aistudio-wpf-diagram/Extensions/AIStudio.Wpf.Mind/Controls/ColorPicker.xaml.cs

using System;
using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Input;
using System.Windows.Media;

namespace  AIStudio.Wpf.Mind.Controls
{
    public enum ColorMode
    {
        ColorPalette,
        ColorCanvas
    }

    public enum ColorSortingMode
    {
        Alphabetical,
        HueSaturationBrightness
    }

    [TemplatePart(Name = PART_AvailableColors, Type = typeof(ListBox))]
    [TemplatePart(Name = PART_StandardColors, Type = typeof(ListBox))]
    [TemplatePart(Name = PART_RecentColors, Type = typeof(ListBox))]
    [TemplatePart(Name = PART_ColorPickerToggleButton, Type = typeof(ToggleButton))]
    [TemplatePart(Name = PART_ColorPickerPalettePopup, Type = typeof(Popup))]
    public class ColorPicker : Control
    {
        private const string PART_AvailableColors = "PART_AvailableColors";
        private const string PART_StandardColors = "PART_StandardColors";
        private const string PART_RecentColors = "PART_RecentColors";
        private const string PART_ColorPickerToggleButton = "PART_ColorPickerToggleButton";
        private const string PART_ColorPickerPalettePopup = "PART_ColorPickerPalettePopup";

        #region Members

        private ListBox _availableColors;
        private ListBox _standardColors;
        private ListBox _recentColors;
        private ToggleButton _toggleButton;
        private Popup _popup;
        private Color? _initialColor;
        private bool _selectionChanged;

        #endregion //Members

        #region Properties

        #region AdvancedButtonHeader

        public static readonly DependencyProperty AdvancedButtonHeaderProperty = DependencyProperty.Register("AdvancedButtonHeader", typeof(string), typeof(ColorPicker), new UIPropertyMetadata("Advanced"));
        public string AdvancedButtonHeader
        {
            get
            {
                return (string)GetValue(AdvancedButtonHeaderProperty);
            }
            set
            {
                SetValue(AdvancedButtonHeaderProperty, value);
            }
        }

        #endregion //AdvancedButtonHeader

        #region AvailableColors

        public static readonly DependencyProperty AvailableColorsProperty = DependencyProperty.Register("AvailableColors", typeof(ObservableCollection<ColorItem>), typeof(ColorPicker), new UIPropertyMetadata(CreateAvailableColors()));
        public ObservableCollection<ColorItem> AvailableColors
        {
            get
            {
                return (ObservableCollection<ColorItem>)GetValue(AvailableColorsProperty);
            }
            set
            {
                SetValue(AvailableColorsProperty, value);
            }
        }

        #endregion //AvailableColors

        #region AvailableColorsSortingMode

        public static readonly DependencyProperty AvailableColorsSortingModeProperty = DependencyProperty.Register("AvailableColorsSortingMode", typeof(ColorSortingMode), typeof(ColorPicker), new UIPropertyMetadata(ColorSortingMode.Alphabetical, OnAvailableColorsSortingModeChanged));
        public ColorSortingMode AvailableColorsSortingMode
        {
            get
            {
                return (ColorSortingMode)GetValue(AvailableColorsSortingModeProperty);
            }
            set
            {
                SetValue(AvailableColorsSortingModeProperty, value);
            }
        }

        private static void OnAvailableColorsSortingModeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ColorPicker colorPicker = (ColorPicker)d;
            if (colorPicker != null)
                colorPicker.OnAvailableColorsSortingModeChanged((ColorSortingMode)e.OldValue, (ColorSortingMode)e.NewValue);
        }

        private void OnAvailableColorsSortingModeChanged(ColorSortingMode oldValue, ColorSortingMode newValue)
        {
            ListCollectionView lcv = (ListCollectionView)(CollectionViewSource.GetDefaultView(this.AvailableColors));
            if (lcv != null)
            {
                lcv.CustomSort = (AvailableColorsSortingMode == ColorSortingMode.HueSaturationBrightness)
                                  ? new ColorSorter()
                                  : null;
            }
        }

