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.ui.rrm.internal.map.editRelation; import org.apache.commons.lang3.StringUtils; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.beans.BeansObservables; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.databinding.observable.value.IValueChangeListener; import org.eclipse.core.databinding.observable.value.ValueChangeEvent; import org.eclipse.jface.databinding.viewers.IViewerObservableValue; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.LabelProvider; 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.Label; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.ScrolledForm; import org.kalypso.contribs.eclipse.swt.widgets.ControlUtils; import org.kalypso.gmlschema.feature.IFeatureType; import org.kalypso.ui.rrm.internal.i18n.Messages; /** * @author Gernot Belger */ public class EditRelationViewer extends Composite { private final DataBindingContext m_binding; private final EditRelationData m_data; private ScrolledForm m_radioControl; private final FormToolkit m_toolkit; public EditRelationViewer(final Composite parent, final FormToolkit toolkit, final EditRelationData data) { super(parent, SWT.NONE); m_toolkit = toolkit; m_data = data; toolkit.adapt(this); GridLayoutFactory.swtDefaults().numColumns(2).applyTo(this); m_binding = new DataBindingContext(); createModeCombo(this, toolkit); createTree(this, toolkit); final IObservableValue inputValue = BeansObservables.observeValue(data, EditRelationData.PROPERTY_INPUT); inputValue.addValueChangeListener(new IValueChangeListener() { @Override public void handleValueChange(final ValueChangeEvent event) { updateControl(); } }); updateControl(); } private void createTree(final Composite parent, final FormToolkit toolkit) { m_radioControl = toolkit.createScrolledForm(parent); m_radioControl.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1)); m_radioControl.getBody().setLayout(new GridLayout()); } private void createModeCombo(final Composite parent, final FormToolkit toolkit) { toolkit.createLabel(parent, Messages.getString("EditRelationViewer_0")); //$NON-NLS-1$ final ComboViewer viewer = new ComboViewer(parent, SWT.READ_ONLY | SWT.DROP_DOWN); final Control control = viewer.getControl(); control.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); toolkit.adapt(control, true, true); viewer.setLabelProvider(new LabelProvider()); viewer.setContentProvider(new ArrayContentProvider()); viewer.setInput(EditRelationMode.values()); final IViewerObservableValue target = ViewersObservables.observeSinglePostSelection(viewer); final IObservableValue model = BeansObservables.observeValue(m_data, EditRelationData.PROPERTY_MODIFICATION_MODE); m_binding.bindValue(target, model); } protected void updateControl() { final EditRelationData data = m_data; final EditRelationInput input = data.getInput(); final Composite body = m_radioControl.getBody(); ControlUtils.disposeChildren(body); if (input == null) return; final IEditRelationType[] elements = input.getElements(); IFeatureType lastSourceType = null; for (final IEditRelationType relation : elements) { /* Separator between different source types */ final IFeatureType sourceType = relation.getSourceType(); if (lastSourceType != null && sourceType != lastSourceType) { final Label separator = m_toolkit.createLabel(body, StringUtils.EMPTY, SWT.SEPARATOR | SWT.HORIZONTAL); separator.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); } final Button button = m_toolkit.createButton(body, relation.toString(), SWT.RADIO); if (relation == elements[0]) { button.setSelection(true); data.setRelation(relation); } button.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { handleRelationSelection(relation); } @Override public void widgetDefaultSelected(final SelectionEvent e) { handleRelationSelection(relation); } }); lastSourceType = sourceType; } m_radioControl.reflow(true); } protected void handleRelationSelection(final IEditRelationType relation) { m_data.setRelation(relation); m_data.recalculateAllowedFeatures(); } }