net.bpelunit.toolsupport.editors.formwidgets.HyperlinkField.java Source code

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Here is the source code for net.bpelunit.toolsupport.editors.formwidgets.HyperlinkField.java

Source

/**
 * This file belongs to the BPELUnit utility and Eclipse plugin set. See enclosed
 * license file for more information.
 * 
 */
package net.bpelunit.toolsupport.editors.formwidgets;

import org.eclipse.jface.preference.JFacePreferences;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.forms.widgets.Hyperlink;

/**
 * The hyperlink field is a label which behaves like a hyperlink in a HTML page being displayed in a
 * browser, i.e. it carries the hyperlink color, is underlined, and selectable.
 * 
 * @version $Id$
 * @author Philip Mayer
 * 
 */
public class HyperlinkField {

    public interface IHyperLinkFieldListener {

        public void hyperLinkActivated();
    }

    private String fText;
    private IHyperLinkFieldListener fListener;

    public HyperlinkField(String text) {
        fText = text;
    }

    public void setHyperLinkFieldListener(IHyperLinkFieldListener listener) {
        fListener = listener;
    }

    public void removeHyperLinkFieldListener() {
        fListener = null;
    }

    public Control createControl(Composite parent, int nColumns, int horizontalAlign) {
        Hyperlink link = new Hyperlink(parent, SWT.NONE);
        link.setText(fText);
        link.setUnderlined(true);
        link.setForeground(getHyperlinkText(link.getDisplay()));
        link.addMouseListener(new MouseAdapter() {

            private boolean down = false;

            @Override
            public void mouseUp(MouseEvent e) {
                if (down) {
                    if (fListener != null)
                        fListener.hyperLinkActivated();
                    down = false;
                }
            }

            @Override
            public void mouseDown(MouseEvent e) {
                down = true;
            }
        });

        GridData d = new GridData(horizontalAlign, GridData.BEGINNING, true, false);
        d.horizontalSpan = nColumns;
        link.setLayoutData(d);

        return link;
    }

    private static Color getHyperlinkText(Display display) {
        return JFaceResources.getColorRegistry().get(JFacePreferences.HYPERLINK_COLOR);
    }

}