Jeppers + JComboBox

[Neil Gordon]

I tried changing one of the editors on a spreadsheet for a new module I'm working on to be a JComboBox. I used the following code:

ed=new JComboBox();
ed.addItem("hello");
ed.addItem("xxx");
sheet1.setValueAt(ed, 3, 3);
JGrid grid=sheet1.getGrid();
DefaultStyleModel sm=(DefaultStyleModel)grid.getStyleModel();
sm.setEditor(JComboBox.class, new GenericCellEditor(ed));

It works fine for the first time you select the cell & choose a value, however, I suspect then that the cell is becoming a String object, because for second and subsequent edits, the standard text editor is being used.

Any ideas? I tried looking for an easier way to do the above code, but couldn't find one.

Cheers Neil

[Cameron Zemek]

An easy way would be use a custom model for the JComboBox that uses a custom class. Then set the editor for this custom class.

Another way would be to implement a StyleModel that allowed the setting of an editor for specific cells or rows/columns.

[Neil Gordon]

I thought that I was doing this through the code above -   'Then set the editor for this custom class.  ' - it works for the first time the wipes out the editor on the second try.

Will it work if I extend JComboBox for my new class? IE sm.setEditor(MyNewCombo.class, new GenericCellEditor(ed));

I suspect there is something else happening behind the scenes...

[Cameron Zemek]

I was meaning to use a custom ComboBoxModel. However, you can do it with the default model.

Here is an example:
// NOTE: Choice class implements the toString() method
ed=new JComboBox();
ed.addItem(new Choice("ham"));
ed.addItem(new Choice("spam"));
sheet1.setValueAt(c, 3, 3);
JGrid grid=sheet1.getGrid();
DefaultStyleModel sm=(DefaultStyleModel)grid.getStyleModel();
sm.setEditor(Choice.class, new GenericCellEditor(ed));

[Neil Gordon]

Thanks for the example will try it out today and  reportback.

[Neil Gordon]

It worked great.

Here is a complete working example:

.
.
JComboBox ed=new JComboBox(); 
        ed.addItem(new Choice("ham")); 
        ed.addItem(new Choice("spam")); 
        sheet1.setValueAt(new Choice("ham"), 3, 3);
        JGrid grid=sheet1.getGrid(); 
        DefaultStyleModel sm=(DefaultStyleModel)grid.getStyleModel(); 
        sm.setEditor(Choice.class, new GenericCellEditor(ed)); 

.
.
private class Choice {
       
        private String choice;
       
        public Choice(String choice) {
            this.choice=choice;
        }
   
        public String toString() {
            return choice;
        }
    }