public UPnPPageManager(UPnPPresenter presenter)
{
Presenter = presenter;
_pages = new Stack<UPnPPage>();
_pageDictionary = new Dictionary<Guid, UPnPPage>();
CurrentPage = new UPnPPage(presenter);
}
public void Push(Page.ePageType pageType)
{
lock (this)
{
_pages.Push(CurrentPage);
_pageDictionary.Add(CurrentPage.Id, CurrentPage);
CurrentPage = new UPnPPage(Presenter) { PageType = pageType };
Presenter.OnPropertyChanged("CanGoBack");
Presenter.OnPropertyChanged("Items");
}
}
/// <summary>
/// Clears all pages and resets the CurrentPage to a new page.
/// </summary>
public void Clear()
{
_pages.Clear();
_pageDictionary.Clear();
CurrentPage = new UPnPPage(Presenter);
}
private void RequestItemActivation(UPnPItem item, UPnPPage page)
{
// send ItemActivated only if there is only one item in the Items
// list and it is the item that is selected. Otherwise just add
// the item that is 'activated'. doing this causes the Gallery
// to have an interim stage before calling for an activation of
// the item (sending the event)
if (DoActivation(item, page))
Open(item, page);
else
GoToDetails(item);
}
private void Open(AVItem item, UPnPPage page)
{
// change the item to a playback item so templating works without
// using the event
if (page.Id != CurrentPage.Id)
throw new InvalidOperationException(
"Paging is out of sync. The requested page and the current page must be the same.");
SetPageType(Page.ePageType.PlaybackActivated, CurrentPage.Id);
SafeInvoke(() =>
{
page.Items.Clear();
var playback = item.Copy<UPnPPlayback>();
page.Items.Add(playback);
});
// activate after the item is in the list
OnItemActivated(new ItemActivatedEventArgs(item));
OnPropertyChanged("Items");
}
private bool DoActivation(AVItem item, UPnPPage page)
{
if (EnableDetailsPage)
return page.Items.Count == 1 && page.Items[0].Equals(item);
return true;
}
