syntaxhighlight

Class JTextComponentRowHeader

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JPanel

syntaxhighlight.JTextComponentRowHeader

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible

public class JTextComponentRowHeader
extends JPanel

A row header panel for JScrollPane showing the line numbers of JTextComponent. The text lines in JTextComponent must be fixed height.

Author:

Chan Wai Shing

See Also:

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 and Description
protected Color	borderColor The color of the border that joint the gutter and the script text area.
protected int	borderWidth The width of the border that joint the gutter and the script text area.
protected Document	document The document of the text component.
protected DocumentListener	documentListener The document listener for document.
protected Color	highlightedColor The background of the row when it is highlighted.
protected List<Integer>	highlightedLineList The list of line numbers that indicate which lines are needed to be highlighted.
protected int	largestRowNumber The cached largest row number (for determine panel width panelWidth).
protected int	lineNumberOffset The line number offset.
protected boolean	listenToDocumentUpdate Indicator indicate whether it is listening to the document change events or not.
protected int	paddingLeft The minimum padding from 'the leftmost of the line number text' to 'the left margin'.
protected int	paddingRight The minimum padding from 'the rightmost of the line number text' to 'the right margin' (not to the gutter border).
protected int	panelWidth The cached panel width.
protected JScrollPane	scrollPane The JScrollPane that it be added into.
protected Object	textAntiAliasing The anti-aliasing setting of the line number text.
protected JTextComponent	textComponent The text component to listen the change events on.
protected int	textComponentHeight The cached text component height, for determine panel height.

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 and Description
JTextComponentRowHeader(JScrollPane scrollPane, JTextComponent textComponent) Constructor.

Method Summary

Modifier and Type	Method and Description
boolean	addHighlightedLine(int lineNumber) Add highlighted line.
void	checkPanelSize() Check whether the height of the row header panel match with the height of the text component or not.
void	clearHighlightedLine() Clear highlighted lines.
Color	getBorderColor() The color of the border that joint the gutter and the script text area.
int	getBorderWidth() The width of the border that joint the gutter and the script text area.
Color	getHighlightedColor() The background of the highlighted row.
List<Integer>	getHighlightedLineList() Get the list of highlighted lines.
int	getLineNumberOffset() Get the line number offset
int	getPaddingLeft() The minimum padding from the 'leftmost of the line number text' to the 'left margin'.
int	getPaddingRight() The minimum padding from the 'rightmost of the line number text' to the 'right margin' (not to the gutter border).
Dimension	getPreferredSize()
Object	getTextAntiAliasing() The anti-aliasing setting of the line number text.
boolean	isListenToDocumentUpdate() Check if it is listening to the document change events.
void	paint(Graphics g)
void	setBackground(Color background) The background of the panel.
void	setBorderColor(Color borderColor) The color of the border that joint the gutter and the script text area.
void	setBorderWidth(int borderWidth) The width of the border that joint the gutter and the script text area.
void	setFont(Font font) The font of the line number.
void	setForeground(Color foreground) The color of the line number.
void	setHighlightedColor(Color highlightedColor) The background of the highlighted row.
void	setHighlightedLineList(List<Integer> highlightedLineList) Set highlighted lines.
void	setLineNumberOffset(int offset) Set the line number offset.
void	setListenToDocumentUpdate(boolean listenToDocumentUpdate) Set to listen to document change events or not.
void	setPaddingLeft(int paddingLeft) The minimum padding from 'the leftmost of the line number text' to the 'left margin'.
void	setPaddingRight(int paddingRight) The minimum padding from the 'rightmost of the line number text' to the 'right margin' (not to the gutter border).
void	setTextAntiAliasing(Object textAntiAliasing) The anti-aliasing setting of the line number text.
protected void	updatePanelSize() Update the panel size.
protected void	validateTextComponentDocument() Check if the 'document of the textComponent' has changed to another document or not.

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, 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, 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, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, 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, getPeer, 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, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, 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

textAntiAliasing

protected Object textAntiAliasing

The anti-aliasing setting of the line number text. See RenderingHints.

borderColor

protected Color borderColor

The color of the border that joint the gutter and the script text area.

highlightedColor

protected Color highlightedColor

The background of the row when it is highlighted.

paddingLeft

protected int paddingLeft

The minimum padding from 'the leftmost of the line number text' to 'the left margin'.

paddingRight

protected int paddingRight

The minimum padding from 'the rightmost of the line number text' to 'the right margin' (not to the gutter border).

borderWidth

protected int borderWidth

The width of the border that joint the gutter and the script text area.

scrollPane

protected JScrollPane scrollPane

The JScrollPane that it be added into.

textComponent

protected JTextComponent textComponent

The text component to listen the change events on.

document

protected Document document

The document of the text component.

documentListener

protected DocumentListener documentListener

The document listener for document.

panelWidth

protected int panelWidth

The cached panel width.

largestRowNumber

protected int largestRowNumber

The cached largest row number (for determine panel width panelWidth).

textComponentHeight

protected int textComponentHeight

The cached text component height, for determine panel height.

lineNumberOffset

protected int lineNumberOffset

The line number offset. E.g. set offset to 9 will make the first line number to appear at line 1 + 9 = 10

highlightedLineList

protected final List<Integer> highlightedLineList

The list of line numbers that indicate which lines are needed to be highlighted.

listenToDocumentUpdate

protected boolean listenToDocumentUpdate

Indicator indicate whether it is listening to the document change events or not.

