org.gvsig.tools.swing.impl.hexeditor.swing

Class HexEditorComponent

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JScrollPane

org.gvsig.tools.swing.impl.hexeditor.swing.HexEditorComponent

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, javax.accessibility.Accessible, javax.swing.ScrollPaneConstants

public class HexEditorComponent
extends javax.swing.JScrollPane

A Swing hex editor component.

The hex editor's functionality includes:

• Cut, copy, paste, delete of 1 or more bytes
• Undo/redo
• Selecting a contiguous block of bytes

See Also:

Serialized Form

Nested Class Summary

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

javax.swing.JScrollPane.AccessibleJScrollPane, javax.swing.JScrollPane.ScrollBar

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

javax.swing.JComponent.AccessibleJComponent

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

java.awt.Container.AccessibleAWTContainer

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

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	PROPERTY_ALTERNATE_COLUMN_BG Property fired when the alternating of column background colors is toggled.
static java.lang.String	PROPERTY_ALTERNATE_ROW_BG Property fired when the alternating of row background colors is toggled.
static java.lang.String	PROPERTY_ASCII_DUMP_HIGHLIGHT_COLOR Property fired when the highlight color of the ascii dump column is changed.
static java.lang.String	PROPERTY_HIGHLIGHT_ASCII_DUMP Property fired when the visibility of the highlight in the "ascii dump" column is toggled.
static java.lang.String	PROPERTY_PAD_LOW_BYTES Property fired when the padding of low bytes (0 - 15) is toggled.
static java.lang.String	PROPERTY_SHOW_GRID Property fired when the visibility of the grid is toggled.

Fields inherited from class javax.swing.JScrollPane

columnHeader, horizontalScrollBar, horizontalScrollBarPolicy, lowerLeft, lowerRight, rowHeader, upperLeft, upperRight, verticalScrollBar, verticalScrollBarPolicy, viewport

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 javax.swing.ScrollPaneConstants

COLUMN_HEADER, HORIZONTAL_SCROLLBAR, HORIZONTAL_SCROLLBAR_ALWAYS, HORIZONTAL_SCROLLBAR_AS_NEEDED, HORIZONTAL_SCROLLBAR_NEVER, HORIZONTAL_SCROLLBAR_POLICY, LOWER_LEADING_CORNER, LOWER_LEFT_CORNER, LOWER_RIGHT_CORNER, LOWER_TRAILING_CORNER, ROW_HEADER, UPPER_LEADING_CORNER, UPPER_LEFT_CORNER, UPPER_RIGHT_CORNER, UPPER_TRAILING_CORNER, VERTICAL_SCROLLBAR, VERTICAL_SCROLLBAR_ALWAYS, VERTICAL_SCROLLBAR_AS_NEEDED, VERTICAL_SCROLLBAR_NEVER, VERTICAL_SCROLLBAR_POLICY, VIEWPORT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors

Constructor and Description
HexEditorComponent() Creates a new HexEditor component.

