topComp.setLayout(topLayout);
outputField.doFillIntoGrid(topComp, 3);
webappDirField.doFillIntoGrid(topComp, 3);
PixelConverter converter = new PixelConverter(topComp);
LayoutUtil.setWidthHint(
outputField.getTextControl(null),
converter.convertWidthInCharsToPixels(NB_VISIBLE_CHARS));
LayoutUtil.setHorizontalGrabbing(outputField.getTextControl(null));
Control libraryPageControl = libraryPage.getControl(topComp);
GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
gd.horizontalSpan = 3;