Thread Subject:

To set a column of JTable uneditable?

I have used a JTable on the Matlab GUI, but if I want to make one column of JTable uneditable, it can not use the normal way under Java, that is, to override the isCellEditable() method. Is there any alternative to solve the problem?
Thanks a lot!

"Lihua Pan" <plhalice@gmx.de> wrote in message <gln0em$633$1@fred.mathworks.com>...
> I have used a JTable on the Matlab GUI, but if I want to make one column of JTable uneditable, it can not use the normal way under Java, that is, to override the isCellEditable() method. Is there any alternative to solve the problem?
> Thanks a lot!

hTable.setEditable(colIdx,0); % 0=non-editable; 1=editable

Note: colIdx starts at 1 for Matlab-based hTable handles & 0 for java handles. If you have no clue what I mean then simply try numbers until it works for you (easier than to explain here...)

Yair altman

Hey Yair, thanks very much! Really nice of you!! I've just come back to work, and suddenly see so many replies from you! In fact I've seen your name for many times!
About the reply,

"Yair Altman" <altmanyDEL@gmailDEL.comDEL> wrote in message <gn3p0h$k0q$1@fred.mathworks.com>...
> "Lihua Pan" <plhalice@gmx.de> wrote in message <gln0em$633$1@fred.mathworks.com>...
> > I have used a JTable on the Matlab GUI, but if I want to make one column of JTable uneditable, it can not use the normal way under Java, that is, to override the isCellEditable() method. Is there any alternative to solve the problem?
> > Thanks a lot!
>
> hTable.setEditable(colIdx,0); % 0=non-editable; 1=editable
I've tried this with matlab handle it did work but with javax.swing.JTable there was no appropriate method or public field setEditable. I haven't exactly understand what you mean.


>
> Note: colIdx starts at 1 for Matlab-based hTable handles & 0 for java handles. If you have no clue what I mean then simply try numbers until it works for you (easier than to explain here...)
>
> Yair altman

"Lihua Pan" wrote in message <gln0em$633$1@fred.mathworks.com>...
> I have used a JTable on the Matlab GUI, but if I want to make one column of JTable uneditable, it can not use the normal way under Java, that is, to override the isCellEditable() method. Is there any alternative to solve the problem?
> Thanks a lot!

I am using the same java object in my gui and couldnt find a way to make my table uneditable. In java it is fairly easy, just extending or overriding the DefaultTableModel such that isCellEditable returns false, works beautifully. But how can i do it in Matlab? Is it possible to override? I desperately hope that someone has an answer...
 


Here is a simple code to construct a java table;

> frame=javax.swing.JFrame('table');
> model=javax.swing.table.DefaultTableModel({true,'a';false,'b'},{'lgcl','str'});
>% i need to override "isCellEditable"
> table=javax.swing.JTable(model);
> sorter=javax.swing.table.TableRowSorter(model);
> table.setRowSorter(sorter);
> pane=javax.swing.JScrollPane(table);
> frame.add(pane,java.awt.BorderLayout.CENTER);
> frame.setSize(300,250);
> frame.setVisible(true);

"Arda " <ardaaksu@hotmail.com> wrote in message <j3096q$n9$1@newscl01ah.mathworks.com>...
> "Lihua Pan" wrote in message <gln0em$633$1@fred.mathworks.com>...
> > I have used a JTable on the Matlab GUI, but if I want to make one column of JTable uneditable, it can not use the normal way under Java, that is, to override the isCellEditable() method. Is there any alternative to solve the problem?
> > Thanks a lot!
>
> I am using the same java object in my gui and couldnt find a way to make my table uneditable. In java it is fairly easy, just extending or overriding the DefaultTableModel such that isCellEditable returns false, works beautifully. But how can i do it in Matlab? Is it possible to override? I desperately hope that someone has an answer...


In Java tables there is absolutely no need for extending the model etc. You can simply use jtable.setEditable(columnIndex,true/false) as I have noted above.

In Matlab's uitable (at least the new version that is available since R2008a), use the ColumnEditable property:
http://www.mathworks.com/help/techdoc/ref/uitableproperties.html#brkie07-1

Yair Altman
http://UndocumentedMatlab.com

"Yair Altman" wrote in message <j30r8r$3bj$1@newscl01ah.mathworks.com>...
> In Java tables there is absolutely no need for extending the model etc. You can simply use jtable.setEditable(columnIndex,true/false) as I have noted above.
>
> In Matlab's uitable (at least the new version that is available since R2008a), use the ColumnEditable property:
> http://www.mathworks.com/help/techdoc/ref/uitableproperties.html#brkie07-1
>
> Yair Altman
> http://UndocumentedMatlab.com

Yair, thanks for the reply. I tried both "javax.swing.Jtable" and "com.jidesoft.grid.SortableTable" but neither of them has setEditable method. Which java table are you referring?

I forgot to mention, i dont want to use an uitable. Neither the old one nor the new.. Both have serious disadvantages for me so i need to built it with Java.

"Arda " <ardaaksu@hotmail.com> wrote in message <j30u6j$dus$1@newscl01ah.mathworks.com>...
> I forgot to mention, i dont want to use an uitable. Neither the old one nor the new.. Both have serious disadvantages for me so i need to built it with Java.

Here is a simple solution that works with *ALL* java-based tables in Matlab - both the old and the new uitable, as well as plain-ol'-JTable:

  ce = javax.swing.DefaultCellEditor(javax.swing.JTextField);
  ce.setClickCountToStart(intmax); % =never...
  jTable.getColumnModel.getColumn(columnIndex).setCellEditor(ce);

where columnIndex starts at 0 for the left-most column (as is normal for Java indices).

Yair Altman
http://UndocumentedMatlab.com

"Yair Altman" wrote in message <j3jtqd$2cr$1@newscl01ah.mathworks.com>...
> Here is a simple solution that works with *ALL* java-based tables in Matlab - both the old and the new uitable, as well as plain-ol'-JTable:
>
> ce = javax.swing.DefaultCellEditor(javax.swing.JTextField);
> ce.setClickCountToStart(intmax); % =never...
> jTable.getColumnModel.getColumn(columnIndex).setCellEditor(ce);
>
> where columnIndex starts at 0 for the left-most column (as is normal for Java indices).
>
> Yair Altman
> http://UndocumentedMatlab.com

@Yair, thanks for the reply. However your solution is not a complete one. With it it can be prevented to get in the cell but table is still editable with a key press. Actually following code is more appropriate;
 
 sclass=java.lang.String('').getClass;
 renderer=table.getDefaultRenderer(sclass);
 editor=table.getDefaultEditor(sclass);
 editor.getComponent.setEditable(0);
 editor.setClickCountToStart(20);
 table.getColumnModel.getColumn(0).setCellRenderer(renderer)
 table.getColumnModel.getColumn(0).setCellEditor(editor)

But, unfortunately but, even though table can be made uneditable with this approach, when a keyboard key is pressed selected cell changes color.

Anyway, this is something right? :)