Implemented icons for the Win32 and GTK.

src/Avalonia.Controls/Avalonia.Controls.csproj

@@ -56,6 +56,8 @@
     <Compile Include="HotkeyManager.cs" />
     <Compile Include="IApplicationLifecycle.cs" />
     <Compile Include="IScrollable.cs" />
+    <Compile Include="Icon.cs" />
+    <Compile Include="INameScope.cs" />
     <Compile Include="IPseudoClasses.cs" />
     <Compile Include="DropDownItem.cs" />
     <Compile Include="ISetInheritanceParent.cs" />
@@ -64,6 +66,11 @@
     <Compile Include="IVirtualizingPanel.cs" />
     <Compile Include="LayoutTransformControl.cs" />
     <Compile Include="Mixins\ContentControlMixin.cs" />
+    <Compile Include="NameScope.cs" />
+    <Compile Include="NameScopeEventArgs.cs" />
+    <Compile Include="NameScopeExtensions.cs" />
+    <Compile Include="Platform\IIconImpl.cs" />
+    <Compile Include="Platform\IPlatformIconLoader.cs" />
     <Compile Include="Platform\ITopLevelRenderer.cs" />
     <Compile Include="Platform\IWindowingPlatform.cs" />
     <Compile Include="Platform\PlatformManager.cs" />

src/Avalonia.Controls/Icon.cs

@@ -0,0 +1,28 @@
+using Avalonia.Platform;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Avalonia.Controls
+{
+    /// <summary>
+    /// Represents an icon for a window.
+    /// </summary>
+    public class Icon
+    {
+        public Icon(string fileName)
+        {
+            PlatformImpl = AvaloniaLocator.Current.GetService<IPlatformIconLoader>().LoadIcon(fileName);
+        }
+
+        public Icon(Stream stream)
+        {
+            PlatformImpl = AvaloniaLocator.Current.GetService<IPlatformIconLoader>().LoadIcon(stream);
+        }
+
+        public IIconImpl PlatformImpl { get; }
+    }
+}

src/Avalonia.Controls/Platform/IIconImpl.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Avalonia.Platform
+{
+    public interface IIconImpl
+    {
+    }
+}

src/Avalonia.Controls/Platform/IPlatformIconLoader.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Avalonia.Platform
+{
+    public interface IPlatformIconLoader
+    {
+        IIconImpl LoadIcon(string fileName);
+        IIconImpl LoadIcon(Stream stream);
+    }
+}

src/Avalonia.Controls/Platform/IWindowImpl.cs

@@ -39,5 +39,10 @@ namespace Avalonia.Platform
         /// Enables of disables system window decorations (title bar, buttons, etc)
         /// </summary>
         void SetSystemDecorations(bool enabled);
+
+        /// <summary>
+        /// Sets the icon of this window.
+        /// </summary>
+        void SetIcon(IIconImpl icon);
     }
 }

src/Gtk/Avalonia.Gtk/Avalonia.Gtk.csproj

@@ -46,6 +46,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="ClipboardImpl.cs" />
+    <Compile Include="IconImpl.cs" />
     <Compile Include="SystemDialogImpl.cs" />
     <Compile Include="CursorFactory.cs" />
     <Compile Include="GtkExtensions.cs" />

src/Gtk/Avalonia.Gtk/GtkPlatform.cs

@@ -25,9 +25,10 @@ namespace Avalonia
 
 namespace Avalonia.Gtk
 {
+    using System.IO;
     using Gtk = global::Gtk;
 
