java.lang.Object
- java.awt.Component
- - java.awt.Container
  - - javax.swing.JComponent
    - - javax.swing.JPanel
      - org.fife.ui.rtextarea.Gutter

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible
```
public class Gutter
extends JPanel
```
The gutter is the component on the left-hand side of the text area that displays optional information such as line numbers, fold regions, and icons (for bookmarks, debugging breakpoints, error markers, etc.).
Icons can be added on a per-line basis to visually mark syntax errors, lines with breakpoints set on them, etc. To add icons to the gutter, you must first call RTextScrollPane.setIconRowHeaderEnabled(boolean) on the parent scroll pane, to make the icon area visible. Then, you can add icons that track either lines in the document, or offsets, via addLineTrackingIcon(int, Icon) and addOffsetTrackingIcon(int, Icon), respectively. To remove an icon you've added, use removeTrackingIcon(GutterIconInfo).
In addition to support for arbitrary per-line icons, this component also has built-in support for displaying icons representing "bookmarks;" that is, lines a user can cycle through via F2 and Shift+F2. Bookmarked lines are toggled via Ctrl+F2. In order to enable bookmarking, you must first assign an icon to represent a bookmarked line, then actually enable the feature:
```
 Gutter gutter = scrollPane.getGutter();
 gutter.setBookmarkIcon(new ImageIcon("bookmark.png"));
 gutter.setBookmarkingEnabled(true);
 
```
See Also:

GutterIconInfo, Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from class javax.swing.JPanel
  JPanel.AccessibleJPanel
- Nested classes/interfaces inherited from class javax.swing.JComponent
  JComponent.AccessibleJComponent
- Nested classes/interfaces inherited from class java.awt.Container
  Container.AccessibleAWTContainer
- Nested classes/interfaces inherited from class java.awt.Component
  Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

Fields
Modifier and Type Field Description

static Color DEFAULT_ACTIVE_LINE_RANGE_COLOR
The color used to highlight active line ranges if none is specified.
- Fields inherited from class javax.swing.JComponent
  listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
- Fields inherited from class java.awt.Component
  accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
- Fields inherited from interface java.awt.image.ImageObserver
  ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors
Constructor Description

Gutter(RTextArea textArea)
Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`GutterIconInfo`	`addLineTrackingIcon(int line, Icon icon)`	Adds an icon that tracks an offset in the document, and is displayed adjacent to the line numbers.
`GutterIconInfo`	`addLineTrackingIcon(int line, Icon icon, String tip)`	Adds an icon that tracks an offset in the document, and is displayed adjacent to the line numbers.
`GutterIconInfo`	`addOffsetTrackingIcon(int offs, Icon icon)`	Adds an icon that tracks an offset in the document, and is displayed adjacent to the line numbers.
`GutterIconInfo`	`addOffsetTrackingIcon(int offs, Icon icon, String tip)`	Adds an icon that tracks an offset in the document, and is displayed adjacent to the line numbers.
`Color`	`getActiveLineRangeColor()`	Returns the color used to paint the active line range, if any.
`Icon`	`getBookmarkIcon()`	Returns the icon to use for bookmarks.
`GutterIconInfo[]`	`getBookmarks()`	Returns the bookmarks known to this gutter.
`Color`	`getBorderColor()`	Returns the color of the "border" line.
`Color`	`getFoldBackground()`	Returns the background color used by the (default) fold icons.
`Color`	`getFoldIndicatorForeground()`	Returns the foreground color of the fold indicator.
`boolean`	`getIconRowHeaderInheritsGutterBackground()`	Returns whether the icon area inherits the gutter background (as opposed to painting with its own, default "panel" color, which is the default).
`Color`	`getLineNumberColor()`	Returns the color to use to paint line numbers.
`Font`	`getLineNumberFont()`	Returns the font used for line numbers.
`int`	`getLineNumberingStartIndex()`	Returns the starting line's line number.
`boolean`	`getLineNumbersEnabled()`	Returns `true` if the line numbers are enabled and visible.
`boolean`	`getShowCollapsedRegionToolTips()`	Returns whether tool tips are displayed showing the contents of collapsed fold regions when the mouse hovers over a +/- icon.
`GutterIconInfo[]`	`getTrackingIcons(Point p)`	Returns the tracking icons at the specified view position.
`boolean`	`isBookmarkingEnabled()`	Returns whether bookmarking is enabled.
`boolean`	`isFoldIndicatorEnabled()`	Returns whether the fold indicator is enabled.
`boolean`	`isIconRowHeaderEnabled()`	Returns whether the icon row header is enabled.
`void`	`removeAllTrackingIcons()`	Removes all tracking icons.
`void`	`removeTrackingIcon(GutterIconInfo tag)`	Removes the specified tracking icon.
`void`	`setActiveLineRangeColor(Color color)`	Sets the color to use to render active line ranges.
`void`	`setBookmarkIcon(Icon icon)`	Sets the icon to use for bookmarks.
`void`	`setBookmarkingEnabled(boolean enabled)`	Sets whether bookmarking is enabled.
`void`	`setBorder(Border border)`
`void`	`setBorderColor(Color color)`	Sets the color for the "border" line.
`void`	`setComponentOrientation(ComponentOrientation o)`
`void`	`setFoldBackground(Color bg)`	Sets the background color used by the (default) fold icons.
`void`	`setFoldIcons(Icon collapsedIcon, Icon expandedIcon)`	Sets the icons to use to represent collapsed and expanded folds.
`void`	`setFoldIndicatorEnabled(boolean enabled)`	Toggles whether the fold indicator is enabled.
`void`	`setFoldIndicatorForeground(Color fg)`	Sets the foreground color used by the fold indicator.
`void`	`setIconRowHeaderInheritsGutterBackground(boolean inherits)`	Sets whether the icon area inherits the gutter background (as opposed to painting with its own, default "panel" color, which is the default).
`void`	`setLineNumberColor(Color color)`	Sets the color to use to paint line numbers.
`void`	`setLineNumberFont(Font font)`	Sets the font used for line numbers.
`void`	`setLineNumberingStartIndex(int index)`	Sets the starting line's line number.
`void`	`setShowCollapsedRegionToolTips(boolean show)`	Toggles whether tool tips should be displayed showing the contents of collapsed fold regions when the mouse hovers over a +/- icon.
`boolean`	`toggleBookmark(int line)`	Programatically toggles whether there is a bookmark for the specified line.

