/// <summary>
/// Displays the drop-down filter list.
/// </summary>
override public void ShowColumnFilter()
{
try
{
if (filterControlShowing)
{
HideFilterControl();
return;
}
// Cast the data source to a BindingSource.
BindingSource data = this.DataGridView.DataSource as BindingSource;
Debug.Assert((data != null && data.SupportsFiltering && OwningColumn != null) || (Retriever != null),
"DataSource is not a BindingSource, or does not support filtering, or OwningColumn is null");
if (data != null)
{
throw new NotImplementedException();
}
Debug.Assert(this.DataGridView != null, "DataGridView is null");
// Ensure that the current row is not the row for new records.
// This prevents the new row from affecting the filter list and also
// prevents the new row from being added when the filter changes.
if (this.DataGridView.CurrentRow != null &&
this.DataGridView.CurrentRow.IsNewRow)
{
this.DataGridView.CurrentCell = null;
}
if (filterWindow != null)
{
this.DataGridView.Controls.Remove(filterWindow);
filterWindow.Dispose();
}
filterWindow = new DateTimeHeader();
// Add handlers to dropDownListBox.FilterListBox events.
HandleDropDownListBoxEvents();
//textSelectBox.Visible = true;
filterControlShowing = true;
filterWindow.Show(this.DataGridView, m_dtpBefore, m_dtpAfter);
// Set the size and location of dropDownListBox, then display it.
SetDropDownListBoxBounds();
// Invalidate the cell so that the drop-down button will repaint
// in the pressed state.
this.DataGridView.InvalidateCell(this);
}
catch (Exception ex)
{
CErr.processError(ex, "Error while showing the column filter setting (" + this.OwningColumn.Name + ")");
}
}
/// <summary>
/// Hides the drop-down filter list.
/// </summary>
override protected void HideFilterControl()
{
if (filterControlShowing)
{
filterControlShowing = false;
Debug.Assert(this.DataGridView != null, "DataGridView is null");
// Hide dropDownListBox.FilterListBox, remove handlers from its events, and remove
// it from the DataGridView control.
UnhandleDropDownListBoxEvents();
filterWindow.Visible = false;
filterWindow.Dispose();
filterWindow = null;
//this.DataGridView.Controls.Remove(multiSelectBox);
// Invalidate the cell so that the drop-down button will repaint
// in the unpressed state.
this.DataGridView.InvalidateCell(this);
this.DataGridView.Focus();
}
}
