javax.swing.tree.FixedHeightLayoutCache

FixedHeightLayoutCache

Java SE 6

NOTE: This will become more open in a future release.

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 java.beans.XMLEncoder.

version 1.25 11/17/05

Constructors

public

FixedHeightLayoutCache()

Methods

public void

invalidatePathBounds(TreePath path)
Does nothing, FixedHeightLayoutCache doesn't cache width, and that is all that could change.

public void

invalidateSizes()
Informs the TreeState that it needs to recalculate all the sizes it is referencing.

public void

treeNodesChanged(TreeModelEvent e)

Invoked after a node (or a set of siblings) has changed in some way. The node(s) have not changed locations in the tree or altered their children arrays, but other attributes have changed and may affect presentation. Example: the name of a file has changed, but it is in the same location in the file system.

e.path() returns the path the parent of the changed node(s).

e.childIndices() returns the index(es) of the changed node(s).

public void

treeNodesInserted(TreeModelEvent e)

Invoked after nodes have been inserted into the tree.

e.path() returns the parent of the new nodes

e.childIndices() returns the indices of the new nodes in ascending order.

public void

treeNodesRemoved(TreeModelEvent e)

Invoked after nodes have been removed from the tree. Note that if a subtree is removed from the tree, this method may only be invoked once for the root of the removed subtree, not once for each individual set of siblings removed.

e.path() returns the former parent of the deleted nodes.

e.childIndices() returns the indices the nodes had before they were deleted in ascending order.

public void

treeStructureChanged(TreeModelEvent e)

Invoked after the tree has drastically changed structure from a given node down. If the path returned by e.getPath() is of length one and the first element does not identify the current root node the first element should become the new root of the tree.

e.path() holds the path to the node.

e.childIndices() returns null.

Properties

public Rectangle

getBounds(TreePath path, Rectangle placeIn)
Returns a rectangle giving the bounds needed to draw path.

path	a TreePath specifying a node
placeIn	a Rectangle object giving the available space
return	a Rectangle object specifying the space to be used

public boolean

isExpanded(TreePath path)
Returns true if the value identified by row is currently expanded.

public void

setExpandedState(TreePath path, boolean isExpanded)
Marks the path path expanded state to isExpanded.

public boolean

getExpandedState(TreePath path)
Returns true if the path is expanded, and visible.

public void

setModel(TreeModel newModel)
Sets the TreeModel that will provide the data.

newModel

the TreeModel that is to provide the data

public TreePath

getPathClosestTo(int x, int y)
Returns the path to the node that is closest to x,y. If there is nothing currently visible this will return null, otherwise it'll always return a valid path. If you need to test if the returned object is exactly at x, y you should get the bounds for the returned path and test x, y against that.

public TreePath

getPathForRow(int row)
Returns the path for passed in row. If row is not visible null is returned.

public void

setRootVisible(boolean rootVisible)
Determines whether or not the root node from the TreeModel is visible.

rootVisible	true if the root node of the tree is to be displayed
See also	rootVisible

public int

getRowCount()
Returns the number of visible rows.

public int

getRowForPath(TreePath path)
Returns the row that the last item identified in path is visible at. Will return -1 if any of the elements in path are not currently visible.

public void

setRowHeight(int rowHeight)
Sets the height of each cell. If rowHeight is less than or equal to 0 this will throw an IllegalArgumentException.

rowHeight

the height of each cell, in pixels

public int

getVisibleChildCount(TreePath path)
Returns the number of visible children for row.

public Enumeration

getVisiblePathsFrom(TreePath path)
Returns an Enumerator that increments over the visible paths starting at the passed in location. The ordering of the enumeration is based on how the paths are displayed.

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Java SE 6