Ooui-tws-port/README.md

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# Ooui
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[![Build Status](https://www.bitrise.io/app/86585e168136767d/status.svg?token=G9Svvnv_NvG40gcqu48RNQ)](https://www.bitrise.io/app/86585e168136767d) [![NuGet Package](https://img.shields.io/nuget/v/Ooui.svg)](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.
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 the Samples
```bash
git clone git@github.com:praeclarum/Ooui.git
cd Ooui
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dotnet restore
dotnet run --project Samples/Samples.csproj
```
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Now point your browser at [http://localhost:8080/shared-button](http://localhost:8080/shared-button)
You should see a button that tracks the number of times it was clicked.
The source code for that button is shown in the example below.
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## Example
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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
{
static void Main(string[] args)
{
// 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 ("/shared-button", button);
// Don't exit the app until someone hits return
Console.ReadLine ();
}
}
```
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Make sure to add a reference to Ooui before you try running!
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```bash
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()
{
var button = new Button("Click me!");
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var count = 0;
button.Clicked += (s, e) => {
count++;
button.Text = $"Clicked {count} times";
};
return button;
}
UI.Publish("/button", MakeButton);
```
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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
<table>
<thead><tr><th>UI Library</th><th>Ooui</th><th>Xamarin.Forms</th><th>ASP.NET MVC</th></tr></thead>
<tr>
<th>How big is it?</th>
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<td>25 KB</td>
<td>650 KB</td>
<td>1,300 KB</td>
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</tr>
<tr>
<th>Where does it run?</th>
<td>Everywhere</td>
<td>iOS, Android, Mac, Windows</td>
<td>Windows, Linux, Mac</td>
</tr>
<tr>
<th>How do I make a button?</th>
<td><pre>new Button()</pre></td>
<td><pre>new Button()</pre></td>
<td><pre>&lt;button /&gt;</pre></td>
</tr>
<tr>
<th>Does it use native controls?</th>
<td>No, HTML5 controls</td>
<td>Yes!</td>
<td>HTML5 controls</td>
</tr>
<tr>
<th>What controls are available?</th>
<td>All of those in HTML5</td>
<td>Xamarin.Forms controls</td>
<td>All of those in HTML5</td>
</tr>
<tr>
<th>Which architecture will you force me to use?</th>
<td>None, you're free</td>
<td>MVVM</td>
<td>MVC/MVVM</td>
</tr>
<tr>
<th>What's the templating language?</th>
<td>C#</td>
<td>XAML</td>
<td>Razor</td>
</tr>
<tr>
<th>How do I style things?</th>
<td>CSS baby!</td>
<td>XAML resources</td>
<td>CSS</td>
</tr>
<tr>
<th>Is there databinding?</th>
<td>No :-(</td>
<td>Yes!</td>
<td>Debatable</td>
</tr>
<tr>
<th>Do I need to run a server?</th>
<td>Nope</td>
<td>Heck no</td>
<td>Yes</td>
</tr>
<tr>
<th>Is it web scale?</th>
<td>How much money do you have?</td>
<td>What's the web?</td>
<td>Sure</td>
</tr>
</table>