/// <summary> /// 手描き描画用CanvasのRightTappedイベントを処理する. /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void MainCanvas_RightTapped(object sender, RightTappedRoutedEventArgs e) { // 編集中以外は無視する if (!this.isEditingInternal) { return; } var stroke = e.OriginalSource as Windows.UI.Xaml.Shapes.Polyline; if ((stroke == null) || (stroke.Tag == null)) { return; } e.Handled = true; var trace = new RemoveStrokeTrace() { Index = (uint)stroke.Tag, Timestamp = DateTimeOffset.UtcNow.Ticks, }; // this.Item.InputRecorder.Add(trace); this.inputRecorderForNewTrace.Add(trace); RemoveStroke(trace); }
/// <summary> /// 文字列にシリアライズされた手描き入力を復元する. /// </summary> /// <param name="text"></param> /// <returns></returns> private static InputTraceBase ParseTrace(string text) { JsonArray jsonArray; if (!JsonArray.TryParse(text, out jsonArray)) { return(null); } InputTraceKind kind; if (!Enum.TryParse(jsonArray.GetStringAt(0), out kind)) { return(null); } InputTraceBase trace; switch (kind) { case InputTraceKind.BeginStroke: trace = new BeginStrokeTrace(); break; case InputTraceKind.MoveStroke: trace = new MoveStrokeTrace(); break; case InputTraceKind.EndStroke: trace = new EndStrokeTrace(); break; case InputTraceKind.RemoveStroke: trace = new RemoveStrokeTrace(); break; case InputTraceKind.SetStrokeColor: trace = new SetStrokeColorTrace(); break; case InputTraceKind.SetStrokeThickness: trace = new SetStrokeThicknessTrace(); break; case InputTraceKind.SetBackgroundColor: trace = new SetBackgroundColorTrace(); break; case InputTraceKind.SetImage: trace = new SetImageTrace(); break; default: return(null); } trace.LoadFromJson(jsonArray); return(trace); }
/// <summary> /// 手描きの入力を削除する. /// </summary> /// <param name="index"></param> private void RemoveStroke(RemoveStrokeTrace trace) { var elem = GetCanvasElement <UIElement>(trace.Index); if (elem == null) { return; } this.MainCanvas.Children.Remove(elem); }