using DevExpress.XtraEditors;
using DevExpress.XtraPrinting;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace XdCxRhDW.App.UserControl
{
    public partial class UcCtrlPage : DevExpress.XtraEditors.XtraUserControl
    {
        public event EventHandler OnPageChanged;
        public UcCtrlPage()
        {
            InitializeComponent();

        }

        //每页显示记录数
        private int pageSize = 10;
        //当前页
        private int pageIndex = 1;
        //总页数
        private int pageCount = 0;
        //总记录数
        private int totalCount = 0;

        public int PageSize { get => pageSize; set => pageSize = value; }
        public int PageIndex { get => pageIndex; set => pageIndex = value; }
        public int PageCount
        {
            get
            {
                if (pageSize != 0)
                {
                    pageCount = GetPageCount();
                }
                return pageCount;
            }
            set { pageCount = value; }
        }
        public int TotalCount { get => totalCount; set => totalCount = value; }


        /// <summary>
        /// 计算总页数
        /// </summary>
        /// <returns></returns>
        private int GetPageCount()
        {
            if (PageSize == 0)
            {
                return 0;
            }
            int pageCount = TotalCount / PageSize;
            if (TotalCount % PageSize == 0)
            {
                pageCount = TotalCount / PageSize;
            }
            else
            {
                pageCount = TotalCount / PageSize + 1;
            }
            return pageCount;
        }

        /// <summary>
        /// 首页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void linkFirst_LinkClicked(object sender, EventArgs e)
        {
            PageIndex = 1;
            DrawControl(true);
        }

        /// <summary>
        /// 上一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void linkPrev_LinkClicked(object sender, EventArgs e)
        {
            PageIndex = Math.Max(1, PageIndex - 1);
            DrawControl(true);
        }


        /// <summary>
        /// 下一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void linkNext_LinkClicked(object sender, EventArgs e)
        {
            PageIndex = Math.Min(PageCount, PageIndex + 1);
            DrawControl(true);
        }

        /// <summary>
        /// 末页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void linkLast_LinkClicked(object sender, EventArgs e)
        {

            PageIndex = PageCount;
            DrawControl(true);
        }

        public void DrawControl(int count)
        {
            TotalCount = count;
            DrawControl(false);
        }

        /// <summary>
        /// 页面控件呈现
        /// </summary>
        private void DrawControl(bool callEvent)
        {
            lblTotalPage.Text = new StringBuilder("第 ").Append(PageIndex.ToString()).Append(" / ").Append(PageCount.ToString()).Append(" 页").ToString();
            lblTotalCount.Text = new StringBuilder("共 ").Append(TotalCount.ToString()).Append(" 条").ToString();
            cbbPageSize.Text = PageSize.ToString();

            if (callEvent && OnPageChanged != null)
            {
                OnPageChanged(this, null);//当前分页数字改变时，触发委托事件
            }
            SetFormCtrEnabled();
            if (PageCount <= 1)//有且仅有一页
            {
                linkFirst.Enabled = false;
                linkPrev.Enabled = false;
                linkNext.Enabled = false;
                linkLast.Enabled = false;
                linkGo.Enabled = false;
            }
            else if (PageIndex == 1)//第一页
            {
                linkFirst.Enabled = false;
                linkPrev.Enabled = false;
            }
            else if (PageIndex == PageCount)//最后一页
            {
                linkNext.Enabled = false;
                linkLast.Enabled = false;
            }
        }

        private void SetFormCtrEnabled()
        {
            linkFirst.Enabled = true;
            linkPrev.Enabled = true;
            linkNext.Enabled = true;
            linkLast.Enabled = true;
            linkGo.Enabled = true;
        }

        /// <summary>
        /// enter键功能
        /// </summary>
        private void txtPageNum_KeyPress(object sender, KeyPressEventArgs e)
        {
            linkGo_LinkClicked(null, null);
        }

        /// <summary>
        /// 跳转页数限制
        /// </summary>
        private void txtPageNum_TextChanged(object sender, EventArgs e)
        {
            int num = 0;
            if (int.TryParse(txtPageNum.Text.Trim(), out num) && num > 0)
            {
                if (num > PageCount)
                {
                    txtPageNum.Text = PageCount.ToString();
                }
            }
        }

        /// <summary>
        /// 跳转指定页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void linkGo_LinkClicked(object sender, EventArgs e)
        {
            int num = 0;
            if (int.TryParse(txtPageNum.Text.Trim(), out num) && num > 0)
            {
                PageIndex = num;
                DrawControl(true);
            }
        }



        private void PageControl_Paint(object sender, PaintEventArgs e)
        {
            drawBorder(e);
        }

        private void drawBorder(PaintEventArgs e)
        {
            Color _lineColor = Color.FromArgb(0, 123, 255);
            ControlPaint.DrawBorder(e.Graphics, this.ClientRectangle,
            _lineColor, 1, ButtonBorderStyle.Solid, //左边
          _lineColor, 1, ButtonBorderStyle.Solid, //上边
          _lineColor, 1, ButtonBorderStyle.Solid, //右边
          _lineColor, 1, ButtonBorderStyle.Solid);//底边

        }

        /// <summary>
        /// 每页显示记录数更改事件
        /// </summary>
        bool isTextChanged = false;
        private void cbbPageSize_SelectedIndexChanged(object sender, EventArgs e)
        {
            int num = 0;
            if (!int.TryParse(cbbPageSize.Text.Trim(), out num) || num <= 0)
            {
                num = 10;
                cbbPageSize.Text = "10";
            }
            else
            {
                isTextChanged = true;
            }
            pageSize = num;
            if (isTextChanged)
            {
                isTextChanged = false;
                linkFirst_LinkClicked(null, null);
            }
        }

    }
}