| Geant4 Cross Reference |
1 //
2 // ********************************************************************
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24 // ********************************************************************
25 //
26 //
27
28 // Class Description:
29 //
30 // G4VUserVisAction is brought into effect by the command
31 // /vis/scene/add/userAction. The vis manager instantiates a
32 // G4CallbackModel when the vis action is registered, and adds
33 // it to the scene. The pure virtual Draw() method
34 // is invoked whenever the viewer needs to "visit the kernel", e.g.,
35 // to remake its graphical database, if any, or simply to refresh the
36 // screen. It is not intended to be called directly. It is called
37 // via the operator() which is defined to satisfy the template
38 // G4CallbackModel<G4VUserVisAction>.
39 //
40 // A concrete Draw() method would normally make use of the Draw() methods
41 // of the vis manager, e.g:
42 // G4VVisManager* pVisManager = G4VVisManager::GetConcreteInstance();
43 // if (pVisManager) {
44 // pVisManager->Draw(G4Box("box",2*cm,2*cm,2*cm),
45 // G4VisAttributes(G4Colour(1,1,0)));
46 // ...
47 // but it can also use pointers fpSceneHandler and pMP that give it
48 // direct access to the current scene handler and modeling parameters
49 // for more advanced use.
50 //
51 // See the User Guide for Application Developers.
52
53 #ifndef G4VUSERVISACTION_HH
54 #define G4VUSERVISACTION_HH
55
56 class G4VGraphicsScene;
57 class G4ModelingParameters;
58
59 class G4VUserVisAction
60 {
61 public: // With description
62 G4VUserVisAction(): fpSceneHandler(nullptr), fpMP(nullptr) {}
63 virtual ~G4VUserVisAction() {}
64 void operator()(G4VGraphicsScene& scene, const G4ModelingParameters* pMP) {
65 fpSceneHandler = &scene;
66 fpMP = pMP;
67 Draw();
68 }
69 protected:
70 virtual void Draw() = 0;
71 G4VGraphicsScene* fpSceneHandler;
72 const G4ModelingParameters* fpMP;
73 };
74
75 #endif
76