async void AskBeforeDeletion(LoadUIElement elem)
{
string songName = FileUtilities.SongNameFromFilePath(elem.filePath);
bool answer = await DisplayAlert("Are you sure you want to delete?", "If you click yes, '" + songName + "' will be lost forever.", "Yes", "No");
if (answer)
{
FileUtilities.DeleteSongFile(songName); // Delete the file
masterLayout.Children.Remove(elem); // Refresh the page
}
}
/// <summary>
/// Method to load in/refresh UI based on which songs are saved
/// </summary>
public void LoadSongUIElements()
{
// Get all the remaining files
String[] songNames = Directory.GetFiles(FileUtilities.PathToSongDirectory);
//Sort song names alphabetically, ignoring case.
Array.Sort(songNames, StringComparer.CurrentCultureIgnoreCase);
if (songNames.Length == 0) // If there are no saved songs
{
Label noSongsLabel = new Label
{
Text = "No saved songs",
FontSize = 40,
TextColor = Color.White,
HorizontalTextAlignment = TextAlignment.Center, //
VerticalTextAlignment = TextAlignment.Center, // Ensures that the label is in the
// very center of screen
HorizontalOptions = LayoutOptions.FillAndExpand, //
VerticalOptions = LayoutOptions.FillAndExpand //
};
masterLayout.Children.Add(noSongsLabel);
}
else
{
foreach (String name in songNames)
{
LoadUIElement songUI = new LoadUIElement(name); // Make a new instance of the UI element
songUI.Tap += OnSongTap;
songUI.DeleteClicked += delegate(LoadUIElement elem)
{
AskBeforeDeletion(elem); // Delete song file, refresh page
};
songUI.ShareClicked += delegate(LoadUIElement elem)
{
ShareSongFile(elem.filePath); // Prompt user to share this song
};
masterLayout.Children.Add(songUI); // Add UI element to the masterLayout
}
}
scroller.Content = masterLayout; // Put updated masterLayout in scroller
Content = scroller; // Refresh the page content with the new scroller
}
/// <summary>
/// Event handler for a SongUIElement being tapped
/// </summary>
/// <param name="uiElement">Song user interface.</param>
async void OnSongTap(LoadUIElement uiElement)
{
if (mainpage.loadedSongChanged)
{
bool load = await DisplayAlert("Load Warning", "You will lose unsaved data if you load this song. Load anyway?", "Load without saving", "Cancel");
if (!load) // Save first
{
return;
}
}
mainpage.clearedSong = null;
mainpage.SetSong(FileUtilities.LoadSongFromFile(uiElement.filePath));
mainpage.lastLoadedSongName = FileUtilities.SongNameFromFilePath(uiElement.filePath);
//Does not let users undo clear after loading a song
mainpage.clearedSong = null;
ReturnToMainPage();
}