Why not...

[egsuh]

add NumberOnly property to TLabeledEdit like TEdit?

Or, is it difficult to make TDBLabeledEdit, or TRTTILabeledEdit?

[JuhaManninen]

AFAIK TLabeledEdit is there mostly for Delphi VCL compatibility.
It works poorly with the LCL's anchor system. Better use a separate TLabel and anchor it with a desired type of edit control.

[Bart]

add NumberOnly property to TLabeledEdit like TEdit?

Or, is it difficult to make TDBLabeledEdit, or TRTTILabeledEdit?

Since this component inherits from TCustomEdit, it already has a NumbersOnly property.
I published it in commit 76182b6c and put it up for merging to fixes_3 branch.

Bart

[wp]

However, NumbersOnly is not very useful. You cannot even enter neither a '-' for negative values nor a decimalseparator for floating point numbers. Simply: don't use it. Use a SpinEdit (FloatSpinEdit) or - if you don't like the spinner buttons - TSpinEditEx (TFloatSpinEditEx) with UpdownVisible=false.

[Bart]

However, NumbersOnly is not very useful.

Yet another thing we needed because Delphi has it (because Windows has it, but implemented it in a dumb-ass manor).
I'm sorry to say I ported it to Lazarus 

Fortunately it is off by default.

[wp]

BTW, do you know if this NumberOnly insanity happens only in Windows or also in other widgesets?

[Bart]

I would think on other WS it was implemented to behave as Windows does.
I would need to test though.
It's been a long time since this was discussed.

Bart