Hi David,
johnl wrote:
> Does anyone have an example of how to use a validator with textfield?
> Specifically I'm interested in validating floating point numbers.
The validation system is quite neat and attaches a callback function to
a textfield to perform the check. For instance, you could use parseFloat
as the basis of a routine to check the value.
Another approach is to use a Regular Expression:
var validator_cb =
qx.ui.form.TextField.createRegExpValidator(new RegExp('^\\d+'));
(I know you said you wanted to check for floating point numbers, but
wasn't sure where you needed 'e' notion etc. There will be many REs on
the web)
In both cases you then associate the function with the text field.
field.setValidator(validator_cb);
Later you call isValid on the text field to validate it. What I then do
is something like
field.setBackgroundColor("#FFc4c4");
if is doesn't pass.
Hopefully that should get you a bit further forwards,
Regards,
Nick
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