Mercurial > hg > orthanc-stone

annotate Framework/Scene2DViewport/ViewportController.h @ 842:2b245953b44b

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removed some c++11 for older compilers
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 12 Jun 2019 09:52:25 +0200
parents e42b491f1fb2
children e3c56d4f863f
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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 "../Scene2D/Scene2D.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 /**
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34 These constats are used
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35
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36 */
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37 const double ARC_RADIUS_CANVAS_COORD = 30.0;
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38 const double TEXT_CENTER_DISTANCE_CANVAS_COORD = 90;
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39
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40 const double HANDLE_SIDE_LENGTH_CANVAS_COORD = 10.0;
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41 const double HIT_TEST_MAX_DISTANCE_CANVAS_COORD = 15.0;
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42
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43 const uint8_t TEXT_COLOR_RED = 0;
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44 const uint8_t TEXT_COLOR_GREEN = 223;
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45 const uint8_t TEXT_COLOR_BLUE = 81;
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46
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47 const uint8_t TOOL_LINES_COLOR_RED = 0;
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48 const uint8_t TOOL_LINES_COLOR_GREEN = 223;
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49 const uint8_t TOOL_LINES_COLOR_BLUE = 21;
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50
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51
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52 const uint8_t TEXT_OUTLINE_COLOR_RED = 0;
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53 const uint8_t TEXT_OUTLINE_COLOR_GREEN = 56;
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54 const uint8_t TEXT_OUTLINE_COLOR_BLUE = 21;
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55
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56 /**
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57 This object is responsible for hosting a scene, responding to messages from
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58 the model and updating the scene accordingly.
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59
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60 It contains the list of active measuring tools as well as the stack
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61 where measuring tool commands are stored.
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62
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63 The active tracker is also stored in the viewport controller.
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64
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65 Each canvas or other GUI area where we want to display a 2D image, either
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66 directly or through slicing must be assigned a ViewportController.
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67 */
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68 class ViewportController : public IObservable
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69 {
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70 public:
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71 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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72 SceneTransformChanged, ViewportController);
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73
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74 ViewportController(MessageBroker& broker);
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75
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76 boost::shared_ptr<const Scene2D> GetScene() const;
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77 boost::shared_ptr<Scene2D> GetScene();
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78
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79 /**
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80 This method is called by the GUI system and should update/delete the
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81 current tracker
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82 */
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83 bool HandlePointerEvent(PointerEvent e);
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84
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85 /**
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86 This method returns the list of measure tools containing the supplied point
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87 (in scene coords). A tracker can then be requested from the chosen
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88 measure tool, if needed
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89 */
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90 std::vector<boost::shared_ptr<MeasureTool> > HitTestMeasureTools(ScenePoint2D p);
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91
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92 /**
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93 With this method, the object takes ownership of the supplied tracker and
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94 updates it according to user interaction
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95 */
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96 void SetActiveTracker(boost::shared_ptr<IFlexiblePointerTracker> tracker);
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97
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98 /** Forwarded to the underlying scene */
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99 const AffineTransform2D& GetCanvasToSceneTransform() const;
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100
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101 /** Forwarded to the underlying scene */
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102 const AffineTransform2D& GetSceneToCanvasTransform() const;
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103
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104 /** Forwarded to the underlying scene, and broadcasted to the observers */
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105 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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106
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107 /** Forwarded to the underlying scene, and broadcasted to the observers */
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108 void FitContent(unsigned int canvasWidth, unsigned int canvasHeight);
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109
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110 /**
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111 Stores a command :
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112 - this first trims the undo stack to keep the first numAppliedCommands_
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113 - then it adds the supplied command at the top of the undo stack
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114
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115 In other words, when a new command is pushed, all the undone (and not
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116 redone) commands are removed.
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117 */
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118 void PushCommand(boost::shared_ptr<TrackerCommand> command);
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119
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120 /**
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121 Undoes the command at the top of the undo stack, or throws if there is no
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122 command to undo.
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123 You can check "CanUndo" first to protect against extraneous redo.
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124 */
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125 void Undo();
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126
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127 /**
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128 Redoes the command that is just above the last applied command in the undo
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129 stack or throws if there is no command to redo.
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130 You can check "CanRedo" first to protect against extraneous redo.
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131 */
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132 void Redo();
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133
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134 /** selfexpl */
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135 bool CanUndo() const;
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136
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137 /** selfexpl */
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138 bool CanRedo() const;
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139
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140 /** Adds a new measure tool */
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141 void AddMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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142
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143 /** Removes a measure tool or throws if it cannot be found */
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144 void RemoveMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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145
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146 /**
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147 The square handle side length in *scene* coordinates
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148 */
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149 double GetHandleSideLengthS() const;
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150
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151 /**
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152 The angle measure too arc radius in *scene* coordinates
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153
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154 Note: you might wonder why this is not part of the AngleMeasureTool itself,
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155 but we prefer to put all such constants in the same location, to ease
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156 */
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157 double GetAngleToolArcRadiusS() const;
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158
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159 /**
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160 The hit test maximum distance in *scene* coordinates.
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161 If a pointer event is less than GetHandleSideLengthS() to a GUI element,
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162 the hit test for this GUI element is seen as true
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163 */
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164 double GetHitTestMaximumDistanceS() const;
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165
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166 /**
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167 Distance between the top of the angle measuring tool and the center of
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168 the label showing the actual measure, in *scene* coordinates
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169 */
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170 double GetAngleTopTextLabelDistanceS() const;
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171
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172 private:
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173 double GetCanvasToSceneFactor() const;
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174
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175 std::vector<boost::shared_ptr<TrackerCommand> > commandStack_;
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176
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177 /**
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178 This is always between >= 0 and <= undoStack_.size() and gives the
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179 position where the controller is in the undo stack.
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180 - If numAppliedCommands_ > 0, one can undo
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181 - If numAppliedCommands_ < numAppliedCommands_.size(), one can redo
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182 */
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183 size_t numAppliedCommands_;
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184 std::vector<boost::shared_ptr<MeasureTool> > measureTools_;
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185 boost::shared_ptr<Scene2D> scene_;
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186 boost::shared_ptr<IFlexiblePointerTracker> tracker_;
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187
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188 // this is cached
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189 mutable double canvasToSceneFactor_;
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190 };
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191 }