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Article #90

Help to solve flickering Checkbox in JTable

#90
From: Ben Munday
Date: Thu, 15 Jan 2004 04:14
41 lines
2843 bytes
Hi all,
	I have a problem with a Checkbox in a JTable.
When i add the Checkbox into the JTable it displays the String 
representation of the Checkbox, which is not what i want.
So, i created a CheckBoxRenderer which extens Checkbox and implements 
TableCellRenderer. This seems to have done the job, in that the Checkbox 
is displayed and not the String representation. But, and it's a big 
'but', the column that holds the Checkbox continually updates the 
fields. I cannot select the Checkbox and i can only just see that the 
correct info for the Checkbox is in the cell.
I think it has something to do with repainting the Checkbox, but i can't 
figure out how to stop it from happening.

Here is some of the code, the bit's i think are relevent:
All code is at:
http://www.users.on.net/benmunday/Label/



public class CheckBoxRenderer extends Checkbox implements TableCellRenderer
{

...

     public Component getTableCellRendererComponent(JTable table, Object 
cBox, boolean isSelected, boolean hasFocus, int row, int column)
     {
	    Checkbox newCheckbox = (Checkbox)cBox;
	    newCheckbox.setState(false);
	    return newCheckbox;
     }
}

	JTable itemDataTable = new JTable(new MyTableModel(data));
	itemDataTable.setDefaultRenderer(data[0][0].getClass(), new 						 
CheckBoxRenderer());

	itemDataScrollPane.getViewport().setView(itemDataTable);
	itemDataScrollPane.setVisible(true);

	contentPane.add(itemDataScrollPane,  BorderLayout.CENTER);
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Date: Thu, 15 Jan 2004 15:14:56 +1100
From: Ben Munday <benny111@hotmail.com>
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Subject: Help to solve flickering Checkbox in JTable
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