Java javax.swing.tree Class DefaultTreeSelectionModel（JDK8）

Field Detail

• SELECTION_MODE_PROPERTY

  public static final String SELECTION_MODE_PROPERTY

  Property name for selectionMode.

  See Also:

  Constant Field Values

• changeSupport

  protected SwingPropertyChangeSupport changeSupport

  Used to messaged registered listeners.

• selection

  protected TreePath[] selection

  Paths that are currently selected. Will be null if nothing is currently selected.

• listenerList

  protected EventListenerList listenerList

  Event listener list.

• rowMapper

  protected transient RowMapper rowMapper

  Provides a row for a given path.

• listSelectionModel

  protected DefaultListSelectionModel listSelectionModel

  Handles maintaining the list selection model. The RowMapper is used to map from a TreePath to a row, and the value is then placed here.

• selectionMode

  protected int selectionMode

  Mode for the selection, will be either SINGLE_TREE_SELECTION, CONTIGUOUS_TREE_SELECTION or DISCONTIGUOUS_TREE_SELECTION.

• leadPath

  protected TreePath leadPath

  Last path that was added.

• leadIndex

  protected int leadIndex

  Index of the lead path in selection.

• leadRow

  protected int leadRow

  Lead row.

Constructor Detail

• DefaultTreeSelectionModel

  public DefaultTreeSelectionModel()

  Creates a new instance of DefaultTreeSelectionModel that is empty, with a selection mode of DISCONTIGUOUS_TREE_SELECTION.

Method Detail

• setRowMapper

  public void setRowMapper(RowMapper newMapper)

  Sets the RowMapper instance. This instance is used to determine the row for a particular TreePath.

  Specified by:

  setRowMapper in interface TreeSelectionModel

• getRowMapper

  public RowMapper getRowMapper()

  Returns the RowMapper instance that is able to map a TreePath to a row.

  Specified by:

  getRowMapper in interface TreeSelectionModel

• setSelectionMode

  public void setSelectionMode(int mode)

  Sets the selection model, which must be one of SINGLE_TREE_SELECTION, CONTIGUOUS_TREE_SELECTION or DISCONTIGUOUS_TREE_SELECTION. If mode is not one of the defined value, DISCONTIGUOUS_TREE_SELECTION is assumed.

  This may change the selection if the current selection is not valid for the new mode. For example, if three TreePaths are selected when the mode is changed to SINGLE_TREE_SELECTION, only one TreePath will remain selected. It is up to the particular implementation to decide what TreePath remains selected.

  Setting the mode to something other than the defined types will result in the mode becoming DISCONTIGUOUS_TREE_SELECTION.

  Specified by:

  setSelectionMode in interface TreeSelectionModel

• getSelectionMode

  public int getSelectionMode()

  Returns the selection mode, one of SINGLE_TREE_SELECTION, DISCONTIGUOUS_TREE_SELECTION or CONTIGUOUS_TREE_SELECTION.

  Specified by:

  getSelectionMode in interface TreeSelectionModel

• setSelectionPath

  public void setSelectionPath(TreePath path)

  Sets the selection to path. If this represents a change, then the TreeSelectionListeners are notified. If path is null, this has the same effect as invoking clearSelection.

  Specified by:

  setSelectionPath in interface TreeSelectionModel

  Parameters:

  path - new path to select

• setSelectionPaths

  public void setSelectionPaths(TreePath[] pPaths)

  Sets the selection. Whether the supplied paths are taken as the new selection depends upon the selection mode. If the supplied array is null, or empty, the selection is cleared. If the selection mode is SINGLE_TREE_SELECTION, only the first path in pPaths is used. If the selection mode is CONTIGUOUS_TREE_SELECTION and the supplied paths are not contiguous, then only the first path in pPaths is used. If the selection mode is DISCONTIGUOUS_TREE_SELECTION, then all paths are used.

  All null paths in pPaths are ignored.

  If this represents a change, all registered TreeSelectionListeners are notified.

  The lead path is set to the last unique path.

  The paths returned from getSelectionPaths are in the same order as those supplied to this method.

  Specified by:

  setSelectionPaths in interface TreeSelectionModel

  Parameters:

  pPaths - the new selection

• addSelectionPath

  public void addSelectionPath(TreePath path)

  Adds path to the current selection. If path is not currently in the selection the TreeSelectionListeners are notified. This has no effect if path is null.

  Specified by:

  addSelectionPath in interface TreeSelectionModel

  Parameters:

  path - the new path to add to the current selection

• addSelectionPaths

  public void addSelectionPaths(TreePath[] paths)

  Adds paths to the current selection. If any of the paths in paths are not currently in the selection the TreeSelectionListeners are notified. This has no effect if paths is null.

  The lead path is set to the last element in paths.

  If the selection mode is CONTIGUOUS_TREE_SELECTION, and adding the new paths would make the selection discontiguous. Then two things can result: if the TreePaths in paths are contiguous, then the selection becomes these TreePaths, otherwise the TreePaths aren't contiguous and the selection becomes the first TreePath in paths.

