From d19ad9c812f71cbb38c425e9d736f213d83a5b23 Mon Sep 17 00:00:00 2001
From: vsr <vsr@opencascade.com>
Date: Mon, 14 Nov 2005 11:43:48 +0000
Subject: [PATCH] Fix a bug: an exception is raised when attempting to display
 root object

---
 src/LIGHTGUI/LIGHTGUI.cxx           |  2 +-
 src/LIGHTGUI/LIGHTGUI_DataModel.cxx | 17 +++++++++++++----
 src/LIGHTGUI/LIGHT_msg_en.po        |  5 ++++-
 3 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/src/LIGHTGUI/LIGHTGUI.cxx b/src/LIGHTGUI/LIGHTGUI.cxx
index 05aa062..548b847 100644
--- a/src/LIGHTGUI/LIGHTGUI.cxx
+++ b/src/LIGHTGUI/LIGHTGUI.cxx
@@ -278,7 +278,7 @@ void LIGHTGUI::onDisplayLine()
   double aX = 0, aY = 0, aZ = 0;
   QString aStrId = QString("LIGHTGUI_%1").arg(aPosition);
 
-  Handle(LIGHTGUI_TextPrs) aPrs = new LIGHTGUI_TextPrs( aLine, gp_Pnt( aX, aY, aZ ) );
+  Handle(LIGHTGUI_TextPrs) aPrs = new LIGHTGUI_TextPrs( aLine.isNull() ? "" : aLine, gp_Pnt( aX, aY, aZ ) );
   aPrs->SetOwner(new SALOME_InteractiveObject( aStrId, "" ) );
   SOCC_Prs* prs = dynamic_cast<SOCC_Prs*>( aViewer->CreatePrs() ); // aStringID is an "entry"
   if ( prs ) {
diff --git a/src/LIGHTGUI/LIGHTGUI_DataModel.cxx b/src/LIGHTGUI/LIGHTGUI_DataModel.cxx
index 2461565..5d7befe 100644
--- a/src/LIGHTGUI/LIGHTGUI_DataModel.cxx
+++ b/src/LIGHTGUI/LIGHTGUI_DataModel.cxx
@@ -309,9 +309,10 @@ bool LIGHTGUI_DataModel::insertLineBefore ( const int thePosition, const QString
   // Insert new line before the item at thePosition in the list,
   // or at the end() if thePosition is out of range
   LIGHTGUI_ModuleObject* modelRoot = dynamic_cast<LIGHTGUI_ModuleObject*>( root() );
-  if ( !modelRoot )
-    return false;
+  LightApp_Study* study = dynamic_cast<LightApp_Study*>( module()->application()->activeStudy() );
   if ( thePosition > 0 ) {
+    if ( !modelRoot )
+      return false;
     LIGHTGUI_DataObject* obj = findObject( thePosition );
     if ( !obj || !obj->parent() )
       return false;
@@ -345,8 +346,16 @@ bool LIGHTGUI_DataModel::insertLineBefore ( const int thePosition, const QString
   }
   else {
     // append new paragraph/line
-    theText.stripWhiteSpace().isEmpty() ? new LIGHTGUI_DataObject( theText, modelRoot ) : 
-                                          new LIGHTGUI_DataObject( theText, modelRoot->lastChild() );
+    if ( modelRoot )
+      theText.stripWhiteSpace().isEmpty() ? new LIGHTGUI_DataObject( theText, modelRoot ) : 
+	                                    new LIGHTGUI_DataObject( theText, modelRoot->lastChild() );
+    else {
+      QStringList lines;
+      if ( !theText.stripWhiteSpace().isEmpty() ) 
+	lines.append( theText );
+      buildTree( study->root(), lines );
+    }
+      
   }
   return true;
 }
diff --git a/src/LIGHTGUI/LIGHT_msg_en.po b/src/LIGHTGUI/LIGHT_msg_en.po
index 3ea89c2..88ce42d 100644
--- a/src/LIGHTGUI/LIGHT_msg_en.po
+++ b/src/LIGHTGUI/LIGHT_msg_en.po
@@ -149,6 +149,9 @@ msgstr "Wrong selection!"
 msgid "WRN_EDIT_FAILED"
 msgstr "Can't edit line!"
 
+msgid "WRN_ADD_FAILED"
+msgstr "Can't insert line!"
+
 msgid "WRN_UNKNOWN_COMMAND"
 msgstr "Unrecognized command!"
 
@@ -162,4 +165,4 @@ msgid "LIGHT_LINE"
 msgstr "Line"
 
 msgid "LIGHT_ROOT_TOOLTIP"
-msgstr "LIGHT module root object"
\ No newline at end of file
+msgstr "LIGHT module root object"
-- 
2.39.2