- if (boundaryIdx < 0) return -1;
- for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) {
- var set = this.layout_.datasets[setIdx];
- if (idx < set.length) {
- return this.boundaryIds_[boundaryIdx][0] + idx;
- }
- idx -= set.length;
- }
- return -1;
-};
-
-/**
- * @private
- * Generates legend html dash for any stroke pattern. It will try to scale the
- * pattern to fit in 1em width. Or if small enough repeat the partern for 1em
- * width.
- * @param strokePattern The pattern
- * @param color The color of the series.
- * @param oneEmWidth The width in pixels of 1em in the legend.
- */
-Dygraph.prototype.generateLegendDashHTML_ = function(strokePattern, color, oneEmWidth) {
- var dash = "";
- var i, j, paddingLeft, marginRight;
- var strokePixelLength = 0, segmentLoop = 0;
- var normalizedPattern = [];
- var loop;
- // IE 7,8 fail at these divs, so they get boring legend, have not tested 9.
- var isIE = (/MSIE/.test(navigator.userAgent) && !window.opera);
- if(isIE) {
- return "—";
- }
- if (!strokePattern || strokePattern.length <= 1) {
- // Solid line
- dash = "<div style=\"display: inline-block; position: relative; " +
- "bottom: .5ex; padding-left: 1em; height: 1px; " +
- "border-bottom: 2px solid " + color + ";\"></div>";
- } else {
- // Compute the length of the pixels including the first segment twice,
- // since we repeat it.
- for (i = 0; i <= strokePattern.length; i++) {
- strokePixelLength += strokePattern[i%strokePattern.length];
- }
-
- // See if we can loop the pattern by itself at least twice.
- loop = Math.floor(oneEmWidth/(strokePixelLength-strokePattern[0]));
- if (loop > 1) {
- // This pattern fits at least two times, no scaling just convert to em;
- for (i = 0; i < strokePattern.length; i++) {
- normalizedPattern[i] = strokePattern[i]/oneEmWidth;
- }
- // Since we are repeating the pattern, we don't worry about repeating the
- // first segment in one draw.
- segmentLoop = normalizedPattern.length;
- } else {
- // If the pattern doesn't fit in the legend we scale it to fit.
- loop = 1;
- for (i = 0; i < strokePattern.length; i++) {
- normalizedPattern[i] = strokePattern[i]/strokePixelLength;
- }
- // For the scaled patterns we do redraw the first segment.
- segmentLoop = normalizedPattern.length+1;
- }
- // Now make the pattern.
- for (j = 0; j < loop; j++) {
- for (i = 0; i < segmentLoop; i+=2) {
- // The padding is the drawn segment.
- paddingLeft = normalizedPattern[i%normalizedPattern.length];
- if (i < strokePattern.length) {
- // The margin is the space segment.
- marginRight = normalizedPattern[(i+1)%normalizedPattern.length];
- } else {
- // The repeated first segment has no right margin.
- marginRight = 0;
- }
- dash += "<div style=\"display: inline-block; position: relative; " +
- "bottom: .5ex; margin-right: " + marginRight + "em; padding-left: " +
- paddingLeft + "em; height: 1px; border-bottom: 2px solid " + color +
- ";\"></div>";
- }
- }
- }
- return dash;