Function aroFromParams

test/jasmine/assets/domain_ref_components.js:168–211

(arotype, x0, y0, xref, yref, color, opts)

// images take xsize, ysize, xanchor, yanchor (sizing is set to stretch for simplicity
// in computing the bounding box and source is something predetermined)
function aroFromParams(arotype, x0, y0, xref, yref, color, opts) {
    // fill with common values
    var aro = {
        xref: xref,
        yref: yref
    };
    switch(arotype) {
        case 'shape':
            aro.x0 = x0;
            aro.y0 = y0;
            aro.x1 = opts.x1;
            aro.y1 = opts.y1;
            aro.type = opts.type;
            aro.line = {
                color: color
            };
            break;
        case 'annotation':
            aro.x = x0;
            aro.y = y0;
            aro.text = 'A';
            aro.ax = opts.ax;
            aro.ay = opts.ay;
            aro.axref = opts.axref;
            aro.ayref = opts.ayref;
            aro.showarrow = true;
            aro.arrowhead = 0;
            aro.arrowcolor = color;
            break;
        case 'image':
            aro.x = x0;
            aro.y = y0;
            aro.sizex = opts.sizex;
            aro.sizey = opts.sizey;
            aro.xanchor = opts.xanchor;
            aro.yanchor = opts.yanchor;
            aro.sizing = 'stretch';
            aro.source = testImage;
            break;
        default:
            throw 'Bad arotype: ' + arotype;
    }
    return aro;
}

// Calculate the ax value of an annotation given a particular desired scaling K
// This also works with log axes by taking logs of each part of the sum, so that