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comparison Framework/Toolbox/ViewportGeometry.h @ 0:351ab0da0150

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 14 Oct 2016 15:34:11 +0200
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children 7207a407bcd8
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-1:000000000000 0:351ab0da0150
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 *
6 * This program is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
10 *
11 * In addition, as a special exception, the copyright holders of this
12 * program give permission to link the code of its release with the
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
14 * that use the same license as the "OpenSSL" library), and distribute
15 * the linked executables. You must obey the GNU General Public License
16 * in all respects for all of the code used other than "OpenSSL". If you
17 * modify file(s) with this exception, you may extend this exception to
18 * your version of the file(s), but you are not obligated to do so. If
19 * you do not wish to do so, delete this exception statement from your
20 * version. If you delete this exception statement from all source files
21 * in the program, then also delete it here.
22 *
23 * This program is distributed in the hope that it will be useful, but
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 **/
31
32
33 #pragma once
34
35 #include "../Viewport/CairoContext.h"
36
37 namespace OrthancStone
38 {
39 // Not thread-safe
40 class ViewportGeometry
41 {
42 private:
43 // Extent of the scene (in world units)
44 double x1_;
45 double y1_;
46 double x2_;
47 double y2_;
48
49 // Size of the display (in pixels)
50 unsigned int width_;
51 unsigned int height_;
52
53 // Zoom/pan
54 double zoom_;
55 double panX_; // In pixels (display units)
56 double panY_;
57
58 cairo_matrix_t transform_; // Scene-to-display transformation
59
60 void ComputeTransform();
61
62 public:
63 ViewportGeometry();
64
65 void SetDisplaySize(unsigned int width,
66 unsigned int height);
67
68 void SetSceneExtent(double x1,
69 double y1,
70 double x2,
71 double y2);
72
73 void GetSceneExtent(double& x1,
74 double& y1,
75 double& x2,
76 double& y2) const;
77
78 void MapDisplayToScene(double& sceneX /* out */,
79 double& sceneY /* out */,
80 double x,
81 double y) const;
82
83 void MapSceneToDisplay(int& displayX /* out */,
84 int& displayY /* out */,
85 double x,
86 double y) const;
87
88 unsigned int GetDisplayWidth() const
89 {
90 return width_;
91 }
92
93 unsigned int GetDisplayHeight() const
94 {
95 return height_;
96 }
97
98 double GetZoom() const
99 {
100 return zoom_;
101 }
102
103 void SetDefaultView();
104
105 void ApplyTransform(CairoContext& context) const;
106
107 void GetPan(double& x,
108 double& y) const;
109
110 void SetPan(double x,
111 double y);
112
113 void SetZoom(double zoom);
114 };
115 }