private void ToggleState(CellMouseEventArgs e)
{
GroupRendererData data = this.GetGroupRendererData(e.Cell);
// Toggle the group state
data.Grouped = !data.Grouped;
Row r = e.Table.TableModel.Rows[e.Row];
r.ExpandSubRows = !r.ExpandSubRows;
}
/// <summary>
/// Gets the GroupRendererData specific data used by the Renderer from
/// the specified Cell
/// </summary>
/// <param name="cell">The Cell to get the GroupRendererData data for</param>
/// <returns>The GroupRendererData data for the specified Cell</returns>
protected GroupRendererData GetGroupRendererData(Cell cell)
{
object rendererData = this.GetRendererData(cell);
if (rendererData == null || !(rendererData is GroupRendererData))
{
rendererData = new GroupRendererData();
this.SetRendererData(cell, rendererData);
}
return((GroupRendererData)rendererData);
}
/// <summary>
/// Raises the Paint event
/// </summary>
/// <param name="e"></param>
protected override void OnPaint(PaintCellEventArgs e)
{
base.OnPaint(e);
// don't bother if the Cell is null
if (e.Cell == null)
{
return;
}
Rectangle checkRect = this.CalcCheckRect(this.LineAlignment, this.Alignment);
if (!this.IsSubRow(e.Cell))
{
// Draw nothing if this row has no child rows
if (e.Cell.Row.SubRows.Count > 0)
{
// This is a parent row - draw a + or - in a box
GroupRendererData data = this.GetGroupRendererData(e.Cell);
DrawBox(e.Graphics, this.LineColorPen, checkRect);
if (data.Grouped)
{
DrawCross(e.Graphics, Pens.Gray, checkRect);
}
else
{
DrawMinus(e.Graphics, Pens.Gray, checkRect);
DrawHalfLine2(e.Graphics, this.LineColorPen, checkRect);
}
}
}
else
{
// This is a subrow so either draw the end-line or the normal line
if (this.IsLastRow(e.Cell))
{
DrawEndLine2(e.Graphics, this.LineColorPen, checkRect);
}
else
{
DrawLine2(e.Graphics, this.LineColorPen, checkRect);
}
}
#region Draw text
if (this.drawText)
{
string text = e.Cell.Text;
if (text != null && text.Length != 0)
{
Rectangle textRect = this.ClientRectangle;
textRect.X += checkRect.Width + 1;
textRect.Width -= checkRect.Width + 1;
if (e.Enabled)
{
e.Graphics.DrawString(e.Cell.Text, this.Font, this.ForeBrush, textRect, this.StringFormat);
}
else
{
e.Graphics.DrawString(e.Cell.Text, this.Font, this.GrayTextBrush, textRect, this.StringFormat);
}
}
}
#endregion
}
