/// <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>
/// 手描きの入力が移動しているときに呼び出す.
/// </summary>
/// <param name="pointer"></param>
private void MoveStroke(MoveStrokeTrace trace)
{
var elem = GetCanvasElement <Windows.UI.Xaml.Shapes.Polyline>(trace.Index);
if (elem == null)
{
return;
}
elem.Points.Add(trace.Position);
}
/// <summary>
/// 手描き描画用CanvasのPointerMovedイベントを処理する.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MainCanvas_PointerMoved(object sender, PointerRoutedEventArgs e)
{
// 編集中以外は無視する
if (!this.isEditingInternal)
{
return;
}
Windows.UI.Xaml.Shapes.Polyline line;
if (!this.pressedPointerDictionay.TryGetValue(e.Pointer.PointerId, out line))
{
BeginStrokeTrace beginTrace;
if (!this.strokeCandidateDictionary.TryGetValue(e.Pointer.PointerId, out beginTrace))
{
return;
}
if (!CallBeginTraceIfMovingEnough(e))
{
return;
}
if (!this.pressedPointerDictionay.TryGetValue(e.Pointer.PointerId, out line))
{
return;
}
}
var pointerPoint = e.GetCurrentPoint(this.MainCanvas);
var trace = new MoveStrokeTrace()
{
Index = (uint)line.Tag,
Position = pointerPoint.Position,
Timestamp = DateTimeOffset.UtcNow.Ticks,
};
// this.Item.InputRecorder.Add(trace);
this.inputRecorderForNewTrace.Add(trace);
MoveStroke(trace);
}