Cell rendering bug on win 2k?
hi,
I have extended DefaultCellRenderer for a JTree to switch text color depending on a flag for different tree nodes. The problem is that although the getTreeCellRendererComponent call works (and the flags are correct - verified through println calls) and the screen updates, the wrong colors are shown for different cells!
I'm sure this must be a bug, has anyone else seen it?
thanks,
andrew
hi,
thanks for the reply. the reason I'm so certain is that I know only the correct nodes are being flagged as /red/, and so that the color is being changed in the correct places. here is the code I'm using - WhTreeNode is just a DefaultMutableTreeNode with a flag amongst other stuff, that can be read through isActual(). (all nodes in the JTree being rendered are WhTreeNodes)
thanks,
andrew
public Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus)
super.getTreeCellRendererComponent(
tree, value, sel,
expanded, leaf, row,
hasFocus);
setTextNonSelectionColor(Color.black);
setTextSelectionColor(Color.black);
if (value instanceof WhTreeNode)
System.out.print(value+" ");
if(!((WhTreeNode)value).isActual())
System.out.println("red");
setTextNonSelectionColor(Color.red);
setTextSelectionColor(Color.red);
return this;
}
Similar Messages
-
Inconsistent behavior with Custom Cell Renderer
I have two questions:
Questions # 1.
I have created a custom cell renderer for my JTable that changes color if the text property changes and the text contains the letter 'S'. Like
so:
class SchedRenderer extends DefaultTableCellRenderer{
public SchedRenderer(){
super();
final Color c = scSelfCont.panelbg;
this.setForeground(c);
this.addPropertyChangeListener("text",new PropertyChangeListener(){
public void propertyChange(PropertyChangeEvent e){
boolean foundS=false;
String text=e.getNewValue().toString();
for(int i=0;i<text.length();i++)
if(text.charAt(i)=='S'){
foundS=true;
break;
if(foundS){
SchedRenderer.this.setBackground(Color.red);
SchedRenderer.this.setForeground(Color.red);
else{
SchedRenderer.this.setBackground(c);
SchedRenderer.this.setForeground(c);
99% of the time it works just fine. But occasionally the cell will revert back to its original color, and then back to the correct color after clicking somewhere entirely different. I set some breakpoints in the property change handler and it gets called quite frquently even if no change has been made. At first I thought this was a JDK bug, but I am now convinced that there simply must be a better way to do this, any ideas?
Question # 2:
Is there a simple way to change the color of an entire row without selecting it? Currently I am using Custom Cell Renderers to change
colors of cells, but it seems like such an obtuse method. Is there a better way?
Thanks in advance.
Adrian CalvinI have two questions:
Questions # 1.
I have created a custom cell renderer for my JTable that changes color if the text property changes and the text contains the letter 'S'. Like
so:
class SchedRenderer extends DefaultTableCellRenderer{
public SchedRenderer(){
super();
final Color c = scSelfCont.panelbg;
this.setForeground(c);
this.addPropertyChangeListener("text",new PropertyChangeListener(){
public void propertyChange(PropertyChangeEvent e){
boolean foundS=false;
String text=e.getNewValue().toString();
for(int i=0;i<text.length();i++)
if(text.charAt(i)=='S'){
foundS=true;
break;
if(foundS){
SchedRenderer.this.setBackground(Color.red);
SchedRenderer.this.setForeground(Color.red);
else{
SchedRenderer.this.setBackground(c);
SchedRenderer.this.setForeground(c);
[\code]
99% of the time it works just fine. But occasionally the cell will revert back to its original color, and then back to the correct color after clicking somewhere entirely different. I set some breakpoints in the property change handler and it gets called quite frquently even if no change has been made. At first I thought this was a JDK bug, but I am now convinced that there simply must be a better way to do this, any ideas?
Question # 2:
Is there a simple way to change the color of an entire row without selecting it? Currently I am using Custom Cell Renderers to change
colors of cells, but it seems like such an obtuse method. Is there a better way?
Thanks in advance.
Adrian Calvin -
How to make JTree cell renderer respect layout?
Hi,
In the JTree tutorial, the first example TreeDemo shows a simple tree.
http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html
If you grab the frame and make it really thin, you get a horizontal scroll bar in the top pane.
How can I make it so that the tree cells just draw "..." at the end of the string if there is not enough space?
I know the tree cell renderer uses JLabel, but they never seem to show "...", which is one of the best features of a JLabel. Any help is greatly appreciated!Hi,
I got it working, but I also discovered a Java bug that ruins all this effort!
Calculating the node's position & width:
- When child nodes are indented, there is an "L" shaped line drawn... the space to the left of the line's vertical bar is the "leftChildIndent", and the space to the right is the "rightChildIndent". So you add both to get the whole indent.
- I use label.getPreferredSize().width to figure out the node width, since that includes the icon width, the icon-text gap, and the font metrics.
Example program:
- This program models how I want it to look... Always expanded and automatic "..." when the scroll pane is not big enough.
Bug found:
- There is a runnable example below. Just run it and after a couple seconds, move the split pane to the right.
- I use a timer to add a new node every 1 second. The new nodes get stuck being too small, and the original nodes don't have this problem.
// =====================================================
* Adaptation of TreeDemo to allow for tree nodes that show "..."
* when there is not enough space to display the whole label.
