Mercurial > hg > orthanc-stone

comparison 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
comparison
equal deleted inserted replaced
721:af0aa0c149fa 722:28b9e3a54200
23 #include "PointerTypes.h" 23 #include "PointerTypes.h"
24 24
25 #include <Framework/Scene2D/Scene2D.h> 25 #include <Framework/Scene2D/Scene2D.h>
26 #include <Framework/Scene2D/PointerEvent.h> 26 #include <Framework/Scene2D/PointerEvent.h>
27 #include <Framework/Scene2DViewport/IFlexiblePointerTracker.h> 27 #include <Framework/Scene2DViewport/IFlexiblePointerTracker.h>
28
29 #include <stack>
28 30
29 namespace OrthancStone 31 namespace OrthancStone
30 { 32 {
31 /** 33 /**
32 This object is responsible for hosting a scene, responding to messages from 34 This object is responsible for hosting a scene, responding to messages from
79 void SetSceneToCanvasTransform(const AffineTransform2D& transform); 81 void SetSceneToCanvasTransform(const AffineTransform2D& transform);
80 82
81 /** Forwarded to the underlying scene, and broadcasted to the observers */ 83 /** Forwarded to the underlying scene, and broadcasted to the observers */
82 void FitContent(unsigned int canvasWidth, unsigned int canvasHeight); 84 void FitContent(unsigned int canvasWidth, unsigned int canvasHeight);
83 85
86 /**
87 Stores a command :
88 - this first trims the undo stack to keep the first numAppliedCommands_
89 - then it adds the supplied command at the top of the undo stack
90
91 In other words, when a new command is pushed, all the undone (and not
92 redone) commands are removed.
93 */
94 void PushCommand(TrackerCommandPtr command);
95
96 /**
97 Undoes the command at the top of the undo stack, or throws if there is no
98 command to undo.
99 You can check "CanUndo" first to protect against extraneous redo.
100 */
101 void Undo();
102
103 /**
104 Redoes the command that is just above the last applied command in the undo
105 stack or throws if there is no command to redo.
106 You can check "CanRedo" first to protect against extraneous redo.
107 */
108 void Redo();
109
110 /** selfexpl */
111 bool CanUndo() const;
112
113 /** selfexpl */
114 bool CanRedo() const;
115
116 /** Adds a new measure tool */
117 void AddMeasureTool(MeasureToolPtr measureTool);
118
119 /** Removes a measure tool or throws if it cannot be found */
120 void RemoveMeasureTool(MeasureToolPtr measureTool);
121
84 private: 122 private:
85 Scene2DPtr scene_; 123 std::vector<TrackerCommandPtr> commandStack_;
86 FlexiblePointerTrackerPtr tracker_; 124
125 /**
126 This is always between >= 0 and <= undoStack_.size() and gives the
127 position where the controller is in the undo stack.
128 - If numAppliedCommands_ > 0, one can undo
129 - If numAppliedCommands_ < numAppliedCommands_.size(), one can redo
130 */
131 size_t numAppliedCommands_;
132 std::vector<MeasureToolPtr> measureTools_;
133 Scene2DPtr scene_;
134 FlexiblePointerTrackerPtr tracker_;
87 }; 135 };
88 } 136 }