Fixes/cleanups to the Gtk/Cairo platforms

- Added PopupImpl support in Perspex.Gtk
- Added ShowDialog support to WindowImpl in Perspex.Gtk
- Fixed resize issues in Perspex.Gtk
- Renamed Centered to Center to match WPF in Cairo
- Removed old Serilog references breaking compile

Cairo/Perspex.Cairo/CairoExtensions.cs

@@ -76,7 +76,7 @@ namespace Perspex.Cairo
                 return Pango.Alignment.Left;
             }
 
-            if (alignment == Perspex.Media.TextAlignment.Centered)
+            if (alignment == Perspex.Media.TextAlignment.Center)
             {
                 return Pango.Alignment.Center;
             }

Gtk/Perspex.Gtk/GtkPlatform.cs

@@ -40,6 +40,7 @@ namespace Perspex.Gtk
         {
             var locator = Locator.CurrentMutable;
             locator.Register(() => new WindowImpl(), typeof(IWindowImpl));
+            locator.Register(() => new PopupImpl(), typeof(IPopupImpl));
             locator.Register(() => GtkKeyboardDevice.Instance, typeof(IKeyboardDevice));
             locator.Register(() => instance, typeof(IPlatformSettings));
             locator.Register(() => instance, typeof(IPlatformThreadingInterface));

Gtk/Perspex.Gtk/Perspex.Gtk.csproj

@@ -59,6 +59,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="GtkExtensions.cs" />
+    <Compile Include="PopupImpl.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="GtkPlatform.cs" />
     <Compile Include="WindowImpl.cs" />

Gtk/Perspex.Gtk/PopupImpl.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Perspex.Gtk
+{
+    using System;
+    using Perspex.Platform;
+    using global::Gtk;
+
+    public class PopupImpl : WindowImpl, IPopupImpl
+    {
+        public PopupImpl()
+            : base(WindowType.Popup)
+        {
+            this.DefaultSize = new Gdk.Size(640, 480);
+            this.Events = Gdk.EventMask.PointerMotionMask |
+                          Gdk.EventMask.ButtonPressMask |
+                          Gdk.EventMask.ButtonReleaseMask;
+        }
+
+        public void SetPosition(Point p)
+        {
+            this.Move((int)p.X, (int)p.Y);
+        }
+    }
+}

Gtk/Perspex.Gtk/WindowImpl.cs

@@ -12,6 +12,7 @@ namespace Perspex.Gtk
     using Perspex.Input.Raw;
     using Perspex.Platform;
     using Gtk = global::Gtk;
+    using System.Reactive.Disposables;
 
     public class WindowImpl : Gtk.Window, IWindowImpl
     {
@@ -31,10 +32,20 @@ namespace Perspex.Gtk
             this.windowHandle = new PlatformHandle(this.Handle, "GtkWindow");
         }
 
+        public WindowImpl(Gtk.WindowType type)
+            : base(type)
+        {
+            this.DefaultSize = new Gdk.Size(640, 480);
+            this.Events = Gdk.EventMask.PointerMotionMask |
+                          Gdk.EventMask.ButtonPressMask |
+                          Gdk.EventMask.ButtonReleaseMask;
+            this.windowHandle = new PlatformHandle(this.Handle, "GtkWindow");
+        }
+
         public Size ClientSize
         {
-            get { return this.clientSize; }
-            set { this.Resize((int)value.Width, (int)value.Height); }
+            get;
+            set;
         }
 
         IPlatformHandle ITopLevelImpl.Handle
@@ -56,12 +67,14 @@ namespace Perspex.Gtk
 
         public IPopupImpl CreatePopup()
         {
-            throw new NotImplementedException();
+            return new PopupImpl();
         }
 
         public void Invalidate(Rect rect)
         {
-            this.QueueDraw();
+#pragma warning disable CS0612 // Type or member is obsolete
+            this.Draw(new Gdk.Rectangle { X = (int)rect.X, Y = (int)rect.Y, Width = (int)rect.Width, Height = (int)rect.Height });
+#pragma warning restore CS0612 // Type or member is obsolete
         }
 
         public Point PointToScreen(Point point)
@@ -82,7 +95,10 @@ namespace Perspex.Gtk
 
         public IDisposable ShowDialog()
         {
-            throw new NotImplementedException();
+            this.Modal = true;
+            this.Show();
+
+            return Disposable.Empty;
         }
 
         void ITopLevelImpl.Activate()
@@ -120,8 +136,7 @@ namespace Perspex.Gtk
 
             if (newSize != this.clientSize)
             {
-                this.clientSize = newSize;
-                this.Resized(this.clientSize);
+                this.Resized(newSize);
             }
 
             return true;

TestApplication/Program.cs

@@ -17,9 +17,6 @@ using Perspex.Gtk;
 #endif
 using ReactiveUI;
 using Splat;
-using Serilog;
-using Serilog.Filters;
-using Serilog.Events;
 
 namespace TestApplication
 {