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTree;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeWillExpandListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.ExpandVetoException;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreeSelectionModel;
public class TreeDemo extends JPanel {
private JTree tree;
protected class EllipsesTreeCellRenderer implements TreeCellRenderer {
Integer leftIndent = (Integer) UIManager.get("Tree.leftChildIndent");
Integer rightIndent = (Integer) UIManager.get("Tree.rightChildIndent");
int indent = leftIndent.intValue() + rightIndent.intValue();
JLabel label = new JLabel();
DefaultTreeCellRenderer r = new DefaultTreeCellRenderer();
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
label.setText("why hello there why hello there why hello there");
if (selected) {
label.setForeground(r.getTextSelectionColor());
label.setBackground(r.getBackgroundSelectionColor());
} else {
label.setForeground(r.getTextNonSelectionColor());
label.setBackground(r.getBackgroundNonSelectionColor());
if (leaf) {
label.setIcon(r.getLeafIcon());
} else if (expanded) {
label.setIcon(r.getOpenIcon());
} else {
label.setIcon(r.getClosedIcon());
label.setComponentOrientation(tree.getComponentOrientation());
int labelWidth = label.getPreferredSize().width;
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
int level = node.getLevel();
if (!tree.isRootVisible()) {
--level;
int indentWidth = indent * level;
int rendererWidth = labelWidth + indentWidth;
// This is zero the first few times getTreeCellRenderer is called
// because the tree is not yet visible.
int maxWidth = (int) tree.getVisibleRect().getWidth();
if (maxWidth > 0) {
if (rendererWidth > maxWidth) {
// figure out how much space "..." will consume.
label.setText(label.getText() + "...");
maxWidth = maxWidth
- (label.getPreferredSize().width - labelWidth);
label.setText(label.getText());
// chop off characters until "..." fits in the visible
// portion.
if (maxWidth > 0) {
while (rendererWidth > maxWidth
&& label.getText().length() > 1) {
label.setText(label.getText().substring(0,
label.getText().length() - 2));
rendererWidth = indentWidth
+ label.getPreferredSize().width;
label.setText(label.getText() + "...");
return label;
public TreeDemo() {
super(new GridLayout(1, 0));
//Create the nodes.
final DefaultMutableTreeNode top = new DefaultMutableTreeNode("");
createNodes(top);
//Create a tree that allows one selection at a time.
tree = new JTree(top);
tree.getSelectionModel().setSelectionMode(
TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setCellRenderer(new EllipsesTreeCellRenderer());
tree.addTreeWillExpandListener(new TreeWillExpandListener() {
public void treeWillExpand(TreeExpansionEvent event) {
public void treeWillCollapse(TreeExpansionEvent event)
throws ExpandVetoException {
throw new ExpandVetoException(event);
for (int i = tree.getRowCount(); i >= 0; i--) {
tree.expandRow(i);
//Create the scroll pane and add the tree to it.
JScrollPane treeView = new JScrollPane(tree);
//Add the scroll panes to a split pane.
JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
splitPane.setTopComponent(treeView);
splitPane.setBottomComponent(new JLabel(""));
Dimension minimumSize = new Dimension(0, 0);
treeView.setMinimumSize(minimumSize);
splitPane.setDividerLocation(200); //XXX: ignored in some releases
//of Swing. bug 4101306
//workaround for bug 4101306:
//treeView.setPreferredSize(new Dimension(100, 100));
// Makes tree nodes appear cut-off initially.
splitPane.setPreferredSize(new Dimension(500, 300));
//Add the split pane to this panel.
add(splitPane);
// Adds a new node every 1 second
Timer timer = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
DefaultMutableTreeNode child = new DefaultMutableTreeNode("");
model.insertNodeInto(child, top, 0);
for (int i = tree.getRowCount(); i >= 0; i--) {
tree.expandRow(i);
timer.start();
private void createNodes(DefaultMutableTreeNode top) {
DefaultMutableTreeNode category = null;
DefaultMutableTreeNode book = null;
category = new DefaultMutableTreeNode("");
top.add(category);
category.add(new DefaultMutableTreeNode(""));
category.add(new DefaultMutableTreeNode(""));
category.add(new DefaultMutableTreeNode(""));
category.add(new DefaultMutableTreeNode(""));
category.add(new DefaultMutableTreeNode(""));
category.add(new DefaultMutableTreeNode(""));
category.add(new DefaultMutableTreeNode(""));
category.add(new DefaultMutableTreeNode(""));
category.add(new DefaultMutableTreeNode(""));
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
private static void createAndShowGUI() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
System.err.println("Couldn't use system look and feel.");
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
JFrame frame = new JFrame("TreeDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TreeDemo newContentPane = new TreeDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
} -
Custom Table Cell Renderer Unable To Set Horizontal Alignment
Hello,
I have a problem that I'm at my wit's end with, and I was hoping for some help.
I need to render the cells in my table differently (alignment, colors, etc) depending on the row AND the column, not just the column. I've got this working just fine, except for changing the cell's horizontal alignment won't work.
I have a CustomCellRenderer that extends DefaultTableCellRenderer and overrides the getTableCellRendererComponent() method, setting the foreground/background colors and horizontal alignment of the cell based on the cell's value.
I have a CustomTable that extends JTable and overrides the getCellRenderer(int row, int column) method to return a private instance of this CustomCellRenderer.
This works fine for foreground/background colors, but my calls to setHorizontalAlignment() in the getTableCellRendererComponent() seem to have no effect, every cell is always displayed LEFT aligned! It's almost like the cell's alignment is determined by something else than the table.getCellRenderer(row,column).getTableCellRendererComponent() method.
