-/*
- * Copyright (C) 2007-2012 Argeo GmbH
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.argeo.eclipse.ui;
-
-import java.util.Comparator;
-
-import org.eclipse.jface.viewers.ColumnViewer;
-import org.eclipse.jface.viewers.TableViewerColumn;
-import org.eclipse.jface.viewers.Viewer;
-import org.eclipse.jface.viewers.ViewerComparator;
-import org.eclipse.swt.SWT;
-import org.eclipse.swt.events.SelectionAdapter;
-import org.eclipse.swt.events.SelectionEvent;
-
-/** Generic column viewer sorter */
-public class ColumnViewerComparator<T> extends ViewerComparator {
- private static final long serialVersionUID = -2266218906355859909L;
-
- public static final int ASC = 1;
-
- public static final int NONE = 0;
-
- public static final int DESC = -1;
-
- private int direction = 0;
-
- private TableViewerColumn column;
-
- private ColumnViewer viewer;
-
- public ColumnViewerComparator(TableViewerColumn column,
- Comparator<T> comparator) {
- super(comparator);
- this.column = column;
- this.viewer = column.getViewer();
- this.column.getColumn().addSelectionListener(new SelectionAdapter() {
- private static final long serialVersionUID = 7586796298965472189L;
-
- public void widgetSelected(SelectionEvent e) {
- if (ColumnViewerComparator.this.viewer.getComparator() != null) {
- if (ColumnViewerComparator.this.viewer.getComparator() == ColumnViewerComparator.this) {
- int tdirection = ColumnViewerComparator.this.direction;
-
- if (tdirection == ASC) {
- setSortDirection(DESC);
- } else if (tdirection == DESC) {
- setSortDirection(NONE);
- }
- } else {
- setSortDirection(ASC);
- }
- } else {
- setSortDirection(ASC);
- }
- }
- });
- }
-
- private void setSortDirection(int direction) {
- if (direction == NONE) {
- column.getColumn().getParent().setSortColumn(null);
- column.getColumn().getParent().setSortDirection(SWT.NONE);
- viewer.setComparator(null);
- } else {
- column.getColumn().getParent().setSortColumn(column.getColumn());
- this.direction = direction;
-
- if (direction == ASC) {
- column.getColumn().getParent().setSortDirection(SWT.DOWN);
- } else {
- column.getColumn().getParent().setSortDirection(SWT.UP);
- }
-
- if (viewer.getComparator() == this) {
- viewer.refresh();
- } else {
- viewer.setComparator(this);
- }
-
- }
- }
-
- @SuppressWarnings("unchecked")
- public int compare(Viewer viewer, Object e1, Object e2) {
- return direction * getComparator().compare((T) e1, (T) e2);
- }
-}