9.15. Creating Table Columns
Problem
You need to add some columns to your SWT table widgets.
Solution
Create TableColumn
objects, one for each column,
passing the Table
object you’re
working with to the TableColumn
constructor. Then
create TableItem
objects, setting the text for
each column individually.
Discussion
To add columns to an SWT table, you start by turning on headers in the table:
Table table = new Table(shell, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
table.setHeaderVisible (true);
You can then create columns using TableColumn
objects. In this example, we’ll add four columns:
String[] titles = {"Col 1", "Col 2", "Col 3", "Col 4"}; for (int loopIndex = 0; loopIndex < titles.length; loopIndex++) { TableColumn column = new TableColumn(table, SWT.NULL); column.setText(titles[loopIndex]); }
When you stock the table with items, you also set the text for each column, passing the column number as well as the text to use:
for (int loopIndex=0; loopIndex < 24; loopIndex++) { TableItem item = new TableItem (table, SWT.NULL); item.setText(0, "Item " + loopIndex); item.setText(1, "Yes"); item.setText(2, "No"); item.setText(3, "A table item"); }
We’ll also pack the columns to adjust them to the width of the text they contain:
for (int loopIndex = 0; loopIndex <titles.length; loopIndex++) { table.getColumn(loopIndex).pack( ); }
And that’s it; you can see the results in Figure 9-10. When you select an item, the application indicates which item you selected.
Figure 9-10. A multicolumn table
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