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annotate OrthancStone/Sources/Scene2DViewport/ViewportController.h @ 1598:8563ea5d8ae4

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relicensing some files, cf. osimis bm26 and chu agreement on 2020-05-20
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 26 Oct 2020 20:49:28 +0100
parents 4fb8fdf03314
children 874e178f34e9
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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) 2017-2020 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 Lesser 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 * Lesser 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 Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22 #pragma once
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23
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24 #include "PredeclaredTypes.h"
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25
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26 #include "../Messages/IObservable.h"
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27 #include "../Scene2D/Scene2D.h"
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28 #include "../Scene2DViewport/IFlexiblePointerTracker.h"
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29 #include "../Viewport/IViewportInteractor.h"
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31 #include <Compatibility.h>
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32
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33 #include <boost/enable_shared_from_this.hpp>
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34 #include <stack>
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35
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36 namespace OrthancStone
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37 {
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38 class UndoStack;
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39
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40 const double ARC_RADIUS_CANVAS_COORD = 30.0;
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41 const double TEXT_CENTER_DISTANCE_CANVAS_COORD = 90;
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42
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43 const double HANDLE_SIDE_LENGTH_CANVAS_COORD = 10.0;
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44 const double HIT_TEST_MAX_DISTANCE_CANVAS_COORD = 15.0;
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46 const uint8_t TEXT_COLOR_RED = 0;
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47 const uint8_t TEXT_COLOR_GREEN = 223;
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48 const uint8_t TEXT_COLOR_BLUE = 81;
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49
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50 const uint8_t TOOL_ANGLE_LINES_COLOR_RED = 0;
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51 const uint8_t TOOL_ANGLE_LINES_COLOR_GREEN = 183;
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52 const uint8_t TOOL_ANGLE_LINES_COLOR_BLUE = 17;
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54 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_RED = 0;
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55 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_GREEN = 17;
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56 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_BLUE = 183;
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57
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58 const uint8_t TOOL_LINES_COLOR_RED = 0;
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59 const uint8_t TOOL_LINES_COLOR_GREEN = 223;
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60 const uint8_t TOOL_LINES_COLOR_BLUE = 21;
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61
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62 const uint8_t TOOL_LINES_HL_COLOR_RED = 0;
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63 const uint8_t TOOL_LINES_HL_COLOR_GREEN = 21;
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64 const uint8_t TOOL_LINES_HL_COLOR_BLUE = 223;
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66 const uint8_t TEXT_OUTLINE_COLOR_RED = 0;
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67 const uint8_t TEXT_OUTLINE_COLOR_GREEN = 56;
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68 const uint8_t TEXT_OUTLINE_COLOR_BLUE = 21;
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69
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70 /**
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71 This object is responsible for hosting a scene, responding to messages from
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72 the model and updating the scene accordingly.
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73
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74 It contains the list of active measuring tools as well as the stack
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75 where measuring tool commands are stored.
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76
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77 The active tracker is also stored in the viewport controller.
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78
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79 Each canvas or other GUI area where we want to display a 2D image, either
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80 directly or through slicing must be assigned a ViewportController.
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81 */
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82 class ViewportController :
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83 public IObservable,
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84 public boost::enable_shared_from_this<ViewportController>
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85 {
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86 public:
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87 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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88 SceneTransformChanged, \
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89 ViewportController);
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90
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91 explicit ViewportController(boost::shared_ptr<IViewport> viewport);
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93 ~ViewportController();
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94
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95 /**
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96 This method returns the list of measure tools containing the supplied point
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97 (in scene coords). A tracker can then be requested from the chosen
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98 measure tool, if needed
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99 */
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100 std::vector<boost::shared_ptr<MeasureTool> > HitTestMeasureTools(
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101 ScenePoint2D p);
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102
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103 /**
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104 This function will traverse the measuring tools and will clear their
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105 highlighted state
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106 */
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107 void ResetMeasuringToolsHighlight();
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108
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109 /**
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110 With this method, the object takes ownership of the supplied tracker and
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111 updates it according to user interaction
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112 */
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113 void AcquireActiveTracker(IFlexiblePointerTracker* tracker);
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114
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115 /** Forwarded to the underlying scene */
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116 AffineTransform2D GetCanvasToSceneTransform() const;
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117
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118 /** Forwarded to the underlying scene */
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119 AffineTransform2D GetSceneToCanvasTransform() const;
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121 /** Forwarded to the underlying scene, and broadcasted to the observers */
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122 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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123
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124 /** Forwarded to the underlying scene, and broadcasted to the observers */
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125 void FitContent(unsigned int viewportWidth,
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126 unsigned int viewportHeight);
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127
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128 /** Adds a new measure tool */
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129 void AddMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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130
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131 /** Removes a measure tool or throws if it cannot be found */
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132 void RemoveMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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133
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134 /**
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135 The square handle side length in *scene* coordinates
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136 */
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137 double GetHandleSideLengthS() const;
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138
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139 /**
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140 The angle measure too arc radius in *scene* coordinates
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141
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142 Note: you might wonder why this is not part of the AngleMeasureTool itself,
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143 but we prefer to put all such constants in the same location, to ease
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144 */
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145 double GetAngleToolArcRadiusS() const;
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146
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147 /**
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148 The hit test maximum distance in *scene* coordinates.