I've also tried setting the renderer for every existing TableColumn in the TableModel to this custom renderer, as well as overriding the table's getDefaultColumn() method to return this custom renderer as well for any Class parameter, with no success.
No matter what I've tried, I can customize the cell however I want, EXCEPT for the horizontal alignment!!!
Any ideas???
Here's the core custom classes that I'm using:
class CustomTable extends JTable {
private CustomRenderer customRenderer = new CustomRenderer();
public CustomTable() {
super();
public TableCellRenderer getCellRenderer(int row, int column) {
return customRenderer;
} // end class CustomTable
class CustomRenderer extends DefaultTableCellRenderer {
public CustomRenderer() {
super();
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (row % 2 == 0) {
setForeground(Color.red);
setHorizontalAlignment(RIGHT);
} else {
setForeground(Color.blue);
setHorizontalAlignment(LEFT);
return this;
} // end class CustomRenderer
Even worse, I've gotten this to work fine in a trivial example I made to try and re-create the problem. But for some reason, this same thing is just not working for horizontal alignment in my actual project?!?
Anyone have any ideas how the cell's horizontal alignment set in the getTableCellRendererComponent() method is being ignored or overwritten before the cell is being displayed???
Thanks, any help is appreciated,
-Alex BlumeOk, so I've looked into their source and I think I know where and what the trouble is. The JTable.java has a method called:
3658> public TableCellRenderer getCellRenderer(int row, int column) {
3659> TableColumn tableColumn = getColumnModel().getColumn(column);
3660> TableCellRenderer renderer = tableColumn.getCellRenderer();
3661> if (renderer == null) {
3662> renderer = getDefaultRenderer(getColumnClass(column));
3663> }
3664> return renderer;
3665> }
starting at line 3658 of their source code. It retrieves the TableCellRenderer on line 3660 by calling the tableColumn's getCellRenderer method. This is found in the TableColumn.java class:
421> public TableCellRenderer getCellRenderer() {
422> return cellRenderer;
423> }
See the problem? Only ONE cell Renderer. It's referring to a variable found at line 140 which is of type TableCellRenderer ... well actually it's created as a DefaultTableCellRenderer at some point since TableCellRenderer is an interface.
Basically the fix is this:
In the TableColumn.java file, a collection (Vector, LinkedList, whatever) needs to keep track of each cell's renderer. This will solve the solution. Of course this will be something that you or I can make.
What's funny is the contradiction in documentation between JTable's and TableColumn's getCellRenderer() method. First, if we look at TableColumn's documentation it states:
"Returns the TableCellRenderer used by the JTable to draw values for this column."
Based on that first statement, the getCellRenderer() method in TableColumn is doing its job exactly. No lies, no contradictions in what it does.
However, that method is called up inside of the JTable's getCellRenderer() method which says a completely different thing which is:
"Returns an appropriate renderer for the cell specified by this row and column."
Now we have a problem. For the cell specified. It appears that the rush to push this out blinded some developer who either:
1) mis-interpreted what the JTable getCellRenderer() method was supposed to do and inadvertently added a feature or;
2) was in a 2 a.m. blitz, wired on Pepsi and adrenalin and wrote the bug in.
Either way, I'm really hoping that they'll fix this because it will take care of at least 2 bugs. Btw, anyone interested in posting a subclass to solve this problem (subclass of TableColumn) is more than welcome. I've spent much too much time on this and my project is already behind so I can't really afford any more time on this.
later,
a. -
Problem with addRow and MultiLine Cell renderer
Hi ,
Ive a problem with no solution to me .......
Ive seen in the forum and Ivent found an answer.......
The problem is this:
Ive a JTable with a custom model and I use a custom multiline cell renderer.
(becuse in the real application "way" hasnt static lenght)
When I add the first row all seem to be ok.....
when I try to add more row I obtain :
java.lang.ArrayIndexOutOfBoundsException: 1
at javax.swing.SizeSequence.insertEntries(SizeSequence.java:332)
at javax.swing.JTable.tableRowsInserted(JTable.java:2926)
at javax.swing.JTable.tableChanged(JTable.java:2858)
at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableMo
del.java:280)
at javax.swing.table.AbstractTableModel.fireTableRowsInserted(AbstractTa
bleModel.java:215)
at TableDemo$MyTableModel.addRow(TableDemo.java:103)
at TableDemo$2.actionPerformed(TableDemo.java:256)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:17
64)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Abstra
ctButton.java:1817)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:419)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:245)
at java.awt.Component.processMouseEvent(Component.java:5134)
at java.awt.Component.processEvent(Component.java:4931)
at java.awt.Container.processEvent(Container.java:1566)
at java.awt.Component.dispatchEventImpl(Component.java:3639)
at java.awt.Container.dispatchEventImpl(Container.java:1623)
at java.awt.Component.dispatchEvent(Component.java:3480)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
at java.awt.Container.dispatchEventImpl(Container.java:1609)
at java.awt.Window.dispatchEventImpl(Window.java:1590)
at java.awt.Component.dispatchEvent(Component.java:3480)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:197)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
This seems to be caused by
table.setRowHeight(row,(getPreferredSize().height+2)); (line 164 of my example code)
About the model I think its ok.....but who knows :-(......
Please HELP me in anyway!!!
