From bfbfbfc49140e88753823e01abdc1ffc12e44ba2 Mon Sep 17 00:00:00 2001
From: Frank Wuerthwein <fkw@ucsd.edu>
Date: Mon, 16 Feb 2009 13:04:50 +0000
Subject: Move trim_data into a new class: rrdFlotSelection, in the
 rrdFlotSupport module

---
 src/lib/rrdFlotSupport.js | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

(limited to 'src/lib/rrdFlotSupport.js')

diff --git a/src/lib/rrdFlotSupport.js b/src/lib/rrdFlotSupport.js
index 8aa9e49..ede309c 100644
--- a/src/lib/rrdFlotSupport.js
+++ b/src/lib/rrdFlotSupport.js
@@ -43,3 +43,48 @@ function rrdDS2FlotSeries(rrd_file,ds_id,rra_idx,want_label) {
   }
 }
 
+// ======================================
+// Helper class for handling selections
+// =======================================================
+function rrdFlotSelection() {
+  this.selection_min=null;
+  this.selection_max=null;
+}
+
+// reset to a state where ther is no selection
+rrdFlotSelection.prototype.reset = function() {
+      this.selection_min=null;
+      this.selection_max=null;
+}
+
+// given the selection ranges, set internal variable accordingly
+rrdFlotSelection.prototype.setFromFlotRanges = function(ranges) {
+      this.selection_min=ranges.xaxis.from;
+      this.selection_max=ranges.xaxis.to;
+}
+
+// Given an array of flot lines, limit to the selection
+rrdFlotSelection.prototype.trim_flot_data = function(flot_data) {
+  var out_data=[];
+  for (var i=0; i<flot_data.length; i++) {
+    var data_el=flot_data[i];
+    out_data.push({label : data_el.label, data:this.trim_data(data_el.data)});
+  }
+  return out_data;
+};
+
+// Limit to selection the flot series data element
+rrdFlotSelection.prototype.trim_data = function(data_list) {
+  if (this.selection_min==null) return data_list; // no selection => no filtering
+
+  var out_data=[];
+  for (var i=0; i<data_list.length; i++) {
+    if (data_list[i]==null) continue; // protect
+    var nr=data_list[i][0];
+    if ((nr>=this.selection_min) && (nr<=this.selection_max)) {
+      out_data.push(data_list[i]);
+    }
+  }
+  return out_data;
+};
+
-- 
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