Methods inherited from class javax.swing.JPanel
getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class javax.swing.JComponent
addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - DEFAULT_ACTIVE_LINE_RANGE_COLOR
```
public static final Color DEFAULT_ACTIVE_LINE_RANGE_COLOR
```
    The color used to highlight active line ranges if none is specified.
- Constructor Detail
  - Gutter
```
public Gutter(RTextArea textArea)
```
    Constructor.
    
    Parameters:
    
    textArea - The parent text area.
- Method Detail
  - addLineTrackingIcon
```
public GutterIconInfo addLineTrackingIcon(int line,
                                          Icon icon)
                                   throws BadLocationException
```
    Adds an icon that tracks an offset in the document, and is displayed adjacent to the line numbers. This is useful for marking things such as source code errors.
    
    Parameters:
    
    line - The line to track (zero-based).
    
    icon - The icon to display. This should be small (say 16x16).
    
    Returns:
    
    A tag for this icon. This can later be used in a call to removeTrackingIcon(GutterIconInfo) to remove this icon.
    
    Throws:
    
    BadLocationException - If offs is an invalid offset into the text area.
    
    See Also:
    
    addLineTrackingIcon(int, Icon, String), addOffsetTrackingIcon(int, Icon), removeTrackingIcon(GutterIconInfo)
  - addLineTrackingIcon
```
public GutterIconInfo addLineTrackingIcon(int line,
                                          Icon icon,
                                          String tip)
                                   throws BadLocationException
```
    Adds an icon that tracks an offset in the document, and is displayed adjacent to the line numbers. This is useful for marking things such as source code errors.
    
    Parameters:
    
    line - The line to track (zero-based).
    
    icon - The icon to display. This should be small (say 16x16).
    
    tip - An optional tool tip for the icon.
    
    Returns:
    
    A tag for this icon. This can later be used in a call to removeTrackingIcon(GutterIconInfo) to remove this icon.
    
    Throws:
    
    BadLocationException - If offs is an invalid offset into the text area.
    
    See Also:
    
    addLineTrackingIcon(int, Icon), addOffsetTrackingIcon(int, Icon), removeTrackingIcon(GutterIconInfo)
  - addOffsetTrackingIcon
```
public GutterIconInfo addOffsetTrackingIcon(int offs,
                                            Icon icon)
                                     throws BadLocationException
```
    Adds an icon that tracks an offset in the document, and is displayed adjacent to the line numbers. This is useful for marking things such as source code errors.
    
