/* (non-Javadoc)
* @see javax.swing.tree.DefaultTreeCellRenderer#getTreeCellRendererComponent(javax.swing.JTree, java.lang.Object, boolean, boolean, boolean, int, boolean)
*/
public Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) {
super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
Folder f = getFolderForNode(value);
if (f != null) {
String folderName = f.getTitle();
if (folderName == null || folderName.length() == 0) {
folderName = f.getDataItemName();
}
if (f.getFolderIcon() != null) {
setIcon(f.getFolderIcon());
} else {
setText(folderName);
}
setToolTipText(f.getTooltip());
} else {
setToolTipText(null); // no tool tip
}
return this;
}
/**
* Create a new JTree using the root node as the root of the tree
*
* @return the newly created JTree
*/
private JTree getFolderTree() {
if (rootNode == null) {
throw new RuntimeException(Messages.getString(BUNDLE_NAME, "RootFolder.10")); // $NON-NLS-1$
}
final JTree tree = new JTree(rootNode);
// this tree is not editable
tree.setEditable(false);
// setup some default properties
tree.putClientProperty("JTree.lineStyle", "Angled"); // $NON-NLS-1$ //$NON-NLS-2$
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setShowsRootHandles(showHandles);
// set the cell renderer to display text and/or images
tree.setCellRenderer(new FolderIconRenderer());
/* when the user clicks on a tree node then load the Folder for the node
* that is clicked
*/
tree.addTreeSelectionListener(
new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent e) {
@SuppressWarnings("unused")
TreePath treePath = e.getNewLeadSelectionPath();
DefaultMutableTreeNode node =
(DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (node == null) {
return;
}
Object nodeInfo = node.getUserObject();
loadNodeObject(nodeInfo);
}
});
// the maximum hieght of each row in the JTree
int maxRowHeight = -1;
/* determine the maximum height of the nodes in the JTree by getting the
* maximum hieght of each Folder node in the tree. It is helpful if using images
* for Folder nodes that all images are the same height.
*/
Enumeration<TreeNode> e = rootNode.breadthFirstEnumeration();
DefaultMutableTreeNode node;
Folder f = getFolderForNode(rootNode);
// determine the maximum height of the root Folder node
if (f != null) {
ImageIcon icon;
if ((icon = f.getFolderIcon()) != null) {
maxRowHeight = Math.max(maxRowHeight, icon.getIconHeight());
}
}
// determine the maximum height of all child nodes
for (; e.hasMoreElements(); ) {
node = (DefaultMutableTreeNode) e.nextElement();
f = getFolderForNode(node);
if (f != null) {
ImageIcon icon;
if ((icon = f.getFolderIcon()) != null) {
maxRowHeight = Math.max(maxRowHeight, icon.getIconHeight());
}
}
}
// set the rowheight of the JTree to the maximum of the current height and the
// maximum Folder node height
int rowHeight = tree.getRowHeight();
if (maxRowHeight > rowHeight) {
tree.setRowHeight(maxRowHeight);
}
return tree;
}