Change background color of a table based on table cell values quickly.

Is there a more effecient way to change the background color of a table based on the cell values of the table?
I can do this cell-by-cell using the property node, but it is very slow. It helps a little by deferring panel update, but it is still slow. Is there a better way?
Thanks.
Ian

If you want to color each cell according to the value, you need to do it one cell at a time and the above answers don't apply.
You can dramatically speed up things by defering front panel updates for the duration of the operation.
(sample code can be seen in the top picture here)
EDIT: I noticed you tried this already. Can you show us your code?
How many cells need to be colored on average? If there are not that many, first write the background color using -2,-2, the only write the few cells to be colored, skipping the rest.
How big is the table? If it is much bigger than the table indicator, all you need is to color the visible parts whenever the data or the scroll position changes.
LabVIEW Champion . Do more with less code and in less time .

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Hello,
How do I change the background color of a row in a table indicator? I know how to change the background color in a active cell, but that is not what I want. My first intent is to make the background color of the first row a unique color, such as green, just to highlight the top row of the table.
Regards,
Kaspar
Regards,
Kaspar

I have done this before by using a for loop to change the active cell of a row in order to give the appearance that the whole row is turning the color at once.
CLA, CLED, CTD,CPI, LabVIEW Champion
Platinum Alliance Partner
Senior Engineer
Using LV 2013, 2012
Don't forget Kudos for Good Answers, and Mark a solution if your problem is solved.

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Hello,
I have a 10g master - detail form. I was wondering how can I change background color of text box (NAME) based on non-visivle item (MODIFIED_BY) value.
So far, I have created two visual attributes and have put following code on "WHEN_NEW_BLOCK_INSTANCE" trigger
if( :main.MODIFIED_BY = 'COCO') then
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else
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Thanks.

Got it.
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Hi!
How can I change background color cell/table in Sapscript?
Thanks very much!

Hi ,
Normally we use Scripts and smartforms for submitting the output to customers or for tax purpose and so on,,in such case we wont submit in differnt color other than white and black,so formatting in other colors is not possible in Script and smartforms.
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It is relatively straightforward to give a pattern of color to rows in a dataTable control, for instance to alternate colors from white to gray.
However, I have not yet figured how the row background color could be decided based on data fields associated with each row. For instance, I would like to set the row background color based on the value of a boolean attribute associated with the row, e.g. white if value is false and gray if it is true.
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of the text, but not the whole cell. I need to find a
way to change the span at the row level (on the <tr>
tag). ANy ways to do this?
MartinThis is a question of how to let the renderer adjust its behaviour depending on the current state of the model. My renderer changes the background for the selected row by changing the style class:
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Changing background color in JTable, only changes one row at a time...

I'm trying to change the color of rows when the 5th column meets certain criteria. I think I'm very close, but I've hit a wall.
What's happening is the row will change color as intended when the text in the 5th column is "KEY WORD", but when I type "KEY WORD" in a different column it will set the first row back to the regular colors. I can easily see why it's doing this, everytime something is changed it rerenders every cell, and the listener only checks the cell that was just changed if it met the "KEY WORD" condition, so it sets every cell (including the previous row that still meets the condition) to the normal colors. I can't come up with a good approach to changing the color for ALL rows that meet the condition. Any help would be appreciated.
In this part of the CellRenderer:
        if (isSelected)
            color = Color.red;
        else
            color = Color.blue;
        if (hasFocus)
            color = Color.yellow;
        //row that meets special conditions
        if(row == specRow && col == specCol)
            color = color.white; I was thinking an approach would be to set them to their current color except for the one that meets special conditions, but the two problems with that are I can't figure out how to getColor() from the table, and I'm not sure how I would initially set the colors.
Here's the rest of the relevant code:
    public void tableChanged(TableModelEvent e)
        int firstRow = e.getFirstRow();
        int lastRow = e.getLastRow();
        int colIndex = e.getColumn();
        if(colIndex == 4)
            String value = (String)centerTable.getValueAt(firstRow, colIndex);
            // check for our special selection criteria
            if(value.equals("KEY WORD"))
                for(int j = 0; j < centerTable.getColumnCount(); j++)
                    CellRenderer renderer =
                        (CellRenderer)centerTable.getCellRenderer(firstRow, j);
                    renderer.setSpecialSelection(firstRow, j);
import javax.swing.table.*;
import javax.swing.*;
import java.awt.Component;
import java.awt.Color;
public class CellRenderer extends DefaultTableCellRenderer
    int specRow, specCol;
    public CellRenderer()
        specRow = -1;
        specCol = -1;
    public Component getTableCellRendererComponent(JTable table,
                                                   Object value,
                                                   boolean isSelected,
                                                   boolean hasFocus,
                                                   int row, int col)
        setHorizontalAlignment(JLabel.CENTER);
        Color color = Color.green;
        if (isSelected)
            color = Color.red;
        else
            color = Color.blue;
        if (hasFocus)
            color = Color.yellow;
        if(row == specRow && col == specCol)
            color = color.white;
        //setForeground(color);
        setBackground(color);
        setText((String)value);
        return this;
    public void setSpecialSelection(int row, int col)
        specRow = row;
        specCol = col;
}If I'm still stuck and more of my code is needed, I'll put together a smaller program that will isolate the problem tomorrow.

