org.jboss.tools.jst.css.properties.MessageCSSSection.java Source code

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Here is the source code for org.jboss.tools.jst.css.properties.MessageCSSSection.java

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/*******************************************************************************
 * Copyright (c) 2007-2009 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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
 *
 * Contributor:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/

package org.jboss.tools.jst.css.properties;

import org.eclipse.core.databinding.AggregateValidationStatus;
import org.eclipse.core.databinding.observable.value.IValueChangeListener;
import org.eclipse.core.databinding.observable.value.ValueChangeEvent;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage;
import org.jboss.tools.jst.css.dialog.tabs.BaseTabControl;

/**
 * @author Sergey Dzmitrovich
 * 
 */
public class MessageCSSSection extends AbstractCSSSection {

    private AggregateValidationStatus aggregateStatus;

    private Text messageLabel;

    private Label messageImageLabel;

    private IStatus status = Status.OK_STATUS;

    private Composite messageComposite;

    @Override
    public void createControls(Composite parent, TabbedPropertySheetPage aTabbedPropertySheetPage) {
        super.createControls(parent, aTabbedPropertySheetPage);

        aggregateStatus = new AggregateValidationStatus(getBindingContext().getValidationStatusProviders(),
                AggregateValidationStatus.MAX_SEVERITY);
        aggregateStatus.addValueChangeListener(new IValueChangeListener() {
            public void handleValueChange(ValueChangeEvent event) {

                handleStatusChanged((IStatus) event.diff.getNewValue());
            }
        });

        messageComposite = new Composite(parent, SWT.None);
        GridLayout gridLayout = new GridLayout(2, false);
        gridLayout.marginHeight = 0;
        gridLayout.verticalSpacing = 0;
        messageComposite.setLayout(gridLayout);
        messageImageLabel = new Label(messageComposite, SWT.CENTER);
        messageImageLabel.setImage(JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_ERROR));
        messageLabel = new Text(messageComposite, SWT.WRAP | SWT.READ_ONLY);
        messageComposite.setVisible(false);
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.jboss.tools.jst.css.properties.AbstractCssSection#createTabControl
     * (org.eclipse.swt.widgets.Composite)
     */
    @Override
    public BaseTabControl createSectionControl(Composite parent) {
        return null;
    }

    protected void handleStatusChanged(IStatus newStatus) {
        if (newStatus.getSeverity() != status.getSeverity()) {
            messageLabel.setText(newStatus.getMessage());
            messageComposite.setVisible(!newStatus.isOK());
            messageComposite.layout(true);
            status = newStatus;
        }

    }

}