To create an attractive tree view of records using Apex and Visualforce, you can follow these steps:
1. Create a Visualforce page:
Start by creating a Visualforce page where you will display the tree view of records.
<apex:page controller="TreeViewController">
<apex:form>
<apex:pageBlock>
<apex:pageBlockSection>
<apex:outputPanel id="treePanel">
<ul id="tree">
<apex:repeat value="{!treeNodes}" var="node">
<li>
<apex:outputText value="{!node.name}" styleClass="node-label" />
<ul>
<apex:repeat value="{!node.children}" var="child">
<li>
<apex:outputText value="{!child.name}" styleClass="node-label" />
<!-- Repeat the above pattern for nested children if needed -->
</li>
</apex:repeat>
</ul>
</li>
</apex:repeat>
</ul>
</apex:outputPanel>
</apex:pageBlockSection>
</apex:pageBlock>
</apex:form>
</apex:page>
2. Create a controller class:
Create a controller class that will handle the logic for the Visualforce page. This class will generate the tree structure of records.
public class TreeViewController {
public List<TreeNode> treeNodes { get; set; }
public TreeViewController() {
treeNodes = new List<TreeNode>();
// Generate your tree structure here
// Example:
TreeNode rootNode = new TreeNode('Root');
TreeNode childNode1 = new TreeNode('Child 1');
TreeNode childNode2 = new TreeNode('Child 2');
TreeNode grandchildNode1 = new TreeNode('Grandchild 1');
TreeNode grandchildNode2 = new TreeNode('Grandchild 2');
childNode1.children.add(grandchildNode1);
childNode1.children.add(grandchildNode2);
rootNode.children.add(childNode1);
rootNode.children.add(childNode2);
treeNodes.add(rootNode);
}
public class TreeNode {
public String name { get; set; }
public List<TreeNode> children { get; set; }
public TreeNode(String name) {
this.name = name;
children = new List<TreeNode>();
}
}
}
In this example, the controller class generates a sample tree structure using the 'TreeNode' class. Each 'TreeNode' object represents a node in the tree and contains a name and a list of child nodes.
3. Save the Visualforce page and the controller class:
Save the Visualforce page with a suitable name, such as "TreeViewPage", and the controller class with a suitable name, such as "TreeViewController".
4. Add CSS styles:
To make the tree view visually attractive, you can add CSS styles to the Visualforce page or in a separate CSS file. Here's an example of adding styles to the Visualforce page:
<style>
ul#tree {
list-style-type: none;
padding: 0;
}
ul#tree li {
margin-bottom: 10px;
}
.node-label {
display: inline-block;
margin-left: 10px;
cursor: pointer;
}
</style>
Customize the styles as per your design preferences.
5. Access the Visualforce page:
You can access the Visualforce page by appending its name to the Salesforce organization URL/