    Parameters:
    
    offs - The offset to track.
    
    icon - The icon to display. This should be small (say 16x16).
    
    Returns:
    
    A tag for this icon.
    
    Throws:
    
    BadLocationException - If offs is an invalid offset into the text area.
    
    See Also:
    
    addOffsetTrackingIcon(int, Icon, String), addLineTrackingIcon(int, Icon), removeTrackingIcon(GutterIconInfo)
  - addOffsetTrackingIcon
```
public GutterIconInfo addOffsetTrackingIcon(int offs,
                                            Icon icon,
                                            String tip)
                                     throws BadLocationException
```
    Adds an icon that tracks an offset in the document, and is displayed adjacent to the line numbers. This is useful for marking things such as source code errors.
    
    Parameters:
    
    offs - The offset to track.
    
    icon - The icon to display. This should be small (say 16x16).
    
    tip - An optional tool tip for the icon.
    
    Returns:
    
    A tag for this icon.
    
    Throws:
    
    BadLocationException - If offs is an invalid offset into the text area.
    
    See Also:
    
    addOffsetTrackingIcon(int, Icon), addLineTrackingIcon(int, Icon), removeTrackingIcon(GutterIconInfo)
  - getActiveLineRangeColor
```
public Color getActiveLineRangeColor()
```
    Returns the color used to paint the active line range, if any.
    
    Returns:
    
    The color.
    
    See Also:
    
    setActiveLineRangeColor(Color)
  - getBookmarkIcon
```
public Icon getBookmarkIcon()
```
    Returns the icon to use for bookmarks.
    
    Returns:
    
    The icon to use for bookmarks. If this is null, bookmarking is effectively disabled.
    
    See Also:
    
    setBookmarkIcon(Icon), isBookmarkingEnabled()
  - getBookmarks
```
public GutterIconInfo[] getBookmarks()
```
    Returns the bookmarks known to this gutter.
    
    Returns:
    
    The bookmarks. If there are no bookmarks, an empty array is returned.
    
    See Also:
    
    toggleBookmark(int)
  - getBorderColor
```
public Color getBorderColor()
```
    Returns the color of the "border" line.
    
    Returns:
    
    The color.
    
    See Also:
    
    setBorderColor(Color)
  - getFoldBackground
```
public Color getFoldBackground()
```
    Returns the background color used by the (default) fold icons.
    
    Returns:
    
    The background color.
    
    See Also:
    
    setFoldBackground(Color)
  - getFoldIndicatorForeground
```
public Color getFoldIndicatorForeground()
```
    Returns the foreground color of the fold indicator.
    
    Returns:
    
    The foreground color of the fold indicator.
    
    See Also:
    
    setFoldIndicatorForeground(Color)
  - getIconRowHeaderInheritsGutterBackground
```
public boolean getIconRowHeaderInheritsGutterBackground()
```
    Returns whether the icon area inherits the gutter background (as opposed to painting with its own, default "panel" color, which is the default).
    
    Returns:
    
    Whether the gutter background is used in the icon row header.
    
    See Also:
    
    setIconRowHeaderInheritsGutterBackground(boolean)
  - getLineNumberColor
```
public Color getLineNumberColor()
```
    Returns the color to use to paint line numbers.
    
    Returns:
    
    The color used when painting line numbers.
    
    See Also:
    
    setLineNumberColor(Color)
  - getLineNumberFont
```
public Font getLineNumberFont()
```
    Returns the font used for line numbers.
    
    Returns:
    
    The font used for line numbers.
    
    See Also:
    
    setLineNumberFont(Font)
  - getLineNumberingStartIndex
```
public int getLineNumberingStartIndex()
```
    Returns the starting line's line number. The default value is 1.
    
    Returns:
    
    The index
    
    See Also:
    
    setLineNumberingStartIndex(int)
  - getLineNumbersEnabled
```
public boolean getLineNumbersEnabled()
```
    Returns true if the line numbers are enabled and visible.
    
    Returns:
    
    Whether or not line numbers are visible.
  - getShowCollapsedRegionToolTips
```
public boolean getShowCollapsedRegionToolTips()
```
    Returns whether tool tips are displayed showing the contents of collapsed fold regions when the mouse hovers over a +/- icon.
    
