TCustomAbstractGroupedEdit.NumbersOnly property
Indicates if the edit control accepts numeric values only.
Declaration
property NumbersOnly: Boolean read GetNumbersOnly write SetNumbersOnly default False;Description
NumbersOnly is a
Boolean property which indicates
whether the Text for the control is limited to characters which represent
numeric digits. The default value for the property is False, and allows any
character valid for the type to be entered. When set to
True, only the
characters '0'..'9' are accepted in Text. '+', '-', ',', and '.' are not
numeric digits.
The value for the property is read from and written to the NumbersOnly in the BaseEditor for the control (TGEEdit/TCustomMaskEdit).
NumbersOnly is not supported on all platform for the LCL; GTK 2 does not support the property.
Versions of Windows prior to Windows 95 did not enforce the ES_NUMBER style flag. It could be specified, but still allowed any value to be manually entered into the edit control. Some version of Windows allowed copy (Ctrl+C) and paste (Ctrl+V) to be used to insert non-numeric values - even when NumbersOnly is set to True.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.