javax.swing.tree
Class DefaultTreeCellEditor

java.lang.Object
  javax.swing.tree.DefaultTreeCellEditor

All Implemented Interfaces:

ActionListener, EventListener, CellEditor, TreeSelectionListener, TreeCellEditor

public class DefaultTreeCellEditor
extends Object
implements ActionListener, TreeCellEditor, TreeSelectionListener

Disabled: no SafeJ information.

A TreeCellEditor. You need to supply an instance of DefaultTreeCellRenderer so that the icons can be obtained. You can optionally supply a TreeCellEditor that will be layed out according to the icon in the DefaultTreeCellRenderer. If you do not supply a TreeCellEditor, a TextField will be used. Editing is started on a triple mouse click, or after a click, pause, click and a delay of 1200 miliseconds.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans^TM has been added to the java.beans package. Please see XMLEncoder.

See Also:

JTree

Nested Class Summary

class	DefaultTreeCellEditor.DefaultTextField TextField used when no editor is supplied.
class	DefaultTreeCellEditor.EditorContainer Container responsible for placing the editingComponent.

Field Summary

protected Color	borderSelectionColor True if the border selection color should be drawn.
protected boolean	canEdit As of Java 2 platform v1.4 this field should no longer be used.
protected Component	editingComponent Component used in editing, obtained from the editingContainer.
protected Container	editingContainer Editing container, will contain the editorComponent.
protected Icon	editingIcon Icon to use when editing.
protected Font	font Font to paint with, null indicates font of renderer is to be used.
protected TreePath	lastPath Last path that was selected.
protected int	lastRow Row that was last passed into getTreeCellEditorComponent.
protected int	offset Used in editing.
protected TreeCellEditor	realEditor Editor handling the editing.
protected DefaultTreeCellRenderer	renderer Renderer, used to get border and offsets from.
protected Timer	timer Used before starting the editing session.
protected JTree	tree JTree instance listening too.

Constructor Summary

DefaultTreeCellEditor(JTree tree, DefaultTreeCellRenderer renderer)
Constructs a DefaultTreeCellEditor object for a JTree using the specified renderer and a default editor.

DefaultTreeCellEditor(JTree tree, DefaultTreeCellRenderer renderer, TreeCellEditor editor)
Constructs a DefaultTreeCellEditor object for a JTree using the specified renderer and the specified editor.

Method Summary

void	actionPerformed(ActionEvent e) Messaged when the timer fires, this will start the editing session.
void	addCellEditorListener(CellEditorListener l) Adds the CellEditorListener.
void	cancelCellEditing() Messages cancelCellEditing to the realEditor and removes it from this instance.
protected boolean	canEditImmediately(EventObject event) Returns true if event is null, or it is a MouseEvent with a click count > 2 and inHitRegion returns true.
protected Container	createContainer() Creates the container to manage placement of editingComponent.
protected TreeCellEditor	createTreeCellEditor() This is invoked if a TreeCellEditor is not supplied in the constructor.
protected void	determineOffset(JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row)
Color	getBorderSelectionColor() Returns the color the border is drawn.
CellEditorListener[]	getCellEditorListeners() Returns an array of all the CellEditorListeners added to this DefaultTreeCellEditor with addCellEditorListener().
Object	getCellEditorValue() Returns the value currently being edited.
Font	getFont() Gets the font used for editing.
Component	getTreeCellEditorComponent(JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row) Configures the editor.
protected boolean	inHitRegion(int x, int y) Returns true if the passed in location is a valid mouse location to start editing from.
boolean	isCellEditable(EventObject event) If the realEditor returns true to this message, prepareForEditing is messaged and true is returned.
protected void	prepareForEditing() Invoked just before editing is to start.
void	removeCellEditorListener(CellEditorListener l) Removes the previously added CellEditorListener.
void	setBorderSelectionColor(Color newColor) Sets the color to use for the border.
void	setFont(Font font) Sets the font to edit with.
protected void	setTree(JTree newTree) Sets the tree currently editing for.
boolean	shouldSelectCell(EventObject event) Messages the realEditor for the return value.
protected boolean	shouldStartEditingTimer(EventObject event) Returns true if event is a MouseEvent and the click count is 1.
protected void	startEditingTimer() Starts the editing timer.
boolean	stopCellEditing() If the realEditor will allow editing to stop, the realEditor is removed and true is returned, otherwise false is returned.
void	valueChanged(TreeSelectionEvent e) Resets lastPath.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

realEditor

protected TreeCellEditor realEditor

Class is disabled.

