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annotate Framework/Scene2DViewport/ViewportController.h @ 1236:358461330978 broker

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global function GetWebGLViewportsRegistry()
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 09 Dec 2019 20:45:47 +0100
parents a28861abf888
children 964c89e15e7e
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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 "../Messages/IObservable.h"
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26 #include "../Scene2D/Scene2D.h"
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27 #include "../Scene2DViewport/IFlexiblePointerTracker.h"
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29 #include <boost/enable_shared_from_this.hpp>
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30 #include <stack>
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31
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32 namespace OrthancStone
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33 {
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34 // TODO - Move this to another file
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35 class IViewportInteractor : public boost::noncopyable
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36 {
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37 public:
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38 virtual ~IViewportInteractor()
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39 {
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40 }
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41
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42 virtual IFlexiblePointerTracker* CreateTracker(boost::shared_ptr<ViewportController> controller,
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43 const PointerEvent& event,
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44 unsigned int viewportWidth,
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45 unsigned int viewportHeight) = 0;
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46 };
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47
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48
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49 // TODO - Move this to another file
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50 class DefaultViewportInteractor : public IViewportInteractor
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51 {
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52 public:
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53 virtual IFlexiblePointerTracker* CreateTracker(boost::shared_ptr<ViewportController> controller,
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54 const PointerEvent& event,
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55 unsigned int viewportWidth,
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56 unsigned int viewportHeight) ORTHANC_OVERRIDE;
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57 };
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58
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59
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60 class UndoStack;
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61
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62 const double ARC_RADIUS_CANVAS_COORD = 30.0;
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63 const double TEXT_CENTER_DISTANCE_CANVAS_COORD = 90;
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64
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65 const double HANDLE_SIDE_LENGTH_CANVAS_COORD = 10.0;
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66 const double HIT_TEST_MAX_DISTANCE_CANVAS_COORD = 15.0;
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67
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68 const uint8_t TEXT_COLOR_RED = 0;
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69 const uint8_t TEXT_COLOR_GREEN = 223;
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70 const uint8_t TEXT_COLOR_BLUE = 81;
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71
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72 const uint8_t TOOL_ANGLE_LINES_COLOR_RED = 0;
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73 const uint8_t TOOL_ANGLE_LINES_COLOR_GREEN = 183;
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74 const uint8_t TOOL_ANGLE_LINES_COLOR_BLUE = 17;
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75
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76 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_RED = 0;
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77 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_GREEN = 17;
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78 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_BLUE = 183;
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79
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80 const uint8_t TOOL_LINES_COLOR_RED = 0;
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81 const uint8_t TOOL_LINES_COLOR_GREEN = 223;
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82 const uint8_t TOOL_LINES_COLOR_BLUE = 21;
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83
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84 const uint8_t TOOL_LINES_HL_COLOR_RED = 0;
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85 const uint8_t TOOL_LINES_HL_COLOR_GREEN = 21;
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86 const uint8_t TOOL_LINES_HL_COLOR_BLUE = 223;
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87
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88 const uint8_t TEXT_OUTLINE_COLOR_RED = 0;
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89 const uint8_t TEXT_OUTLINE_COLOR_GREEN = 56;
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90 const uint8_t TEXT_OUTLINE_COLOR_BLUE = 21;
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91
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92 /**
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93 This object is responsible for hosting a scene, responding to messages from
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94 the model and updating the scene accordingly.
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95
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96 It contains the list of active measuring tools as well as the stack
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97 where measuring tool commands are stored.
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98
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99 The active tracker is also stored in the viewport controller.
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100
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101 Each canvas or other GUI area where we want to display a 2D image, either
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102 directly or through slicing must be assigned a ViewportController.
