private void DrawSpirograph()
{
SetCanvasSize();
var halfCanvasWidth = SpiroCanvas.Width / 2;
if (SpirographSettings.IsSpirographRadiusLarger(halfCanvasWidth))
{
var warningDialog = new WarningDialog
{
Owner = this
};
//
// dialogResult is true when either the Previous or Draw button have been
// clicked. False is returned if the user clicked on the close dialog
// button.
//
var dialogResult = warningDialog.ShowDialog();
if (dialogResult.HasValue && dialogResult.Value == true)
{
if (warningDialog.Response == WarningResponse.UsePreviousSettings)
{
SpirographSettings = PreviousSettings;
}
}
//
// dialogResult is false and indicates that the user aborted
// changing the spirograph settings.
//
else
{
return;
}
}
SpiroCanvas.Children.Clear();
theSpirograph = new Spirograph(SpirographSettings);
theSpirograph.Draw(SpiroCanvas);
if (!SpirographSettings.IsSpirographRadiusLarger(halfCanvasWidth))
{
PreviousSettings = new SpirographSettings(SpirographSettings);
}
}
