public abstract class AbstractLayoutCache extends Object implements RowMapper
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|Modifier and Type||Class and Description|
protected AbstractLayoutCache.NodeDimensions nodeDimensions
Object responsible for getting the size of a node.
protected TreeModel treeModel
Model providing information.
protected TreeSelectionModel treeSelectionModel
protected boolean rootVisible
True if the root node is displayed, false if its children are the highest visible nodes.
protected int rowHeight
Height to use for each row. If this is <= 0 the renderer will be used to determine the height for each row.
public void setNodeDimensions(AbstractLayoutCache.NodeDimensions nd)
Sets the renderer that is responsible for drawing nodes in the tree and which is therefore responsible for calculating the dimensions of individual nodes.
public AbstractLayoutCache.NodeDimensions getNodeDimensions()
Returns the object that renders nodes in the tree, and which is responsible for calculating the dimensions of individual nodes.
public void setModel(TreeModel newModel)
TreeModel that will provide the data.
TreeModelthat is to provide the data
public TreeModel getModel()
TreeModel that is providing the data.
TreeModelthat is providing the data
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
public boolean isRootVisible()
Returns true if the root node of the tree is displayed.
public void setRowHeight(int rowHeight)
Sets the height of each cell. If the specified value is less than or equal to zero the current cell renderer is queried for each row's height.
rowHeight- the height of each cell, in pixels
public int getRowHeight()
Returns the height of each row. If the returned value is less than or equal to 0 the height for each row is determined by the renderer.
public void setSelectionModel(TreeSelectionModel newLSM)
TreeSelectionModel used to manage the selection to new LSM.
newLSM- the new
public TreeSelectionModel getSelectionModel()
Returns the model used to maintain the selection.
public int getPreferredHeight()
Returns the preferred height.
public int getPreferredWidth(Rectangle bounds)
Returns the preferred width for the passed in region. The region is defined by the path closest to
(bounds.x, bounds.y) and ends at
bounds.height + bounds.y. If
null, the preferred width for all the nodes will be returned (and this may be a VERY expensive computation).
bounds- the region being queried
public abstract boolean isExpanded(TreePath path)
Returns true if the value identified by row is currently expanded.
public abstract Rectangle getBounds(TreePath path, Rectangle placeIn)
Returns a rectangle giving the bounds needed to draw path.
TreePathspecifying a node
Rectangleobject giving the available space
Rectangleobject specifying the space to be used
public abstract TreePath getPathForRow(int row)
Returns the path for passed in row. If row is not visible
null is returned.
row- the row being queried
TreePathfor the given row
public abstract 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 abstract 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.
x- the horizontal component of the desired location
y- the vertical component of the desired location
TreePathclosest to the specified point
public abstract Enumeration<TreePath> getVisiblePathsFrom(TreePath path)
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. The first element of the returned enumeration will be path, unless it isn't visible, in which case
null will be returned.
path- the starting location for the enumeration
Enumeratorstarting at the desired location
public abstract int getVisibleChildCount(TreePath path)
Returns the number of visible children for row.
path- the path being queried
public abstract void setExpandedState(TreePath path, boolean isExpanded)
Marks the path
path expanded state to
path- the path being expanded or collapsed
isExpanded- true if the path should be expanded, false otherwise
public abstract boolean getExpandedState(TreePath path)
Returns true if the path is expanded, and visible.
path- the path being queried
public abstract int getRowCount()
Number of rows being displayed.
public abstract void invalidateSizes()
TreeState that it needs to recalculate all the sizes it is referencing.
public abstract void invalidatePathBounds(TreePath path)
LayoutCache that the bounds for
path are invalid, and need to be updated.
path- the path being updated
public abstract 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 abstract 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 abstract 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 abstract 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.
public int getRowsForPaths(TreePath paths)
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
path is not valid its entry in the array should be set to -1.
paths- the array of
TreePaths being queried
TreePathis displayed; if
protected Rectangle getNodeDimensions(Object value, int row, int depth, boolean expanded, Rectangle placeIn)
Returns, by reference in
placeIn, the size needed to represent
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.
valueto be represented
row- row being queried
depth- the depth of the row
expanded- true if row is expanded, false otherwise
Rectanglecontaining the size needed to represent
Rectanglecontaining the node dimensions, or
nullif node has no dimension
protected boolean isFixedRowHeight()
Returns true if the height of each row is a fixed size.
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