You are over engineering this.
Here is what I did (not completed yet):
TfrmCalculator = class (TForm)
edtAmount : TEdit ;
edtPerc : TEdit ;
edtResult : TEdit ;
procedure edtAmountKeyDown (Sender : TObject ; var Key : Word ;
Shift : TShiftState );
procedure edtAmountKeyP
> David Emerson wrote:
> > at first I overlooked "e+" which is valid for val (string, real)
Alexander Klenin wrote:
> No, it is not:
> Val('e+', x, d);
What I meant is that I first overlooked 'e' and '+' as valid characters
that can appear together within a string to be converted to a float.
On Tue, Dec 8, 2009 at 14:50, waldo kitty wrote:
> sorry but what is the code below supposed to be showing??
>> On Tue, Dec 8, 2009 at 03:49, David Emerson wrote:
>>> at first I overlooked "e+" which is valid for val (string, real)
To which i replied:
> Alexander Klenin wrote:
>> No, it is not
sorry but what is the code below supposed to be showing??
Alexander Klenin wrote:
On Tue, Dec 8, 2009 at 03:49, David Emerson wrote:
Of course, if you have a set of all the valid characters
['-', '.', '0'..'9', 'e', 'E', '+'], it's not unreasonable to restrict
characters outside that set. But
On Tue, Dec 8, 2009 at 03:49, David Emerson wrote:
> Of course, if you have a set of all the valid characters
> ['-', '.', '0'..'9', 'e', 'E', '+'], it's not unreasonable to restrict
> characters outside that set. But make sure the set is complete-- at
> first I overlooked "e+" which is valid for
> You can use any input component, and check e.g. in OnKeyPress whether
> the resulting string would be valid. If not, reject the input
> character.
>
> You can use any regex library for the check, but IMO that's overkill
> with a single constant format. In your case I'd use the conversion
> f
ik schrieb:
I'm trying to create some sort of calculator for specific task.
I require to allow to input only floating point or integer numbers.
I thought to use TMaskEdit for it, but how can i tell it a rule to allow
me arbitrary number length including a floating point on arbitrary
position ?
Hello,
I'm trying to create some sort of calculator for specific task.
I require to allow to input only floating point or integer numbers.
I thought to use TMaskEdit for it, but how can i tell it a rule to allow me
arbitrary number length including a floating point on arbitrary position ?
In rege
