How to fill a ScrolledComposite?

Question

I have a class extending from ScrolledComposite, within this class I have created a Composite which is intended to fill the parent ScrolledComposite. But whenever I add labels to the inner composite it wraps to the upper right corner only. I want my inner Composite to completely fill the outer ScrolledComposite. Is there a way to do this?

    public class Container extends ScrolledComposite {

    final Composite comp;
    Label nameLabel, sizeLabel, dateLabel;
    ArrayList<Label> entrySize, date;
    ArrayList<SimpleEntry> entry;
    Color white;
    Font font;

    public Container(Composite parent, int style) {
        super(parent, style);
        white = new Color(getDisplay(), 255, 255, 255);
        font = new Font(getDisplay(), "Arial", 16, SWT.BOLD);
        setBackground(white);
        setLayout(new GridLayout(1, false));

        comp = new Composite(this, SWT.BORDER);
        GridData compData = new GridData(SWT.FILL, SWT.FILL, true, true);
        comp.setLayoutData(compData);
        setContent(comp);
        comp.setBackground(white);
        comp.setLayout(new GridLayout(3, false));

        nameLabel = new Label(comp, SWT.BOLD);
        sizeLabel = new Label(comp, SWT.BOLD);
        dateLabel = new Label(comp, SWT.BOLD);

        GridData d1 = new GridData(SWT.CENTER, SWT.CENTER, true, false);
        nameLabel.setLayoutData(d1);

        GridData d2 = new GridData(SWT.CENTER, SWT.CENTER, true, false);
        sizeLabel.setLayoutData(d2);

        GridData d3 = new GridData(SWT.CENTER, SWT.CENTER, true, false);
        dateLabel.setLayoutData(d3);

        nameLabel.setBackground(white);
        sizeLabel.setBackground(white);
        dateLabel.setBackground(white);

        nameLabel.setText("Name");
        sizeLabel.setText("Size");
        dateLabel.setText("Last Modified");

        nameLabel.setFont(font);
        sizeLabel.setFont(font);
        dateLabel.setFont(font);

        comp.setSize(comp.computeSize(SWT.DEFAULT, SWT.DEFAULT));
        comp.layout();

        addDisposeListener(new DisposeListener() {
            @Override
            public void widgetDisposed(DisposeEvent e) {
                Container.this.widgetDisposed(e);
            }
        });
    }
}

Answer 1

Just add these lines at the end of the constructor:

this.setMinSize(comp.computeSize(SWT.DEFAULT, SWT.DEFAULT));
this.setExpandHorizontal(true);
this.setExpandVertical(true);

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Notes:

• Remember to dispose() all resources you create yourself (Color, Font, ...)
• Consider using system resources (no need to dispose) by using display.getSystemColor(SWT.COLOR_WHITE) and display.getSystemFont().