X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;ds=sidebyside;f=dygraph.js;h=f82285b73f56fd65f93d25e490545ab6be8b4b71;hb=0755e27d80c9d4c7dffbeaded74b545d71c11466;hp=4502bd41f72f101111316f5f52c82a146f404888;hpb=cdcb628b3219ffc94666f424256df33d4401286c;p=dygraphs.git

diff --git a/dygraph.js b/dygraph.js
index 4502bd4..f82285b 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -3602,19 +3602,25 @@ Dygraph.prototype.visibility = function() {
 };
 
 /**
- * Changes the visiblity of a series.
+ * Changes the visibility of one or more series.
  *
- * @param {number} num the series index
+ * @param {number|number[]} num the series index or an array of series indices
  * @param {boolean} value true or false, identifying the visibility.
  */
 Dygraph.prototype.setVisibility = function(num, value) {
   var x = this.visibility();
-  if (num < 0 || num >= x.length) {
-    console.warn("invalid series number in setVisibility: " + num);
-  } else {
-    x[num] = value;
-    this.predraw_();
+
+  if (num.constructor !== Array) num = [num];
+
+  for (var i = 0; i < num.length; i++) {
+    if (num[i] < 0 || num[i] >= x.length) {
+      console.warn("invalid series number in setVisibility: " + num[i]);
+    } else {
+      x[num[i]] = value;
+    }
   }
+
+  this.predraw_();
 };
 
 /**
@@ -3677,6 +3683,35 @@ Dygraph.prototype.indexFromSetName = function(name) {
 };
 
 /**
+ * Find the row number corresponding to the given x-value.
+ * Returns null if there is no such x-value in the data.
+ * If there are multiple rows with the same x-value, this will return the
+ * first one.
+ * @param {number} xVal The x-value to look for (e.g. millis since epoch).
+ * @return {?number} The row number, which you can pass to getValue(), or null.
+ */
+Dygraph.prototype.getRowForX = function(xVal) {
+  var low = 0,
+      high = this.numRows() - 1;
+
+  while (low <= high) {
+    var idx = (high + low) >> 1;
+    var x = this.getValue(idx, 0);
+    if (x < xVal) {
+      low = idx + 1;
+    } else if (x > xVal) {
+      high = idx - 1;
+    } else if (low != idx) {  // equal, but there may be an earlier match.
+      high = idx;
+    } else {
+      return idx;
+    }
+  }
+
+  return null;
+};
+
+/**
  * Trigger a callback when the dygraph has drawn itself and is ready to be
  * manipulated. This is primarily useful when dygraphs has to do an XHR for the
  * data (i.e. a URL is passed as the data source) and the chart is drawn