Mercurial > hg > orthanc-stone

annotate Framework/Scene2DViewport/ViewportController.h @ 916:a911f5bb48da am-dev

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MultiPlatform Basic Scene sample (so far: SDL + Qt)
author Alain Mazy <alain@mazy.be>
date Fri, 19 Jul 2019 15:06:36 +0200
parents 0c5201499af8
children 685c9a2d115f
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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 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21 #pragma once
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22
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23 #include "PredeclaredTypes.h"
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24
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25 #include "../Viewport/IViewport.h"
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26 #include "../Scene2D/PointerEvent.h"
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27 #include "../Scene2DViewport/IFlexiblePointerTracker.h"
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28
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29 #include <stack>
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30
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31 namespace OrthancStone
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32 {
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33 class UndoStack;
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34
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35 const double ARC_RADIUS_CANVAS_COORD = 30.0;
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36 const double TEXT_CENTER_DISTANCE_CANVAS_COORD = 90;
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37
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38 const double HANDLE_SIDE_LENGTH_CANVAS_COORD = 10.0;
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39 const double HIT_TEST_MAX_DISTANCE_CANVAS_COORD = 15.0;
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41 const uint8_t TEXT_COLOR_RED = 0;
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42 const uint8_t TEXT_COLOR_GREEN = 223;
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43 const uint8_t TEXT_COLOR_BLUE = 81;
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44
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45 const uint8_t TOOL_ANGLE_LINES_COLOR_RED = 0;
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46 const uint8_t TOOL_ANGLE_LINES_COLOR_GREEN = 183;
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47 const uint8_t TOOL_ANGLE_LINES_COLOR_BLUE = 17;
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48
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49 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_RED = 0;
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50 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_GREEN = 17;
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51 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_BLUE = 183;
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52
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53 const uint8_t TOOL_LINES_COLOR_RED = 0;
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54 const uint8_t TOOL_LINES_COLOR_GREEN = 223;
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55 const uint8_t TOOL_LINES_COLOR_BLUE = 21;
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56
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57 const uint8_t TOOL_LINES_HL_COLOR_RED = 0;
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58 const uint8_t TOOL_LINES_HL_COLOR_GREEN = 21;
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59 const uint8_t TOOL_LINES_HL_COLOR_BLUE = 223;
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61 const uint8_t TEXT_OUTLINE_COLOR_RED = 0;
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62 const uint8_t TEXT_OUTLINE_COLOR_GREEN = 56;
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63 const uint8_t TEXT_OUTLINE_COLOR_BLUE = 21;
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64
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65 /**
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66 This object is responsible for hosting a scene, responding to messages from
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67 the model and updating the scene accordingly.
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68
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69 It contains the list of active measuring tools as well as the stack
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70 where measuring tool commands are stored.
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71
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72 The active tracker is also stored in the viewport controller.
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73
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74 Each canvas or other GUI area where we want to display a 2D image, either
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75 directly or through slicing must be assigned a ViewportController.
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76 */
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77 class ViewportController : public IObservable
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78 {
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79 public:
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80 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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81 SceneTransformChanged, ViewportController);
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82
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83 ViewportController(boost::weak_ptr<UndoStack> undoStackW,
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84 MessageBroker& broker,
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85 IViewport& viewport);
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86
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87 /**
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88 This method is called by the GUI system and should update/delete the
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89 current tracker
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90 */
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91 bool HandlePointerEvent(PointerEvent e);
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92
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93 /**
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94 This method returns the list of measure tools containing the supplied point
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95 (in scene coords). A tracker can then be requested from the chosen
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96 measure tool, if needed
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97 */
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98 std::vector<boost::shared_ptr<MeasureTool> > HitTestMeasureTools(ScenePoint2D p);
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99
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100 /**
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101 This function will traverse the measuring tools and will clear their
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102 highlighted state
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103 */
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104 void ResetMeasuringToolsHighlight();
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105
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106 /**
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107 With this method, the object takes ownership of the supplied tracker and
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108 updates it according to user interaction
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109 */
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110 void SetActiveTracker(boost::shared_ptr<IFlexiblePointerTracker> tracker);
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111
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112 /** Forwarded to the underlying scene */
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113 const AffineTransform2D& GetCanvasToSceneTransform() const;
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114
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115 /** Forwarded to the underlying scene */
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116 const AffineTransform2D& GetSceneToCanvasTransform() const;
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117
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118 /** Forwarded to the underlying scene, and broadcasted to the observers */
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119 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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120
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121 /** Forwarded to the underlying scene, and broadcasted to the observers */
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122 void FitContent(unsigned int canvasWidth, unsigned int canvasHeight);
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123 void FitContent();
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124
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125 /** Adds a new measure tool */
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126 void AddMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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127
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128 /** Removes a measure tool or throws if it cannot be found */
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129 void RemoveMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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130
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131 /**
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132 The square handle side length in *scene* coordinates
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133 */
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134 double GetHandleSideLengthS() const;
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135
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136 /**
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137 The angle measure too arc radius in *scene* coordinates
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138
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139 Note: you might wonder why this is not part of the AngleMeasureTool itself,
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140 but we prefer to put all such constants in the same location, to ease
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141 */
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142 double GetAngleToolArcRadiusS() const;
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143
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144 /**
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145 The hit test maximum distance in *scene* coordinates.
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146 If a pointer event is less than GetHandleSideLengthS() to a GUI element,
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147 the hit test for this GUI element is seen as true
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148 */
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149 double GetHitTestMaximumDistanceS() const;
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150
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151 /**
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152 Distance between the top of the angle measuring tool and the center of
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153 the label showing the actual measure, in *scene* coordinates
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154 */
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155 double GetAngleTopTextLabelDistanceS() const;
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156
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157
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158 /** forwarded to the UndoStack */
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159 void PushCommand(boost::shared_ptr<TrackerCommand> command);
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160
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161 /** forwarded to the UndoStack */
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162 void Undo();
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163
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164 /** forwarded to the UndoStack */
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165 void Redo();
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166
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167 /** forwarded to the UndoStack */
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168 bool CanUndo() const;
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169
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170 /** forwarded to the UndoStack */
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171 bool CanRedo() const;
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172
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173 IViewport& GetViewport()
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174 {
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175 return viewport_;
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176 }
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177
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178 Scene2D& GetScene()
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179 {
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180 return viewport_.GetScene();
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181 }
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182
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183 const Scene2D& GetScene() const
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184 {
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185 return const_cast<IViewport&>(viewport_).GetScene();
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186 }
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187
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188 private:
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189 double GetCanvasToSceneFactor() const;
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190
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191 boost::weak_ptr<UndoStack> undoStackW_;
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192
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193 boost::shared_ptr<UndoStack> GetUndoStack();
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194 boost::shared_ptr<const UndoStack> GetUndoStack() const;
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195
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196 std::vector<boost::shared_ptr<MeasureTool> > measureTools_;
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197 boost::shared_ptr<IFlexiblePointerTracker> tracker_;
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198
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199 // this is cached
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200 mutable double canvasToSceneFactor_;
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201
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202 // Refactoring on 2019-07-10: Removing shared_ptr from scene
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203 IViewport& viewport_;
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204 };
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205 }