        #endregion //AvailableColorsSortingMode

        #region AvailableColorsHeader

        public static readonly DependencyProperty AvailableColorsHeaderProperty = DependencyProperty.Register("AvailableColorsHeader", typeof(string), typeof(ColorPicker), new UIPropertyMetadata("Available Colors"));
        public string AvailableColorsHeader
        {
            get
            {
                return (string)GetValue(AvailableColorsHeaderProperty);
            }
            set
            {
                SetValue(AvailableColorsHeaderProperty, value);
            }
        }

        #endregion //AvailableColorsHeader

        #region ButtonStyle

        public static readonly DependencyProperty ButtonStyleProperty = DependencyProperty.Register("ButtonStyle", typeof(Style), typeof(ColorPicker));
        public Style ButtonStyle
        {
            get
            {
                return (Style)GetValue(ButtonStyleProperty);
            }
            set
            {
                SetValue(ButtonStyleProperty, value);
            }
        }

        #endregion //ButtonStyle

        #region ColorMode

        public static readonly DependencyProperty ColorModeProperty = DependencyProperty.Register("ColorMode", typeof(ColorMode), typeof(ColorPicker), new UIPropertyMetadata(ColorMode.ColorPalette));
        public ColorMode ColorMode
        {
            get
            {
                return (ColorMode)GetValue(ColorModeProperty);
            }
            set
            {
                SetValue(ColorModeProperty, value);
            }
        }

        #endregion //ColorMode

        #region IsOpen

        public static readonly DependencyProperty IsOpenProperty = DependencyProperty.Register("IsOpen", typeof(bool), typeof(ColorPicker), new UIPropertyMetadata(false, OnIsOpenChanged));
        public bool IsOpen
        {
            get
            {
                return (bool)GetValue(IsOpenProperty);
            }
            set
            {
                SetValue(IsOpenProperty, value);
            }
        }

        private static void OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ColorPicker colorPicker = (ColorPicker)d;
            if (colorPicker != null)
                colorPicker.OnIsOpenChanged((bool)e.OldValue, (bool)e.NewValue);

            if (colorPicker.IsOpen == false)
            {
            }
        }

        private void OnIsOpenChanged(bool oldValue, bool newValue)
        {
            if (newValue)
            {
                _initialColor = this.SelectedColor;
            }
            RoutedEventArgs args = new RoutedEventArgs(newValue ? OpenedEvent : ClosedEvent, this);
            this.RaiseEvent(args);
        }

        #endregion //IsOpen

        #region MaxDropDownWidth

        public static readonly DependencyProperty MaxDropDownWidthProperty = DependencyProperty.Register("MaxDropDownWidth", typeof(double)
          , typeof(ColorPicker), new UIPropertyMetadata(214d));
        public double MaxDropDownWidth
        {
            get
            {
                return (double)GetValue(MaxDropDownWidthProperty);
            }
            set
            {
                SetValue(MaxDropDownWidthProperty, value);
            }
        }

        private static void OnMaxDropDownWidthChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
        {
            var colorPicker = o as ColorPicker;
            if (colorPicker != null)
                colorPicker.OnMaxDropDownWidthChanged((double)e.OldValue, (double)e.NewValue);
        }

        protected virtual void OnMaxDropDownWidthChanged(double oldValue, double newValue)
        {

        }

        #endregion

        #region RecentColors

        public static readonly DependencyProperty RecentColorsProperty = DependencyProperty.Register("RecentColors", typeof(ObservableCollection<ColorItem>), typeof(ColorPicker), new UIPropertyMetadata(null));
        public ObservableCollection<ColorItem> RecentColors
        {
            get
            {
                return (ObservableCollection<ColorItem>)GetValue(RecentColorsProperty);
            }
            set
            {
                SetValue(RecentColorsProperty, value);
            }
        }

        #endregion //RecentColors

        #region RecentColorsHeader

        public static readonly DependencyProperty RecentColorsHeaderProperty = DependencyProperty.Register("RecentColorsHeader", typeof(string), typeof(ColorPicker), new UIPropertyMetadata("Recent Colors"));
        public string RecentColorsHeader
        {
            get
            {
                return (string)GetValue(RecentColorsHeaderProperty);
            }
            set
            {
                SetValue(RecentColorsHeaderProperty, value);
            }
        }

