internal static IRawElementProviderSimple Create(IntPtr hwnd, int idChild)
{
bool parentedByCombo = false;
ProxyFragment parent = null;
int item = 0;
try
{
int style = Misc.GetWindowStyle(hwnd);
// If can not get windows style the hwnd is bad so do not create a proxy for it.
if (style == 0)
{
return(null);
}
if (Misc.IsBitSet(style, NativeMethods.LBS_COMBOBOX))
{
// List portion of combo box
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (WindowsComboBox.GetComboInfo(hwnd, ref cbInfo) && (cbInfo.hwndCombo != IntPtr.Zero))
{
parent = (ProxyFragment)WindowsComboBox.Create(cbInfo.hwndCombo, 0);
parentedByCombo = true;
item = (int)WindowsComboBox.ComboChildren.List;
}
}
}
catch (ElementNotAvailableException)
{
return(null);
}
WindowsListBox listbox = new WindowsListBox(hwnd, parent, item, parentedByCombo);
if (idChild == 0)
{
return(listbox);
}
else
{
return(listbox.CreateListboxItem(idChild - 1));
}
}
private static void RaiseEventsOnClient(IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
ProxySimple el = null;
WindowsListBox wlb = (WindowsListBox)WindowsListBox.Create(hwnd, 0);
// Upon creation, a single selection Listbox can have no selection to start with
// however once an item has been selection, the selection cannot be removed.
// This WinEvent can only be received once, on the first selection.
// Once the notification is received the notification handler is removed to not get it a
// second time.
if ((eventId == NativeMethods.EventObjectSelection || eventId == NativeMethods.EventObjectSelectionAdd) && (idProp as AutomationProperty) == SelectionPattern.IsSelectionRequiredProperty)
{
// This array must be kept in sync with the array in PropertyToWinEvent
WinEventTracker.EvtIdProperty[] aEvtIdProperties = new WinEventTracker.EvtIdProperty[] { new WinEventTracker.EvtIdProperty(NativeMethods.EventObjectSelection, SelectionPattern.IsSelectionRequiredProperty) };
WinEventTracker.RemoveToNotificationList(hwnd, aEvtIdProperties, null, aEvtIdProperties.Length);
el = wlb;
}
else if (eventId == NativeMethods.EventObjectSelection || eventId == NativeMethods.EventObjectSelectionRemove || eventId == NativeMethods.EventObjectSelectionAdd)
{
bool isMultipleSelection = wlb.IsMultipleSelection();
// User should send SelectionAdd for a Multiselect listbox but it sends instead
// Selection. The code below fixes the
if (eventId == NativeMethods.EventObjectSelection && isMultipleSelection && wlb.HasOtherSelections(idChild - 1))
{
eventId = NativeMethods.EventObjectSelectionAdd;
}
// The spec says a ElementSelectionEvent should be fired when action causes only one
// selection.
if ((eventId == NativeMethods.EventObjectSelectionRemove || eventId == NativeMethods.EventObjectSelectionAdd) &&
isMultipleSelection && wlb.GetSelectionCount() == 1)
{
// The net result of the user action is that there is only one item selected in the
// listbox, so change the event to an EventObjectSelected.
idProp = SelectionItemPattern.ElementSelectedEvent;
eventId = NativeMethods.EventObjectSelection;
// Now need to find what item is selected.
int selection = wlb.GetOtherSelection(idChild - 1);
if (selection != NativeMethods.LB_ERR)
{
idChild = selection;
}
}
el = wlb.CreateListboxItem(idChild - 1);
}
else
{
el = wlb;
}
// Special case for logical element change for listbox item
if ((idProp as AutomationEvent) == AutomationElement.StructureChangedEvent &&
(eventId == NativeMethods.EventObjectDestroy || eventId == NativeMethods.EventObjectCreate))
{
// Since children are referenced by position in the tree, addition and removal
// of items leads to different results when asking properties for the same element
// On removal, item + 1 is now item!
// Use Children Invalidated to let the client knows that all the cached
AutomationInteropProvider.RaiseStructureChangedEvent(wlb, new StructureChangedEventArgs(StructureChangeType.ChildrenInvalidated, wlb.MakeRuntimeId()));
return;
}
if (el != null)
{
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
}
internal static IRawElementProviderSimple Create(IntPtr hwnd, int idChild)
{
bool parentedByCombo = false;
ProxyFragment parent = null;
int item = 0;
try
{
int style = Misc.GetWindowStyle(hwnd);
// If can not get windows style the hwnd is bad so do not create a proxy for it.
if (style == 0)
{
return null;
}
if (Misc.IsBitSet(style, NativeMethods.LBS_COMBOBOX))
{
// List portion of combo box
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (WindowsComboBox.GetComboInfo(hwnd, ref cbInfo) && (cbInfo.hwndCombo != IntPtr.Zero))
{
parent = (ProxyFragment)WindowsComboBox.Create(cbInfo.hwndCombo, 0);
parentedByCombo = true;
item = (int)WindowsComboBox.ComboChildren.List;
}
}
}
catch (ElementNotAvailableException)
{
return null;
}
WindowsListBox listbox = new WindowsListBox (hwnd, parent, item, parentedByCombo);
if (idChild == 0)
{
return listbox;
}
else
{
return listbox.CreateListboxItem(idChild - 1);
}
}