| /******************************************************************************* |
| * Copyright (c) 2008 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: |
| * Kentarou FUKUDA - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.actf.model.ui.util; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| |
| /** |
| * Utility class to obtain scroll bar size |
| */ |
| public class ScrollBarSizeUtil { |
| private static int HORIZONTALBAR_HEIGHT = 15; |
| private static int VERTICALBAR_WIDTH = 15; |
| private static boolean isInit = false; |
| |
| private static void init() { |
| // to avoid to use swt.internal |
| if (!isInit) { |
| try { |
| Display display = Display.getCurrent(); |
| if (null != display) { |
| Shell shell = new Shell(display); |
| shell.setBounds(0, 0, 1, 1); |
| Composite composite = new Composite(shell, SWT.V_SCROLL |
| | SWT.H_SCROLL); |
| // shell.open(); |
| HORIZONTALBAR_HEIGHT = composite.getHorizontalBar() |
| .getSize().y; |
| VERTICALBAR_WIDTH = composite.getVerticalBar().getSize().x; |
| composite.dispose(); |
| shell.dispose(); |
| |
| if (HORIZONTALBAR_HEIGHT < 0) { |
| HORIZONTALBAR_HEIGHT = 15; |
| } |
| if (VERTICALBAR_WIDTH < 0) { |
| VERTICALBAR_WIDTH = 15; |
| } |
| |
| isInit = true; |
| } |
| } catch (Exception e) { |
| } |
| } |
| } |
| |
| /** |
| * Get height of horizontal scroll bar |
| * |
| * @return height of horizontal scroll bar |
| */ |
| public static int getHorizontalBarHeight() { |
| init(); |
| return HORIZONTALBAR_HEIGHT; |
| } |
| |
| /** |
| * Get width of vertical scroll bar |
| * |
| * @return width of vertical scroll bar |
| */ |
| public static int getVerticalBarWidth() { |
| init(); |
| return VERTICALBAR_WIDTH; |
| } |
| |
| } |