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!7

static new CirclesAndLines cal;
static Canvas canvas;

p-substance {
  canvas = cal.show();
  addToWindow(canvas, withMargin(jcenteredline(
    jbutton("New Circle...", f newCircle))));
}

svoid newCircle {
  final JTextField text = jtextfield();
  showFormTitled("New Circle", "Text", text, r-thread {
    cal.circle_autoVis(getTextTrim(text), random(0.2, 0.8), random(0.2, 0.8));
    canvas.update();
  });
}