public void Test_CanvasGeometry_3()
{
CanvasDevice device = new CanvasDevice();
Assert.IsNotNull(device, "Could not create CanvasDevice instance.");
const string sample = "F1 M 331.341,81.975 L 398.766,218.593 L 549.533,240.500 L 440.437,346.842 L 466.191,497.000 L 331.341,426.105 L 196.491,497.000 L 222.245,346.842 L 113.150,240.500 L 263.916,218.593 L 331.341,81.975 Z S A M P L E E R R O R";
var geometry = CanvasPathGeometry.CreateGeometry(device, sample);
}
private void OnCanvasDraw(CanvasControl sender, CanvasDrawEventArgs args)
{
if (string.IsNullOrWhiteSpace(_data))
{
CommandsList.Text = string.Empty;
return;
}
this._errorGeometry ??= CanvasPathGeometry.CreateGeometry(sender, ErrorString);
_logger?.Clear();
CommandsList.Text = string.Empty;
try
{
_logger?.AppendLine("// The following commands represent the CanvasPathBuilder command(s) needed");
_logger?.AppendLine("// to create the CanvasGeometry from the specified Win2d Path Mini Language.");
var geometry = CanvasPathGeometry.CreateGeometry(sender, _data);
_reader.StartLogging();
geometry.SendPathTo(_reader);
_logger?.AppendLine(_reader.EndLogging());
CommandsList.Text = _logger?.ToString() ?? string.Empty;
args.DrawingSession.FillGeometry(geometry, _fillColor);
args.DrawingSession.DrawGeometry(geometry, _strokeColor, _strokeThickness);
RootPivot.SelectedIndex = 0;
CommandsList.Foreground = _commandBrush;
}
catch (ArgumentException argEx)
{
var message = argEx.Message;
var errorCode = message.Substring(0, 11);
var parseError = string.Empty;
if (message.StartsWith(ParseError1))
{
parseError = "Parse Error: No matching data!";
}
else if (message.StartsWith(ParseError2))
{
parseError = "Parse Error: Multiple FillRule elements present in Path Data!";
}
else if (message.StartsWith(ParseError3))
{
var tokens = message.Split('\n', StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length == 3)
{
parseError = $"Parse Error at {tokens[1]}. Cannot parse '{tokens[2]}'.";
}
}
else
{
parseError = "Parsing error! Invalid input data!";
}
args.DrawingSession.FillGeometry(_errorGeometry, Colors.Black);
CommandsList.Text = parseError;
RootPivot.SelectedIndex = 1;
CommandsList.Foreground = _commandErrorBrush;
}
catch (Exception)
{
args.DrawingSession.FillGeometry(_errorGeometry, Colors.Black);
CommandsList.Text = "Parsing error! Invalid input data!";
RootPivot.SelectedIndex = 1;
CommandsList.Foreground = _commandErrorBrush;
}
}
