javaTree

Intent

Tree based implementation in Language:Java.

Motivation

This project was created at the PTT-Hackathon 2011.

The tree-based view allows the user to get a large overview of the hierarchy of the system:Company. The tree allows easy navigation within this hierarchy. The tree also provides quick adjustment on changes of the Feature:Hierarchical company data.

Illustration

The main features Feature:Cut, Feature:Total and Feature:Hierarchical company are adopted from Contribution:javaInheritance. The main difference to Contribution:swing is, that the navigation is simplified with a tree view. This tree has to be initialized recursively with the company as root:

/*
 * This method initializes the tree-view.
 */
private Component createTree() {
	Company company = model.getCompany(); // get company data

	DefaultMutableTreeNode root = new DefaultMutableTreeNode(company); // create root element

	for (Department d : company.getDepts()) { // run through the departments and add them to the root
		root.add(addDepartmentNode(d)); // create department subtrees
	}

	tree = new JTree(root);

	return new JScrollPane(tree); // return the JTree within a scroll pane
}

The department subtrees are created in a similar way.

Architecture

The main architecture of this project is MVC. The class Interaction.java starts the application and creates the main parts of the MVC-structure: The MainView.java creates the tree and provides a container for the single views of the company, departments and employees. These views are initialized by the Controller.java while the data and the selected element of the tree is stored in the Model.java. The main features Feature:Cut and Feature:Total can be found in org.softlang.operations while the classes for the data structure are in org.softlang.company.

Usage

This project is provided as an Technology:Eclipse project.
After importing the project into Technology:Eclipse as Java Project, just run Interaction.java as Java Application.

The implementation has been tested with Java version 5.