Mercurial > hg > orthanc-stone

annotate Framework/Scene2DViewport/ViewportController.h @ 722:28b9e3a54200

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Undo mechanism implemented (not connected to UI yet). Undo stack and measuring tools are now handled by the ViewportController. Multi-touch does not crash trackers anymore.
author Benjamin Golinvaux <bgo@osimis.io>
date Tue, 21 May 2019 10:27:54 +0200
parents af0aa0c149fa
children c0fcb2757b0a
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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 "PointerTypes.h"
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24
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25 #include <Framework/Scene2D/Scene2D.h>
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26 #include <Framework/Scene2D/PointerEvent.h>
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27 #include <Framework/Scene2DViewport/IFlexiblePointerTracker.h>
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28
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29 #include <stack>
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30
698
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31 namespace OrthancStone
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32 {
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33 /**
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34 This object is responsible for hosting a scene, responding to messages from
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35 the model and updating the scene accordingly.
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36
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37 It contains the list of active measuring tools as well as the stack
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38 where measuring tool commands are stored.
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39
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40 The active tracker is also stored in the viewport controller.
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41
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42 Each canvas or other GUI area where we want to display a 2D image, either
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43 directly or through slicing must be assigned a ViewportController.
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44 */
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45 class ViewportController : public IObservable
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46 {
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47 public:
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48 ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(__FILE__, __LINE__, \
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49 SceneTransformChanged, ViewportController);
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50
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51 ViewportController(MessageBroker& broker);
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52
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53 Scene2DPtr GetScene();
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54
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55 /**
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56 This method is called by the GUI system and should update/delete the
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57 current tracker
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58 */
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59 bool HandlePointerEvent(PointerEvent e);
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60
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61 /**
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62 This method returns the list of measure tools containing the supplied point
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63 (in scene coords). A tracker can then be requested from the chosen
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64 measure tool, if needed
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65 */
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66 std::vector<MeasureToolPtr> HitTestMeasureTools(ScenePoint2D p);
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67
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68 /**
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69 With this method, the object takes ownership of the supplied tracker and
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70 updates it according to user interaction
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71 */
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72 void SetActiveTracker(FlexiblePointerTrackerPtr tracker);
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73
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74 /** Forwarded to the underlying scene */
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75 const AffineTransform2D& GetCanvasToSceneTransform() const;
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76
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77 /** Forwarded to the underlying scene */
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78 const AffineTransform2D& GetSceneToCanvasTransform() const;
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79
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80 /** Forwarded to the underlying scene, and broadcasted to the observers */
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81 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
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82
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83 /** Forwarded to the underlying scene, and broadcasted to the observers */
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84 void FitContent(unsigned int canvasWidth, unsigned int canvasHeight);
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85
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86 /**
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87 Stores a command :
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88 - this first trims the undo stack to keep the first numAppliedCommands_
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89 - then it adds the supplied command at the top of the undo stack
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90
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91 In other words, when a new command is pushed, all the undone (and not
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92 redone) commands are removed.
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93 */
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94 void PushCommand(TrackerCommandPtr command);
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95
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96 /**
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97 Undoes the command at the top of the undo stack, or throws if there is no
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98 command to undo.
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99 You can check "CanUndo" first to protect against extraneous redo.
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100 */
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101 void Undo();
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102
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103 /**
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104 Redoes the command that is just above the last applied command in the undo
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105 stack or throws if there is no command to redo.
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106 You can check "CanRedo" first to protect against extraneous redo.
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107 */
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108 void Redo();
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109
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110 /** selfexpl */
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111 bool CanUndo() const;
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112
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113 /** selfexpl */
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114 bool CanRedo() const;
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115
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116 /** Adds a new measure tool */
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117 void AddMeasureTool(MeasureToolPtr measureTool);
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118
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119 /** Removes a measure tool or throws if it cannot be found */
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120 void RemoveMeasureTool(MeasureToolPtr measureTool);
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121
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122 private:
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123 std::vector<TrackerCommandPtr> commandStack_;
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124
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125 /**
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126 This is always between >= 0 and <= undoStack_.size() and gives the
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127 position where the controller is in the undo stack.
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128 - If numAppliedCommands_ > 0, one can undo
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129 - If numAppliedCommands_ < numAppliedCommands_.size(), one can redo
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130 */
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131 size_t numAppliedCommands_;
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Benjamin Golinvaux <bgo@osimis.io>
parents: 721
diff changeset
132 std::vector<MeasureToolPtr> measureTools_;
28b9e3a54200 Undo mechanism implemented (not connected to UI yet). Undo stack and measuring
Benjamin Golinvaux <bgo@osimis.io>
parents: 721
diff changeset
133 Scene2DPtr scene_;
28b9e3a54200 Undo mechanism implemented (not connected to UI yet). Undo stack and measuring
Benjamin Golinvaux <bgo@osimis.io>
parents: 721
diff changeset
134 FlexiblePointerTrackerPtr tracker_;
698
8b6adfb62a2f Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
135 };
8b6adfb62a2f Code is broken -- stashing ongoing work in a branch
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
136 }