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comparison Framework/Widgets/WidgetBase.cpp @ 0:351ab0da0150

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initial commit
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 14 Oct 2016 15:34:11 +0200
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children ff1e935768e7
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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 #include "WidgetBase.h"
34
35 #include "../Orthanc/Core/OrthancException.h"
36 #include "../Orthanc/Core/Images/ImageProcessing.h"
37 #include "../Orthanc/Core/Logging.h"
38
39 namespace OrthancStone
40 {
41 void WidgetBase::ClearBackgroundOrthanc(Orthanc::ImageAccessor& target) const
42 {
43 // Clear the background using Orthanc
44
45 if (backgroundCleared_)
46 {
47 Orthanc::ImageProcessing::Set(target,
48 backgroundColor_[0],
49 backgroundColor_[1],
50 backgroundColor_[2],
51 255 /* alpha */);
52 }
53 }
54
55
56 void WidgetBase::ClearBackgroundCairo(CairoContext& context) const
57 {
58 // Clear the background using Cairo
59
60 if (IsBackgroundCleared())
61 {
62 uint8_t red, green, blue;
63 GetBackgroundColor(red, green, blue);
64
65 context.SetSourceColor(red, green, blue);
66 cairo_paint(context.GetObject());
67 }
68 }
69
70
71 void WidgetBase::ClearBackgroundCairo(Orthanc::ImageAccessor& target) const
72 {
73 CairoSurface surface(target);
74 CairoContext context(surface);
75 ClearBackgroundCairo(context);
76 }
77
78
79 void WidgetBase::NotifyChange()
80 {
81 observers_.NotifyChange(this);
82 }
83
84
85 void WidgetBase::UpdateStatusBar(const std::string& message)
86 {
87 if (statusBar_ != NULL)
88 {
89 statusBar_->SetMessage(message);
90 }
91 }
92
93
94 void WidgetBase::WorkerThread(WidgetBase* that)
95 {
96 while (that->started_)
97 {
98 that->UpdateStep();
99 }
100 }
101
102
103 WidgetBase::WidgetBase() :
104 statusBar_(NULL),
105 started_(false),
106 backgroundCleared_(false)
107 {
108 backgroundColor_[0] = 0;
109 backgroundColor_[1] = 0;
110 backgroundColor_[2] = 0;
111 }
112
113
114 void WidgetBase::SetBackgroundColor(uint8_t red,
115 uint8_t green,
116 uint8_t blue)
117 {
118 backgroundColor_[0] = red;
119 backgroundColor_[1] = green;
120 backgroundColor_[2] = blue;
121 }
122
123 void WidgetBase::GetBackgroundColor(uint8_t& red,
124 uint8_t& green,
125 uint8_t& blue) const
126 {
127 red = backgroundColor_[0];
128 green = backgroundColor_[1];
129 blue = backgroundColor_[2];
130 }
131
132
133 void WidgetBase::Register(IChangeObserver& observer)
134 {
135 observers_.Register(observer);
136 }
137
138
139 void WidgetBase::Unregister(IChangeObserver& observer)
140 {
141 observers_.Unregister(observer);
142 }
143
144
145 void WidgetBase::Start()
146 {
147 if (started_)
148 {
149 LOG(ERROR) << "Cannot Start() twice";
150 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
151 }
152
153 started_ = true;
154
155 if (HasUpdateThread())
156 {
157 thread_ = boost::thread(WorkerThread, this);
158 }
159 }
160
161
162 void WidgetBase::Stop()
163 {
164 if (!started_)
165 {
166 LOG(ERROR) << "Cannot Stop() if Start() has not been invoked";
167 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
168 }
169
170 started_ = false;
171
172 if (HasUpdateThread() &&
173 thread_.joinable())
174 {
175 thread_.join();
176 }
177 }
178
179
180 bool WidgetBase::Render(Orthanc::ImageAccessor& surface)
181 {
182 #if 0
183 ClearBackgroundOrthanc(surface);
184 #else
185 ClearBackgroundCairo(surface); // Faster than Orthanc
186 #endif
187
188 return true;
189 }
190 }