Mercurial > hg > orthanc-stone

comparison Framework/Deprecated/Widgets/ZoomMouseTracker.cpp @ 732:c35e98d22764

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
move Deprecated classes to a separate folder
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 21 May 2019 14:27:35 +0200
parents Framework/Widgets/ZoomMouseTracker.cpp@4f2416d519b4
children 2d8ab34c8c91
comparison
equal deleted inserted replaced
729:529189f399ec 732:c35e98d22764
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 "ZoomMouseTracker.h"
23
24 #include <Core/Logging.h>
25 #include <Core/OrthancException.h>
26
27 namespace Deprecated
28 {
29 ZoomMouseTracker::ZoomMouseTracker(WorldSceneWidget& that,
30 int x,
31 int y) :
32 that_(that),
33 originalZoom_(that.GetView().GetZoom()),
34 downX_(x),
35 downY_(y)
36 {
37 that.GetView().MapPixelCenterToScene(centerX_, centerY_, x, y);
38
39 unsigned int height = that.GetView().GetDisplayHeight();
40
41 if (height <= 3)
42 {
43 idle_ = true;
44 LOG(WARNING) << "image is too small to zoom (current height = " << height << ")";
45 }
46 else
47 {
48 idle_ = false;
49 normalization_ = 1.0 / static_cast<double>(height - 1);
50 }
51 }
52
53
54 void ZoomMouseTracker::Render(OrthancStone::CairoContext& context,
55 double zoom)
56 {
57 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
58 }
59
60
61 void ZoomMouseTracker::MouseMove(int displayX,
62 int displayY,
63 double x,
64 double y,
65 const std::vector<Touch>& displayTouches,
66 const std::vector<Touch>& sceneTouches)
67 {
68 static const double MIN_ZOOM = -4;
69 static const double MAX_ZOOM = 4;
70
71
72 if (!idle_)
73 {
74 double dy = static_cast<double>(displayY - downY_) * normalization_; // In the range [-1,1]
75 double z;
76
77 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM]
78 if (dy < -1.0)
79 {
80 z = MIN_ZOOM;
81 }
82 else if (dy > 1.0)
83 {
84 z = MAX_ZOOM;
85 }
86 else
87 {
88 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0;
89 }
90
91 z = pow(2.0, z);
92
93 ViewportGeometry view = that_.GetView();
94
95 view.SetZoom(z * originalZoom_);
96
97 // Correct the pan so that the original click point is kept at
98 // the same location on the display
99 double panX, panY;
100 view.GetPan(panX, panY);
101
102 int tx, ty;
103 view.MapSceneToDisplay(tx, ty, centerX_, centerY_);
104 view.SetPan(panX + static_cast<double>(downX_ - tx),
105 panY + static_cast<double>(downY_ - ty));
106
107 that_.SetView(view);
108 }
109 }
110 }