protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
// For now, we push useless information onto the cache to keep everything else working
if (e.NavigationMode is NavigationMode.New)
{
ComicItemGridCache.PushStack(this.NavigationTag, this.PageName, new ComicItemGridState(new(), 0, this.MainViewModel.LastModified));
}
// Ideally this should be automated
this.ViewModel.RemoveEventHandlers();
}
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
if (this.ComicItemGrid is null)
{
throw new ProgrammerError("Navigating out of a ComicNavigationItemPage that wasn't initialized.");
}
if (e.NavigationMode is NavigationMode.New)
{
ComicItemGridCache.PushStack(this.NavigationTag, this.ComicItem.Title, this.ComicItemGrid.GetSaveState());
}
// Ideally this should be automated
this.viewModel !.RemoveEventHandlers();
this.ComicItemGrid.DisposeAndInvalidate();
}