-    public class GtkPlatform : IPlatformThreadingInterface, IPlatformSettings, IWindowingPlatform
+    public class GtkPlatform : IPlatformThreadingInterface, IPlatformSettings, IWindowingPlatform, IPlatformIconLoader
     {
         private static readonly GtkPlatform s_instance = new GtkPlatform();
         private static Thread _uiThread;
@@ -53,7 +54,8 @@ namespace Avalonia.Gtk
                 .Bind<IMouseDevice>().ToConstant(GtkMouseDevice.Instance)
                 .Bind<IPlatformSettings>().ToConstant(s_instance)
                 .Bind<IPlatformThreadingInterface>().ToConstant(s_instance)
-                .Bind<ISystemDialogImpl>().ToSingleton<SystemDialogImpl>();
+                .Bind<ISystemDialogImpl>().ToSingleton<SystemDialogImpl>()
+                .Bind<IPlatformIconLoader>().ToConstant(s_instance);
             SharedPlatform.Register();
             _uiThread = Thread.CurrentThread;
         }
@@ -112,5 +114,15 @@ namespace Avalonia.Gtk
         {
             return new PopupImpl();
         }
+
+        public IIconImpl LoadIcon(string fileName)
+        {
+            return new IconImpl(new Gdk.Pixbuf(fileName));
+        }
+
+        public IIconImpl LoadIcon(Stream stream)
+        {
+            return new IconImpl(new Gdk.Pixbuf(stream));
+        }
     }
 }

src/Gtk/Avalonia.Gtk/IconImpl.cs

@@ -0,0 +1,20 @@
+using Avalonia.Platform;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Gdk;
+
+namespace Avalonia.Gtk
+{
+    class IconImpl : IIconImpl
+    {
+        public IconImpl(Pixbuf pixbuf)
+        {
+            Pixbuf = pixbuf;
+        }
+
+        public Pixbuf Pixbuf { get; }
+    }
+}

src/Gtk/Avalonia.Gtk/WindowImpl.cs

@@ -53,11 +53,11 @@ namespace Avalonia.Gtk
             Realize();
         }
 
-		protected override void OnRealized ()
-		{
-			base.OnRealized ();
-			_imContext.ClientWindow = this.GdkWindow;
-		}
+        protected override void OnRealized ()
+        {
+            base.OnRealized ();
+            _imContext.ClientWindow = this.GdkWindow;
+        }
 
         public Size ClientSize
         {
@@ -383,5 +383,10 @@ namespace Avalonia.Gtk
             Input(e);
             return true;
         }
+
+        public void SetIcon(IIconImpl icon)
+        {
+            Icon = ((IconImpl)icon).Pixbuf;
+        }
     }
 }

src/Windows/Avalonia.Win32/Avalonia.Win32.csproj

@@ -43,6 +43,14 @@
     <Reference Include="System.Reactive.Core, Version=3.0.0.0, Culture=neutral, PublicKeyToken=94bc3704cddfc263, processorArchitecture=MSIL">
       <HintPath>..\..\..\packages\System.Reactive.Core.3.0.0\lib\net45\System.Reactive.Core.dll</HintPath>
       <Private>True</Private>
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Reactive.Core">
+      <HintPath>..\..\..\packages\Rx-Core.2.2.5\lib\net45\System.Reactive.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Reactive.Interfaces">
+      <HintPath>..\..\..\packages\Rx-Interfaces.2.2.5\lib\net45\System.Reactive.Interfaces.dll</HintPath>
     </Reference>
     <Reference Include="System.Reactive.Interfaces, Version=3.0.0.0, Culture=neutral, PublicKeyToken=94bc3704cddfc263, processorArchitecture=MSIL">
       <HintPath>..\..\..\packages\System.Reactive.Interfaces.3.0.0\lib\net45\System.Reactive.Interfaces.dll</HintPath>
@@ -56,6 +64,7 @@
       <Link>Properties\SharedAssemblyInfo.cs</Link>
     </Compile>
     <Compile Include="ClipboardImpl.cs" />
+    <Compile Include="IconImpl.cs" />
     <Compile Include="SystemDialogImpl.cs" />
     <Compile Include="CursorFactory.cs" />
     <Compile Include="Input\KeyInterop.cs" />

src/Windows/Avalonia.Win32/IconImpl.cs

@@ -0,0 +1,19 @@
+using Avalonia.Platform;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Avalonia.Win32
+{
+    class IconImpl : IIconImpl
+    {
+        public IconImpl(System.Drawing.Icon icon)
+        {
+            Icon = icon;
+        }
+
+        public System.Drawing.Icon Icon { get; }
+    }
+}

src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs

@@ -541,72 +541,72 @@ namespace Avalonia.Win32.Interop
             WM_DISPATCH_WORK_ITEM = WM_USER,
         }
 
