private void previewTimer_Tick(object sender, EventArgs e)
{
// Stop the timer - the user has to make a further change to the entered path
// in order to rework the auto-preview
previewTimer.Stop();
okButton.Enabled = false;
// If there's any problem working out the preview, we won't draw the path
m_DrawPath = false;
try
{
// Don't use ParsePath, as that may display a message box
string str = GetEnteredPath();
m_Items = PathParser.GetPathItems(str, EditingController.Current.EntryUnit);
if (m_Items.Length > 0)
{
Leg[] legs = PathParser.CreateLegs(m_Items);
m_PathData = new PathInfo(m_From, m_To, legs);
double prec = m_PathData.Precision;
if (Math.Abs(prec) < MathConstants.TINY)
{
previewLabel.Text = "Exact fit";
}
else
{
previewLabel.Text = String.Format("1:{0}", (uint)prec);
}
m_DrawPath = true;
m_Command.ErasePainting();
okButton.Enabled = true;
}
}
// Indicate that the path cannot be parsed (in the case of an ApplicationException, assume
// the exception message is informational).
catch (ApplicationException ae)
{
previewLabel.Text = ae.Message;
}
catch (Exception)
{
previewLabel.Text = "Cannot generate preview";
}
}
/// <summary>
/// Parses the string that represents the path description.
/// </summary>
/// <param name="str">The string to parse</param>
/// <returns>True if the supplied string is understandable</returns>
bool ParseString(string str)
{
try
{
m_Items = PathParser.GetPathItems(str, EditingController.Current.EntryUnit);
return(true);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return(false);
}