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annotate Framework/Scene2DViewport/ViewportController.h @ 858:e3c56d4f863f

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GuiAdapter : mouse event routing in SDL + split the undo stack from the ViewportController for multi-canvas apps + adapted the samples to this change
author Benjamin Golinvaux <bgo@osimis.io>
date Mon, 24 Jun 2019 10:31:04 +0200
parents 2b245953b44b
children a29c13497557
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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 "../Scene2D/Scene2D.h"
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26 #include "../Scene2D/PointerEvent.h"
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27 #include "../Scene2DViewport/IFlexiblePointerTracker.h"
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28
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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 class UndoStack;
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34
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35 const double ARC_RADIUS_CANVAS_COORD = 30.0;
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36 const double TEXT_CENTER_DISTANCE_CANVAS_COORD = 90;
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37
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38 const double HANDLE_SIDE_LENGTH_CANVAS_COORD = 10.0;
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39 const double HIT_TEST_MAX_DISTANCE_CANVAS_COORD = 15.0;
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40
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41 const uint8_t TEXT_COLOR_RED = 0;
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42 const uint8_t TEXT_COLOR_GREEN = 223;
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43 const uint8_t TEXT_COLOR_BLUE = 81;
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44
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45 const uint8_t TOOL_LINES_COLOR_RED = 0;
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46 const uint8_t TOOL_LINES_COLOR_GREEN = 223;
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47 const uint8_t TOOL_LINES_COLOR_BLUE = 21;
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49
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50 const uint8_t TEXT_OUTLINE_COLOR_RED = 0;
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51 const uint8_t TEXT_OUTLINE_COLOR_GREEN = 56;
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52 const uint8_t TEXT_OUTLINE_COLOR_BLUE = 21;
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53
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54 /**
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55 This object is responsible for hosting a scene, responding to messages from
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56 the model and updating the scene accordingly.
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57
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58 It contains the list of active measuring tools as well as the stack
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59 where measuring tool commands are stored.
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60
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61 The active tracker is also stored in the viewport controller.
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62
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63 Each canvas or other GUI area where we want to display a 2D image, either
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64 directly or through slicing must be assigned a ViewportController.
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65 */
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66 class ViewportController : public IObservable
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67 {
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68 public:
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69 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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70 SceneTransformChanged, ViewportController);
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71
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72 ViewportController(boost::weak_ptr<UndoStack> undoStackW, MessageBroker& broker);
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74 boost::shared_ptr<const Scene2D> GetScene() const;
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75 boost::shared_ptr<Scene2D> GetScene();
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76
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77 /**
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78 This method is called by the GUI system and should update/delete the
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79 current tracker
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80 */
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81 bool HandlePointerEvent(PointerEvent e);
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82
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83 /**
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84 This method returns the list of measure tools containing the supplied point
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85 (in scene coords). A tracker can then be requested from the chosen
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86 measure tool, if needed
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87 */
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88 std::vector<boost::shared_ptr<MeasureTool> > HitTestMeasureTools(ScenePoint2D p);
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89
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90 /**
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91 With this method, the object takes ownership of the supplied tracker and
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92 updates it according to user interaction
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93 */
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94 void SetActiveTracker(boost::shared_ptr<IFlexiblePointerTracker> tracker);
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95
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96 /** Forwarded to the underlying scene */
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97 const AffineTransform2D& GetCanvasToSceneTransform() const;
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98
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99 /** Forwarded to the underlying scene */
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100 const AffineTransform2D& GetSceneToCanvasTransform() const;
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101
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102 /** Forwarded to the underlying scene, and broadcasted to the observers */
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103 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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104
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105 /** Forwarded to the underlying scene, and broadcasted to the observers */
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106 void FitContent(unsigned int canvasWidth, unsigned int canvasHeight);
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107
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108 /** Adds a new measure tool */
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109 void AddMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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110
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111 /** Removes a measure tool or throws if it cannot be found */
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112 void RemoveMeasureTool(boost::shared_ptr<MeasureTool> measureTool);
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113
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114 /**
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115 The square handle side length in *scene* coordinates
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116 */
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117 double GetHandleSideLengthS() const;
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118
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119 /**
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120 The angle measure too arc radius in *scene* coordinates
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121
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122 Note: you might wonder why this is not part of the AngleMeasureTool itself,
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123 but we prefer to put all such constants in the same location, to ease
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124 */
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125 double GetAngleToolArcRadiusS() const;
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126
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127 /**
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128 The hit test maximum distance in *scene* coordinates.
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129 If a pointer event is less than GetHandleSideLengthS() to a GUI element,
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130 the hit test for this GUI element is seen as true
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131 */
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132 double GetHitTestMaximumDistanceS() const;
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133
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134 /**
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135 Distance between the top of the angle measuring tool and the center of
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136 the label showing the actual measure, in *scene* coordinates
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137 */
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138 double GetAngleTopTextLabelDistanceS() const;
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139
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140
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141 /** forwarded to the UndoStack */
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142 void PushCommand(boost::shared_ptr<TrackerCommand> command);
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143
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144 /** forwarded to the UndoStack */
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145 void Undo();
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146
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147 /** forwarded to the UndoStack */
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148 void Redo();
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149
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150 /** forwarded to the UndoStack */
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151 bool CanUndo() const;
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152
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153 /** forwarded to the UndoStack */
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154 bool CanRedo() const;
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155
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156
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157 private:
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158 double GetCanvasToSceneFactor() const;
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159
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160 boost::weak_ptr<UndoStack> undoStackW_;
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161
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162 boost::shared_ptr<UndoStack> GetUndoStack();
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163 boost::shared_ptr<const UndoStack> GetUndoStack() const;
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164
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165 std::vector<boost::shared_ptr<MeasureTool> > measureTools_;
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166 boost::shared_ptr<Scene2D> scene_;
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167 boost::shared_ptr<IFlexiblePointerTracker> tracker_;
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168
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169 // this is cached
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170 mutable double canvasToSceneFactor_;
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171 };
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172 }