    Returns:
    
    Whether these tool tips are displayed.
    
    See Also:
    
    setShowCollapsedRegionToolTips(boolean)
  - getTrackingIcons
```
public GutterIconInfo[] getTrackingIcons(Point p)
                                  throws BadLocationException
```
    Returns the tracking icons at the specified view position.
    
    Parameters:
    
    p - The view position.
    
    Returns:
    
    The tracking icons at that position. If there are no tracking icons there, this will be an empty array.
    
    Throws:
    
    BadLocationException - If p is invalid.
  - isFoldIndicatorEnabled
```
public boolean isFoldIndicatorEnabled()
```
    Returns whether the fold indicator is enabled.
    
    Returns:
    
    Whether the fold indicator is enabled.
    
    See Also:
    
    setFoldIndicatorEnabled(boolean)
  - isBookmarkingEnabled
```
public boolean isBookmarkingEnabled()
```
    Returns whether bookmarking is enabled.
    
    Returns:
    
    Whether bookmarking is enabled.
    
    See Also:
    
    setBookmarkingEnabled(boolean)
  - isIconRowHeaderEnabled
```
public boolean isIconRowHeaderEnabled()
```
    Returns whether the icon row header is enabled.
    
    Returns:
    
    Whether the icon row header is enabled.
  - removeAllTrackingIcons
```
public void removeAllTrackingIcons()
```
    Removes all tracking icons.
    
    See Also:
    
    removeTrackingIcon(GutterIconInfo), addOffsetTrackingIcon(int, Icon)
  - removeTrackingIcon
```
public void removeTrackingIcon(GutterIconInfo tag)
```
    Removes the specified tracking icon.
    
    Parameters:
    
    tag - A tag for an icon in the gutter, as returned from either addLineTrackingIcon(int, Icon) or addOffsetTrackingIcon(int, Icon).
    
    See Also:
    
    removeAllTrackingIcons(), addLineTrackingIcon(int, Icon), addOffsetTrackingIcon(int, Icon)
  - setActiveLineRangeColor
```
public void setActiveLineRangeColor(Color color)
```
    Sets the color to use to render active line ranges.
    
    Parameters:
    
    color - The color to use. If this is null, then the default color is used.
    
    See Also:
    
    getActiveLineRangeColor(), DEFAULT_ACTIVE_LINE_RANGE_COLOR
  - setBookmarkIcon
```
public void setBookmarkIcon(Icon icon)
```
    Sets the icon to use for bookmarks.
    
    Parameters:
    
    icon - The new bookmark icon. If this is null, bookmarking is effectively disabled.
    
    See Also:
    
    getBookmarkIcon(), isBookmarkingEnabled()
  - setBookmarkingEnabled
```
public void setBookmarkingEnabled(boolean enabled)
```
    Sets whether bookmarking is enabled. Note that a bookmarking icon must be set via setBookmarkIcon(Icon) before bookmarks are truly enabled.
    
    Parameters:
    
    enabled - Whether bookmarking is enabled.
    
    See Also:
    
    isBookmarkingEnabled(), setBookmarkIcon(Icon)
  - setBorderColor
```
public void setBorderColor(Color color)
```
    Sets the color for the "border" line.
    
    Parameters:
    
    color - The new color.
    
    See Also:
    
    getBorderColor()
  - setComponentOrientation
```
public void setComponentOrientation(ComponentOrientation o)
```
    Overrides:
    
    setComponentOrientation in class Component
  - setFoldIcons
```
public void setFoldIcons(Icon collapsedIcon,
                         Icon expandedIcon)
```
    Sets the icons to use to represent collapsed and expanded folds.
    
    Parameters:
    
    collapsedIcon - The collapsed fold icon. This cannot be null.
    
    expandedIcon - The expanded fold icon. This cannot be null.
  - setFoldIndicatorEnabled
```
public void setFoldIndicatorEnabled(boolean enabled)
```
    Toggles whether the fold indicator is enabled.
    
    Parameters:
    
    enabled - Whether the fold indicator should be enabled.
    
    See Also:
    
    isFoldIndicatorEnabled()
  - setFoldBackground
```
public void setFoldBackground(Color bg)
```
    Sets the background color used by the (default) fold icons.
    
