Java tutorial
/* * This file is part of the openSCADA project * Copyright (C) 2011-2012 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 java.util.HashMap; import java.util.Map; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.beans.BeansObservables; import org.eclipse.core.databinding.observable.list.IListChangeListener; import org.eclipse.core.databinding.observable.list.ListChangeEvent; import org.eclipse.core.databinding.observable.list.ListDiffVisitor; import org.eclipse.core.databinding.observable.list.WritableList; 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.hd.ui.connection.data.Item.Type; import org.openscada.ui.chart.model.ChartModel.ArchiveChannel; import org.openscada.ui.chart.model.ChartModel.ArchiveSeries; import org.openscada.ui.chart.model.ChartModel.ChartPackage; import org.openscada.ui.chart.model.ChartModel.IdItem; import org.openscada.ui.chart.model.ChartModel.Item; import org.openscada.ui.chart.model.ChartModel.UriItem; import org.openscada.ui.chart.model.ChartModel.XAxis; import org.openscada.ui.chart.model.ChartModel.YAxis; import org.openscada.ui.chart.viewer.input.ArchiveInput; import org.openscada.ui.chart.viewer.input.ChartInput; import org.openscada.ui.chart.viewer.input.QuerySeriesData; public class ArchiveSeriesViewer extends AbstractItemInputViewer { public static final String PROP_INPUT = "input"; //$NON-NLS-1$ public static final String PROP_QUERY_SERIES_DATA = "querySeriesData"; //$NON-NLS-1$ private final WritableList channels = new WritableList(); private final Map<ArchiveChannel, ArchiveChannelViewer> viewerMap = new HashMap<ArchiveChannel, ArchiveChannelViewer>(); private final DataBindingContext dbc; private QuerySeriesData querySeriesData; private final IObservableValue inputObservable; private final IObservableValue linePropertiesObservable; private ArchiveInput input; public ArchiveSeriesViewer(final DataBindingContext dbc, final ArchiveSeries element, final ChartViewer viewer, final ResourceManager resourceManager, final AxisLocator<XAxis, XAxisViewer> xLocator, final AxisLocator<YAxis, YAxisViewer> yLocator) { super(dbc, element, viewer, resourceManager, xLocator, yLocator); this.dbc = dbc; this.channels.addListChangeListener(new IListChangeListener() { @Override public void handleListChange(final ListChangeEvent event) { event.diff.accept(new ListDiffVisitor() { @Override public void handleRemove(final int index, final Object element) { handleRemoveChannel((ArchiveChannel) element); } @Override public void handleAdd(final int index, final Object element) { handleAddChannel((ArchiveChannel) element); } }); } }); addBinding(dbc.bindList(this.channels, EMFObservables.observeList(element, ChartPackage.Literals.ARCHIVE_SERIES__CHANNELS))); this.inputObservable = BeansObservables.observeValue(this, PROP_INPUT); this.linePropertiesObservable = EMFObservables.observeValue(element, ChartPackage.Literals.ARCHIVE_SERIES__LINE_PROPERTIES); addBindings(LinePropertiesBinder.bind(SWTObservables.getRealm(viewer.getChartRenderer().getDisplay()), dbc, this.inputObservable, this.linePropertiesObservable)); setInputObserable(this.inputObservable); } protected void handleAddChannel(final ArchiveChannel channel) { final ArchiveChannelViewer viewer = new ArchiveChannelViewer(this.dbc, channel, this.viewer, this.resourceManager, this); final ArchiveChannelViewer oldViewer = this.viewerMap.put(channel, viewer); if (oldViewer != null) { oldViewer.dispose(); } } protected void handleRemoveChannel(final ArchiveChannel channel) { final ArchiveChannelViewer viewer = this.viewerMap.remove(channel); if (viewer != null) { viewer.dispose(); } } @Override public void dispose() { super.dispose(); this.inputObservable.dispose(); this.linePropertiesObservable.dispose(); this.channels.dispose(); } @Override protected void checkCreateInput() { if (this.item != null && this.xAxis != null && this.yAxis != null) { final org.openscada.hd.ui.connection.data.Item item = makeItem(this.item); if (item == null) { return; } setQuerySeriesData( new QuerySeriesData(item, this.viewer.getRealm(), this.xAxis.getAxis(), this.yAxis.getAxis())); final ArchiveInput input = new ArchiveInput(item, this.viewer, this.querySeriesData, this.resourceManager); this.viewer.addInput(input); setInput(input); } } private void setInput(final ArchiveInput input) { firePropertyChange(PROP_INPUT, this.input, this.input = input); } public ArchiveInput getInput() { return this.input; } private org.openscada.hd.ui.connection.data.Item makeItem(final Item item) { if (item instanceof IdItem) { return new org.openscada.hd.ui.connection.data.Item(((IdItem) item).getConnectionId(), item.getItemId(), Type.ID); } else if (item instanceof UriItem) { return new org.openscada.hd.ui.connection.data.Item(((UriItem) item).getConnectionUri(), item.getItemId(), Type.URI); } else { return null; } } @Override protected void disposeInput() { if (this.input != null) { this.viewer.removeInput(this.input); this.input.dispose(); setInput(null); } if (this.querySeriesData != null) { this.querySeriesData.dispose(); setQuerySeriesData(null); } } @Override public boolean provides(final ChartInput input) { return this.input == input; } public QuerySeriesData getQuerySeriesData() { return this.querySeriesData; } public void setQuerySeriesData(final QuerySeriesData querySeriesData) { firePropertyChange(PROP_QUERY_SERIES_DATA, querySeriesData, this.querySeriesData = querySeriesData); } }