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annotate OrthancStone/Sources/Scene2DViewport/ViewportController.h @ 1870:3889ae96d2e9

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added copyright UCLouvain
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 11:04:09 +0100
parents 462d7a0e064e
children 7053b8a0aaec
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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) 2017-2021 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23 #pragma once
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24
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25 #include "PredeclaredTypes.h"
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26
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27 #include "../Messages/IObservable.h"
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28 #include "../Scene2D/Scene2D.h"
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29 #include "../Scene2DViewport/IFlexiblePointerTracker.h"
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30 #include "../Viewport/IViewportInteractor.h"
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31
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32 #include <Compatibility.h>
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33
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34 #include <boost/enable_shared_from_this.hpp>
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35 #include <stack>
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36
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37 namespace OrthancStone
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38 {
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39 class UndoStack;
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40
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41 const double ARC_RADIUS_CANVAS_COORD = 30.0;
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42 const double TEXT_CENTER_DISTANCE_CANVAS_COORD = 90;
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43
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44 const double HANDLE_SIDE_LENGTH_CANVAS_COORD = 10.0;
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45 const double HIT_TEST_MAX_DISTANCE_CANVAS_COORD = 15.0;
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47 const uint8_t TEXT_COLOR_RED = 0;
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48 const uint8_t TEXT_COLOR_GREEN = 223;
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49 const uint8_t TEXT_COLOR_BLUE = 81;
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50
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51 const uint8_t TOOL_ANGLE_LINES_COLOR_RED = 0;
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52 const uint8_t TOOL_ANGLE_LINES_COLOR_GREEN = 183;
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53 const uint8_t TOOL_ANGLE_LINES_COLOR_BLUE = 17;
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54
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55 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_RED = 0;
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56 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_GREEN = 17;
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57 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_BLUE = 183;
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58
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59 const uint8_t TOOL_LINES_COLOR_RED = 0;
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60 const uint8_t TOOL_LINES_COLOR_GREEN = 223;
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61 const uint8_t TOOL_LINES_COLOR_BLUE = 21;
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62
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63 const uint8_t TOOL_LINES_HL_COLOR_RED = 0;
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64 const uint8_t TOOL_LINES_HL_COLOR_GREEN = 21;
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65 const uint8_t TOOL_LINES_HL_COLOR_BLUE = 223;
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66
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67 const uint8_t TEXT_OUTLINE_COLOR_RED = 0;
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68 const uint8_t TEXT_OUTLINE_COLOR_GREEN = 56;
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69 const uint8_t TEXT_OUTLINE_COLOR_BLUE = 21;
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70
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71 /**
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72 This object is responsible for hosting a scene, responding to messages from
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73 the model and updating the scene accordingly.
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74
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75 It contains the list of active measuring tools as well as the stack
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76 where measuring tool commands are stored.
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77
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78 The active tracker is also stored in the viewport controller.
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79
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80 Each canvas or other GUI area where we want to display a 2D image, either
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81 directly or through slicing must be assigned a ViewportController.
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82 */
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83 class ViewportController :
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84 public IObservable,
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85 public boost::enable_shared_from_this<ViewportController>
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86 {
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87 public:
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88 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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89 SceneTransformChanged, \
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90 ViewportController);
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91
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92 class GrayscaleWindowingChanged : public OriginMessage<ViewportController>
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93 {
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94 ORTHANC_STONE_MESSAGE(__FILE__, __LINE__);
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95
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96 private:
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97 double windowingCenter_;
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98 double windowingWidth_;
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99
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100 public:
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101 GrayscaleWindowingChanged(const ViewportController& origin,
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102 double windowingCenter,
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103 double windowingWidth) :
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104 OriginMessage(origin),
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105 windowingCenter_(windowingCenter),
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106 windowingWidth_(windowingWidth)
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107 {
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108 }
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109
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110 double GetWindowingCenter() const
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111 {
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112 return windowingCenter_;
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113 }
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114
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115 double GetWindowingWidth() const
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116 {
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117 return windowingWidth_;
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118 }
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119 };
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120
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121 explicit ViewportController(boost::weak_ptr<IViewport> viewport);
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122
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123 ~ViewportController();
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124
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125 /**
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126 This method returns the list of measure tools containing the supplied point
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127 (in scene coords). A tracker can then be requested from the chosen
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128 measure tool, if needed
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129 */
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130 std::vector<boost::shared_ptr<MeasureTool> > HitTestMeasureTools(
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131 ScenePoint2D p);
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132
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133 /**
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134 This function will traverse the measuring tools and will clear their
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135 highlighted state
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136 */
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137 void ResetMeasuringToolsHighlight();
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138
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139 /**
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140 With this method, the object takes ownership of the supplied tracker and
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141 updates it according to user interaction
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142 */
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143 void AcquireActiveTracker(const boost::shared_ptr<IFlexiblePointerTracker>& tracker)
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144 {
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145 activeTracker_ = tracker;
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146 }
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147
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148 /** Forwarded to the underlying scene */
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149 AffineTransform2D GetCanvasToSceneTransform() const;
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150
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151 /** Forwarded to the underlying scene */
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152 AffineTransform2D GetSceneToCanvasTransform() const;
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153
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154 /** Forwarded to the underlying scene, and broadcasted to the observers */
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155 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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156
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157 /** Info broadcasted to the observers */
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158 void BroadcastGrayscaleWindowingChanged(double windowingCenter,
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159 double windowingWidth);
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160
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161 /** Forwarded to the underlying scene, and broadcasted to the observers */
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162 void FitContent(unsigned int viewportWidth,
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163 unsigned int viewportHeight);
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164
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165 /** Adds a new measure tool */
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166 void AddMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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167
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168 /** Removes a measure tool or throws if it cannot be found */
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169 void RemoveMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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170
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171 /**
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172 The square handle side length in *scene* coordinates
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173 */
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174 double GetHandleSideLengthS() const;
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175
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176 /**
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177 The angle measure too arc radius in *scene* coordinates
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178
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179 Note: you might wonder why this is not part of the AngleMeasureTool itself,
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180 but we prefer to put all such constants in the same location, to ease
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181 */
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182 double GetAngleToolArcRadiusS() const;
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183
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184 /**
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185 The hit test maximum distance in *scene* coordinates.
