Removing checkbox functionality from parent nodes.

[its-c10]

Hi there. I have a tree with multiple layers. I want to completely remove the checkbox and it's functionality from the root nodes.

So far, I have been able to remove the checkbox from the root nodes, via setting selectable=false to those nodes but I can still click on the node content and act as if it still has a checkbox (It checks all it's children).

How can I remove this functionality?

[vieira-brz]

To completely disable the checkbox functionality, including the selection of child nodes when clicking on the content of root nodes in a tree component, you need to implement a more detailed control of the selection behavior at the component level. This often involves adjusting both the component configuration and possibly adding some custom scripting to manage user interactions.

Here are some steps and methods to achieve this in a tree component, assuming you're using a UI framework that supports such configurations:

1. Disable Selection Propagation

First, you need to ensure that the selection does not propagate from the root nodes to their children. This can be configured through properties or options in your tree component depending on the framework being used. Here’s a general approach:

// Example configuration for a generic tree component
const treeData = [
  {
    label: 'Root Node',
    selectable: false,  // You have this set already
    children: [
      { label: 'Child Node 1', selectable: true },
      { label: 'Child Node 2', selectable: true }
    ]
  },
  // More nodes...
];

2. Intercept Click Events

If the tree component still allows selection of child nodes when clicking on the content of a root node even after disabling selectability, you might need to intercept click events and prevent them from propagating:

function handleNodeClick(event, node) {
  if (node.isRoot) {  // Assuming you can determine if the node is a root node
    event.preventDefault();
    return false;  // Stop the event from propagating
  }
  // Handle other nodes normally
}

This function needs to be attached to the node click event handler in your component configuration.

3. Customize CSS

If the tree component visually changes when you click the root nodes (like highlighting), you might want to override this behavior using CSS:

.tree-root-node {
  pointer-events: none;  // Disables mouse events on root nodes
}

Or, more selectively:

.tree-root-node .tree-node-content {
  pointer-events: none;  // Disables mouse events on the clickable areas of root nodes
}

4. Configure Event Handling in Your Framework

Depending on the JavaScript framework or library you're using, integrating the above logic can vary. Here’s an example using a Vue.js component:

<template>
  <Tree :data="treeData" @node-click="handleNodeClick" />
</template>

<script>
export default {
  data() {
    return {
      treeData: [/* tree data as defined earlier */]
    };
  },
  methods: {
    handleNodeClick(event, node) {
      if (node.isRoot) {
        event.preventDefault();
        return false;
      }
    }
  }
}
</script>

5. Review Documentation

Ensure you review your specific framework or library's documentation for handling tree structures. Many UI libraries like PrimeVue, PrimeReact, or Angular Material have their own methods and events for managing node interactions which might offer a cleaner or more integrated solution.

By combining these adjustments, you should be able to control the selection behavior of your tree component fully and prevent any unintended selections or interactions with the root nodes.