/* (@)JTableSelectionFun.java */
/* Copyright 2009 Sebastian Haufe
* 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
[url]http://www.apache.org/licenses/LICENSE-2.0[/url]
* 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 com.ebenius;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.DefaultTableCellRenderer;
public class JTableSelectionFun {
private interface LockedRowManager {
boolean isLocked(int row);
}
/**
* Test main method.
*
* @param args ignored
*/
public static void main(String[] args) {
final LockedRowManager lockManager = new LockedRowManager() {
public boolean isLocked(int row) {
return (row % 3) == 2;
}
};
final JTable table = new JTable(100, 3);
table.setSelectionModel(new DefaultListSelectionModel() {
@Override
public void addSelectionInterval(int index0, int index1) {
if (!checkRangeLocked(lockManager, index0, index1)) {
super.addSelectionInterval(index0, index1);
}
}
@Override
public void setSelectionInterval(int index0, int index1) {
if (!checkRangeLocked(lockManager, index0, index1)) {
super.setSelectionInterval(index0, index1);
}
}
private boolean checkRangeLocked(
final LockedRowManager lockManager,
int index0,
int index1) {
boolean locked = false;
int low = Math.min(index0, index1);
final int high = Math.max(index0, index1);
if (low > -1 && high > -1) {
for (int i = low; i <= high && !locked; i++) {
if (lockManager.isLocked(i)) {
locked = true;
}
}
}
return locked;
}
});
table.setDefaultRenderer(Object.class, new DefaultTableCellRenderer() {
@Override
public Component getTableCellRendererComponent(
JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column) {
super.getTableCellRendererComponent(table, value, isSelected,
hasFocus, row, column);
setEnabled(!lockManager.isLocked(row));
return this;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (!isEnabled()) {
final Insets ins = getInsets();
final int mid = (getHeight() + ins.top - ins.bottom) / 2;
g.setColor(Color.RED);
g.drawLine(ins.left, mid, getWidth() - ins.right, mid);
g.drawLine(ins.left, mid + 1, getWidth() - ins.right, mid + 1);
}
}
});
final JPanel contentPane = new JPanel(new BorderLayout(6, 6));
contentPane.add(new JScrollPane(table));
final JFrame f = new JFrame("Test Frame: JTableSelection"); //$NON-NLS-1$
f.setContentPane(contentPane);
f.pack();
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.setVisible(true);
}
}