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186 If a pointer event is less than GetHandleSideLengthS() to a GUI element,
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187 the hit test for this GUI element is seen as true
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188 */
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189 double GetHitTestMaximumDistanceS() const;
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190
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191 /**
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192 Distance between the top of the angle measuring tool and the center of
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193 the label showing the actual measure, in *scene* coordinates
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194 */
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195 double GetAngleTopTextLabelDistanceS() const;
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196
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197
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198 /** forwarded to the UndoStack */
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199 void PushCommand(boost::shared_ptr<MeasureCommand> command);
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200
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201 /** forwarded to the UndoStack */
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202 void Undo();
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203
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204 /** forwarded to the UndoStack */
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205 void Redo();
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206
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207 /** forwarded to the UndoStack */
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208 bool CanUndo() const;
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209
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210 /** forwarded to the UndoStack */
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211 bool CanRedo() const;
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212
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213
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214 // Must be expressed in canvas coordinates
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215 void HandleMousePress(IViewportInteractor& interactor,
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216 const PointerEvent& event,
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217 unsigned int viewportWidth,
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218 unsigned int viewportHeight);
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219
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220 // Must be expressed in canvas coordinates. Returns "true" if the
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221 // state has changed, so that "Invalidate()" can be called.
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222 bool HandleMouseMove(const PointerEvent& event);
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223
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224 // Must be expressed in canvas coordinates
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225 void HandleMouseRelease(const PointerEvent& event);
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226
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227 const Scene2D& GetScene() const
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228 {
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229 return *scene_;
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230 }
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231
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232 Scene2D& GetScene()
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233 {
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234 return *scene_;
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235 }
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236
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237 /**
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238 This method is used in a move pattern: when the ownership of the scene
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239 managed by this viewport controller must be transferred to another
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240 controller.
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241 */
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242 Scene2D* ReleaseScene()
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243 {
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244 return scene_.release();
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245 }
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246
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247 /**
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248 This method is used when one wishes to replace the scene that is currently
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249 managed by the controller. The previous scene is deleted and the controller
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250 now has ownership of the new one.
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251 */
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252 void AcquireScene(Scene2D* scene)
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253 {
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254 scene_.reset(scene);
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255 }
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256
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257 /**
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258 Sets the undo stack that is used by PushCommand, Undo...
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259 */
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260 void SetUndoStack(boost::weak_ptr<UndoStack> undoStackW)
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261 {
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262 undoStackW_ = undoStackW;
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263 }
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264
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265 bool HasActiveTracker() const
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266 {
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267 return activeTracker_.get() != NULL;
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268 }
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269
698
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270 private:
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271 double GetCanvasToSceneFactor() const;
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272
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273 // The scene can be used by the higher-level objects (including the
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274 // measuring tools), possibly in their destructor, and so it must be
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275 // deleted last (and, thus, constructed first)
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276 std::unique_ptr<Scene2D> scene_;
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277
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278 boost::weak_ptr<IViewport> viewport_;
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279
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280 boost::weak_ptr<UndoStack> undoStackW_; // Global stack, possibly shared by all viewports
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281 std::vector<boost::shared_ptr<MeasureTool> > measureTools_;
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282 boost::shared_ptr<IFlexiblePointerTracker> activeTracker_; // TODO - Couldn't this be a "std::unique_ptr"?
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283
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284
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285 // this is cached
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286 double canvasToSceneFactor_;
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287 };
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288 }