From 6d5cdaee3efc09746c4dcd848555db8e3f78d629 Mon Sep 17 00:00:00 2001
From: vsr <vsr@opencascade.com>
Date: Tue, 18 Aug 2009 04:54:56 +0000
Subject: [PATCH] Issue 20099: Hide children Use AttributeExpandable to
 enable/disable showing of item's children

---
 src/SalomeApp/SalomeApp_DataModel.cxx  | 16 ++++++--
 src/SalomeApp/SalomeApp_DataObject.cxx | 51 ++++++++++++++++++++++++++
 src/SalomeApp/SalomeApp_DataObject.h   |  3 ++
 3 files changed, 67 insertions(+), 3 deletions(-)

diff --git a/src/SalomeApp/SalomeApp_DataModel.cxx b/src/SalomeApp/SalomeApp_DataModel.cxx
index 381dc68ae..1548ff23b 100644
--- a/src/SalomeApp/SalomeApp_DataModel.cxx
+++ b/src/SalomeApp/SalomeApp_DataModel.cxx
@@ -179,9 +179,19 @@ QList<kerPtr> SalomeApp_DataModelSync::children( const kerPtr& obj ) const
 {
   QList<kerPtr> ch;
 
-  _PTR(ChildIterator) it ( myStudy->NewChildIterator( obj ) );
-  for( ; it->More(); it->Next() )
-    ch.append( it->Value() );
+  _PTR( GenericAttribute ) anAttr;
+  bool expandable = true;
+  if ( obj && obj->FindAttribute( anAttr, "AttributeExpandable" ) ) {
+    _PTR(AttributeExpandable) aAttrExp = anAttr;
+    expandable = aAttrExp->IsExpandable();
+  }
+  
+  if ( expandable ) {
+    _PTR(ChildIterator) it ( myStudy->NewChildIterator( obj ) );
+    for ( ; it->More(); it->Next() )
+      ch.append( it->Value() );
+  }
+
   return ch;
 }
 
diff --git a/src/SalomeApp/SalomeApp_DataObject.cxx b/src/SalomeApp/SalomeApp_DataObject.cxx
index 72fd38592..a05f501fa 100644
--- a/src/SalomeApp/SalomeApp_DataObject.cxx
+++ b/src/SalomeApp/SalomeApp_DataObject.cxx
@@ -283,6 +283,23 @@ QString SalomeApp_DataObject::toolTip( const int /*id*/ ) const
   return QString( "Object \'%1\', module \'%2\', ID=%3" ).arg( name() ).arg( componentDataType() ).arg( entry() );
 }
 
+/*!
+  \brief Get font to be used for data object rendering in the item views
+  \param id column id
+  \return font to be used for the item rendering
+*/
+QFont SalomeApp_DataObject::font( const int id ) const
+{
+  QFont f = LightApp_DataObject::font( id );
+  if ( id == NameId ) {
+    if ( !expandable() && hasChildren() ) {
+      // set bold font to highlight the item which is non-expandable but has children
+      f.setBold( true );
+    }
+  }
+  return f;
+}
+
 /*!
   \brief Get component type.
   \return component type
@@ -341,6 +358,40 @@ _PTR(SObject) SalomeApp_DataObject::referencedObject() const
   return obj;
 }
 
+/*!
+  \brief Check if object has children
+  \return \c true if object has at least one child sub-object and \c false otherwise
+*/
+bool SalomeApp_DataObject::hasChildren() const
+{
+  bool ok = false;
+  _PTR(ChildIterator) it ( myObject->GetStudy()->NewChildIterator( myObject ) );
+  for ( ; it->More() && !ok; it->Next() ) {
+    _PTR(SObject) obj = it->Value();
+    if ( obj ) {
+      _PTR(SObject) refObj;
+      //if ( obj->ReferencedObject( refObj ) ) continue; // omit references
+      if ( obj->GetName() != "" ) ok = true;
+    }
+  }
+  return ok;
+}
+
+/*!
+  \brief Check if the object is expandable (e.g. in the data tree view)
+  \return \c true if object is expandable and \c false otherwise
+*/
+bool SalomeApp_DataObject::expandable() const
+{
+  bool exp = true;
+  _PTR(GenericAttribute) anAttr;
+  if ( myObject->FindAttribute( anAttr, "AttributeExpandable" ) ) {
+    _PTR(AttributeExpandable) aAttrExp = anAttr;
+    exp = aAttrExp->IsExpandable();
+  }
+  return exp;
+}
+
 /*!
   \brief Check if the specified column supports custom sorting.
   \param id column id
diff --git a/src/SalomeApp/SalomeApp_DataObject.h b/src/SalomeApp/SalomeApp_DataObject.h
index 8a0462f4d..b8f4b39a1 100644
--- a/src/SalomeApp/SalomeApp_DataObject.h
+++ b/src/SalomeApp/SalomeApp_DataObject.h
@@ -54,11 +54,14 @@ public:
   virtual QPixmap        icon( const int = NameId ) const;
   virtual QColor         color( const ColorRole, const int = NameId ) const;
   virtual QString        toolTip( const int = NameId ) const;
+  virtual QFont          font( const int = NameId ) const;
 
   virtual _PTR(SObject)  object() const;
 
   bool                   isReference() const;
   _PTR(SObject)          referencedObject() const;
+  bool                   hasChildren() const;
+  bool                   expandable() const;
 
   virtual QString        componentDataType() const;
 
-- 
2.39.2