public SoundSourceSelector()
{
InitializeComponent();
AllowDrop = true;
DragEnter += (s, e) =>
{
e.Effect = DragDropEffects.None;
if (!e.Data.GetDataPresent(DataFormats.FileDrop))
{
return;
}
var items = (string[])e.Data.GetData(DataFormats.FileDrop);
if (items.Length != 1)
{
return;
}
string path = items.Single();
if (SupportedExtensions.Any(p => Path.GetExtension(path) == p) && File.Exists(path))
{
e.Effect = DragDropEffects.Copy;
}
};
DragDrop += (s, e) =>
{
filePathBox.Text = ((string[])e.Data.GetData(DataFormats.FileDrop)).Single();
};
}
private static async void SourcePropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
if (e.OldValue is string oldFilePath && PreviewedFilePaths.Contains(oldFilePath))
{
PreviewedFilePaths.Remove(oldFilePath);
}
if (obj is Image image)
{
if (e.NewValue is string filePath && !String.IsNullOrEmpty(filePath))
{
FileInfo file = new FileInfo(filePath);
if (file.Exists && SupportedExtensions.Any(x => x.OrdinalEquals(file.Extension)))
{
try
{
image.Tag = filePath;
PreviewedFilePaths.Add(filePath);
int hashCode = image.GetHashCode();
if (!ImageReferences.ContainsKey(hashCode))
{
ImageReferences.Add(hashCode, new WeakReference <Image>(image));
image.Unloaded += (x, y) => { PreviewedFilePaths.Remove(image.Tag?.ToString()); };
}
if (file.Length > 1048576)
{
image.Visibility = Visibility.Collapsed;
}
image.Tag = file.FullName;
image.Source = await ReadImageAsync(file.FullName);
}
finally
{
image.Visibility = Visibility.Visible;
}
}
}
else
{
image.Tag = null;
image.Source = null;
}
}
protected override void OnDragEnter(DragEventArgs e)
{
base.OnDragEnter(e);
e.Effect = DragDropEffects.None;
if (!e.Data.GetDataPresent(DataFormats.FileDrop))
{
return;
}
var items = (string[])e.Data.GetData(DataFormats.FileDrop);
if (items.Length != 1)
{
return;
}
string path = items[0];
if (SupportedExtensions.Any(p => Path.GetExtension(path) == p))
{
e.Effect = DragDropEffects.Copy;
}
}
/// <summary>
/// Returns a value indicating whether or not there is an importer for the given extension
/// </summary>
public static bool IsValidMovieExtension(string extension)
{
return(SupportedExtensions.Any(e => string.Equals(extension, e, StringComparison.OrdinalIgnoreCase)));
}