private void TopLevelForm_Load(object sender, EventArgs e)
{
Form f = sender as Form;
Debug.Assert( f != null, "We should never wire up to anything that's not a form." );
TabOrderManager tom = new TabOrderManager( f );
// Add an override for everything with a tab scheme set EXCEPT for the form, which
// serves as the root of the whole process.
TabOrderManager.TabScheme formScheme = TabOrderManager.TabScheme.None;
IDictionaryEnumerator extendeeEnumerator = extendees.GetEnumerator();
while( extendeeEnumerator.MoveNext() )
{
Control c = (Control) extendeeEnumerator.Key;
TabOrderManager.TabScheme scheme = (TabOrderManager.TabScheme ) extendeeEnumerator.Value;
if( c == f )
{
formScheme = scheme;
}
else
{
tom.SetSchemeForControl( c, scheme );
}
}
tom.SetTabOrder( formScheme );
}
public void reArrangeTabOrder(Control form, int mode = 0)
{
TabOrderManager.TabScheme scheme;
if (mode == 0 )
{
scheme = TabOrderManager.TabScheme.DownFirst;
} else
{
scheme = TabOrderManager.TabScheme.AcrossFirst;
}
TabOrderManager tom = new TabOrderManager(form);
tom.SetTabOrder(scheme);
}
/// <summary>
/// Set the tab scheme to use on a given control
/// </summary>
/// <param name="c"></param>
/// <returns></returns>
public void SetTabScheme( Control c, TabOrderManager.TabScheme val )
{
if( val != TabOrderManager.TabScheme.None )
{
extendees[ c ] = val;
if( topLevelForm == null )
{
if( c.TopLevelControl != null )
{
// We're in luck.
// This is the form, or this control knows about it, so take the opportunity to grab it and wire up to its Load event.
topLevelForm = c.TopLevelControl as Form;
HookFormLoad();
}
else
{
// Set up to wait around until this control or one of its ancestors is added to the form's control hierarchy.
HookParentChangedEvents( c );
}
}
}
else if( extendees.Contains(c) )
{
extendees.Remove( c );
// If we no longer have any extendees, we don't need to be wired up to the form load event.
if( extendees.Count == 0 )
{
UnhookFormLoad();
}
}
}