0024835: Graphic structure for highlighting is not erased if presentable object for highlight is deleted

Corrections in highlight state checks.

src/PrsMgr/PrsMgr_Presentation.cdl

@@ -50,8 +50,7 @@ is
   Display (me : mutable;
            theIsHighlight : Boolean from Standard)
   is static private;
-  ---Purpose: Displays myStructure and sets myDisplayReason to theIsHighlight value if
-  -- myStructure was not displayed or was invisible
+  ---Purpose: Displays myStructure.
 
   Erase (me : mutable)
   is virtual private;
@@ -92,7 +91,7 @@ is
 
   Color (me       : mutable;
          theColor : NameOfColor from Quantity)
-  is static private;
+  is virtual private;
 
   BoundBox (me)
   is static private;
@@ -188,7 +187,7 @@ fields
   myStructure           : Prs from PrsMgr;
   myPresentableObject   : PresentableObjectPointer from PrsMgr;
   myMustBeUpdated       : Boolean from Standard;
-  myDisplayReason       : Boolean from Standard;
+  myBeforeHighlightState: Integer from Standard;
 
 friends
 

src/PrsMgr/PrsMgr_Presentation.cxx

@@ -21,16 +21,33 @@
 #include <Visual3d_View.hxx>
 #include <Precision.hxx>
 
+namespace
+{
+  enum BeforeHighlightState
+  {
+    State_Empty,
+    State_Hidden,
+    State_Visible
+  };
+
+  static BeforeHighlightState StructureState(const Handle(PrsMgr_Prs) theStructure)
+  {
+    return !theStructure->IsDisplayed() ?
+      State_Empty : !theStructure->IsVisible() ?
+        State_Hidden : State_Visible;
+  }
+}
+
 //=======================================================================
 //function : PrsMgr_Presentation
 //purpose  :
 //=======================================================================
 PrsMgr_Presentation::PrsMgr_Presentation (const Handle(PrsMgr_PresentationManager3d)& thePrsMgr,
                                           const Handle(PrsMgr_PresentableObject)&     thePrsObject)
-: myPresentationManager (thePrsMgr),
-  myPresentableObject   (thePrsObject.operator->()),
-  myMustBeUpdated       (Standard_False),
-  myDisplayReason       (Standard_False)
+: myPresentationManager  (thePrsMgr),
+  myPresentableObject    (thePrsObject.operator->()),
+  myMustBeUpdated        (Standard_False),
+  myBeforeHighlightState (State_Empty)
 {
   myStructure = new PrsMgr_Prs (thePrsMgr->StructureManager(),
                                 this, thePrsObject->TypeOfPresentation3d());
@@ -44,24 +61,22 @@ PrsMgr_Presentation::PrsMgr_Presentation (const Handle(PrsMgr_PresentationManage
 void PrsMgr_Presentation::Display()
 {
   Display (Standard_False);
-  myDisplayReason = Standard_False;
+  myBeforeHighlightState = State_Visible;
 }
 
 //=======================================================================
 //function : Display
 //purpose  :
 //=======================================================================
-void PrsMgr_Presentation::Display (const Standard_Boolean theIsHighlight)
+void PrsMgr_Presentation::Display (const Standard_Boolean /*theIsHighlight*/)
 {
   if (!myStructure->IsDisplayed())
   {
     myStructure->Display();
-    myDisplayReason = theIsHighlight;
   }
   else if (!myStructure->IsVisible())
   {
-    myStructure->SetVisible (Standard_True);
-    myDisplayReason = theIsHighlight;
+    SetVisible (Standard_True);
   }
 }
 
@@ -100,6 +115,11 @@ void PrsMgr_Presentation::SetVisible (const Standard_Boolean theValue)
 //=======================================================================
 void PrsMgr_Presentation::Highlight()
 {
+  if (!IsHighlighted())
+  {
+    myBeforeHighlightState = StructureState (myStructure);
+  }
+
   Display (Standard_True);
   myStructure->Highlight();
 }
@@ -111,9 +131,16 @@ void PrsMgr_Presentation::Highlight()
 void PrsMgr_Presentation::Unhighlight() const
 {
   myStructure->UnHighlight();
-  if (myDisplayReason)
+  switch (myBeforeHighlightState)
   {
+ case State_Visible:
+    return;
+ case State_Hidden:
     myStructure->SetVisible (Standard_False);
+    break;
+ case State_Empty:
+    myStructure->Erase();
+    break;
   }
 }
 
@@ -145,6 +172,11 @@ void PrsMgr_Presentation::Clear()
 //=======================================================================
 void PrsMgr_Presentation::Color (const Quantity_NameOfColor theColor)
 {
+  if (!IsHighlighted())
+  {
+    myBeforeHighlightState = StructureState (myStructure);
+  }
+
   Display (Standard_True);
   myStructure->Color (theColor);
 }
@@ -165,8 +197,7 @@ void PrsMgr_Presentation::BoundBox() const
 Standard_Boolean PrsMgr_Presentation::IsDisplayed() const
 {
   return  myStructure->IsDisplayed()
-      &&  myStructure->IsVisible()
-      && !myDisplayReason;
+      &&  myStructure->IsVisible();
 }
 
 //=======================================================================
@@ -375,6 +406,8 @@ void PrsMgr_Presentation::Destroy()
 {
   if (!myStructure.IsNull())
   {
+    // Remove structure from the list of displayed structures.
+    myStructure->Erase();
     myStructure->Clear();
     myStructure.Nullify();
   }

tests/bugs/vis/bug24835

@@ -0,0 +1,21 @@
+puts "============"
+puts "CR24835"
+puts "============"
+puts ""
+####################################################################################################
+#  Graphic structure for highlighting is not erased if presentable object for highlight is deleted.
+####################################################################################################
+
+pload ALL
+vinit v
+box b 1 1 1
+vdisplay b
+vfit
+vselmode b 1 1
+vmoveto 380 104 
+vmoveto 29 103
+vremove b
+vclose v 1
+vinit
+
+set only_screen 1