That worked perfectly for what I was trying to do, but I've run into another problem. I'd like to change the row height when the conditions are met. What I discovered is that this creates an infinite loop since the resizing triggers the renderer, which resizes the row again, etc,. What would be the proper way to do this?
Here's the modified code from the program given in the link. All I did was declare the table for the class, and modify the if so I could add the "table.setRowHeight(row, 30);" line.
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.border.*;
public class TableRowRenderingTip extends JPanel
    JTable table;
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        Object[] columnNames = {"Type", "Company", "Shares", "Price", "Boolean"};
        Object[][] data =
            {"Buy", "IBM", new Integer(1000), new Double(80.5), Boolean.TRUE},
            {"Sell", "Dell", new Integer(2000), new Double(6.25), Boolean.FALSE},
            {"Short Sell", "Apple", new Integer(3000), new Double(7.35), Boolean.TRUE},
            {"Buy", "MicroSoft", new Integer(4000), new Double(27.50), Boolean.FALSE},
            {"Short Sell", "Cisco", new Integer(5000), new Double(20), Boolean.TRUE}
        DefaultTableModel model = new DefaultTableModel(data, columnNames)
            public Class getColumnClass(int column)
                return getValueAt(0, column).getClass();
        JTabbedPane tabbedPane = new JTabbedPane();
        tabbedPane.addTab("Alternating", createAlternating(model));
        tabbedPane.addTab("Border", createBorder(model));
        tabbedPane.addTab("Data", createData(model));
        add( tabbedPane );
    private JComponent createAlternating(DefaultTableModel model)
        JTable table = new JTable( model )
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
                Component c = super.prepareRenderer(renderer, row, column);
                // Alternate row color
                if (!isRowSelected(row))
                    c.setBackground(row % 2 == 0 ? getBackground() : Color.LIGHT_GRAY);
                return c;
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        table.changeSelection(0, 0, false, false);
        return new JScrollPane( table );
    private JComponent createBorder(DefaultTableModel model)
        JTable table = new JTable( model )
            private Border outside = new MatteBorder(1, 0, 1, 0, Color.RED);
            private Border inside = new EmptyBorder(0, 1, 0, 1);
            private Border highlight = new CompoundBorder(outside, inside);
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
                Component c = super.prepareRenderer(renderer, row, column);
                JComponent jc = (JComponent)c;
                // Add a border to the selected row
                if (isRowSelected(row))
                    jc.setBorder( highlight );
                return c;
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        table.changeSelection(0, 0, false, false);
        return new JScrollPane( table );
    public JComponent createData(DefaultTableModel model)
        table = new JTable( model )
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
                Component c = super.prepareRenderer(renderer, row, column);
                // Color row based on a cell value
                if (!isRowSelected(row))
                    c.setBackground(getBackground());
                    String type = (String)getModel().getValueAt(row, 0);
                    if ("Buy".equals(type)) {
                        table.setRowHeight(row, 30);
                        c.setBackground(Color.GREEN);
                    if ("Sell".equals(type)) c.setBackground(Color.YELLOW);
                return c;
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        table.changeSelection(0, 0, false, false);
        return new JScrollPane( table );
    public static void main(String[] args)
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
    public static void createAndShowGUI()
        JFrame.setDefaultLookAndFeelDecorated(true);
        JFrame frame = new JFrame("Table Row Rendering");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add( new TableRowRenderingTip() );
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
}Edited by: scavok on Apr 26, 2010 6:43 PM

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http://mariusht.com/blog/

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hi
How To Change background Color of the Text.
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DECLARE
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Hi everyone,
I am trying to Change background color in enter-query mode in forms10g. I am using this
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Thanks

This is the code that allows to colorise items in enter_query mode, then de-colorize them after execute_query.
Assume that you have created a VA_QUERY visual atribute in your module.
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PROCEDURE Start_query IS
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LC$item       varchar2(60);
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LN$len        pls_integer ;
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while lc$itemdeb is not null Loop
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LC$Block     Varchar2(30) := Name_in('system.trigger_block') ;
LC$item     varchar2(60);
LC$itemdeb     varchar2(60);
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LN$Multi pls_integer ;
BEGIN
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HI guys,
I have a question:
In the Form 6I exists a Text Item with own scrollbar.
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Thanks in advance,
John.
Message was edited by:
IMJL

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Change background color of a table based on table cell values quickly.

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