org.springsource.ide.eclipse.commons.livexp.ui.UIConstants.java Source code

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Here is the source code for org.springsource.ide.eclipse.commons.livexp.ui.UIConstants.java

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/*******************************************************************************
 * Copyright (c) 2013 Pivotal Software, Inc.
 * 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:
 *   Pivotal Software, Inc. - initial API and implementation
 *******************************************************************************/
package org.springsource.ide.eclipse.commons.livexp.ui;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.widgets.Control;

/**
 * @author Kris De Volder
 */
public class UIConstants {

    /**
     * Used as hint for the width of a field label. This makes the UI look nicer
     * as input boxes for fields tend to line up nicely.
     * <p>
     * Deprecated: use fieldLabelWidthHint() method instead to obtain a width hint that
     * adapts to dialog font dimensions.
     */
    @Deprecated
    public static final int FIELD_LABEL_WIDTH_HINT = 80;

    public static final int FIELD_TEXT_AREA_WIDTH = 250;

    public static final int DIALOG_WIDTH_HINT = 310;

    public static final int SCROLLABLE_LIST_HEIGTH = 200;

    /**
     * Computes a 'FIELD_LABEL_WIDTH_HINT' that scales based on the font metrics of
     * the 'DialogFont'. (See bug STS-3899)
     */
    public static final int fieldLabelWidthHint(Control control, int numChars) {
        Font dialogFont = JFaceResources.getDialogFont();
        GC gc = new GC(control);
        try {
            gc.setFont(dialogFont);
            return gc.getFontMetrics().getAverageCharWidth() * numChars;
        } finally {
            gc.dispose();
        }
    }

    public static int fieldLabelWidthHint(Control control) {
        return fieldLabelWidthHint(control, 15);
    }

}