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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 "CairoWidget.h"
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36 #include "IWorldSceneInteractor.h"
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37
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38 #include "../Toolbox/SharedValue.h"
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39 #include "../Toolbox/ViewportGeometry.h"
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40
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41 namespace OrthancStone
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42 {
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43 class WorldSceneWidget : public CairoWidget
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44 {
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45 public:
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46 // Must be thread-safe
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47 class IWorldObserver : public boost::noncopyable
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48 {
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49 public:
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50 virtual ~IWorldObserver()
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51 {
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52 }
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53
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54 virtual void NotifySizeChange(const WorldSceneWidget& source,
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55 ViewportGeometry& view) = 0; // Can be tuned by the observer
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56
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57 virtual void NotifyViewChange(const WorldSceneWidget& source,
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58 const ViewportGeometry& view) = 0;
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59 };
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60
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61 private:
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62 struct ViewChangeFunctor;
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63 struct SizeChangeFunctor;
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64
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65 class SceneMouseTracker;
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66 class PanMouseTracker;
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67 class ZoomMouseTracker;
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68
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69 typedef ObserversRegistry<WorldSceneWidget, IWorldObserver> Observers;
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70
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71 SharedValue<ViewportGeometry> view_;
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72 Observers observers_;
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73 IWorldSceneInteractor* interactor_;
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74
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75
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76 protected:
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77 virtual bool RenderScene(CairoContext& context,
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78 const ViewportGeometry& view) = 0;
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79
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80 virtual bool HasUpdateThread() const
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81 {
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82 return false;
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83 }
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84
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85 virtual void UpdateStep();
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86
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87 virtual bool RenderCairo(CairoContext& context);
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88
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89 virtual void RenderMouseOverCairo(CairoContext& context,
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90 int x,
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91 int y);
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92
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93 void SetSceneExtent(SharedValue<ViewportGeometry>::Locker& locker);
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94
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95 public:
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96 WorldSceneWidget() :
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97 interactor_(NULL)
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98 {
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99 }
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100
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101 using WidgetBase::Register;
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102 using WidgetBase::Unregister;
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103
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104 void Register(IWorldObserver& observer)
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105 {
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106 observers_.Register(observer);
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107 }
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108
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109 void Unregister(IWorldObserver& observer)
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110 {
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111 observers_.Unregister(observer);
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112 }
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113
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114 virtual SliceGeometry GetSlice() = 0;
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115
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116 virtual void GetSceneExtent(double& x1,
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117 double& y1,
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118 double& x2,
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119 double& y2) = 0;
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120
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121 virtual void SetSize(unsigned int width,
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122 unsigned int height);
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123
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124 void SetInteractor(IWorldSceneInteractor& interactor);
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125
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126 virtual void Start();
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127
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128 void SetDefaultView();
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129
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130 void SetView(const ViewportGeometry& view);
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131
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132 ViewportGeometry GetView();
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133
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134 virtual IMouseTracker* CreateMouseTracker(MouseButton button,
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135 int x,
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136 int y,
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137 KeyboardModifiers modifiers);
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138
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139 virtual void RenderSceneMouseOver(CairoContext& context,
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140 const ViewportGeometry& view,
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141 double x,
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142 double y);
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143
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144 virtual IWorldSceneMouseTracker* CreateMouseSceneTracker(const ViewportGeometry& view,
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145 MouseButton button,
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146 double x,
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147 double y,
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148 KeyboardModifiers modifiers);
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149
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150 virtual void MouseWheel(MouseWheelDirection direction,
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151 int x,
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152 int y,
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153 KeyboardModifiers modifiers);
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154
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155 virtual void KeyPressed(char key,
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156 KeyboardModifiers modifiers);
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157 };
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158 }
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