The following code changes cell border in JTable.
You may either change each cell's border or you may select several
cells and change this select regions border. This example invovles
the following files:
//Example modified from http://www.crionics.com/products/opensource/faq/swing_ex/JTableExamples2.html
/**
* @version 1.0 12/03/98
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
import javax.swing.border.*;
public class CellBorderTableExample extends JFrame {
public CellBorderTableExample() {
super( "Cell Border Example" );
final Color color = UIManager.getColor("Table.gridColor");
DefaultTableModel dm = new DefaultTableModel(12,6) {
public void setValueAt(Object obj, int row, int col) {
if (obj instanceof MyData) {
super.setValueAt(obj, row, col);
} else {
MyData myData=null;
Object oldObject = getValueAt(row, col);
if (oldObject == null) {
myData = new MyData(obj, new LinesBorder(color,0));
} else if (oldObject instanceof MyData) {
myData = (MyData)oldObject;
} else {
System.out.println("error");
return;
}
myData.setObject(obj);
super.setValueAt(myData, row, col);
}
}
};
JTable table = new JTable( dm );
table.setIntercellSpacing(new Dimension(0,0));
table.setCellSelectionEnabled(true);
table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
table.setDefaultRenderer(Object.class, new BorderCellRenderer());
JScrollPane scroll = new JScrollPane( table );
ThicknessPanel thicknessPanel = new ThicknessPanel();
Box box = new Box(BoxLayout.Y_AXIS);
box.add(thicknessPanel);
box.add(new ButtonPanel(table, thicknessPanel));
getContentPane().add(scroll, BorderLayout.CENTER);
getContentPane().add(box, BorderLayout.EAST);
}
public static void main(String[] args) {
CellBorderTableExample frame = new CellBorderTableExample();
frame.addWindowListener( new WindowAdapter() {
public void windowClosing( WindowEvent e ) {
System.exit(0);
}
});
frame.setSize( 400, 240 );
frame.setVisible(true);
}
class ThicknessPanel extends JPanel {
JComboBox[] combos;
ThicknessPanel() {
String[] str = {"top","left","bottom","right"};
int n = str.length;
setLayout(new GridLayout(n,2));
setBorder(new TitledBorder("Thickness"));
combos = new JComboBox[n];
for (int i=0;i<n;i++) {
combos[i] = new JComboBox(new Object[]{"0","1","2","3"});
add(new JLabel(str[i]));
add(combos[i]);
}
}
public Insets getThickness() {
Insets insets = new Insets(0,0,0,0);
insets.top = combos[0].getSelectedIndex();
insets.left = combos[1].getSelectedIndex();
insets.bottom = combos[2].getSelectedIndex();
insets.right = combos[3].getSelectedIndex();
return insets;
}
}
class ButtonPanel extends JPanel {
JTable table;
ThicknessPanel thicknessPanel;
Color color = UIManager.getColor("Table.gridColor");
ButtonPanel(JTable table, ThicknessPanel thicknessPanel) {
this.table = table;
this.thicknessPanel = thicknessPanel;
setLayout(new GridLayout(3,1));
setBorder(new TitledBorder("Append Lines"));
final JCheckBox oneBlock = new JCheckBox("Block");
JButton b_and = new JButton("REPLACE");
JButton b_or = new JButton("OR");
add(oneBlock);
add(b_and);
add(b_or);
b_and.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setCellBorder(true, oneBlock.isSelected());
}
});
b_or.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setCellBorder(false, oneBlock.isSelected());
}
});
}
private void setCellBorder(boolean isReplace, boolean isBlock) {
boolean isTop,isLeft,isBottom,isRight;
Insets insets = thicknessPanel.getThickness();
int[] columns = table.getSelectedColumns();
int[] rows = table.getSelectedRows();
int rowMax = rows.length;
int columnMax = columns.length;
for (int i=0;i<rowMax;i++) {
int row = rows[i];
isTop = (i == 0 )? true: false;
isBottom = (i == rowMax-1)? true: false;
for (int j=0;j<columnMax;j++) {
int column = columns[j];
isLeft = (j == 0 )? true: false;
isRight = (j == columnMax-1)? true: false;
MyData myData = (MyData)table.getValueAt(row, column);
if (myData == null) {
myData = new MyData("", new LinesBorder(color,0));
}
LinesBorder border = (LinesBorder)myData.getBorder();
if (isBlock) {
Insets tmp = new Insets(0,0,0,0);
if (isTop) tmp.top = Math.max(tmp.top ,insets.top);
if (isLeft) tmp.left = Math.max(tmp.left ,insets.left);
if (isBottom) tmp.bottom = Math.max(tmp.bottom ,insets.bottom);
if (isRight) tmp.right = Math.max(tmp.right ,insets.right);
border.append(tmp, isReplace);
} else {
border.append(insets, isReplace);
}
table.setValueAt(myData, row, column);
}
}
table.clearSelection();
table.revalidate();
table.repaint();
}
}
class MyData implements CellBorder {
private Border border;
private Object obj;
public MyData(Object obj, Border border) {
this.obj = obj;
this.border = border;
}
public void setObject(Object obj) {
this.obj = obj;
}
public String toString() {
return obj.toString();
}
// CellBorder
public void setBorder(Border border) {
this.border = border;
}
public Border getBorder() {
return border;
}
public void setBorder(Border border, int row, int col) {}
public Border getBorder(int row, int col) { return null; }
}
}
