| /*=============================================================================# |
| # Copyright (c) 2012, 2020 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.internal.ecommons.emf.ui; |
| |
| import java.util.List; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.value.DecoratingObservableValue; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.core.databinding.observable.value.ValueChangeEvent; |
| import org.eclipse.core.databinding.observable.value.ValueDiff; |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.jface.databinding.viewers.IViewerObservableValue; |
| import org.eclipse.jface.viewers.AbstractTableViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.Listener; |
| |
| |
| public class TableViewerObservableValueDecorator extends DecoratingObservableValue |
| implements IViewerObservableValue, Listener { |
| |
| |
| private final List<Object> input; |
| |
| private AbstractTableViewer viewer; |
| |
| |
| /** |
| * @param decorated |
| * @param viewer |
| */ |
| public TableViewerObservableValueDecorator(final IObservableValue decorated, |
| final AbstractTableViewer viewer, final List<Object> input) { |
| super(decorated, true); |
| this.viewer= viewer; |
| this.input= input; |
| viewer.getControl().addListener(SWT.Dispose, this); |
| } |
| |
| |
| @Override |
| public void handleEvent(final Event event) { |
| if (event.type == SWT.Dispose) { |
| dispose(); |
| } |
| } |
| |
| @Override |
| public Viewer getViewer() { |
| return this.viewer; |
| } |
| |
| @Override |
| public Object getValue() { |
| return checkValue(super.getValue()); |
| } |
| |
| @Override |
| public void setValue(Object value) { |
| if (value == null) { |
| value= this.input.get(0); |
| } |
| else if (value instanceof EObject) { |
| checkInput((EObject) value); |
| } |
| super.setValue(value); |
| } |
| |
| private void checkInput(final EObject value) { |
| for (int i= 1; i < this.input.size(); i++) { |
| if (this.input.get(i) == value) { |
| return; |
| } |
| } |
| for (int i= 1; i < this.input.size(); i++) { |
| final Object item= this.input.get(i); |
| if (item instanceof EObject |
| && ((EObject) item).eClass() == value.eClass()) { |
| this.input.set(i, value); |
| this.viewer.replace(value, i); |
| return; |
| } |
| } |
| } |
| |
| private EObject checkValue(final Object value) { |
| return ((value instanceof EObject) ? (EObject) value : null); |
| } |
| |
| @Override |
| protected void handleValueChange(final ValueChangeEvent event) { |
| final ValueDiff diff= Diffs.createValueDiff( |
| checkValue(event.diff.getOldValue()), |
| checkValue(event.diff.getNewValue()) ); |
| fireValueChange(diff); |
| } |
| |
| @Override |
| public synchronized void dispose() { |
| if (this.viewer != null) { |
| final Control control= this.viewer.getControl(); |
| if (control != null && !control.isDisposed()) { |
| control.removeListener(SWT.Dispose, this); |
| } |
| this.viewer= null; |
| } |
| super.dispose(); |
| } |
| |
| } |