My JCheckBox "check all" header column works in that if I check the box, all checkboxes in this column become checked. I want to make it so that if you check the checkbox header so that all the boxes in the column become checked, uncheck one of the checkboxes in the column after will uncheck the checkbox header.
public class TablePanel extends javax.swing.JPanel {
public TablePanel() {
initComponents();
populateStringArrays(); //populate string arrays that will populate my table
table.setModel(tableModel);
table.getTableHeader().setReorderingAllowed(false);
setWidthOfTable();
loadTable(); //loads table with my array
table.getColumnModel().getColumn(5).setHeaderRenderer(new BoxRenderer(new MyItemListener()));
}
public class BoxRenderer extends JCheckBox implements TableCellRenderer, MouseListener{
String columnTitle = "Rings";
protected BoxRenderer rendererComponent;
int column;
boolean mousePressed = false;
public BoxRenderer(ItemListener listener){
rendererComponent = this;
rendererComponent.addItemListener(listener);
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
if(table != null){
JTableHeader header = table.getTableHeader();
if(header != null){
rendererComponent.setForeground(header.getForeground());
rendererComponent.setBackground(header.getBackground());
rendererComponent.setFont(header.getFont());
Border border = header.getBorder();
header.setBorder(BorderFactory.createRaisedBevelBorder());
rendererComponent.setHorizontalTextPosition(SwingConstants.LEADING);
rendererComponent.setHorizontalAlignment(CENTER);
header.addMouseListener(rendererComponent);
}
}
setColumn(column);
rendererComponent.setText(columnTitle);
return rendererComponent;
}
protected void setColumn(int column) {
this.column = column;
}
public int getColumn() {
return column;
}
protected void handleClickEvent(MouseEvent e) {
if (mousePressed) {
mousePressed=false;
JTableHeader header = (JTableHeader)(e.getSource());
JTable tableView = header.getTable();
TableColumnModel columnModel = tableView.getColumnModel();
int viewColumn = columnModel.getColumnIndexAtX(e.getX());
int column = tableView.convertColumnIndexToModel(viewColumn);
if (viewColumn == this.column && e.getClickCount() == 1 && column != -1) {
doClick();
}
}
}
public void mouseClicked(MouseEvent e) {
((JTableHeader)e.getSource()).repaint();
}
public void mousePressed(MouseEvent e) {
mousePressed = true;
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
}
class MyItemListener implements ItemListener{
@Override
public void itemStateChanged(ItemEvent e) {
Object source = e.getSource();
if (source instanceof AbstractButton == false){
return;}
boolean checked = e.getStateChange() == ItemEvent.SELECTED;
System.out.println("Boolean checked = " + checked);
if(checked == true){
checkAll();
}else{
uncheckAll();
}
}
}
private void checkAll(){
for(int i=0; i<tableRecordArrayList.size(); i++){
table.getModel().setValueAt(true, i, 5);
}
}
private void uncheckAll(){
for(int i=0; i<tableRecordArrayList.size(); i++){
table.getModel().setValueAt(false, i, 5);
}
}
class TableModel extends javax.swing.table.AbstractTableModel{
/**Constructor**/
@Override
public int getRowCount() {
return tableRecordArrayList.size();
}
@Override
public int getColumnCount() {
return 6;
}
/**refresh for changes**/
public void refreshTable(){
fireTableDataChanged();
}
@Override
public Object getValueAt(int row, int column) {
TableRecord record = tableRecordArrayList.get(row);
switch(column){
case 0:
return record.firstName;
case 1:
return record.middleName;
case 2:
return record.lastName;
case 3:
return record.age;
case 4:
return record.height;
case 5:
return record.ring;
}
return "N/A";
}
@Override
public String getColumnName(int column){
/**set the title of the columns of the table**/
switch(column){
case 0:
return "First Name";
case 1:
return "Middle Name";
case 2:
return "Last Name";
case 3:
return "Age";
case 4:
return "Height(cm)";
case 5:
return "Has Championship Ring";
}
return "N/A";
}
/**turn column into checkboxes**/
@Override
public Class<?> getColumnClass(int column){
if(column == 5){
return Boolean.class;
}
return String.class;
}
@Override
public boolean isCellEditable(int row, int column){
return column == 5;
}
@Override
public void setValueAt(Object avalue, int row, int column){
TableRecord record;
Boolean v;
switch(column){
case 5:
record = tableRecordArrayList.get(row);
v = (Boolean) avalue;
record.ring = v;
fireTableCellUpdated(row,1);
printArrayList();
fireTableDataChanged();
break;
}
}
}
}
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https://coderanch.com/t/700630/java/uncheck-JCheckBox-header-columns#3288215
I want to make it so that if you check the checkbox header so that all the boxes in the column become checked, uncheck one of the checkboxes in the column after will uncheck the checkbox header.
Add a TableModelListener to the TableModel.
When the TableModelEvent is generated you can check if the data was changed in your column containing the checkbox and then reset the header checkbox when required.
Check out: JTable -> TableModeListener for a basic example of using a TableModelListener.