/// <summary> Dispose by parent. </summary>
public virtual void DisposeByParent()
{
// Memory and resources, that are assigned to underlaying Athena widget's
// instance structure (and thereby owned there) are destroyed by XtDestroyWidget ().
// This typically inclused the GCs, pixmaps and local copies of strings.
// They are typically assigned during XtCreateWidget () or XtSetValues ().
if (_shell != IntPtr.Zero)
{
IntPtr display = Xtlib.XtDisplay(_shell);
if (_appIconPixMap != IntPtr.Zero)
{
X11lib.XFreePixmap(display, _appIconPixMap);
}
if (_appMaskPixMap != IntPtr.Zero)
{
X11lib.XFreePixmap(display, _appMaskPixMap);
}
Xtlib.XtDestroyWidget(_shell);
_shell = IntPtr.Zero;
}
}