Mega Code Archive
Sort table column in two direction with custom Comparator
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/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation and others. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors: IBM Corporation - initial API and implementation
******************************************************************************/
// package org.eclipse.swt.snippets;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Random;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
/*
* Show a sort indicator in the column header
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.2
*/
public class TableSortTwoDirection {
public static void main(String[] args) {
// initialize data with keys and random values
int size = 100;
Random random = new Random();
final int[][] data = new int[size][];
for (int i = 0; i < data.length; i++) {
data[i] = new int[] { i, random.nextInt() };
}
// create a virtual table to display data
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.VIRTUAL);
table.setHeaderVisible(true);
table.setLinesVisible(true);
table.setItemCount(size);
final TableColumn column1 = new TableColumn(table, SWT.NONE);
column1.setText("Key");
column1.setWidth(200);
final TableColumn column2 = new TableColumn(table, SWT.NONE);
column2.setText("Value");
column2.setWidth(200);
table.addListener(SWT.SetData, new Listener() {
public void handleEvent(Event e) {
TableItem item = (TableItem) e.item;
int index = table.indexOf(item);
int[] datum = data[index];
item.setText(new String[] { Integer.toString(datum[0]), Integer.toString(datum[1]) });
}
});
// Add sort indicator and sort data when column selected
Listener sortListener = new Listener() {
public void handleEvent(Event e) {
// determine new sort column and direction
TableColumn sortColumn = table.getSortColumn();
TableColumn currentColumn = (TableColumn) e.widget;
int dir = table.getSortDirection();
if (sortColumn == currentColumn) {
dir = dir == SWT.UP ? SWT.DOWN : SWT.UP;
} else {
table.setSortColumn(currentColumn);
dir = SWT.UP;
}
// sort the data based on column and direction
final int index = currentColumn == column1 ? 0 : 1;
final int direction = dir;
Arrays.sort(data, new Comparator() {
public int compare(Object arg0, Object arg1) {
int[] a = (int[]) arg0;
int[] b = (int[]) arg1;
if (a[index] == b[index])
return 0;
if (direction == SWT.UP) {
return a[index] < b[index] ? -1 : 1;
}
return a[index] < b[index] ? 1 : -1;
}
});
// update data displayed in table
table.setSortDirection(dir);
table.clearAll();
}
};
column1.addListener(SWT.Selection, sortListener);
column2.addListener(SWT.Selection, sortListener);
table.setSortColumn(column1);
table.setSortDirection(SWT.UP);
shell.setSize(shell.computeSize(SWT.DEFAULT, SWT.DEFAULT).x, 300);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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