// OnEventSystemMenuPopupStart - process an EventSystemMenuPopupStart WinEvent.
private void OnEventSystemMenuPopupStart(int eventId, IntPtr hwnd, int idObject, int idChild, uint eventTime)
{
Accessible acc = Accessible.Create(hwnd, idObject, idChild);
if (acc == null)
{
return;
}
HandleFocusChange(hwnd, acc, idObject, idChild, eventTime);
}
// OnEventObjectFocus - process an EventObjectFocus WinEvent.
private void OnEventObjectFocus(int eventId, IntPtr hwnd, int idObject, int idChild, uint eventTime)
{
Accessible acc = Accessible.Create(hwnd, idObject, idChild);
if (acc == null)
{
return;
}
// Keep track of last focused non-menu item, so we can restore focus when we leave menu mode
if (!_fInMenu)
{
_accLastBeforeMenu = acc;
_hwndLastBeforeMenu = hwnd;
_idLastObject = idObject;
_idLastChild = idChild;
}
HandleFocusChange(hwnd, acc, idObject, idChild, eventTime);
}
// OnEventSystemCaptureEnd - process an EventSystemCaptureEnd WinEvent.
private void OnEventSystemCaptureEnd(int eventId, IntPtr hwnd, int idObject, int idChild, uint eventTime)
{
// Deal only with Combolbox dropdowns...
if (Accessible.IsComboDropdown(hwnd))
{
SafeNativeMethods.GUITHREADINFO guiThreadInfo = new SafeNativeMethods.GUITHREADINFO();
if (!Misc.GetGUIThreadInfo(0, ref guiThreadInfo))
{
return;
}
Accessible acc = Accessible.Create(guiThreadInfo.hwndFocus, UnsafeNativeMethods.OBJID_CLIENT, 0);
if (acc == null)
{
return;
}
HandleFocusChange(hwnd, acc, idObject, idChild, eventTime);
}
}
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
// HandleFocusChange - Called when a WinEvent we're listening to indicates the
// focus has changed. This is where the callback to the client is queued.
private void HandleFocusChange(IntPtr hwnd, Accessible acc, int idObject, int idChild, uint eventTime)
{
// If there is an hwnd then notify of a focus change
if (hwnd != IntPtr.Zero)
{
Debug.Assert(acc != null, "HandleFocusChange got hwnd and null IAccessible");
// Create an event args and get the source logical element
AutomationFocusChangedEventArgs e = new InternalAutomationFocusChangedEventArgs(idObject, idChild, eventTime);
AutomationElement srcEl = GetFocusedElementFromWinEvent(hwnd, idObject, idChild);
if (srcEl == null)
{
// Don't raise focus change events for UI that is gone. This has been seen when toolbar menus are
// being manipulated (e.g. mnu.SubMenu("File").MenuItems("Close").Click() in MITA). We should be
// seeing another focus change soon and with that event we can re-establish focus.
return;
}
// Check that item is actually focused
// Don't do this for statics - the controls in the color picker are statics, and
// they get focus, but OLEACC assumes statics don't get focus, so never sets the
// focus bit. So, for now, assume statics that send focus do actually have focus.
if (!Accessible.IsStatic(hwnd) && !Accessible.IsComboDropdown(hwnd))
{
// instead of depending on oleacc to see if something has focus ask provider
if (!(bool)srcEl.GetCurrentPropertyValue(AutomationElement.HasKeyboardFocusProperty))
{
return;
}
}
// Do notifies
ClientEventManager.RaiseEventInThisClientOnly(AutomationElement.AutomationFocusChangedEvent, srcEl, e);
}
// Keep track of where we are right now (may be unknown/null)
_accCurrent = acc;
}
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
// HandleFocusChange - Called when a WinEvent we're listening to indicates the
// focus has changed. This is where the callback to the client is queued.
private void HandleFocusChange(IntPtr hwnd, Accessible acc, int idObject, int idChild, uint eventTime)
{
// If there is an hwnd then notify of a focus change
if (hwnd != IntPtr.Zero)
{
Debug.Assert(acc != null, "HandleFocusChange got hwnd and null IAccessible");
// Create an event args and get the source logical element
AutomationFocusChangedEventArgs e = new InternalAutomationFocusChangedEventArgs(idObject, idChild, eventTime);
AutomationElement srcEl = GetFocusedElementFromWinEvent(hwnd, idObject, idChild);
if (srcEl == null)
{
// Don't raise focus change events for UI that is gone. This has been seen when toolbar menus are
// being manipulated (e.g. mnu.SubMenu("File").MenuItems("Close").Click() in MITA). We should be
// seeing another focus change soon and with that event we can re-establish focus.
return;
}
// Check that item is actually focused
// Don't do this for statics - the controls in the color picker are statics, and
// they get focus, but OLEACC assumes statics don't get focus, so never sets the
// focus bit. So, for now, assume statics that send focus do actually have focus.
if (!Accessible.IsStatic(hwnd) && !Accessible.IsComboDropdown(hwnd))
{
// instead of depending on oleacc to see if something has focus ask provider
if (!(bool)srcEl.GetCurrentPropertyValue(AutomationElement.HasKeyboardFocusProperty))
{
return;
}
}
// Do notifies
ClientEventManager.RaiseEventInThisClientOnly(AutomationElement.AutomationFocusChangedEvent, srcEl, e);
}
// Keep track of where we are right now (may be unknown/null)
_accCurrent = acc;
}
// OnEventSystemCaptureStart - process an EventSystemCaptureStart WinEvent.
private void OnEventSystemCaptureStart(int eventId, IntPtr hwnd, int idObject, int idChild, uint eventTime)
{
// Deal only with Combolbox dropdowns...
if (Accessible.IsComboDropdown(hwnd))
{
// Need to get id of focused item...
try
{
IntPtr i = Misc.SendMessageTimeout(NativeMethods.HWND.Cast(hwnd), UnsafeNativeMethods.LB_GETCURSEL, IntPtr.Zero, IntPtr.Zero);
Accessible acc = Accessible.Create(hwnd, UnsafeNativeMethods.OBJID_CLIENT, i.ToInt32() + 1);
if (acc == null)
{
return;
}
HandleFocusChange(hwnd, acc, idObject, idChild, eventTime);
}
catch (TimeoutException)
{
// Ignore
}
}
}
