// Static Create method called by the event tracker system
// WinEvents are one throwns because items exist. so it makes sense to create the item and
// check for details afterward.
internal static void RaiseEvents(IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
// NOTE: List may be a portion of the Combobox
// Use WindowsListBox.Create in order to set-up a correct parenthood chain
switch (idObject)
{
case NativeMethods.OBJID_WINDOW:
RaiseEventsOnWindow(hwnd, eventId, idProp, idObject, idChild);
break;
case NativeMethods.OBJID_CLIENT:
RaiseEventsOnClient(hwnd, eventId, idProp, idObject, idChild);
break;
case NativeMethods.OBJID_VSCROLL:
case NativeMethods.OBJID_HSCROLL:
break;
default:
ProxySimple el = (ProxyHwnd)WindowsListBox.Create(hwnd, 0);
if (el != null)
{
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
break;
}
}
private static void RaiseEventsOnClient(IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
if (Misc.GetClassName(hwnd) == "ComboLBox")
{
ProxySimple el = (ProxySimple)WindowsListBox.Create(hwnd, idChild);
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));
}
}
internal override void AdviseEventRemoved(AutomationEvent eventId, AutomationProperty [] aidProps)
{
// remove combo-related events
base.AdviseEventRemoved(eventId, aidProps);
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (GetComboInfo(_hwnd, ref cbInfo))
{
// remove edit and list specific events that got remapped into combo's events
if (eventId == AutomationElement.AutomationPropertyChangedEvent)
{
// ComboBoxEx32 controls with the style CBS_DROPDOWNLIST are still editable.
if (cbInfo.hwndItem != IntPtr.Zero && IsEditableCombo())
{
// un-subscribe from edit-specific notifications
// ValueAsString, ValueAsObject, IsReadOnly
// create array containing events from which user wants to unsubscribe
WinEventTracker.EvtIdProperty [] editPortionEvents;
int counter;
CreateEditPortionEvents(out editPortionEvents, out counter, aidProps);
if (counter > 0)
{
WinEventTracker.RemoveToNotificationList(cbInfo.hwndItem, editPortionEvents, null, counter);
}
}
}
// Need to also remove the advise from the list portions of the combobox.
if (cbInfo.hwndList != IntPtr.Zero)
{
WindowsListBox listbox = new WindowsListBox(cbInfo.hwndList, this, 0, true);
listbox.AdviseEventRemoved(eventId, aidProps);
}
}
}
// override the default implementation so we can handle the WinEvents that are send to the edit
// portion of ComboBox (Combo proxy will hide edit portion from the user, but will take care of all
// the features/functionality that Edit presents) and some(show, hide) events that are send to the List portion of combo
// In both cases this events will be presented to the user as Combo's LE events
internal override void AdviseEventAdded(AutomationEvent eventId, AutomationProperty [] aidProps)
{
// call the base class implementation first to add combo-specific things and register combo specific callback
base.AdviseEventAdded(eventId, aidProps);
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (GetComboInfo(_hwnd, ref cbInfo))
{
if (eventId == AutomationElement.AutomationPropertyChangedEvent)
{
// ComboBoxEx32 controls with the style CBS_DROPDOWNLIST are still editable.
if (cbInfo.hwndItem != IntPtr.Zero && IsEditableCombo())
{
// subscribe to edit-specific notifications, that would be presented as combo le event
// ValueAsString, ValueAsObject, IsReadOnly
// create array containing events that user is interested in
WinEventTracker.EvtIdProperty [] editPortionEvents;
int counter;
CreateEditPortionEvents(out editPortionEvents, out counter, aidProps);
if (counter > 0)
{
WinEventTracker.AddToNotificationList(cbInfo.hwndItem, new WinEventTracker.ProxyRaiseEvents(EditPortionEvents), editPortionEvents, counter);
}
}
}
// Need to also advise the list portions of the combobox so that it can raise events.
if (cbInfo.hwndList != IntPtr.Zero)
{
WindowsListBox listbox = new WindowsListBox(cbInfo.hwndList, this, 0, true);
listbox.AdviseEventAdded(eventId, aidProps);
}
}
}
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);
}
}
internal override void AdviseEventRemoved (AutomationEvent eventId, AutomationProperty [] aidProps)
{
// remove combo-related events
base.AdviseEventRemoved (eventId, aidProps);
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (GetComboInfo(_hwnd, ref cbInfo))
{
// remove edit and list specific events that got remapped into combo's events
if (eventId == AutomationElement.AutomationPropertyChangedEvent)
{
// ComboBoxEx32 controls with the style CBS_DROPDOWNLIST are still editable.
