using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.Drawing;
using System.ComponentModel;
using Timer = System.Windows.Forms.Timer;

namespace HotelPms.Share.Windows.Component
{
    public class AntLabel : Label
    {
        private int m_BeginX = 0;
        private Timer timer1;
        private System.ComponentModel.IContainer components;
        private StringFormat sf = null;
        private bool m_AnimationEnabled = false;

        public bool AnimationEnabled
        {
            get { return m_AnimationEnabled; }
            set 
            { 
                m_AnimationEnabled = value;
                timer1.Enabled = m_AnimationEnabled;
                this.Invalidate();
            }
        }

        private int m_Interval = 300;

        public int Interval
        {
            get { return m_Interval; }
            set 
            { 
                m_Interval = value;
                if (timer1 != null)
                {
                    timer1.Interval = m_Interval;
                    this.Invalidate();
                }
            }
        }

        public AntLabel()
        {
            InitializeComponent();
            sf = new StringFormat();
            sf.Alignment = StringAlignment.Center;
            sf.LineAlignment = StringAlignment.Center;
            timer1.Enabled = false;
        }

        private LinearGradientMode m_GradientMode = LinearGradientMode.Vertical;
        [Description("EndBackColor"), Category("CTextBoxArray動作")]
        public LinearGradientMode GradientMode
        {
            get { return m_GradientMode; }
            set { m_GradientMode = value; this.Invalidate(); }
        }


        private Color m_EndBackColor = Color.FromArgb(120, 150, 150);

        [Description("EndBackColor"), Category("CTextBoxArray動作")]
        public Color EndBackColor
        {
            get { return m_EndBackColor; }
            set { m_EndBackColor = value; this.Invalidate(); }
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            int offset = 3;
            Rectangle r = new Rectangle(offset, offset, this.ClientRectangle.Width - offset, this.ClientRectangle.Height - offset);
            
            if (m_AnimationEnabled)
            {
                using (LinearGradientBrush lgb = new LinearGradientBrush(new Rectangle(m_BeginX, 0, this.Width, this.Height), Color.White, Color.Gainsboro, LinearGradientMode.Horizontal))
                {
                    Color[] colors = new Color[]
                {
                    Color.FromArgb(255, 0, 0),
                    Color.FromArgb(255, 0, 0),
                    Color.FromArgb(255, 128, 0),
                    Color.FromArgb(255, 255, 0),
                    Color.FromArgb(0, 255, 0),
                    Color.FromArgb(0, 255, 128),
                    Color.FromArgb(0, 255, 255),
                    Color.FromArgb(0, 128, 255),
                    Color.FromArgb(0, 0, 255),
                    Color.FromArgb(0, 0, 255),
                };

                    int num_colors = colors.Length;
                    float[] blend_positions = new float[num_colors];
                    for (int i = 0; i < num_colors; i++)
                    {
                        blend_positions[i] = i / (num_colors - 1f);
                    }

                    ColorBlend color_blend = new ColorBlend();
                    color_blend.Colors = colors;
                    color_blend.Positions = blend_positions;
                    lgb.InterpolationColors = color_blend;

                    //e.Graphics.Clear(this.BackColor);
                    using (LinearGradientBrush brush = new LinearGradientBrush(this.ClientRectangle, m_EndBackColor, BackColor, m_GradientMode))
                    {
                        brush.SetSigmaBellShape(0.4f, 0.45f);   //创建基于钟形曲线的渐变过渡过程。
                        e.Graphics.FillRectangle(brush, this.ClientRectangle);
                    }

                    // Draw the string again.
                    e.Graphics.DrawString(this.Text, this.Font, lgb, r, sf);
                }
            }
            else
            {
                using (Brush defBrush = new SolidBrush(this.ForeColor))
                {
                    //e.Graphics.Clear(this.BackColor);
                    using (LinearGradientBrush brush = new LinearGradientBrush(this.ClientRectangle, m_EndBackColor, BackColor, m_GradientMode))
                    {
                        brush.SetSigmaBellShape(0.4f, 0.45f);   //创建基于钟形曲线的渐变过渡过程。
                        e.Graphics.FillRectangle(brush, this.ClientRectangle);
                    }

                    e.Graphics.DrawString(this.Text, this.Font, defBrush, r, sf);
                }
            }
        }

        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.timer1 = new System.Windows.Forms.Timer(this.components);
            this.SuspendLayout();
            // 
            // timer1
            // 
            this.timer1.Interval = 1000;
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
            this.ResumeLayout(false);

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            try
            {
                timer1.Enabled = false;
                m_BeginX += 5;
                if (m_BeginX > this.Width) { m_BeginX = 0; }
                this.Invalidate();
            }
            catch { }
            finally
            {
                timer1.Enabled = true;
            }
        }
    }
}