added gizmo but not yet working

src/Vtk/vtkHandlerWidget.h

@@ -0,0 +1,111 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library is  distributed in  the hope that it will  be useful,
+  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
+  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+#ifndef U_VTKHANDLERWIDGET_H
+#define U_VTKHANDLERWIDGET_H
+
+#include "Math/Dense.h"
+#include "uLibVtkInterface.h"
+
+#include <vtk3DWidget.h>
+#include <vtkSmartPointer.h>
+
+// Forward declarations of VTK classes in global namespace
+class vtkActor;
+class vtkCallbackCommand;
+class vtkPropPicker;
+class vtkTransform;
+class vtkObject;
+class vtkRenderWindowInteractor;
+
+namespace uLib {
+namespace Vtk {
+
+/**
+ * @class vtkHandlerWidget
+ * @brief A Blender-like transform gizmo for move, rotate, and scale.
+ */
+class vtkHandlerWidget : public ::vtk3DWidget {
+public:
+  static vtkHandlerWidget *New();
+  vtkTypeMacro(vtkHandlerWidget, ::vtk3DWidget);
+
+  vtkHandlerWidget();
+  virtual ~vtkHandlerWidget();
+
+  virtual void SetEnabled(int enabling) override;
+  static void ProcessEvents(::vtkObject *caller, unsigned long event,
+                            void *clientdata, void *calldata);
+
+  void OnLeftButtonDown();
+  void OnLeftButtonUp();
+  void OnMouseMove();
+
+  enum InteractionState {
+    IDLE = 0,
+    TRANS_X,
+    TRANS_Y,
+    TRANS_Z,
+    ROT_X,
+    ROT_Y,
+    ROT_Z,
+    SCALE_X,
+    SCALE_Y,
+    SCALE_Z
+  };
+
+  using ::vtk3DWidget::PlaceWidget;
+  virtual void PlaceWidget(double bounds[6]) override;
+  virtual void PlaceWidget() override;
+
+  // Transform handling //
+  void SetTransform(::vtkTransform *t);
+  void GetTransform(::vtkTransform *t);
+
+protected:
+  void CreateGizmos();
+  void UpdateGizmoPosition();
+
+  int Interaction;
+
+  // Visual components //
+  vtkSmartPointer<::vtkActor> m_AxesX, m_AxesY, m_AxesZ;    // Arrows
+  vtkSmartPointer<::vtkActor> m_RotX, m_RotY, m_RotZ;       // Rings
+  vtkSmartPointer<::vtkActor> m_ScaleX, m_ScaleY, m_ScaleZ; // Cubes
+
+  vtkSmartPointer<::vtkPropPicker> m_Picker;
+
+  double StartEventPosition[2];
+  vtkSmartPointer<::vtkTransform> m_InitialTransform;
+
+private:
+  vtkHandlerWidget(const vtkHandlerWidget &) = delete;
+  void operator=(const vtkHandlerWidget &) = delete;
+};
+
+} // namespace Vtk
+} // namespace uLib
+
+#endif // U_VTKHANDLERWIDGET_H