//overridden to fire BoolChange event and Formatting event
protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowIndex, Brush backBrush, Brush foreBrush, bool alignToRight)
{
var colNum = DataGridTableStyle.GridColumnStyles.IndexOf(this);
//used to handle the boolchanging
ManageBoolValueChanging(rowIndex, colNum);
//fire formatting event
DataGridFormatCellEventArgs e = null;
var callBaseClass = true;
if (SetCellFormat != null)
{
e = new DataGridFormatCellEventArgs(rowIndex, colNum, GetColumnValueAtRow(source, rowIndex));
SetCellFormat(this, e);
if (e.BackBrush != null)
{
backBrush = e.BackBrush;
}
callBaseClass = e.UseBaseClassDrawing;
}
if (callBaseClass)
{
base.Paint(g, bounds, source, rowIndex, backBrush, new SolidBrush(Color.Red), alignToRight);
}
//clean up
if (e != null)
{
if (e.BackBrushDispose)
{
e.BackBrush.Dispose();
}
if (e.ForeBrushDispose)
{
e.ForeBrush.Dispose();
}
if (e.TextFontDispose)
{
e.TextFont.Dispose();
}
}
}
/// <summary>
/// used to fire an event to retrieve formatting info
/// and then draw the cell with this formatting info
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="source"></param>
/// <param name="rowIndex"></param>
/// <param name="backBrush"></param>
/// <param name="foreBrush"></param>
/// <param name="alignToRight"></param>
protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowIndex, Brush backBrush, Brush foreBrush, bool alignToRight)
{
DataGridFormatCellEventArgs e = null;
var callBaseClass = true;
//fire the formatting event
if (SetCellFormat != null)
{
var col = DataGridTableStyle.GridColumnStyles.IndexOf(this);
e = new DataGridFormatCellEventArgs(rowIndex, col, GetColumnValueAtRow(source, rowIndex));
SetCellFormat(this, e);
if (e.BackBrush != null)
{
backBrush = e.BackBrush;
}
//if these properties set, then must call drawstring
if (e.ForeBrush != null || e.TextFont != null)
{
if (e.ForeBrush == null)
{
e.ForeBrush = foreBrush;
}
if (e.TextFont == null)
{
e.TextFont = DataGridTableStyle.DataGrid.Font;
}
g.FillRectangle(backBrush, bounds);
var saveRegion = g.Clip;
var rect = new Rectangle(bounds.X, bounds.Y, bounds.Width, bounds.Height);
using (var newRegion = new Region(rect))
{
g.Clip = newRegion;
var charWidth = (int)Math.Ceiling(g.MeasureString("c", e.TextFont, 20, StringFormat.GenericTypographic).Width);
var s = GetColumnValueAtRow(source, rowIndex).ToString();
var maxChars = Math.Min(s.Length, (bounds.Width / charWidth));
try
{
g.DrawString(s.Substring(0, maxChars), e.TextFont, e.ForeBrush, bounds.X, bounds.Y + 2);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message.ToString());
} //empty catch
finally
{
g.Clip = saveRegion;
}
}
callBaseClass = false;
}
if (!e.UseBaseClassDrawing)
{
callBaseClass = false;
}
}
if (callBaseClass)
{
base.Paint(g, bounds, source, rowIndex, backBrush, foreBrush, alignToRight);
}
//clean up
if (e != null)
{
if (e.BackBrushDispose)
{
e.BackBrush.Dispose();
}
if (e.ForeBrushDispose)
{
e.ForeBrush.Dispose();
}
if (e.TextFontDispose)
{
e.TextFont.Dispose();
}
}
}