        #endregion //RecentColorsHeader

        #region SelectedColor

        public static readonly DependencyProperty SelectedColorProperty = DependencyProperty.Register("SelectedColor", typeof(Color?), typeof(ColorPicker), new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback(OnSelectedColorPropertyChanged)));
        public Color? SelectedColor
        {
            get
            {
                return (Color?)GetValue(SelectedColorProperty);
            }
            set
            {
                SetValue(SelectedColorProperty, value);
            }
        }

        private static void OnSelectedColorPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ColorPicker colorPicker = (ColorPicker)d;
            if (colorPicker != null)
                colorPicker.OnSelectedColorChanged((Color?)e.OldValue, (Color?)e.NewValue);
        }

        private void OnSelectedColorChanged(Color? oldValue, Color? newValue)
        {
            SelectedColorText = GetFormatedColorString(newValue);

            RoutedPropertyChangedEventArgs<Color?> args = new RoutedPropertyChangedEventArgs<Color?>(oldValue, newValue);
            args.RoutedEvent = ColorPicker.SelectedColorChangedEvent;
            RaiseEvent(args);
        }

        //public static readonly DependencyProperty SelectedBrushProperty = DependencyProperty.Register("SelectedBrush", typeof(Brush), typeof(ColorPicker), new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback(OnSelectedBrushPropertyChanged)));
        //public Brush SelectedBrush
        //{
        //    get
        //    {
        //        return (Brush)GetValue(SelectedBrushProperty);
        //    }
        //    set
        //    {
        //        SetValue(SelectedBrushProperty, value);
        //    }
        //}

        //private static void OnSelectedBrushPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        //{
        //    ColorPicker colorPicker = (ColorPicker)d;
        //    if (colorPicker != null)
        //        colorPicker.OnSelectedBrushChanged((Brush)e.OldValue, (Brush)e.NewValue);
        //}

        //private void OnSelectedBrushChanged(Brush oldValue, Brush newValue)
        //{
        //    if (newValue != null)
        //    {

        //    }
        //}

        #endregion //SelectedColor

        #region SelectedColorText

        public static readonly DependencyProperty SelectedColorTextProperty = DependencyProperty.Register("SelectedColorText", typeof(string), typeof(ColorPicker), new UIPropertyMetadata(""));
        public string SelectedColorText
        {
            get
            {
                return (string)GetValue(SelectedColorTextProperty);
            }
            protected set
            {
                SetValue(SelectedColorTextProperty, value);
            }
        }

        #endregion //SelectedColorText

        #region ShowTabHeaders

        public static readonly DependencyProperty ShowTabHeadersProperty = DependencyProperty.Register("ShowTabHeaders", typeof(bool), typeof(ColorPicker), new UIPropertyMetadata(true));
        public bool ShowTabHeaders
        {
            get
            {
                return (bool)GetValue(ShowTabHeadersProperty);
            }
            set
            {
                SetValue(ShowTabHeadersProperty, value);
            }
        }

        #endregion //ShowTabHeaders

        #region ShowAvailableColors

        public static readonly DependencyProperty ShowAvailableColorsProperty = DependencyProperty.Register("ShowAvailableColors", typeof(bool), typeof(ColorPicker), new UIPropertyMetadata(true));
        public bool ShowAvailableColors
        {
            get
            {
                return (bool)GetValue(ShowAvailableColorsProperty);
            }
            set
            {
                SetValue(ShowAvailableColorsProperty, value);
            }
        }

        #endregion //ShowAvailableColors

        #region ShowRecentColors

        public static readonly DependencyProperty ShowRecentColorsProperty = DependencyProperty.Register("ShowRecentColors", typeof(bool), typeof(ColorPicker), new UIPropertyMetadata(false));
        public bool ShowRecentColors
        {
            get
            {
                return (bool)GetValue(ShowRecentColorsProperty);
            }
            set
            {
                SetValue(ShowRecentColorsProperty, value);
            }
        }

