COMP: Fix Qt4/C++98 ctkDICOMTableView build error due to missing QJso…

…nObject

This commit exclude the parsing of "formatForField" and instead reported
the warning indicating that the specified format string failed to be
decoded from json.

Libs/DICOM/Widgets/ctkDICOMTableView.cpp

@@ -23,7 +23,9 @@
 #include "ui_ctkDICOMTableView.h"
 
 // Qt includes
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
 #include <QJsonObject>
+#endif
 #include <QMouseEvent>
 #include <QSortFilterProxyModel>
 #include <QSqlError>
@@ -209,6 +211,7 @@ void ctkDICOMTableViewPrivate::applyColumnProperties()
     QHeaderView::ResizeMode columnResizeMode = QHeaderView::Interactive;
     if (!fieldFormat.isEmpty())
     {
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
       QJsonDocument fieldFormatDoc = QJsonDocument::fromJson(fieldFormat.toUtf8());
       QJsonObject fieldFormatObj;
       if (!fieldFormatDoc.isNull())
@@ -262,6 +265,7 @@ void ctkDICOMTableViewPrivate::applyColumnProperties()
 
       }
       else
+#endif
       {
         // format string is specified but failed to be decoded from json
         qWarning() << "Invalid ColumnDisplayProperties Format string for column " << columnName << ": " << fieldFormat;