VariableHeightLayoutCache JDK 1.6)

Methods

public Rectangle getBounds (TreePath path, Rectangle placeIn) [Specified in AbstractLayoutCache]

Returns the Rectangle enclosing the label portion into which the item identified by path will be drawn.

Returns the Rectangle enclosing the label portion
into which the item identified by path will be drawn.
Returns: the bounds of the enclosing rectangle or null if the node could not be ascertained
Parameters:
- path - the path to be drawn
- placeIn - the bounds of the enclosing rectangle

public boolean getExpandedState (TreePath path) [Specified in AbstractLayoutCache]

Returns true if the path is expanded, and visible.

public TreeModel getModel () [Inherited From AbstractLayoutCache]

Returns the TreeModel that is providing the data.

Returns the TreeModel that is providing the data.
Returns: the TreeModel that is providing the data

public NodeDimensions getNodeDimensions () [Inherited From AbstractLayoutCache]

Returns the object that renders nodes in the tree, and which is responsible for calculating the dimensions of individual nodes.

Returns the object that renders nodes in the tree, and which is
responsible for calculating the dimensions of individual nodes.
Returns: the NodeDimensions object

protected Rectangle getNodeDimensions (Object value, int row, int depth, boolean expanded, Rectangle placeIn) [Inherited From AbstractLayoutCache]

Returns, by reference in placeIn, the size needed to represent value.

Returns, by reference in placeIn,
the size needed to represent value.
If inPlace is null, a newly created
Rectangle should be returned, otherwise the value
should be placed in inPlace and returned. This will
return null if there is no renderer.
Returns: a Rectangle containing the node dimensions, or null if node has no dimension
Parameters:
- value - the value to be represented
- row - row being queried
- depth - the depth of the row
- expanded - true if row is expanded, false otherwise
- placeIn - a Rectangle containing the size needed to represent value

public TreePath getPathClosestTo (int x, int y) [Specified in AbstractLayoutCache]

Returns the path to the node that is closest to x,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 will 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.
Returns: the path to the node that is closest to x, y
Parameters:
- x - the x-coordinate
- y - the y-coordinate

public TreePath getPathForRow (int row) [Specified in AbstractLayoutCache]

Returns the path for row.

Returns the path for row. If row
is not visible, null is returned.
Returns: the path for row, or null if row is not visible
Parameters:
- row - the location of interest

public int getPreferredHeight () [Overrides AbstractLayoutCache]

Returns the preferred height.

public int getPreferredWidth (Rectangle bounds) [Overrides AbstractLayoutCache]

Returns the preferred width and height for the region in visibleRegion.

Returns the preferred width and height for the region in
visibleRegion.
Parameters:
- bounds - the region being queried

public int getRowCount () [Specified in AbstractLayoutCache]

Returns the number of visible rows.

public int getRowForPath (TreePath path) [Specified in AbstractLayoutCache]

Returns the row where the last item identified in path is visible.

Returns the row where the last item identified in path is visible.
Will return -1 if any of the elements in path are not
currently visible.
Returns: the row where the last item in path is visible
Parameters:
- path - the TreePath of interest

public int getRowHeight () [Inherited From AbstractLayoutCache]

Returns the height of each row.

public int getRowsForPaths (TreePath paths) [Inherited From AbstractLayoutCache]

Returns the rows that the TreePath instances in path are being displayed at.

Returns the rows that the TreePath instances in
path are being displayed at.
This method should return an array of the same length as that passed
in, and if one of the TreePaths
in path is not valid its entry in the array should
be set to -1.
Returns: an array of the same length that is passed in containing the rows that each corresponding where each TreePath is displayed; if paths is null, null is returned
Parameters:
- paths - the array of TreePaths being queried

public TreeSelectionModel getSelectionModel () [Inherited From AbstractLayoutCache]

Returns the model used to maintain the selection.

Returns the model used to maintain the selection.
Returns: the treeSelectionModel

public int getVisibleChildCount (TreePath path) [Specified in AbstractLayoutCache]

Returns the number of visible children for path.

Returns the number of visible children for path.
Returns: the number of visible children for path

public Enumeration<TreePath> getVisiblePathsFrom (TreePath path) [Specified in AbstractLayoutCache]

Returns an Enumerator that increments over the visible paths starting at the passed in location.

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.
Returns: an Enumerator that increments over the visible paths
Parameters:
- path - the location in the TreePath to start

public void invalidatePathBounds (TreePath path) [Specified in AbstractLayoutCache]

Instructs the LayoutCache that the bounds for path are invalid, and need to be updated.

Instructs the LayoutCache that the bounds for
path are invalid, and need to be updated.
Parameters:
- path - the TreePath which is now invalid

public void invalidateSizes () [Specified in AbstractLayoutCache]

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

public boolean isExpanded (TreePath path) [Specified in AbstractLayoutCache]

Returns true if the value identified by path is currently expanded.

Returns true if the value identified by path is
currently expanded.
Returns: true if the value identified by path is currently expanded

protected boolean isFixedRowHeight () [Inherited From AbstractLayoutCache]

Returns true if the height of each row is a fixed size.

public boolean isRootVisible () [Inherited From AbstractLayoutCache]

Returns true if the root node of the tree is displayed.

public void setExpandedState (TreePath path, boolean isExpanded) [Specified in AbstractLayoutCache]

Marks the path path expanded state to isExpanded.

Marks the path path expanded state to
isExpanded.
Parameters:
- path - the TreePath of interest
- isExpanded - true if the path should be expanded, otherwise false

public void setModel (TreeModel newModel) [Overrides AbstractLayoutCache]

Sets the TreeModel that will provide the data.

Sets the TreeModel that will provide the data.
Parameters:
- newModel - the TreeModel that is to provide the data

public void setNodeDimensions (NodeDimensions nd) [Overrides AbstractLayoutCache]

Sets the renderer that is responsible for drawing nodes in the tree.

public void setRootVisible (boolean rootVisible) [Overrides AbstractLayoutCache]

Determines whether or not the root node from the TreeModel is visible.

Determines whether or not the root node from
the TreeModel is visible.
Parameters:
- rootVisible - true if the root node of the tree is to be displayed
See Also: AbstractLayoutCache.rootVisible,

public void setRowHeight (int rowHeight) [Overrides AbstractLayoutCache]

Sets the height of each cell.

public void setSelectionModel (TreeSelectionModel newLSM) [Inherited From AbstractLayoutCache]

Sets the TreeSelectionModel used to manage the selection to new LSM.

Sets the TreeSelectionModel used to manage the
selection to new LSM.
Parameters:
- newLSM - the new TreeSelectionModel

public void treeNodesChanged (TreeModelEvent e) [Specified in AbstractLayoutCache]

Invoked after a node (or a set of siblings) has changed in some way.

public void treeNodesInserted (TreeModelEvent e) [Specified in AbstractLayoutCache]

Invoked after nodes have been inserted into the tree.

public void treeNodesRemoved (TreeModelEvent e) [Specified in AbstractLayoutCache]

Invoked after nodes have been removed from the tree.

public void treeStructureChanged (TreeModelEvent e) [Specified in AbstractLayoutCache]

Invoked after the tree has drastically changed structure from a given node down.

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.
Parameters:
- e - the TreeModelEvent of interest