【自定义Lable特效】YouTube搬运超赞自定义Lable控件特效

**贱贱的贱贱** · 发表于 2015-1-3 19:13:53

说明：
先上GIf图，帧数有点低，但是实际效果比这个好很多。

效果图：

源码展示：

[C#] 纯文本查看 复制代码

 class DecodeLabel:Label
    {
        private readonly Timer _timerAnimate = new Timer();
        private TextDecodeEffect _decodeEffect;
        private bool _showing;
        private int _initGenCount;

        public int Interval
        {
            get { return _timerAnimate.Interval; }
            set { _timerAnimate.Interval = value; }
        }

        public DecodeLabel()
        {
            _timerAnimate.Interval = 100;
            _timerAnimate.Tick += _timerAnimate_Tick;
        }

        public void Animate(bool show, string text, int initGenCount)
        {
            _initGenCount = initGenCount;
            _decodeEffect = new TextDecodeEffect(text) { TextVisible = !show };
            Text = _decodeEffect.Peek(DecodeMode.None);
            _showing = show;
            _timerAnimate.Start();
        }
        private void _timerAnimate_Tick(object sender, EventArgs e)
        {
            if (_initGenCount != 0)
            {
                Text = _decodeEffect.GenerateNumberRange(Text.Length);
                _initGenCount--;
                return;
            }

            var decodeMode = _showing ? DecodeMode.Show : DecodeMode.Hide;
            var text = _decodeEffect.Peek(decodeMode);

            if (text == null)
            {
                _timerAnimate.Stop();
            }
            else
            {
                Text = text;
            }
        }
    }

    public enum DecodeMode
    {
        None,
        Show,
        Numbers,
        Hide
    }

    class TextDecodeEffect
    {
        private int _visibleCount;
        private readonly Random _random = new Random();

        public bool TextVisible
        {
            get { return _visibleCount == OriginalText.Length;}
            set { _visibleCount = value ? OriginalText.Length : 0; }
        }
        public string OriginalText { get; private set; }

        public TextDecodeEffect(string text)
        {
            OriginalText = text;
        }

        public string Peek(DecodeMode mode)
        {
            switch (mode)
            {
                case DecodeMode.Numbers:
                    return GenerateNumberRange(OriginalText.Length);
                case DecodeMode.Hide:
                    if (_visibleCount == 0) return null;
                    _visibleCount--;
                    break;
                case DecodeMode.Show:
                    if (_visibleCount == OriginalText.Length) return null;
                    _visibleCount++;
                    break;
            }
            var text = GenerateNumberRange(OriginalText.Length - _visibleCount);
            text += OriginalText.Substring(OriginalText.Length - _visibleCount, _visibleCount);
            return text;
        }
        public string GenerateNumberRange(int count)
        {
            var SB = new StringBuilder();
            for (int i = 0; i < count; i++)
                SB.Append(_random.Next(0, 10));
            return SB.ToString();
        }
    }

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