/*
	Classe MyWpfExtensions : PlayAnimations
	Jouer des animations les unes après les autres facilement !
	Version 1.0 - Last Modif : 08/01/2009 15:00
	Développé par Sebastien WARIN < sebastien [arobase] warin [point] fr >
	(c) 2009 - http://sebastien.warin.fr

*/

using System;
using System.Windows;
using System.Windows.Media.Animation;

namespace SmartCooking
{
    public static class MyWpfExtensions
    {
        public static void PlayAnimations(this Window window, params string[] animationsName)
        {
            // If animationsName is empty: return
            if (animationsName.Length <= 0) return;
            // For each animation
            for (int i = 0; i < animationsName.Length; i++)
            {
                // Get Storyboard object
                var anim = window.GetStoryBoard(animationsName[i]);
                if (anim != null)
                {
                    // If not the last animation,
                    if (i < (animationsName.Length - 1))
                    {
                        // Add handler on the Completed event of the current storyboard to play the te next animation
                        anim.Completed += new EventHandler(
                            new StoryboardPlayNextHandler(window, anim, animationsName[i + 1]).OnHandler);
                    }
                }
            }
            // Finally, play the 1st animation
            window.BeginStoryboard(window.GetStoryBoard(animationsName[0]));
        }

        public static Storyboard GetStoryBoard(this Window window, string name)
        {
            if (window.Resources.Contains(name))
                return (Storyboard)window.Resources[name];
            else
                return null;
        }

        public class StoryboardPlayNextHandler
        {
            private string _nextAnimationName;
            private Storyboard _actualStoryBoard;
            private Window _window;

            public StoryboardPlayNextHandler(Window window,
                Storyboard actualStoryBoard, string nextAnimationName)
            {
                this._actualStoryBoard = actualStoryBoard;
                this._nextAnimationName = nextAnimationName;
                this._window = window;
            }

            public void OnHandler(object sender, EventArgs e)
            {
                if (_actualStoryBoard != null)
                {
                    // Remove the current handler on the completed event !
                    _actualStoryBoard.Completed -= new EventHandler(this.OnHandler);
                    // Launch next storyboard
                    _window.BeginStoryboard(_window.GetStoryBoard(_nextAnimationName));
                }
            }
        }
    }
}