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README.md

Ooui

Ooui is a small cross-platform UI library for .NET that uses web technologies.

It presents a classic object-oriented UI API that controls a dumb web view or browser. With Ooui, you get the full power of your favorite .NET programming language plus the ability to interact with your app using any device with a web browser.

Quick Example

using Ooui;

// Create the UI
var button = new Button($"Click me!");

// Add some logic to it
var count = 0;
button.Clicked += (s, e) => {
    count++;
    button.Text = $"Clicked {count} times";
};

// Publishing makes an object available at a given URL
// The user should be directed to http://localhost:8080/button
UI.Publish("/button", button);

In this example, all users would be interacting with the same button. That's right, automatic collaboration!

If you want each user to get their own button, then you will Publish a function to create it:

Button MakeButton() {
    var button = new Button($"Click me!");
    var count = 0;
    button.Clicked += (s, e) => {
        count++;
        button.Text = $"Clicked {count} times";
    };
    return button;
}

UI.Publish("/button", MakeButton);

How it works

When the user requests a page, Ooui will connect to the client using a Web Socket. This socket is used to keep an in-memory model of the UI (the one you work with as a programmer) in sync with the actual UI shown to the user in their browser.

When the user clicks or otherwise interacts, those events are sent back over the web socket so that your code can deal with them.

Comparison

UI LibraryOouiXamarin.FormsASP.NET MVC
How big is it? 50 KB 2,000 KB 5,000 KB
Where does it run? Everywhere iOS, Android, Mac, Windows Windows, Linux, Mac
How do I make a button?
new Button()
new Button()
<button />
Does it use native controls? No, HTML5 controls Yes! HTML5 controls
What controls are available? All of those in HTML5 Xamarin.Forms controls All of those in HTML5
Which architecture will you force me to use? None, you're free MVVM MVC/MVVM
What's the templating language? C# XAML Razor
How do I style things? CSS baby! XAML resources CSS
Is there databinding? No :-( Yes! Debatable
Do I need to run a server? Nope Heck no Yes
Is it web scale? How much money do you have? What's the web? Sure