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annotate Framework/Scene2DViewport/ViewportController.h @ 1208:00e6bff9ea39 broker

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handling of mouse interactions in ViewportController
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 03 Dec 2019 18:51:03 +0100
parents f3bb9a6dd949
children 644baa70373d
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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 "../Viewport/IViewport.h"
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26 #include "../Scene2DViewport/IFlexiblePointerTracker.h"
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28 #include <boost/enable_shared_from_this.hpp>
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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 // TODO - Move this to another file
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34 class IViewportInteractor : public boost::noncopyable
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35 {
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36 public:
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37 virtual ~IViewportInteractor()
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38 {
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39 }
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40
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41 virtual IFlexiblePointerTracker* CreateTracker(boost::shared_ptr<ViewportController> controller,
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42 const PointerEvent& event) = 0;
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43 };
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44
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45
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46 // TODO - Move this to another file
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47 class DefaultViewportInteractor : public IViewportInteractor
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48 {
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49 public:
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50 virtual IFlexiblePointerTracker* CreateTracker(boost::shared_ptr<ViewportController> controller,
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51 const PointerEvent& event) ORTHANC_OVERRIDE;
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52 };
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53
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54
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55 class UndoStack;
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56
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57 const double ARC_RADIUS_CANVAS_COORD = 30.0;
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58 const double TEXT_CENTER_DISTANCE_CANVAS_COORD = 90;
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59
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60 const double HANDLE_SIDE_LENGTH_CANVAS_COORD = 10.0;
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61 const double HIT_TEST_MAX_DISTANCE_CANVAS_COORD = 15.0;
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63 const uint8_t TEXT_COLOR_RED = 0;
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64 const uint8_t TEXT_COLOR_GREEN = 223;
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65 const uint8_t TEXT_COLOR_BLUE = 81;
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66
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67 const uint8_t TOOL_ANGLE_LINES_COLOR_RED = 0;
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68 const uint8_t TOOL_ANGLE_LINES_COLOR_GREEN = 183;
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69 const uint8_t TOOL_ANGLE_LINES_COLOR_BLUE = 17;
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70
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71 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_RED = 0;
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72 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_GREEN = 17;
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73 const uint8_t TOOL_ANGLE_LINES_HL_COLOR_BLUE = 183;
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74
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75 const uint8_t TOOL_LINES_COLOR_RED = 0;
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76 const uint8_t TOOL_LINES_COLOR_GREEN = 223;
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77 const uint8_t TOOL_LINES_COLOR_BLUE = 21;
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78
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79 const uint8_t TOOL_LINES_HL_COLOR_RED = 0;
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80 const uint8_t TOOL_LINES_HL_COLOR_GREEN = 21;
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81 const uint8_t TOOL_LINES_HL_COLOR_BLUE = 223;
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83 const uint8_t TEXT_OUTLINE_COLOR_RED = 0;
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84 const uint8_t TEXT_OUTLINE_COLOR_GREEN = 56;
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85 const uint8_t TEXT_OUTLINE_COLOR_BLUE = 21;
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86
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87 /**
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88 This object is responsible for hosting a scene, responding to messages from
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89 the model and updating the scene accordingly.
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90
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91 It contains the list of active measuring tools as well as the stack
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92 where measuring tool commands are stored.
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93
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94 The active tracker is also stored in the viewport controller.
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95
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96 Each canvas or other GUI area where we want to display a 2D image, either
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97 directly or through slicing must be assigned a ViewportController.
