Thanks, I understand the change you recommened, but it doesn't seem to change anything. I have two different issues. I beleive I solved the first one. 1. The Projects pane should be expanded on startup BEFORE it loads so the user seees the wait indicator. This bit of code in the MainWindow simulates storing and resetting it from settings later on. if there was an ExpandedExpanded (past-tense) then I could call Load() from there. Main Window.cs
NavigationPaneInfos = new List
{
new NavigationPaneModel
{
Header = "Projects",
NavigationItemType = NavigationItemType.Project,
DataSource = Functional.Apply(Repository.GetNavigationItems, NavigationItemType.Project),
IsExpanded = true // <====== 1. This should force the Projects pane to expand on startup, and that should trigger Load() after the wait indicator is visible
},
new NavigationPaneModel
{
Header = "Inventory",
NavigationItemType = NavigationItemType.Inventory,
DataSource = Functional.Apply(Repository.GetNavigationItems, NavigationItemType.Inventory),
},
new NavigationPaneModel
{
Header = "Companies" ,
NavigationItemType = NavigationItemType.Company,
DataSource = Functional.Apply(Repository.GetNavigationItems, NavigationItemType.Company),
},
new NavigationPaneModel
{
Header = "Employees",
NavigationItemType = NavigationItemType.Employee,
DataSource = Functional.Apply(Repository.GetNavigationItems, NavigationItemType.Employee),
}
};
so, that caused this
private static object CoerceIsPaneExpanded(DependencyObject d, object baseValue)
{
var control = (NavigationPane)d;
var newVal = control._isInitialized ? baseValue : (object)false;
return newVal; //<======= THIS IS NEVER TRUE
}
and
private void NavigationPane\_Initialized(object? sender, EventArgs e)
{
\_isInitialized = true;
CoerceValue(IsPaneExpandedProperty);
if (\_isPaneExpanded) //<====== 2. THIS IS NEVER TRUE
{
\_ = Load();
}
}
so, I added this, which correctly sets _isPaneExpanded based off the value set in the main window
private static async void OnNavigationPaneModelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var control = (NavigationPane)d;
var model = e.NewValue as N
