//=====================================================================
/// <summary>
/// This is used to clone the column.
/// </summary>
/// <returns>A clone of the column</returns>
public override object Clone()
{
MultiColumnComboBoxColumn clone = (MultiColumnComboBoxColumn)base.Clone();
clone.ColumnHeadersVisible = this.ColumnHeadersVisible;
clone.RowHeadersVisible = this.RowHeadersVisible;
clone.DefaultNullText = this.DefaultNullText;
if (this.ColumnFilter.Count != 0)
{
clone.ColumnFilter.AddRange(this.ColumnFilter);
}
return(clone);
}
/// <summary>
/// This initializes the control used to edit the cell
/// </summary>
/// <param name="rowIndex">The zero-based row index of the cell's location.</param>
/// <param name="initialFormattedValue">An object that represents the value displayed by the cell when
/// editing is started.</param>
/// <param name="dataGridViewCellStyle">The cell style.</param>
public override void InitializeEditingControl(int rowIndex, object initialFormattedValue,
DataGridViewCellStyle dataGridViewCellStyle)
{
MultiColumnComboBoxColumn owner = (MultiColumnComboBoxColumn)base.OwningColumn;
MultiColumnComboBoxEditingControl box;
string text;
if (dataGridViewCellStyle == null)
{
throw new ArgumentNullException("dataGridViewCellStyle");
}
base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);
box = base.DataGridView.EditingControl as MultiColumnComboBoxEditingControl;
if (box != null)
{
if ((base.GetInheritedState(rowIndex) & DataGridViewElementStates.Selected) ==
DataGridViewElementStates.Selected)
{
base.DataGridView.EditingPanel.BackColor = dataGridViewCellStyle.SelectionBackColor;
}
box.DropDownStyle = ComboBoxStyle.DropDownList;
box.MaxDropDownItems = base.MaxDropDownItems;
box.DropDownWidth = dropDownWidth;
box.DataSource = null;
box.DisplayMember = box.ValueMember = null;
box.ColumnFilter.Clear();
box.Items.Clear();
// The default selection, format, and column filter values are stored at the column level
box.EnforceDefaultSelection = owner.EnforceDefaultSelection;
box.DefaultSelection = owner.DefaultSelection;
box.DropDownFormat.ColumnHeadersVisible = owner.ColumnHeadersVisible;
box.DropDownFormat.RowHeadersVisible = owner.RowHeadersVisible;
box.DropDownFormat.DefaultNullText = owner.DefaultNullText;
StringCollection columnFilter = owner.ColumnFilter;
if (columnFilter.Count != 0)
{
box.ColumnFilter.AddRange(columnFilter);
}
box.DisplayMember = base.DisplayMember;
box.ValueMember = base.ValueMember;
box.DataSource = base.DataSource;
if (base.HasItemCollection && base.DataSource == null && base.Items.Count > 0)
{
box.Items.AddRange(base.Items.InnerList.ToArray());
}
box.SortOrder = base.SortOrder;
box.FlatStyle = base.FlatStyle;
text = initialFormattedValue as string;
if (text == null)
{
text = String.Empty;
}
box.Text = text;
if (box.SelectedIndex == -1 && box.Items.Count != 0)
{
box.SelectedIndex = 0;
}
base.EditingComboBox = box;
// If the height is greater than the standard control, erase the area below it
if (base.OwningRow.Height > 21)
{
Rectangle rc = base.DataGridView.GetCellDisplayRectangle(base.ColumnIndex, rowIndex, true);
rc.Y += 21;
rc.Height -= 21;
base.DataGridView.Invalidate(rc);
}
}
}
