/// <summary>
/// We make our DropDownForm host the choosen control and show it instead
/// of the dropdown portion of the ComboBox.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Combo_DropDown(object sender, EventArgs e)
{
if (!_dropDownHelper.DropDownShowing)
{
DropDownForm dropDown = new DropDownForm(_dropDownControl);
dropDown.FinishEditing += new DropDownValueChangedEventHandler(DropDown_FinishEditing);
dropDown.ValueChanged += new DropDownValueChangedEventHandler(DropDown_ValueChanged);
combo.DroppedDown = false;
_dropDownHelper.ShowDropDown(_owner, dropDown, GetDropDownPosition(dropDown));
}
else
{
_dropDownHelper.CloseDropDown();
this.Focus();
}
}
protected virtual void OnDropDownCancel(DropDownCancelEventArgs e)
{
if (this.DropDownCancel != null)
{
this.DropDownCancel(this, e);
}
if (!e.Cancel)
{
_owner.CloseDropDown();
_dropDown = null; // Clear reference for GC
}
}