Make TextBox work (a bit).

Cairo/Perspex.Cairo/Media/TextService.cs

@@ -49,15 +49,20 @@ namespace Perspex.Cairo.Media
             var layout = this.CreateLayout(text);
             int result;
             int trailing;
-            layout.XyToIndex((int)point.X, (int)point.Y, out result, out trailing);
-            return result;
+            return layout.XyToIndex(
+                Pango.Units.FromDouble(point.X), 
+                Pango.Units.FromDouble(point.Y), 
+                out result, 
+                out trailing) ? result : text.Text.Length;
         }
 
         public Point GetCaretPosition(FormattedText text, int caretIndex, Size constraint)
         {
+            // TODO: Rather than have this and GetLineHeights, might be best to just return 
+            // the rect if that's also possible in Direct2D backend.
             var layout = this.CreateLayout(text);
             var rect = layout.IndexToPos(caretIndex);
-            return new Point(rect.X, rect.Y);
+            return new Point(Pango.Units.ToDouble(rect.X), Pango.Units.ToDouble(rect.Y));
         }
 
         public double[] GetLineHeights(FormattedText text, Size constraint)

Gtk/Perspex.Gtk/GtkPlatform.cs

@@ -8,6 +8,7 @@ namespace Perspex.Gtk
 {
 	using System;
 	using System.Reactive.Disposables;
+    using Perspex.Input;
 	using Perspex.Platform;
 	using Splat;
 	using Gtk = global::Gtk;
@@ -25,7 +26,7 @@ namespace Perspex.Gtk
 		{
 			var locator = Locator.CurrentMutable;
             locator.Register(() => new WindowImpl(), typeof(IWindowImpl));
-            //locator.Register(() => WindowsKeyboardDevice.Instance, typeof(IKeyboardDevice));
+            locator.Register(() => GtkKeyboardDevice.Instance, typeof(IKeyboardDevice));
             locator.Register(() => instance, typeof(IPlatformThreadingInterface));
 		}
 

Gtk/Perspex.Gtk/Input/GtkKeyboardDevice.cs

@@ -3,8 +3,10 @@
 // Copyright 2014 MIT Licence. See licence.md for more information.
 // </copyright>
 // -----------------------------------------------------------------------
+
 namespace Perspex.Gtk
 {
+    using System;
     using Perspex.Input;
 
     public class GtkKeyboardDevice : KeyboardDevice
@@ -32,7 +34,25 @@ namespace Perspex.Gtk
 
         public static Perspex.Input.Key ConvertKey(Gdk.Key key)
         {
-            return Key.X;
+            // TODO: Don't use reflection for this! My eyes!!!
+            if (key == Gdk.Key.BackSpace)
+            {
+                return Perspex.Input.Key.Back;
+            }
+            else
+            {
+                var s = Enum.GetName(typeof(Gdk.Key), key);
+                Perspex.Input.Key result;
+
+                if (Enum.TryParse(s, true, out result))
+                {
+                    return result;
+                }
+                else
+                {
+                    return Perspex.Input.Key.None;
+                }
+            }
         }
     }
 }

Gtk/Perspex.Gtk/WindowImpl.cs

@@ -111,7 +111,7 @@ namespace Perspex.Gtk
                 GtkKeyboardDevice.Instance,
                 RawKeyEventType.KeyDown,
                 GtkKeyboardDevice.ConvertKey(evnt.Key),
-                "X");
+                new string((char)Gdk.Keyval.ToUnicode((uint)evnt.Key), 1));
             this.Input(e);
             return true;
         }

