[cp-patches] Patch: expand/collapse for JTree

[Lillian Angel]

Here is the patch for expanding and collapsing the JTree. It appears to
be fully functional. The only remaining issues with expand/collapse are:
the extra long lines drawn vertically for subfolders and the
expand/collapse icons do not appear. The reason for the icons is that,
they are not loaded in the BasicLookAndFeel class.

For selection, I still need to implement the CONTIGUOUS_TREE_SELECTION
option.

There are some other functions/features that I still need to implement.

2005-07-06  Lillian Angel  <address@hidden>

        * javax/swing/JTree.java
                Initialized the HashTable.
                (addSelectionPath): removed redundant code.
                (doExpandParents): added in line so that state is 
                changed for current path. Changed while loop to if 
                statement, an infinite loop was occurring.
        * javax/swing/plaf/basic/BasicTreeUI.java
                (getPathForRow): Implemented to work with visibility.
                (isLeaf): Implemented
                (mouseClicked): add in check for expand/collapse. 
                Selection for DISCONTIGUOUS tree selection is 
                implemented.
                (treeExpanded): called repaint, so the tree updates 
                visually when something is expanded.
                (treeCollapse): Similar to treeExpanded.
                (paintLeaf): changed to paint leaf only when visible.
                (paintNonLeaf): paints only when visible.
                (paintRecursive): lines for tree are only painted when 
                needed. checked for visibility of current object and 
                parent.
        * javax/swing/tree/DefaultTreeCellRenderer.java
                (getTreeCellRendererComponent): setting icons when 
                expanded.
        * javax/swing/tree/DefaultTreeSelectionModel.java
                (clearSelection): set leadPath to null because selection
                should be completely reset.

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