Editor handling the editing.

renderer

protected DefaultTreeCellRenderer renderer

Class is disabled.

Renderer, used to get border and offsets from.

editingContainer

protected Container editingContainer

Class is disabled.

Editing container, will contain the editorComponent.

editingComponent

protected transient Component editingComponent

Class is disabled.

Component used in editing, obtained from the editingContainer.

canEdit

protected boolean canEdit

Class is disabled.

As of Java 2 platform v1.4 this field should no longer be used. If you wish to provide similar behavior you should directly override isCellEditable.

offset

protected transient int offset

Class is disabled.

Used in editing. Indicates x position to place editingComponent.

tree

protected transient JTree tree

Class is disabled.

JTree instance listening too.

lastPath

protected transient TreePath lastPath

Class is disabled.

Last path that was selected.

timer

protected transient Timer timer

Class is disabled.

Used before starting the editing session.

lastRow

protected transient int lastRow

Class is disabled.

Row that was last passed into getTreeCellEditorComponent.

borderSelectionColor

protected Color borderSelectionColor

Class is disabled.

True if the border selection color should be drawn.

editingIcon

protected transient Icon editingIcon

Class is disabled.

Icon to use when editing.

font

protected Font font

Class is disabled.

Font to paint with, null indicates font of renderer is to be used.

Constructor Detail

DefaultTreeCellEditor

public DefaultTreeCellEditor(JTree tree,
                             DefaultTreeCellRenderer renderer)

Class is disabled.

Constructs a DefaultTreeCellEditor object for a JTree using the specified renderer and a default editor. (Use this constructor for normal editing.)

Parameters:

tree - a JTree object

renderer - a DefaultTreeCellRenderer object

DefaultTreeCellEditor

public DefaultTreeCellEditor(JTree tree,
                             DefaultTreeCellRenderer renderer,
                             TreeCellEditor editor)

Class is disabled.

Constructs a DefaultTreeCellEditor object for a JTree using the specified renderer and the specified editor. (Use this constructor for specialized editing.)

Parameters:

tree - a JTree object

renderer - a DefaultTreeCellRenderer object

editor - a TreeCellEditor object

Method Detail

setBorderSelectionColor

public void setBorderSelectionColor(Color newColor)

Class is disabled.

Sets the color to use for the border.

Parameters:

newColor - the new border color

getBorderSelectionColor

public Color getBorderSelectionColor()

Class is disabled.

Returns the color the border is drawn.

Returns:

the border selection color

setFont

public void setFont(Font font)

Class is disabled.

Sets the font to edit with. null indicates the renderers font should be used. This will NOT override any font you have set in the editor the receiver was instantied with. If null for an editor was passed in a default editor will be created that will pick up this font.

Parameters:

font - the editing Font

See Also:

getFont()

getFont

public Font getFont()

Class is disabled.

Gets the font used for editing.

Returns:

the editing Font

See Also:

setFont(java.awt.Font)

getTreeCellEditorComponent

public Component getTreeCellEditorComponent(JTree tree,
                                            Object value,
                                            boolean isSelected,
                                            boolean expanded,
                                            boolean leaf,
                                            int row)

Class is disabled.

Configures the editor. Passed onto the realEditor.

Specified by:

getTreeCellEditorComponent in interface TreeCellEditor

Parameters:

tree - the JTree that is asking the editor to edit; this parameter can be null

value - the value of the cell to be edited

isSelected - true if the cell is to be rendered with selection highlighting

expanded - true if the node is expanded

leaf - true if the node is a leaf node

row - the row index of the node being edited

Returns:

the component for editing

getCellEditorValue

public Object getCellEditorValue()

Class is disabled.

Returns the value currently being edited.

Specified by:

getCellEditorValue in interface CellEditor

Returns:

the value currently being edited

isCellEditable

public boolean isCellEditable(EventObject event)

Class is disabled.

