Java tutorial
/*---------------- FILE HEADER KALYPSO ------------------------------------------ * * This file is part of kalypso. * Copyright (C) 2004 by: * * Technical University Hamburg-Harburg (TUHH) * Institute of River and coastal engineering * Denickestrae 22 * 21073 Hamburg, Germany * http://www.tuhh.de/wb * * and * * Bjoernsen Consulting Engineers (BCE) * Maria Trost 3 * 56070 Koblenz, Germany * http://www.bjoernsen.de * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Contact: * * E-Mail: * belger@bjoernsen.de * schlienger@bjoernsen.de * v.doemming@tuhh.de * * ---------------------------------------------------------------------------*/ package org.kalypso.model.wspm.tuhh.ui.featureview; import java.util.ArrayList; import java.util.Collection; import java.util.List; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.StructuredViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Table; import org.kalypso.commons.command.ICommand; import org.kalypso.gmlschema.property.IPropertyType; import org.kalypso.model.wspm.core.gml.IProfileFeature; import org.kalypso.model.wspm.core.gml.WspmWaterBody; import org.kalypso.model.wspm.tuhh.core.gml.TuhhReach; import org.kalypso.model.wspm.tuhh.core.gml.TuhhReachProfileSegment; import org.kalypso.model.wspm.tuhh.ui.i18n.Messages; import org.kalypso.ogc.gml.featureview.control.AbstractFeatureControl; import org.kalypso.ui.editor.gmleditor.part.GMLLabelProvider; import org.kalypsodeegree.model.feature.Feature; import org.kalypsodeegree.model.feature.FeatureList; /** * @author belger * @author jung */ public class ReachSegmentFeatureControl extends AbstractFeatureControl { protected final class ChangeCheckstateAction extends Action { private final boolean m_checkState; public ChangeCheckstateAction(final String text, final boolean checkState) { super(text); m_checkState = checkState; } @Override public void run() { final IStructuredSelection selection = (IStructuredSelection) getViewer().getSelection(); changeCheckState(selection.toArray(), m_checkState); } } private CheckboxTableViewer m_linkChecklist; public ReachSegmentFeatureControl(final Feature feature, final IPropertyType pt) { super(feature, pt); } protected StructuredViewer getViewer() { return m_linkChecklist; } /** * @return Always <code>true</code> */ @Override public boolean isValid() { // can never be invalid return true; } @Override public Control createControl(final Composite parent, final int style) { m_linkChecklist = CheckboxTableViewer.newCheckList(parent, style | SWT.MULTI); m_linkChecklist.setContentProvider(new ArrayContentProvider()); m_linkChecklist.setLabelProvider(new GMLLabelProvider()); m_linkChecklist.addCheckStateListener(new ICheckStateListener() { @Override public void checkStateChanged(final CheckStateChangedEvent event) { final IProfileFeature profileFeature = (IProfileFeature) event.getElement(); final boolean checked = event.getChecked(); handleCheckStateChanged(new IProfileFeature[] { profileFeature }, checked); } }); /* Configure context menu */ final MenuManager manager = new MenuManager(); manager.add(new ChangeCheckstateAction( Messages.getString("org.kalypso.model.wspm.tuhh.ui.featureview.ReachSegmentFeatureControl.0"), //$NON-NLS-1$ true)); manager.add(new ChangeCheckstateAction( Messages.getString("org.kalypso.model.wspm.tuhh.ui.featureview.ReachSegmentFeatureControl.1"), //$NON-NLS-1$ false)); final Table table = m_linkChecklist.getTable(); table.setMenu(manager.createContextMenu(table)); updateControl(); return table; } protected void changeCheckState(final Object[] objects, final boolean check) { final Collection<IProfileFeature> toToggle = new ArrayList<>(); for (final Object object : objects) { final boolean checked = m_linkChecklist.getChecked(object); if (checked != check) { toToggle.add((IProfileFeature) object); } } final IProfileFeature[] profilesToCheck = toToggle.toArray(new IProfileFeature[toToggle.size()]); if (profilesToCheck.length > 0) { handleCheckStateChanged(profilesToCheck, check); } } @Override public void updateControl() { final Feature feature = getFeature(); if (!(feature instanceof TuhhReach)) { m_linkChecklist.setInput(null); m_linkChecklist.setCheckStateProvider(null); } else { final TuhhReach reach = (TuhhReach) feature; m_linkChecklist.setCheckStateProvider(new ReachSegmentCheckStateProvider(reach)); final WspmWaterBody waterBody = reach.getWaterBody(); if (waterBody == null) { m_linkChecklist.setInput(new Object[] {}); } else { final List<?> profiles = (List<?>) waterBody.getProperty(WspmWaterBody.MEMBER_PROFILE); m_linkChecklist.setInput(profiles); } } } protected void handleCheckStateChanged(final IProfileFeature[] profileFeatures, final boolean checked) { // add or remove profile segment according to new check-state final TuhhReach reach = (TuhhReach) getFeature(); final ICommand changeCommand = createCommand(reach, profileFeatures, checked); fireFeatureChange(changeCommand); } private ICommand createCommand(final TuhhReach reach, final IProfileFeature[] profileFeatures, final boolean checked) { if (checked) return new AddReachSegementCommand(reach, profileFeatures); else { final TuhhReachProfileSegment[] segmentsToRemove = findSegments(reach, profileFeatures); return new RemoveReachSegmentCommand(reach, segmentsToRemove); } } private TuhhReachProfileSegment[] findSegments(final TuhhReach reach, final IProfileFeature[] profileFeatures) { final Collection<TuhhReachProfileSegment> segments = new ArrayList<>(profileFeatures.length); final FeatureList segmentList = (FeatureList) reach.getProperty(TuhhReach.QNAME_MEMBER_REACHSEGMENT); for (final IProfileFeature profileFeature : profileFeatures) { final TuhhReachProfileSegment segment = findSegment(segmentList, profileFeature); if (segment != null) { segments.add(segment); } } /* HACK: we use this time here to cleanup-broken reaches as well: remove everything than cannot be here */ final WspmWaterBody segmentWater = reach.getWaterBody(); for (final Object segmentElement : segmentList) { final TuhhReachProfileSegment segment = (TuhhReachProfileSegment) segmentElement; /* Remove segments without profile and segments with a profile from the wrong water body */ /* This might happen, if the water body was duplicated */ final IProfileFeature profileMember = segment.getProfileMember(); if (profileMember == null) { segments.add(segment); } else { final WspmWaterBody water = profileMember.getWater(); if (!segmentWater.equals(water)) { segments.add(segment); } } } return segments.toArray(new TuhhReachProfileSegment[segments.size()]); } private TuhhReachProfileSegment findSegment(final FeatureList segmentList, final IProfileFeature profileFeature) { // CAUTION: this is a linear search through a list, and so a potential performance problem for (final Object segmentFeature : segmentList) { final TuhhReachProfileSegment segment = (TuhhReachProfileSegment) segmentFeature; final IProfileFeature profileMember = segment.getProfileMember(); if (profileMember != null && profileMember.equals(profileFeature)) return segment; } return null; } }