public override AccessibleObject Navigate(AccessibleNavigation navdir)
{
try {
object o = acc.accNavigate((int)navdir, this.id);
return(Wrap(o));
} catch (Exception) {
return(null);
}
}
// InitializeLifetimeService not delgated.
/// <summary>
/// Move in various directions from the recipient.
/// </summary>
/// <param name="navdir"></param>
/// <returns></returns>
public override AccessibleObject Navigate(AccessibleNavigation navdir)
{
IAccessible acc = (IAccessible)(m_acc.accNavigate((int)navdir, null));
if (acc == null)
{
return(null);
}
if (acc == m_acc) // probably unlikely...
{
return(this);
}
return(new AccessibleObjectFromIAccessible(acc));
}
public static IEnumerable <IAccessible> GetChildren(IAccessible parent)
{
var children = new object[parent.accChildCount];
var result = AccessibleChildren(parent, 0, children.Length, children, out var count);
if (result != 0 && result != 1)
{
return(Enumerable.Empty <IAccessible>());
}
if (count == 1 && children[0] is int)
{
if (!(parent.accNavigate(NAVDIR_FIRSTCHILD, 0) is IAccessible child))
{
return(Enumerable.Empty <IAccessible>());
}
return(new[] { child });
}
return(children.OfType <IAccessible>());
}
public static IEnumerable <IAccessible> GetChildren(IAccessible parent)
{
var children = new object[parent.accChildCount];
int count;
var result = AccessibleChildren(parent, 0, children.Length, children, out count);
if (result != 0 && result != 1)
{
return(new IAccessible[0]);
}
if (count == 1 && children[0] is int)
{
var child = parent.accNavigate(NAVDIR_FIRSTCHILD, 0) as IAccessible;
if (child == null)
{
return(new IAccessible[0]);
}
return(new[] { child });
}
return(children.OfType <IAccessible>());
}
object?IAccessibleInternal.accNavigate(int navDir, object childID) => AsNativeAccessible(publicIAccessible.accNavigate(navDir, childID));
object UnsafeNativeMethods.IAccessibleInternal.accNavigate(int navDir, object childID)
{
IntSecurity.UnmanagedCode.Assert();
return(AsNativeAccessible(publicIAccessible.accNavigate(navDir, childID)));
}
