toString special case 0

GUI/View/Numeric/DoubleSpinBox.cpp

@@ -17,17 +17,20 @@
 #include "Base/Util/StringUtil.h"
 #include "GUI/Model/Descriptor/DoubleProperty.h"
 #include "GUI/View/Numeric/NumberUtil.h"
+#include <QRegularExpression>
 #include <QWheelEvent>
 
 namespace {
 
 QString toString(double val, int decimal_points = 4)
 {
+    if (val == 0)
+        return "0";
+
     QString result = (val >= 1000 || val < 0.1) ? QString::number(val, 'e', decimal_points)
                                                 : QString::number(val, 'f', decimal_points);
 
-    return result.replace(QRegularExpression("(\\.?0+)?((e{1}[\\+|-]{1})(0+)?([1-9]{1}.*))?$"),
-                          "\\3\\5");
+    return result.replace(QRegularExpression("(\\.?0+)?((e[\\+|-])(0+)?([1-9].*))?$"), "\\3\\5");
 }
 
 } // namespace