/// <summary>
/// Handler called when user taps one of the RSS feed icons
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Button_Click(object sender, RoutedEventArgs e)
{
Button button = sender as Button;
int pageIndex = RSSFeedsPanorama.SelectedIndex;
PanoramaItem item = RSSFeedsPanorama.SelectedItem as PanoramaItem;
RSSPage page = item.DataContext as RSSPage;
RSSFeed feed = button.DataContext as RSSFeed;
int feedIndex = page.Feeds.IndexOf(feed);
if (feedIndex >= 0) // Act only on buttons on current page
{
NavigationService.Navigate(new Uri("/Views/FeedPivot.xaml?id=" + feedIndex.ToString() + "&page=" + pageIndex.ToString(), UriKind.Relative));
}
}
/// <summary>
/// Overridden OnNavigatedTo handler
/// </summary>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
if (isNewInstance)
{
pageId = int.Parse(NavigationContext.QueryString["pageId"]);
page = RSSService.GetRSSPage(pageId);
if (page != null)
{
PageTitle.Text = page.Title;
subscriptionsListBox.ItemsSource = page.Feeds;
}
isNewInstance = false;
}
}
/// <summary>
/// Overridden OnNavigatedTo handler
/// </summary>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
if (isNewInstance)
{
originalFeedId = feedId = int.Parse(NavigationContext.QueryString["id"]);
pageId = int.Parse(NavigationContext.QueryString["page"]);
page = RSSService.GetRSSPage(pageId);
InitializePivotViews(page);
// Switch to the previously selected PivotItem, if it has been stored
if (State.ContainsKey("feedPivotIndex"))
{
RSSItemsPivot.SelectedIndex = (int)State["feedPivotIndex"];
}
isNewInstance = false;
}
}
/// <summary>
/// Method that initializes all pivot items
/// </summary>
/// <param name="page"></param>
private void InitializePivotViews(RSSPage page)
{
// Perform initialization only on the 1st time
if (RSSItemsPivot.Items.Count == 0)
{
// Initialize PivotItems
// Initialize them starting from the one that was tapped
// so that when the PivotItems show up, the active one
// is already the tapped one. Otherwise we'd have to wait
// for all of the PivotItems to load and then change the
// SelectedIndex, which would result in animation in the
// Pivot control.
for (int i = 0; i < page.Feeds.Count; i++)
{
int j = originalFeedId + i;
if (j >= page.Feeds.Count)
{
j = j % page.Feeds.Count;
}
CreatePivotItem(page.Feeds[j]);
}
}
}
