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comparison OrthancStone/Sources/Scene2D/MagnifyingGlassTracker.cpp @ 1993:317a53d4fdc6

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added magnifying glass
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 31 Oct 2022 22:19:57 +0100
parents
children 2f242d231a22
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1992:237e0eb40f38 1993:317a53d4fdc6
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2022 Osimis S.A., Belgium
6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
7 *
8 * This program is free software: you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation, either version 3 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this program. If not, see
20 * <http://www.gnu.org/licenses/>.
21 **/
22
23
24 #include "MagnifyingGlassTracker.h"
25
26 #include "../Scene2DViewport/ViewportController.h"
27 #include "../Viewport/ViewportLocker.h"
28
29 namespace OrthancStone
30 {
31 void MagnifyingGlassTracker::Update(ViewportLocker& locker,
32 const PointerEvent& event)
33 {
34 ScenePoint2D p = event.GetMainPosition().Apply(originalCanvasToScene_);
35
36 locker.GetController().SetSceneToCanvasTransform(
37 AffineTransform2D::Combine(
38 originalSceneToCanvas_,
39 AffineTransform2D::CreateOffset(p.GetX(), p.GetY()),
40 AffineTransform2D::CreateScaling(5, 5),
41 AffineTransform2D::CreateOffset(-pivot_.GetX(), -pivot_.GetY())));
42
43 locker.Invalidate();
44 }
45
46
47 MagnifyingGlassTracker::MagnifyingGlassTracker(boost::weak_ptr<IViewport> viewport,
48 const PointerEvent& event) :
49 viewport_(viewport)
50 {
51 ViewportLocker locker(viewport_);
52
53 if (locker.IsValid())
54 {
55 originalSceneToCanvas_ = locker.GetController().GetSceneToCanvasTransform();
56 originalCanvasToScene_ = locker.GetController().GetCanvasToSceneTransform();
57 pivot_ = event.GetMainPosition().Apply(locker.GetController().GetCanvasToSceneTransform());
58
59 Update(locker, event);
60 }
61 }
62
63
64 void MagnifyingGlassTracker::PointerUp(const PointerEvent& event,
65 const Scene2D& scene)
66 {
67 Cancel(scene);
68 OneGesturePointerTracker::PointerUp(event, scene);
69 }
70
71
72 void MagnifyingGlassTracker::PointerMove(const PointerEvent& event,
73 const Scene2D& scene)
74 {
75 ViewportLocker locker(viewport_);
76
77 if (locker.IsValid())
78 {
79 Update(locker, event);
80 }
81 }
82
83
84 void MagnifyingGlassTracker::Cancel(const Scene2D& scene)
85 {
86 ViewportLocker locker(viewport_);
87
88 if (locker.IsValid())
89 {
90 locker.GetController().SetSceneToCanvasTransform(originalSceneToCanvas_);
91 locker.Invalidate();
92 }
93 }
94 }