DefaultTreeCellEditor (Java Platform SE 8 )

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

All Implemented Interfaces:

ActionListener, EventListener, CellEditor, TreeSelectionListener, TreeCellEditor
```
public class DefaultTreeCellEditor
extends Object
implements ActionListener, TreeCellEditor, TreeSelectionListener
```
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 milliseconds.
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™ has been added to the java.beans package. Please see XMLEncoder.

See Also:

JTree

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`class`	`DefaultTreeCellEditor.DefaultTextField` `TextField` used when no editor is supplied.
`class`	`DefaultTreeCellEditor.EditorContainer` Container responsible for placing the `editingComponent`.

Field Summary

Fields
Modifier and Type	Field and Description
`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

Constructors
Constructor and Description
`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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`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 `CellEditorListener`s 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
```
    Editor handling the editing.
  - renderer
```
protected DefaultTreeCellRenderer renderer
```
    Renderer, used to get border and offsets from.
  - editingContainer
```
protected Container editingContainer
```
    Editing container, will contain the editorComponent.
  - editingComponent
```
protected transient Component editingComponent
```
    Component used in editing, obtained from the editingContainer.
  - canEdit
```
protected boolean canEdit
```
    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
```
    Used in editing. Indicates x position to place editingComponent.
  - tree
```
protected transient JTree tree
```
    JTree instance listening too.
  - lastPath
```
protected transient TreePath lastPath
```
    Last path that was selected.
  - timer
```
protected transient Timer timer
```
    Used before starting the editing session.
  - lastRow
```
protected transient int lastRow
```
    Row that was last passed into getTreeCellEditorComponent.
  - borderSelectionColor
```
protected Color borderSelectionColor
```
    True if the border selection color should be drawn.
  - editingIcon
```
protected transient Icon editingIcon
```
    Icon to use when editing.
  - font
```
protected Font font
```
    Font to paint with, null indicates font of renderer is to be used.
- Constructor Detail
  - DefaultTreeCellEditor
```
public DefaultTreeCellEditor(JTree tree,
                             DefaultTreeCellRenderer renderer)
```
    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)
```
    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)
```
    Sets the color to use for the border.
    
    Parameters:
    
    newColor - the new border color
  - getBorderSelectionColor
```
public Color getBorderSelectionColor()
```
    Returns the color the border is drawn.
    
    Returns:
    
    the border selection color
  - setFont
```
public void setFont(Font font)
```
    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 instantiated 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()
```
    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)
```
    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()
```
    Returns the value currently being edited.
    
    Specified by:
    
    getCellEditorValue in interface CellEditor
    
    Returns:
    
    the value currently being edited
  - isCellEditable
```
public boolean isCellEditable(EventObject event)
```
    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)
```
    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()
```
    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()
```
    Messages cancelCellEditing to the realEditor and removes it from this instance.
    
    Specified by:
    
    cancelCellEditing in interface CellEditor
  - addCellEditorListener
```
public void addCellEditorListener(CellEditorListener l)
```
    Adds the CellEditorListener.
    
    Specified by:
    
    addCellEditorListener in interface CellEditor
    
    Parameters:
    
    l - the listener to be added
  - removeCellEditorListener
```
public void removeCellEditorListener(CellEditorListener l)
```
    Removes the previously added CellEditorListener.
    
    Specified by:
    
    removeCellEditorListener in interface CellEditor
    
    Parameters:
    
    l - the listener to be removed
  - getCellEditorListeners
```
public CellEditorListener[] getCellEditorListeners()
```
    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)
```
    Resets lastPath.
    
    Specified by:
    
    valueChanged in interface TreeSelectionListener
    
    Parameters:
    
    e - the event that characterizes the change.
  - actionPerformed
```
public void actionPerformed(ActionEvent e)
```
    Messaged when the timer fires, this will start the editing session.
    
    Specified by:
    
    actionPerformed in interface ActionListener
  - setTree
```
protected void setTree(JTree newTree)
```
    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)
```
    Returns true if event is a MouseEvent and the click count is 1.
    
    Parameters:
    
    event - the event being studied
  - startEditingTimer
```
protected void startEditingTimer()
```
    Starts the editing timer.
  - canEditImmediately
```
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.
    
    Parameters:
    
    event - the event being studied
  - inHitRegion
```
protected boolean inHitRegion(int x,
                              int y)
```
    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)
```
  - prepareForEditing
```
protected void prepareForEditing()
```
    Invoked just before editing is to start. Will add the editingComponent to the editingContainer.
  - createContainer
```
protected Container createContainer()
```
    Creates the container to manage placement of editingComponent.
  - createTreeCellEditor
```
protected TreeCellEditor createTreeCellEditor()
```
    This is invoked if a TreeCellEditor is not supplied in the constructor. It returns a TextField editor.
    
    Returns:
    
    a new TextField editor

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Class DefaultTreeCellEditor

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

realEditor

renderer

editingContainer

editingComponent

canEdit

offset

tree

lastPath

timer

lastRow

borderSelectionColor

editingIcon

font

Constructor Detail

DefaultTreeCellEditor

DefaultTreeCellEditor

Method Detail

setBorderSelectionColor

getBorderSelectionColor

setFont

getFont

getTreeCellEditorComponent

getCellEditorValue

isCellEditable

shouldSelectCell

stopCellEditing

cancelCellEditing

addCellEditorListener

removeCellEditorListener

getCellEditorListeners

valueChanged

actionPerformed

setTree

shouldStartEditingTimer

startEditingTimer

canEditImmediately

inHitRegion

determineOffset

prepareForEditing

createContainer

createTreeCellEditor