.#{$prefix}grid-cell-checkcolumn .#{$prefix}grid-cell-inner { // !important needed to override .x-tree-panel .x-grid-cell-inner's padding setting. padding-top: floor(($grid-row-height - $grid-cell-border-width - $form-checkbox-size) / 2)!important; padding-bottom: 0!important; } .#{$prefix}grid-checkcolumn { width: $form-checkbox-size; height: $form-checkbox-size; background: theme-background-image($form-checkbox-image) 0 0 no-repeat; .#{$prefix}item-disabled & { @include opacity($grid-checkcolumn-disabled-opacity); } } .#{$prefix}grid-checkcolumn-checked { background-position: 0 (0 - $form-checkbox-size); }