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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "WidgetBase.h"
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34
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35 #include "../Orthanc/Core/OrthancException.h"
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36 #include "../Orthanc/Core/Images/ImageProcessing.h"
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37 #include "../Orthanc/Core/Logging.h"
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38
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39 namespace OrthancStone
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40 {
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41 void WidgetBase::ClearBackgroundOrthanc(Orthanc::ImageAccessor& target) const
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42 {
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43 // Clear the background using Orthanc
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44
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45 if (backgroundCleared_)
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46 {
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47 Orthanc::ImageProcessing::Set(target,
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48 backgroundColor_[0],
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49 backgroundColor_[1],
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50 backgroundColor_[2],
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51 255 /* alpha */);
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52 }
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53 }
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54
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55
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56 void WidgetBase::ClearBackgroundCairo(CairoContext& context) const
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57 {
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58 // Clear the background using Cairo
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59
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60 if (IsBackgroundCleared())
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61 {
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62 uint8_t red, green, blue;
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63 GetBackgroundColor(red, green, blue);
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64
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65 context.SetSourceColor(red, green, blue);
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66 cairo_paint(context.GetObject());
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67 }
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68 }
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69
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70
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71 void WidgetBase::ClearBackgroundCairo(Orthanc::ImageAccessor& target) const
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72 {
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73 CairoSurface surface(target);
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74 CairoContext context(surface);
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75 ClearBackgroundCairo(context);
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76 }
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77
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78
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79 void WidgetBase::NotifyChange()
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80 {
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81 observers_.NotifyChange(this);
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82 }
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83
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84
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85 void WidgetBase::UpdateStatusBar(const std::string& message)
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86 {
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87 if (statusBar_ != NULL)
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88 {
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89 statusBar_->SetMessage(message);
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90 }
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91 }
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92
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93
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94 void WidgetBase::WorkerThread(WidgetBase* that)
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95 {
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96 while (that->started_)
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97 {
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98 that->UpdateStep();
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99 }
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100 }
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101
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102
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103 WidgetBase::WidgetBase() :
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104 statusBar_(NULL),
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105 started_(false),
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106 backgroundCleared_(false)
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107 {
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108 backgroundColor_[0] = 0;
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109 backgroundColor_[1] = 0;
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110 backgroundColor_[2] = 0;
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111 }
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112
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113
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114 void WidgetBase::SetBackgroundColor(uint8_t red,
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115 uint8_t green,
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116 uint8_t blue)
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117 {
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118 backgroundColor_[0] = red;
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119 backgroundColor_[1] = green;
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120 backgroundColor_[2] = blue;
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121 }
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122
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123 void WidgetBase::GetBackgroundColor(uint8_t& red,
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124 uint8_t& green,
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125 uint8_t& blue) const
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126 {
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127 red = backgroundColor_[0];
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128 green = backgroundColor_[1];
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129 blue = backgroundColor_[2];
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130 }
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131
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132
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133 void WidgetBase::Register(IChangeObserver& observer)
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134 {
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135 observers_.Register(observer);
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136 }
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137
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138
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139 void WidgetBase::Unregister(IChangeObserver& observer)
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140 {
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141 observers_.Unregister(observer);
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142 }
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143
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144
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145 void WidgetBase::Start()
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146 {
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147 if (started_)
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148 {
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149 LOG(ERROR) << "Cannot Start() twice";
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150 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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151 }
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152
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153 started_ = true;
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154
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155 if (HasUpdateThread())
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156 {
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157 thread_ = boost::thread(WorkerThread, this);
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158 }
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159 }
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160
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161
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162 void WidgetBase::Stop()
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163 {
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164 if (!started_)
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165 {
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166 LOG(ERROR) << "Cannot Stop() if Start() has not been invoked";
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167 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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168 }
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169
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170 started_ = false;
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171
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172 if (HasUpdateThread() &&
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173 thread_.joinable())
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174 {
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175 thread_.join();
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176 }
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177 }
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178
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179
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180 bool WidgetBase::Render(Orthanc::ImageAccessor& surface)
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181 {
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182 #if 0
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183 ClearBackgroundOrthanc(surface);
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184 #else
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185 ClearBackgroundCairo(surface); // Faster than Orthanc
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186 #endif
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187
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188 return true;
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189 }
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190 }
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