private void btnDropDown_Click(object sender, EventArgs e)
{
if (_Service == null)
{
_Service = new DropDownService(this);
}
buildColumns();
ChooserDropDown ctl = NewChooserDropDown();
ctl.CloseByDoubleClick = CloseDropDownByDoubleClick;
ctl.DataSource = SetClass;
if (SetClass != null)
{
if (SetClass.Count == 0)
{
SetClass.Load();
}
SetClass.FilterApply(((Value == null) ? txtMain.Text : ""), ctl.GetColumnDescriptors());
}
ctl.Value = Value;
_Service.DropDownControl(ctl);
}
public void DropDownControl(Control ctl)
{
DropDownCtl = (ChooserDropDown)ctl;
if (editor.CanCall)
{
DropDownCtl.ValueOpenForm += new ValueEventHandler(DropDownService_ValueOpenForm);
}
if (dropDownForm == null)
{
dropDownForm = new DropDownForm(this);
}
dropDownForm.TopMost = true;
dropDownForm.Visible = false;
dropDownForm.Component = DropDownCtl;
Size size = new Size(editor.DropDownWidth, editor.DropDownHeight);
Point location = new Point(editor.Left, editor.Bottom);
if (editor.DropDownAlign == CtlChooser.DropDownAlignment.Right)
{
location.X = editor.Right - size.Width - 1;
}
// location in screen coordinate
location = editor.Parent.PointToScreen(location);
// check the form is in the screen working area
Rectangle screenWorkingArea = Screen.FromControl(editor).WorkingArea;
location.X = Math.Min(screenWorkingArea.Right - size.Width,
Math.Max(screenWorkingArea.X, location.X));
if (size.Height + location.Y + editor.Height > screenWorkingArea.Bottom)
{
location.Y = location.Y - size.Height - editor.Height - 1;
}
dropDownForm.FormBorderStyle = FormBorderStyle.FixedSingle;
dropDownForm.SetBounds(location.X, location.Y, size.Width, size.Height);
dropDownForm.MinimumSize = size;
dropDownForm.Size = size;
dropDownForm.Visible = true;
DropDownCtl.Focus();
DropDownCtl.ValueSelected -= new ValueEventHandler(ctl_ValueSelected);
DropDownCtl.ValueSelected += new ValueEventHandler(ctl_ValueSelected);
DropDownCtl.ValueEscaped -= new EventHandler(DropDownService_ValueEscaped);
DropDownCtl.ValueEscaped += new EventHandler(DropDownService_ValueEscaped);
//editor.SelectTextBox();
// wait for the end of the editing
//while (dropDownForm.Visible)
//{
// Application.DoEvents();
// MsgWaitForMultipleObjects(0, 0, true, 250, 255);
//}
// editing is done or aborted
}