Wino-Mail/Wino.Mail/Views/Abstract/MailRenderingPageAbstract.cs

using Windows.UI.Xaml;
using Wino.Core.UWP;
using Wino.Mail.ViewModels;

namespace Wino.Views.Abstract
{
    public abstract class MailRenderingPageAbstract : BasePage<MailRenderingPageViewModel>
    {
        public bool IsDarkEditor
        {
            get { return (bool)GetValue(IsDarkEditorProperty); }
            set { SetValue(IsDarkEditorProperty, value); }
        }

        public static readonly DependencyProperty IsDarkEditorProperty = DependencyProperty.Register(nameof(IsDarkEditor), typeof(bool), typeof(MailRenderingPageAbstract), new PropertyMetadata(false, OnIsComposerDarkModeChanged));

        private static void OnIsComposerDarkModeChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
        {
            if (obj is MailRenderingPageAbstract page)
            {
                page.OnEditorThemeChanged();
            }
        }

        public virtual void OnEditorThemeChanged() { }
    }
}