//****************************************************************************
//See: https://stackoverflow.com/questions/42449050/cant-get-a-window-handle
//****************************************************************************
private static IntPtr[] FindChildWindows(IntPtr display, IntPtr window,
string title, ref List <IntPtr> windows)
{
IntPtr rootWindow;
IntPtr parentWindow;
IntPtr[] childWindows = new IntPtr[0];
int childWindowsLength;
X11lib.XQueryTree(display, window,
out rootWindow, out parentWindow,
out childWindows, out childWindowsLength);
childWindows = new IntPtr[childWindowsLength];
X11lib.XQueryTree(display, window,
out rootWindow, out parentWindow,
out childWindows, out childWindowsLength);
string windowFetchedTitle;
X11lib.XFetchName(display, window, out windowFetchedTitle);
if (title == windowFetchedTitle &&
!windows.Contains(window))
{
windows.Add(window);
}
for (int childWindowsIndexer = 0;
childWindowsIndexer < childWindows.Length;
childWindowsIndexer++)
{
IntPtr childWindow = childWindows[childWindowsIndexer];
string childWindowFetchedTitle;
X11lib.XFetchName(display, childWindow,
out childWindowFetchedTitle);
if (title == childWindowFetchedTitle &&
!windows.Contains(childWindow))
{
windows.Add(childWindow);
}
FindChildWindows(display, childWindow, title, ref windows);
}
windows.TrimExcess();
return(windows.ToArray());
}