Armature AlwaysOnTop option

This option governs if the bones are seen on top of every object of the
scene. This is set to every bone of the armature when changed.

See Issue#13616

Libs/VTK/Widgets/Testing/vtkBoneWidgetTwoBonesTestRotationMatrix.cxx

@@ -281,7 +281,7 @@ class Test1KeyPressInteractorStyle : public vtkInteractorStyleTrackballCamera
 
         //Axes->SetUserTransform(transform);
         //}
-      if (key == "Control_L")
+      else if (key == "Control_L")
         {
         Armature->SetWidgetState( ! Armature->GetWidgetState() );
         }
@@ -294,6 +294,14 @@ class Test1KeyPressInteractorStyle : public vtkInteractorStyleTrackballCamera
           }
         Armature->SetShowAxes(state);
         }
+
+      else if (key == "space")
+        {
+        std::cout<<"Changing Always on Top!"<<std::endl;
+
+        Armature->SetBonesAlwaysOnTop( ! Armature->GetBonesAlwaysOnTop());
+        }
+
       }
 
   vtkArmatureWidget* Armature;

Libs/VTK/Widgets/vtkArmatureWidget.cxx

@@ -179,6 +179,7 @@ vtkArmatureWidget::vtkArmatureWidget()
   this->ShowAxes = vtkBoneWidget::Hidden;
   this->ShowParenthood = true;
   this->ShouldResetPoseToRest = true;
+  this->BonesAlwaysOnTop = 0;
 }
 
 //----------------------------------------------------------------------------
@@ -502,6 +503,11 @@ ::SetBoneRepresentation(vtkBoneWidget* bone, int representationType)
       break;
       }
     }
+
+  if (bone->GetBoneRepresentation())
+    {
+    bone->GetBoneRepresentation()->SetAlwaysOnTop(this->BonesAlwaysOnTop);
+    }
 }
 
 //----------------------------------------------------------------------------
@@ -691,6 +697,28 @@ void vtkArmatureWidget::ResetPoseToRest()
     }
 }
 
+//----------------------------------------------------------------------------
+void vtkArmatureWidget::SetBonesAlwaysOnTop(int onTop)
+{
+  if (onTop == this->BonesAlwaysOnTop)
+    {
+    return;
+    }
+  this->BonesAlwaysOnTop = onTop;
+
+  if (this->GetBonesRepresentationType() != vtkArmatureWidget::None)
+    {
+    for (NodeIteratorType it = this->Bones->begin();
+      it != this->Bones->end(); ++it)
+      {
+      (*it)->Bone->GetBoneRepresentation()->SetAlwaysOnTop(
+        this->BonesAlwaysOnTop);
+      }
+    }
+
+  this->Modified();
+}
+
 //----------------------------------------------------------------------------
 void vtkArmatureWidget
 ::SetBoneWorldToParentTransform(vtkBoneWidget* bone, vtkBoneWidget* parent)

Libs/VTK/Widgets/vtkArmatureWidget.h

@@ -235,14 +235,21 @@ class VTK_BENDER_WIDGETS_EXPORT vtkArmatureWidget : public vtkAbstractWidget
   // Description:
   // Change the given bone parent to the new parent.
   // If the new parent is null, the bone is added to the top level bones.
-  // Sa AddBone(), RemoveBone, ArmatureEventType
+  // @sa AddBone(), RemoveBone, ArmatureEventType
   void ReparentBone(vtkBoneWidget* bone, vtkBoneWidget* newParent);
 
   // Description:
   // Reset the pose positions to the initial rest position with no rotations
   // or translations.
   void ResetPoseToRest();
 
+  // Description:
+  // Set if the bones are seen on top of every object of the scene.
+  // This can be set even if the bones do not have any representation.
+  // @sa vtkBoneRepresentation
+  void SetBonesAlwaysOnTop(int onTop);
+  vtkGetMacro(BonesAlwaysOnTop, int);
+
 protected:
   vtkArmatureWidget();
   ~vtkArmatureWidget();
@@ -267,6 +274,7 @@ class VTK_BENDER_WIDGETS_EXPORT vtkArmatureWidget : public vtkAbstractWidget
   int ShowAxes;
   int ShowParenthood;
   bool ShouldResetPoseToRest;
+  int BonesAlwaysOnTop;
 
   // Add/Remove all the necessaries observers to a bone
   void AddBoneObservers(vtkBoneWidget* bone);