/** Opens the dialog and returns the input string or null if the dialog was canceled. */
public String open() {
Util.setCenteredMinBounds(shell, 300, 150);
shell.open();
if (selectFilenameOnly) {
String s = text.getText();
int index = s.lastIndexOf('.');
if (index != -1) text.setSelection(new Point(0, index));
else text.setSelection(new Point(0, text.getText().length()));
} else {
text.setSelection(new Point(0, text.getText().length()));
}
while (!shell.isDisposed()) {
if (!shell.getDisplay().readAndDispatch()) shell.getDisplay().sleep();
}
return answer;
}