Example code :
import javax.swing.*;
import javax.swing.table.*;
import java.text.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class TableDemo extends JFrame {
private boolean DEBUG = true;
MyTableModel myModel = new MyTableModel();
MyTable table = new MyTable(myModel);
int i=0;
public TableDemo() {
super("TableDemo");
JButton bottone = new JButton("Aggiungi 1 elemento");
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
//table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Add the scroll pane to this window.
getContentPane().add(bottone,BorderLayout.NORTH);
getContentPane().add(scrollPane, BorderLayout.CENTER);
bottone.addActionListener(Add_Action);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
class MyTable extends JTable {
MultiLineCellRenderer multiRenderer=new MultiLineCellRenderer();
MyTable(TableModel tm)
super(tm);
public TableCellRenderer getCellRenderer(int row,int col) {
if (col==1) return multiRenderer;
else return super.getCellRenderer(row,col);
class MyTableModel extends AbstractTableModel {
Vector data=new Vector();
final String[] columnNames = {"Name",
"Way",
"DeadLine (ms)"
public int getColumnCount() { return 3; }
public int getRowCount() { return data.size(); }
public Object getValueAt(int row, int col) {
Vector rowdata=(Vector)data.get(row);
return rowdata.get(col); }
public String getColumnName(int col) {
return columnNames[col];
public void setValueAt (Object value, int row,int col)
//setto i dati della modifica
Vector actrow=(Vector)data.get(row);
actrow.set(col,value);
this.fireTableCellUpdated(row,col);
public Class getColumnClass(int c)
return this.getValueAt(0,c).getClass();
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col == 1)
return false;
else
return true;
public void addRow (String name,ArrayList path,Double dead) {
Vector row =new Vector();
row.add(name);
row.add(path);
row.add(dead);
row.add(name); //!!!Mi tengo questo dato da utilizzare come key per andare a
//prendere il path nella lista dei paths di Project
//(needed as key to retrive data if name in col. 1 is changed)
data.add(row);
//Inspector.inspect(this);
System.out.println ("Before firing Adding row...."+this.getRowCount());
this.fireTableRowsInserted(this.getRowCount(),this.getRowCount());
public void delRow (String namekey)
for (int i=0;i<this.getRowCount();i++)
if (namekey.equals(this.getValueAt(i,3)))
data.remove(i);
this.fireTableRowsDeleted(i,i);
//per uscire dal ciclo
i=this.getRowCount();
public void delAllRows()
int i;
int bound =this.getRowCount();
for (i=0;i<bound;i++)
{data.remove(0);
System.out.println ("Deleting .."+data);
this.fireTableRowsDeleted(0,i);
class MultiLineCellRenderer extends JTextArea implements TableCellRenderer {
private Hashtable rowHeights=new Hashtable();
public MultiLineCellRenderer() {
setEditable(false);
setLineWrap(true);
setWrapStyleWord(true);
//this.setBorder(new Border(
public Component getTableCellRendererComponent(JTable table,Object value, boolean isSelected, boolean hasFocus, int row, int column) {
//System.out.println ("Renderer called"+value.getClass());
if (value instanceof ArrayList) {
String way=new String (value.toString());
setText(way);
TableColumn thiscol=table.getColumn("Way");
//System.out.println ("thiscol :"+thiscol.getPreferredWidth());
//setto il size della JTextarea sulle dimensioni della colonna
//per quanto riguarda il widht e su quelle ottenute da screen per l'height
this.setSize(thiscol.getPreferredWidth(),this.getPreferredSize().height);
// set the table's row height, if necessary
//System.out.println ("Valore getPreferred.height"+getPreferredSize().height);
if (table.getRowHeight(row)!=(this.getPreferredSize().height+2))
{System.out.println ("Setting Row :"+row);
System.out.println ("Dimension"+(getPreferredSize().height+2));
System.out.println ("There are "+table.getRowCount()+"rows in the table ");
if (row<table.getRowCount())
table.setRowHeight(row,(getPreferredSize().height+2));
else
setText("");
return this;
/**Custom JTextField Subclass che permette all'utente di immettere solo numeri
class WholeNumberField extends JTextField {
private Toolkit toolkit;
private NumberFormat integerFormatter;
public WholeNumberField(int value, int columns) {
super(columns);
toolkit = Toolkit.getDefaultToolkit();
integerFormatter = NumberFormat.getNumberInstance(Locale.US);
integerFormatter.setParseIntegerOnly(true);
setValue(value);
public int getValue() {
int retVal = 0;
try {
retVal = integerFormatter.parse(getText()).intValue();
} catch (ParseException e) {
// This should never happen because insertString allows
// only properly formatted data to get in the field.