        #endregion //DisplayRecentColors

        #region ShowStandardColors

        public static readonly DependencyProperty ShowStandardColorsProperty = DependencyProperty.Register("ShowStandardColors", typeof(bool), typeof(ColorPicker), new UIPropertyMetadata(true));
        public bool ShowStandardColors
        {
            get
            {
                return (bool)GetValue(ShowStandardColorsProperty);
            }
            set
            {
                SetValue(ShowStandardColorsProperty, value);
            }
        }

        #endregion //DisplayStandardColors

        #region ShowDropDownButton

        public static readonly DependencyProperty ShowDropDownButtonProperty = DependencyProperty.Register("ShowDropDownButton", typeof(bool), typeof(ColorPicker), new UIPropertyMetadata(true));
        public bool ShowDropDownButton
        {
            get
            {
                return (bool)GetValue(ShowDropDownButtonProperty);
            }
            set
            {
                SetValue(ShowDropDownButtonProperty, value);
            }
        }

        #endregion //ShowDropDownButton

        #region StandardButtonHeader

        public static readonly DependencyProperty StandardButtonHeaderProperty = DependencyProperty.Register("StandardButtonHeader", typeof(string), typeof(ColorPicker), new UIPropertyMetadata("Standard"));
        public string StandardButtonHeader
        {
            get
            {
                return (string)GetValue(StandardButtonHeaderProperty);
            }
            set
            {
                SetValue(StandardButtonHeaderProperty, value);
            }
        }

        #endregion //StandardButtonHeader

        #region StandardColors

        public static readonly DependencyProperty StandardColorsProperty = DependencyProperty.Register("StandardColors", typeof(ObservableCollection<ColorItem>), typeof(ColorPicker), new UIPropertyMetadata(CreateStandardColors()));
        public ObservableCollection<ColorItem> StandardColors
        {
            get
            {
                return (ObservableCollection<ColorItem>)GetValue(StandardColorsProperty);
            }
            set
            {
                SetValue(StandardColorsProperty, value);
            }
        }

        #endregion //StandardColors

        #region StandardColorsHeader

        public static readonly DependencyProperty StandardColorsHeaderProperty = DependencyProperty.Register("StandardColorsHeader", typeof(string), typeof(ColorPicker), new UIPropertyMetadata("Standard Colors"));
        public string StandardColorsHeader
        {
            get
            {
                return (string)GetValue(StandardColorsHeaderProperty);
            }
            set
            {
                SetValue(StandardColorsHeaderProperty, value);
            }
        }

        #endregion //StandardColorsHeader

        #region UsingAlphaChannel

        public static readonly DependencyProperty UsingAlphaChannelProperty = DependencyProperty.Register("UsingAlphaChannel", typeof(bool), typeof(ColorPicker), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback(OnUsingAlphaChannelPropertyChanged)));
        public bool UsingAlphaChannel
        {
            get
            {
                return (bool)GetValue(UsingAlphaChannelProperty);
            }
            set
            {
                SetValue(UsingAlphaChannelProperty, value);
            }
        }

        private static void OnUsingAlphaChannelPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ColorPicker colorPicker = (ColorPicker)d;
            if (colorPicker != null)
                colorPicker.OnUsingAlphaChannelChanged();
        }

        private void OnUsingAlphaChannelChanged()
        {
            SelectedColorText = GetFormatedColorString(SelectedColor);
        }

        #endregion //UsingAlphaChannel

        /// <summary>Identifies the <see cref="Content"/> dependency property.</summary>
        public static readonly DependencyProperty ContentProperty
            = DependencyProperty.Register(nameof(Content),
                                          typeof(object),
                                          typeof(ColorPicker));

        /// <summary>
        /// Gets or sets the content of this control.
        /// </summary>
        public object Content
        {
            get => (object)this.GetValue(ContentProperty);
            set => this.SetValue(ContentProperty, value);
        }

        #endregion //Properties

        #region Constructors

        static ColorPicker()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(ColorPicker), new FrameworkPropertyMetadata(typeof(ColorPicker)));
        }

        public ColorPicker()
        {
#if VS2008
        this.RecentColors = new ObservableCollection<ColorItem>();
#else
            this.SetCurrentValue(ColorPicker.RecentColorsProperty, new ObservableCollection<ColorItem>());
#endif

