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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 #pragma once
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34
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35 #include "WorldSceneWidget.h"
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36
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37 #include "../Layers/ILayerRendererFactory.h"
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38
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39
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40 namespace OrthancStone
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41 {
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42 class LayeredSceneWidget : public WorldSceneWidget
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43 {
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44 public:
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45 // Must be thread-safe
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46 class ISliceObserver : public boost::noncopyable
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47 {
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48 public:
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49 virtual ~ISliceObserver()
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50 {
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51 }
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52
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53 virtual void NotifySliceChange(const LayeredSceneWidget& source,
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54 const SliceGeometry& slice) = 0;
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55 };
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56
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57 private:
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58 struct SliceChangeFunctor;
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59 class Renderers;
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60 class PendingLayers;
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61 class Layer;
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62
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63 typedef ObserversRegistry<LayeredSceneWidget, ISliceObserver> Observers;
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64
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65 std::vector<Layer*> layers_;
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66 std::auto_ptr<Renderers> renderers_;
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67 std::auto_ptr<PendingLayers> pendingLayers_;
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68 std::auto_ptr<Renderers> pendingRenderers_;
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69 boost::mutex sliceMutex_;
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70 SliceGeometry slice_;
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71 Observers observers_;
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72
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73 protected:
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74 virtual bool HasUpdateThread() const
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75 {
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76 return true;
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77 }
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78
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79 virtual void UpdateStep();
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80
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81 virtual bool RenderScene(CairoContext& context,
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82 const ViewportGeometry& view);
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83
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84 public:
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85 LayeredSceneWidget();
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86
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87 virtual ~LayeredSceneWidget();
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88
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89 virtual SliceGeometry GetSlice();
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90
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91 virtual void GetSceneExtent(double& x1,
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92 double& y1,
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93 double& x2,
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94 double& y2);
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95
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96 ILayerRendererFactory& AddLayer(size_t& layerIndex,
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97 ILayerRendererFactory* factory); // Takes ownership
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98
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99 // Simpler version for basic use cases
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100 void AddLayer(ILayerRendererFactory* factory); // Takes ownership
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101
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102 size_t GetLayerCount() const
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103 {
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104 return layers_.size();
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105 }
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106
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107 RenderStyle GetLayerStyle(size_t layer);
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108
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109 void SetLayerStyle(size_t layer,
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110 const RenderStyle& style);
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111
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112 void SetSlice(const SliceGeometry& slice);
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113
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114 void InvalidateLayer(unsigned int layer);
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115
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116 void InvalidateAllLayers();
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117
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118 virtual void Start();
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119
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120 virtual void Stop();
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121
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122 using WorldSceneWidget::Register;
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123 using WorldSceneWidget::Unregister;
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124
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125 void Register(ISliceObserver& observer)
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126 {
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127 observers_.Register(observer);
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128 }
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129
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130 void Unregister(ISliceObserver& observer)
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131 {
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132 observers_.Unregister(observer);
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133 }
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134 };
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135 }
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