/*******************************************************************************
 * 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
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 * Port to the D programming language:
 *     Bill Baxter
 *******************************************************************************/
module dwtsnippets.coolbar.Snippet140;

/*
 * CoolBar example snippet: drop-down a chevron menu containing hidden tool items
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import dwt.DWT;
import dwt.graphics.Point;
import dwt.graphics.Rectangle;
import dwt.widgets.Display;
import dwt.widgets.Shell;
import dwt.widgets.Menu;
import dwt.widgets.MenuItem;
import dwt.widgets.ToolBar;
import dwt.widgets.ToolItem;
import dwt.widgets.CoolBar;
import dwt.widgets.CoolItem;
import dwt.events.SelectionEvent;
import dwt.events.SelectionAdapter;
import dwt.layout.GridLayout;
import dwt.layout.GridData;

import tango.util.Convert;

static Display display;
static Shell shell;
static CoolBar coolBar;
static Menu chevronMenu = null;


void main () {
        display = new Display ();
        shell = new Shell (display);
        shell.setLayout(new GridLayout());
        coolBar = new CoolBar(shell, DWT.FLAT | DWT.BORDER);
        coolBar.setLayoutData(new GridData(GridData.FILL_BOTH));
        ToolBar toolBar = new ToolBar(coolBar, DWT.FLAT | DWT.WRAP);
        int minWidth = 0;
        for (int j = 0; j < 5; j++) {
                int width = 0;
                ToolItem item = new ToolItem(toolBar, DWT.PUSH);
                item.setText("B" ~ to!(char[])(j));
                width = item.getWidth();
                /* find the width of the widest tool */
                if (width > minWidth) minWidth = width;
        }
        CoolItem coolItem = new CoolItem(coolBar, DWT.DROP_DOWN);
        coolItem.setControl(toolBar);
        Point size = toolBar.computeSize(DWT.DEFAULT, DWT.DEFAULT);
        Point coolSize = coolItem.computeSize (size.x, size.y);
        coolItem.setMinimumSize(minWidth, coolSize.y);
        coolItem.setPreferredSize(coolSize);
        coolItem.setSize(coolSize);
        coolItem.addSelectionListener(new class() SelectionAdapter {
                public void widgetSelected(SelectionEvent event) {
                        if (event.detail == DWT.ARROW) {
                                CoolItem item = cast(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 = cast(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 != toolBounds) break;
                                          i++;
                                }

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

                                /* 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);
                                chevronMenu.setVisible (true);
                        }
                }
        });

        shell.pack();
        shell.open ();
        while (!shell.isDisposed ()) {
                if (!display.readAndDispatch ()) display.sleep ();
        }
        display.dispose ();
}