/// <summary>
/// 共有の<c>DataPackageView</c>からこのクラスのインスタンスを作成する.
/// </summary>
/// <param name="package">共有の<c>DataPackageView</c></param>
/// <returns>このクラスのインスタンス</returns>
public static async Task <SharedBitmapItem> CreateFromDataPackage(DataPackageView package)
{
if (package == null)
{
throw new ArgumentNullException("package");
}
if (!package.Contains(StandardDataFormats.Bitmap))
{
return(null);
}
var bmpStream = await package.GetBitmapAsync();
using (var bmpStreamWithContentType = await bmpStream.OpenReadAsync())
{
var bmpImage = new BitmapImage();
bmpImage.SetSource(bmpStreamWithContentType);
var item = new SharedBitmapItem(bmpImage);
await item.KeepSharedBitmapInfoAsync(bmpStreamWithContentType);
return(item);
}
}
/// <summary>
/// 共有データに含まれる画像とファイルを登録候補として追加する.
/// </summary>
/// <param name="shareOperation"></param>
private async Task AddSharedItemsAsync(ShareOperation shareOperation)
{
var bmpItem = await SharedBitmapItem.CreateFromDataPackage(shareOperation.Data);
if (bmpItem == null)
{
return;
}
this.mainCanvas.Item = new CanvasItem();
this.mainCanvas.IsEditing = true;
if (this.sharedItemCache == null)
{
this.sharedItemCache = new CameraCache("SharedItemCache");
await this.sharedItemCache.ClearAsync();
}
await bmpItem.PrepareFileAsync();
await this.sharedItemCache.MoveAndAddAsync(bmpItem.File);
await this.mainCanvas.SetImageAsync(bmpItem.File, true);
this.sharedBitmapItem = bmpItem;
}