| /******************************************************************************* |
| * Copyright (c) 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.jface.layout; |
| |
| import org.eclipse.jface.dialogs.Dialog; |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.jface.resource.JFaceResources; |
| import org.eclipse.swt.graphics.FontMetrics; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.widgets.Display; |
| |
| /** |
| * Contains various layout constants |
| * |
| * @since 3.2 |
| */ |
| public final class LayoutConstants { |
| private static Point dialogMargins = null; |
| private static Point dialogSpacing = null; |
| private static Point minButtonSize = null; |
| |
| private static void initializeConstants() { |
| if (dialogMargins != null) { |
| return; |
| } |
| |
| GC gc = new GC(Display.getCurrent()); |
| gc.setFont(JFaceResources.getDialogFont()); |
| FontMetrics fontMetrics = gc.getFontMetrics(); |
| |
| dialogMargins = new Point(Dialog.convertHorizontalDLUsToPixels(fontMetrics, IDialogConstants.HORIZONTAL_MARGIN), |
| Dialog.convertVerticalDLUsToPixels(fontMetrics, IDialogConstants.VERTICAL_MARGIN)); |
| |
| dialogSpacing = new Point(Dialog.convertHorizontalDLUsToPixels(fontMetrics, IDialogConstants.HORIZONTAL_SPACING), |
| Dialog.convertVerticalDLUsToPixels(fontMetrics, IDialogConstants.VERTICAL_SPACING)); |
| |
| minButtonSize = new Point(Dialog.convertHorizontalDLUsToPixels(fontMetrics, IDialogConstants.BUTTON_WIDTH), 0); |
| |
| gc.dispose(); |
| } |
| |
| /** |
| * Returns the default dialog margins, in pixels |
| * |
| * @return the default dialog margins, in pixels |
| */ |
| public static final Point getMargins() { |
| initializeConstants(); |
| return dialogMargins; |
| } |
| |
| /** |
| * Returns the default dialog spacing, in pixels |
| * |
| * @return the default dialog spacing, in pixels |
| */ |
| public static final Point getSpacing() { |
| initializeConstants(); |
| return dialogSpacing; |
| } |
| |
| /** |
| * Returns the default minimum button size, in pixels |
| * |
| * @return the default minimum button size, in pixels |
| */ |
| public static final Point getMinButtonSize() { |
| initializeConstants(); |
| return minButtonSize; |
| } |
| } |