From 09e9d9d991d58348a873fa4d7b8fbc3809b85c4a Mon Sep 17 00:00:00 2001
From: vsr <vsr@opencascade.com>
Date: Thu, 19 Jun 2008 09:21:03 +0000
Subject: [PATCH] Improve double values to string convertor to perform smart
 rounding of values.

---
 src/DlgRef/DlgRef_SpinBox.cxx | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/DlgRef/DlgRef_SpinBox.cxx b/src/DlgRef/DlgRef_SpinBox.cxx
index 35bec55ba..2a595b12d 100644
--- a/src/DlgRef/DlgRef_SpinBox.cxx
+++ b/src/DlgRef/DlgRef_SpinBox.cxx
@@ -29,6 +29,7 @@
 #include "DlgRef_SpinBox.h"
 
 #include <qvalidator.h>
+#include <math.h>
 
 //=================================================================================
 // class    : DlgRef_SpinBox()
@@ -105,9 +106,22 @@ void DlgRef_SpinBox::RangeStepAndValidator(double min, double max,double step,
 
 QString DlgRef_SpinBox::PrintDoubleValue (double theValue, int thePrecision)
 {
+  const double prec = 1e-12;
+
   QString aRes;
   aRes.setNum(theValue, 'g', thePrecision);
 
+  if ( prec > 0 ) {
+    int p = 0;
+    while ( p < thePrecision ) {
+      aRes.setNum( theValue, 'g', p++ );
+      double v = aRes.toDouble();
+      double err = fabs( theValue - v );
+      if ( err > 0 && err <= prec )
+	break;
+    }
+  }
+
   // remove trailing zeroes
   QString delim( "." );
 
-- 
2.39.2