How to use

setFoldIndicatorEnabled

method

in

org.fife.ui.rtextarea.Gutter

/**
 * Toggles whether the fold indicator is enabled.
 *
 * @param enabled Whether the fold indicator should be enabled.
 * @see #isFoldIndicatorEnabled()
 */
public void setFoldIndicatorEnabled(boolean enabled) {
  gutter.setFoldIndicatorEnabled(enabled);
  checkGutterVisibility();
}

setFoldIndicatorEnabled(foldingEnabled);

/**
 * Constructor.
 *
 * @param textArea The parent text area.
 */
public Gutter(RTextArea textArea) {
  listener = new TextAreaListener();
  lineNumberColor = Color.gray;
  lineNumberFont = RTextArea.getDefaultFont();
  lineNumberingStartIndex = 1;
  iconRowHeaderInheritsGutterBackground = false;
  setTextArea(textArea);
  setLayout(new BorderLayout());
  if (this.textArea!=null) {
    // Enable line numbers our first time through if they give us
    // a text area.
    setLineNumbersEnabled(true);
    if (this.textArea instanceof RSyntaxTextArea) {
      RSyntaxTextArea rsta = (RSyntaxTextArea)this.textArea;
      setFoldIndicatorEnabled(rsta.isCodeFoldingEnabled());
    }
  }
  setBorder(new GutterBorder(0, 0, 0, 1)); // Assume ltr
  Color bg = null;
  if (textArea!=null) {
    bg = textArea.getBackground(); // May return null if image bg
  }
  setBackground(bg!=null ? bg : Color.WHITE);
}

@Test
public void testSetFoldIndicatorEnabled() {
  RTextArea textArea = new RTextArea(PLAIN_TEXT);
  Gutter gutter = new Gutter(textArea);
  Assert.assertFalse(gutter.isFoldIndicatorEnabled());
  gutter.setFoldIndicatorEnabled(true);
  Assert.assertTrue(gutter.isFoldIndicatorEnabled());
  gutter.setFoldIndicatorEnabled(false);
  Assert.assertFalse(gutter.isFoldIndicatorEnabled());
}

@Test
public void testIsFoldIndicatorEnabled() {
  RTextArea textArea = new RTextArea(PLAIN_TEXT);
  Gutter gutter = new Gutter(textArea);
  Assert.assertFalse(gutter.isFoldIndicatorEnabled());
  gutter.setFoldIndicatorEnabled(true);
  Assert.assertTrue(gutter.isFoldIndicatorEnabled());
}

/**
 * Toggles whether the fold indicator is enabled.
 *
 * @param enabled Whether the fold indicator should be enabled.
 * @see #isFoldIndicatorEnabled()
 */
public void setFoldIndicatorEnabled(boolean enabled) {
  gutter.setFoldIndicatorEnabled(enabled);
  checkGutterVisibility();
}

setFoldIndicatorEnabled(foldingEnabled);

/**
 * Constructor.
 *
 * @param textArea The parent text area.
 */
public Gutter(RTextArea textArea) {
  listener = new TextAreaListener();
  lineNumberColor = Color.gray;
  lineNumberFont = RTextArea.getDefaultFont();
  lineNumberingStartIndex = 1;
  iconRowHeaderInheritsGutterBackground = false;
  setTextArea(textArea);
  setLayout(new BorderLayout());
  if (this.textArea!=null) {
    // Enable line numbers our first time through if they give us
    // a text area.
    setLineNumbersEnabled(true);
    if (this.textArea instanceof RSyntaxTextArea) {
      RSyntaxTextArea rsta = (RSyntaxTextArea)this.textArea;
      setFoldIndicatorEnabled(rsta.isCodeFoldingEnabled());
    }
  }
  setBorder(new GutterBorder(0, 0, 0, 1)); // Assume ltr
  Color bg = null;
  if (textArea!=null) {
    bg = textArea.getBackground(); // May return null if image bg
  }
  setBackground(bg!=null ? bg : Color.WHITE);
}