var mouseMoveHandler = function()

in assets/scripts/api.simile-widgets.org/timeplot/1.1/scripts/plot.js [68:186]
114 lines of code
18 McCabe index (conditional complexity)

            var mouseMoveHandler = function(elmt, evt, target) {
                if (typeof SimileAjax != "undefined" && plot._plotInfo.showValues) {
                    var c = plot._canvas;
                    var x = Math.round(SimileAjax.DOM.getEventRelativeCoordinates(evt,plot._canvas).x);
                    if (x > c.width) x = c.width;
                    if (isNaN(x) || x < 0) x = 0;
                    var t = plot._timeGeometry.fromScreen(x);
                    if (t == 0) { // something is wrong
                        plot._valueFlag.style.display = "none";
                        return;
                    }
                    
                    var validTime = plot._dataSource.getClosestValidTime(t);
                    x = plot._timeGeometry.toScreen(validTime);
                    var v = plot._dataSource.getValue(validTime);
                    if (plot._plotInfo.roundValues) v = Math.round(v);
                    plot._valueFlag.innerHTML = new String(v);
                    var d = new Date(validTime);
                    var p = plot._timeGeometry.getPeriod(); 
                    if (p < day) {
                        plot._timeFlag.innerHTML = d.toLocaleTimeString();
                    } else if (p > month) {
                        plot._timeFlag.innerHTML = d.toLocaleDateString();
                    } else {
                        plot._timeFlag.innerHTML = d.toLocaleString();
                    }

                    var tw = plot._timeFlag.clientWidth;
                    var th = plot._timeFlag.clientHeight;
                    var tdw = Math.round(tw / 2);
                    var vw = plot._valueFlag.clientWidth;
                    var vh = plot._valueFlag.clientHeight;
                    var y = plot._valueGeometry.toScreen(v);

                    if (x + tdw > c.width) {
                        var tx = c.width - tdw;
                    } else if (x - tdw < 0) {
                        var tx = tdw;
                    } else {
                        var tx = x;
                    }

                    if (plot._timeGeometry._timeValuePosition == "top") {
                        plot._timeplot.placeDiv(plot._valueFlagPole, {
                            left: x,
                            top: th - 5,
                            height: c.height - y - th + 6,
                            display: "block"
                        });
                        plot._timeplot.placeDiv(plot._timeFlag,{
                            left: tx - tdw,
                            top: -6,
                            display: "block"
                        });
                    } else {
                        plot._timeplot.placeDiv(plot._valueFlagPole, {
                            left: x,
                            bottom: th - 5,
                            height: y - th + 6,
                            display: "block"
                        });
                        plot._timeplot.placeDiv(plot._timeFlag,{
                            left: tx - tdw,
                            bottom: -6,
                            display: "block"
                        });
                    }

                    if (x + vw + 14 > c.width && y + vh + 4 > c.height) {
                        plot._valueFlagLineLeft.style.display = "none";
                        plot._timeplot.placeDiv(plot._valueFlagLineRight,{
                            left: x - 14,
                            bottom: y - 14,
                            display: "block"
                        });
                        plot._timeplot.placeDiv(plot._valueFlag,{
                            left: x - vw - 13,
                            bottom: y - vh - 13,
                            display: "block"
                        });
                    } else if (x + vw + 14 > c.width && y + vh + 4 < c.height) {
                        plot._valueFlagLineRight.style.display = "none";
                        plot._timeplot.placeDiv(plot._valueFlagLineLeft,{
                            left: x - 14,
                            bottom: y,
                            display: "block"
                        });
                        plot._timeplot.placeDiv(plot._valueFlag,{
                            left: x - vw - 13,
                            bottom: y + 13,
                            display: "block"
                        });
                    } else if (x + vw + 14 < c.width && y + vh + 4 > c.height) {
                        plot._valueFlagLineRight.style.display = "none";
                        plot._timeplot.placeDiv(plot._valueFlagLineLeft,{
                            left: x,
                            bottom: y - 13,
                            display: "block"
                        });
                        plot._timeplot.placeDiv(plot._valueFlag,{
                            left: x + 13,
                            bottom: y - 13,
                            display: "block"
                        });
                    } else {
                        plot._valueFlagLineLeft.style.display = "none";
                        plot._timeplot.placeDiv(plot._valueFlagLineRight,{
                            left: x,
                            bottom: y,
                            display: "block"
                        });
                        plot._timeplot.placeDiv(plot._valueFlag,{
                            left: x + 13,
                            bottom: y + 13,
                            display: "block"
                        });
                    }
                }
            }