  Specified by:

  addSelectionPaths in interface TreeSelectionModel

  Parameters:

  paths - the new path to add to the current selection

• removeSelectionPath

  public void removeSelectionPath(TreePath path)

  Removes path from the selection. If path is in the selection The TreeSelectionListeners are notified. This has no effect if path is null.

  Specified by:

  removeSelectionPath in interface TreeSelectionModel

  Parameters:

  path - the path to remove from the selection

• removeSelectionPaths

  public void removeSelectionPaths(TreePath[] paths)

  Removes paths from the selection. If any of the paths in paths are in the selection the TreeSelectionListeners are notified. This has no effect if paths is null.

  Specified by:

  removeSelectionPaths in interface TreeSelectionModel

  Parameters:

  paths - the paths to remove from the selection

• getSelectionPath

  public TreePath getSelectionPath()

  Returns the first path in the selection. This is useful if there if only one item currently selected.

  Specified by:

  getSelectionPath in interface TreeSelectionModel

• getSelectionPaths

  public TreePath[] getSelectionPaths()

  Returns the selection.

  Specified by:

  getSelectionPaths in interface TreeSelectionModel

  Returns:

  the selection

• getSelectionCount

  public int getSelectionCount()

  Returns the number of paths that are selected.

  Specified by:

  getSelectionCount in interface TreeSelectionModel

• isPathSelected

  public boolean isPathSelected(TreePath path)

  Returns true if the path, path, is in the current selection.

  Specified by:

  isPathSelected in interface TreeSelectionModel

• isSelectionEmpty

  public boolean isSelectionEmpty()

  Returns true if the selection is currently empty.

  Specified by:

  isSelectionEmpty in interface TreeSelectionModel

• clearSelection

  public void clearSelection()

  Empties the current selection. If this represents a change in the current selection, the selection listeners are notified.

  Specified by:

  clearSelection in interface TreeSelectionModel

• addTreeSelectionListener

  public void addTreeSelectionListener(TreeSelectionListener x)

  Adds x to the list of listeners that are notified each time the set of selected TreePaths changes.

  Specified by:

  addTreeSelectionListener in interface TreeSelectionModel

  Parameters:

  x - the new listener to be added

• removeTreeSelectionListener

  public void removeTreeSelectionListener(TreeSelectionListener x)

  Removes x from the list of listeners that are notified each time the set of selected TreePaths changes.

  Specified by:

  removeTreeSelectionListener in interface TreeSelectionModel

  Parameters:

  x - the listener to remove

• getTreeSelectionListeners

  public TreeSelectionListener[] getTreeSelectionListeners()

  Returns an array of all the tree selection listeners registered on this model.

  Returns:

  all of this model's TreeSelectionListeners or an empty array if no tree selection listeners are currently registered

  Since:

  1.4

  See Also:

  addTreeSelectionListener(javax.swing.event.TreeSelectionListener), removeTreeSelectionListener(javax.swing.event.TreeSelectionListener)

• fireValueChanged

  protected void fireValueChanged(TreeSelectionEvent e)

  Notifies all listeners that are registered for tree selection events on this object.

  See Also:

  addTreeSelectionListener(javax.swing.event.TreeSelectionListener), EventListenerList

• getListeners

  public <T extends EventListener> T[] getListeners(Class<T> listenerType)

  Returns an array of all the objects currently registered as FooListeners upon this model. FooListeners are registered using the addFooListener method.

  You can specify the listenerType argument with a class literal, such as FooListener.class. For example, you can query a DefaultTreeSelectionModel m for its tree selection listeners with the following code:

  TreeSelectionListener[] tsls = (TreeSelectionListener[])(m.getListeners(TreeSelectionListener.class));

  If no such listeners exist, this method returns an empty array.

  Parameters:

  listenerType - the type of listeners requested; this parameter should specify an interface that descends from java.util.EventListener

  Returns:

  an array of all objects registered as FooListeners on this component, or an empty array if no such listeners have been added

  Throws:

  ClassCastException - if listenerType doesn't specify a class or interface that implements java.util.EventListener

  Since:

  1.3

  See Also:

  getTreeSelectionListeners(), getPropertyChangeListeners()

• getSelectionRows

  public int[] getSelectionRows()

  Returns the selection in terms of rows. There is not necessarily a one-to-one mapping between the TreePaths returned from getSelectionPaths and this method. In particular, if a TreePath is not viewable (the RowMapper returns -1 for the row corresponding to the TreePath), then the corresponding row is not included in the returned array. For example, if the selection consists of two paths, A and B, with A at row 10, and B not currently viewable, then this method returns an array with the single entry 10.

  Specified by:

  getSelectionRows in interface TreeSelectionModel

  Returns:

  the selection in terms of rows

• getMinSelectionRow

  public int getMinSelectionRow()

  Returns the smallest value obtained from the RowMapper for the current set of selected TreePaths. If nothing is selected, or there is no RowMapper, this will return -1.

