How to use

setBackground

method

in

org.fife.ui.rtextarea.Gutter

/**
 * 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);
}

gutter.setBackground(gutterBackgroundColor);
gutter.setBorderColor(gutterBorderColor);
gutter.setActiveLineRangeColor(activeLineRangeColor);

gutter.setBackground(               new Color(Integer.parseInt(temaEditor.getString("background_editor"), 16)));
gutter.setBorderColor(              new Color(Integer.parseInt(temaEditor.getString("borda_barra_lateral"), 16)));
gutter.setLineNumberColor(          new Color(Integer.parseInt(temaEditor.getString("numeros_das_linhas"), 16)));

gutter.setBackground(Color.orange);
gutter.setBorderColor(Color.orange);
gutter.setActiveLineRangeColor(Color.orange);

/**
 * Constructor.
 *
 * @param textArea The parent text area.
 */
public Gutter(RTextArea textArea) {
  listener = new TextAreaListener();
  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);
  }
  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);
}

/**
 * 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);
}

getGutter().setBackground(new Color(0, 0, 0, 0));

gutter.setBackground(gutterBackgroundColor);
gutter.setBorderColor(gutterBorderColor);
gutter.setActiveLineRangeColor(activeLineRangeColor);