org.openscada.ui.chart.viewer.ArchiveChannelViewer.java Source code

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Here is the source code for org.openscada.ui.chart.viewer.ArchiveChannelViewer.java

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/*
 * This file is part of the openSCADA project
 * Copyright (C) 2006-2012 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.ui.chart.viewer;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.beans.PojoObservables;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.emf.databinding.EMFObservables;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.resource.ResourceManager;
import org.openscada.ui.chart.model.ChartModel.ArchiveChannel;
import org.openscada.ui.chart.model.ChartModel.ChartPackage;
import org.openscada.ui.chart.viewer.input.ArchiveChannelInput;
import org.openscada.ui.chart.viewer.input.QueryChannelSeriesData;
import org.openscada.ui.chart.viewer.input.QuerySeriesData;

public class ArchiveChannelViewer extends AbstractObserver {
    public static final String PROP_INPUT = "input"; //$NON-NLS-1$

    private String channelName;

    private QuerySeriesData querySeriesData;

    private final ChartViewer viewer;

    private QueryChannelSeriesData data;

    private ArchiveChannelInput input;

    private XAxisViewer xAxisViewer;

    private YAxisViewer yAxisViewer;

    private final IObservableValue inputObservable;

    private final IObservableValue linePropertiesObservable;

    private final ResourceManager resourceManager;

    public ArchiveChannelViewer(final DataBindingContext dbc, final ArchiveChannel element,
            final ChartViewer viewer, final ResourceManager resourceManager,
            final ArchiveSeriesViewer archiveSeriesViewer) {
        super();

        this.viewer = viewer;

        this.resourceManager = resourceManager;

        addBinding(dbc.bindValue(PojoObservables.observeValue(this, "channelName"), //$NON-NLS-1$
                EMFObservables.observeValue(element, ChartPackage.Literals.ARCHIVE_CHANNEL__NAME)));
        addBinding(dbc.bindValue(PojoObservables.observeValue(this, "querySeriesData"), //$NON-NLS-1$
                BeansObservables.observeValue(archiveSeriesViewer, ArchiveSeriesViewer.PROP_QUERY_SERIES_DATA)));

        addBinding(dbc.bindValue(PojoObservables.observeValue(this, "XAxisViewer"), //$NON-NLS-1$
                BeansObservables.observeValue(archiveSeriesViewer, AbstractInputViewer.PROP_X_AXIS)));
        addBinding(dbc.bindValue(PojoObservables.observeValue(this, "YAxisViewer"), //$NON-NLS-1$
                BeansObservables.observeValue(archiveSeriesViewer, AbstractInputViewer.PROP_Y_AXIS)));

        this.inputObservable = BeansObservables.observeValue(this, PROP_INPUT);
        this.linePropertiesObservable = EMFObservables.observeValue(element,
                ChartPackage.Literals.ARCHIVE_CHANNEL__LINE_PROPERTIES);

        addBinding(dbc.bindValue(PojoObservables.observeDetailValue(this.inputObservable, "label", null), //$NON-NLS-1$
                EMFObservables.observeValue(element, ChartPackage.Literals.ARCHIVE_CHANNEL__LABEL)));
        addBindings(LinePropertiesBinder.bind(SWTObservables.getRealm(viewer.getChartRenderer().getDisplay()), dbc,
                this.inputObservable, this.linePropertiesObservable));
    }

    public void setChannelName(final String channelName) {
        disposeInput();

        this.channelName = channelName;

        checkCreateInput();
    }

    public String getChannelName() {
        return this.channelName;
    }

    public QuerySeriesData getQuerySeriesData() {
        return this.querySeriesData;
    }

    public void setQuerySeriesData(final QuerySeriesData querySeriesData) {
        disposeInput();

        this.querySeriesData = querySeriesData;

        checkCreateInput();
    }

    private void checkCreateInput() {
        if (this.querySeriesData != null && this.xAxisViewer != null && this.yAxisViewer != null
                && this.channelName != null) {
            this.data = new QueryChannelSeriesData(this.viewer.getRealm(), this.xAxisViewer.getAxis(),
                    this.yAxisViewer.getAxis(), this.querySeriesData, this.channelName);
            setInput(new ArchiveChannelInput(this.viewer, this.data, this.resourceManager));
        }
    }

    @Override
    public void dispose() {
        this.inputObservable.dispose();
        this.linePropertiesObservable.dispose();

        disposeInput();
        super.dispose();
    }

    private void disposeInput() {
        if (this.input != null) {
            this.input.dispose();
            setInput(null);
        }
        if (this.data != null) {
            this.data.dispose();
            this.data = null;
        }
    }

    public XAxisViewer getXAxisViewer() {
        return this.xAxisViewer;
    }

    public void setXAxisViewer(final XAxisViewer xAxisViewer) {
        disposeInput();

        this.xAxisViewer = xAxisViewer;

        checkCreateInput();
    }

    public YAxisViewer getYAxisViewer() {
        return this.yAxisViewer;
    }

    public void setYAxisViewer(final YAxisViewer yAxisViewer) {
        disposeInput();

        this.yAxisViewer = yAxisViewer;

        checkCreateInput();
    }

    public ArchiveChannelInput getInput() {
        return this.input;
    }

    public void setInput(final ArchiveChannelInput input) {
        firePropertyChange(PROP_INPUT, this.input, this.input = input);
    }
}