toolkit.beep();
return retVal;
public void setValue(int value) {
setText(integerFormatter.format(value));
protected Document createDefaultModel() {
return new WholeNumberDocument();
protected class WholeNumberDocument extends PlainDocument {
public void insertString(int offs,
String str,
AttributeSet a)
throws BadLocationException {
char[] source = str.toCharArray();
char[] result = new char[source.length];
int j = 0;
for (int i = 0; i < result.length; i++) {
if (Character.isDigit(source))
result[j++] = source[i];
else {
toolkit.beep();
System.err.println("insertString: " + source[i]);
super.insertString(offs, new String(result, 0, j), a);
ActionListener Add_Action = new ActionListener() {
public void actionPerformed (ActionEvent e)
System.out.println ("Adding");
ArrayList way =new ArrayList();
way.add(new String("Uno"));
way.add(new String("Due"));
way.add(new String("Tre"));
way.add(new String("Quattro"));
myModel.addRow(new String("Nome"+i++),way,new Double(0));
public static void main(String[] args) {
TableDemo frame = new TableDemo();
frame.pack();
frame.setVisible(true);In the addRow method, change the line
this.fireTableRowsInserted(this.getRowCount(),this.getRowCount()); to
this.fireTableRowsInserted(data.size() - 1, data.size() - 1);Sai Pullabhotla -
Table cell renderer works with any L&F, but not with Windows
Hi,
I created a table cell renderer / editor for a combobox in a table cell. This works all as expected, but if the Look&Feel is com.sun.java.swing.plaf.windows.WindowsLookAndFeel, which is the system L&F on Vista, the selected values in the combobox are not shown in the cell after loosing focus. Metal LF and Motif LF work, and a third party one "TinyLF" works as well.
Can anyone imagine why, and what needs to be changed to get a cross platform consistency without Metal LF?
A compilable demo:
import java.awt.BorderLayout;
import java.awt.Component;
import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import javax.swing.DefaultCellEditor;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
public class Test {
static class CellRendererWithComboBox extends JLabel implements TableCellRenderer {
JLabel label = new JLabel();
* Set this renderer to the given column
* @param column
* @param r
* @param editable
public void setRendererTo(JTable table, int column, boolean editable) {
TableColumn col = table.getColumnModel().getColumn(column);
JComboBox xc = new JComboBox(new DefaultComboBoxModel(new Object[]{1, 2, 3, 4, 5, 6, 7}));
col.setCellEditor(new ComboBoxEditor(xc));
col.setCellRenderer(this);
xc.setEditable(editable);
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if (hasFocus && isSelected) {
if (isSelected) {
label.setForeground(table.getSelectionForeground());
label.setBackground(table.getSelectionBackground());
} else {
label.setForeground(table.getForeground());
label.setBackground(table.getBackground());
label.setText((value == null) ? "" : value.toString());
return label;
} else {
label.setText((value == null) ? "" : value.toString());
return label;
class ComboBoxEditor extends DefaultCellEditor {
private final JComboBox box;
private boolean fire = true;
public ComboBoxEditor(JComboBox b) {
super(b);
this.box = b;
b.setLightWeightPopupEnabled(false);
@Override
public boolean stopCellEditing() {
if (fire) {
super.stopCellEditing();
return true;
public void stopCellEditingSilent() {
fire = false;
stopCellEditing();
fire = true;
public static void main(String... aArgs) throws NoSuchAlgorithmException, IOException {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException classNotFoundException) {
} catch (InstantiationException instantiationException) {
} catch (IllegalAccessException illegalAccessException) {
} catch (UnsupportedLookAndFeelException unsupportedLookAndFeelException) {
JFrame p = new JFrame();
JTable t = new JTable();
TableModel m = new DefaultTableModel(new Object[][]{
new Object[]{1, 2, 3, 4, 5, 6, 7},
new Object[]{1, 2, 3, 4, 5, 6, 7},
new Object[]{1, 2, 3, 4, 5, 6, 7},
new Object[]{1, 2, 3, 4, 5, 6, 7},
new Object[]{1, 2, 3, 4, 5, 6, 7}},
new Object[]{1, 2, 3, 4, 5, 6, 7});
t.setModel(m);
Test.CellRendererWithComboBox f = new CellRendererWithComboBox();
f.setRendererTo(t, 1, true);
p.setLayout(new BorderLayout());
p.add(t, BorderLayout.CENTER);
p.pack();
p.setVisible(true);
}1) Your custom cell renderer does nothing extra, so you can depend on default renderer.
2) Instead of extending JLabel and implementing TableCellReneder, you should extend DefaultTableCellRenderer and override its get renderer method because DefaultTableCellRenderer itself extends JLabel and aditionally it does some optimizations etc., which you can miss if you implement your own renderer.
3) If you set foreground and background color in last else statement also, then you can see the values correctly in windows L&F as well.
Thanks! -
Event Handling in JTable Custom Cell Renderer
I have a JLabel as a custom cell Renderer for a column. I want to handle mouse click event for the JLabel rendered in the cell.
I tried adding the listener for the label in the custom cell renderer but it is not working. Any ideas how to handle this problem??
Thanks
S.AnandIf you want to handle the selection of a tree node
1) write a class like:
public class TreePaneListener implements TreeSelectionListener {
// TREE SELECTION LISTENER
public void valueChanged(TreeSelectionEvent e) {
JTree tree = (JTree)e.getSource();
DefaultMutableTreeNode node = null;
int count = 0;
boolean doSomething = false;
if(tree.getSelectionCount() > 1) {
TreePath[] selection = tree.getSelectionPaths();
int[] temp = new int[selection.length];
for(int i =0; i < selection.length; i++) {
// Check each node for selection
node = (DefaultMutableTreeNode)selection.getLastPathComponent();
if(node.getLevel()==2) {
// Change this code to take the action desired
doSomething = true;
2) After creating the tree register the listener
TreePaneListener handler = new TreePaneListener();
tree.addTreeSelectionListener(handler); -
Set Background/Foreground color for Cell Renderer in JComboBox
Hello,
I was wondering if there is a way to change default settings for when I browse items under a JComboBox's cell renderer? I want the item's color to change (to what I set it to), when mouse enters the item. As of now, the cell's background color changes to Blue when I enter it. Is this default for JComboBox or might it have been set somewhere, that I need to look into?