Method Summary

Modifier and Type	Method and Description
void	addHexEditorListener(HexEditorListener l) Adds a hex editor listener to this editor.
void	addSelectionChangedListener(SelectionChangedListener l) Registers a prospect who is interested when the text selection from the hex editor becomes changed.
int	cellToOffset(int row, int col) Returns the offset into the bytes being edited represented at the specified cell in the table, if any.
void	copy() Copies the currently selected bytes to the clipboard.
void	cut() Removes the currently selected bytes and moves them to the clipboard.
void	delete() Removes the currently selected bytes.
protected void	fireHexEditorEvent(int offset, int added, int removed) Notifies all interested listeners of an event in this hex editor.
boolean	getAlternateColumnBG() Returns whether the color of columns in the hex editor should alternate.
boolean	getAlternateRowBG() Returns whether the color of rows in the hex editor should alternate.
byte	getByte(int offset) Returns the byte at the specified offset.
int	getByteCount() Returns the number of bytes being edited.
byte[]	getBytes()
boolean	getHighlightSelectionInAsciiDump() Returns whether the selected bytes should also appear selected in the "ascii dump" column.
java.awt.Color	getHighlightSelectionInAsciiDumpColor() Returns the color used to highlight the selected bytes in the "ascii dump" column.
int	getLargestSelectionIndex() Returns the largest selection index.
boolean	getPadLowBytes() Returns whether bytes that can be displayed as a single char (i.e.
int	getSmallestSelectionIndex() Returns the smallest selection index.
java.awt.Point	offsetToCell(int offset) Returns the cell representing the specified offset into the hex document.
void	open(java.io.InputStream in) Sets the contents in the hex editor to the contents of the specified input stream.
void	open(java.lang.String fileName) Sets the contents in the hex editor to the contents of the specified file.
void	paste() "Pastes" the bytes in the clipboard into the current selection in the hex editor.
boolean	redo() Tries to redo the last action undone.
void	removeBytes(int offs, int len) Removes a range of bytes.
void	removeHexEditorListener(HexEditorListener l) Removes the specified hex editor listener from this editor.
void	removeSelectionChangedListener(SelectionChangedListener l) Removes a listener who isn't any longer interested whether the text selection from the hex editor becomes changed.
void	replaceBytes(int offset, int len, byte[] bytes) Replaces a range of bytes.
void	replaceSelection(byte[] bytes) Replaces the currently selected bytes (if greater or equal to 1) with the specified new bytes.
void	setAlternateColumnBG(boolean alternate) Sets whether the column color should alternate in the hex editor.
void	setAlternateRowBG(boolean alternate) Sets whether the row color should alternate in the hex editor.
void	setCellEditable(boolean cellEditable) Toggles whether the cells in the hex editor are editable by clicking in them.
void	setHighlightSelectionInAsciiDump(boolean highlight) Sets whether the selected bytes should also appear selected in the "ascii dump" column.
void	setHighlightSelectionInAsciiDumpColor(java.awt.Color c) Sets what color should be used for the "ascii dump" selection.
void	setPadLowBytes(boolean pad) Sets whether bytes that can be displayed as a single char (i.e.
void	setSelectedRange(int startOffs, int endOffs) Sets the range of bytes to select in the hex editor.
void	setShowColumnHeader(boolean show) Toggles whether table's column header is visible.
void	setShowGrid(boolean show) Toggles whether the table's grid lines are visible.
void	setShowRowHeader(boolean show) Toggles whether table's row header is visible.
boolean	undo() Tries to undo the last action.

Methods inherited from class javax.swing.JScrollPane

createHorizontalScrollBar, createVerticalScrollBar, createViewport, getAccessibleContext, getColumnHeader, getCorner, getHorizontalScrollBar, getHorizontalScrollBarPolicy, getRowHeader, getUI, getUIClassID, getVerticalScrollBar, getVerticalScrollBarPolicy, getViewport, getViewportBorder, getViewportBorderBounds, isValidateRoot, isWheelScrollingEnabled, paramString, setColumnHeader, setColumnHeaderView, setComponentOrientation, setCorner, setHorizontalScrollBar, setHorizontalScrollBarPolicy, setLayout, setRowHeader, setRowHeaderView, setUI, setVerticalScrollBar, setVerticalScrollBarPolicy, setViewport, setViewportBorder, setViewportView, setWheelScrollingEnabled, 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, 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, setBorder, 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, 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, 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

PROPERTY_ALTERNATE_COLUMN_BG

public static final java.lang.String PROPERTY_ALTERNATE_COLUMN_BG

Property fired when the alternating of column background colors is toggled.

See Also:

Constant Field Values

PROPERTY_ALTERNATE_ROW_BG

public static final java.lang.String PROPERTY_ALTERNATE_ROW_BG

Property fired when the alternating of row background colors is toggled.

See Also:

Constant Field Values

PROPERTY_ASCII_DUMP_HIGHLIGHT_COLOR

public static final java.lang.String PROPERTY_ASCII_DUMP_HIGHLIGHT_COLOR

Property fired when the highlight color of the ascii dump column is changed.

See Also:

Constant Field Values

PROPERTY_HIGHLIGHT_ASCII_DUMP

public static final java.lang.String PROPERTY_HIGHLIGHT_ASCII_DUMP

Property fired when the visibility of the highlight in the "ascii dump" column is toggled.

See Also:

Constant Field Values

PROPERTY_PAD_LOW_BYTES

public static final java.lang.String PROPERTY_PAD_LOW_BYTES

Property fired when the padding of low bytes (0 - 15) is toggled.

See Also:

Constant Field Values

PROPERTY_SHOW_GRID

public static final java.lang.String PROPERTY_SHOW_GRID

Property fired when the visibility of the grid is toggled.

See Also:

Constant Field Values

Constructor Detail

HexEditorComponent

public HexEditorComponent()

Creates a new HexEditor component.

Method Detail

addHexEditorListener

public void addHexEditorListener(HexEditorListener l)

Adds a hex editor listener to this editor.

Parameters:

l - The listener to add.