    Parameters:
    
    bg - The new background color.
    
    See Also:
    
    getFoldBackground()
  - setFoldIndicatorForeground
```
public void setFoldIndicatorForeground(Color fg)
```
    Sets the foreground color used by the fold indicator.
    
    Parameters:
    
    fg - The new fold indicator foreground.
    
    See Also:
    
    getFoldIndicatorForeground()
  - setIconRowHeaderInheritsGutterBackground
```
public void setIconRowHeaderInheritsGutterBackground(boolean inherits)
```
    Sets whether the icon area inherits the gutter background (as opposed to painting with its own, default "panel" color, which is the default).
    
    Parameters:
    
    inherits - Whether the gutter background should be used in the icon row header. If this is false, a default, Look-and-feel-dependent color is used.
    
    See Also:
    
    getIconRowHeaderInheritsGutterBackground()
  - setLineNumberColor
```
public void setLineNumberColor(Color color)
```
    Sets the color to use to paint line numbers.
    
    Parameters:
    
    color - The color to use when painting line numbers.
    
    See Also:
    
    getLineNumberColor()
  - setLineNumberFont
```
public void setLineNumberFont(Font font)
```
    Sets the font used for line numbers.
    
    Parameters:
    
    font - The font to use. This cannot be null.
    
    See Also:
    
    getLineNumberFont()
  - setLineNumberingStartIndex
```
public void setLineNumberingStartIndex(int index)
```
    Sets the starting line's line number. The default value is 1. Applications can call this method to change this value if they are displaying a subset of lines in a file, for example.
    
    Parameters:
    
    index - The new index.
    
    See Also:
    
    getLineNumberingStartIndex()
  - setShowCollapsedRegionToolTips
```
public void setShowCollapsedRegionToolTips(boolean show)
```
    Toggles whether tool tips should be displayed showing the contents of collapsed fold regions when the mouse hovers over a +/- icon.
    
    Parameters:
    
    show - Whether to show these tool tips.
    
    See Also:
    
    getShowCollapsedRegionToolTips()
  - toggleBookmark
```
public boolean toggleBookmark(int line)
                       throws BadLocationException
```
    Programatically toggles whether there is a bookmark for the specified line. If bookmarking is not enabled, this method does nothing.
    
    Parameters:
    
    line - The line.
    
    Returns:
    
    Whether a bookmark is now at the specified line.
    
    Throws:
    
    BadLocationException - If line is an invalid line number in the text area.
    
    See Also:
    
    getBookmarks()
  - setBorder
```
public void setBorder(Border border)
```
    Overrides:
    
    setBorder in class JComponent

Class Gutter

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JPanel

Nested classes/interfaces inherited from class javax.swing.JComponent

Nested classes/interfaces inherited from class java.awt.Container

Nested classes/interfaces inherited from class java.awt.Component

Field Summary

Fields inherited from class javax.swing.JComponent

Fields inherited from class java.awt.Component

Fields inherited from interface java.awt.image.ImageObserver

Constructor Summary

Method Summary

Methods inherited from class javax.swing.JPanel

Methods inherited from class javax.swing.JComponent

Methods inherited from class java.awt.Container

Methods inherited from class java.awt.Component

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_ACTIVE_LINE_RANGE_COLOR

Constructor Detail

Gutter

Method Detail

addLineTrackingIcon

addLineTrackingIcon

addOffsetTrackingIcon

addOffsetTrackingIcon

getActiveLineRangeColor

getBookmarkIcon

getBookmarks

getBorderColor

getFoldBackground

getFoldIndicatorForeground

getIconRowHeaderInheritsGutterBackground

getLineNumberColor

getLineNumberFont

getLineNumberingStartIndex

getLineNumbersEnabled

getShowCollapsedRegionToolTips

getTrackingIcons

isFoldIndicatorEnabled

isBookmarkingEnabled

isIconRowHeaderEnabled

removeAllTrackingIcons

removeTrackingIcon

setActiveLineRangeColor

setBookmarkIcon

setBookmarkingEnabled

setBorderColor

setComponentOrientation

setFoldIcons

setFoldIndicatorEnabled

setFoldBackground

setFoldIndicatorForeground

setIconRowHeaderInheritsGutterBackground

setLineNumberColor

setLineNumberFont

setLineNumberingStartIndex

setShowCollapsedRegionToolTips

toggleBookmark

setBorder