org.eclipse.scada.ide.server.test.NgpExportPage.java Source code

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Here is the source code for org.eclipse.scada.ide.server.test.NgpExportPage.java

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/*******************************************************************************
 * Copyright (c) 2014 IBH SYSTEMS GmbH 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:
 *     IBH SYSTEMS GmbH - initial API and implementation
 *******************************************************************************/
package org.eclipse.scada.ide.server.test;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.databinding.Binding;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.observable.value.WritableValue;
import org.eclipse.jface.databinding.fieldassist.ControlDecorationSupport;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.databinding.wizard.WizardPageSupport;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.scada.core.ConnectionInformation;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Spinner;

public class NgpExportPage extends WizardPage {
    private DataBindingContext dbc;

    public NgpExportPage() {
        super("ngpExportPage", "NGP Export", null);
    }

    private final Set<Control> controls = new HashSet<>();

    private Button enable;

    private final WritableValue/*Integer*/ portValue = new WritableValue(2199, Integer.class);

    @Override
    public void createControl(final Composite parent) {
        setTitle("Select NGP Export parameters");
        setDescription("Chose the NGP protocol parameters");

        this.dbc = new DataBindingContext();

        WizardPageSupport.create(this, this.dbc);

        final Composite wrapper = new Composite(parent, SWT.NONE);
        setControl(wrapper);

        wrapper.setLayout(new GridLayout(1, false));

        this.enable = new Button(wrapper, SWT.CHECK);
        this.enable.setText("Enable NGP exporter");
        this.enable.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1));
        this.enable.setSelection(true);
        this.enable.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(final SelectionEvent e) {
                updateEnablement();
            }
        });

        final Group group = new Group(wrapper, SWT.SHADOW_ETCHED_IN);
        group.setText("TCP");
        group.setLayout(new GridLayout(2, false));

        Label l;

        l = new Label(group, SWT.NONE);
        l.setText("TCP Port:");

        final Spinner portSpinner = new Spinner(group, SWT.BORDER);
        this.controls.add(portSpinner);
        portSpinner.setIncrement(1);
        portSpinner.setMinimum(1);
        portSpinner.setMaximum(Short.MAX_VALUE - 1);
        portSpinner.setPageIncrement(10);
        portSpinner.setSelection(2199);
        portSpinner.setLayoutData(withGap());

        Binding b;

        b = this.dbc.bindValue(SWTObservables.observeSelection(portSpinner), this.portValue,
                new UpdateValueStrategy().setAfterConvertValidator(new PortValidator()), null);
        ControlDecorationSupport.create(b, SWT.LEFT);

        Dialog.applyDialogFont(wrapper);
    }

    protected GridData withGap() {
        final GridData result = new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false);
        result.horizontalIndent = 10;
        return result;
    }

    protected void updateEnablement() {
        final boolean state = this.enable.getSelection();

        for (final Control c : this.controls) {
            c.setEnabled(state);
        }
    }

    @Override
    public void dispose() {
        this.dbc.dispose();
        super.dispose();
    }

    public ConnectionInformation getConnectionInformation() {
        if (!this.enable.getSelection()) {
            return null;
        }

        final Integer port = getPort();
        if (port == null) {
            return null;
        }

        return ConnectionInformation.fromURI(String.format("da:ngp://0.0.0.0:%s", port));
    }

    private Integer getPort() {
        final Object v = this.portValue.getValue();
        if (v instanceof Number) {
            return ((Number) v).intValue();
        }
        return null;
    }

}