See Also:

removeHexEditorListener(HexEditorListener)

addSelectionChangedListener

public void addSelectionChangedListener(SelectionChangedListener l)

Registers a prospect who is interested when the text selection from the hex editor becomes changed.

Parameters:

l - The concerning listener.

See Also:

removeSelectionChangedListener(SelectionChangedListener)

cellToOffset

public int cellToOffset(int row,
                        int col)

Returns the offset into the bytes being edited represented at the specified cell in the table, if any.

Parameters:

row - The row in the table.

col - The column in the table.

Returns:

The offset into the byte array, or -1 if the cell does not represent part of the byte array (such as the tailing "ascii dump" column's cells).

See Also:

offsetToCell(int)

copy

public void copy()

Copies the currently selected bytes to the clipboard.

See Also:

cut(), paste(), delete()

cut

public void cut()

Removes the currently selected bytes and moves them to the clipboard.

See Also:

copy(), paste(), delete()

delete

public void delete()

Removes the currently selected bytes.

See Also:

cut(), copy(), paste()

fireHexEditorEvent

protected void fireHexEditorEvent(int offset,
                                  int added,
                                  int removed)

Notifies all interested listeners of an event in this hex editor.

Parameters:

offset - The offset of the change.

added - The number of bytes added.

removed - The number of bytes removed.

getAlternateColumnBG

public boolean getAlternateColumnBG()

Returns whether the color of columns in the hex editor should alternate.

Returns:

Whether the column color alternates.

See Also:

setAlternateColumnBG(boolean), getAlternateRowBG()

getAlternateRowBG

public boolean getAlternateRowBG()

Returns whether the color of rows in the hex editor should alternate.

Returns:

Whether the row color alternates.

See Also:

setAlternateRowBG(boolean), getAlternateColumnBG()

getByte

public byte getByte(int offset)

Returns the byte at the specified offset.

Parameters:

offset - The offset.

Returns:

The byte.

getByteCount

public int getByteCount()

Returns the number of bytes being edited.

Returns:

The number of bytes.

getBytes

public byte[] getBytes()

getHighlightSelectionInAsciiDump

public boolean getHighlightSelectionInAsciiDump()

Returns whether the selected bytes should also appear selected in the "ascii dump" column.

Returns:

Whether the selected bytes should also be selected in the "ascii dump" column.

See Also:

setHighlightSelectionInAsciiDump(boolean)

getHighlightSelectionInAsciiDumpColor

public java.awt.Color getHighlightSelectionInAsciiDumpColor()

Returns the color used to highlight the selected bytes in the "ascii dump" column.

Returns:

The color used.

See Also:

setHighlightSelectionInAsciiDumpColor(Color), getHighlightSelectionInAsciiDump()

getLargestSelectionIndex

public int getLargestSelectionIndex()

Returns the largest selection index.

Returns:

The largest selection index.

See Also:

getSmallestSelectionIndex()

getPadLowBytes

public boolean getPadLowBytes()

Returns whether bytes that can be displayed as a single char (i.e. 0 - 15) are prepended with a "0" char to make them two characters wide in the display.

Returns:

Whether bytes with one-character hex representations will be prepended with a "0" in the display.

See Also:

setPadLowBytes(boolean)

getSmallestSelectionIndex

public int getSmallestSelectionIndex()

Returns the smallest selection index.

Returns:

The smallest selection index.

See Also:

getLargestSelectionIndex()

offsetToCell

public java.awt.Point offsetToCell(int offset)

Returns the cell representing the specified offset into the hex document.

Parameters:

offset - The offset into the document.

Returns:

The cell, in the form (row, col). If the specified offset is invalid, (-1, -1) is returned.

See Also:

cellToOffset(int, int)

open

public void open(java.lang.String fileName)
          throws java.io.IOException

Sets the contents in the hex editor to the contents of the specified file.

Parameters:

fileName - The name of the file to open.

Throws:

java.io.IOException - If an IO error occurs.

open

public void open(java.io.InputStream in)
          throws java.io.IOException

Sets the contents in the hex editor to the contents of the specified input stream.

Parameters:

in - An input stream.

Throws:

java.io.IOException - If an IO error occurs.

paste

public void paste()

"Pastes" the bytes in the clipboard into the current selection in the hex editor.

See Also:

copy(), cut(), delete()

redo

public boolean redo()

Tries to redo the last action undone.

Returns:

Whether there is another action to redo after this one.

See Also:

undo()

removeBytes

public void removeBytes(int offs,
                        int len)

Removes a range of bytes.

