JSortTable : Grid Table « Swing Components « Java
JSortTable
package org.tn5250j.gui;
/*
JSortTable.java
Created by Claude Duguay
Copyright (c) 2002
This was taken from a Java Pro magazine article
http://www.fawcette.com/javapro/codepage.asp?loccode=jp0208
I have NOT asked for permission to use this.
*/
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Collections;
import java.util.Comparator;
import java.util.Vector;
import javax.swing.Icon;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
public class JSortTable extends JTable implements MouseListener {
protected int sortedColumnIndex = -1;
protected boolean sortedColumnAscending = true;
public JSortTable() {
this(new DefaultSortTableModel());
}
public JSortTable(int rows, int cols) {
this(new DefaultSortTableModel(rows, cols));
}
public JSortTable(Object[][] data, Object[] names) {
this(new DefaultSortTableModel(data, names));
}
public JSortTable(Vector data, Vector names) {
this(new DefaultSortTableModel(data, names));
}
public JSortTable(SortTableModel model) {
super(model);
initSortHeader();
}
public JSortTable(SortTableModel model, TableColumnModel colModel) {
super(model, colModel);
initSortHeader();
}
public JSortTable(SortTableModel model, TableColumnModel colModel,
ListSelectionModel selModel) {
super(model, colModel, selModel);
initSortHeader();
}
protected void initSortHeader() {
JTableHeader header = getTableHeader();
header.setDefaultRenderer(new SortHeaderRenderer());
header.addMouseListener(this);
}
public int getSortedColumnIndex() {
return sortedColumnIndex;
}
public boolean isSortedColumnAscending() {
return sortedColumnAscending;
}
public void mouseReleased(MouseEvent event) {
TableColumnModel colModel = getColumnModel();
int index = colModel.getColumnIndexAtX(event.getX());
int modelIndex = colModel.getColumn(index).getModelIndex();
SortTableModel model = (SortTableModel)getModel();
if (model.isSortable(modelIndex)) {
// toggle ascension, if already sorted
if (sortedColumnIndex == index) {
sortedColumnAscending = !sortedColumnAscending;
}
sortedColumnIndex = index;
model.sortColumn(modelIndex, sortedColumnAscending);
}
}
public void mousePressed(MouseEvent event) {}
public void mouseClicked(MouseEvent event) {}
public void mouseEntered(MouseEvent event) {}
public void mouseExited(MouseEvent event) {}
}
/*
DefaultSortTableModel.java
Created by Claude Duguay
Copyright (c) 2002
This was taken from a Java Pro magazine article
http://www.fawcette.com/javapro/codepage.asp?loccode=jp0208
I have NOT asked for permission to use this.
*/
class DefaultSortTableModel extends DefaultTableModel
implements SortTableModel {
public DefaultSortTableModel() {}
public DefaultSortTableModel(int rows, int cols) {
super(rows, cols);
}
public DefaultSortTableModel(Object[][] data, Object[] names) {
super(data, names);
}
public DefaultSortTableModel(Object[] names, int rows) {
super(names, rows);
}
public DefaultSortTableModel(Vector names, int rows) {
super(names, rows);
}
public DefaultSortTableModel(Vector data, Vector names) {
super(data, names);
}
public boolean isSortable(int col) {
return true;
}
public void sortColumn(int col, boolean ascending) {
Collections.sort(getDataVector(),
new ColumnComparator(col, ascending));
}
}
/*
SortTableModel.java
Created by Claude Duguay
Copyright (c) 2002
This was taken from a Java Pro magazine article
http://www.fawcette.com/javapro/codepage.asp?loccode=jp0208
I have NOT asked for permission to use this.
*/
interface SortTableModel extends TableModel {
public boolean isSortable(int col);
public void sortColumn(int col, boolean ascending);
}
/*
ColumnComparator.java
Created by Claude Duguay
Copyright (c) 2002
This was taken from a Java Pro magazine article
http://www.fawcette.com/javapro/codepage.asp?loccode=jp0208
I have NOT asked for permission to use this.
*/
class ColumnComparator implements Comparator {
protected int index;
protected boolean ascending;
public ColumnComparator(int index, boolean ascending) {
this.index = index;
this.ascending = ascending;
}
public int compare(Object one, Object two) {
if (one instanceof Vector && two instanceof Vector) {
Vector vOne = (Vector)one;
Vector vTwo = (Vector)two;
Object oOne = vOne.elementAt(index);
Object oTwo = vTwo.elementAt(index);
if (oOne instanceof Comparable && oTwo instanceof Comparable) {
Comparable cOne = (Comparable)oOne;
Comparable cTwo = (Comparable)oTwo;
if (ascending) {
return cOne.compareTo(cTwo);
}
else {
return cTwo.compareTo(cOne);
}
}
}
return 1;
}
}
/*
SortHeaderRenderer.java
Created by Claude Duguay
Copyright (c) 2002
This was taken from a Java Pro magazine article
http://www.fawcette.com/javapro/codepage.asp?loccode=jp0208
I have NOT asked for permission to use this.
*/
class SortHeaderRenderer extends DefaultTableCellRenderer {
public static Icon NONSORTED = new SortArrowIcon(SortArrowIcon.NONE);
public static Icon ASCENDING = new SortArrowIcon(SortArrowIcon.ASCENDING);
public static Icon DECENDING = new SortArrowIcon(SortArrowIcon.DECENDING);
public SortHeaderRenderer() {
setHorizontalTextPosition(LEFT);
setHorizontalAlignment(CENTER);
}
public Component getTableCellRendererComponent( JTable table,
Object value,
boolean isSelected,
boolean hasFocus, int row, int col) {
int index = -1;
boolean ascending = true;
if (table instanceof JSortTable) {
JSortTable sortTable = (JSortTable)table;
index = sortTable.getSortedColumnIndex();
ascending = sortTable.isSortedColumnAscending();
}
if (table != null) {
JTableHeader header = table.getTableHeader();
if (header != null) {
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
}
}
Icon icon = ascending ? ASCENDING : DECENDING;
setIcon(col == index ? icon : NONSORTED);
setText((value == null) ? "" : value.toString());
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return this;
}
}
/*
SortArrowIcon.java
Created by Claude Duguay
Copyright (c) 2002
This was taken from a Java Pro magazine article
http://www.fawcette.com/javapro/codepage.asp?loccode=jp0208
I have NOT asked for permission to use this.
*/
class SortArrowIcon implements Icon {
public static final int NONE = 0;
public static final int DECENDING = 1;
public static final int ASCENDING = 2;
protected int direction;
protected int width = 8;
protected int height = 8;
public SortArrowIcon(int direction) {
this.direction = direction;
}
public int getIconWidth() {
return width;
}
public int getIconHeight() {
return height;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
Color bg = c.getBackground();
Color light = bg.brighter();
Color shade = bg.darker();
int w = width;
int h = height;
int m = w / 2;
if (direction == ASCENDING) {
g.setColor(shade);
g.drawLine(x, y, x + w, y);
g.drawLine(x, y, x + m, y + h);
g.setColor(light);
g.drawLine(x + w, y, x + m, y + h);
}
if (direction == DECENDING) {
g.setColor(shade);
g.drawLine(x + m, y, x, y + h);
g.setColor(light);
g.drawLine(x, y + h, x + w, y + h);
g.drawLine(x + m, y, x + w, y + h);
}
}
}
