186 lines
4.3 KiB
Markdown
186 lines
4.3 KiB
Markdown
# Ooui
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[](https://www.bitrise.io/app/86585e168136767d) [](https://www.nuget.org/packages/Ooui)
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Ooui (pronounced *weeee!*) is a small cross-platform UI library for .NET that uses web technologies.
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It presents a classic object-oriented UI API that controls a dumb 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.
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## Try it Online
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Head on over to [http://ooui.mecha.parts:8080/shared-button](http://ooui.mecha.parts:8080/shared-button) and give it a click!
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## Try the Samples Locally
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```bash
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git clone git@github.com:praeclarum/Ooui.git
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cd Ooui
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dotnet restore
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dotnet run --project Samples/Samples.csproj
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```
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Now point your browser at [http://localhost:8080/shared-button](http://localhost:8080/shared-button)
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You should see a button that tracks the number of times it was clicked.
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The source code for that button is shown in the example below.
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## Example Use
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Here is the complete source code to a fully collaborative button clicking app.
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```csharp
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using System;
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using Ooui;
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class Program
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{
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static void Main(string[] args)
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{
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// Create the UI
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var button = new Button("Click me!");
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// Add some logic to it
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var count = 0;
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button.Clicked += (s, e) => {
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count++;
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button.Text = $"Clicked {count} times";
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};
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// Publishing makes an object available at a given URL
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// The user should be directed to http://localhost:8080/button
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UI.Publish ("/shared-button", button);
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// Don't exit the app until someone hits return
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Console.ReadLine ();
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}
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}
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```
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Make sure to add a reference to Ooui before you try running!
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```bash
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dotnet add package Ooui
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```
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With just that code, the user will be presented with a silly counting button.
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In fact, any number of users can hit that URL and start interacting with the same button. That's right, automatic collaboration!
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If you want each user to get their own button, then you will instead `Publish` a **function** to create it:
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```csharp
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Button MakeButton()
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{
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var button = new Button("Click me!");
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var count = 0;
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button.Clicked += (s, e) => {
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count++;
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button.Text = $"Clicked {count} times";
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};
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return button;
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}
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UI.Publish("/button", MakeButton);
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```
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Now every user (well, every load of the page) will get their own button.
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## How it works
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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. This is done using a simple messaging protocol with JSON packets.
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When the user clicks or otherwise interacts with the UI, those events are sent back over the web socket so that your code can deal with them.
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## Comparison
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<table>
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<thead><tr><th>UI Library</th><th>Ooui</th><th>Xamarin.Forms</th><th>ASP.NET MVC</th></tr></thead>
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<tr>
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<th>How big is it?</th>
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<td>50 KB</td>
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<td>650 KB</td>
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<td>1,300 KB</td>
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</tr>
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<tr>
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<th>Where does it run?</th>
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<td>Everywhere</td>
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<td>iOS, Android, Mac, Windows</td>
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<td>Everywhere</td>
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</tr>
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<tr>
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<th>How do I make a button?</th>
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<td><pre>new Button()</pre></td>
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<td><pre>new Button()</pre></td>
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<td><pre><button /></pre></td>
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</tr>
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<tr>
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<th>Does it use native controls?</th>
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<td>No, HTML5 controls</td>
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<td>Yes!</td>
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<td>HTML5 controls</td>
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</tr>
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<tr>
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<th>What controls are available?</th>
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<td>All of those in HTML5</td>
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<td>Xamarin.Forms controls</td>
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<td>All of those in HTML5</td>
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</tr>
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<tr>
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<th>Which architecture will you force me to use?</th>
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<td>None, you're free</td>
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<td>MVVM</td>
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<td>MVC/MVVM</td>
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</tr>
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<tr>
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<th>What's the templating language?</th>
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<td>C#</td>
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<td>XAML</td>
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<td>Razor</td>
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</tr>
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<tr>
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<th>How do I style things?</th>
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<td>CSS baby! (soon)</td>
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<td>XAML resources</td>
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<td>CSS</td>
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</tr>
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<tr>
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<th>Is there databinding?</th>
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<td>No :-(</td>
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<td>Yes!</td>
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<td>Debatable</td>
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</tr>
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<tr>
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<th>Do I need to run a server?</th>
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<td>Nope</td>
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<td>Heck no</td>
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<td>Yes</td>
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</tr>
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<tr>
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<th>Is it web scale?</th>
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<td>Yes?</td>
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<td>What's the web?</td>
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<td>Yes!</td>
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</tr>
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</table>
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