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<script src="../libraries/RGraph.scatter.js" ></script>
<title>A Scatter chart with the crosshairs snap option</title>
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<meta name="description" content="A Scatter chart which is using crosshairs and the snap option" />
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<h1>A Scatter chart demonstrating the crosshairs snap option</h1>
<p>
This Scatter chart demonstrates how you can extract the Scatter charts dataset and index from the variables set on the canvas tag
by RGraph.
</p>
<canvas id="cvs" width="600" height="400">[No canvas support]</canvas>
<script>
window.onload = function ()
{
var scatter = new RGraph.Scatter({
id:'cvs',
data: [
[[0,0,'red'],[5,5,'red'],[10,10,'red'],[15,15,'red'],[20,20,'red'],[25,25,'red'],[30,30,'red'],[35,35,'red'],[40,40,'red'],[45,45,'red'],[50,50,'red']],
[[0,0,'green'],[5,1,'green'],[10,2,'green'],[15,3,'green'],[20,4,'green'],[25,5,'green'],[30,6,'green'],[35,7,'green'],[40,8,'green'],[45,9,'green'],[50,10,'green']]
],
options: {
xmax: 100,
crosshairs: true,
crosshairsSnap: true,
gutterLeft: 50,
line: true,
lineColors: ['red','green'],
labels: ['Q1','Q2','Q3','Q4'],
textAccessible: true
}
}).draw()
scatter.oncrosshairs = function (obj)
{
document.getElementById("dataset").value = obj.canvas.__crosshairs_snap_dataset__;
document.getElementById("point").value = obj.canvas.__crosshairs_snap_point__;
}
};
</script>
<p />
Dataset:<br />
<input id="dataset" type="text" /><br /><br />
Point:<br />
<input id="point" type="text" />
<p></p>
This goes in the documents header:
<pre class="code">
<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.dynamic.js"></script>
<script src="RGraph.scatter.js"></script>
</pre>
Put this where you want the chart to show up:
<pre class="code">
<canvas id="cvs" width="600" height="400">
[No canvas support]
</canvas>
</pre>
This is the code that generates the chart:
<pre class="code">
<script>
window.onload = function ()
{
var scatter = new RGraph.Scatter({
id:'cvs',
data: [
[[0,0,'red'],[5,5,'red'],[10,10,'red'],[15,15,'red'],[20,20,'red'],[25,25,'red'],[30,30,'red'],[35,35,'red'],[40,40,'red'],[45,45,'red'],[50,50,'red']],
[[0,0,'green'],[5,1,'green'],[10,2,'green'],[15,3,'green'],[20,4,'green'],[25,5,'green'],[30,6,'green'],[35,7,'green'],[40,8,'green'],[45,9,'green'],[50,10,'green']]
],
options: {
xmax: 100,
textAccessible: true,
crosshairs: true,
crosshairsSnap: true,
gutterLeft: 50,
line: true,
lineColors: ['red','green'],
labels: ['Q1','Q2','Q3','Q4']
}
}).draw();
scatter.oncrosshairs = function (obj)
{
document.getElementById("dataset").value = obj.canvas.__crosshairs_snap_dataset__;
document.getElementById("point").value = obj.canvas.__crosshairs_snap_point__;
}
};
</script>
</pre>
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