Please let me know if there are ways to do this.
Thanks!
Message was edited by:
programmer_girlHere's my SSCCE:
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JComboBox;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.text.DefaultHighlighter;
public class MyComboBoxTest extends JPanel {
* @param args
String[] patterns = {"pattern1","pattern2","pattern3"};
public MyComboBoxTest()
JPanel patternsPanel = new JPanel();
setMinimumSize(new Dimension(100, 100));
JComboBox patternList = new JComboBox(patterns);
final JTextField editor = (JTextField) patternList.getEditor().getEditorComponent();
patternList.setEditable(true);
this.add(patternsPanel);
patternsPanel.add(patternList);
patternList.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
editor.setSelectedTextColor(Color.WHITE);
editor.setForeground(Color.WHITE);
try{
editor.getHighlighter().addHighlight(0, editor.getText().length(),new DefaultHighlighter.DefaultHighlightPainter(Color.BLUE));
} catch (Exception ex){
ex.getMessage();
editor.addMouseListener(new MouseAdapter()
public void mouseClicked(MouseEvent e)
editor.getHighlighter().removeAllHighlights();
editor.setForeground(Color.BLACK);
editor.setSelectedTextColor(Color.BLACK);
public static void main(String[] args) {
// TODO Auto-generated method stub
JFrame frame = new JFrame("My ComboBox Demo");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setSize(100, 100);
frame.getContentPane().add(new MyComboBoxTest());
frame.setLocation(50, 50);
frame.pack();
frame.setVisible(true);
} -
How to display multiple JComponents in a tree cell renderer
I have an object in a tree cell renderer and want to display its members(three members) status in a JTree as checkboxes such that each node displays three checkboxex with member-names and a node name. i tried using a JPanel and adding three labels into this panel to be returned for the cell renderer but the GUI fails to paint the node componnents. However on clicking the node the component which isn't visible displays correctly. please Help me out
Since you didn't provide any sample code, it's all about wild guesses on what your problem is. The following code shows the type of program you could have posted :import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
public class TestTree extends JPanel {
private static class MyCell {
String theCellName;
boolean theFirstField;
boolean theSecondField;
boolean theThirdField;
public MyCell(String aName, boolean firstField, boolean secondField, boolean thirdField) {
theCellName = aName;
theFirstField = firstField;
theSecondField = secondField;
theThirdField = thirdField;
private static class MyTreeCellRenderer extends JPanel implements TreeCellRenderer {
private JLabel theCellNameLabel;
private JCheckBox theFirstCheckBox;
private JCheckBox theSecondCheckBox;
private JCheckBox theThirdCheckBox;
private DefaultTreeCellRenderer theDelegate;
public MyTreeCellRenderer() {
super(new GridLayout(4, 1));
theCellNameLabel = new JLabel();
add(theCellNameLabel);
theFirstCheckBox = new JCheckBox("firstField");
add(theFirstCheckBox);
theSecondCheckBox = new JCheckBox("secondField");
add(theSecondCheckBox);
theThirdCheckBox = new JCheckBox("thirdField");
add(theThirdCheckBox);
theDelegate = new DefaultTreeCellRenderer();
setOpaque(true);
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected,
boolean expanded, boolean leaf, int row, boolean hasFocus) {
if (!(value instanceof DefaultMutableTreeNode)) {
return theDelegate.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
Object userObject = ((DefaultMutableTreeNode)value).getUserObject();
if (!(userObject instanceof MyCell)) {
return theDelegate.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
setBackground(tree.getBackground());
if (selected) {
setBorder(BorderFactory.createLineBorder(Color.BLUE, 2));
} else {
setBorder(BorderFactory.createLineBorder(getBackground(), 2));
MyCell cell = (MyCell)userObject;
theCellNameLabel.setText(cell.theCellName);
theFirstCheckBox.setSelected(cell.theFirstField);
theSecondCheckBox.setSelected(cell.theSecondField);
theThirdCheckBox.setSelected(cell.theThirdField);
return this;
public Component add(Component comp) {
if (comp instanceof JComponent) {
((JComponent)comp).setOpaque(false);
return super.add(comp);
public TestTree() {
super(new BorderLayout());
JTree tree = new JTree(createModel());
tree.setShowsRootHandles(true);
tree.setCellRenderer(new MyTreeCellRenderer());
add(new JScrollPane(tree), BorderLayout.CENTER);
private static final TreeModel createModel() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode(new MyCell("root", true, true, true));
DefaultMutableTreeNode child1 = new DefaultMutableTreeNode(new MyCell("child1", false, true, false));
DefaultMutableTreeNode child2 = new DefaultMutableTreeNode(new MyCell("child2", false, false, true));
root.add(child1);
root.add(child2);
return new DefaultTreeModel(root);
public static void main(String[] args) {
final JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new TestTree());
SwingUtilities.invokeLater(new Runnable() {
public void run() {
frame.setSize(600, 400);
frame.show();
} -
Custom table cell renderer in a JTable is not called
Hello, all,
I have the following task: I need to select several cells in a column, change the value of those cells, and once the value changes, the color of these cells should change as well. I wrote a custom cell renderer, and registered it for the object type that will use it to render the cell. However, the custom cell renderer is never called. Instead, the class name of the object is displayed in the cell.
