/// <summary>
/// Forces a resynchronization of the containing <see cref="Wallpaper" /> objects with the physical image files on the
/// users hard disk.
/// </summary>
/// <commondoc select='IDisposable/Methods/All/*' />
public void Resynchronize()
{
if (this.IsDisposed)
{
throw new ObjectDisposedException("this");
}
string[] existingFiles = Directory.GetFiles(this.SynchronizedDirectoryPath);
// Add wallpapers that are on the hard disk but not in this category.
for (int i = 0; i < existingFiles.Length; i++)
{
Path existingPath = new Path(existingFiles[i]);
if (this.IndexOfByImagePath(existingPath) == -1)
{
if (SynchronizedWallpaperCategory.IsImageFileExtensionSupported(existingPath))
{
this.AddAsync(existingPath);
}
}
}
// Remove wallpapers which are in this category but doesn't exist on the hard disk.
for (int i = this.Count - 1; i >= 0; i--)
{
if ((this[i].ImagePath == Path.None) || (!existingFiles.Contains(this[i].ImagePath)))
{
base.RemoveItem(i);
}
}
}
/// <summary>
/// Handles the <see cref="System.IO.FileSystemWatcher.Changed" /> event of a <see cref="System.IO.FileSystemWatcher" />
/// object.
/// </summary>
/// <commondoc select='All/Methods/EventHandlers[@Params="Object,+EventArgs"]/*' />
private void FileSystemWatcher_Changed(object sender, FileSystemEventArgs e)
{
Action <Path> code = (filePath) => {
// Make sure the item doesn't already exist.
if (this.IndexOfByImagePath(filePath) == -1 && SynchronizedWallpaperCategory.IsImageFileExtensionSupported(filePath))
{
this.AddAsync(filePath);
}
};
this.InvokeDispatcher.Invoke(DispatcherPriority.Background, code, new Path(e.FullPath));
}