if (cbInfo.hwndItem != IntPtr.Zero && IsEditableCombo())
{
// un-subscribe from edit-specific notifications
// ValueAsString, ValueAsObject, IsReadOnly
// create array containing events from which user wants to unsubscribe
WinEventTracker.EvtIdProperty [] editPortionEvents;
int counter;
CreateEditPortionEvents (out editPortionEvents, out counter, aidProps);
if ( counter > 0 )
{
WinEventTracker.RemoveToNotificationList( cbInfo.hwndItem, editPortionEvents, null, counter );
}
}
}
// Need to also remove the advise from the list portions of the combobox.
if (cbInfo.hwndList != IntPtr.Zero)
{
WindowsListBox listbox = new WindowsListBox(cbInfo.hwndList, this, 0, true);
listbox.AdviseEventRemoved(eventId, aidProps);
}
}
}
// override the default implementation so we can handle the WinEvents that are send to the edit
// portion of ComboBox (Combo proxy will hide edit portion from the user, but will take care of all
// the features/functionality that Edit presents) and some(show, hide) events that are send to the List portion of combo
// In both cases this events will be presented to the user as Combo's LE events
internal override void AdviseEventAdded (AutomationEvent eventId, AutomationProperty [] aidProps)
{
// call the base class implementation first to add combo-specific things and register combo specific callback
base.AdviseEventAdded (eventId, aidProps);
NativeMethods.COMBOBOXINFO cbInfo = new NativeMethods.COMBOBOXINFO(NativeMethods.comboboxInfoSize);
if (GetComboInfo(_hwnd, ref cbInfo))
{
if (eventId == AutomationElement.AutomationPropertyChangedEvent)
{
// ComboBoxEx32 controls with the style CBS_DROPDOWNLIST are still editable.
if (cbInfo.hwndItem != IntPtr.Zero && IsEditableCombo())
{
// subscribe to edit-specific notifications, that would be presented as combo le event
// ValueAsString, ValueAsObject, IsReadOnly
// create array containing events that user is interested in
WinEventTracker.EvtIdProperty [] editPortionEvents;
int counter;
CreateEditPortionEvents (out editPortionEvents, out counter, aidProps);
if ( counter > 0 )
{
WinEventTracker.AddToNotificationList( cbInfo.hwndItem, new WinEventTracker.ProxyRaiseEvents( EditPortionEvents ), editPortionEvents, counter );
}
}
}
// Need to also advise the list portions of the combobox so that it can raise events.
if (cbInfo.hwndList != IntPtr.Zero)
{
WindowsListBox listbox = new WindowsListBox(cbInfo.hwndList, this, 0, true);
listbox.AdviseEventAdded(eventId, aidProps);
}
}
}
private static void RaiseEventsOnScroll(IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
if ((idProp == ScrollPattern.VerticalScrollPercentProperty && idObject != NativeMethods.OBJID_VSCROLL) ||
(idProp == ScrollPattern.HorizontalScrollPercentProperty && idObject != NativeMethods.OBJID_HSCROLL))
{
return;
}
ProxyFragment el = new NonClientArea(hwnd);
if (el == null)
{
return;
}
if (idProp == InvokePattern.InvokedEvent)
{
NonClientItem item = idObject == NativeMethods.OBJID_HSCROLL ? NonClientItem.HScrollBar : NonClientItem.VScrollBar;
int sbFlag = idObject == NativeMethods.OBJID_HSCROLL ? NativeMethods.SB_HORZ : NativeMethods.SB_VERT;
ProxyFragment scrollBar = new WindowsScrollBar(hwnd, el, (int)item, sbFlag);
if (scrollBar != null)
{
ProxySimple scrollBarBit = WindowsScrollBarBits.CreateFromChildId(hwnd, scrollBar, idChild, sbFlag);
if (scrollBarBit != null)
{
scrollBarBit.DispatchEvents(eventId, idProp, idObject, idChild);
}
}
return;
}
