- added new `QString QgsField::displayType( const bool showConstraints = false )` to unify the display of field types whenever length or precision are present
- added new argument `expression` to `QgsFieldModel::fieldToolTip( const QgsField &field, const QString &expression = QStringLiteral() )`. Now the tooltip shows "<alias> (<field>)\n<type>\n<comment>\n<expression>" with appropriate formatting
- added meaningful field tooltips in the "Identify Results" dialog
- field tooltips show the same content in "Feature Attributes" form, "Attribute Table" and "Identify Tool"
Fixes#15144
This adds another method to display field names with alias, this is to be used when
working close to the data structure (sql builder, expressions etc.) when the information
in the alias is sometimes fundamental to indentify what the field contains.
displayNameWithAlias is now used (insted of field name) in:
expressions dialog
query builder
The format is:
alias (field_name)
and, in case there is no alias:
field_name
All your uses of toUtf8().data() actually just need a const char*
So use constData() that is semantically more correct, and documented
to be faster.
From http://doc.qt.io/qt-5/qbytearray.html#data
"For read-only access, constData() is faster because it never
causes a deep copy to occur."
