Improve VariableView's tooltip handling.

- Make GetToolTipInfo() sensitive to the column being hovered over.
  If hovering over the variable name, we display its value location
  information as before. However, if hovering over the value column,
  the tooltip now displays the full value of the variable, if
  available.

src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp

@@ -1248,22 +1248,26 @@ VariablesView::VariableTableModel::GetToolTipForTablePath(
 	if (node->NodeChild()->LocationResolutionState() != B_OK)
 		return false;
 
-	ValueLocation* location = node->NodeChild()->Location();
 	BString tipData;
+	switch (columnIndex) {
+		case 0:
+		{
+			ValueLocation* location = node->NodeChild()->Location();
 			for (int32 i = 0; i < location->CountPieces(); i++) {
 				ValuePieceLocation piece = location->PieceAt(i);
 				BString pieceData;
 				switch (piece.type) {
 					case VALUE_PIECE_LOCATION_MEMORY:
-				pieceData.SetToFormat("(%" B_PRId32 "): Address: %#" B_PRIx64
+						pieceData.SetToFormat("(%" B_PRId32 "): Address: %#"
-					", Size: %" B_PRId64 " bytes", i, piece.address, piece.size);
+							B_PRIx64 ", Size: %" B_PRId64 " bytes", i,
+							piece.address, piece.size);
 						break;
 					case VALUE_PIECE_LOCATION_REGISTER:
 					{
-				Architecture* architecture = fThread->GetTeam()->GetArchitecture();
+						Architecture* architecture = fThread->GetTeam()
+							->GetArchitecture();
 						pieceData.SetToFormat("(%" B_PRId32 "): Register (%s)",
 							i, architecture->Registers()[piece.reg].Name());
-
 						break;
 					}
 					default:
@@ -1274,6 +1278,19 @@ VariablesView::VariableTableModel::GetToolTipForTablePath(
 				if (i < location->CountPieces() - 1)
 					tipData += "\n";
 			}
+			break;
+		}
+		case 1:
+		{
+			Value* value = node->GetValue();
+			if (value != NULL)
+				value->ToString(tipData);
+
+			break;
+		}
+		default:
+			break;
+	}
 
 	if (tipData.IsEmpty())
 		return false;