Enabling/ Disabling Save/ Cancel Buttons

[P.G.Taboada]

Hi,

I would like to enable/ disable the "save/ ok/ cancel" buttons uppon
form state.

What is the best approach?

brgds,

Papick

[Andrew Pietsch]

Howdy,

You can use the command.enabledWhen(ValueModel<Boolean>) method to specify a condition to trigger enabling and disabling a command.  There's also a disableWhen(...) version if that reads better. 

Cheers

[P.G.Taboada]

Hi,

I have seen this in the samples, but what I need is to enable/ disable
widgets upon validation state changes.

So I need to build a ValueModel holding a boolean and have it being
changed by the validation calls on my model?

brgds

Papick

On 22 Jul., 15:02, Andrew Pietsch <and...@pietschy.com> wrote:
> Howdy,
>
> You can use the command.enabledWhen(ValueModel<Boolean>) method to specify a
> condition to trigger enabling and disabling a command.  There's also a
> disableWhen(...) version if that reads better.
>
> Cheers
>

[Andrew Pietsch]

On 22 July 2010 23:43, P.G.Taboada <pgta...@googlemail.com> wrote:

Hi,

I have seen this in the samples, but what I need is to enable/ disable
widgets upon validation state changes.

So I need to build a ValueModel holding a boolean and have it being
changed by the validation calls on my model?

At this point in time yes.  There's some thoughts at this kind of thing at

https://wave.google.com/wave/waveref/googlewave.com/w+vIXX8JY-A  so if you think of anything else you'd need feel free to add a blip.

 
Cheers