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98 */
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99 class ViewportController :
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100 public IObservable,
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101 public boost::enable_shared_from_this<ViewportController>
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102 {
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103 public:
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104 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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105 SceneTransformChanged, ViewportController);
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106
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107 ViewportController(boost::weak_ptr<UndoStack> undoStackW,
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108 boost::shared_ptr<IViewport> viewport);
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109
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110 ~ViewportController();
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111
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112 void SetInteractor(boost::shared_ptr<IViewportInteractor> interactor);
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113
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114 /**
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115 This method returns the list of measure tools containing the supplied point
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116 (in scene coords). A tracker can then be requested from the chosen
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117 measure tool, if needed
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118 */
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119 std::vector<boost::shared_ptr<MeasureTool> > HitTestMeasureTools(ScenePoint2D p);
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120
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121 /**
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122 This function will traverse the measuring tools and will clear their
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123 highlighted state
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124 */
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125 void ResetMeasuringToolsHighlight();
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126
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127 /**
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128 With this method, the object takes ownership of the supplied tracker and
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129 updates it according to user interaction
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130 */
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131 void AcquireActiveTracker(IFlexiblePointerTracker* tracker);
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132
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133 /** Forwarded to the underlying scene */
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134 AffineTransform2D GetCanvasToSceneTransform() const;
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135
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136 /** Forwarded to the underlying scene */
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137 AffineTransform2D GetSceneToCanvasTransform() const;
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138
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139 /** Forwarded to the underlying scene, and broadcasted to the observers */
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140 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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141
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142 /** Forwarded to the underlying scene, and broadcasted to the observers */
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143 void FitContent();
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144
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145 /** Adds a new measure tool */
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146 void AddMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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147
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148 /** Removes a measure tool or throws if it cannot be found */
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149 void RemoveMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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150
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151 /**
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152 The square handle side length in *scene* coordinates
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153 */
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154 double GetHandleSideLengthS() const;
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155
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156 /**
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157 The angle measure too arc radius in *scene* coordinates
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158
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159 Note: you might wonder why this is not part of the AngleMeasureTool itself,
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160 but we prefer to put all such constants in the same location, to ease
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161 */
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162 double GetAngleToolArcRadiusS() const;
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163
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164 /**
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165 The hit test maximum distance in *scene* coordinates.
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166 If a pointer event is less than GetHandleSideLengthS() to a GUI element,
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167 the hit test for this GUI element is seen as true
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168 */
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169 double GetHitTestMaximumDistanceS() const;
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170
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171 /**
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172 Distance between the top of the angle measuring tool and the center of
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173 the label showing the actual measure, in *scene* coordinates
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174 */
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175 double GetAngleTopTextLabelDistanceS() const;
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176
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177
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178 /** forwarded to the UndoStack */
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179 void PushCommand(boost::shared_ptr<MeasureCommand> command);
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180
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181 /** forwarded to the UndoStack */
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182 void Undo();
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183
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184 /** forwarded to the UndoStack */
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185 void Redo();
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186
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187 /** forwarded to the UndoStack */
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188 bool CanUndo() const;
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189
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190 /** forwarded to the UndoStack */
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191 bool CanRedo() const;
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192
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193 IViewport& GetViewport() const
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194 {
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195 return *viewport_;
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196 }
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197
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198
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199 // Must be expressed in canvas coordinates
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200 void HandleMousePress(const PointerEvent& event);
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201
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202 // Must be expressed in canvas coordinates
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203 void HandleMouseMove(const PointerEvent& event);
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204
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205 // Must be expressed in canvas coordinates
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206 void HandleMouseRelease(const PointerEvent& event);
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207
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208 private:
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209 double GetCanvasToSceneFactor() const;
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210
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211 boost::weak_ptr<UndoStack> undoStackW_; // Global stack, possibly shared by all viewports
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212 boost::shared_ptr<IViewport> viewport_;
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213 boost::shared_ptr<IViewportInteractor> interactor_; // Application-specific factory of trackers
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214 std::vector<boost::shared_ptr<MeasureTool> > measureTools_;
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215 boost::shared_ptr<IFlexiblePointerTracker> activeTracker_; // TODO - Can't this be a "std::auto_ptr"?
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216
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217 // this is cached
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218 double canvasToSceneFactor_;
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219 };
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220 }