[Closed] Behaviors extension to VisualElementExtensions

[bijington]

I would like to propose that we add a WithBehavior(this VisualElement visualElement, Behavior behavior) extension that will add the supplied behavior to visualElement.Behaviors.

It would then allow us to simplify this:

var entry = new Entry
{
    Placeholder = "Start typing until MaxLength is reached...",
    MaxLength = 100
};

entry.Behaviors.Add(
    new MaxLengthReachedBehavior().Bind(
        MaxLengthReachedBehavior.CommandProperty,
        nameof(ViewModel.MaxLengthReachedCommand)));

Content = entry;

down to this:

Content = new Entry
{
    Placeholder = "Start typing until MaxLength is reached...",
    MaxLength = 100
}.WithBehavior(new MaxLengthReachedBehavior().Bind(
        MaxLengthReachedBehavior.CommandProperty,
        nameof(ViewModel.MaxLengthReachedCommand));

Or better yet as @pictos has suggested we could make the method accept params and the developer could hook up multiple behaviors (e.g. WithBehaviors(params Behavior[] behaviors))

[pictos]

We can have both, that way if the dev just wants to add one behavior they will not pay for the array allocation.

[brminnick]

Thanks Shaun + Pedro! I think this is ready to be promoted to a Proposal!

[bijington]

Done: #29

[CliffAgius]

Closed and answered