var ctx = this.element.getContext("2d");
if (this.options.underlayCallback) {
- this.options.underlayCallback(ctx, this.area, this.layout);
+ this.options.underlayCallback(ctx, this.area, this.layout, this.dygraph_);
}
if (this.options.drawYGrid) {
--- /dev/null
+<html>
+ <head>
+ <title>Highlighted Region</title>
+ <!--[if IE]>
+ <script type="text/javascript" src="excanvas.js"></script>
+ <![endif]-->
+ <script type="text/javascript" src="../strftime/strftime-min.js"></script>
+ <script type="text/javascript" src="../rgbcolor/rgbcolor.js"></script>
+ <script type="text/javascript" src="../dygraph-canvas.js"></script>
+ <script type="text/javascript" src="../dygraph.js"></script>
+ <script type="text/javascript" src="data.js"></script>
+ </head>
+ <body>
+ <p>Should draw a time series with an unusual region highlighted:</p>
+ <div id="div_g" style="width:600px; height:300px;"></div>
+
+ <p>When you zoom/pan, the region should remain highlighted.</p>
+
+ <script type="text/javascript">
+ // A basic sinusoidal data series.
+ var data = [];
+ for (var i = 0; i < 1000; i++) {
+ var base = 10 * Math.sin(i / 90.0);
+ data.push([i, base, base + Math.sin(i / 2.0)]);
+ }
+
+ // Shift one portion out of line.
+ var highlight_start = 450;
+ var highlight_end = 500;
+ for (var i = highlight_start; i <= highlight_end; i++) {
+ data[i][2] += 5.0;
+ }
+
+
+ new Dygraph(
+ document.getElementById("div_g"),
+ data,
+ {
+ labels: ['X', 'Est.', 'Actual'],
+ underlayCallback: function(canvas, area, layout, g) {
+ var bottom_left = g.toDomCoords(highlight_start, -20);
+ var top_right = g.toDomCoords(highlight_end, +20);
+
+ var left = bottom_left[0];
+ var right = top_right[0];
+
+ canvas.fillStyle = "rgba(255, 255, 102, 0.5)";
+ canvas.fillRect(left, area.y, right - left, area.h);
+ }
+
+ }
+ );
+ </script>
+ </body>
+</html>
projects / dygraphs.git / commitdiff