1 files changed, 36 insertions, 0 deletions
diff --git a/base/src/main/java/bjc/utils/gui/browser/JBrowserModel.java b/base/src/main/java/bjc/utils/gui/browser/JBrowserModel.java
new file mode 100644
index 0000000..d95badc
--- /dev/null
+++ b/base/src/main/java/bjc/utils/gui/browser/JBrowserModel.java
@@ -0,0 +1,36 @@
+package bjc.utils.gui.browser;
+
+/** Data model for JBrowser (hierarchical, like TreeModel but simpler). */
+public interface JBrowserModel {
+	Object getRoot();
+
+	int getChildCount(Object parent);
+
+	Object getChild(Object parent, int index);
+
+	default int indexOfChild(Object parent, Object child) {
+		int n = getChildCount(parent);
+		for (int i = 0; i < n; i++)
+			if (getChild(parent, i).equals(child))
+				return i;
+		return -1;
+	}
+
+	boolean isLeaf(Object node);
+
+	/** Display text for nodes (used by default renderer & default filter). */
+	default String getText(Object node) {
+		return String.valueOf(node);
+	}
+
+	/** True if node can expand (used by default renderer). */
+	default boolean isExpandable(Object node) {
+		return !isLeaf(node);
+	}
+
+	/** Header text for the column that is showing the children of parentNode. */
+	default String getColumnHeader(Object parentNode, int depthFromRoot) {
+		String t = getText(parentNode);
+		return (t == null || t.isEmpty()) ? "(root)" : t;
+	}
+}
+\ No newline at end of file