Good afternoon, I would like to know how to add a custom Header in a table with more than one combined column, etc.
JTableHeader Netbeans [closed]
0
1 answer
2
This is the answer to the question. I have already been able to achieve what I want.
Here are the steps:
Creation of the ColumnGroup class
public class ColumnGroup {
protected TableCellRenderer renderer;
protected Vector v;
protected String text;
protected int margin=0;
public ColumnGroup(String text) {
this(null,text);
}
public ColumnGroup(TableCellRenderer renderer,String text) {
if (renderer == null) {
this.renderer = new DefaultTableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
JTableHeader header = table.getTableHeader();
if (header != null) {
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
}
setHorizontalAlignment(JLabel.CENTER);
setText((value == null) ? "" : value.toString());
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return this;
}
};
} else {
this.renderer = renderer;
}
this.text = text;
v = new Vector();
}
/**
* @param obj TableColumn or ColumnGroup
*/
public void add(Object obj) {
if (obj == null) { return; }
v.addElement(obj);
}
/**
* @param c TableColumn
* @param v ColumnGroups
*/
public Vector getColumnGroups(TableColumn c, Vector g) {
g.addElement(this);
if (v.contains(c)) return g;
Enumeration e = v.elements();
while (e.hasMoreElements()) {
Object obj = e.nextElement();
if (obj instanceof ColumnGroup) {
Vector groups =
(Vector)((ColumnGroup)obj).getColumnGroups(c,(Vector)g.clone());
if (groups != null) return groups;
}
}
return null;
}
public TableCellRenderer getHeaderRenderer() {
return renderer;
}
public void setHeaderRenderer(TableCellRenderer renderer) {
if (renderer != null) {
this.renderer = renderer;
}
}
public Object getHeaderValue() {
return text;
}
public Dimension getSize(JTable table) {
Component comp = renderer.getTableCellRendererComponent(
table, getHeaderValue(), false, false,-1, -1);
int height = comp.getPreferredSize().height;
int width = 0;
Enumeration e = v.elements();
while (e.hasMoreElements()) {
Object obj = e.nextElement();
if (obj instanceof TableColumn) {
TableColumn aColumn = (TableColumn)obj;
width += aColumn.getWidth();
width += margin;
} else {
width += ((ColumnGroup)obj).getSize(table).width;
}
}
return new Dimension(width, height);
}
public void setColumnMargin(int margin) {
this.margin = margin;
Enumeration e = v.elements();
while (e.hasMoreElements()) {
Object obj = e.nextElement();
if (obj instanceof ColumnGroup) {
((ColumnGroup)obj).setColumnMargin(margin);
}
}
}
}Creating the GroupableTableHeader class
public class GroupableTableHeader extends JTableHeader {
private static final String uiClassID = "GroupableTableHeaderUI";
protected Vector columnGroups = null;
public GroupableTableHeader(TableColumnModel model) {
super(model);
setUI(new GroupableTableHeaderUI());
setReorderingAllowed(false);
}
public void updateUI(){
setUI(new GroupableTableHeaderUI());
}
public void setReorderingAllowed(boolean b) {
reorderingAllowed = false;
}
public void addColumnGroup(ColumnGroup g) {
if (columnGroups == null) {
columnGroups = new Vector();
}
columnGroups.addElement(g);
}
public Enumeration getColumnGroups(TableColumn col) {
if (columnGroups == null) return null;
Enumeration e = columnGroups.elements();
while (e.hasMoreElements()) {
ColumnGroup cGroup = (ColumnGroup)e.nextElement();
Vector v_ret = (Vector)cGroup.getColumnGroups(col,new Vector());
if (v_ret != null) {
return v_ret.elements();
}
}
return null;
}
public void setColumnMargin() {
if (columnGroups == null) return;
int columnMargin = getColumnModel().getColumnMargin();
Enumeration e = columnGroups.elements();
while (e.hasMoreElements()) {
ColumnGroup cGroup = (ColumnGroup)e.nextElement();
cGroup.setColumnMargin(columnMargin);
}
}
}Creation of the GroupableTableHeaderUI class
public class GroupableTableHeaderUI extends BasicTableHeaderUI {
public void paint(Graphics g, JComponent c) {
Rectangle clipBounds = g.getClipBounds();
if (header.getColumnModel() == null) return;
((GroupableTableHeader)header).setColumnMargin();
int column = 0;
Dimension size = header.getSize();
Rectangle cellRect = new Rectangle(0, 0, size.width, size.height);
Hashtable h = new Hashtable();
int columnMargin = header.getColumnModel().getColumnMargin();
Enumeration enumeration = header.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
