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);
}
/// <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();
}
}
}
/// <summary>
/// Create a tab scheme comparer that compares using the given scheme.
/// </summary>
/// <param name="scheme"></param>
public TabSchemeComparer(TabOrderManager.TabScheme scheme)
{
_comparisonScheme = scheme;
}
/// <summary>
/// Create a tab scheme comparer that compares using the given scheme.
/// </summary>
/// <param name="scheme"></param>
public TabSchemeComparer(TabOrderManager.TabScheme scheme)
{
_comparisonScheme = scheme;
}