/// <summary>
/// Called to handle a command that takes a collection of selected objects and a completion action
/// </summary>
/// <param name="commandIdentity"></param>
/// <param name="selection"></param>
/// <param name="callback"></param>
public virtual void HandleCommand(int commandIdentity, GroupedSelection selection, CommandRouter.CommandHandlerCallback callback, AppCompatImageButton button)
{
selectedObjects = selection;
commandCallback = callback;
commandButton = button;
HandleCommand(commandIdentity);
}
/// <summary>
/// Use the command handler associated with each button to determine if the button should be shown
/// </summary>
/// <param name="selectedObjects"></param>
public void DetermineButtonsVisibility(GroupedSelection selectedObjects)
{
foreach (KeyValuePair <int, AppCompatImageButton> buttonPair in Buttons)
{
// Is there a command handler associated with this button
CommandHandler handler = CommandRouter.GetHandlerForCommand(buttonPair.Key);
if (handler != null)
{
buttonPair.Value.Visibility =
(handler.IsSelectionValidForCommand(selectedObjects, buttonPair.Key) == true) ? ViewStates.Visible : ViewStates.Gone;
}
}
}
/// <summary>
/// Called when the number of selected items (songs) has changed.
/// Update the text to be shown in the Action Mode title
/// </summary>
protected override void SelectedItemsChanged(GroupedSelection selectedObjects)
{
if (selectedObjects.Songs.Count == 0)
{
ActionMode.ActionModeTitle = NoItemsSelectedText;
}
else
{
int albumsCount = selectedObjects.Albums.Count;
int songsCount = selectedObjects.Songs.Count;
string albumsText = (albumsCount > 0) ? string.Format("{0} album{1} ", albumsCount, (albumsCount == 1) ? "" : "s") : "";
string songsText = (songsCount > 0) ? string.Format("{0} song{1} ", songsCount, (songsCount == 1) ? "" : "s") : "";
ActionMode.ActionModeTitle = string.Format(ItemsSelectedText, albumsText, songsText);
}
ActionMode.AllSelected = (selectedObjects.Albums.Count == AlbumsViewModel.Albums.Count);
}
/// <summary>
/// Called when the number of selected items has changed.
/// Update the text to be shown in the Action Mode title
/// </summary>
protected override void SelectedItemsChanged(GroupedSelection selectedObjects)
{
if ((selectedObjects.PlaylistItems.Count == 0) && (selectedObjects.Playlists.Count == 0))
{
ActionMode.ActionModeTitle = NoItemsSelectedText;
}
else
{
int playlistCount = selectedObjects.Playlists.Count;
int songCount = selectedObjects.PlaylistItems.Count(item => item is SongPlaylistItem) +
selectedObjects.PlaylistItems.Where(item => item is AlbumPlaylistItem).SelectMany(list => (( AlbumPlaylistItem )list).Album.Songs).Count();
string playlistText = (playlistCount > 0) ? string.Format("{0} playlist{1} ", playlistCount, (playlistCount == 1) ? "" : "s") : "";
string songsText = (songCount > 0) ? string.Format("{0} song{1} ", songCount, (songCount == 1) ? "" : "s") : "";
ActionMode.ActionModeTitle = string.Format(ItemsSelectedText, playlistText, songsText);
}
ActionMode.AllSelected = (selectedObjects.Playlists.Count == PlaylistsViewModel.Playlists.Count);
}
/// <summary>
/// Called when the number of selected items (songs) has changed.
/// Update the text to be shown in the Action Mode title
/// </summary>
protected override void SelectedItemsChanged(GroupedSelection selectedObjects)
{
ActionMode.ActionModeTitle = (selectedObjects.PlaylistItems.Count == 0) ? NoItemsSelectedText : string.Format(ItemsSelectedText, selectedObjects.PlaylistItems.Count);
ActionMode.AllSelected = (selectedObjects.PlaylistItems.Count == NowPlayingViewModel.NowPlayingPlaylist.PlaylistItems.Count);
}
/// <summary>
/// Is the command valid given the selected objects
/// </summary>
/// <param name="selectedObjects"></param>
/// <returns></returns>
public bool IsSelectionValidForCommand(GroupedSelection selection, int commandId)
{
selectedObjects = selection;
return(IsSelectionValidForCommand(commandId));
}
