Extensions/UIElementExtension.cs

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using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Media;

namespace Micro.Ui.RunningTextStyle.Extensions
{
    /// <summary>
    /// UIElement类扩展方法
    /// </summary>
    public static class UIElementExtension
    {
        /// <summary>
        /// Loaded的时候执行，如果IsLoaded=True，立即执行
        /// </summary>
        /// <param name="ele"></param>
        /// <param name="action"></param>
        public static void ExecuteWhenLoaded(this FrameworkElement ele, Action action)
        {
            if (ele.IsLoaded)
                action.Invoke();
            else
            {
                ele.Loaded += OnLoaded;

                void OnLoaded(Object sender, RoutedEventArgs e)
                {
                    ele.Loaded -= OnLoaded;
                    action.Invoke();
                }
            }
        }

        /// <summary>
        /// Unloaded的时候执行
        /// </summary>
        /// <param name="ele"></param>
        /// <param name="action"></param>
        public static void ExecuteWhenUnloaded(this FrameworkElement ele, Action action)
        {
            ele.Unloaded += OnUnloaded;

            void OnUnloaded(Object sender, RoutedEventArgs e)
            {
                ele.Unloaded -= OnUnloaded;
                action.Invoke();
            }
        }

        /// <summary>
        /// 窗口关闭时执行
        /// </summary>
        /// <param name="win"></param>
        /// <param name="action"></param>
        public static void ExecuteWhenClosed(this Window win, Action action)
        {
            win.Closed += OnClosed;

            void OnClosed(Object sender, EventArgs e)
            {