XQueryTree is detecting a window twice - c++

Question

I'm working on a feature in my Qt program where you have the option to store the locations of your application's windows in a profile manner and load that profile later. After some research I found QSettings quite handy and useful for storing UI info like x, y etc. For detecting the windows I decided to use XLib.
I'm very beginner to using Xlib, I found this code which recursively query any open window starting from ":0.0". Inside the foreach loop I did this save function:
int x, y;
int xGeo, yGeo;
int width, height, border, depth;
Display *disp = XOpenDisplay(":0.0");
Window rootWin = XDefaultRootWindow(disp);
QList<Window> windows = listXWindowsRecursive(disp, rootWin);
char* name = NULL;
XWindowAttributes* attributes;
foreach(Window win, windows)
{
attributes = new XWindowAttributes;
// Enumerate through all windows
if(XFetchName(disp, win, &name) && name != NULL)
{
if(strcmp(name, "Secondary Window") == 0)
{
Window child;
qDebug() << (name);
XTranslateCoordinates(disp, win, rootWin, 0, 0, &x, &y, &child);
qDebug() << "XC = " << x << " - " << "YC = " << y;
if(XGetGeometry(disp, win, &rootWin, &xGeo, &yGeo, &width, &height, &border, &depth))
qDebug() << "XGeo= " << x - xGeo << " - " << "YGeo= " << y - yGeo;
settings.setValue("secondaryWindow/x", x - xGeo);
settings.setValue("secondaryWindow/y", y - yGeo);
settings.setValue("secondaryWindow/width", width);
settings.setValue("secondaryWindow/height", height);
if(XGetWindowAttributes(disp, win, attributes))
{
qDebug() << "X = " << x - attributes->x << " - " << "Y = " << y - attributes->y;
}
}
}
}
This portion gets the Qt UI info like X and Y and stores them using QSettings
First thing I'm not sure if what I wrote is the right way to get the X and Y for the window because of these facts. Also I'm not sure if I'm correctly passing the required parameters.
Second thing, this is the load function:
if(settings.contains("secondaryWindow/x") && settings.contains("secondaryWindow/y"))
{
SecondaryWindow* win = new SecondaryWindow;
win->setGeometry(settings.value("secondaryWindow/x").toInt(),
settings.value("secondaryWindow/y").toInt(),
settings.value("secondaryWindow/width").toInt(),
settings.value("secondaryWindow/height").toInt());
win->show();
}
Here is the weird scenario, there is a button that opens the secondary window (using new and show) which works fine. Back to the main window clicking the save function, I get the correct secondary window info.
Now If I closed the secondary window and then clicked the load function, the secondary window opens correctly in the previous position BUT, clicking the save function again here will tell me that there are two "Secondary Window" instances but the second one has X and Y = 0.
By "closing the window" I mean using either the "X" button and using the close() slot. Could it be that the window is not closed correctly? I already implemented the closeEvent handler:
event->accept();
QWidget::closeEvent(event);
Any help is appreciated, Thanks!