DisabledIf widget

[xarvic]

Adds a widget wrapper that disables the inner widget if the provided closure returns true.
For the moment the only effect is that the text boxes annotated with "(disabled)" can't be focused by pressing Tab. The visual changes and changes in behavior are implemented on the widgets themselves in a following PR.

[cmyr]

Looks good. A few little notes and doc fixups, but nothing major!

[cmyr]

Looks good!

[cmyr]

@xarvic I've invited you as a collaborator on this repo; you should feel free to merge your own PRs when they're approved and you're happy with them, and feel free to approve other PRs when you feel confident about the changes. :)

[xarvic]

Thanks :) How can I accept? I have not received an e-mail or a notification on Github

[arifd]

So I'm playing around with cargo run --example disabled. Looks like this is not working. Nothing changes whether or not I click on the disabled checkbox.

[SecondFlight]

Same here. I'm on Windows 10 with the latest Druid@master.

[cmyr]

I suspect that's because we need to land #1717, which implements the style changes.

[SecondFlight]

Works with #1717 👍

[arifd]

Sorry for my git-ignorance, but I'm pulling in: druid = { git = "https://github.com/linebender/druid.git", features = ["im", "image", "png"] } in my Cargo.toml.

Since it looks like #1717 has been merged, do I just have to cargo clean && cargo build and i'll get the benefit of #1717 or is there something more to do?

[SecondFlight]

cargo update is probably what you're looking for. My understanding is that cargo will lock unspecified git repos to a specific commit (stored in cargo.lock), and cargo update will bump it to the latest commit.

[arifd]

Aha! That did it. Thanks! :)