TreeTable: Allow user to reorder columns and reorder columns programmatically. : TreeColumn TreeTable « SWT « Java Tutorial






TreeTable: Allow user to reorder columns and reorder columns programmatically.
/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
//package org.eclipse.swt.snippets;
/*
 * Allow user to reorder columns and reorder columns programmatically.
 * 
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 * 
 * @since 3.2
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
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.TreeColumn;
import org.eclipse.swt.widgets.TreeItem;

public class TreeTableReorderColumn {

  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new RowLayout(SWT.HORIZONTAL));
    final Tree tree = new Tree(shell, SWT.BORDER | SWT.CHECK);
    tree.setLayoutData(new RowData(-1, 300));
    tree.setHeaderVisible(true);
    TreeColumn column = new TreeColumn(tree, SWT.LEFT);
    column.setText("Column 0");
    column = new TreeColumn(tree, SWT.CENTER);
    column.setText("Column 1");
    column = new TreeColumn(tree, SWT.LEFT);
    column.setText("Column 2");
    column = new TreeColumn(tree, SWT.RIGHT);
    column.setText("Column 3");
    column = new TreeColumn(tree, SWT.CENTER);
    column.setText("Column 4");
    for (int i = 0; i < 5; i++) {
      TreeItem item = new TreeItem(tree, SWT.NONE);
      String[] text = new String[] { i + ":0", i + ":1", i + ":2", i + ":3", i + ":4" };
      item.setText(text);
      for (int j = 0; j < 5; j++) {
        TreeItem subItem = new TreeItem(item, SWT.NONE);
        text = new String[] { i + "," + j + ":0", i + "," + j + ":1", i + "," + j + ":2",
            i + "," + j + ":3", i + "," + j + ":4" };
        subItem.setText(text);
        for (int k = 0; k < 5; k++) {
          TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
          text = new String[] { i + "," + j + "," + k + ":0", i + "," + j + "," + k + ":1",
              i + "," + j + "," + k + ":2", i + "," + j + "," + k + ":3",
              i + "," + j + "," + k + ":4" };
          subsubItem.setText(text);
        }
      }
    }
    Listener listener = new Listener() {
      public void handleEvent(Event e) {
        System.out.println("Move " + e.widget);
      }
    };
    TreeColumn[] columns = tree.getColumns();
    for (int i = 0; i < columns.length; i++) {
      columns[i].setWidth(100);
      columns[i].setMoveable(true);
      columns[i].addListener(SWT.Move, listener);
    }
    Button b = new Button(shell, SWT.PUSH);
    b.setText("invert column order");
    b.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event e) {
        int[] order = tree.getColumnOrder();
        for (int i = 0; i < order.length / 2; i++) {
          int temp = order[i];
          order[i] = order[order.length - i - 1];
          order[order.length - i - 1] = temp;
        }
        tree.setColumnOrder(order);
      }
    });
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}








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