cellRect.height = size.height;
cellRect.y = 0;
TableColumn aColumn = (TableColumn)enumeration.nextElement();
Enumeration cGroups = ((GroupableTableHeader)header).getColumnGroups(aColumn);
if (cGroups != null) {
int groupHeight = 0;
while (cGroups.hasMoreElements()) {
ColumnGroup cGroup = (ColumnGroup)cGroups.nextElement();
Rectangle groupRect = (Rectangle)h.get(cGroup);
if (groupRect == null) {
groupRect = new Rectangle(cellRect);
Dimension d = cGroup.getSize(header.getTable());
groupRect.width = d.width;
groupRect.height = d.height;
h.put(cGroup, groupRect);
}
paintCell(g, groupRect, cGroup);
groupHeight += groupRect.height;
cellRect.height = size.height - groupHeight;
cellRect.y = groupHeight;
}
}
cellRect.width = aColumn.getWidth() + columnMargin;
if (cellRect.intersects(clipBounds)) {
paintCell(g, cellRect, column);
}
cellRect.x += cellRect.width;
column++;
}
}
private void paintCell(Graphics g, Rectangle cellRect, int columnIndex) {
TableColumn aColumn = header.getColumnModel().getColumn(columnIndex);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
//revised by Java2s.com
renderer = new DefaultTableCellRenderer(){
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
JLabel header = new JLabel();
header.setForeground(table.getTableHeader().getForeground());
header.setBackground(table.getTableHeader().getBackground());
header.setFont(table.getTableHeader().getFont());
header.setHorizontalAlignment(JLabel.CENTER);
header.setText(value.toString());
header.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return header;
}
};
Component c = renderer.getTableCellRendererComponent(
header.getTable(), aColumn.getHeaderValue(),false, false, -1, columnIndex);
c.setBackground(UIManager.getColor("control"));
rendererPane.add(c);
rendererPane.paintComponent(g, c, header, cellRect.x, cellRect.y,
cellRect.width, cellRect.height, true);
}
private void paintCell(Graphics g, Rectangle cellRect,ColumnGroup cGroup) {
TableCellRenderer renderer = cGroup.getHeaderRenderer();
//revised by Java2s.com
// if(renderer == null){
// return ;
// }
Component component = renderer.getTableCellRendererComponent(
header.getTable(), cGroup.getHeaderValue(),false, false, -1, -1);
rendererPane.add(component);
rendererPane.paintComponent(g, component, header, cellRect.x, cellRect.y,
cellRect.width, cellRect.height, true);
}
private int getHeaderHeight() {
int height = 0;
TableColumnModel columnModel = header.getColumnModel();
for(int column = 0; column < columnModel.getColumnCount(); column++) {
TableColumn aColumn = columnModel.getColumn(column);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
//revised by Java2s.com
if(renderer == null){
return 60;
}
Component comp = renderer.getTableCellRendererComponent(
header.getTable(), aColumn.getHeaderValue(), false, false,-1, column);
int cHeight = comp.getPreferredSize().height;
Enumeration e = ((GroupableTableHeader)header).getColumnGroups(aColumn);
if (e != null) {
while (e.hasMoreElements()) {
ColumnGroup cGroup = (ColumnGroup)e.nextElement();
cHeight += cGroup.getSize(header.getTable()).height;
}
}
height = Math.max(height, cHeight);
}
return height;
}
private Dimension createHeaderSize(long width) {
TableColumnModel columnModel = header.getColumnModel();
width += columnModel.getColumnMargin() * columnModel.getColumnCount();
if (width > Integer.MAX_VALUE) {
width = Integer.MAX_VALUE;
}
return new Dimension((int)width, getHeaderHeight());
}
public Dimension getPreferredSize(JComponent c) {
long width = 0;
Enumeration enumeration = header.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn)enumeration.nextElement();
width = width + aColumn.getPreferredWidth();
}
return createHeaderSize(width);
}
}Creating the GroupableTableHeaderExample class
public class GroupableHeaderExample extends JPanel {
public GroupableHeaderExample(ArrayList<Contador> contadores) {
JTable table = null;
//Se crea el modelo de la cabecera
DefaultTableModel dm = new DefaultTableModel();
String objectos [][] = new String[contadores.size()][3];
for(int i=0;i<contadores.size();i++){
System.out.println(contadores.get(i).toString());
System.out.println("---------------------------------------");
}
for(int i=0;i<objectos.length;i++){
objectos[i][0] = contadores.get(i).getFecha();
objectos[i][1] = String.valueOf(contadores.get(i).getLectura());
objectos[i][2] = "0";
}
// Mostrar los datos de dentro de array bidimensional.
