// 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);
}
}
// determine focus - taking menu mode into account
private static IRawElementProviderFragment GetFocusedProvider()
{
// Menus are special as far as focus goes - they get a special type of keyboard
// capture from USER32 that is outside of the regular focus mechanism.
// Therefore they have to be dealt with specially - regular drilling won't work.
SafeNativeMethods.GUITHREADINFO gti = new SafeNativeMethods.GUITHREADINFO();
if (Misc.GetGUIThreadInfo(0, ref gti))
{
if ((gti.dwFlags & SafeNativeMethods.GUI_INMENUMODE) != 0
|| (gti.dwFlags & SafeNativeMethods.GUI_SYSTEMMENUMODE) != 0
|| (gti.dwFlags & SafeNativeMethods.GUI_POPUPMENUMODE) != 0)
{
// We're in menu mode - see if there's a registered menu focus handler:
IRawElementProviderSimple provider = ProxyManager.GetUser32FocusedMenuProvider(gti.hwndMenuOwner);
if (provider != null)
{
Debug.Assert(provider is IRawElementProviderFragment, "Expecting a fragment provider");
return provider as IRawElementProviderFragment;
}
}
else
{
return Wrap(gti.hwndFocus);
}
}
return null;
}
// detect if we're in the menu mode
private static bool InMenuMode()
{
SafeNativeMethods.GUITHREADINFO gui = new SafeNativeMethods.GUITHREADINFO();
if (!Misc.GetGUIThreadInfo(0, ref gui))
{
return false;
}
return (SafeNativeMethods.GUI_INMENUMODE == (gui.dwFlags & SafeNativeMethods.GUI_INMENUMODE));
}
// Get current focused HWND
private static NativeMethods.HWND GetFocusedWindow()
{
SafeNativeMethods.GUITHREADINFO gti = new SafeNativeMethods.GUITHREADINFO();
if (!Misc.GetGUIThreadInfo(0, ref gti))
{
return NativeMethods.HWND.NULL;
}
return gti.hwndFocus;
}
object IRawElementProviderSimple.GetPropertyValue(int propertyId)
{
AutomationProperty idProp = AutomationProperty.LookupById(propertyId);
if (idProp == AutomationElement.AutomationIdProperty)
{
// Only child windows have control ids - top-level windows have HMENUs instead
// So first check that this is not top-level
if(IsTopLevelWindow(_hwnd))
{
return null;
}
int id = Misc.GetWindowLong(_hwnd, SafeNativeMethods.GWL_ID);
// Ignore controls with no id, or generic static text (-1)
if( id == 0 || id == -1 )
{
return null;
}
// Return string representation of id...
return id.ToString(CultureInfo.InvariantCulture);
}
else if (idProp == AutomationElement.ClassNameProperty)
{
return ProxyManager.GetClassName( _hwnd );
}
else if (idProp == AutomationElement.NameProperty)
{
// For now, assume window text is same as name.
// Not true for edits, combos, and other controls that use labels,
// but will deal with that later.
IntPtr len = Misc.SendMessageTimeout( _hwnd, UnsafeNativeMethods.WM_GETTEXTLENGTH, IntPtr.Zero, IntPtr.Zero );
int ilen = len.ToInt32();
if (ilen == 0)
{
return "";
}
// Length passes to SendMessage includes terminating NUL
StringBuilder str = new StringBuilder( ilen + 1 );
if (Misc.SendMessageTimeout(_hwnd, UnsafeNativeMethods.WM_GETTEXT, new IntPtr(ilen + 1), str) == IntPtr.Zero)
{
str[0] = '\0';
}
// get rid of any & used for shortcut keys
return Misc.StripMnemonic(str.ToString());
}
else if (idProp == AutomationElement.IsEnabledProperty)
{
return IsWindowReallyEnabled( _hwnd );
}
else if (idProp == AutomationElement.ProcessIdProperty)
{
// Get the pid of the process that the HWND lives in, not the
// pid that this proxy lives in
int pid;
// GetWindowThreadProcessId does use SetLastError(). So a call to GetLastError() would be meanless.
// Disabling the PreSharp warning.
#pragma warning suppress 6523
if (SafeNativeMethods.GetWindowThreadProcessId(_hwnd, out pid) == 0)
{
throw new ElementNotAvailableException();
}
return pid;
}
else if( idProp == AutomationElement.NativeWindowHandleProperty )
{
// Need to downcast to Int32, since IntPtr's are not remotable.
return ((IntPtr) _hwnd).ToInt32();
}
else if (idProp == AutomationElement.HasKeyboardFocusProperty)
{
SafeNativeMethods.GUITHREADINFO gti = new SafeNativeMethods.GUITHREADINFO ();
if (!Misc.GetGUIThreadInfo(0, ref gti))
{
return false;
}
return (gti.hwndFocus == _hwnd) || (SafeNativeMethods.IsChild(_hwnd, gti.hwndFocus));
}
else if (idProp == AutomationElement.FrameworkIdProperty)
{
return Misc.IsWindowsFormsControl(ProxyManager.GetClassName(_hwnd)) ? "WinForm" : "Win32";
}
else if (idProp == AutomationElement.ControlTypeProperty)
{
if (IsWindowPatternWindow(_hwnd))
{
return ControlType.Window.Id;
}
else
{
return ControlType.Pane.Id;
}
}
return null;
}