I just don't get the spacing options with Qt.

I have a widget and I want to put three buttons at the bottom of the widget. Now, however, the three buttons are taking up all the space along the bottom of the window. I've tried adding spacing, via addSpacing(1) both before and after the buttons, but they still take the full space. I've tried setting the align option on the addWidget() to Qt:AlignCenter to the center one and AlignLeft to the left one and alignRight to the right one. I've tried setting the stretch to -1, but nothing works.

What's the trick?
-BRC