
#include "../Scene2DViewport/ViewportController.h"

namespace OrthancStone
{
  PanSceneTracker::PanSceneTracker(boost::weak_ptr<ViewportController> controllerW,
                                   const PointerEvent& event)
    : OneGesturePointerTracker(controllerW)
    , originalSceneToCanvas_(GetController()->GetSceneToCanvasTransform())
    , originalCanvasToScene_(GetController()->GetCanvasToSceneTransform())
  {
    pivot_ = event.GetMainPosition().Apply(originalCanvasToScene_);
  }


  void PanSceneTracker::PointerMove(const PointerEvent& event)
  {
    ScenePoint2D p = event.GetMainPosition().Apply(originalCanvasToScene_);
      
    GetController()->SetSceneToCanvasTransform(
      AffineTransform2D::Combine(
        originalSceneToCanvas_,
        AffineTransform2D::CreateOffset(p.GetX() - pivot_.GetX(),
                                        p.GetY() - pivot_.GetY())));
  }

  void PanSceneTracker::Cancel()
  {
    GetController()->SetSceneToCanvasTransform(originalSceneToCanvas_);
  }

}