Function scootOneLabel

src/traces/pie/plot.js:982–1033

(thisPt, prevPt)

    }

    function scootOneLabel(thisPt, prevPt) {
        if (!prevPt) prevPt = {};

        var prevOuterY = prevPt.labelExtraY + (yHalf ? prevPt.yLabelMax : prevPt.yLabelMin);
        var thisInnerY = yHalf ? thisPt.yLabelMin : thisPt.yLabelMax;
        var thisOuterY = yHalf ? thisPt.yLabelMax : thisPt.yLabelMin;
        var thisSliceOuterY = thisPt.cyFinal + farthestY(thisPt.px0[1], thisPt.px1[1]);
        var newExtraY = prevOuterY - thisInnerY;

        var xBuffer, i, otherPt, otherOuterY, otherOuterX, newExtraX;

        // make sure this label doesn't overlap other labels
        // this *only* has us move these labels vertically
        if (newExtraY * yDiffSign > 0) thisPt.labelExtraY = newExtraY;

        // make sure this label doesn't overlap any slices
        if (!Lib.isArrayOrTypedArray(trace.pull)) return; // this can only happen with array pulls

        for (i = 0; i < wholeSide.length; i++) {
            otherPt = wholeSide[i];

            // overlap can only happen if the other point is pulled more than this one
            if (
                otherPt === thisPt ||
                (helpers.castOption(trace.pull, thisPt.pts) || 0) >= (helpers.castOption(trace.pull, otherPt.pts) || 0)
            ) {
                continue;
            }

            if ((thisPt.pxmid[1] - otherPt.pxmid[1]) * yDiffSign > 0) {
                // closer to the equator - by construction all of these happen first
                // move the text vertically to get away from these slices
                otherOuterY = otherPt.cyFinal + farthestY(otherPt.px0[1], otherPt.px1[1]);
                newExtraY = otherOuterY - thisInnerY - thisPt.labelExtraY;

                if (newExtraY * yDiffSign > 0) thisPt.labelExtraY += newExtraY;
            } else if ((thisOuterY + thisPt.labelExtraY - thisSliceOuterY) * yDiffSign > 0) {
                // farther from the equator - happens after we've done all the
                // vertical moving we're going to do
                // move horizontally to get away from these more polar slices

                // if we're moving horz. based on a slice that's several slices away from this one
                // then we need some extra space for the lines to labels between them
                xBuffer = 3 * xDiffSign * Math.abs(i - wholeSide.indexOf(thisPt));

                otherOuterX = otherPt.cxFinal + farthestX(otherPt.px0[0], otherPt.px1[0]);
                newExtraX = otherOuterX + xBuffer - (thisPt.cxFinal + thisPt.pxmid[0]) - thisPt.labelExtraX;

                if (newExtraX * xDiffSign > 0) thisPt.labelExtraX += newExtraX;
            }
        }
    }

    for (yHalf = 0; yHalf < 2; yHalf++) {
        equatorFirst = yHalf ? topFirst : bottomFirst;