include/svx/e3dsceneupdater.hxx

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  19
  20 #ifndef INCLUDED_SVX_E3DSCENEUPDATER_HXX
  21 #define INCLUDED_SVX_E3DSCENEUPDATER_HXX
  22
  23 #include <svx/svxdllapi.h>
  24
  25 class SdrObject;
  26 class E3dScene;
  27
  28 namespace drawinglayer { namespace geometry {
  29     class ViewInformation3D;
  30 }}
  31
  32 // This class is a helper to encapsulate 3D object changes which shall change the
  33 // scene's 2D geometry. E.g. when moving one 3D object in a scene, the visualisation
  34 // would not change since the scene's 2D attributes are defined by it's 2D object
  35 // transformation and the changed content would be projected to the same 2D bounds
  36 // as before. To reflect the fact that the 2D positions may 'change' for the user's
  37 // imagination, it is necessary to calculate a new 2D object transformation of the scene
  38 // (the SnapRect) using the old 3D transformation stack and the eventually changed
  39 // 3D content and tu use it. This is only wanted if changes to the scene's
  40 // content are intended to change the scene's 2D geometry attributes
  41
  42 class SVX_DLLPUBLIC E3DModifySceneSnapRectUpdater
  43 {
  44     // the scene which may be changed. This gets set to the outmost scene
  45     // of the to-be-changed 3D object when the scene has a 3d transformation
  46     // stack at construction time. In all other cases it's set to zero and
  47     // no action needs to be taken
  48     E3dScene*                                   mpScene;
  49
  50     // the 3d transformation stack at the time of construction, valid when
  51     // mpScene is not zero
  52     drawinglayer::geometry::ViewInformation3D*  mpViewInformation3D;
  53
  54 public:
  55     // the constructor evaluates and sets the members at construction time
  56     E3DModifySceneSnapRectUpdater(const SdrObject* pObject);
  57
  58     // the destructor will take action if mpScene is not zero and modify the
  59     // 2D geomeztry of the target scene
  60     ~E3DModifySceneSnapRectUpdater();
  61 };
  62
  63 #endif // INCLUDED_SVX_E3DSCENEUPDATER_HXX
  64
  65 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */