internal void RemoveHost(ContentControl cc)
{
// make sure it is not null
if (cc == null)
{
return;
}
// make suer it is out host to begin with...
if (!_hosts.Contains(cc))
{
return;
}
if (RegionHost.GetRegion(cc) != null)
{
RegionHost.SetRegion(cc, null);
}
_hosts.Remove(cc);
// clear the binding
ChangeHostContentProperty(cc, RegionHost.GetContentProperty(cc), null);
}
private Task _ensureWindowOpen(RegionService service)
{
if (!service.Hosts.OfType <Window>().Any())
{
var w = new Window();
w.Unloaded += (s, e) =>
{
var action = _onClosing;
_onClosing = null;
action?.Invoke();
};
Application.Current.Exit += (s, e) =>
{
var action = _onClosing;
_onClosing = null;
action?.Invoke();
};
_myWindows.Add(w);
w.Style = WindowStyle;
RegionHost.SetRegion(w, service.Region);
w.Show();
}
return(Tasks.Empty);
}
private Task _ensureWindowOpen(RegionService service)
{
if (!service.Hosts.OfType <Window>().Any())
{
var w = new Window();
w.SizeToContent = SizeToContent;
w.WindowStartupLocation = WindowStartupLocation;
_myWindows.Add(w);
w.Style = WindowStyle;
RegionHost.SetRegion(w, service.Region);
// simply calling ShowDialog will block the method, so e need to trick it...
w.Dispatcher.BeginInvoke(new Action(() => {
// make sure window was not closed since dispatching
if (_myWindows.Contains(w))
{
w.ShowDialog();
}
}));
}
return(Tasks.Empty);
}
internal void AddHost(ContentControl cc)
{
// first let's make sure we acutally get something as parameter
if (cc == null)
{
return;
}
// make sure the host really wants to be yours :-)
if (RegionHost.GetRegion(cc) != _region)
{
RegionHost.SetRegion(cc, _region);
}
// now make sure it is not already in the list of hosts
if (_hosts.Contains(cc))
{
return;
}
// so we actually need to set this as a new host
_hosts.Add(cc);
// remember to remove it when it is unloaded
cc.Unloaded += _onHostUnloaded;
// for window objects, unload is not enough, so we also listen to closed
if (cc is Window w)
{
w.Closed += (s, e) =>
{
RemoveHost(w);
};
}
ChangeHostContentProperty(cc, null, RegionHost.GetContentProperty(cc));
}