My code snippents are as follows:
//Declare the table and add custom cell renderer
JTable table = new JTable (7,7);
table.setCellSelectionEnabled (true);
table.setSelectionMode (ListSelectionModel.SINGLE_INTERVAL_SELECTION);
//Add the custom cell renderer to render objects of type Item
table.setDefaultRenderer(Item.class, new CustomTableCellRenderer());
//Get the selected cells and change the object type in those cells
//This part works, since I see the app entering the for loop in the debugger, and the item.toString() value is displayed in each selected cell
int rowIndexStart = table.getSelectedRow();
int rowIndexEnd = table.getSelectionModel().getMaxSelectionIndex();
int colIndex = table.getSelectedColumn();
Item item = new Item ();
for (int i = rowIndexStart; i<=rowIndexEnd; i++){
table.setValueAt(item, i, colIndex);
//I expect the cell to redraw now using custom cell renderer defined below, but that cell render is never called. Instead, the item.toString() value is displayed in the cell. What is wrong?
//Definition of custom cell renderer.
//the getTableCellRendererComponent is never called, since the System.out.println never prints. I expected this method to be called as soon as the Item object is added to the cell. Am I wrong in expecting that?
class CustomTableCellRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent (JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
Component cell = super.getTableCellRendererComponent (table, value, isSelected, hasFocus, row, column);
System.out.println("value: "+value.getClass()+" isSelected "+isSelected+" hasFocus "+hasFocus+" row "+row+" col "+column);
if (this.isFocusOwner()) {
cell.setBackground( Color.red );
cell.setForeground( Color.white );
return cell;
} Please, help,
Thank you!
ElanaThe suggestion given above assumes that all the data in a given column is of the same type.
If you have different types of data in different rows the you should be overriding the getCellRenderer(...) method. Something like:
public TableCellRenderer getCellRenderer(int row, int column)
Object o = getValueAt(row, column);
if (o instanceof Item)
return yourCustomRenderer
else
return super.getCellRenderer(row, column);
} -
CheckBox in customized cell renderer - Urgent
i need to customize the cell renderer for a table for one of the columns. One of the column is Boolean type and i want it the way it comes in a default cell renderer.
if i mention the renderer for the column as "checkbox" - it gives me the checkbox "left aligned" i want it in the center.
what shall i do?that works.
thanks ivan.
could i get the same result with defaultTableCellRenderer? as it extends JLabel i get the label-"true/false" not the checkbox. -
JTable with JPanel form as cell renderer/editor
I have a JTable that uses a custom cell editor/renderer. The cell editor/renderer is a JPanel form with labels and text panes. As the user edits the information, I adjust the table row height (setRowHeight) and the JPanel layout manager updates the layout on the cell editor. This all seems to work fine. However, when the user exists the cell and the cell renderer is shown, it has the correct new row height but has not been correctly layed-out for the new row height. How do I force my cell renderer to be re-layout after the editor closes?
That does not seem to work. I have done the following:
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int r, int c)
this.table = (EditorTable) table;
row = r;
column = c;
if (isSelected)
setBackground (Preferences.selectedRowBgColor);
else
setBackground (formBg);
// constructs the panel components
setCellValue (value);
revalidate();
return (this); -
Tree Cell Renderer settings for displaying complete text.
I have a tree model. It is of the form
abc (123.00)
-----def (456.00)
----------ghi (678.00)
But it is displayed like
abc (12...
-----def (45..
----------ghi (67..
I don't want the numbers in the end to be missing. It is a problem for the user to expand them everytime.
I am using, JTree and using my cell renderer, with following properties in
super.getTreeCellRendererComponent(tree, false, X, false, false, row, false);I did try to change it to
super.getTreeCellRendererComponent(tree, false, X, TRUE, false, row, false);but still no success.
My function toString() for tree elements looks like this
double u = "123.00";
String num = String.format("%.2f", u);
return getName() + " (" + num + ")";Can you please suggest possible way around for this?package abc;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.WindowConstants;
import javax.swing.JFrame;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeSelectionModel;
public class NewJPanel extends javax.swing.JPanel implements MouseListener {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.getContentPane().add(new NewJPanel());
frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
frame.pack();
frame.setVisible(true);
JTree m_tree;
private JScrollPane myPane;
float multi = 1;
DefaultTreeModel tree = new DefaultTreeModel(new ContainerNode("root"));
DefaultMutableTreeNode parent = (DefaultMutableTreeNode)tree.getRoot();
public NewJPanel() {
super(new BorderLayout());
String util = String.format("%.2f", 123456789012345679801234567980.00);
util = "abc" + " (" + util + ")";
DefaultMutableTreeNode e = new DefaultMutableTreeNode(util);
tree.insertNodeInto(e, parent, 0);
m_tree = new JTree(tree);
m_tree.setEditable(false);
m_tree.setDragEnabled(false);
m_tree.getSelectionModel().setSelectionMode(TreeSelectionModel.CONTIGUOUS_TREE_SELECTION);
m_tree.setAutoscrolls(true);
m_tree.setPreferredSize(new java.awt.Dimension(397, 297));
myPane = new JScrollPane(m_tree);
myPane.setAutoscrolls(true);
myPane.getVerticalScrollBar().setAutoscrolls(true);
add(myPane, BorderLayout.CENTER);
m_tree.addMouseListener(this);
initGUI();
private void initGUI() {
try {
setPreferredSize(new Dimension(400, 300));
} catch (Exception e) {
e.printStackTrace();
public void mouseClicked(MouseEvent e) {
String util = String.format("%f", 6546464642345679801234567980.00 * multi);
util = "abc" + " (" + util + ")";
DefaultMutableTreeNode child = (DefaultMutableTreeNode) parent.getChildAt(0);
child.setUserObject(util);
m_tree.repaint();
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mousePressed(MouseEvent e) {}
public void mouseReleased(MouseEvent e) {}
class ContainerNode extends DefaultMutableTreeNode
private static final long serialVersionUID = 14;
ContainerNode(String s)
{ super(s); }
}Executing this code... clicking in the panel, changes the number.
