TDBEdit.UTF8KeyPress procedure
Handles UTF-8 characters for the data-aware control.
Declaration
procedure UTF8KeyPress(var UTF8Key: TUTF8Char); overrideArguments
UTF8Key | UTF-8 character examined in the method. |
Description
UTF8KeyPress is an overridden method in TDBEdit. UTF8KeyPress
calls the inherited method, and performs actions needed to handle the
UTF-8-encoded character specified in the
UTF8Key argument.
UTF8KeyPress checks the value in UTF8Key to determine the number of bytes
required for the code point. A single-byte code point is converted to a Char
type, and passed to the FieldCanAcceptKey routine to validate its
content for the Field in the control. Multi-byte Unicode code points are
ignored, and the Extended ASCII NbSp character (Decimal 255) is passed
to FieldCanAcceptKey. The value in UTF8Key is set to an empty string if it is
valid for the Field.
Use the OnUTF8KeyPress event handler to handle/convert specific multi-byte character values.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.