Perspex.Controls/TextBoxView.cs

@@ -1,126 +1,126 @@
-// -----------------------------------------------------------------------
-// <copyright file="TextBoxView.cs" company="Steven Kirk">
-// Copyright 2013 MIT Licence. See licence.md for more information.
-// </copyright>
-// -----------------------------------------------------------------------
-
-namespace Perspex.Controls
-{
-    using System;
-    using Perspex.Media;
-    using Perspex.Platform;
-    using Perspex.Threading;
-    using Splat;
-
-    internal class TextBoxView : Control
-    {
-        private TextBox parent;
-
-        private FormattedText formattedText;
-
-        private DispatcherTimer caretTimer;
-
-        private bool caretBlink;
-
-        public TextBoxView(TextBox parent)
-        {
-            this.caretTimer = new DispatcherTimer();
-            this.caretTimer.Interval = TimeSpan.FromMilliseconds(500);
-            this.caretTimer.Tick += this.CaretTimerTick;
-            this.parent = parent;
-        }
-
-        public FormattedText FormattedText
-        {
-            get
-            {
-                if (this.formattedText == null)
-                {
-                    this.formattedText = this.CreateFormattedText();
-                }
-
-                return this.formattedText;
-            }
-        }
-
-        public new void GotFocus()
-        {
-            this.caretBlink = true;
-            this.caretTimer.Start();
-        }
-
-        public new void LostFocus()
-        {
-            this.caretTimer.Stop();
-            this.InvalidateVisual();
-        }
-
-        public void InvalidateText()
-        {
-            this.formattedText = null;
-            this.InvalidateMeasure();
-        }
-
-        internal void CaretMoved()
-        {
-            this.caretBlink = true;
-            this.caretTimer.Stop();
-            this.caretTimer.Start();
-            this.InvalidateVisual();
-        }
-
-        public override void Render(IDrawingContext context)
-        {
-            Rect rect = new Rect(this.ActualSize);
-
-            context.DrawText(Brushes.Black, rect, this.FormattedText);
-
-            if (this.parent.IsFocused)
-            {
-                ITextService textService = Locator.Current.GetService<ITextService>();
-                Point caretPos = textService.GetCaretPosition(
-                    this.formattedText, 
-                    this.parent.CaretIndex,
-                    this.ActualSize);
-                double[] lineHeights = textService.GetLineHeights(this.formattedText, this.ActualSize);
-                Brush caretBrush = Brushes.Black;
-
-                if (this.caretBlink)
-                {
-                    context.DrawLine(
-                        new Pen(caretBrush, 1),
-                        caretPos,
-                        new Point(caretPos.X, caretPos.Y + lineHeights[0]));
-                }
-            }
-        }
-
-        protected override Size MeasureOverride(Size constraint)
-        {
-            if (!string.IsNullOrEmpty(this.parent.Text))
-            {
-                ITextService textService = Locator.Current.GetService<ITextService>();
-                return textService.Measure(this.FormattedText, constraint);
-            }
-
-            return new Size();
-        }
-
-        private FormattedText CreateFormattedText()
-        {
-            return new FormattedText
-            {
-                FontFamilyName = "Segoe UI",
-                FontSize = this.GetValue(TextBlock.FontSizeProperty),
-                FontStyle = this.GetValue(TextBlock.FontStyleProperty),
-                Text = this.parent.Text,
-            };
-        }
-
-        private void CaretTimerTick(object sender, EventArgs e)
-        {
-            this.caretBlink = !this.caretBlink;
-            this.InvalidateVisual();
-        }
-    }
-}
+// -----------------------------------------------------------------------
+// <copyright file="TextBoxView.cs" company="Steven Kirk">
+// Copyright 2013 MIT Licence. See licence.md for more information.
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace Perspex.Controls
+{
+    using System;
+    using Perspex.Media;
+    using Perspex.Platform;
+    using Perspex.Threading;
+    using Splat;
+
+    internal class TextBoxView : Control
+    {
+        private TextBox parent;
+
+        private FormattedText formattedText;
+
+        private DispatcherTimer caretTimer;
+
+        private bool caretBlink;
+
+        public TextBoxView(TextBox parent)
+        {
+            this.caretTimer = new DispatcherTimer();
+            this.caretTimer.Interval = TimeSpan.FromMilliseconds(500);
+            this.caretTimer.Tick += this.CaretTimerTick;
+            this.parent = parent;
+        }
+
+        public FormattedText FormattedText
+        {
+            get
+            {
+                if (this.formattedText == null)
+                {
+                    this.formattedText = this.CreateFormattedText();
+                }
+
+                return this.formattedText;
+            }
+        }
+
+        public new void GotFocus()
+        {
+            this.caretBlink = true;
+            this.caretTimer.Start();
+        }
+
+        public new void LostFocus()
+        {
+            this.caretTimer.Stop();
+            this.InvalidateVisual();
+        }
+
+        public void InvalidateText()
+        {
+            this.formattedText = null;
+            this.InvalidateMeasure();
+        }
+
+        internal void CaretMoved()
+        {
+            this.caretBlink = true;
+            this.caretTimer.Stop();
+            this.caretTimer.Start();
+            this.InvalidateVisual();
+        }
+
+        public override void Render(IDrawingContext context)
+        {
+            Rect rect = new Rect(this.ActualSize);
+
+            context.DrawText(Brushes.Black, rect, this.FormattedText);
+
+            if (this.parent.IsFocused)
+            {
+                ITextService textService = Locator.Current.GetService<ITextService>();
+                Point caretPos = textService.GetCaretPosition(
+                    this.formattedText, 
+                    this.parent.CaretIndex,
+                    this.ActualSize);
+                double[] lineHeights = textService.GetLineHeights(this.formattedText, this.ActualSize);
+                Brush caretBrush = Brushes.Black;
+
+                if (this.caretBlink)
+                {
+                    context.DrawLine(
+                        new Pen(caretBrush, 1),
+                        caretPos,
+                        new Point(caretPos.X, caretPos.Y + lineHeights[0]));
+                }
+            }
+        }
+
+        protected override Size MeasureOverride(Size constraint)
+        {
+            if (!string.IsNullOrEmpty(this.parent.Text))
+            {
+                ITextService textService = Locator.Current.GetService<ITextService>();
+                return textService.Measure(this.FormattedText, constraint);
+            }
+
+            return new Size();
+        }
+
+        private FormattedText CreateFormattedText()
+        {
+            return new FormattedText
+            {
+                FontFamilyName = "Segoe UI",
+                FontSize = this.GetValue(TextBlock.FontSizeProperty),
+                FontStyle = this.GetValue(TextBlock.FontStyleProperty),
+                Text = this.parent.Text,
+            };
+        }
+
+        private void CaretTimerTick(object sender, EventArgs e)
+        {
+            this.caretBlink = !this.caretBlink;
+            this.InvalidateVisual();
+        }
+    }
+}

