Add generic category window to WPF library

Windows/CategoryPanel.cs

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+using System;
+using System.Windows.Controls;
+
+namespace Common.Wpf.Windows
+{
+    public class CategoryPanel : UserControl
+    {
+        private object Data { get; set; }
+
+        public virtual void LoadPanel(object data)
+        {
+            Data = data;
+        }
+
+        public virtual bool ValidatePanel()
+        {
+            throw new NotImplementedException();
+        }
+
+        public virtual void SavePanel()
+        {
+            throw new NotImplementedException();
+        }
+
+        public virtual string CategoryName => null;
+    }
+}

Windows/CategoryWindow.xaml

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+<Window x:Class="Common.Wpf.Windows.CategoryWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="[Title]"
+        Height="320"
+        Width="566"
+        ResizeMode="CanResize"
+        WindowStartupLocation="CenterScreen">
+    <Grid>
+        <ListBox HorizontalAlignment="Left"
+                 Name="CategoryList"
+                 Width="126"
+                 SelectionChanged="HandleSelectedCategoryChanged"
+                 Margin="12,12,0,41" />
+        <ContentControl Margin="144,12,12,41"
+                        Name="CategoryContent"
+                        IsTabStop="False" />
+        <Button Content="[OK]"
+                Height="23"
+                HorizontalAlignment="Right"
+                Margin="0,0,93,12"
+                Name="OkayButton"
+                VerticalAlignment="Bottom"
+                Width="75"
+                IsDefault="True"
+                Click="HandleOkayButtonClick" />
+        <Button Content="[Cancel]"
+                Margin="0,0,12,12"
+                Name="CancelButton"
+                Height="23"
+                VerticalAlignment="Bottom"
+                HorizontalAlignment="Right"
+                Width="75"
+                IsCancel="True" />
+    </Grid>
+</Window>

Windows/CategoryWindow.xaml.cs

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+using Common.Wpf.Extensions;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Resources;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace Common.Wpf.Windows
+{
+    public partial class CategoryWindow
+    {
+        private readonly List<CategoryPanel> _optionPanels;
+
+        private readonly object _data;
+
+        public CategoryWindow(object data, List<CategoryPanel> panels, ResourceManager resourceManager, string resourcePrefix)
+        {
+            InitializeComponent();
+
+            _data = data;
+
+            Icon = ((Icon) resourceManager.GetObject(resourcePrefix + "_Icon")).ToImageSource();
+            Title = resourceManager.GetString(resourcePrefix + "_Title");
+            OkayButton.Content = resourceManager.GetString(resourcePrefix + "_OkayButton");
+            CancelButton.Content = resourceManager.GetString(resourcePrefix + "_CancelButton");
+
+            // Add all the option categories
+            _optionPanels = panels;
+
+            // Load the category list
+            LoadCategories();
+        }
+
+        private void LoadCategories()
+        {
+            // Loop over each panel
+            foreach (CategoryPanel optionsPanel in _optionPanels)
+            {
+                // Tell the panel to load itself
+                optionsPanel.LoadPanel(_data);
+
+                // Add the panel to the category ist
+                CategoryList.Items.Add(new CategoryListItem(optionsPanel));
+
+                // Set the panel into the right side
+                CategoryContent.Content = optionsPanel;
+            }
+
+            // Select the first item
+            CategoryList.SelectedItem = CategoryList.Items[0];
+        }
+
+        private void SelectCategory(CategoryPanel panel)
+        {
+            // Set the content
+            CategoryContent.Content = panel;
+        }
+
+        private void HandleSelectedCategoryChanged(object sender, SelectionChangedEventArgs e)
+        {
+            // Select the right category
+            SelectCategory(((CategoryListItem) CategoryList.SelectedItem).Panel);
+        }
+
+        private class CategoryListItem
+        {
+            public CategoryPanel Panel { get; private set; }
+
+            public CategoryListItem(CategoryPanel panel)
+            {
+                Panel = panel;
+            }
+
+            public override string ToString()
+            {
+                return Panel.CategoryName;
+            }
+        }
+
+        private void HandleOkayButtonClick(object sender, RoutedEventArgs e)
+        {
+            // Loop over each panel and ask them to validate
+            foreach (var optionsPanel in _optionPanels)
+            {
+                // If validation fails...
+                if (!optionsPanel.ValidatePanel())
+                {
+                    // ...select the right category
+                    SelectCategory(optionsPanel);
+
+                    // Stop validation
+                    return;
+                }
+            }
+
+            // Loop over each panel and ask them to save
+            foreach (CategoryPanel optionsPanel in _optionPanels)
+            {
+                // Save!
+                optionsPanel.SavePanel();
+            }
+
+            // Save the actual settings
+            //_data.SaveChanges();
+            //Properties.Settings.Default.Save();
+
+            DialogResult = true;
+
+            // Close the window
+            Close();
+        }
+    }
+}