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comparison Samples/Common/MeasureTools.h @ 654:462a5074f914

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Turned the scene into an observable to be able to dynamically react to scene to canvas transform changes --> now the handles and angle measure adornments are immune to zoom changes
author Benjamin Golinvaux <bgo@osimis.io>
date Tue, 14 May 2019 13:51:00 +0200
parents 1e9ed656318e
children cb3b76d16234
comparison
equal deleted inserted replaced
653:4eccf698e52f 654:462a5074f914
31 #include <vector> 31 #include <vector>
32 #include <cmath> 32 #include <cmath>
33 33
34 namespace OrthancStone 34 namespace OrthancStone
35 { 35 {
36 class MeasureTool 36 class MeasureTool : public IObserver
37 { 37 {
38 public: 38 public:
39 virtual ~MeasureTool() {} 39 virtual ~MeasureTool();
40 40
41 /** 41 /**
42 Enabled tools are rendered in the scene. 42 Enabled tools are rendered in the scene.
43 */ 43 */
44 void Enable(); 44 void Enable();
49 creation command has been undone, the measure remains alive in the 49 creation command has been undone, the measure remains alive in the
50 command object but is disabled so that it can be redone later on easily) 50 command object but is disabled so that it can be redone later on easily)
51 */ 51 */
52 void Disable(); 52 void Disable();
53 53
54 /**
55 This method is called when the scene transform changes. It allows to
56 recompute the visual elements whose content depend upon the scene transform
57 */
58 void OnSceneTransformChanged(const Scene2D::SceneTransformChanged& message);
59
54 protected: 60 protected:
55 MeasureTool(Scene2D& scene) 61 MeasureTool(MessageBroker& broker, Scene2D& scene);
56 : scene_(scene) 62
57 , enabled_(true)
58 {
59 }
60
61
62
63 /** 63 /**
64 This is the meat of the tool: this method must [create (if needed) and] 64 This is the meat of the tool: this method must [create (if needed) and]
65 update the layers and their data according to the measure tool kind and 65 update the layers and their data according to the measure tool kind and
66 current state. This is repeatedly called during user interaction 66 current state. This is repeatedly called during user interaction
67 */ 67 */
68 virtual void RefreshScene() = 0; 68 virtual void RefreshScene() = 0;
69 69
70 Scene2D& GetScene() 70 Scene2D& GetScene();
71 {
72 return scene_;
73 }
74 71
75 /** 72 /**
76 enabled_ is not accessible by subclasses because there is a state machine 73 enabled_ is not accessible by subclasses because there is a state machine
77 that we do not wanna mess with 74 that we do not wanna mess with
78 */ 75 */
79 bool IsEnabled() const 76 bool IsEnabled() const;
80 {
81 return enabled_;
82 }
83 77
84 private: 78 private:
85 Scene2D& scene_; 79 Scene2D& scene_;
86 bool enabled_; 80 bool enabled_;
87 }; 81 };