protected override void OnKeyDown(KeyEventArgs e)
{
ignoreFocusChange = true;
if (e.KeyCode == Keys.Return && Focused)
{
var args = new CancelEventArgs();
ValueEntered?.Invoke(this, args);
if (!args.Cancel)
{
ForeColor = SystemColors.ControlText;
focusControl.Focus(); //because Microsoft forgot to put in Unfocus() smh
suggestionsDropDown.Hide(); //because OnLostFocus won't get called
e.SuppressKeyPress = true;
}
else
{
ForeColor = Color.Red;
}
}
else
{
base.OnKeyDown(e);
}
ignoreFocusChange = false;
}
protected override void OnLostFocus(EventArgs e)
{
base.OnLostFocus(e);
if (ignoreFocusChange)
{
return;
}
Form parentForm = this.FindForm();
if (parentForm != null && parentForm.ContainsFocus) //another Control inside the parent form got focused, we can be very sure that this was intentional
{
var args = new CancelEventArgs();
ValueEntered?.Invoke(this, args);
if (args.Cancel)
{
ForeColor = Color.Red; //mark the value red to indicate it's invalid
}
else
{
ForeColor = SystemColors.ControlText;
}
}
suggestionsDropDown.Hide();
}
//--------------------------------------------------------------------------------------------------
void _OnSourceUpdated(object sender, DataTransferEventArgs eventArgs)
{
if (eventArgs.TargetObject == ValueEditBox)
{
IsInKeyboardMode = false;
ValueEntered?.Invoke(this, Value);
}
}
private void SuggestionsDropDown_ItemSelected(object sender, EventArgs e)
{
Text = suggestionsDropDown.SelectedSuggestion;
var args = new CancelEventArgs();
ValueEntered?.Invoke(this, args);
if (args.Cancel)
{
ForeColor = Color.Red; //mark the value red to indicate it's invalid
}
else
{
ForeColor = SystemColors.ControlText;
}
ignoreFocusChange = true;
focusControl.Focus(); //because Microsoft forgot to put in Unfocus() smh
suggestionsDropDown.Hide(); //because OnLostFocus won't get called
ignoreFocusChange = false;
}