-		public enum BitmapCompressionMode : uint
-		{
-			BI_RGB = 0,
-			BI_RLE8 = 1,
-			BI_RLE4 = 2,
-			BI_BITFIELDS = 3,
-			BI_JPEG = 4,
-			BI_PNG = 5
-		}
-
-		public enum DIBColorTable
-		{
-			DIB_RGB_COLORS = 0,     /* color table in RGBs */
-			DIB_PAL_COLORS          /* color table in palette indices */
-		};
-
-		[StructLayout(LayoutKind.Sequential)]
-		public struct RGBQUAD
-		{
-			public byte rgbBlue;
-			public byte rgbGreen;
-			public byte rgbRed;
-			public byte rgbReserved;
-		}
-
-		[StructLayout(LayoutKind.Sequential)]
-		public struct BITMAPINFO
-		{
-			// C# cannot inlay structs in structs so must expand directly here
-			//
-			//[StructLayout(LayoutKind.Sequential)]
-			//public struct BITMAPINFOHEADER
-			//{
-			public uint biSize;
-			public int biWidth;
-			public int biHeight;
-			public ushort biPlanes;
-			public ushort biBitCount;
-			public BitmapCompressionMode biCompression;
-			public uint biSizeImage;
-			public int biXPelsPerMeter;
-			public int biYPelsPerMeter;
-			public uint biClrUsed;
-			public uint biClrImportant;
-			//}
-
-			[MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
-			public uint[] cols;
-		}
-
-		public const int SizeOf_BITMAPINFOHEADER = 40;
-
-		[DllImport("user32.dll", SetLastError = true)]
-		public static extern IntPtr GetDC(IntPtr hWnd);
-
-		[DllImport("gdi32.dll")]
-		public static extern int SetDIBitsToDevice(IntPtr hdc, int XDest, int YDest,
-			uint dwWidth, uint dwHeight,
-			int XSrc, int YSrc,
-			uint uStartScan, uint cScanLines,
-		   IntPtr lpvBits, [In] ref BITMAPINFO lpbmi, uint fuColorUse);
-
-		[DllImport("user32.dll")]
-		public static extern bool ReleaseDC(IntPtr hWnd, IntPtr hDC);
-
-		[DllImport("user32.dll", SetLastError = true)]
+        public enum BitmapCompressionMode : uint
+        {
+            BI_RGB = 0,
+            BI_RLE8 = 1,
+            BI_RLE4 = 2,
+            BI_BITFIELDS = 3,
+            BI_JPEG = 4,
+            BI_PNG = 5
+        }
+
+        public enum DIBColorTable
+        {
+            DIB_RGB_COLORS = 0,     /* color table in RGBs */
+            DIB_PAL_COLORS          /* color table in palette indices */
+        };
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct RGBQUAD
+        {
+            public byte rgbBlue;
+            public byte rgbGreen;
+            public byte rgbRed;
+            public byte rgbReserved;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct BITMAPINFO
+        {
+            // C# cannot inlay structs in structs so must expand directly here
+            //
+            //[StructLayout(LayoutKind.Sequential)]
+            //public struct BITMAPINFOHEADER
+            //{
+            public uint biSize;
+            public int biWidth;
+            public int biHeight;
+            public ushort biPlanes;
+            public ushort biBitCount;
+            public BitmapCompressionMode biCompression;
+            public uint biSizeImage;
+            public int biXPelsPerMeter;
+            public int biYPelsPerMeter;
+            public uint biClrUsed;
+            public uint biClrImportant;
+            //}
+
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
+            public uint[] cols;
+        }
+
+        public const int SizeOf_BITMAPINFOHEADER = 40;
+
+        [DllImport("user32.dll", SetLastError = true)]
+        public static extern IntPtr GetDC(IntPtr hWnd);
+
+        [DllImport("gdi32.dll")]
+        public static extern int SetDIBitsToDevice(IntPtr hdc, int XDest, int YDest,
+            uint dwWidth, uint dwHeight,
+            int XSrc, int YSrc,
+            uint uStartScan, uint cScanLines,
+           IntPtr lpvBits, [In] ref BITMAPINFO lpbmi, uint fuColorUse);
+
+        [DllImport("user32.dll")]
+        public static extern bool ReleaseDC(IntPtr hWnd, IntPtr hDC);
+
+        [DllImport("user32.dll", SetLastError = true)]
         public static extern bool AdjustWindowRectEx(ref RECT lpRect, uint dwStyle, bool bMenu, uint dwExStyle);
 
