$theme.progress {
  border: 0px none;
  .track {
    position: absolute;
    left: 0px;
    right: 0px;
    top: 0px;
    bottom: 0px;
    
    @include slices("progress_view_track.png", $left: 1, $right: 1);
  }
  
  .content {
    position: absolute;
    left: 0px;
    top: 0px;
    bottom: 0px;
    
    /* width set in rendering */
    
    @include slices("progress_view_content.png", $left: 1, $right: 1);
  }
  
  &.disabled {
    opacity: .5;
  }
}