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<H1 CLASS="western">rrdFlot module</H1>
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<P>The <A HREF="../../src/lib/rrdFlot.js">rrdFlot Javascript
module</A> implements a class used to represents a
<A HREF="http://oss.oetiker.ch/rrdtool/">RDD archive</A>
as a <A HREF="http://code.google.com/p/flot/">Flot</A> plot.</P>
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<H2 CLASS="heading-2-western">Overview</H2>
<P>This module provide a single class: <A HREF="#rrdFlot">rrdFlot</A>.</P>
<P>Given a
<A HREF="rrdFile_js.html#RRDFile">RRDFile</A> object, this class
creates an interactive
<A HREF="http://code.google.com/p/flot/">Flot</A> plot.</P>
<P>In order to use this module, you also need to include:
<UL>
<LI><A HREF="rrdFlotSupport_js.html">rrdFlotSupport.js</A>
<LI><A HREF="http://code.google.com/p/flot/">jquery.flot.js</A>
<LI><A HREF="http://jquery.com/">jquery.js</A>
</UL></P>
<H2 CLASS="heading-2-western"><A NAME="rrdFlot"></A>Class rrdFlot</H2>
<P>The rrdFlot constructor has two to four arguments:</P>
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<P ALIGN=LEFT>Argument</P>
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<P ALIGN=LEFT>Description</P>
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<P>html_id</P>
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<P>ID of a HTML element, possibly a DIV.</P>
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<P>rrd_file</P>
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<P>An object of type <A HREF="rrdFile_js.html#RRDFile">RRDFile</A>, or equivalent.</P>
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<P>graph_options (optional)</P>
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<P>Global graphing options. See
<A HREF="http://code.google.com/p/flot/">Flot documentation</A>
for more details.</P>
<P>The recognized elements and the default values are:
<PRE>
graph_options = {
legend: {position:"nw",noColumns:3},
lines: { show:true },
yaxis: { autoscaleMargin: 0.20},
tooltip: true,
tooltipOpts: { content: "<h4>%s</h4> Value: %y.3" }, // %s: series text, %y.3: y-value toPrecision(3)
};
</PRE></P>
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<P>ds_graph_options (optional)</P>
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<P>Dictionary of graphing options. This must be a dictionary of DS_id.
Each element of the dictionary contains graphing options. See
<A HREF="http://code.google.com/p/flot/">Flot documentation</A>
for more details.</P>
<P>The recognized elements and the default values are:
<PRE>
{
title: label or ds_name // this is what is displayed in the checkboxes
checked: first_ds_in_list? // boolean
label: title or ds_name // this is what is displayed in the legend
color: ds_index // see Flot docs for details
lines: { show:true } // see Flot docs for details
yaxis: 1 // can be 1 or 2
stack: 'none' // other options are 'positive' and 'negative'
}
</PRE></P>
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<P>rrdflot_defaults (optional)</P>
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<P>Dictionary of rrd_flot options. All are optional.
<P>The recognized elements and the default values are:
<PRE>
{
legend: "Top" //Starting location of legend. Options are:
// "Top","Bottom","TopRight","BottomRight","None".
num_cb_rows: 12 //How many rows of DS checkboxes per column.
use_elem_buttons: false //To be used in conjunction with num_cb_rows: This option
// creates a button above every column, which selects
// every element in the column.
multi_ds: false //"true" appends the name of the aggregation function to the
// name of the DS element.
multi_rra: false //"true" appends the name of the RRA consolidation function (CF)
// (AVERAGE, MIN, MAX or LAST) to the name of the RRA. Useful
// for RRAs over the same interval with different CFs.
use_checked_DSs: false //Use the list checked_DSs below.
checked_DSs: [] //List of elements to be checked by default when graph is loaded.
// Overwrites graph options.
use_rra: false //Whether to use the rra index specified below.
rra: 0 //RRA (rra index in rrd) to be selected when graph is loaded.
use_windows: false //Whether to use the window zoom specifications below.
window_min: 0 //Sets minimum for window zoom. X-axis usually in unix time.
window_max: 0 //Sets maximum for window zoom.
graph_height: "300px" //Height of main graph.
graph_width: "500px" //Width of main graph.
scale_height: "110px" //Height of small scaler graph.
scale_width: "250px" //Width of small scaler graph.
timezone: "0" //Timezone to plot. Options are "-11" through "+12"
}
</PRE></P>
See the <A HREF=:../../src/examples/rrdJFlotDefaults.html">rrdflot_defaults in action.</A>
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<P>Once instatiated, the object will automatically draw the plot and handle user interaction.</P>
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<P>This module is part of the <A HREF="index.html">javascriptRRD
package</A> hosted at <A HREF="http://javascriptrrd.sourceforge.net/">http://javascriptrrd.sourceforge.net</A>.
<BR>It is licensed under the <A HREF="http://www.opensource.org/licenses/mit-license.php">MIT
license</A>.
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