How to use

setLineNumberFont

method

in

org.fife.ui.rtextarea.Gutter

@Test
public void testSetLineNumberFont() {
  RTextArea textArea = new RTextArea(PLAIN_TEXT);
  Gutter gutter = new Gutter(textArea);
  Font font = new Font("Comic Sans", Font.PLAIN, 13);
  gutter.setLineNumberFont(font);
  Assert.assertEquals(font, gutter.getLineNumberFont());
  font = new Font("Arial", Font.ITALIC, 22);
  gutter.setLineNumberFont(font);
  Assert.assertEquals(font, gutter.getLineNumberFont());
}

/**
 * Creates a scroll pane.
 *
 * @param comp The component this scroll pane should display.  This should
 *        be an instance of {@link RTextArea},
 *        <code>javax.swing.JLayer</code> (or the older
 *        <code>org.jdesktop.jxlayer.JXLayer</code>), or <code>null</code>.
 *        If this argument is <code>null</code>, you must call
 *        {@link #setViewportView(Component)}, passing in an instance of
 *        one of the types above.
 * @param lineNumbers Whether line numbers are initially enabled.
 * @param lineNumberColor The color to use for line numbers.
 */
public RTextScrollPane(Component comp, boolean lineNumbers,
            Color lineNumberColor) {
  super(comp);
  RTextArea textArea = getFirstRTextAreaDescendant(comp);
  // Create the gutter for this document.
  Font defaultFont = new Font("Monospaced", Font.PLAIN, 12);
  gutter = new Gutter(textArea);
  gutter.setLineNumberFont(defaultFont);
  gutter.setLineNumberColor(lineNumberColor);
  setLineNumbersEnabled(lineNumbers);
  // Set miscellaneous properties.
  setVerticalScrollBarPolicy(VERTICAL_SCROLLBAR_ALWAYS);
  setHorizontalScrollBarPolicy(HORIZONTAL_SCROLLBAR_AS_NEEDED);
}

@Test
public void testGetLineNumberFont() {
  RTextArea textArea = new RTextArea(PLAIN_TEXT);
  Gutter gutter = new Gutter(textArea);
  Font font = new Font("Comic Sans", Font.PLAIN, 13);
  gutter.setLineNumberFont(font);
  Assert.assertEquals(font, gutter.getLineNumberFont());
  font = new Font("Arial", Font.ITALIC, 22);
  gutter.setLineNumberFont(font);
  Assert.assertEquals(font, gutter.getLineNumberFont());
}

@Test(expected = IllegalArgumentException.class)
public void testSetLineNumberFont_NullArg() {
  RTextArea textArea = new RTextArea(PLAIN_TEXT);
  Gutter gutter = new Gutter(textArea);
  gutter.setLineNumberFont(null);
}

  baseFont.getSize();
Font font = getFont(fontName, Font.PLAIN, fontSize);
gutter.setLineNumberFont(font);
gutter.setFoldIndicatorForeground(foldIndicatorFG);
gutter.setFoldBackground(foldBG);

/**
 * Creates a scroll pane with preferred size (width, height).
 *
 * @param area The text area this scroll pane will contain.  If this is
 *        <code>null</code>, you must call
 *        {@link #setViewportView(Component)}, passing in an
 *        {@link RTextArea}.
 * @param lineNumbers Whether line numbers are initially enabled.
 * @param lineNumberColor The color to use for line numbers.
 */
public RTextScrollPane(RTextArea area, boolean lineNumbers,
            Color lineNumberColor) {
  super(area);
  // Create the text area and set it inside this scroll bar area.
  textArea = area;
  // Create the gutter for this document.
  Font defaultFont = new Font("Monospaced", Font.PLAIN, 12);
  gutter = new Gutter(textArea);
  gutter.setLineNumberFont(defaultFont);
  gutter.setLineNumberColor(lineNumberColor);
  setLineNumbersEnabled(lineNumbers);
  // Set miscellaneous properties.
  setVerticalScrollBarPolicy(VERTICAL_SCROLLBAR_ALWAYS);
  setHorizontalScrollBarPolicy(HORIZONTAL_SCROLLBAR_AS_NEEDED);
}

/**
 * Creates a scroll pane with preferred size (width, height).
 *
 * @param area The text area this scroll pane will contain.  If this is
 *        <code>null</code>, you must call
 *        {@link #setViewportView(Component)}, passing in an
 *        {@link RTextArea}.
 * @param lineNumbers Whether line numbers are initially enabled.
 * @param lineNumberColor The color to use for line numbers.
 */
public RTextScrollPane(RTextArea area, boolean lineNumbers,
            Color lineNumberColor) {
  super(area);
  // Create the text area and set it inside this scroll bar area.
  textArea = area;
  // Create the gutter for this document.
  Font defaultFont = new Font("Monospaced", Font.PLAIN, 12);
  gutter = new Gutter(textArea);
  gutter.setLineNumberFont(defaultFont);
  gutter.setLineNumberColor(lineNumberColor);
  setLineNumbersEnabled(lineNumbers);
  // Set miscellaneous properties.
  setVerticalScrollBarPolicy(VERTICAL_SCROLLBAR_ALWAYS);
  setHorizontalScrollBarPolicy(HORIZONTAL_SCROLLBAR_AS_NEEDED);
}

gutter.setIconRowHeaderInheritsGutterBackground(!gutter.getIconRowHeaderInheritsGutterBackground());
gutter.setLineNumberColor(Color.orange);
gutter.setLineNumberFont(font);
gutter.setFoldIndicatorForeground(Color.orange);
gutter.setFoldBackground(Color.orange);

/**
 * Creates a scroll pane.
 *
 * @param comp The component this scroll pane should display.  This should
 *        be an instance of {@link RTextArea},
 *        <code>javax.swing.JLayer</code> (or the older
 *        <code>org.jdesktop.jxlayer.JXLayer</code>), or <code>null</code>.
 *        If this argument is <code>null</code>, you must call
 *        {@link #setViewportView(Component)}, passing in an instance of
 *        one of the types above.
 * @param lineNumbers Whether line numbers are initially enabled.
 * @param lineNumberColor The color to use for line numbers.
 */
public RTextScrollPane(Component comp, boolean lineNumbers,
            Color lineNumberColor) {
  super(comp);
  RTextArea textArea = getFirstRTextAreaDescendant(comp);
  // Create the gutter for this document.
  Font defaultFont = new Font("Monospaced", Font.PLAIN, 12);
  gutter = new Gutter(textArea);
  gutter.setLineNumberFont(defaultFont);
  gutter.setLineNumberColor(lineNumberColor);
  setLineNumbersEnabled(lineNumbers);
  // Set miscellaneous properties.
  setVerticalScrollBarPolicy(VERTICAL_SCROLLBAR_ALWAYS);
  setHorizontalScrollBarPolicy(HORIZONTAL_SCROLLBAR_AS_NEEDED);
}

  baseFont.getSize();
Font font = getFont(fontName, Font.PLAIN, fontSize);
gutter.setLineNumberFont(font);
gutter.setFoldIndicatorForeground(foldIndicatorFG);
gutter.setFoldBackground(foldBG);