org.eclipse.buckminster.jnlp.p2.HelpLinkMessageDialog.java Source code

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Here is the source code for org.eclipse.buckminster.jnlp.p2.HelpLinkMessageDialog.java

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/*******************************************************************************
 * Copyright (c) 2006-2007, Cloudsmith Inc.
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the copyright holder
 * listed above, as the Initial Contributor under such license. The text of
 * such license is available at www.eclipse.org.
 ******************************************************************************/

package org.eclipse.buckminster.jnlp.p2;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.program.Program;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Link;
import org.eclipse.swt.widgets.Shell;

/**
 * @author Karel Brezina
 *
 */
public class HelpLinkMessageDialog extends MessageDialog {
    private String m_helpLinkTitle;
    private String m_helpLinkURL;

    public HelpLinkMessageDialog(Shell parentShell, String dialogTitle, Image dialogTitleImage,
            String dialogMessage, int dialogImageType, String[] dialogButtonLabels, int defaultIndex,
            String helpLinkTitle, String helpLinkURL) {
        super(parentShell, dialogTitle, dialogTitleImage, dialogMessage, dialogImageType, dialogButtonLabels,
                defaultIndex);

        m_helpLinkTitle = helpLinkTitle;
        m_helpLinkURL = helpLinkURL;

        if (m_helpLinkTitle == null) {
            m_helpLinkTitle = m_helpLinkURL;
        }
    }

    public static void openInformation(Shell parent, String dialogTitle, Image dialogTitleImage,
            String dialogMessage, String helpLinkTitle, String helpLinkURL) {
        MessageDialog dialog = new HelpLinkMessageDialog(parent, dialogTitle, dialogTitleImage, dialogMessage,
                INFORMATION, new String[] { IDialogConstants.OK_LABEL }, 0, helpLinkTitle, helpLinkURL);
        dialog.open();
        return;
    }

    @Override
    protected Control createDialogArea(Composite parent) {
        // create message area
        createMessageArea(parent);

        // allow subclasses to add custom controls
        new Label(parent, SWT.NULL);
        Control customArea = createCustomArea(parent);
        //If it is null create a dummy label for spacing purposes
        if (customArea == null) {
            customArea = new Label(parent, SWT.NULL);
        }
        return customArea;
    }

    @Override
    protected Control createCustomArea(Composite parent) {

        if (m_helpLinkURL == null) {
            return null;
        }

        Composite linkComposite = new Composite(parent, SWT.NONE);
        GridLayout layout = new GridLayout(2, false);
        layout.marginHeight = layout.marginWidth = 0;
        linkComposite.setLayout(layout);

        new Label(linkComposite, SWT.NONE).setText("Read more about:");

        Link helpLink = new Link(linkComposite, SWT.NONE);
        helpLink.setText("<a>" + m_helpLinkTitle + "</a>");
        helpLink.addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent e) {
                if (m_helpLinkURL != null) {
                    Program.launch(m_helpLinkURL);
                }
            }
        });

        // after start set focus to OK button not to help link
        getShell().addFocusListener(new FocusAdapter() {

            private boolean m_passFocusToOk = true;

            @Override
            public void focusGained(FocusEvent e) {
                if (m_passFocusToOk) {
                    getButton(IDialogConstants.OK_ID).setFocus();
                    m_passFocusToOk = false;
                }
            }
        });

        return null;
    }
}