using System;

using System.Data;

using System.Drawing;

using System.Windows.Forms;

using Yanwen.Logistics.Business.Logics;

using Yanwen.Logistics.Business.Models.ExpressTransport;

using Yanwen.Logistics.Desktop.Extensions;

namespace Yanwen.Logistics.Desktop.Transport

{

    public partial class TransportLanshouForm : Form

    {

       public TransportLanshouForm()

        {

            InitializeComponent();

        }

        //显示行号

        private void gdvData_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)

        {

            var b = new SolidBrush(gdvData.RowHeadersDefaultCellStyle.ForeColor);

            e.Graphics.DrawString((e.RowIndex + ).ToString(System.Globalization.CultureInfo.CurrentUICulture), gdvData.DefaultCellStyle.Font, b, e.RowBounds.Location.X + , e.RowBounds.Location.Y + );

        }

private void TransportLanshouForm_Load(object sender, EventArgs e)

        {

            var ch = new DatagridviewCheckboxHeaderCell();

            ch.OnCheckBoxClicked += new DatagridviewcheckboxHeaderEventHander(ch_OnCheckBoxClicked);//关联单击事件

            var checkboxCol = this.gdvData.Columns[] as DataGridViewCheckBoxColumn;

            checkboxCol.HeaderCell = ch;

            checkboxCol.HeaderCell.Value = string.Empty;//消除列头checkbox旁出现的文字

        }

        /// <summary>

        /// 单击事件

        /// </summary>

        private void ch_OnCheckBoxClicked(object sender, DatagridviewCheckboxHeaderEventArgs e)

        {

            foreach (DataGridViewRow dgvRow in this.gdvData.Rows)

            {

                dgvRow.Cells[].Value = e.CheckedState;

            }

        }

    }

    //定义触发单击事件的委托

    public delegate void DatagridviewcheckboxHeaderEventHander(object sender, DatagridviewCheckboxHeaderEventArgs e);

    //定义包含列头checkbox选择状态的参数类

    public class DatagridviewCheckboxHeaderEventArgs : EventArgs

    {

        public DatagridviewCheckboxHeaderEventArgs()

        {

            CheckedState = false;

        }

        public bool CheckedState { get; set; }

    }

    //定义继承于DataGridViewColumnHeaderCell的类，用于绘制checkbox，定义checkbox鼠标单击事件

    class DatagridviewCheckboxHeaderCell : DataGridViewColumnHeaderCell

    {

        Point checkBoxLocation;

        Size checkBoxSize;

        bool _checked = false;

        Point _cellLocation = new Point();

        System.Windows.Forms.VisualStyles.CheckBoxState _cbState =

            System.Windows.Forms.VisualStyles.CheckBoxState.UncheckedNormal;

        public event DatagridviewcheckboxHeaderEventHander OnCheckBoxClicked;

        //绘制列头checkbox

        protected override void Paint(System.Drawing.Graphics graphics,

           System.Drawing.Rectangle clipBounds,

           System.Drawing.Rectangle cellBounds,

           int rowIndex,

           DataGridViewElementStates dataGridViewElementState,

           object value,

           object formattedValue,

           string errorText,

           DataGridViewCellStyle cellStyle,

           DataGridViewAdvancedBorderStyle advancedBorderStyle,

           DataGridViewPaintParts paintParts)

        {

            base.Paint(graphics, clipBounds, cellBounds, rowIndex,

                dataGridViewElementState, value,

                formattedValue, errorText, cellStyle,

                advancedBorderStyle, paintParts);

            Point p = new Point();

            Size s = CheckBoxRenderer.GetGlyphSize(graphics,

            System.Windows.Forms.VisualStyles.CheckBoxState.UncheckedNormal);

            p.X = cellBounds.Location.X +

                (cellBounds.Width / ) - (s.Width / ) - ;//列头checkbox的X坐标

            p.Y = cellBounds.Location.Y +

                (cellBounds.Height / ) - (s.Height / );//列头checkbox的Y坐标

            _cellLocation = cellBounds.Location;

            checkBoxLocation = p;

            checkBoxSize = s;

            if (_checked)

                _cbState = System.Windows.Forms.VisualStyles.

                    CheckBoxState.CheckedNormal;

            else

                _cbState = System.Windows.Forms.VisualStyles.

                    CheckBoxState.UncheckedNormal;

            CheckBoxRenderer.DrawCheckBox

            (graphics, checkBoxLocation, _cbState);

        }

        /// <summary>

        /// 点击列头checkbox单击事件

        /// </summary>

        protected override void OnMouseClick(DataGridViewCellMouseEventArgs e)

        {

            var p = new Point(e.X + _cellLocation.X, e.Y + _cellLocation.Y);

            if (p.X >= checkBoxLocation.X && p.X <= checkBoxLocation.X + checkBoxSize.Width

                && p.Y >= checkBoxLocation.Y && p.Y <= checkBoxLocation.Y + checkBoxSize.Height)

            {

                _checked = !_checked;

                //获取列头checkbox的选择状态

                var ex = new DatagridviewCheckboxHeaderEventArgs { CheckedState = _checked };

                var sender = new object();//此处不代表选择的列头checkbox，只是作为参数传递。应该列头checkbox是绘制出来的，无法获得它的实例

                if (OnCheckBoxClicked != null)

                {

                    OnCheckBoxClicked(sender, ex);//触发单击事件

                    this.DataGridView.InvalidateCell(this);

                }

            }

            base.OnMouseClick(e);

        }

    }

}