packages/MaterialDesignThemes.2.5.1/src/net45/ComboBoxPopup.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;

namespace MaterialDesignThemes.Wpf
{
    public enum ComboBoxPopupPlacement
    {
        Undefined,
        Down,
        Up,
        Classic
    }

    public class ComboBoxPopup : Popup
    {
        #region UpContentTemplate property

        public static readonly DependencyProperty UpContentTemplateProperty
            = DependencyProperty.Register(nameof(UpContentTemplate),
                typeof(ControlTemplate),
                typeof(ComboBoxPopup),
                new UIPropertyMetadata(null, CreateTemplatePropertyChangedCallback(ComboBoxPopupPlacement.Classic)));

        public ControlTemplate UpContentTemplate
        {
            get { return (ControlTemplate)GetValue(UpContentTemplateProperty); }
            set { SetValue(UpContentTemplateProperty, value); }
        }

        #endregion

        #region DownContentTemplate region

        public static readonly DependencyProperty DownContentTemplateProperty
            = DependencyProperty.Register(nameof(DownContentTemplate),
                typeof(ControlTemplate),
                typeof(ComboBoxPopup),
                new UIPropertyMetadata(null, CreateTemplatePropertyChangedCallback(ComboBoxPopupPlacement.Down)));

        public ControlTemplate DownContentTemplate
        {
            get { return (ControlTemplate)GetValue(DownContentTemplateProperty); }
            set { SetValue(DownContentTemplateProperty, value); }
        }

        #endregion

        #region ClassicContentTemplate property

        public static readonly DependencyProperty ClassicContentTemplateProperty
            = DependencyProperty.Register(nameof(ClassicContentTemplate),
                typeof(ControlTemplate),
                typeof(ComboBoxPopup),
                new UIPropertyMetadata(null, CreateTemplatePropertyChangedCallback(ComboBoxPopupPlacement.Up)));