Improve frequency input validation

Allow group separators as well as decimal points in MHz input fields

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7462 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

FrequencyLineEdit.cpp

@@ -1,16 +1,45 @@
 #include "FrequencyLineEdit.hpp"
 
-#include <QRegExpValidator>
-#include <QRegExp>
+#include <limits>
+
+#include <QDoubleValidator>
 #include <QString>
 #include <QLocale>
 
 #include "moc_FrequencyLineEdit.cpp"
 
+namespace
+{
+  class MHzValidator
+    : public QDoubleValidator
+  {
+  public:
+    MHzValidator (double bottom, double top, QObject * parent = nullptr)
+      : QDoubleValidator {bottom, top, 6, parent}
+    {
+    }
+
+    State validate (QString& input, int& pos) const override
+    {
+      State result = QDoubleValidator::validate (input, pos);
+      if (Acceptable == result)
+        {
+          bool ok;
+          (void)QLocale {}.toDouble (input, &ok);
+          if (!ok)
+            {
+              result = Intermediate;
+            }
+        }
+      return result;
+    }
+  };
+}
+
 FrequencyLineEdit::FrequencyLineEdit (QWidget * parent)
   : QLineEdit (parent)
 {
-  setValidator (new QRegExpValidator {QRegExp {QString {R"(\d{0,6}(\)"} + QLocale {}.decimalPoint () + R"(\d{0,6})?)"}, this});
+  setValidator (new MHzValidator {0., std::numeric_limits<Radio::Frequency>::max () / 10.e6, this});
 }
 
 auto FrequencyLineEdit::frequency () const -> Frequency
@@ -27,7 +56,8 @@ void FrequencyLineEdit::frequency (Frequency f)
 FrequencyDeltaLineEdit::FrequencyDeltaLineEdit (QWidget * parent)
   : QLineEdit (parent)
 {
-  setValidator (new QRegExpValidator {QRegExp {QString {R"(-?\d{0,6}(\)"} + QLocale {}.decimalPoint () + R"(\d{0,6})?)"}, this});
+  setValidator (new MHzValidator {-std::numeric_limits<FrequencyDelta>::max () / 10.e6,
+        std::numeric_limits<FrequencyDelta>::max () / 10.e6, this});
 }
 
 auto FrequencyDeltaLineEdit::frequency_delta () const -> FrequencyDelta