Perspex.SceneGraph/Platform/ITextService.cs

@@ -1,21 +1,21 @@
-// -----------------------------------------------------------------------
-// <copyright file="ITextService.cs" company="Steven Kirk">
-// Copyright 2014 MIT Licence. See licence.md for more information.
-// </copyright>
-// -----------------------------------------------------------------------
-
-namespace Perspex.Platform
-{
-    using Perspex.Media;
-
-    public interface ITextService
-    {
-        int GetCaretIndex(FormattedText text, Point point, Size constraint);
-
-        Point GetCaretPosition(FormattedText text, int caretIndex, Size constraint);
-
-        double[] GetLineHeights(FormattedText text, Size constraint);
-
-        Size Measure(FormattedText text, Size constraint);
-    }
-}
+// -----------------------------------------------------------------------
+// <copyright file="ITextService.cs" company="Steven Kirk">
+// Copyright 2014 MIT Licence. See licence.md for more information.
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace Perspex.Platform
+{
+    using Perspex.Media;
+
+    public interface ITextService
+    {
+        int GetCaretIndex(FormattedText text, Point point, Size constraint);
+
+        Point GetCaretPosition(FormattedText text, int caretIndex, Size constraint);
+
+        double[] GetLineHeights(FormattedText text, Size constraint);
+
+        Size Measure(FormattedText text, Size constraint);
+    }
+}