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149 If a pointer event is less than GetHandleSideLengthS() to a GUI element,
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150 the hit test for this GUI element is seen as true
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151 */
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152 double GetHitTestMaximumDistanceS() const;
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153
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154 /**
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155 Distance between the top of the angle measuring tool and the center of
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156 the label showing the actual measure, in *scene* coordinates
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157 */
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158 double GetAngleTopTextLabelDistanceS() const;
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159
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160
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161 /** forwarded to the UndoStack */
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162 void PushCommand(boost::shared_ptr<MeasureCommand> command);
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163
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164 /** forwarded to the UndoStack */
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165 void Undo();
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166
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167 /** forwarded to the UndoStack */
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168 void Redo();
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169
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170 /** forwarded to the UndoStack */
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171 bool CanUndo() const;
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172
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173 /** forwarded to the UndoStack */
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174 bool CanRedo() const;
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175
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176
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177 // Must be expressed in canvas coordinates
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178 void HandleMousePress(IViewportInteractor& interactor,
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179 const PointerEvent& event,
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180 unsigned int viewportWidth,
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181 unsigned int viewportHeight);
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182
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183 // Must be expressed in canvas coordinates. Returns "true" if the
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184 // state has changed, so that "Invalidate()" can be called.
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185 bool HandleMouseMove(const PointerEvent& event);
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186
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187 // Must be expressed in canvas coordinates
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188 void HandleMouseRelease(const PointerEvent& event);
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189
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190 const Scene2D& GetScene() const
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191 {
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192 return *scene_;
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193 }
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194
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195 Scene2D& GetScene()
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196 {
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197 return *scene_;
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198 }
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199
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200 /**
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201 This method is used in a move pattern: when the ownership of the scene
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202 managed by this viewport controller must be transferred to another
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203 controller.
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204 */
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205 Scene2D* ReleaseScene()
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206 {
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207 return scene_.release();
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208 }
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209
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210 /**
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211 This method is used when one wishes to replace the scene that is currently
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212 managed by the controller. The previous scene is deleted and the controller
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213 now has ownership of the new one.
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214 */
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215 void AcquireScene(Scene2D* scene)
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216 {
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217 scene_.reset(scene);
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218 }
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219
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220 /**
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221 Sets the undo stack that is used by PushCommand, Undo...
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222 */
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223 void SetUndoStack(boost::weak_ptr<UndoStack> undoStackW)
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224 {
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225 undoStackW_ = undoStackW;
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226 }
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227
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228 bool HasActiveTracker() const
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229 {
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230 return activeTracker_.get() != NULL;
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231 }
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232
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233 private:
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234 double GetCanvasToSceneFactor() const;
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235
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236 boost::shared_ptr<IViewport> viewport_;
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237 boost::weak_ptr<UndoStack> undoStackW_; // Global stack, possibly shared by all viewports
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238 std::vector<boost::shared_ptr<MeasureTool> > measureTools_;
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239 boost::shared_ptr<IFlexiblePointerTracker> activeTracker_; // TODO - Couldn't this be a "std::unique_ptr"?
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240
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241 std::unique_ptr<Scene2D> scene_;
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242
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243 // this is cached
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244 double canvasToSceneFactor_;
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245 };
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246 }