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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 "WidgetViewport.h"
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34
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35 #include "../Orthanc/Core/Images/ImageProcessing.h"
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36 #include "../Orthanc/Core/OrthancException.h"
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37
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38 namespace OrthancStone
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39 {
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40 void WidgetViewport::UnregisterCentralWidget()
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41 {
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42 mouseTracker_.reset(NULL);
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43
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44 if (centralWidget_.get() != NULL)
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45 {
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46 centralWidget_->Unregister(*this);
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47 }
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48 }
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49
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50
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51 WidgetViewport::WidgetViewport() :
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52 statusBar_(NULL),
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53 isMouseOver_(false),
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54 lastMouseX_(0),
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55 lastMouseY_(0),
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56 backgroundChanged_(false),
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57 started_(false)
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58 {
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59 }
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60
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61
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62 void WidgetViewport::SetStatusBar(IStatusBar& statusBar)
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63 {
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64 boost::mutex::scoped_lock lock(mutex_);
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65
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66 statusBar_ = &statusBar;
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67
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68 if (centralWidget_.get() != NULL)
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69 {
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70 centralWidget_->SetStatusBar(statusBar);
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71 }
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72 }
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73
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74
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75 void WidgetViewport::ResetStatusBar()
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76 {
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77 boost::mutex::scoped_lock lock(mutex_);
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78
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79 statusBar_ = NULL;
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80
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81 if (centralWidget_.get() != NULL)
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82 {
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83 centralWidget_->ResetStatusBar();
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84 }
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85 }
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86
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87
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88 IWidget& WidgetViewport::SetCentralWidget(IWidget* widget)
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89 {
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90 if (started_)
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91 {
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92 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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93 }
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94
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95 boost::mutex::scoped_lock lock(mutex_);
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96
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97 if (widget == NULL)
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98 {
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99 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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100 }
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101
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102 UnregisterCentralWidget();
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103
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104 centralWidget_.reset(widget);
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105 centralWidget_->Register(*this);
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106
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107 if (statusBar_ == NULL)
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108 {
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109 centralWidget_->ResetStatusBar();
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110 }
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111 else
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112 {
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113 centralWidget_->SetStatusBar(*statusBar_);
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114 }
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115
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116 backgroundChanged_ = true;
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117
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118 return *widget;
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119 }
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120
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121
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122 void WidgetViewport::NotifyChange(const IWidget& widget)
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123 {
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124 backgroundChanged_ = true;
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125 observers_.NotifyChange(this);
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126 }
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127
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128
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129 void WidgetViewport::Start()
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130 {
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131 boost::mutex::scoped_lock lock(mutex_);
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132
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133 if (centralWidget_.get() != NULL)
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134 {
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135 centralWidget_->Start();
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136 }
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137
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138 started_ = true;
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139 }
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140
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141
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142 void WidgetViewport::Stop()
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143 {
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144 boost::mutex::scoped_lock lock(mutex_);
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145
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146 started_ = false;
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147
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148 if (centralWidget_.get() != NULL)
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149 {
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150 centralWidget_->Stop();
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151 }
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152 }
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153
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154
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155 void WidgetViewport::SetSize(unsigned int width,
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156 unsigned int height)
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157 {
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158 boost::mutex::scoped_lock lock(mutex_);
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159
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160 background_.SetSize(width, height);
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161
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162 if (centralWidget_.get() != NULL)
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163 {
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164 centralWidget_->SetSize(width, height);
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165 }
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166
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167 observers_.NotifyChange(this);
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168 }
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169
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170
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171 bool WidgetViewport::Render(Orthanc::ImageAccessor& surface)
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172 {
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173 boost::mutex::scoped_lock lock(mutex_);
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174
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175 if (!started_ ||
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176 centralWidget_.get() == NULL)
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177 {
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178 return false;
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179 }
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180
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181 if (backgroundChanged_)
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182 {
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183 Orthanc::ImageAccessor accessor = background_.GetAccessor();
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184 if (!centralWidget_->Render(accessor))
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185 {
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186 return false;
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187 }
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188 }
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189
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190 Orthanc::ImageProcessing::Copy(surface, background_.GetAccessor());
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191
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192 if (mouseTracker_.get() != NULL)
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193 {
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194 mouseTracker_->Render(surface);
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195 }
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196 else if (isMouseOver_)
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197 {
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198 centralWidget_->RenderMouseOver(surface, lastMouseX_, lastMouseY_);
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199 }
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200
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201 return true;
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202 }
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203
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204
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205 void WidgetViewport::MouseDown(MouseButton button,
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206 int x,
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207 int y,
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208 KeyboardModifiers modifiers)
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209 {
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210 boost::mutex::scoped_lock lock(mutex_);
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211
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212 if (!started_)
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213 {
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214 return;
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215 }
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216
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217 lastMouseX_ = x;
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218 lastMouseY_ = y;
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219
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220 if (centralWidget_.get() != NULL)
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221 {
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222 mouseTracker_.reset(centralWidget_->CreateMouseTracker(button, x, y, modifiers));
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223 }
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224 else
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225 {
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226 mouseTracker_.reset(NULL);
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227 }
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228
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229 observers_.NotifyChange(this);;
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230 }
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231
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232
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233 void WidgetViewport::MouseUp()
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234 {
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235 boost::mutex::scoped_lock lock(mutex_);
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236
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237 if (!started_)
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238 {
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239 return;
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240 }
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241
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242 if (mouseTracker_.get() != NULL)
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243 {
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244 mouseTracker_->MouseUp();
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245 mouseTracker_.reset(NULL);
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246 observers_.NotifyChange(this);;
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247 }
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248 }
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249
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250
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251 void WidgetViewport::MouseMove(int x,
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252 int y)
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253 {
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254 boost::mutex::scoped_lock lock(mutex_);
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255
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256 if (!started_)
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257 {
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258 return;
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259 }
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260
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261 lastMouseX_ = x;
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262 lastMouseY_ = y;
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263
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264 if (mouseTracker_.get() != NULL)
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265 {
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266 mouseTracker_->MouseMove(x, y);
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267 }
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268
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269 // The scene must be repainted
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270 observers_.NotifyChange(this);
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271 }
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272
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273
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274 void WidgetViewport::MouseEnter()
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275 {
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276 boost::mutex::scoped_lock lock(mutex_);
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277 isMouseOver_ = true;
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278 observers_.NotifyChange(this);
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279 }
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280
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281
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282 void WidgetViewport::MouseLeave()
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283 {
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284 boost::mutex::scoped_lock lock(mutex_);
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285 isMouseOver_ = false;
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286 observers_.NotifyChange(this);
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287 }
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288
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289
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290 void WidgetViewport::MouseWheel(MouseWheelDirection direction,
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291 int x,
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292 int y,
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293 KeyboardModifiers modifiers)
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294 {
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295 boost::mutex::scoped_lock lock(mutex_);
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296
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297 if (!started_)
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298 {
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299 return;
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300 }
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301
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302 if (centralWidget_.get() != NULL &&
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303 mouseTracker_.get() == NULL)
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304 {
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305 centralWidget_->MouseWheel(direction, x, y, modifiers);
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306 }
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307 }
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308
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309
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310 void WidgetViewport::KeyPressed(char key,
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311 KeyboardModifiers modifiers)
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312 {
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313 boost::mutex::scoped_lock lock(mutex_);
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314
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315 if (centralWidget_.get() != NULL &&
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316 mouseTracker_.get() == NULL)
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317 {
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318 centralWidget_->KeyPressed(key, modifiers);
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319 }
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320 }
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321 }
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