Merge branch 'master' of http://github.com/danvk/dygraphs

[dygraphs.git] / dygraph.js

diff --git a/dygraph.js b/dygraph.js
index ca935a1..40a43c8 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -37,7 +37,7 @@
 
  And error bars will be calculated automatically using a binomial distribution.
 
- For further documentation and examples, see http://www.danvk.org/dygraphs
+ For further documentation and examples, see http://dygraphs.com/
 
  */
 
@@ -192,6 +192,10 @@ Dygraph.prototype.__init__ = function(div, file, attrs) {
   this.is_initial_draw_ = true;
   this.annotations_ = [];
 
+  // Zoomed indicators - These indicate when the graph has been zoomed and on what axis.
+  this.zoomed_x_ = false;
+  this.zoomed_y_ = false;
+
   // Clear the div. This ensure that, if multiple dygraphs are passed the same
   // div, then only one will be drawn.
   div.innerHTML = "";
@@ -254,6 +258,14 @@ Dygraph.prototype.__init__ = function(div, file, attrs) {
   this.start_();
 };
 
+// axis is an optional parameter. Can be set to 'x' or 'y'.
+Dygraph.prototype.isZoomed = function(axis) {
+  if (axis == null) return this.zoomed_x_ || this.zoomed_y_;
+  if (axis == 'x') return this.zoomed_x_;
+  if (axis == 'y') return this.zoomed_y_;
+  throw "axis parameter to Dygraph.isZoomed must be missing, 'x' or 'y'.";
+};
+
 Dygraph.prototype.attr_ = function(name, seriesName) {
   if (seriesName &&
       typeof(this.user_attrs_[seriesName]) != 'undefined' &&
@@ -1084,10 +1096,10 @@ Dygraph.prototype.doZoomX_ = function(lowX, highX) {
  */
 Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) {
   this.dateWindow_ = [minDate, maxDate];
+  this.zoomed_x_ = true;
   this.drawGraph_();
   if (this.attr_("zoomCallback")) {
-    var yRange = this.yAxisRange();
-    this.attr_("zoomCallback")(minDate, maxDate, yRange[0], yRange[1]);
+    this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges());
   }
 };
 
@@ -1112,10 +1124,12 @@ Dygraph.prototype.doZoomY_ = function(lowY, highY) {
     valueRanges.push([low[1], hi[1]]);
   }
 
+  this.zoomed_y_ = true;
   this.drawGraph_();
   if (this.attr_("zoomCallback")) {
     var xRange = this.xAxisRange();
-    this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges());
+    var yRange = this.yAxisRange();
+    this.attr_("zoomCallback")(xRange[0], xRange[1], yRange[0], yRange[1]);
   }
 };
 
@@ -1142,6 +1156,8 @@ Dygraph.prototype.doUnzoom_ = function() {
   if (dirty) {
     // Putting the drawing operation before the callback because it resets
     // yAxisRange.
+    this.zoomed_x_ = false;
+    this.zoomed_y_ = false;
     this.drawGraph_();
     if (this.attr_("zoomCallback")) {
       var minDate = this.rawData_[0][0];
@@ -2001,6 +2017,15 @@ Dygraph.prototype.drawGraph_ = function() {
  *   indices are into the axes_ array.
  */
 Dygraph.prototype.computeYAxes_ = function() {
+  var valueWindow;
+  if (this.axes_ != undefined) {
+    // Preserve valueWindow settings.
+    valueWindow = [];
+    for (var index = 0; index < this.axes_.length; index++) {
+      valueWindow.push(this.axes_[index].valueWindow);
+    }
+  }
+
   this.axes_ = [{}];  // always have at least one y-axis.
   this.seriesToAxisMap_ = {};
 
@@ -2073,6 +2098,13 @@ Dygraph.prototype.computeYAxes_ = function() {
     if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s];
   }
   this.seriesToAxisMap_ = seriesToAxisFiltered;
+
+  if (valueWindow != undefined) {
+    // Restore valueWindow settings.
+    for (var index = 0; index < valueWindow.length; index++) {
+      this.axes_[index].valueWindow = valueWindow[index];
+    }
+  }
 };
 
 /**