Function drawGraphicalElements

src/components/annotations/draw.js:261–735

()

    }

    function drawGraphicalElements() {
        // if the text has *only* a link, make the whole box into a link
        var anchor3 = annText.selectAll('a');
        if(anchor3.size() === 1 && anchor3.text() === annText.text()) {
            var wholeLink = annTextGroupInner.insert('a', ':first-child').attr({
                'xlink:xlink:href': anchor3.attr('xlink:href'),
                'xlink:xlink:show': anchor3.attr('xlink:show')
            })
            .style({cursor: 'pointer'});

            wholeLink.node().appendChild(annTextBG.node());
        }

        var mathjaxGroup = annTextGroupInner.select('.annotation-text-math-group');
        var hasMathjax = !mathjaxGroup.empty();
        var anntextBB = Drawing.bBox(
                (hasMathjax ? mathjaxGroup : annText).node());
        var textWidth = anntextBB.width;
        var textHeight = anntextBB.height;
        var annWidth = options.width || textWidth;
        var annHeight = options.height || textHeight;
        var outerWidth = Math.round(annWidth + 2 * borderfull);
        var outerHeight = Math.round(annHeight + 2 * borderfull);

        function shiftFraction(v, anchor) {
            if(anchor === 'auto') {
                if(v < 1 / 3) anchor = 'left';
                else if(v > 2 / 3) anchor = 'right';
                else anchor = 'center';
            }
            return {
                center: 0,
                middle: 0,
                left: 0.5,
                bottom: -0.5,
                right: -0.5,
                top: 0.5
            }[anchor];
        }

        var annotationIsOffscreen = false;
        var letters = ['x', 'y'];

        for(var i = 0; i < letters.length; i++) {
            var axLetter = letters[i];
            var axRef = options[axLetter + 'ref'] || axLetter;
            var tailRef = options['a' + axLetter + 'ref'];
            var ax = {x: xa, y: ya}[axLetter];
            var dimAngle = (textangle + (axLetter === 'x' ? 0 : -90)) * Math.PI / 180;
            // note that these two can be either positive or negative
            var annSizeFromWidth = outerWidth * Math.cos(dimAngle);
            var annSizeFromHeight = outerHeight * Math.sin(dimAngle);
            // but this one is the positive total size
            var annSize = Math.abs(annSizeFromWidth) + Math.abs(annSizeFromHeight);
            var anchor = options[axLetter + 'anchor'];
            var overallShift = options[axLetter + 'shift'] * (axLetter === 'x' ? 1 : -1);
            var posPx = annPosPx[axLetter];
            var basePx;