for(int i=0;i<objectos.length;i++){
for(int j=0;j<objectos[i].length;j++){
System.out.println(objectos[i][j].toString());
}
}
//Insertar los datos en el modelo
dm.setDataVector(objectos,new Object[]{"Fecha","Lectura","Consumo"});
//Creación de la tabla con el modelo de cabecera principal
table = new JTable(dm) {
protected JTableHeader createDefaultTableHeader() {
return new GroupableTableHeader(columnModel);
}
};
//Se crea un segundo modelo
TableColumnModel cm = table.getColumnModel();//Se coge el modelo del header principal
ColumnGroup contador = new ColumnGroup(contadores.get(0).getSerialNumber());//Se crea un grupo
contador.add(cm.getColumn(1));
contador.add(cm.getColumn(2));
GroupableTableHeader header = (GroupableTableHeader)table.getTableHeader();
header.addColumnGroup(contador);
JScrollPane scroll = new JScrollPane(table);
this.add(scroll);
setSize( 600, 450);
}
}With these classes created, now we move on to the creation of the main class
Creating the main class
public class main extends javax.swing.JFrame {
/**
* Creates new form main
*/
public main() {
initComponents();
//Crear el arrayList
ArrayList<Contador> contadores = new ArrayList<Contador>();
//Insertar datos al arrayList
contadores.add(new Contador("P44152F", "10:00:00", "21/03/2017", 100.00));
contadores.add(new Contador("R44152F", "11:00:00", "22/03/2017", 99.00));
//Se crea el panel con los datos correspondientes
GroupableHeaderExample panel = new GroupableHeaderExample(contadores);
jPanelTabla.add(panel);
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanelTabla = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
javax.swing.GroupLayout jPanelTablaLayout = new javax.swing.GroupLayout(jPanelTabla);
jPanelTabla.setLayout(jPanelTablaLayout);
jPanelTablaLayout.setHorizontalGroup(
jPanelTablaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 683, Short.MAX_VALUE)
);
jPanelTablaLayout.setVerticalGroup(
jPanelTablaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 311, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(95, 95, 95)
.addComponent(jPanelTabla, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(501, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(41, 41, 41)
.addComponent(jPanelTabla, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(240, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
System.out.println(info.getName());
if ("Windows".equals(info.getName())) {
try {
UIManager.setLookAndFeel(info.getClassName());
} catch (ClassNotFoundException ex) {
Logger.getLogger(main.class.getName()).log(Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
Logger.getLogger(main.class.getName()).log(Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
Logger.getLogger(main.class.getName()).log(Level.SEVERE, null, ex);
} catch (UnsupportedLookAndFeelException ex) {
Logger.getLogger(main.class.getName()).log(Level.SEVERE, null, ex);
}
break;
}
}
new main().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JPanel jPanelTabla;
// End of variables declaration
}With this I have been able to solve the problem. Here you have a capture of the execution:
answered by
17.03.2017 в 13:29