Initial commit

ImageButton/ImageButton.xaml

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+<Button x:Class="ChrisKaczor.Wpf.Controls.Toolbar.ImageButton"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        mc:Ignorable="d"
+        d:DesignHeight="20"
+        d:DesignWidth="20">
+    <Button.Resources>
+        <Style TargetType="{x:Type Image}"
+               x:Key="toolbarImageStyle">
+            <Style.Triggers>
+                <DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type Button}, AncestorLevel=1}, Path=IsEnabled}"
+                             Value="False">
+                    <Setter Property="Opacity"
+                            Value="0.25" />
+                </DataTrigger>
+            </Style.Triggers>
+        </Style>
+    </Button.Resources>
+    <Image x:Name="image"
+           HorizontalAlignment="Center"
+           VerticalAlignment="Center"
+           Style="{StaticResource toolbarImageStyle}" />
+</Button>

ImageButton/ImageButton.xaml.cs

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+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+
+namespace ChrisKaczor.Wpf.Controls.Toolbar
+{
+    public partial class ImageButton
+    {
+        public ImageButton()
+        {
+            InitializeComponent();
+
+            Loaded += HandleImageButtonLoaded;
+        }
+
+        void HandleImageButtonLoaded(object sender, RoutedEventArgs e)
+        {
+            if (Style == null && Parent is ToolBar)
+            {
+                Style = (Style) FindResource(ToolBar.ButtonStyleKey);
+            }
+        }        
+
+        public ImageSource ImageSource
+        {
+            get { return image.Source; }
+            set { image.Source = value; }
+        }
+    }
+}