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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package javax.swing.plaf;
import java.awt.Rectangle;
import javax.swing.JTree;
import javax.swing.tree.TreePath;
/**
* Pluggable look and feel interface for JTree.
*
* @author Rob Davis
* @author Scott Violet
*/
public abstract class TreeUI extends ComponentUI
{
/**
* Returns the Rectangle enclosing the label portion that the
* last item in path will be drawn into. Will return null if
* any component in path is currently valid.
*
* @param tree the {@code JTree} for {@code path}
* @param path the {@code TreePath} identifying the node
* @return the {@code Rectangle} enclosing the label portion that the
* last item in path will be drawn into, {@code null} if any
* component in path is currently valid.
*/
public abstract Rectangle getPathBounds(JTree tree, TreePath path);
/**
* Returns the path for passed in row. If row is not visible
* null is returned.
*
* @param tree a {@code JTree} object
* @param row an integer specifying a row
* @return the {@code path} for {@code row} or {@code null} if {@code row}
* is not visible
*/
public abstract TreePath getPathForRow(JTree tree, int row);
/**
* 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.
*
* @param tree the {@code JTree} for {@code path}
* @param path the {@code TreePath} object to look in
* @return an integer specifying the row at which the last item
* identified is visible, -1 if any of the elements in
* {@code path} are not currently visible
*/
public abstract int getRowForPath(JTree tree, TreePath path);
/**
* Returns the number of rows that are being displayed.
*
* @param tree the {@code JTree} for which to count rows
* @return an integer specifying the number of row being displayed
*/
public abstract int getRowCount(JTree tree);
/**
* 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.
*
* @param tree a {@code JTree} object
* @param x an integer giving the number of pixels horizontally from the
* left edge of the display area
* @param y an integer giving the number of pixels vertically from the top
* of the display area, minus any top margin
* @return the {@code TreePath} node closest to {@code x,y} or {@code null}
* if there is nothing currently visible
*/
public abstract TreePath getClosestPathForLocation(JTree tree, int x,
int y);
/**
* Returns true if the tree is being edited. The item that is being
* edited can be returned by getEditingPath().
*
* @param tree a {@code JTree} object
* @return true if {@code tree} is being edited
*/
public abstract boolean isEditing(JTree tree);
/**
* Stops the current editing session. This has no effect if the
* tree isn't being edited. Returns true if the editor allows the
* editing session to stop.
*
* @param tree a {@code JTree} object
* @return true if the editor allows the editing session to stop
*/
public abstract boolean stopEditing(JTree tree);
/**
* Cancels the current editing session. This has no effect if the
* tree isn't being edited.
*
* @param tree a {@code JTree} object
*/
public abstract void cancelEditing(JTree tree);
/**
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