protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
this.Note = e.Parameter as Note;
var backStack = Frame.BackStack;
var backStackCount = backStack.Count;
if (backStackCount > 0)
{
var masterPageEntry = backStack[backStackCount - 1];
backStack.RemoveAt(backStackCount - 1);
// Doctor the navigation parameter for the master page so it
// will show the correct item in the side-by-side view.
var modifiedEntry = new PageStackEntry(
masterPageEntry.SourcePageType,
this.Note.Name,
masterPageEntry.NavigationTransitionInfo);
backStack.Add(modifiedEntry);
}
// Register for hardware and software back request from the system
SystemNavigationManager.GetForCurrentView().BackRequested += DetailPage_BackRequested;
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
bool isFolderSet = await Settings.GetStorageFolderAsync() != null;
if (isFolderSet)
{
this.Message.Visibility = Visibility.Collapsed;
await NoteManager.TryReadAllFromStorageAsync();
if (e.Parameter != null)
{
// Parameter is item name
var name = (string)e.Parameter;
this.selectedNote = this.notes.GetByName(name);
}
this.SelectMostAppropriateNote();
this.UpdateForVisualState(AdaptiveStates.CurrentState);
VisualStateManager.GoToState(this, this.MasterState.Name, true);
// Don't play a content transition for first item load.
// Sometimes, this content will be animated as part of the page transition.
this.DisableContentTransitions();
VisualStateManager.GoToState(this, this.MasterState.Name, true);
}
else
{
this.Message.Visibility = Visibility.Visible;
VisualStateManager.GoToState(this, this.NoFolderState.Name, true);
}
}
private static async Task MergeFileIntoNote(StorageFile file, Note note)
{
note.DateCreated = file.DateCreated.LocalDateTime;
BasicProperties properties = await file.GetBasicPropertiesAsync();
note.DateModified = properties.DateModified.LocalDateTime;
note.Name = file.Name;
note.Text = await FileIO.ReadTextAsync(file);
note.MarkAsClean();
}
public static async Task WriteToStorageAsync(Note note)
{
if (note.IsDirty)
{
var save = StorageManager.SaveFileAsync(note.Name, note.Text);
note.MarkAsClean();
await save;
note.DateModified = DateTime.Now;
}
}
public static async Task RenameNoteAsync(Note note, string desiredName)
{
// It's possible that desiredName is null or empty. It's no big deal... just don't
// do anything
try
{
note.Name = await StorageManager.RenameFileAsync(note.Name, desiredName); ;
Notes.Remove(note as Note);
Notes.InsertInOrder(note as Note);
}
catch { }
}
private void SelectMostAppropriateNote()
{
if (this.notes.Count > 0)
{
if (this.selectedNote != null && !this.MasterListView.Items.Contains(this.selectedNote))
{
// If we're navigating back to this page then we reload all the notes from disk in which
// case we will have new references.
this.selectedNote = this.notes.Where(n => n.Name == this.selectedNote.Name).FirstOrDefault();
}
if (this.selectedNote == null)
{
this.selectedNote = this.notes[0];
}
this.MasterListView.SelectedItem = this.selectedNote;
}
}
public static async Task TryReadAllFromStorageAsync()
{
// Sometimes other saves will be going on. And we have a reasonably
// aggressive reload strategy going on - so rather than deal with
// serious marshalling just try it and don't worry too much
try
{
var files = await StorageManager.LoadFilesAsync();
// Ensure all files are in notes and up to date
foreach (var file in files)
{
var note = Notes.GetByName(file.Name);
if (note == null)
{
note = new Note { Name = file.Name };
Notes.InsertInOrder(note);
}
await MergeFileIntoNote(file, note);
}
// Now ensure that any notes NOT in a file is removed
for (int index = 0; index < Notes.Count; index++)
{
var note = Notes[index];
var file = files.Where(f => f.Name == note.Name).FirstOrDefault();
if (file == null)
{
Notes.RemoveAt(index);
index--;
}
}
}
catch { }
}
public static async Task DeleteNoteAsync(Note note)
{
await StorageManager.DeleteFileAsync(note.Name);
Notes.Remove(note as Note);
}
public static async Task RenameNoteAsync(Note note, string desiredName)
{
note.Name = await StorageManager.RenameFileAsync(note.Name, desiredName);;
Notes.Remove(note as Note);
Notes.InsertInOrder(note as Note);
}
public static async Task<Note> CreateNoteAsync()
{
string name = CreateNewUniqueName();
var note = new Note
{
DateCreated = DateTime.Now,
DateModified = DateTime.Now,
Name = name,
Text = string.Empty
};
Notes.InsertInOrder(note);
await StorageManager.CreateFileAsync(note.Name, note.Text);
return note;
}
private async void Add_Click(object sender, RoutedEventArgs e)
{
this.selectedNote = await NoteManager.CreateNoteAsync();
this.MasterListView.SelectedItem = this.selectedNote;
this.MasterListView.ScrollIntoView(this.selectedNote);
}
private async Task EditAsync(Note note)
{
this.selectedNote = note;
// Force a reload of the files in case they've changed in the background
await NoteManager.TryReadAllFromStorageAsync();
// Check the file still exists
if (!this.notes.Contains(this.selectedNote))
{
var dialog = new MessageDialog(Data.Constants.FileNotFoundException);
await dialog.ShowAsync();
this.SelectMostAppropriateNote();
return;
}
// We can only edit if there's only one selected
if (this.MasterListView.SelectedItems.Count == 1)
{
if (AdaptiveStates.CurrentState == NarrowState)
{
// Use "drill in" transition for navigating from master list to detail view
Frame.Navigate(typeof(DetailPage), this.selectedNote, new DrillInNavigationTransitionInfo());
}
else
{
// Play a refresh animation when the user switches detail items.
EnableContentTransitions();
}
}
}
