@Nullable
public static Object getTagAtForRenderer(
CheckboxTree.CheckboxTreeCellRenderer renderer, MouseEvent e) {
JTree tree = (JTree) e.getSource();
Object tag = null;
final TreePath path = tree.getPathForLocation(e.getX(), e.getY());
if (path != null) {
final Rectangle rectangle = tree.getPathBounds(path);
assert rectangle != null;
int dx = e.getX() - rectangle.x;
final TreeNode treeNode = (TreeNode) path.getLastPathComponent();
final int row = tree.getRowForLocation(e.getX(), e.getY());
tree.getCellRenderer()
.getTreeCellRendererComponent(tree, treeNode, false, false, true, row, true);
if (treeNode instanceof RepositoryNode) {
RepositoryNode repositoryNode = (RepositoryNode) treeNode;
int checkBoxWidth =
repositoryNode.isCheckboxVisible() ? renderer.getCheckbox().getWidth() : 0;
tag = renderer.getTextRenderer().getFragmentTagAt(dx - checkBoxWidth);
} else {
tag = renderer.getTextRenderer().getFragmentTagAt(dx);
}
}
return tag;
}
/**
* Handles mouse moved events.
*
* @param e the mouse event
*/
public void mouseMoved(MouseEvent e) {
TreePath path = tree.getPathForLocation(e.getX(), e.getY());
if (path == null) return;
if (e.getX() > tree.getPathBounds(path).x + hotspot - 3
|| e.getX() < tree.getPathBounds(path).x + 2) tree.setCursor(Cursor.getDefaultCursor());
else {
tree.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
}
}
public static void dropSelectionButUnderPoint(JTree tree, Point treePoint) {
final TreePath toRetain = tree.getPathForLocation(treePoint.x, treePoint.y);
if (toRetain == null) return;
TreePath[] selection = tree.getSelectionModel().getSelectionPaths();
selection = selection == null ? new TreePath[0] : selection;
for (TreePath each : selection) {
if (toRetain.equals(each)) continue;
tree.getSelectionModel().removeSelectionPath(each);
}
}
/**
* Handles mouse click events.
*
* @param e the mouse event
*/
public void mouseClicked(MouseEvent e) {
TreePath path = tree.getPathForLocation(e.getX(), e.getY());
if (path == null) return;
if (e.getX() > tree.getPathBounds(path).x + hotspot) return;
boolean selected = selectionModel.isAncestorSelected(path);
try {
ignoreEvents = true;
if (selected) {
selectionModel.removeSelectionPath(path);
} else {
selectionModel.addSelectionPath(path);
}
} finally {
ignoreEvents = false;
tree.treeDidChange();
}
}
public static boolean isOverSelection(final JTree tree, final Point point) {
TreePath path = tree.getPathForLocation(point.x, point.y);
return path != null && tree.getSelectionModel().isPathSelected(path);
}