  Specified by:

  getMinSelectionRow in interface TreeSelectionModel

• getMaxSelectionRow

  public int getMaxSelectionRow()

  Returns the largest value obtained from the RowMapper for the current set of selected TreePaths. If nothing is selected, or there is no RowMapper, this will return -1.

  Specified by:

  getMaxSelectionRow in interface TreeSelectionModel

• isRowSelected

  public boolean isRowSelected(int row)

  Returns true if the row identified by row is selected.

  Specified by:

  isRowSelected in interface TreeSelectionModel

• resetRowSelection

  public void resetRowSelection()

  Updates this object's mapping from TreePath to rows. This should be invoked when the mapping from TreePaths to integers has changed (for example, a node has been expanded).

  You do not normally have to call this, JTree and its associated Listeners will invoke this for you. If you are implementing your own View class, then you will have to invoke this.

  This will invoke insureRowContinuity to make sure the currently selected TreePaths are still valid based on the selection mode.

  Specified by:

  resetRowSelection in interface TreeSelectionModel

• getLeadSelectionRow

  public int getLeadSelectionRow()

  Returns the lead selection index. That is the last index that was added.

  Specified by:

  getLeadSelectionRow in interface TreeSelectionModel

• getLeadSelectionPath

  public TreePath getLeadSelectionPath()

  Returns the last path that was added. This may differ from the leadSelectionPath property maintained by the JTree.

  Specified by:

  getLeadSelectionPath in interface TreeSelectionModel

• addPropertyChangeListener

  public void addPropertyChangeListener(PropertyChangeListener listener)

  Adds a PropertyChangeListener to the listener list. The listener is registered for all properties.

  A PropertyChangeEvent will get fired when the selection mode changes.

  Specified by:

  addPropertyChangeListener in interface TreeSelectionModel

  Parameters:

  listener - the PropertyChangeListener to be added

• removePropertyChangeListener

  public void removePropertyChangeListener(PropertyChangeListener listener)

  Removes a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.

  Specified by:

  removePropertyChangeListener in interface TreeSelectionModel

  Parameters:

  listener - the PropertyChangeListener to be removed

• getPropertyChangeListeners

  public PropertyChangeListener[] getPropertyChangeListeners()

  Returns an array of all the property change listeners registered on this DefaultTreeSelectionModel.

  Returns:

  all of this model's PropertyChangeListeners or an empty array if no property change listeners are currently registered

  Since:

  1.4

  See Also:

  addPropertyChangeListener(java.beans.PropertyChangeListener), removePropertyChangeListener(java.beans.PropertyChangeListener)

• insureRowContinuity

  protected void insureRowContinuity()

  Makes sure the currently selected TreePaths are valid for the current selection mode. If the selection mode is CONTIGUOUS_TREE_SELECTION and a RowMapper exists, this will make sure all the rows are contiguous, that is, when sorted all the rows are in order with no gaps. If the selection isn't contiguous, the selection is reset to contain the first set, when sorted, of contiguous rows.

  If the selection mode is SINGLE_TREE_SELECTION and more than one TreePath is selected, the selection is reset to contain the first path currently selected.

• arePathsContiguous

  protected boolean arePathsContiguous(TreePath[] paths)

  Returns true if the paths are contiguous, or this object has no RowMapper.

• canPathsBeAdded

  protected boolean canPathsBeAdded(TreePath[] paths)

  Used to test if a particular set of TreePaths can be added. This will return true if paths is null (or empty), or this object has no RowMapper, or nothing is currently selected, or the selection mode is DISCONTIGUOUS_TREE_SELECTION, or adding the paths to the current selection still results in a contiguous set of TreePaths.

• canPathsBeRemoved

  protected boolean canPathsBeRemoved(TreePath[] paths)

  Returns true if the paths can be removed without breaking the continuity of the model. This is rather expensive.

• notifyPathChange

  @Deprecated
  protected void notifyPathChange(Vector<?> changedPaths,
                                              TreePath oldLeadSelection)

  Deprecated. As of JDK version 1.7
  Notifies listeners of a change in path. changePaths should contain instances of PathPlaceHolder.

• updateLeadIndex

  protected void updateLeadIndex()

  Updates the leadIndex instance variable.

• insureUniqueness

  protected void insureUniqueness()

  This method is obsolete and its implementation is now a noop. It's still called by setSelectionPaths and addSelectionPaths, but only for backwards compatibility.

• toString

  public String toString()

  Returns a string that displays and identifies this object's properties.

  Overrides:

  toString in class Object

  Returns:

  a String representation of this object

• clone

  public Object clone()
               throws CloneNotSupportedException

  Returns a clone of this object with the same selection. This method does not duplicate selection listeners and property listeners.

  Overrides:

  clone in class Object

  Returns:

  a clone of this instance.

  Throws:

  CloneNotSupportedException - never thrown by instances of this class

  See Also:

  Cloneable