using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace CControlLibrary.ColumnsClass
{
    public class ColumnDecimal : DataGridViewColumn
    {
        public ColumnDecimal()
            : base(new ColumnDecimalCell())
        {
        }

        public override DataGridViewCell CellTemplate
        {
            get
            {
                return base.CellTemplate;
            }
            set
            {
                // Ensure that the cell used for the template is a CalendarCell.
                if (value != null &&
                    !value.GetType().IsAssignableFrom(typeof(ColumnDecimalCell)))
                {
                    throw new InvalidCastException("Must be a ColumnDecimalCell");
                }
                base.CellTemplate = value;
            }
        }
    }

    public class ColumnDecimalCell : DataGridViewTextBoxCell
    {

        public ColumnDecimalCell()
            : base()
        {
            // Use the format.
            this.Style.Format = "N2";
        }

        public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
        {
            // Set the value of the editing control to the current cell value.
            base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);
            ColumnDecimalEditingControl ctl = DataGridView.EditingControl as ColumnDecimalEditingControl;
            // Use the default row value when Value property is null.
            if (this.Value == null)
            {
                ctl.Value = (decimal)this.DefaultNewRowValue;
            }
            else
            {
                ctl.Value = (decimal)this.Value;
            }
        }

        public override Type EditType
        {
            get
            {
                // Return the type of the editing control that CalendarCell uses.
                return typeof(ColumnDecimalEditingControl);
            }
        }

        public override Type ValueType
        {
            get
            {
                // Return the type of the value that CalendarCell contains.

                return typeof(decimal);
            }
        }

        public override object DefaultNewRowValue
        {
            get
            {
                // Use the current date and time as the default value.
                return (decimal)0.00;
            }
        }
    }

    class ColumnDecimalEditingControl : NumericUpDown, IDataGridViewEditingControl
    {
        DataGridView dataGridView;
        private bool valueChanged = false;
        int rowIndex;

        public ColumnDecimalEditingControl()
        {
            this.Maximum = (decimal)999999999999999999.99;
            this.Minimum = (decimal)-999999999999999999.99;
            //this.DecimalPlaces = 2;
            this.Enter += new System.EventHandler(this.Enter1);
        }


        public void Enter1(object sender, EventArgs e)
        {
          //  this.Select(0, this.Value.ToString().Length);
        }


        // Implements the IDataGridViewEditingControl.EditingControlFormattedValue 
        // property.
        public object EditingControlFormattedValue
        {
            get
            {
                if (this.Text == "")
                {
                    this.Value = 0;
                }
                return this.Value.ToString();
            }
            set
            {
                if (value is String)
                {
                    try
                    {
                        // This will throw an exception of the string is 
                        // null, empty, or not in the format of a date.
                        this.Value = Decimal.Parse((string)value);
                    }
                    catch
                    {
                        // In the case of an exception, just use the 
                        // default value so we're not left with a null
                        // value.
                        this.Value = (decimal)0.00;
                    }
                }
            }
        }

        // Implements the 
        // IDataGridViewEditingControl.GetEditingControlFormattedValue method.
        public object GetEditingControlFormattedValue(
            DataGridViewDataErrorContexts context)
        {
            return EditingControlFormattedValue;
        }

        // Implements the 
        // IDataGridViewEditingControl.ApplyCellStyleToEditingControl method.
        public void ApplyCellStyleToEditingControl(
            DataGridViewCellStyle dataGridViewCellStyle)
        {
            this.Font = dataGridViewCellStyle.Font;
        }

        // Implements the IDataGridViewEditingControl.EditingControlRowIndex 
        // property.
        public int EditingControlRowIndex
        {
            get
            {
                return rowIndex;
            }
            set
            {
                rowIndex = value;
            }
        }

        // Implements the IDataGridViewEditingControl.EditingControlWantsInputKey 
        // method.
        public bool EditingControlWantsInputKey(
            Keys key, bool dataGridViewWantsInputKey)
        {
            // Let the DateTimePicker handle the keys listed.
            switch (key & Keys.KeyCode)
            {
                case Keys.Left:
                case Keys.Up:
                case Keys.Down:
                case Keys.Right:
                case Keys.Home:
                case Keys.End:
                case Keys.PageDown:
                case Keys.PageUp:
                    return true;
                default:
                    return !dataGridViewWantsInputKey;
            }
        }

        // Implements the IDataGridViewEditingControl.PrepareEditingControlForEdit 
        // method.
        public void PrepareEditingControlForEdit(bool selectAll)
        {
            // No preparation needs to be done.
        }

        // Implements the IDataGridViewEditingControl
        // .RepositionEditingControlOnValueChange property.
        public bool RepositionEditingControlOnValueChange
        {
            get
            {
                return false;
            }
        }

        // Implements the IDataGridViewEditingControl
        // .EditingControlDataGridView property.
        public DataGridView EditingControlDataGridView
        {
            get
            {
                return dataGridView;
            }
            set
            {
                dataGridView = value;
            }
        }

        // Implements the IDataGridViewEditingControl
        // .EditingControlValueChanged property.
        public bool EditingControlValueChanged
        {
            get
            {
                return valueChanged;
            }
            set
            {
                valueChanged = value;
            }
        }

        // Implements the IDataGridViewEditingControl
        // .EditingPanelCursor property.
        public Cursor EditingPanelCursor
        {
            get
            {
                return base.Cursor;
            }
        }

        protected override void OnValueChanged(EventArgs eventargs)
        {
            // Notify the DataGridView that the contents of the cell
            // have changed.
            valueChanged = true;
            this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
            base.OnValueChanged(eventargs);
        }
    }
}