//------------------------------------------------------------------------------
// <copyright file="DataGridAddNewRow.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>                                                                
//------------------------------------------------------------------------------
 
namespace System.Windows.Forms {
    using System.Runtime.Remoting;
 
    using System.Diagnostics;
 
    using System;
    
    using System.Windows.Forms;
    using System.ComponentModel;
    using System.Drawing;
    using Microsoft.Win32;
 
    /// <devdoc>
    ///      This class fully encapsulates the painting logic for an addnew row
    ///      appearing in a DataGrid.
    /// </devdoc>
    internal class DataGridAddNewRow : DataGridRow {
 
        private bool dataBound = false;
 
        public DataGridAddNewRow(DataGrid dGrid, DataGridTableStyle gridTable, int rowNum)
            : base(dGrid, gridTable, rowNum) {
        }
 
        // =------------------------------------------------------------------
        // =        Methods
        // =------------------------------------------------------------------
 
        /// <devdoc>
        ///      Since the DataView does not return a valid DataRow for
        ///      a newly added row, the DataGrid sets this property to
        ///      true to signal that the AddNewRow can safely render
        ///      row contents and permit editing, etc because a DataRecord
        ///      exists in the cursor that created this row.
        /// </devdoc>
        public bool DataBound {
            get {
                return dataBound;
            }
            set {
                dataBound = value;
            }
        }
 
        public override void OnEdit() {
            if (!DataBound) {
                DataGrid.AddNewRow();
            }
        }
 
        public override void OnRowLeave() {
            if (DataBound)
                DataBound = false;
        }
 
        // the addNewRow has nothing to do with losing focus
        //
        internal override void LoseChildFocus(Rectangle rowHeader, bool alignToRight)
        {
        }
 
        // the newDataRow has nothing to do with TAB keys
        //
        internal override bool ProcessTabKey(Keys keyData, Rectangle rowHeaders, bool alignToRight)
        {
            return false;
        }
 
        /// <devdoc>
        ///      Paints the row.
        /// </devdoc>
        public override int Paint(Graphics g, Rectangle bounds, Rectangle trueRowBounds, int firstVisibleColumn, int columnCount)
        {
            return Paint(g, bounds, trueRowBounds, firstVisibleColumn, columnCount, false);
        }
 
        public override int Paint(Graphics g,
                                  Rectangle bounds,
                                  Rectangle trueRowBounds,
                                  int firstVisibleColumn,
                                  int columnCount,
                                  bool alignToRight) {
            Rectangle dataBounds = bounds;
            DataGridLineStyle gridStyle;
            if (this.dgTable.IsDefault)
                gridStyle = this.DataGrid.GridLineStyle;
            else
                gridStyle = this.dgTable.GridLineStyle;
            int bWidth = this.DataGrid == null ? 0 : gridStyle == DataGridLineStyle.Solid ? 1 : 0;
            dataBounds.Height -= bWidth;
            int cx = base.PaintData(g, dataBounds, firstVisibleColumn, columnCount, alignToRight);
 
            if (bWidth > 0)
                PaintBottomBorder(g, bounds, cx, bWidth, alignToRight);
            return cx;
        }
 
        protected override void PaintCellContents(Graphics g, Rectangle cellBounds, DataGridColumnStyle column,
                                                  Brush backBr, Brush foreBrush, bool alignToRight) {
            if (DataBound) {
                CurrencyManager listManager = DataGrid.ListManager;
                column.Paint(g, cellBounds, listManager, this.RowNumber, alignToRight);
            }
            else {
                base.PaintCellContents(g, cellBounds, column, backBr, foreBrush, alignToRight);
            }
        }
    }
}