org.openscada.ca.ui.importer.wizard.PreviewPage.java Source code

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Here is the source code for org.openscada.ca.ui.importer.wizard.PreviewPage.java

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/*
 * This file is part of the OpenSCADA project
 * Copyright (C) 2006-2010 TH4 SYSTEMS GmbH (http://th4-systems.com)
 *
 * OpenSCADA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenSCADA is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenSCADA. If not, see
 * <http://opensource.org/licenses/lgpl-3.0.html> for a copy of the LGPLv3 License.
 */

package org.openscada.ca.ui.importer.wizard;

import java.lang.reflect.InvocationTargetException;
import java.text.MessageFormat;
import java.util.Collections;
import java.util.List;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.TreeViewerColumn;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.statushandlers.StatusManager;
import org.openscada.ca.data.DiffEntry;
import org.openscada.ca.ui.importer.Activator;
import org.openscada.ca.ui.util.DiffController;

public class PreviewPage extends WizardPage {

    private final DiffController mergeController;

    private TreeViewer viewer;

    private Label statsLabel;

    public PreviewPage(final DiffController mergeController) {
        super("previewPage"); //$NON-NLS-1$
        setTitle(Messages.PreviewPage_PageTitle);
        this.mergeController = mergeController;
    }

    @Override
    public void createControl(final Composite parent) {
        final Composite wrapper = new Composite(parent, SWT.NONE);
        wrapper.setLayout(new GridLayout(1, false));

        this.viewer = new TreeViewer(wrapper, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER | SWT.VIRTUAL);
        this.viewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

        final TableLayout layout = new TableLayout();
        this.viewer.getTree().setLayout(layout);

        TreeViewerColumn col;
        col = new TreeViewerColumn(this.viewer, SWT.NONE);
        col.getColumn().setText(Messages.PreviewPage_ColFactoryText);
        layout.addColumnData(new ColumnWeightData(10));
        col.setLabelProvider(new DiffEntryLabelProvider());

        col = new TreeViewerColumn(this.viewer, SWT.NONE);
        col.getColumn().setText(Messages.PreviewPage_ColConfigurationText);
        layout.addColumnData(new ColumnWeightData(20));
        col.setLabelProvider(new DiffEntryLabelProvider());

        col = new TreeViewerColumn(this.viewer, SWT.NONE);
        col.getColumn().setText(Messages.PreviewPage_ColOperationText);
        layout.addColumnData(new ColumnWeightData(10));
        col.setLabelProvider(new DiffEntryLabelProvider());

        col = new TreeViewerColumn(this.viewer, SWT.NONE);
        col.getColumn().setText(Messages.PreviewPage_ColDataText);
        layout.addColumnData(new ColumnWeightData(20));
        col.setLabelProvider(new DiffEntryLabelProvider());

        col = new TreeViewerColumn(this.viewer, SWT.NONE);
        col.getColumn().setText(Messages.PreviewPage_ColCurrentDataText);
        layout.addColumnData(new ColumnWeightData(20));
        col.setLabelProvider(new DiffEntryLabelProvider());

        this.viewer.getTree().setHeaderVisible(true);

        this.viewer.setContentProvider(new LazyDiffEntryTreeProvider());
        this.viewer.setUseHashlookup(true);

        this.statsLabel = new Label(wrapper, SWT.NONE);
        this.statsLabel.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

        setControl(wrapper);
    }

    @Override
    public void setVisible(final boolean visible) {
        super.setVisible(visible);
        if (visible) {
            try {
                getContainer().run(false, false, new IRunnableWithProgress() {

                    @Override
                    public void run(final IProgressMonitor monitor)
                            throws InvocationTargetException, InterruptedException {
                        setMergeResult(PreviewPage.this.mergeController.merge(monitor));
                    }
                });
            } catch (final Exception e) {
                final Status status = new Status(IStatus.ERROR, Activator.PLUGIN_ID,
                        Messages.PreviewPage_StatusErrorFailedToMerge, e);
                StatusManager.getManager().handle(status);
                ErrorDialog.openError(getShell(), Messages.PreviewPage_TitleErrorFailedToMerge,
                        Messages.PreviewPage_MessageErrorFailedToMerge, status);
            }
        }
    }

    private void setMergeResult(final List<DiffEntry> merge) {
        Collections.sort(merge, new DiffEntryComparator());

        this.viewer.setInput(merge);

        this.statsLabel.setText(MessageFormat.format(Messages.PreviewPage_StatusLabel, merge.size()));
    }

}