            Keyboard.AddKeyDownHandler(this, OnKeyDown);
            Mouse.AddPreviewMouseDownOutsideCapturedElementHandler(this, OnMouseDownOutsideCapturedElement);
        }

        #endregion //Constructors

        #region Base Class Overrides

        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();

            if (_availableColors != null)
                _availableColors.SelectionChanged -= Color_SelectionChanged;

            _availableColors = GetTemplateChild(PART_AvailableColors) as ListBox;
            if (_availableColors != null)
                _availableColors.SelectionChanged += Color_SelectionChanged;

            if (_standardColors != null)
                _standardColors.SelectionChanged -= Color_SelectionChanged;

            _standardColors = GetTemplateChild(PART_StandardColors) as ListBox;
            if (_standardColors != null)
                _standardColors.SelectionChanged += Color_SelectionChanged;

            if (_recentColors != null)
                _recentColors.SelectionChanged -= Color_SelectionChanged;

            _recentColors = GetTemplateChild(PART_RecentColors) as ListBox;
            if (_recentColors != null)
                _recentColors.SelectionChanged += Color_SelectionChanged;

            if (_popup != null)
                _popup.Opened -= Popup_Opened;

            _popup = GetTemplateChild(PART_ColorPickerPalettePopup) as Popup;
            if (_popup != null)
                _popup.Opened += Popup_Opened;

            _toggleButton = this.Template.FindName(PART_ColorPickerToggleButton, this) as ToggleButton;
        }

        protected override void OnMouseUp(MouseButtonEventArgs e)
        {
            base.OnMouseUp(e);

            // Close ColorPicker on MouseUp to prevent action of mouseUp on controls behind the ColorPicker.
            if (_selectionChanged)
            {
                CloseColorPicker(true);
                _selectionChanged = false;
            }
        }

        #endregion //Base Class Overrides

        #region Event Handlers

        private void OnKeyDown(object sender, KeyEventArgs e)
        {
            if (!IsOpen)
            {
                if (KeyboardUtilities.IsKeyModifyingPopupState(e))
                {
                    IsOpen = true;
                    // Focus will be on ListBoxItem in Popup_Opened().
                    e.Handled = true;
                }
            }
            else
            {
                if (KeyboardUtilities.IsKeyModifyingPopupState(e))
                {
                    CloseColorPicker(true);
                    e.Handled = true;
                }
                else if (e.Key == Key.Escape)
                {
                    this.SelectedColor = _initialColor;
                    CloseColorPicker(true);
                    e.Handled = true;
                }
            }
        }

        private void OnMouseDownOutsideCapturedElement(object sender, MouseButtonEventArgs e)
        {
            CloseColorPicker(true);
        }

        private void Color_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ListBox lb = (ListBox)sender;

            if (e.AddedItems.Count > 0)
            {
                var colorItem = (ColorItem)e.AddedItems[0];
                SelectedColor = colorItem.Color;
                if (!string.IsNullOrEmpty(colorItem.Name))
                {
                    this.SelectedColorText = colorItem.Name;
                }
                UpdateRecentColors(colorItem);
                _selectionChanged = true;
                lb.SelectedIndex = -1; //for now I don't care about keeping track of the selected color
            }
        }

        private void Popup_Opened(object sender, EventArgs e)
        {
            if ((_availableColors != null) && ShowAvailableColors)
            {
                FocusOnListBoxItem(_availableColors);
            }
            else if ((_standardColors != null) && ShowStandardColors)
                FocusOnListBoxItem(_standardColors);
            else if ((_recentColors != null) && ShowRecentColors)
                FocusOnListBoxItem(_recentColors);
        }

        private void FocusOnListBoxItem(ListBox listBox)
        {
            ListBoxItem listBoxItem = (ListBoxItem)listBox.ItemContainerGenerator.ContainerFromItem(listBox.SelectedItem);
            if ((listBoxItem == null) && (listBox.Items.Count > 0))
                listBoxItem = (ListBoxItem)listBox.ItemContainerGenerator.ContainerFromItem(listBox.Items[0]);
            if (listBoxItem != null)
                listBoxItem.Focus();
        }

