Add Draw sample

Samples/DrawSample.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Ooui;
+
+namespace Samples
+{
+    public class DrawSample
+    {
+        public void Publish ()
+        {
+            var heading = new Heading ("Draw");
+            var subtitle = new Paragraph ("Click to draw a collaborative masterpiece");
+            var canvas = new Canvas {
+                Width = 320,
+                Height = 240,
+            };
+            var context = canvas.GetContext2D ();
+
+            canvas.Clicked += (s, e) => {
+                context.BeginPath ();
+                context.Rect (e.OffsetX - 5, e.OffsetY - 5, 10, 10);
+                context.Fill ();
+            };
+            canvas.Style.Cursor = "pointer";
+            canvas.Style.BorderColor = "#CCC";
+            canvas.Style.BorderStyle = "solid";
+            canvas.Style.BorderWidth = "1px";
+
+            var clearbtn = new Button ("Clear") {
+                Type = ButtonType.Submit,
+                ClassName = "btn btn-danger",
+            };
+            clearbtn.Clicked += (s, e) => {
+                context.ClearRect (0, 0, canvas.Width, canvas.Height);
+            };
+            clearbtn.Style.Display = "block";
+
+            var app = new Div ();
+            app.AppendChild (heading);
+            app.AppendChild (subtitle);
+            app.AppendChild (canvas);
+            app.AppendChild (clearbtn);
+            UI.Publish ("/draw", app);
+        }
+    }
+}
+
+

Samples/Program.cs

@@ -25,8 +25,9 @@ namespace Samples
 
             new ButtonSample ().Publish ();
             new TodoSample ().Publish ();
+            new DrawSample ().Publish ();
 
-            UI.Present ("/todo");
+            UI.Present ("/draw");
 
             Console.ReadLine ();
         }