Method showTrace

app/src/processing/app/Messages.java:123–150

Warning window that includes the stack trace.

(String title, String message,
                               Throwable t, boolean fatal)

   * Warning window that includes the stack trace.
   */
  static public void showTrace(String title, String message,
                               Throwable t, boolean fatal) {
    if (title == null) title = fatal ? "Error" : "Warning";

    if (Base.isCommandLine()) {
      System.err.println(title + ": " + message);
      if (t != null) {
        t.printStackTrace();
      }

    } else {
      StringWriter sw = new StringWriter();
      t.printStackTrace(new PrintWriter(sw));

      JOptionPane.showMessageDialog(new Frame(),
                                    // first <br/> clears to the next line
                                    // second <br/> is a shorter height blank space before the trace
                                    Toolkit.formatMessage(message + "<br/><tt><br/>" + sw + "</tt>"),
                                    title,
                                    fatal ?
                                    JOptionPane.ERROR_MESSAGE :
                                    JOptionPane.WARNING_MESSAGE);

      if (fatal) {
        System.exit(1);
      }
    }
  }


  static public int showYesNoQuestion(Frame editor, String title,