Get TreeItem from Mouse position in mouse down event : Tree Event « SWT « Java Tutorial

1. Java Tutorial
2. SWT
3. Tree Event

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;

public class TreeItemMousePostion {

  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    final Tree tree = new Tree(shell, SWT.BORDER | SWT.MULTI);
    for (int i = 0; i < 12; i++) {
      TreeItem treeItem = new TreeItem(tree, SWT.NONE);
      treeItem.setText("Item " + i);
    }
    tree.addListener(SWT.MouseDown, new Listener() {
      public void handleEvent(Event event) {
        Point point = new Point(event.x, event.y);
        TreeItem item = tree.getItem(point);
        if (item != null) {
          System.out.println("Mouse down: " + item);
        }
      }
    });
    tree.setSize(200, 200);
    shell.setSize(300, 300);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }

}

17.60.Tree Event
	17.60.1.	Tree event: Measure TreeItem, Paint TreeItem and Erase TreeItem
	17.60.2.	Get TreeItem from Mouse position in mouse down event
	17.60.3.	Limit selection to items that match a pattern
	17.60.4.	Tree node Collapse listener
	17.60.5.	Tree Exapand listener
	17.60.6.	Tree node selection listener
	17.60.7.	Tree default selection listener
	17.60.8.	Tree node selection event