        #endregion //Event Handlers

        #region Events

        #region SelectedColorChangedEvent

        public static readonly RoutedEvent SelectedColorChangedEvent = EventManager.RegisterRoutedEvent("SelectedColorChanged", RoutingStrategy.Bubble, typeof(RoutedPropertyChangedEventHandler<Color?>), typeof(ColorPicker));
        public event RoutedPropertyChangedEventHandler<Color?> SelectedColorChanged
        {
            add
            {
                AddHandler(SelectedColorChangedEvent, value);
            }
            remove
            {
                RemoveHandler(SelectedColorChangedEvent, value);
            }
        }

        #endregion

        #region OpenedEvent

        public static readonly RoutedEvent OpenedEvent = EventManager.RegisterRoutedEvent("OpenedEvent", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(ColorPicker));
        public event RoutedEventHandler Opened
        {
            add
            {
                AddHandler(OpenedEvent, value);
            }
            remove
            {
                RemoveHandler(OpenedEvent, value);
            }
        }

        #endregion //OpenedEvent

        #region ClosedEvent

        public static readonly RoutedEvent ClosedEvent = EventManager.RegisterRoutedEvent("ClosedEvent", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(ColorPicker));
        public event RoutedEventHandler Closed
        {
            add
            {
                AddHandler(ClosedEvent, value);
            }
            remove
            {
                RemoveHandler(ClosedEvent, value);
            }
        }

        #endregion //ClosedEvent

        #endregion //Events

        #region Methods

        private void CloseColorPicker(bool isFocusOnColorPicker)
        {
            if (IsOpen)
                IsOpen = false;
            ReleaseMouseCapture();

            if (isFocusOnColorPicker && (_toggleButton != null))
                _toggleButton.Focus();
            this.UpdateRecentColors(new ColorItem(SelectedColor, SelectedColorText));
        }

        private void UpdateRecentColors(ColorItem colorItem)
        {
            if (!RecentColors.Contains(colorItem))
                RecentColors.Add(colorItem);

            if (RecentColors.Count > 10) //don't allow more than ten, maybe make a property that can be set by the user.
                RecentColors.RemoveAt(0);
        }

        private string GetFormatedColorString(Color? colorToFormat)
        {
            if ((colorToFormat == null) || !colorToFormat.HasValue)
                return string.Empty;

            return ColorUtilities.FormatColorString(colorToFormat.Value.GetColorName(), UsingAlphaChannel);
        }

        private static ObservableCollection<ColorItem> CreateStandardColors()
        {
            ObservableCollection<ColorItem> standardColors = new ObservableCollection<ColorItem>();
            standardColors.Add(new ColorItem(Colors.Transparent, "Transparent"));
            standardColors.Add(new ColorItem(Colors.White, "White"));
            standardColors.Add(new ColorItem(Colors.Gray, "Gray"));
            standardColors.Add(new ColorItem(Colors.Black, "Black"));
            standardColors.Add(new ColorItem(Colors.Red, "Red"));
            standardColors.Add(new ColorItem(Colors.Green, "Green"));
            standardColors.Add(new ColorItem(Colors.Blue, "Blue"));
            standardColors.Add(new ColorItem(Colors.Yellow, "Yellow"));
            standardColors.Add(new ColorItem(Colors.Orange, "Orange"));
            standardColors.Add(new ColorItem(Colors.Purple, "Purple"));
            return standardColors;
        }

        private static ObservableCollection<ColorItem> CreateAvailableColors()
        {
            ObservableCollection<ColorItem> standardColors = new ObservableCollection<ColorItem>();

            foreach (var item in ColorUtilities.KnownColors)
            {
                if (!String.Equals(item.Key, "Transparent"))
                {
                    var colorItem = new ColorItem(item.Value, item.Key);
                    if (!standardColors.Contains(colorItem))
                        standardColors.Add(colorItem);
                }
            }

            return standardColors;
        }

        #endregion //Methods
    }

    public class KeyboardUtilities
    {
        public static bool IsKeyModifyingPopupState(KeyEventArgs e)
        {
            return ((((Keyboard.Modifiers & ModifierKeys.Alt) == ModifierKeys.Alt) && ((e.SystemKey == Key.Down) || (e.SystemKey == Key.Up)))
                  || (e.Key == Key.F4));
        }
    }
}