CoolBar: drop-down a chevron menu containing hidden tool items : CoolBar « SWT « Java Tutorial

CoolBar: drop-down a chevron menu containing hidden tool items
 * Copyright (c) 2000, 2004 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
 * Contributors:
 *     IBM Corporation - initial API and implementation

 * CoolBar example snippet: drop-down a chevron menu containing hidden tool items
 * For a list of all SWT example snippets see
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.CoolBar;
import org.eclipse.swt.widgets.CoolItem;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;

public class ChevronMenuHiddenToolItems {
  static Display display;

  static Shell shell;

  static CoolBar coolBar;

  static Menu chevronMenu = null;

  public static void main(String[] args) {
    display = new Display();
    shell = new Shell(display);
    shell.setLayout(new GridLayout());
    coolBar = new CoolBar(shell, SWT.FLAT | SWT.BORDER);
    coolBar.setLayoutData(new GridData(GridData.FILL_BOTH));
    ToolBar toolBar = new ToolBar(coolBar, SWT.FLAT | SWT.WRAP);
    int minWidth = 0;
    for (int j = 0; j < 5; j++) {
      int width = 0;
      ToolItem item = new ToolItem(toolBar, SWT.PUSH);
      item.setText("B" + j);
      width = item.getWidth();
      /* find the width of the widest tool */
      if (width > minWidth)
        minWidth = width;
    CoolItem coolItem = new CoolItem(coolBar, SWT.DROP_DOWN);
    Point size = toolBar.computeSize(SWT.DEFAULT, SWT.DEFAULT);
    Point coolSize = coolItem.computeSize(size.x, size.y);
    coolItem.setMinimumSize(minWidth, coolSize.y);
    coolItem.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        if (event.detail == SWT.ARROW) {
          CoolItem item = (CoolItem) event.widget;
          Rectangle itemBounds = item.getBounds();
          Point pt = coolBar.toDisplay(new Point(itemBounds.x, itemBounds.y));
          itemBounds.x = pt.x;
          itemBounds.y = pt.y;
          ToolBar bar = (ToolBar) item.getControl();
          ToolItem[] tools = bar.getItems();

          int i = 0;
          while (i < tools.length) {
            Rectangle toolBounds = tools[i].getBounds();
            pt = bar.toDisplay(new Point(toolBounds.x, toolBounds.y));
            toolBounds.x = pt.x;
            toolBounds.y = pt.y;

             * Figure out the visible portion of the tool by looking at the
             * intersection of the tool bounds with the cool item bounds.
            Rectangle intersection = itemBounds.intersection(toolBounds);

             * If the tool is not completely within the cool item bounds, then
             * it is partially hidden, and all remaining tools are completely
             * hidden.
            if (!intersection.equals(toolBounds))

          /* Create a menu with items for each of the completely hidden buttons. */
          if (chevronMenu != null)
          chevronMenu = new Menu(coolBar);
          for (int j = i; j < tools.length; j++) {
            MenuItem menuItem = new MenuItem(chevronMenu, SWT.PUSH);

          /* Drop down the menu below the chevron, with the left edges aligned. */
          pt = coolBar.toDisplay(new Point(event.x, event.y));
          chevronMenu.setLocation(pt.x, pt.y);

    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())

17.66.1.Creating Coolbars
17.66.2.Add ToolBar to CoolBarAdd ToolBar to CoolBar
17.66.3.Add Button and Combo to a CoolBarAdd Button and Combo to a CoolBar
17.66.4.Create a coolbar (relayout when resized)Create a coolbar (relayout when resized)
17.66.5.CoolBar: drop-down a chevron menu containing hidden tool itemsCoolBar: drop-down a chevron menu containing hidden tool items