void ShowTipInfoWindow(TextEditor editor, TooltipInformationWindow tipWindow, TooltipItem item, Xwt.ModifierKeys modifierState, int mouseX, int mouseY)
{
Gtk.Widget editorWidget = editor;
var startLoc = editor.OffsetToLocation(item.Offset);
var endLoc = editor.OffsetToLocation(item.EndOffset);
var p1 = editor.LocationToPoint(startLoc);
var p2 = editor.LocationToPoint(endLoc);
int w = (int)(p2.X - p1.X);
var caret = new Gdk.Rectangle(
(int)p1.X,
(int)p1.Y,
(int)w,
(int)editor.GetLineHeight(startLoc.Line)
);
tipWindow.ShowPopup(editorWidget, caret, PopupPosition.Top);
}