How to apply various styles on a Widget depending of some variables?

Question

I want to apply horizontal scroll in a Text widget depending of a variable.

I did it this way:

    int style = (SWT.BORDER | SWT.V_SCROLL | SWT.CANCEL | SWT.MULTI);

    if (!editable) {
        style = (style | SWT.READ_ONLY);
    }

    if (horizontalScroll) {
        style = (style | SWT.H_SCROLL);
    }

    text = new Text(composite, style);

The problem is that horizontal scroll is always present even when horizontalScroll boolean is false. Is not the correct way to do this?

Answer 1

SWT.CANCEL is not a style supported by the SWT Text widget.

You are unlucky in this case because SWT.CANCEL value equals SWT.H_SCROLL so by adding cancel style you are actually adding the horizontal scroll.

Styles supported by SWT Text Widget: CENTER, ICON_CANCEL, ICON_SEARCH, LEFT, MULTI, PASSWORD, SEARCH, SINGLE, RIGHT, READ_ONLY, WRAP.

Styles supported by inheritance: H_SCROLL, V_SCROLL, BORDER, LEFT_TO_RIGHT, RIGHT_TO_LEFT, FLIP_TEXT_DIRECTION

And you should check that there are some rules that some styles can't go together (ex SWT.SINGLE with SWT.MULTI).