/// <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);
}