Constructor Detail

JTextComponentRowHeader

public JTextComponentRowHeader(JScrollPane scrollPane,
                               JTextComponent textComponent)

Constructor.

Parameters:

scrollPane - the JScrollPane that it be added into

textComponent - the text component to listen the change events on

Method Detail

validateTextComponentDocument

protected void validateTextComponentDocument()

Check if the 'document of the textComponent' has changed to another document or not.

checkPanelSize

public void checkPanelSize()

Check whether the height of the row header panel match with the height of the text component or not. If not, it will invoke updatePanelSize().

updatePanelSize

protected void updatePanelSize()

Update the panel size.

setFont

public void setFont(Font font)

The font of the line number.

Overrides:

setFont in class JComponent

setForeground

public void setForeground(Color foreground)

The color of the line number.

Overrides:

setForeground in class JComponent

Parameters:

foreground - the color

setBackground

public void setBackground(Color background)

The background of the panel.

Overrides:

setBackground in class JComponent

Parameters:

background - the color

getPreferredSize

public Dimension getPreferredSize()

Overrides:

getPreferredSize in class JComponent

paint

public void paint(Graphics g)

Overrides:

paint in class JComponent

getTextAntiAliasing

public Object getTextAntiAliasing()

The anti-aliasing setting of the line number text. See RenderingHints.

Returns:

the setting

setTextAntiAliasing

public void setTextAntiAliasing(Object textAntiAliasing)

The anti-aliasing setting of the line number text. See RenderingHints.

Parameters:

textAntiAliasing - the setting

getBorderColor

public Color getBorderColor()

The color of the border that joint the gutter and the script text area.

Returns:

the color

setBorderColor

public void setBorderColor(Color borderColor)

The color of the border that joint the gutter and the script text area.

Parameters:

borderColor - the color

getHighlightedColor

public Color getHighlightedColor()

The background of the highlighted row.

Returns:

the color

setHighlightedColor

public void setHighlightedColor(Color highlightedColor)

The background of the highlighted row.

Parameters:

highlightedColor - the color

getPaddingLeft

public int getPaddingLeft()

The minimum padding from the 'leftmost of the line number text' to the 'left margin'.

Returns:

the padding in pixel

setPaddingLeft

public void setPaddingLeft(int paddingLeft)

The minimum padding from 'the leftmost of the line number text' to the 'left margin'.

Parameters:

paddingLeft - the padding in pixel

getPaddingRight

public int getPaddingRight()

The minimum padding from the 'rightmost of the line number text' to the 'right margin' (not to the gutter border).

Returns:

the padding in pixel

setPaddingRight

public void setPaddingRight(int paddingRight)

The minimum padding from the 'rightmost of the line number text' to the 'right margin' (not to the gutter border).

Parameters:

paddingRight - the padding in pixel

getBorderWidth

public int getBorderWidth()

The width of the border that joint the gutter and the script text area.

Returns:

the width in pixel

setBorderWidth

public void setBorderWidth(int borderWidth)

The width of the border that joint the gutter and the script text area.

Parameters:

borderWidth - the width in pixel

getLineNumberOffset

public int getLineNumberOffset()

Get the line number offset

Returns:

the offset

setLineNumberOffset

public void setLineNumberOffset(int offset)

Set the line number offset. E.g. set offset to 9 will make the first line number to appear at line 1 + 9 = 10

Parameters:

offset - the offset

getHighlightedLineList

public List<Integer> getHighlightedLineList()

Get the list of highlighted lines.

Returns:

a copy of the list

setHighlightedLineList

public void setHighlightedLineList(List<Integer> highlightedLineList)

Set highlighted lines. Note that this will clear all previous recorded highlighted lines.

Parameters:

highlightedLineList - the list that contain the highlighted lines

addHighlightedLine

public boolean addHighlightedLine(int lineNumber)

Add highlighted line.

Parameters:

lineNumber - the line number to highlight

Returns:

see the return value of List.add(Object)

clearHighlightedLine

public void clearHighlightedLine()

Clear highlighted lines.

isListenToDocumentUpdate

public boolean isListenToDocumentUpdate()

Check if it is listening to the document change events.

Returns:

true if it is listening, false if not

setListenToDocumentUpdate

public void setListenToDocumentUpdate(boolean listenToDocumentUpdate)

Set to listen to document change events or not. It is useful when a number of updates are needed to be done to the text component. May invoke () after setting this to true.

Parameters:

listenToDocumentUpdate - true to listen on document change, false not