public static bool Has(string name)
{
StandardWindowReference spot = Spot(name);
StandardWindow instance;
return(spot != null && spot.window.TryGetTarget(out instance) && instance != null);
}
// parameters: nameof(class)
internal static StandardWindowReference Spot(string name)
{
StandardWindowReference spot = null;
lock (windows_lock)
{
foreach (var el in windows)
{
if (el.type == name)
{
spot = el;
break;
}
}
}
return(spot);
}
public static StandardWindow Create(string name, StandardWindowCreatorFunction maker)
{
StandardWindowReference spot = Spot(name);
StandardWindow instance;
if (spot != null && spot.window.TryGetTarget(out instance) && instance != null)
{
return(instance);
}
else
{
// got to create an instance (and store it!)
instance = maker();
if (spot == null)
{
spot = new StandardWindowReference()
{
window = new WeakReference <StandardWindow>(instance),
type = name
};
lock (windows_lock)
{
windows.Add(spot);
}
}
else
{
// update spot:
lock (windows_lock)
{
spot.window.SetTarget(instance);
}
}
return(instance);
}
}
