public override AccessibleObject HitTest(int x, int y)
{
try {
object o = acc.accHitTest(x, y);
return(Wrap(o));
} catch (Exception) {
return(null);
}
}
private void root_MouseDown(object sender, MouseEventArgs e)
{
Control c = sender as Control;
AccessibleObject ao = c.AccessibilityObject;
Point screenPoint = c.PointToScreen(new Point(e.X, e.Y));
StringBuilder sb = new StringBuilder();
System.Reflection.PropertyInfo pi = c.GetType().GetProperty("AccessibleRootObject");
if (pi == null)
{
AccessibleObject aoPrev = null; // Some HitTests keep returning the leaf object.
for (AccessibleObject aoCur = ao.HitTest(screenPoint.X, screenPoint.Y);
aoCur != null && aoCur != ao && aoCur != aoPrev;
aoCur = aoCur.HitTest(screenPoint.X, screenPoint.Y))
{
if (sb.Length > 0)
{
sb.Append("/");
}
sb.Append(aoCur.Role);
sb.Append(":");
sb.Append(aoCur.Name);
aoPrev = aoCur;
}
}
else
{
IAccessible acc = (IAccessible)pi.GetValue(c, new object[0]);
for (IAccessible accCurr = (IAccessible)acc.accHitTest(screenPoint.X, screenPoint.Y);
accCurr != null;
accCurr = accCurr.accHitTest(screenPoint.X, screenPoint.Y) as IAccessible)
{
if (sb.Length > 0)
{
sb.Append("/");
}
sb.Append(InterpretRole(accCurr.get_accRole(null)));
sb.Append(":");
sb.Append(accCurr.get_accName(null));
}
}
string leafPath = sb.ToString();
m_output.WriteStartElement("click");
m_output.WriteAttributeString("path", AccessPath(sender as Control));
m_output.WriteAttributeString("at", "(" + e.X + "," + e.Y + ")");
if (leafPath.Length > 0)
{
m_output.WriteAttributeString("child", leafPath);
}
m_output.WriteEndElement();
m_output.WriteWhitespace("\n");
m_output.Flush();
}
// GetHelptopic not yet delegated.
// GetLifetimeService not delegated.
// GetSelected not yet delegated.
// GetType not delegated.
/// <summary>
/// Which child (or the recipient), if any, contains the point.
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns></returns>
public override AccessibleObject HitTest(int x, int y)
{
IAccessible acc = (IAccessible)(m_acc.accHitTest(x, y));
if (acc == null)
{
return(null);
}
if (acc == m_acc)
{
return(this);
}
return(new AccessibleObjectFromIAccessible(acc));
}
object?IAccessibleInternal.accHitTest(int xLeft, int yTop) => AsNativeAccessible(publicIAccessible.accHitTest(xLeft, yTop));
object UnsafeNativeMethods.IAccessibleInternal.accHitTest(int xLeft, int yTop)
{
IntSecurity.UnmanagedCode.Assert();
return(AsNativeAccessible(publicIAccessible.accHitTest(xLeft, yTop)));
}
