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annotate OrthancStone/Sources/Scene2DViewport/ViewportController.h @ 1575:e4a52cbbdd70

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working on print
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 23 Sep 2020 17:25:25 +0200
parents 85e117739eca
children 4fb8fdf03314
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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 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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28 #include "../Viewport/IViewportInteractor.h"
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29
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30 #include <Compatibility.h>
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32 #include <boost/enable_shared_from_this.hpp>
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33 #include <stack>
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34
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35 namespace OrthancStone
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36 {
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37 class UndoStack;
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38
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39 const double ARC_RADIUS_CANVAS_COORD = 30.0;
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40 const double TEXT_CENTER_DISTANCE_CANVAS_COORD = 90;
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41
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42 const double HANDLE_SIDE_LENGTH_CANVAS_COORD = 10.0;
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43 const double HIT_TEST_MAX_DISTANCE_CANVAS_COORD = 15.0;
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45 const uint8_t TEXT_COLOR_RED = 0;
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46 const uint8_t TEXT_COLOR_GREEN = 223;
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47 const uint8_t TEXT_COLOR_BLUE = 81;
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48
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49 const uint8_t TOOL_ANGLE_LINES_COLOR_RED = 0;
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50 const uint8_t TOOL_ANGLE_LINES_COLOR_GREEN = 183;
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51 const uint8_t TOOL_ANGLE_LINES_COLOR_BLUE = 17;
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52
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53 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_RED = 0;
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54 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_GREEN = 17;
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55 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_BLUE = 183;
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56
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57 const uint8_t TOOL_LINES_COLOR_RED = 0;
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58 const uint8_t TOOL_LINES_COLOR_GREEN = 223;
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59 const uint8_t TOOL_LINES_COLOR_BLUE = 21;
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60
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61 const uint8_t TOOL_LINES_HL_COLOR_RED = 0;
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62 const uint8_t TOOL_LINES_HL_COLOR_GREEN = 21;
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63 const uint8_t TOOL_LINES_HL_COLOR_BLUE = 223;
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65 const uint8_t TEXT_OUTLINE_COLOR_RED = 0;
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66 const uint8_t TEXT_OUTLINE_COLOR_GREEN = 56;
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67 const uint8_t TEXT_OUTLINE_COLOR_BLUE = 21;
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68
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69 /**
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70 This object is responsible for hosting a scene, responding to messages from
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71 the model and updating the scene accordingly.
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72
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73 It contains the list of active measuring tools as well as the stack
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74 where measuring tool commands are stored.
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75
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76 The active tracker is also stored in the viewport controller.
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77
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78 Each canvas or other GUI area where we want to display a 2D image, either
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79 directly or through slicing must be assigned a ViewportController.
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80 */
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81 class ViewportController :
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82 public IObservable,
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83 public boost::enable_shared_from_this<ViewportController>
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84 {
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85 public:
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86 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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87 SceneTransformChanged, \
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88 ViewportController);
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89
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90 explicit ViewportController(boost::shared_ptr<IViewport> viewport);
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92 ~ViewportController();
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93
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94 /**
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95 This method returns the list of measure tools containing the supplied point
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96 (in scene coords). A tracker can then be requested from the chosen
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97 measure tool, if needed
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98 */
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99 std::vector<boost::shared_ptr<MeasureTool> > HitTestMeasureTools(
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100 ScenePoint2D p);
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101
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102 /**
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103 This function will traverse the measuring tools and will clear their
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104 highlighted state
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105 */
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106 void ResetMeasuringToolsHighlight();
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107
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108 /**
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109 With this method, the object takes ownership of the supplied tracker and
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110 updates it according to user interaction
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111 */
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112 void AcquireActiveTracker(IFlexiblePointerTracker* tracker);
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113
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114 /** Forwarded to the underlying scene */
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115 AffineTransform2D GetCanvasToSceneTransform() const;
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117 /** Forwarded to the underlying scene */
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118 AffineTransform2D GetSceneToCanvasTransform() const;
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119
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120 /** Forwarded to the underlying scene, and broadcasted to the observers */
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121 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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122
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123 /** Forwarded to the underlying scene, and broadcasted to the observers */
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124 void FitContent(unsigned int viewportWidth,
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125 unsigned int viewportHeight);
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126
722
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127 /** Adds a new measure tool */
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128 void AddMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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129
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130 /** Removes a measure tool or throws if it cannot be found */
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131 void RemoveMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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132
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133 /**
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134 The square handle side length in *scene* coordinates
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135 */
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136 double GetHandleSideLengthS() const;
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137
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138 /**
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139 The angle measure too arc radius in *scene* coordinates
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140
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141 Note: you might wonder why this is not part of the AngleMeasureTool itself,
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142 but we prefer to put all such constants in the same location, to ease
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143 */
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144 double GetAngleToolArcRadiusS() const;
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145
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146 /**
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147 The hit test maximum distance in *scene* coordinates.
