DefaultTreeCellEditor (Java 2 Platform SE v1.4.1_"07")

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JavaTM 2 Platform
Std. Ed. v1.4.1_"07"

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## javax.swing.tree
Class DefaultTreeCellEditor

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

All Implemented Interfaces:
  ActionListener, CellEditor, EventListener, TreeCellEditor, TreeSelectionListener

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 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 JavaBeansTM 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 `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.

### 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 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()

  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 is the cell is to be renderer 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 CellEditorListener

### getCellEditorListeners

    public CellEditorListener[] getCellEditorListeners()

  Returns an array of all the `CellEditorListener`s added to this DefaultTreeCellEditor with addCellEditorListener().

  Returns:
    all of the `CellEditorListener`s 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

Overview | Package | Class | Use | Tree | Deprecated | Index | Help

JavaTM 2 Platform
Std. Ed. v1.4.1_"07"

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