public void HandleNavigated(ShellNavigatedEventArgs args)
{
if (AccumulateNavigatedEvents)
{
if (_accumulatedEvent == null)
{
_accumulatedEvent = args;
}
}
else
{
_accumulatedEvent = null;
BaseShellItem baseShellItem = _shell.CurrentItem?.CurrentItem?.CurrentItem;
if (baseShellItem != null)
{
baseShellItem.OnAppearing(() =>
{
FireNavigatedEvents(args, _shell);
});
}
else
{
FireNavigatedEvents(args, _shell);
}
void FireNavigatedEvents(ShellNavigatedEventArgs a, Shell shell)
{
Navigated?.Invoke(this, args);
// reset active page route tree
Routing.ClearImplicitPageRoutes();
Routing.RegisterImplicitPageRoutes(_shell);
}
}
}
public static BaseShellItem SearchForPart(this BaseShellItem part, Func <BaseShellItem, bool> searchBy)
{
if (searchBy(part))
{
return(part);
}
BaseShellItem baseShellItem = null;
switch (part)
{
case IShellItemController item:
foreach (var section in item.GetItems())
{
baseShellItem = SearchForPart(section, searchBy);
if (baseShellItem != null)
{
return(baseShellItem);
}
}
break;
case IShellSectionController section:
foreach (var content in section.GetItems())
{
baseShellItem = SearchForPart(content, searchBy);
if (baseShellItem != null)
{
return(baseShellItem);
}
}
break;
}
return(null);
}
public static BaseShellItem SearchForRoute(this BaseShellItem shell, string route) => SearchForPart(shell, (p) => p.Route == route);
public static T SearchForRoute <T>(this BaseShellItem shell, string route) where T : BaseShellItem => (T)SearchForRoute(shell, route);
public void HandleNavigated(ShellNavigatedEventArgs args)
{
_waitingForWindow?.Dispose();
_waitingForWindow = null;
// we don't want to fire Navigated until shell is attached to an actual window
if (_shell.Window == null || _shell.CurrentPage == null)
{
_shell.PropertyChanged += WaitForWindowToSet;
var shellContent = _shell?.CurrentItem?.CurrentItem?.CurrentItem;
if (shellContent != null)
{
shellContent.ChildAdded += WaitForWindowToSet;
}
_waitingForWindow = new ActionDisposable(() =>
{
_shell.PropertyChanged -= WaitForWindowToSet;
if (shellContent != null)
{
shellContent.ChildAdded -= WaitForWindowToSet;
}
});
void WaitForWindowToSet(object sender, EventArgs e)
{
if (_shell.Window != null &&
_shell.CurrentPage != null)
{
_waitingForWindow?.Dispose();
_waitingForWindow = null;
_shell.CurrentItem?.SendAppearing();
HandleNavigated(args);
}
}
return;
}
if (AccumulateNavigatedEvents)
{
if (_accumulatedEvent == null)
{
_accumulatedEvent = args;
}
}
else
{
_accumulatedEvent = null;
BaseShellItem baseShellItem = _shell.CurrentItem?.CurrentItem?.CurrentItem;
if (baseShellItem != null)
{
baseShellItem.OnAppearing(() =>
{
FireNavigatedEvents(args, _shell);
});
}
else
{
FireNavigatedEvents(args, _shell);
}
void FireNavigatedEvents(ShellNavigatedEventArgs a, Shell shell)
{
Navigated?.Invoke(this, args);
// reset active page route tree
Routing.ClearImplicitPageRoutes();
Routing.RegisterImplicitPageRoutes(_shell);
}
}
}
protected override bool IsShellElementVisible(BaseShellItem item)
{
IShellContentController controller = (IShellContentController)item;
return(controller.Page == null || controller.Page.IsVisible);
}