The new number is displayed as (65464646423456798000000000.000.......
My problem is nearly similar, except that in my code I am using, String.format("%.2f", 6546464642345679801234567980.00 * multi);
and still I get (65...) -
Custom table model, table sorter, and cell renderer to use hidden columns
Hello,
I'm having a hard time figuring out the best way to go about this. I currently have a JTable with an custom table model to make the cells immutable. Furthermore, I have a "hidden" column in the table model so that I can access the items selected from a database by their recid, and then another hidden column that keeps track of the appropriate color for a custom cell renderer.
Subject -- Sender -- Date hidden rec id color
Hello Pete Jan 15, 2003 2900 blue
Basically, when a row is selected, it grabs the record id from the hidden column. This essentially allows me to have a data[][] object independent of the one that is used to display the JTable. Instinctively, this does not seem right, but I don't know how else to do it. I know that the DefaultTableModel uses a Vector even when it's constructed with an array and I've read elsewhere that it's not a good idea to do what I'm trying to do.
The other complication is that I have a table sorter as well. So, when it sorts the objects in the table, I have it recreate the data array and then set the data array of the ImmutableTableModel when it has rearranged all of the items in the array.
On top of this, I have a custom cell renderer as well. This checks yet another hidden field and displays the row accordingly. So, not only does the table sort need to inform the table model of a change in the data structure, but also the cell renderer.
Is there a better way to keep the data in sync between all of these?To the OP, having hidden columns is just fine, I do that all the time.. Nothing says you have to display ALL the info you have..
Now, the column appears to be sorting properly
whenever a new row is added. However, when I attempt
to remove the selected row, it now removes a seemingly
random row and I am left with an unselectable blank
line in my JTable.I have a class that uses an int[] to index the data.. The table model displays rows in order of the index, not the actual order of the data (in my case a Vector of Object[]'s).. Saves a lotta work when sorting..
If you're using a similar indexing scheme: If you're deleting a row, you have to delete the data in the vector at the INDEX table.getSelectedRow(), not the actual data contained at
vector.elementAt(table.getSelectedRow()). This would account for a seemingly 'random' row getting deleted, instead of the row you intend.
Because the row is unselectable, it sounds like you have a null in your model where you should have a row of data.. When you do
vector.removeElementAt(int), the Vector class packs itself. An array does not. If you have an array, when you delete the row you must make sure you dont have that gap.. Make a new array of
(old array length-1), populate it, and give it back to your model.. Using Vectors makes this automatic.
Also, you must make sure your model knows the data changed:
model.fireTableDataChanged(); otherwise it has no idea anything happened..
IDK if that's how you're doing it, but it sounds remarkably similar to what I went thru when I put all this together.. -
Folks,
I have written a small custom defined cell renderer which displays
a list
When the first item is selected,the focus turns to red
When the 2nd item is selected,1 and 2 items turn to red.
(Obviously as I am setting the background to red)
I just need to change the color of the focus element only.
ie when i click the 1st element,focus changes to red.
when i click the 2nd element,only the 2nd element becomes red and not the 1st and 2nd element
class FTRDListCellRenderer extends JLabel implements ListCellRenderer {
private final JLabel label = new JLabel();
label.setOpaque(true);
public Component getListCellRendererComponent(
JList list, Object value,int index,
boolean isSelected, boolean cellHasFocus) {
label.setText(value.toString());
if(isSelected){
label.setBackground(isSelected ? Color.red : Color.yellow);
else{
return label;xpost
http://forum.java.sun.com/thread.jsp?forum=31&thread=490864&tstart=0&trange=15
Maybe you are looking for
-
My laptop, iPad, and iPhone are being clogged by repeated iCal alerts. Every time an event is added, it seems another Calendar is also added. When I view the Calendar list in iCal, there are over 100...and the number is growing. They can not be de
-
Setting up Sharepoint 2013 approval workflows depending on field value
Dear Microsoft Support, I am still relatively new to Sharepoint-Infopath and would need help with setting up workflows for a requisition form I am creating. I have designed and created a form using Infopath 2013 and have successfully created the link
-
How to Run Foms in 10g DS/Application sever
Hi All Dears i need guidence for seting the environment for the 10g DS/application sever to run forms in client server environment because i am switching from 6i to 10g form and database both to run my project in browser environment home will provide
-
Problem with Date Format in a Table.
Hi, I have several views, in each views I have two tables with two fields of date. This data are from an adaptive RFC function exported in Date ABAP format. The webdynpro is showing me the date in mm/dd/yyyy format, and I want to change that to dd/mm
-
To make Truck Number Field Mandatory
Hi, In Delivery creation / Change (VL01N / VL02N), at item level details , we have Extternal Details button, in this we have Truck number. This fields (OIC_TRUCKN) we can find in LISP table. My requirment is to make this field as Mandatory (i.e to m