visad.util

Class TextEditor

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JScrollPane

visad.util.TextEditor

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, EventListener, Accessible, UndoableEditListener, ScrollPaneConstants

Direct Known Subclasses:

CodeEditor

public class TextEditor
extends JScrollPane
implements UndoableEditListener

A general-purpose editor for reading and writing text files.

See Also:

Serialized Form

Nested Class Summary

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

JScrollPane.AccessibleJScrollPane, JScrollPane.ScrollBar

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 boolean	changed whether the text has changed since last save
protected File	currentFile file being edited
static boolean	DEBUG debugging flag
static Font	MONO monospaced font
protected JTextArea	text main text area
protected UndoManager	undo undo manager

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
TextEditor() constructs a TextEditor
TextEditor(String filename) constructs a TextEditor containing text from the given filename

Method Summary

Modifier and Type	Method and Description
void	addUndoableEditListener(UndoableEditListener l) add an undoable edit listener
boolean	canRedo() returns whether a redo command is possible
boolean	canUndo() returns whether an undo command is possible
void	copy() copies the selected text to the clipboard
void	cut() cuts the selected text to the clipboard
protected JFileChooser	doMakeFileChooser() Create and initialize the the file chooser
File	getFile() returns the file being edited
protected JFileChooser	getFileChooser() Create if needed and return the file chooser
String	getFilename() returns the filename being edited
String	getRedoName() returns the name of the redo command
String	getText() returns a string containing the text of the document
JTextComponent	getTextComponent() Provide direct access to the text component
String	getUndoName() returns the name of the undo command
boolean	hasChanged() returns whether the document has changed since the last save
void	insertText(String textToInsert) Insert the given text at the caret
void	newFile() starts from scratch with a blank document
boolean	openDialog() pops up a dialog box for the user to select a file to open
void	openFile(File file) opens the given file
void	openFile(String filename) opens the given file
void	paste() pastes the clipboard into the text document
void	redo() redoes the last undone edit
void	removeUndoableEditListener(UndoableEditListener l) remove an undoable edit listener
boolean	saveDialog() pops up a dialog box for the user to select a file to save
boolean	saveFile() saves the file under its current name
void	saveFile(File file) saves the given file
void	saveFile(String filename) saves the given file
void	setText(String text) sets the text of this document to the current string
void	undo() undoes the last edit
void	undoableEditHappened(UndoableEditEvent e) handle undoable edits

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

MONO

public static final Font MONO

monospaced font

DEBUG

public static final boolean DEBUG

debugging flag

See Also:

Constant Field Values

text

protected JTextArea text

main text area

undo

protected UndoManager undo

undo manager

currentFile

protected File currentFile

file being edited

changed

protected boolean changed

whether the text has changed since last save

Constructor Detail

TextEditor

public TextEditor()

constructs a TextEditor

TextEditor

public TextEditor(String filename)

constructs a TextEditor containing text from the given filename

Method Detail

doMakeFileChooser

protected JFileChooser doMakeFileChooser()

Create and initialize the the file chooser

getFileChooser

protected JFileChooser getFileChooser()

Create if needed and return the file chooser

newFile

public void newFile()

starts from scratch with a blank document

openFile

public void openFile(String filename)
              throws IOException

opens the given file

Throws:

IOException

openFile

public void openFile(File file)
              throws IOException

opens the given file

Throws:

IOException

saveFile

public void saveFile(String filename)
              throws IOException

saves the given file

Throws:

IOException

saveFile

public void saveFile(File file)
              throws IOException

saves the given file

Throws:

IOException

openDialog

public boolean openDialog()

pops up a dialog box for the user to select a file to open

saveDialog

public boolean saveDialog()

pops up a dialog box for the user to select a file to save

saveFile

public boolean saveFile()

saves the file under its current name

undo

public void undo()
          throws CannotUndoException

undoes the last edit

Throws:

CannotUndoException

redo

public void redo()
          throws CannotRedoException

redoes the last undone edit

Throws:

CannotRedoException

cut

public void cut()

cuts the selected text to the clipboard

copy

public void copy()

copies the selected text to the clipboard

paste

public void paste()

pastes the clipboard into the text document

getTextComponent

public JTextComponent getTextComponent()

Provide direct access to the text component

Returns:

the text component

getText

public String getText()

returns a string containing the text of the document

setText

public void setText(String text)

sets the text of this document to the current string

insertText

public void insertText(String textToInsert)

Insert the given text at the caret

Parameters:

textToInsert - the text

getFilename

public String getFilename()

returns the filename being edited

getFile

public File getFile()

returns the file being edited

canUndo

public boolean canUndo()

returns whether an undo command is possible

canRedo

public boolean canRedo()

returns whether a redo command is possible

getUndoName

public String getUndoName()

returns the name of the undo command

getRedoName

public String getRedoName()

returns the name of the redo command

hasChanged

public boolean hasChanged()

returns whether the document has changed since the last save

undoableEditHappened

public void undoableEditHappened(UndoableEditEvent e)

handle undoable edits

Specified by:

undoableEditHappened in interface UndoableEditListener

addUndoableEditListener

public void addUndoableEditListener(UndoableEditListener l)

add an undoable edit listener

removeUndoableEditListener

public void removeUndoableEditListener(UndoableEditListener l)

remove an undoable edit listener