Why composite is expanded by text field?

Question

I created a text field which used GridLayout and I set the 3rd parameter of the GridData (grabExcessHorizontalSpace) to true. The Text field is not getting wrap into multiple line when I set a very long sequence of non-whitespace characters won't be split into lines. The Composite is expanded by text filed.

Below is my code:

Composite composite = new Composite(m_shell, SWT.NONE);
composite.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, true));
composite.setLayout(new GridLayout(2, false));

Label label = new Label(composite, SWT.LEAD);
label.setText("Label");
label.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false));

Text text = new Text(composite,SWT.MULTI|SWT.BORDER|SWT.WRAP|SWT.V_SCROLL);
GridData gd = new GridData(SWT.FILL, SWT.CENTER, true, false);
gd.heightHint = 2 * text.getLineHeight();
text.setLayoutData(gd);
text.setText("trweghjfbfdshjfghjreuyhjfghkjhjhjsdghjreewhjdfghjhjgfdhjsdghjtreuytrehjdfghjhjdfgh8irtrhjghjhjdfghjdfghjfghjdfg");

Answer 1

Setting widthHint to 0 together with the horizontalAlignment to SWT.FILL makes the text fill all availible space in its column, but not grow more that that. Instead it wraps as desired:

I tried this on Windows 10 with SWT 3.103.2. Greg seems to have got another result on Mac.

Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new GridLayout());

Composite composite = new Composite(shell, SWT.NONE);
composite.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, true));
composite.setLayout(new GridLayout(2, false));

Label label = new Label(composite, SWT.LEAD);
label.setText("Label");
label.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false));

Text text = new Text(composite, SWT.MULTI | SWT.BORDER | SWT.WRAP | SWT.V_SCROLL);
GridData gd = new GridData(SWT.FILL, SWT.CENTER, true, false);
gd.heightHint = 2 * text.getLineHeight();

// Added widthHint
gd.widthHint = 0;
text.setLayoutData(gd);
text.setText("trweghjfbfdshjfghjreuyhjfghkjhjhjsdghjreewhjdfghjhjgfdhjsdghjtreuytrehjdfghjhjdfgh8irtrhjghjhjdfghjdfghjfghjdfg");

shell.pack();
shell.open();

while (!shell.isDisposed()) {
    if (!display.readAndDispatch()) {
        display.sleep();
    }
}

display.dispose();