org.eclipse.ltk.internal.ui.refactoring.util.SWTUtil.java Source code

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Here is the source code for org.eclipse.ltk.internal.ui.refactoring.util.SWTUtil.java

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/*******************************************************************************
 * Copyright (c) 2005, 2010 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.ltk.internal.ui.refactoring.util;

import org.eclipse.swt.SWT;
import org.eclipse.swt.accessibility.ACC;
import org.eclipse.swt.accessibility.AccessibleAdapter;
import org.eclipse.swt.accessibility.AccessibleEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Control;

import org.eclipse.core.runtime.Assert;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.layout.PixelConverter;
import org.eclipse.jface.resource.JFaceResources;

/**
 * Utility class for swt-related functions.
 *
 * @since 3.2
 */
public final class SWTUtil {

    public static int getButtonWidthHint(Button button) {
        button.setFont(JFaceResources.getDialogFont());
        return Math.max(new PixelConverter(button).convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH),
                button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
    }

    public static void setButtonDimensionHint(Button button) {
        Assert.isNotNull(button);
        Object data = button.getLayoutData();
        if (data instanceof GridData) {
            ((GridData) data).widthHint = getButtonWidthHint(button);
            ((GridData) data).horizontalAlignment = GridData.FILL;
        }
    }

    /**
     * Adds an accessibility listener returning the given fixed name.
     *
     * @param control the control to add the accessibility support to
     * @param text the name
     * 
     * @since 3.5.100
     */
    public static void setAccessibilityText(Control control, final String text) {
        control.getAccessible().addAccessibleListener(new AccessibleAdapter() {
            public void getName(AccessibleEvent e) {
                if (e.childID == ACC.CHILDID_SELF) {
                    e.result = text;
                }
            }
        });
    }

    private SWTUtil() {
        // Not for instantiation
    }
}