content: /*
   * Copyright (c) 2019 abc123lzf <abc123lzf@126.com>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  package com.lzf.flyingsocks.client.gui.swt;
  
  /**
   * @author lzf abc123lzf@126.com
   * @since 2021/1/25 18:24
   */
  import org.eclipse.swt.SWT;
  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.Text;
  import org.eclipse.swt.widgets.Tree;
  import org.eclipse.swt.widgets.TreeItem;
  
  public class TreeDemo {
  
      public static void main(String[] args) {
          Display display = new Display();
          Shell shell = new Shell(display);
          shell.setText("Tree Example");
  
          final Text text = new Text(shell, SWT.BORDER);
          text.setBounds(0, 270, 290, 25);
  
          final Tree tree = new Tree(shell, SWT.BORDER | SWT.V_SCROLL
                  | SWT.H_SCROLL);
          tree.setSize(290, 260);
          shell.setSize(300, 330);
  
          for (int loopIndex0 = 0; loopIndex0 < 10; loopIndex0++) {
              TreeItem treeItem0 = new TreeItem(tree, 0);
              treeItem0.setText("Level 0 Item " + loopIndex0);
              for (int loopIndex1 = 0; loopIndex1 < 10; loopIndex1++) {
                  TreeItem treeItem1 = new TreeItem(treeItem0, 0);
                  treeItem1.setText("Level 1 Item " + loopIndex1);
                  for (int loopIndex2 = 0; loopIndex2 < 10; loopIndex2++) {
                      TreeItem treeItem2 = new TreeItem(treeItem1, 0);
                      treeItem2.setText("Level 2 Item " + loopIndex2);
                  }
              }
          }
  
          tree.addListener(SWT.Selection, new Listener() {
              public void handleEvent(Event event) {
                  if (event.detail == SWT.CHECK) {
                      text.setText(event.item + " was checked.");
                  } else {
                      text.setText(event.item + " was selected");
                  }
              }
          });
  
          shell.open();
          while (!shell.isDisposed()) {
              if (!display.readAndDispatch())
                  display.sleep();
          }
          display.dispose();
      }
  }