Source Code : Displays a single-selection tree, a multi-selection tree, and a checkbox tree

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Displays a single-selection tree, a multi-selection tree, and a checkbox tree

//Send questions, comments, bug reports, etc. to the authors:

//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)

import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

/**
 * Displays a single-selection tree, a multi-selection tree, and a checkbox tree
 */
public class SWTTreeExample {
  /**
   * Runs the application
   */
  public void run() {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("TreeExample");
    createContents(shell);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }

  private void createContents(Composite composite) {
    // Set the single-selection tree in the upper left,
    // the multi-selection tree in the upper right,
    // and the checkbox tree across the bottom.
    // To do this, create a 1x2 grid, and in the top
    // cell, a 2x1 grid.
    composite.setLayout(new GridLayout(1, true));
    Composite top = new Composite(composite, SWT.NONE);
    GridData data = new GridData(GridData.FILL_BOTH);
    top.setLayoutData(data);

    top.setLayout(new GridLayout(2, true));
    Tree single = new Tree(top, SWT.SINGLE | SWT.BORDER);
    data = new GridData(GridData.FILL_BOTH);
    single.setLayoutData(data);
    fillTree(single);

    Tree multi = new Tree(top, SWT.MULTI | SWT.BORDER);
    data = new GridData(GridData.FILL_BOTH);
    multi.setLayoutData(data);
    fillTree(multi);

    Tree check = new Tree(composite, SWT.CHECK | SWT.BORDER);
    data = new GridData(GridData.FILL_BOTH);
    check.setLayoutData(data);
    fillTree(check);
  }

  /**
   * Helper method to fill a tree with data
   * 
   * @param tree the tree to fill
   */
  private void fillTree(Tree tree) {
    // Turn off drawing to avoid flicker
    tree.setRedraw(false);

    // Create five root items
    for (int i = 0; i < 5; i++) {
      TreeItem item = new TreeItem(tree, SWT.NONE);
      item.setText("Root Item " + i);

      // Create three children below the root
      for (int j = 0; j < 3; j++) {
        TreeItem child = new TreeItem(item, SWT.NONE);
        child.setText("Child Item " + i + " - " + j);

        // Create three grandchildren under the child
        for (int k = 0; k < 3; k++) {
          TreeItem grandChild = new TreeItem(child, SWT.NONE);
          grandChild.setText("Grandchild Item " + i + " - " + j + " - " + k);
        }
      }
    }
    // Turn drawing back on!
    tree.setRedraw(true);
  }

  /**
   * The entry point for the application
   * 
   * @param args the command line arguments
   */
  public static void main(String[] args) {
    new SWTTreeExample().run();
  }
}


           
       

Thank with us