         [DllImport("user32.dll")]
@@ -845,6 +845,10 @@ namespace Avalonia.Win32.Interop
         [DllImport("user32.dll")]
         public static extern IntPtr MonitorFromWindow(IntPtr hwnd, MONITOR dwFlags);
 
+        [return: MarshalAs(UnmanagedType.Bool)]
+        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+        static extern bool PostMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
+
         public enum MONITOR
         {
             MONITOR_DEFAULTTONULL = 0x00000000,
@@ -1008,6 +1012,12 @@ namespace Avalonia.Win32.Interop
             E_OUTOFMEMORY = 0x8007000E
         }
 
+        public enum Icons
+        {
+            ICON_SMALL = 0,
+            ICON_BIG = 1
+        }
+
         public const uint SIGDN_FILESYSPATH = 0x80058000;
 
         [Flags]

src/Windows/Avalonia.Win32/Win32Platform.cs

@@ -16,6 +16,7 @@ using Avalonia.Shared.PlatformSupport;
 using Avalonia.Win32.Input;
 using Avalonia.Win32.Interop;
 using Avalonia.Controls;
+using System.IO;
 
 namespace Avalonia
 {
@@ -31,7 +32,7 @@ namespace Avalonia
 
 namespace Avalonia.Win32
 {
-    public class Win32Platform : IPlatformThreadingInterface, IPlatformSettings, IWindowingPlatform
+    public class Win32Platform : IPlatformThreadingInterface, IPlatformSettings, IWindowingPlatform, IPlatformIconLoader
     {
         private static readonly Win32Platform s_instance = new Win32Platform();
         private static Thread _uiThread;
@@ -66,7 +67,8 @@ namespace Avalonia.Win32
                 .Bind<IPlatformSettings>().ToConstant(s_instance)
                 .Bind<IPlatformThreadingInterface>().ToConstant(s_instance)
                 .Bind<ISystemDialogImpl>().ToSingleton<SystemDialogImpl>()
-                .Bind<IWindowingPlatform>().ToConstant(s_instance);
+                .Bind<IWindowingPlatform>().ToConstant(s_instance)
+                .Bind<IPlatformIconLoader>().ToConstant(s_instance);
 
             SharedPlatform.Register();
             _uiThread = Thread.CurrentThread;
@@ -186,5 +188,17 @@ namespace Avalonia.Win32
         {
             return new PopupImpl();
         }
+
+        public IIconImpl LoadIcon(string fileName)
+        {
+            var icon = new System.Drawing.Icon(fileName);
+            return new IconImpl(icon);
+        }
+
+        public IIconImpl LoadIcon(Stream stream)
+        {
+            var icon = new System.Drawing.Icon(stream);
+            return new IconImpl(icon);
+        }
     }
 }

src/Windows/Avalonia.Win32/WindowImpl.cs

@@ -604,7 +604,7 @@ namespace Avalonia.Win32
                 hInstance = Marshal.GetHINSTANCE(GetType().Module),
                 hCursor = DefaultCursor,
                 hbrBackground = IntPtr.Zero,
-                lpszClassName = _className,
+                lpszClassName = _className
             };
 
             ushort atom = UnmanagedMethods.RegisterClassEx(ref wndClassEx);
@@ -681,5 +681,12 @@ namespace Avalonia.Win32
             UnmanagedMethods.ShowWindow(_hwnd, command);
         }
 
+        public void SetIcon(IIconImpl icon)
+        {
+            var impl = (IconImpl)icon;
+            var nativeIcon = impl.Icon;
+            UnmanagedMethods.PostMessage(_hwnd, (int)UnmanagedMethods.WindowsMessage.WM_SETICON,
+                new IntPtr((int)UnmanagedMethods.Icons.ICON_BIG), nativeIcon.Handle);
+        }
     }
 }