internal IEnumUnknown EnumControls(Control ctl, OLECONTF dwOleContF, GC_WCH dwWhich)
{
GetComponents();
LockComponents();
try
{
ArrayList l = null;
bool selected = (dwWhich & GC_WCH.FSELECTED) != 0;
bool reverse = (dwWhich & GC_WCH.FREVERSEDIR) != 0;
// Note that visual basic actually ignores the next/prev flags... we will not
bool onlyNext = (dwWhich & GC_WCH.FONLYNEXT) != 0;
bool onlyPrev = (dwWhich & GC_WCH.FONLYPREV) != 0;
dwWhich &= ~(GC_WCH.FSELECTED | GC_WCH.FREVERSEDIR |
GC_WCH.FONLYNEXT | GC_WCH.FONLYPREV);
if (onlyNext && onlyPrev)
{
Debug.Fail("onlyNext && onlyPrev are both set!");
throw E_INVALIDARG;
}
if (dwWhich == GC_WCH.CONTAINER || dwWhich == GC_WCH.CONTAINED)
{
if (onlyNext || onlyPrev)
{
Debug.Fail("GC_WCH_FONLYNEXT or FONLYPREV used with CONTANER or CONATINED");
throw E_INVALIDARG;
}
}
int first = 0;
int last = -1; // meaning all
Control[] ctls = null;
switch (dwWhich)
{
default:
Debug.Fail("Bad GC_WCH");
throw E_INVALIDARG;
case GC_WCH.CONTAINED:
ctls = ctl.GetChildControlsInTabOrder(false);
ctl = null;
break;
case GC_WCH.SIBLING:
Control p = ctl.ParentInternal;
if (p != null)
{
ctls = p.GetChildControlsInTabOrder(false);
if (onlyPrev)
{
last = ctl.TabIndex;
}
else if (onlyNext)
{
first = ctl.TabIndex + 1;
}
}
else
{
ctls = Array.Empty <Control>();
}
ctl = null;
break;
case GC_WCH.CONTAINER:
l = new ArrayList();
MaybeAdd(l, ctl, selected, dwOleContF, false);
while (ctl != null)
{
AxContainer cont = FindContainerForControl(ctl);
if (cont != null)
{
MaybeAdd(l, cont.parent, selected, dwOleContF, true);
ctl = cont.parent;
}
else
{
break;
}
}
break;
case GC_WCH.ALL:
Hashtable htbl = GetComponents();
ctls = new Control[htbl.Keys.Count];
htbl.Keys.CopyTo(ctls, 0);
ctl = parent;
break;
}
if (l is null)
{
l = new ArrayList();
if (last == -1 && ctls != null)
{
last = ctls.Length;
}
if (ctl != null)
{
MaybeAdd(l, ctl, selected, dwOleContF, false);
}
for (int i = first; i < last; i++)
{
MaybeAdd(l, ctls[i], selected, dwOleContF, false);
}
}
object[] rval = new object[l.Count];
l.CopyTo(rval, 0);
if (reverse)
{
for (int i = 0, j = rval.Length - 1; i < j; i++, j--)
{
object temp = rval[i];
rval[i] = rval[j];
rval[j] = temp;
}
}
return(new EnumUnknown(rval));
}
finally
{
UnlockComponents();
}
}
unsafe HRESULT IVBGetControl.EnumControls(OLECONTF dwOleContF, GC_WCH dwWhich, out IEnumUnknown ppenum)
{
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, "in EnumControls");
ppenum = host.GetParentContainer().EnumControls(host, dwOleContF, dwWhich);
return(HRESULT.S_OK);
}