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148 If a pointer event is less than GetHandleSideLengthS() to a GUI element,
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149 the hit test for this GUI element is seen as true
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150 */
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151 double GetHitTestMaximumDistanceS() const;
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152
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153 /**
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154 Distance between the top of the angle measuring tool and the center of
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155 the label showing the actual measure, in *scene* coordinates
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156 */
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157 double GetAngleTopTextLabelDistanceS() const;
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158
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159
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160 /** forwarded to the UndoStack */
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161 void PushCommand(boost::shared_ptr<MeasureCommand> command);
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162
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163 /** forwarded to the UndoStack */
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164 void Undo();
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165
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166 /** forwarded to the UndoStack */
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167 void Redo();
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168
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169 /** forwarded to the UndoStack */
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170 bool CanUndo() const;
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171
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172 /** forwarded to the UndoStack */
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173 bool CanRedo() const;
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174
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175
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176 // Must be expressed in canvas coordinates
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177 void HandleMousePress(IViewportInteractor& interactor,
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178 const PointerEvent& event,
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179 unsigned int viewportWidth,
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180 unsigned int viewportHeight);
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181
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182 // Must be expressed in canvas coordinates. Returns "true" if the
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183 // state has changed, so that "Invalidate()" can be called.
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184 bool HandleMouseMove(const PointerEvent& event);
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185
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186 // Must be expressed in canvas coordinates
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187 void HandleMouseRelease(const PointerEvent& event);
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188
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189 const Scene2D& GetScene() const
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190 {
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191 return *scene_;
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192 }
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193
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194 Scene2D& GetScene()
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195 {
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196 return *scene_;
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197 }
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198
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199 /**
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200 This method is used in a move pattern: when the ownership of the scene
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201 managed by this viewport controller must be transferred to another
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202 controller.
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203 */
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204 Scene2D* ReleaseScene()
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205 {
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206 return scene_.release();
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207 }
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208
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209 /**
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210 This method is used when one wishes to replace the scene that is currently
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211 managed by the controller. The previous scene is deleted and the controller
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212 now has ownership of the new one.
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213 */
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214 void AcquireScene(Scene2D* scene)
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215 {
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216 scene_.reset(scene);
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217 }
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218
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219 /**
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220 Sets the undo stack that is used by PushCommand, Undo...
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221 */
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222 void SetUndoStack(boost::weak_ptr<UndoStack> undoStackW)
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223 {
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224 undoStackW_ = undoStackW;
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225 }
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226
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227 bool HasActiveTracker() const
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228 {
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229 return activeTracker_.get() != NULL;
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230 }
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231
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232 private:
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233 double GetCanvasToSceneFactor() const;
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234
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235 boost::shared_ptr<IViewport> viewport_;
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236 boost::weak_ptr<UndoStack> undoStackW_; // Global stack, possibly shared by all viewports
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237 std::vector<boost::shared_ptr<MeasureTool> > measureTools_;
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238 boost::shared_ptr<IFlexiblePointerTracker> activeTracker_; // TODO - Couldn't this be a "std::unique_ptr"?
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239
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240 std::unique_ptr<Scene2D> scene_;
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241
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242 // this is cached
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243 double canvasToSceneFactor_;
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244 };
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245 }