org.eclipse.jface.layout.LayoutConstants Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2005, 2006 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 1.0
*/
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;
}
}