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103 */
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104 class ViewportController :
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105 public IObservable,
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106 public boost::enable_shared_from_this<ViewportController>
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107 {
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108 public:
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109 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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110 SceneTransformChanged, ViewportController);
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111
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112 ViewportController();
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113
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114 ViewportController(const Scene2D& scene /* will be cloned */);
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115
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116 ViewportController(boost::weak_ptr<UndoStack> undoStackW);
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118 ~ViewportController();
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119
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120 /**
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121 This method returns the list of measure tools containing the supplied point
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122 (in scene coords). A tracker can then be requested from the chosen
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123 measure tool, if needed
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124 */
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125 std::vector<boost::shared_ptr<MeasureTool> > HitTestMeasureTools(ScenePoint2D p);
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126
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127 /**
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128 This function will traverse the measuring tools and will clear their
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129 highlighted state
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130 */
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131 void ResetMeasuringToolsHighlight();
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132
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133 /**
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134 With this method, the object takes ownership of the supplied tracker and
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135 updates it according to user interaction
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136 */
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137 void AcquireActiveTracker(IFlexiblePointerTracker* tracker);
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138
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139 /** Forwarded to the underlying scene */
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140 AffineTransform2D GetCanvasToSceneTransform() const;
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141
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142 /** Forwarded to the underlying scene */
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143 AffineTransform2D GetSceneToCanvasTransform() const;
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144
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145 /** Forwarded to the underlying scene, and broadcasted to the observers */
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146 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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147
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148 /** Forwarded to the underlying scene, and broadcasted to the observers */
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149 void FitContent(unsigned int viewportWidth,
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150 unsigned int viewportHeight);
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151
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152 /** Adds a new measure tool */
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153 void AddMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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154
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155 /** Removes a measure tool or throws if it cannot be found */
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156 void RemoveMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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157
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158 /**
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159 The square handle side length in *scene* coordinates
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160 */
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161 double GetHandleSideLengthS() const;
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162
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163 /**
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164 The angle measure too arc radius in *scene* coordinates
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165
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166 Note: you might wonder why this is not part of the AngleMeasureTool itself,
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167 but we prefer to put all such constants in the same location, to ease
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168 */
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169 double GetAngleToolArcRadiusS() const;
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170
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171 /**
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172 The hit test maximum distance in *scene* coordinates.
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173 If a pointer event is less than GetHandleSideLengthS() to a GUI element,
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174 the hit test for this GUI element is seen as true
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175 */
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176 double GetHitTestMaximumDistanceS() const;
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177
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178 /**
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179 Distance between the top of the angle measuring tool and the center of
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180 the label showing the actual measure, in *scene* coordinates
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181 */
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182 double GetAngleTopTextLabelDistanceS() const;
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183
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184
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185 /** forwarded to the UndoStack */
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186 void PushCommand(boost::shared_ptr<MeasureCommand> command);
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187
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188 /** forwarded to the UndoStack */
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189 void Undo();
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190
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191 /** forwarded to the UndoStack */
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192 void Redo();
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193
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194 /** forwarded to the UndoStack */
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195 bool CanUndo() const;
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196
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197 /** forwarded to the UndoStack */
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198 bool CanRedo() const;
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199
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200
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201 // Must be expressed in canvas coordinates
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202 void HandleMousePress(IViewportInteractor& interactor,
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203 const PointerEvent& event,
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204 unsigned int viewportWidth,
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205 unsigned int viewportHeight);
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206
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207 // Must be expressed in canvas coordinates
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208 void HandleMouseMove(const PointerEvent& event);
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209
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210 // Must be expressed in canvas coordinates
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211 void HandleMouseRelease(const PointerEvent& event);
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212
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213 const Scene2D& GetScene() const
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214 {
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215 return *scene_;
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216 }
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217
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218 Scene2D& GetScene()
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219 {
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220 return *scene_;
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221 }
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222
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223 bool HasActiveTracker() const
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224 {
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225 return activeTracker_.get() != NULL;
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226 }
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227
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228 private:
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229 double GetCanvasToSceneFactor() const;
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230
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231 boost::weak_ptr<UndoStack> undoStackW_; // Global stack, possibly shared by all viewports
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232 std::vector<boost::shared_ptr<MeasureTool> > measureTools_;
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233 boost::shared_ptr<IFlexiblePointerTracker> activeTracker_; // TODO - Couldn't this be a "std::auto_ptr"?
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234
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235 std::auto_ptr<Scene2D> scene_;
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236
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237 // this is cached
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238 double canvasToSceneFactor_;
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239 };
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240 }