If the realEditor returns true to this message, prepareForEditing is messaged and true is returned.

Specified by:

isCellEditable in interface CellEditor

Parameters:

event - the event the editor should use to consider whether to begin editing or not

Returns:

true if editing can be started

See Also:

CellEditor.shouldSelectCell(java.util.EventObject)

shouldSelectCell

public boolean shouldSelectCell(EventObject event)

Class is disabled.

Messages the realEditor for the return value.

Specified by:

shouldSelectCell in interface CellEditor

Parameters:

event - the event the editor should use to start editing

Returns:

true if the editor would like the editing cell to be selected; otherwise returns false

See Also:

CellEditor.isCellEditable(java.util.EventObject)

stopCellEditing

public boolean stopCellEditing()

Class is disabled.

If the realEditor will allow editing to stop, the realEditor is removed and true is returned, otherwise false is returned.

Specified by:

stopCellEditing in interface CellEditor

Returns:

true if editing was stopped; false otherwise

cancelCellEditing

public void cancelCellEditing()

Class is disabled.

Messages cancelCellEditing to the realEditor and removes it from this instance.

Specified by:

cancelCellEditing in interface CellEditor

addCellEditorListener

public void addCellEditorListener(CellEditorListener l)

Class is disabled.

Adds the CellEditorListener.

Specified by:

addCellEditorListener in interface CellEditor

Parameters:

l - the listener to be added

removeCellEditorListener

public void removeCellEditorListener(CellEditorListener l)

Class is disabled.

Removes the previously added CellEditorListener.

Specified by:

removeCellEditorListener in interface CellEditor

Parameters:

l - the listener to be removed

getCellEditorListeners

public CellEditorListener[] getCellEditorListeners()

Class is disabled.

Returns an array of all the CellEditorListeners added to this DefaultTreeCellEditor with addCellEditorListener().

Returns:

all of the CellEditorListeners added or an empty array if no listeners have been added

Since:

1.4

valueChanged

public void valueChanged(TreeSelectionEvent e)

Class is disabled.

Resets lastPath.

Specified by:

valueChanged in interface TreeSelectionListener

Parameters:

e - the event that characterizes the change.

actionPerformed

public void actionPerformed(ActionEvent e)

Class is disabled.

Messaged when the timer fires, this will start the editing session.

Specified by:

actionPerformed in interface ActionListener

setTree

protected void setTree(JTree newTree)

Class is disabled.

Sets the tree currently editing for. This is needed to add a selection listener.

Parameters:

newTree - the new tree to be edited

shouldStartEditingTimer

protected boolean shouldStartEditingTimer(EventObject event)

Class is disabled.

Returns true if event is a MouseEvent and the click count is 1.

Parameters:

event - the event being studied

startEditingTimer

protected void startEditingTimer()

Class is disabled.

Starts the editing timer.

canEditImmediately

protected boolean canEditImmediately(EventObject event)

Class is disabled.

Returns true if event is null, or it is a MouseEvent with a click count > 2 and inHitRegion returns true.

Parameters:

event - the event being studied

inHitRegion

protected boolean inHitRegion(int x,
                              int y)

Class is disabled.

Returns true if the passed in location is a valid mouse location to start editing from. This is implemented to return false if x is <= the width of the icon and icon gap displayed by the renderer. In other words this returns true if the user clicks over the text part displayed by the renderer, and false otherwise.

Parameters:

x - the x-coordinate of the point

y - the y-coordinate of the point

Returns:

true if the passed in location is a valid mouse location

determineOffset

protected void determineOffset(JTree tree,
                               Object value,
                               boolean isSelected,
                               boolean expanded,
                               boolean leaf,
                               int row)

Class is disabled.

prepareForEditing

protected void prepareForEditing()

Class is disabled.

Invoked just before editing is to start. Will add the editingComponent to the editingContainer.

createContainer

protected Container createContainer()

Class is disabled.

Creates the container to manage placement of editingComponent.

createTreeCellEditor

protected TreeCellEditor createTreeCellEditor()

Class is disabled.

This is invoked if a TreeCellEditor is not supplied in the constructor. It returns a TextField editor.

Returns:

a new TextField editor