if (eventId == NativeMethods.EventObjectStateChange && idProp == ValuePattern.IsReadOnlyProperty)
{
if (idChild == 0)
{
//
if (idObject == NativeMethods.OBJID_HSCROLL || idObject == NativeMethods.OBJID_VSCROLL)
{
idObject = NativeMethods.OBJID_WINDOW;
}
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
return;
}
if (idProp == ValuePattern.ValueProperty && eventId == NativeMethods.EVENT_OBJECT_VALUECHANGE)
{
NonClientItem item = idObject == NativeMethods.OBJID_HSCROLL ? NonClientItem.HScrollBar : NonClientItem.VScrollBar;
WindowsScrollBar scrollBar = new WindowsScrollBar(hwnd, el, (int)item, idObject == NativeMethods.OBJID_HSCROLL ? NativeMethods.SB_HORZ : NativeMethods.SB_VERT);
scrollBar.DispatchEvents(0, ValuePattern.ValueProperty, NativeMethods.OBJID_CLIENT, 0);
return;
}
if (Misc.GetClassName(hwnd) == "ComboLBox")
{
el = (ProxyFragment)WindowsListBox.Create(hwnd, 0);
}
if (el != null)
{
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
}
private static void RaiseEventsOnScroll(IntPtr hwnd, int eventId, object idProp, int idObject, int idChild)
{
if ((idProp == ScrollPattern.VerticalScrollPercentProperty && idObject != NativeMethods.OBJID_VSCROLL) ||
(idProp == ScrollPattern.HorizontalScrollPercentProperty && idObject != NativeMethods.OBJID_HSCROLL))
{
return;
}
ProxyFragment el = new NonClientArea(hwnd);
if (el == null)
{
return;
}
if (idProp == InvokePattern.InvokedEvent)
{
NonClientItem item = idObject == NativeMethods.OBJID_HSCROLL ? NonClientItem.HScrollBar : NonClientItem.VScrollBar;
int sbFlag = idObject == NativeMethods.OBJID_HSCROLL ? NativeMethods.SB_HORZ : NativeMethods.SB_VERT;
ProxyFragment scrollBar = new WindowsScrollBar(hwnd, el, (int)item, sbFlag);
if (scrollBar != null)
{
ProxySimple scrollBarBit = WindowsScrollBarBits.CreateFromChildId(hwnd, scrollBar, idChild, sbFlag);
if (scrollBarBit != null)
{
scrollBarBit.DispatchEvents(eventId, idProp, idObject, idChild);
}
}
return;
}
if (eventId == NativeMethods.EventObjectStateChange && idProp == ValuePattern.IsReadOnlyProperty)
{
if (idChild == 0)
{
// This code is never exercised. The code in User needs to change to send
// EventObjectStateChange with a client ID of zero
//
// UIA works differently than MSAA. Events are set for elements rather than hwnd
// Scroll bar are processed the same way whatever they are part of the non client area
// or stand alone hwnd. OBJID_HSCROLL and OBJID_VSCROLL are mapped to OBJID_WINDOW
// so they behave the same for NC and hwnd SB.
// Parameters are setup so that the dispatch will send the proper notification and
// recursively will send notifications to all of the children
if (idObject == NativeMethods.OBJID_HSCROLL || idObject == NativeMethods.OBJID_VSCROLL)
{
idObject = NativeMethods.OBJID_WINDOW;
}
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
return;
}
if (idProp == ValuePattern.ValueProperty && eventId == NativeMethods.EVENT_OBJECT_VALUECHANGE)
{
NonClientItem item = idObject == NativeMethods.OBJID_HSCROLL ? NonClientItem.HScrollBar : NonClientItem.VScrollBar;
WindowsScrollBar scrollBar = new WindowsScrollBar(hwnd, el, (int)item, idObject == NativeMethods.OBJID_HSCROLL ? NativeMethods.SB_HORZ : NativeMethods.SB_VERT);
scrollBar.DispatchEvents(0, ValuePattern.ValueProperty, NativeMethods.OBJID_CLIENT, 0);
return;
}
if (Misc.GetClassName(hwnd) == "ComboLBox")
{
el = (ProxyFragment)WindowsListBox.Create(hwnd, 0);
}
if (el != null)
{
el.DispatchEvents(eventId, idProp, idObject, idChild);
}
}
