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comparison Framework/Scene2D/PanSceneTracker.cpp @ 596:b716763571ad

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IPointerTracker
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 26 Apr 2019 17:05:14 +0200
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children 059e1fd05fd6
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595:6e471e6cf09b 596:b716763571ad
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Affero General Public License
9 * as published by the Free Software Foundation, either version 3 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Affero General Public License for more details.
16 *
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 **/
20
21
22 #include "PanSceneTracker.h"
23
24 namespace OrthancStone
25 {
26 PanSceneTracker::PanSceneTracker(Scene2D& scene,
27 const PointerEvent& event) :
28 scene_(scene),
29 originalSceneToCanvas_(scene_.GetSceneToCanvasTransform()),
30 originalCanvasToScene_(scene_.GetCanvasToSceneTransform())
31 {
32 pivot_ = event.GetMainPosition().Apply(originalCanvasToScene_);
33 }
34
35
36 void PanSceneTracker::Update(const PointerEvent& event)
37 {
38 ScenePoint2D p = event.GetMainPosition().Apply(originalCanvasToScene_);
39
40 scene_.SetSceneToCanvasTransform(
41 AffineTransform2D::Combine(
42 originalSceneToCanvas_,
43 AffineTransform2D::CreateOffset(p.GetX() - pivot_.GetX(),
44 p.GetY() - pivot_.GetY())));
45 }
46 }