/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="source">関連付けるWebImageオブジェクト</param>
/// <param name="visionApiSubscriptionKey">Microsoft Vision API のSubscription Key</param>
/// <param name="logger">ログメッセージ通知オブジェクト</param>
public WebImageViewModel(WebImage source, string visionApiSubscriptionKey, ILogger logger)
{
this.source = source;
this.logger = logger;
this.visionApiSubscriptionKey = visionApiSubscriptionKey;
//Model(WebImage)のプロパティをReactivePropertyに変換
Thumbnail = source.ObserveProperty(x => x.Thumbnail).ToReadOnlyReactiveProperty();
DisplayImage = source.ObserveProperty(x => x.DisplayImage).ToReadOnlyReactiveProperty();
Overlay = source.ObserveProperty(x => x.Overlay).ToReadOnlyReactiveProperty();
SourceUrl = source.ObserveProperty(x => x.SourceUrl).ToReadOnlyReactiveProperty();
SourceTitle = source.ObserveProperty(x => x.SourceTitle).ToReadOnlyReactiveProperty();
ImageProperty = source.ObserveProperty(x => x.ImageProperty).ToReadOnlyReactiveProperty();
//実行中フラグ
IsProcessing = progress.IsProcessingObservable.StartWith(false)
.ToReadOnlyReactiveProperty();
//プログレスバーの表示切替 - 実行中のみ表示する
ProgressVisibility = IsProcessing
.Select(x => x ? Visibility.Visible : Visibility.Collapsed)
.ToReadOnlyReactiveProperty();
//画像のサイズ変更時に実行するコマンド
SizeChangedCommand = new ReactiveCommand<Size>();
SizeChangedCommand
.DistinctUntilChanged()
.Throttle(TimeSpan.FromMilliseconds(200))
.Subscribe(size =>
{
//現在のサイズで 顔領域の矩形を再描画
source.DrawFaceRect(size);
//最新のサイズを保存しておく ⇒画像再選択時に使う
imageSize = size;
})
.AddTo(disposables);
//リンク元ページURLのハイパーリンククリック時
NavigateCommand = new ReactiveCommand();
NavigateCommand.Subscribe(_ =>
{
Process.Start(source.SourceUrl);
}).AddTo(disposables);
}
