bool IExtenderProvider.CanExtend(object extendee)
{
//find AutocompleteMenu with lowest hashcode
if (Container != null)
{
foreach (object comp in Container.Components)
{
if (comp is AutocompleteMenu)
{
if (comp.GetHashCode() < GetHashCode())
{
return(false);
}
}
}
}
//we are main autocomplete menu on form ...
//check extendee as TextBox
if (!(extendee is Control))
{
return(false);
}
var temp = TextBoxWrapper.Create(extendee as Control);
return(temp != null);
}
protected void OnWrapperNeeded(WrapperNeededEventArgs args)
{
if (WrapperNeeded != null)
{
WrapperNeeded(this, args);
}
if (args.Wrapper == null)
{
args.Wrapper = TextBoxWrapper.Create(args.TargetControl);
}
}
public static TextBoxWrapper Create(Control targetControl)
{
var result = new TextBoxWrapper(targetControl);
if (result.selectedText == null || result.selectionLength == null || result.selectionStart == null ||
result.getPositionFromCharIndex == null)
{
return(null);
}
return(result);
}