Parameters:

offs - The offset of the range of bytes to remove.

len - The number of bytes to remove.

See Also:

replaceBytes(int, int, byte[])

removeHexEditorListener

public void removeHexEditorListener(HexEditorListener l)

Removes the specified hex editor listener from this editor.

Parameters:

l - The listener to remove.

See Also:

addHexEditorListener(HexEditorListener)

removeSelectionChangedListener

public void removeSelectionChangedListener(SelectionChangedListener l)

Removes a listener who isn't any longer interested whether the text selection from the hex editor becomes changed.

Parameters:

l - The concerning previous prospect.

See Also:

addSelectionChangedListener(SelectionChangedListener)

replaceBytes

public void replaceBytes(int offset,
                         int len,
                         byte[] bytes)

Replaces a range of bytes.

Parameters:

offset - The offset of the range of bytes to replace.

len - The number of bytes to replace.

bytes - The bytes to replace the range with.

See Also:

removeBytes(int, int), replaceSelection(byte[])

replaceSelection

public void replaceSelection(byte[] bytes)

Replaces the currently selected bytes (if greater or equal to 1) with the specified new bytes.

Parameters:

bytes - The new bytes. If this is null or an empty array, calling this method simply removes the currently selected bytes.

See Also:

replaceBytes(int, int, byte[])

setAlternateColumnBG

public void setAlternateColumnBG(boolean alternate)

Sets whether the column color should alternate in the hex editor. This method fires a property change event of type PROPERTY_ALTERNATE_COLUMN_BG.

Parameters:

alternate - Whether the column color should alternate.

See Also:

getAlternateColumnBG(), setAlternateRowBG(boolean)

setAlternateRowBG

public void setAlternateRowBG(boolean alternate)

Sets whether the row color should alternate in the hex editor. This method fires a property change event of type PROPERTY_ALTERNATE_ROW_BG.

Parameters:

alternate - Whether the row color should alternate.

See Also:

getAlternateRowBG(), setAlternateColumnBG(boolean)

setCellEditable

public void setCellEditable(boolean cellEditable)

Toggles whether the cells in the hex editor are editable by clicking in them.

Parameters:

cellEditable - Whether individual editor cells should be editable.

setHighlightSelectionInAsciiDump

public void setHighlightSelectionInAsciiDump(boolean highlight)

Sets whether the selected bytes should also appear selected in the "ascii dump" column. This method fires a property change event of type PROPERTY_HIGHLIGHT_ASCII_DUMP.

Parameters:

highlight - Whether the selected bytes should also appear selected in the "ascii dump" column.

See Also:

getHighlightSelectionInAsciiDump(), setHighlightSelectionInAsciiDumpColor(Color)

setHighlightSelectionInAsciiDumpColor

public void setHighlightSelectionInAsciiDumpColor(java.awt.Color c)

Sets what color should be used for the "ascii dump" selection. This method fires a property change event of type PROPERTY_ASCII_DUMP_HIGHLIGHT_COLOR.

Parameters:

c - The color to use.

See Also:

getHighlightSelectionInAsciiDumpColor(), setHighlightSelectionInAsciiDump(boolean)

setPadLowBytes

public void setPadLowBytes(boolean pad)

Sets whether bytes that can be displayed as a single char (i.e. 0 - 15) are prepended with a "0" char to make them two characters wide in the display. This method fires a property change event of type PROPERTY_PAD_LOW_BYTES.

Parameters:

pad - Whether to pad such bytes in the display.

See Also:

getPadLowBytes()

setSelectedRange

public void setSelectedRange(int startOffs,
                             int endOffs)

Sets the range of bytes to select in the hex editor.

Parameters:

startOffs - The first byte to select.

endOffs - The last byte to select.

setShowColumnHeader

public void setShowColumnHeader(boolean show)

Toggles whether table's column header is visible.

Parameters:

show - Whether to show the table column header.

See Also:

setShowRowHeader(boolean)

setShowGrid

public void setShowGrid(boolean show)

Toggles whether the table's grid lines are visible. This method fires a property change event of type PROPERTY_SHOW_GRID.

Parameters:

show - Whether grid lines are visible.

setShowRowHeader

public void setShowRowHeader(boolean show)

Toggles whether table's row header is visible.

Parameters:

show - Whether to show the table row header.

See Also:

setShowColumnHeader(boolean)

undo

public boolean undo()

Tries to undo the last action.

Returns:

Whether there is another action to undo after this one.

See Also:

redo()