How to permanantly set a custom CellRenderer to a jTable?

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2 total messages Started by Zoran Pjevic Thu, 11 Dec 2003 14:36

#1485

Author: Zoran Pjevic
Date: Thu, 11 Dec 2003 14:36

42 lines
2293 bytes

Following situtation:

I am using a jtable with a custom tablemodel, custom cellrenderer.

The table displays dynamic data coming from an external source.

I attach the the cell renderer to the table and set up the columns
widths as follows:

MyTableModel tableModel = new MyTableModel();
JTable table = new JTable(tableModel);
JViewport tableViewport = jScrollPane_PcmTelemetry.getViewport();
tableViewport.add(table, null);

for (int i=0; i < table.getColumnCount(); i++) {
      table.setDefaultRenderer(jTablePcmTelemetry.getColumnClass(i),
new MyCellRenderer());
}

table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
TableColumnModel tableColumnModel = table.getColumnModel();
for (int i=0; i < tableColumnModel.getColumnCount(); i++) {
	tableColumnModel.getColumn(i).setPreferredWidth(35);
}

But then when new data comes the TableModel calls either
 fireTableStructureChanged(), fireTableDataChanged() or
fireTableRowsUpdated(0, size-1)
depending on what has changed in the data.

After this I loose the CellRenderers and the Width of the Columns, ie.
there set back to the default ones.

How can I set a Custom Cell Renderer permanently or set the width of
the columns permanently so that they 
will survive any of the previous mentioned events?

I'll be grateful for any help on this.

Regards,
Zoran

Re: How to permanantly set a custom CellRenderer to a jTable?

#1488

Author: Paul Furbacher
Date: Thu, 11 Dec 2003 20:00

40 lines
2436 bytes

Zoran Pjevic wrote:

> But then when new data comes the TableModel calls either
> fireTableStructureChanged(), fireTableDataChanged() or
> fireTableRowsUpdated(0, size-1) ....
> 
> After this I loose the CellRenderers and the Width of the Columns, ie.
> there set back to the default ones.
> 
> How can I set a Custom Cell Renderer permanently or set the width of
> the columns permanently so that they 
> will survive any of the previous mentioned events?

You'll notice that JTable's implementation recreates the
columns based on the value of "autoCreateColumnsFromModel".
The field is set to true in the constructor.

As I see it, you have two choices.

Try setting that field to false via its accessor.

Or, if that doesn't work to your satisfaction,
extend JTable and override the "tableChanged()"
method to do what you want.

-- 

Paul Furbacher (TeamB)

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