using System;
using System.ComponentModel;
using System.Data;
using System.Drawing.Printing;

namespace Dongke.WinForm.Controls.InvoiceLayout
{
    internal partial class PaperAreaSetting : Setting
    {
        #region 成员变量
        private static DataTable _paperSizes;                        // 纸张尺寸一览
        private bool _isSizeChanged = false;
        private bool _allowChangeSize = false;
        private int _indexA4 = -1;
        #endregion 成员变量

        #region 属性
        /// <summary>
        /// 纸张的宽(mm)
        /// </summary>
        [DefaultValue(210)]
        public float PaperWidth
        {
            get
            {
                return System.Convert.ToSingle(numerWidth.Value);
            }
            set
            {
                decimal d = System.Convert.ToDecimal(value);
                if (d < numerWidth.Minimum)
                {
                    d = numerWidth.Minimum;
                }
                else if (numerWidth.Maximum < d)
                {
                    d = numerWidth.Maximum;
                }
                if (numerWidth.Value != d)
                {
                    _isSizeChanged = true;
                    numerWidth.Value = d;
                }
            }
        }

        /// <summary>
        /// 纸张的高(mm)
        /// </summary>
        [DefaultValue(297)]
        public float PaperHeight
        {
            get
            {
                return System.Convert.ToSingle(numerHeight.Value);
            }
            set
            {
                decimal d = System.Convert.ToDecimal(value);
                if (d < numerHeight.Minimum)
                {
                    d = numerHeight.Minimum;
                }
                else if (numerHeight.Maximum < d)
                {
                    d = numerHeight.Maximum;
                }
                if (numerHeight.Value != d)
                {
                    _isSizeChanged = true;
                    numerHeight.Value = d;
                }
            }
        }
        #endregion 属性

        #region 构造函数
        /// <summary>
        /// 构造函数
        /// </summary>
        public PaperAreaSetting()
        {
            InitializeComponent();
            dgrdPaperSize.AutoGenerateColumns = false;
            InitializePaperSize();
        }
        #endregion 构造函数

        #region 函数
        /// <summary>
        /// 纸张尺寸一览
        /// </summary>
        private void InitializePaperSize()
        {
            if (_paperSizes == null)
            {
                _paperSizes = new DataTable();
                _paperSizes.TableName = "PaperSizes";
                _paperSizes.Columns.Add("SizeName", typeof(string));
                _paperSizes.Columns.Add("Width", typeof(float));
                _paperSizes.Columns.Add("Height", typeof(float));
            }
            else
            {
                _paperSizes.Clear();
            }
            float height = 0;
            float width = 0;
            int index = 0;
            PrintDocument pd = new PrintDocument();
            foreach (PaperSize ps in pd.PrinterSettings.PaperSizes)
            {
                DataRow dr = _paperSizes.NewRow();
                height = LayoutCommon.Inch100ToMillimeter(ps.Height);
                width = LayoutCommon.Inch100ToMillimeter(ps.Width);
                dr[0] = string.Format("{0}  {1:0}mm×{2:0}mm",
                                    ps.PaperName,
                                    width,
                                    height);
                dr[1] = Math.Round(width);
                dr[2] = Math.Round(height);
                _paperSizes.Rows.Add(dr);
                if (ps.PaperName.StartsWith("A4")
                    && 210.0f.Equals(dr[1])
                    && 297.0f.Equals(dr[2])
                    && _indexA4 < 0)
                {
                    _indexA4 = index;
                }
                index++;
            }
            dgrdPaperSize.DataSource = _paperSizes;
        }
        #endregion 函数

        #region 事件处理
        /// <summary>
        /// shown
        /// </summary>
        /// <param name="sender">指定的对象</param>
        /// <param name="e">提供的事件数据</param>
        private void PaperAreaSetting_Shown(object sender, EventArgs e)
        {
            // 新建时选择A4纸张
            if (_isSizeChanged || _indexA4 < 0)
            {
                dgrdPaperSize.ClearSelection();
            }
            else
            {
                dgrdPaperSize.Focus();
                dgrdPaperSize.Rows[_indexA4].Selected = true;
                dgrdPaperSize.CurrentCell = dgrdPaperSize.Rows[_indexA4].Cells[0];
            }
            _allowChangeSize = true;
        }

        /// <summary>
        /// 【纸张尺寸一览】选择
        /// </summary>
        /// <param name="sender">指定的对象</param>
        /// <param name="e">提供的事件数据</param>
        private void dgrdPaperSize_Leave(object sender, EventArgs e)
        {
            dgrdPaperSize.ClearSelection();
        }

        /// <summary>
        /// 【纸张尺寸一览】选择
        /// </summary>
        /// <param name="sender">指定的对象</param>
        /// <param name="e">提供的事件数据</param>
        private void dgrdPaperSize_SelectionChanged(object sender, EventArgs e)
        {
            if (dgrdPaperSize.CurrentRow != null && _allowChangeSize
                && 0 < dgrdPaperSize.SelectedRows.Count)
            {
                PaperHeight =
                    System.Convert.ToSingle(dgrdPaperSize.CurrentRow.Cells["colHeight"].Value);
                PaperWidth =
                    System.Convert.ToSingle(dgrdPaperSize.CurrentRow.Cells["colWidth"].Value);
            }
        }
        #endregion 事件处理
    }
}