internal static SystemAccessibleObject GetAccessibleObject(AccessibleEventArgs e)
{
IAccessible iacc;
object child;
uint result = AccessibleObjectFromEvent(e.HWnd, e.ObjectID, e.ChildID, out iacc, out child);
// Note: AccessibleObjectFromEvent() sometimes fails due to missing IAccessible implementation of object and/or child
// This often happens for HTML content in Internet Explorer (e.g. for any <DIV> w/o 'role' attribute set).
// Try again without using ChildID and/or ObjectID,
// i.e. ChildID==0 will return the parent object; ObjectID==0 will return the parent window
if (result != 0 && e.ChildID != 0)
{
// second chance: try to receive object instead of child
result = AccessibleObjectFromEvent(e.HWnd, e.ObjectID, 0, out iacc, out child);
}
if (result != 0)
{
// third chance: try to receive window instead of object or child
result = AccessibleObjectFromEvent(e.HWnd, 0, 0, out iacc, out child);
}
if (result != 0)
{
throw new Exception("AccessibleObjectFromPoint returned " + result);
}
return(new SystemAccessibleObject(iacc, (int)child));
}
private void listener_EventOccurred(object sender, ManagedWinapi.Accessibility.AccessibleEventArgs e)
{
if (nomouse.Checked && e.EventType == AccessibleEventType.EVENT_OBJECT_LOCATIONCHANGE && e.HWnd == IntPtr.Zero && e.ObjectID == (uint)AccessibleObjectID.OBJID_CURSOR)
{
return;
}
if (e.HWnd == clear.Handle || e.HWnd == skip.Handle || e.HWnd == list.Handle)
{
return;
}
if (skip.Checked)
{
skipped++;
skip.Text = "Skip (" + skipped + ")";
}
else
{
ListViewItem lvi = new ListViewItem(new string[] { "" + (idx++), e.EventType.ToString(), "0x" + e.HWnd.ToString("x8"),
"0x" + e.ObjectID.ToString("x8"), "0x" + e.ChildID.ToString("x8"), "0x" + e.Thread.ToString("x8"),
e.Time.ToString() });
lvi.Tag = e;
list.Items.Add(lvi);
lvi.EnsureVisible();
}
}
internal static SystemAccessibleObject GetAccessibleObject(AccessibleEventArgs e)
{
IAccessible iacc;
object child;
uint result = AccessibleObjectFromEvent(e.HWnd, e.ObjectID, e.ChildID, out iacc, out child);
if (result != 0)
{
throw new Exception("AccessibleObjectFromPoint returned " + result);
}
return(new SystemAccessibleObject(iacc, (int)child));
}
private void InternalCallback(IntPtr hWinEventHook, AccessibleEventType eventType,
IntPtr hwnd, uint idObject, uint idChild, uint dwEventThread, uint dwmsEventTime)
{
if (hWinEventHook != handle)
{
return;
}
AccessibleEventArgs aea = new AccessibleEventArgs(eventType, hwnd, idObject, idChild, dwEventThread, dwmsEventTime);
if (EventOccurred != null)
{
EventOccurred(this, aea);
}
}
/// <summary>
/// Handler for window move event
/// </summary>
/// <param name="sender">Object that raised the event</param>
/// <param name="ea">Event arguments</param>
private void OnWindowMoveHandler(object sender, AccessibleEventArgs ea)
{
// Ignore events from cursor
if (ea.ObjectID != 0)
{
return;
}
// Stop fallback strategy timer if enabled
if (this.fallbackStrategyTimer.IsEnabled)
{
this.fallbackStrategyTimer.Stop();
}
// Invoke event handler
if (this.ClientAreaChanged != null)
{
this.ClientAreaChanged(this, EventArgs.Empty);
}
}
private void InternalCallback(IntPtr hWinEventHook, AccessibleEventType eventType,
IntPtr hwnd, uint idObject, uint idChild, uint dwEventThread, uint dwmsEventTime)
{
if (hWinEventHook != handle) return;
AccessibleEventArgs aea = new AccessibleEventArgs(eventType, hwnd, idObject, idChild, dwEventThread, dwmsEventTime);
if (EventOccurred != null)
EventOccurred(this, aea);
}
internal static SystemAccessibleObject GetAccessibleObject(AccessibleEventArgs e)
{
IAccessible iacc;
object child;
uint result = AccessibleObjectFromEvent(e.HWnd, e.ObjectID, e.ChildID, out iacc, out child);
// Note: AccessibleObjectFromEvent() sometimes fails due to missing IAccessible implementation of object and/or child
// This often happens for HTML content in Internet Explorer (e.g. for any <DIV> w/o 'role' attribute set).
// Try again without using ChildID and/or ObjectID,
// i.e. ChildID==0 will return the parent object; ObjectID==0 will return the parent window
if (result != 0 && e.ChildID != 0)
// second chance: try to receive object instead of child
result = AccessibleObjectFromEvent(e.HWnd, e.ObjectID, 0, out iacc, out child);
if (result != 0)
// third chance: try to receive window instead of object or child
result = AccessibleObjectFromEvent(e.HWnd, 0, 0, out iacc, out child);
if (result != 0) throw new Exception("AccessibleObjectFromPoint returned " + result);
return new SystemAccessibleObject(iacc, (int)child);
}
internal static SystemAccessibleObject GetAccessibleObject(AccessibleEventArgs e)
{
IAccessible iacc;
object child;
uint result = AccessibleObjectFromEvent(e.HWnd, e.ObjectID, e.ChildID, out iacc, out child);
if (result != 0) throw new Exception("AccessibleObjectFromPoint returned " + result);
return new SystemAccessibleObject(iacc, (int)child);
}
