Function trellisLayout

docs/app/js/sanddance-app.js:120511–120547

(view, group, opt)

    return bounds;
}
function trellisLayout(view, group, opt) {
    var views = gridLayoutGroups(group), groups = views.marks, bbox = opt.bounds === Flush ? boundFlush : boundFull, off = opt.offset, ncols = opt.columns || groups.length, nrows = ncols <= 0 ? 1 : Math.ceil(groups.length / ncols), cells = nrows * ncols, x, y, x2, y2, anchor, band, offset; // -- initial grid layout
    const bounds = gridLayout(view, groups, opt);
    if (bounds.empty()) bounds.set(0, 0, 0, 0); // empty grid
    // -- layout grid headers and footers --
    // perform row header layout
    if (views.rowheaders) {
        band = get(opt.headerBand, Row, null);
        x = layoutHeaders(view, views.rowheaders, groups, ncols, nrows, -get(off, "rowHeader"), min, 0, bbox, "x1", 0, ncols, 1, band);
    } // perform column header layout
    if (views.colheaders) {
        band = get(opt.headerBand, Column, null);
        y = layoutHeaders(view, views.colheaders, groups, ncols, ncols, -get(off, "columnHeader"), min, 1, bbox, "y1", 0, 1, ncols, band);
    } // perform row footer layout
    if (views.rowfooters) {
        band = get(opt.footerBand, Row, null);
        x2 = layoutHeaders(view, views.rowfooters, groups, ncols, nrows, get(off, "rowFooter"), max, 0, bbox, "x2", ncols - 1, ncols, 1, band);
    } // perform column footer layout
    if (views.colfooters) {
        band = get(opt.footerBand, Column, null);
        y2 = layoutHeaders(view, views.colfooters, groups, ncols, ncols, get(off, "columnFooter"), max, 1, bbox, "y2", cells - ncols, 1, ncols, band);
    } // perform row title layout
    if (views.rowtitle) {
        anchor = get(opt.titleAnchor, Row);
        offset = get(off, "rowTitle");
        offset = anchor === End ? x2 + offset : x - offset;
        band = get(opt.titleBand, Row, 0.5);
        layoutTitle(view, views.rowtitle, offset, 0, bounds, band);
    } // perform column title layout
    if (views.coltitle) {
        anchor = get(opt.titleAnchor, Column);
        offset = get(off, "columnTitle");
        offset = anchor === End ? y2 + offset : y - offset;
        band = get(opt.titleBand, Column, 0.5);
        layoutTitle(view, views.coltitle, offset, 1, bounds, band);
    }
}
function boundFlush(item, field) {
    return field === "x1" ? item.x || 0 : field === "y1" ? item.y || 0 : field === "x2" ? (item.x || 0) + (item.width || 0) : field === "y2" ? (item.y || 0) + (item.height || 0) : undefined;
}