protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
recipes = (RecipeList)e.Parameter;
selectedRecipe = recipes.getSelected();
detailSection.SelectedItem = detailSection.MenuItems[0];
contentFrame.Navigate(typeof(DetailPage), selectedRecipe);
if (isNarrow())
{
IList <PageStackEntry> backStack = Frame.BackStack;
int backStackCount = backStack.Count;
if (backStackCount > 0)
{
PageStackEntry masterPageEntry = backStack[backStackCount - 1];
backStack.RemoveAt(backStackCount - 1);
PageStackEntry modifiedEntry = new PageStackEntry(
masterPageEntry.SourcePageType,
recipes,
masterPageEntry.NavigationTransitionInfo
);
backStack.Add(modifiedEntry);
}
// Show back button
NavigationView currShell = AppShell.currentShell;
currShell.IsBackButtonVisible = NavigationViewBackButtonVisible.Visible;
currShell.IsBackEnabled = true;
}
}
private async void tryDeleteRecipe(Recipe recipeToDelete)
{
ContentDialog deleteConfirmationDialog = new ContentDialog
{
Title = "Permenantly delete recipe?",
Content = "If you delete this recipe, you won't be" +
" able to recover it. Are you Sure you want to delete" +
" it?",
PrimaryButtonText = "Delete",
CloseButtonText = "Cancel"
};
ContentDialogResult result = await deleteConfirmationDialog.ShowAsync();
if (result == ContentDialogResult.Primary)
{
int deleteIndex = recipes.getRecipeList().IndexOf(recipeToDelete);
if (deleteIndex > 0)
{
// deleting recipe somewhere other than beginning
// select the recipe before it
recipes.SelectedIndex = deleteIndex - 1;
}
else if (deleteIndex == 0)
{
// deleting recipe at the beginning
// select the same index
recipes.SelectedIndex = 0;
}
recipes.removeRecipe(recipeToDelete);
if (isNarrow())
{
Frame.GoBack();
}
else
{
if (recipes.Recipes.Count == 0)
{
// hide this column
detailSectionGrid.Visibility = Visibility.Collapsed;
}
selectedRecipe = recipes.getSelected();
detailSection.SelectedItem = detailSection.MenuItems[0];
contentFrame.Navigate(typeof(DetailPage), selectedRecipe);
}
}
}