troubleshooting Question

How to create two directional sortable table in JAVA SWT?

Avatar of Tolgar
Tolgar asked on
ProgrammingJava
3 Comments1 Solution879 ViewsLast Modified:
Hi,
I am working on creating a GUI using Java SWT package and there is a table in this GUI.

I want to be able to sort the items in this table based on certain columns. In order to do this, I use the following code but I have a problem with it.

This code only sorts the columns in one direction.

What I want to do is to sort them in both directions when I click on the column header.


Can you please help me in changing this code to do this?

	            //This is to sort the columns in the table
	            Listener sortListener = new Listener() {
	                public void handleEvent(Event e) {
	                    TableItem[] items = table.getItems();
	                    Collator collator = Collator.getInstance(Locale.getDefault());
	                    TableColumn column = (TableColumn) e.widget;
	                    int index = column == table.getColumn(0) ? 0 : 1;
	                    for (int i = 1; i < items.length; i++) {
	                        String value1 = items[i].getText(index);
	                        for (int j = 0; j < i; j++) {
	                            String value2 = items[j].getText(index);
	                            if (collator.compare(value1, value2) < 0) {
	                                String[] values = { items[i].getText(0),
	                                        items[i].getText(1), items[i].getText(2),
	                                        items[i].getText(3) };
	                                items[i].dispose();
	                                TableItem item = new TableItem(table, SWT.NONE, j);
	                                item.setText(values);
	                                items = table.getItems();
	                                break;
	                            }
	                        }
	                    }
	                    table.setSortColumn(column);
	                }
	            };
	            
	            
	            table.getColumn(1).addListener(SWT.Selection, sortListener);
	            table.getColumn(2).addListener(SWT.Selection, sortListener);
	            table.setSortColumn(table.getColumn(1));
	            table.setSortDirection(SWT.TOP);
	            
	            table.setRedraw(true);
            }
          });
ASKER CERTIFIED SOLUTION
mccarl
IT Business Systems Analyst / Software Developer
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