Add a feature to disable a node.

Author: lucas-issa

README.md

@@ -115,3 +115,4 @@ Individual nodes within the `nodes` property can have the following structure:
 | `children`  | array  | An array of child nodes.        |
 | `className` | string | A className to add to the node. |
 | `icon`      | mixed  | A custom icon for the node.     |
+| `disabled`  | bool   | Disable node.                   |

src/js/CheckboxTree.js

@@ -191,12 +191,14 @@ class CheckboxTree extends React.Component {
 			const checked = this.getCheckState(node, noCascade);
 			const children = this.renderChildNodes(node);
 
+			const nodeDisabled = !!(disabled || node.disabled);
+
 			return (
 				<TreeNode
 					key={key}
 					checked={checked}
 					className={node.className}
-					disabled={disabled}
+					disabled={nodeDisabled}
 					expandDisabled={expandDisabled}
 					expanded={node.expanded}
 					icon={node.icon}

src/js/TreeNode.js

@@ -145,6 +145,7 @@ class TreeNode extends React.Component {
 			'rct-node': true,
 			'rct-node-parent': this.hasChildren(),
 			'rct-node-leaf': !this.hasChildren(),
+			'rct-disabled': disabled,
 		}, className);
 
 		return (