Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2DViewport/MeasureTool.h @ 1789:462d7a0e064e
added line measures to sdl single frame viewer sample
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 17 May 2021 11:55:21 +0200 |
parents | 9ac2a65d4172 |
children | 9b650ab68d4c |
rev | line source |
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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 * |
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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 "../Messages/ObserverBase.h" |
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25 #include "../Scene2D/PolylineSceneLayer.h" |
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26 #include "../Scene2D/Scene2D.h" |
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27 #include "../Scene2D/ScenePoint2D.h" |
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28 #include "../Scene2D/TextSceneLayer.h" |
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29 #include "../Scene2DViewport/PredeclaredTypes.h" |
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30 #include "../Scene2DViewport/ViewportController.h" |
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31 |
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32 #include <boost/weak_ptr.hpp> |
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33 |
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34 #include <vector> |
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35 #include <cmath> |
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36 |
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37 namespace OrthancStone |
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38 { |
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39 class IFlexiblePointerTracker; |
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40 class MeasureToolMemento; |
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41 |
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42 class MeasureTool : public ObserverBase<MeasureTool> |
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43 { |
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45 bool enabled_; | |
46 | |
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47 |
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48 protected: |
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49 explicit MeasureTool(boost::weak_ptr<IViewport> viewport); |
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50 |
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51 void PostConstructor(); |
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52 |
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53 /** |
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54 The measuring tool may exist in a standalone fashion, without any available |
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55 scene (because the controller is dead or dying). This call allows to check |
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56 before accessing the scene. |
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57 */ |
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58 bool IsSceneAlive() const; |
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59 |
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60 /** |
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61 This is the meat of the tool: this method must [create (if needed) and] |
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62 update the layers and their data according to the measure tool kind and |
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63 current state. This is repeatedly called during user interaction |
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64 */ |
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65 virtual void RefreshScene() = 0; |
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66 |
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67 /** |
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68 enabled_ is not accessible by subclasses because there is a state machine |
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69 that we do not wanna mess with |
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70 */ |
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71 bool IsEnabled() const; |
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72 |
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73 /** |
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74 Protected to allow sub-classes to use this weak pointer in factory methods |
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75 (pass them to created objects) |
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76 */ |
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77 boost::weak_ptr<IViewport> viewport_; |
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78 |
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79 /** |
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80 This will return a scoped lock to the viewport. |
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81 If the viewport does not exist anymore, then nullptr is returned. |
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82 */ |
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83 IViewport::ILock* GetViewportLock(); |
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84 IViewport::ILock* GetViewportLock() const; |
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85 |
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86 public: |
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87 virtual ~MeasureTool() |
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88 { |
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89 } |
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90 |
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91 /** |
1571 | 92 Enabled tools are rendered in the scene. |
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93 */ |
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94 void Enable(); |
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95 |
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96 /** |
1571 | 97 Disabled tools are not rendered in the scene. This is useful to be able |
98 to use them as their own memento in command stacks (when a measure tool | |
99 creation command has been undone, the measure remains alive in the | |
100 command object but is disabled so that it can be redone later on easily) | |
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101 */ |
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102 void Disable(); |
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103 |
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104 /** |
1571 | 105 This method is called when the scene transform changes. It allows to |
106 recompute the visual elements whose content depend upon the scene transform | |
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107 */ |
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108 void OnSceneTransformChanged( |
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109 const ViewportController::SceneTransformChanged& message); |
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110 |
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111 /** |
1571 | 112 This function must be implemented by the measuring tool to return whether |
113 a given point in scene coords is close to the measuring tool. | |
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114 |
1571 | 115 This is used for mouse hover highlighting. |
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116 |
1571 | 117 It is assumed that if the pointer position leads to this function returning |
118 true, then a click at that position will return a tracker to edit the | |
119 measuring tool | |
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120 */ |
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121 virtual bool HitTest(ScenePoint2D p) = 0; |
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122 |
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123 /** |
1571 | 124 This method must return a memento the captures the tool state (not including |
125 the highlighting state | |
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126 */ |
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127 virtual boost::shared_ptr<MeasureToolMemento> GetMemento() const = 0; |
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128 |
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129 /** |
1571 | 130 This method must apply the supplied memento (this requires RTTI to check |
131 the type) | |
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132 */ |
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133 virtual void SetMemento(boost::shared_ptr<MeasureToolMemento>) = 0; |
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134 |
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135 /** |
1571 | 136 This must create an edition tracker suitable for the supplied click position, |
137 or an empty pointer if no hit test (although this should have been checked | |
138 first) | |
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139 */ |
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140 virtual boost::shared_ptr<IFlexiblePointerTracker> CreateEditionTracker(const PointerEvent& e) = 0; |
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141 |
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142 /** |
1571 | 143 Will change the measuring tool to provide visual feedback on the GUI |
144 element that is in the pointer hit zone | |
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145 */ |
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146 virtual void Highlight(ScenePoint2D p) = 0; |
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147 |
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148 /** |
1571 | 149 This function must reset the visual highlighted hot zone feedback |
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150 */ |
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151 virtual void ResetHighlightState() = 0; |
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152 |
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153 /** |
1571 | 154 A description of the measuring tool, useful in debug logs |
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155 */ |
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156 virtual std::string GetDescription() = 0; |
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157 }; |
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158 |
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159 class MeasureToolMemento : public boost::noncopyable |
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160 { |
1571 | 161 public: |
162 virtual ~MeasureToolMemento() | |
163 { | |
164 } | |
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165 }; |
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166 |
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167 } |
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168 |
1571 | 169 //extern void TrackerSample_SetInfoDisplayMessage( |
170 // std::string key, std::string value); |