[Feature Request]: Expose IQuickOpenService as public api

[balajikris]

• VSCode Version: 1.10.0
• OS Version: win10

Steps to Reproduce:

I'm trying to build an extension that presents a list of npm-packages in the command palette. As the user scrolls down the list, I would like to show a preview-html of the package's README in a virtual document (see screenshot). The existing InputOptions do not help me in accomplishing this. For now, I'm using showQuickPick but I don't think it exposes a callback for the event of user moving down the list.

This experience would be similar to how vscode accomplishes previewing a color theme when the user is browsing through the different available themes from the command palette. This code is what I think I need, but it is not part of the public api.

// Thanks to @hoovercj for helping me navigate through the source.

screenshot:

[hoovercj]

I would also like to take advantage of this api.

I have an extension for a language called octo and I bundle documentation and sample code with it. As the OP does, I use quick picks to expose those and it would be hugely beneficial if I could simultaneously show the content of docs or sample code in an editor as the user cycles through the options.

[jrieken]

closing this as dupe of https://github.com/Microsoft/vscode/issues?q=is%3Aopen+label%3Aapi+label%3Aquick-pick+label%3Afeature-request

[hoovercj]

@balajikris you and I both missed something obvious. oops!

QuickPickOptions takes an onDidSelectItem callback that does what we both need.

I connected it with a TextDocumentContentProvider in a sample extension here which I'll be folding into my real extensions after this fix comes out with the next release.

I hope that helps!

[balajikris]

@hoovercj ah! I see. I noticed that event but got confused as to what selection meant - cycling through with arrow keys or commiting one by hitting Enter. Thanks for looking into this -- your api-playground idea is awesome, I'll take a peek. Thanks much!