two way binding with ui library controls

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David Jazbec 20 posts 142 karma points

Jan 20, 2024 @ 23:40

0

Two way binding with UI Library controls

Hello everyone,

I am developing a simple Umbraco extension and I want users to be able to change some settings via a custom dashboard.

I have created a dashboard using the Umbraco UI library controls (<uui-***>).

Now displaying the values is no problem, but I am stuck on binding them so that any changes are reflected back to the AngularJS controller (two way binding).

The ng-model directive does not work as it does on a simple <input> element.

Im not sure how I should go about this. Are there any good examples of mixing the UI library with AngularJS?

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Markus Johansson 1936 posts 5864 karma points MVP 2x c-trib

Jan 21, 2024 @ 14:46

0

Hi!

Sounds like a good idea to base new extensions for the current Umbraco-version on Lit to make the migration to Umbraco 14 easier.

As far as I know you probably have two options:

1. Use component hand subscribe to events from the component to “manually” update you model.

If you component fire a “change” event you should be able to handle it with ng-change=“”.

2. Build your own directives to provide the 2-way data binding (much like what the ng-model does). I think that this is probably overkill if you don’t use it in a lot of places.

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David Jazbec 20 posts 142 karma points

Jan 21, 2024 @ 22:19

Yes, it seemed like a good idea to check out the UI library before Umbraco 14 arrives.

I have tested a few things with ng- directives but it does not work all the time or with all lit components. I ended up with this, which is what you suggested...

$scope.toggle = function (propName){
    let currentValue = vm.settings[propName];
    vm.settings[propName] = !currentValue;
};

And then calling the function....

    <uui-toggle label="Keep original images" label-position="left" 
                onchange="angular.element(this).scope().toggle('WpaKeepOriginals')" 
                ng-attr-checked="{{vm.settings.WpaKeepOriginals ? 'checked' : undefined}}">
    </uui-toggle>

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Markus Johansson 1936 posts 5864 karma points MVP 2x c-trib

Jan 22, 2024 @ 10:36

1

Hi David!

Thanks for sharing!

I think this is more or less what you need to do. You could probably use a method to handle the event to avoid the angular.element(this)-part but as long at it works - it works =D

// Markus

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Bjarne Fyrstenborg 1282 posts 3994 karma points MVP 8x c-trib

Jan 22, 2024 @ 13:57
100
Hi David

Have you tried something like this?
```
<uui-toggle
    ng-on-change="vm.toggle()"
    ng-attr-checked="{{vm.settings.WpaKeepOriginals ? 'checked' : undefined}}">
</uui-toggle>
```
where vm refer to this in controller.
```
const vm = this;

vm.toggle = function (){
    ...
};
```
The events in UI library need to be prefixed with ng-on- in Angular, so:
- @click -> ng-on-click
- @change -> ng-on-change
etc.
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David Jazbec 20 posts 142 karma points

Jan 22, 2024 @ 21:50

0

Hi Bjarne,

I have now, since you mentioned it :)

Works like a charm, I will stick with it, it looks much better.

Thanks guys!

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