86 lines
3.5 KiB
PHP
86 lines
3.5 KiB
PHP
<?php
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require_once("../lib/phpchartdir.php");
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#
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# Data to draw the chart. In this demo, the data buffer will be filled by a random
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# data generator. In real life, the data is probably stored in a buffer (eg. a
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# database table, a text file, or some global memory) and updated by other means.
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#
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# We use a data buffer to emulate the last 240 samples.
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$sampleSize = 240;
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$dataSeries1 = array_pad(array(), $sampleSize, 0);
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$dataSeries2 = array_pad(array(), $sampleSize, 0);
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$dataSeries3 = array_pad(array(), $sampleSize, 0);
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$timeStamps = array_pad(array(), $sampleSize, 0);
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# Our pseudo random number generator
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$firstDate = chartTime2(time()) - count($timeStamps);
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for($i = 0; $i < count($timeStamps); ++$i) {
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$p = $firstDate + $i;
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$timeStamps[$i] = $p;
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$dataSeries1[$i] = cos($p * 7 * 18463) * 10 + 1 / (cos($p) * cos($p) + 0.01) + 20
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;
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$dataSeries2[$i] = 100 * sin($p / 27.7) * sin($p / 10.1) + 150;
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$dataSeries3[$i] = 100 * cos($p / 6.7) * cos($p / 11.9) + 150;
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}
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# Create an XYChart object 600 x 270 pixels in size, with light grey (f4f4f4)
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# background, black (000000) border, 1 pixel raised effect, and with a rounded frame.
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$c = new XYChart(600, 270, 0xf4f4f4, 0x000000, 0);
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$c->setRoundedFrame();
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# Set the plotarea at (55, 62) and of size 520 x 175 pixels. Use white (ffffff)
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# background. Enable both horizontal and vertical grids by setting their colors to
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# grey (cccccc). Set clipping mode to clip the data lines to the plot area.
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$c->setPlotArea(55, 62, 520, 175, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);
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$c->setClipping();
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# Add a title to the chart using 15 pts Times New Roman Bold Italic font, with a
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# light grey (dddddd) background, black (000000) border, and a glass like raised
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# effect.
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$textBoxObj = $c->addTitle("Zooming and Scrolling Demonstration", "timesbi.ttf", 15);
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$textBoxObj->setBackground(0xdddddd, 0x000000, glassEffect());
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# Add a legend box at the top of the plot area with 9pts Arial Bold font. We set the
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# legend box to the same width as the plot area and use grid layout (as opposed to
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# flow or top/down layout). This distributes the 3 legend icons evenly on top of the
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# plot area.
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$b = $c->addLegend2(55, 33, 3, "arialbd.ttf", 9);
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$b->setBackground(Transparent, Transparent);
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$b->setWidth(520);
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# Configure the y-axis with a 10pts Arial Bold axis title
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$c->yAxis->setTitle("Price (USD)", "arialbd.ttf", 10);
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# Configure the x-axis to auto-scale with at least 75 pixels between major tick and
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# 15 pixels between minor ticks. This shows more minor grid lines on the chart.
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$c->xAxis->setTickDensity(75, 15);
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# Set the axes width to 2 pixels
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$c->xAxis->setWidth(2);
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$c->yAxis->setWidth(2);
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# Set the x-axis label format
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$c->xAxis->setLabelFormat("{value|hh:nn:ss}");
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# Create a line layer to plot the lines
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$layer = $c->addLineLayer2();
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# The x-coordinates are the timeStamps.
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$layer->setXData($timeStamps);
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# The 3 data series are used to draw 3 lines. Here we put the latest data values as
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# part of the data set name, so you can see them updated in the legend box.
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$layer->addDataSet($dataSeries1, 0xff0000, $c->formatValue($dataSeries1[count(
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$dataSeries1) - 1], "Software: <*bgColor=FFCCCC*> {value|2} "));
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$layer->addDataSet($dataSeries2, 0x00cc00, $c->formatValue($dataSeries2[count(
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$dataSeries2) - 1], "Hardware: <*bgColor=CCFFCC*> {value|2} "));
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$layer->addDataSet($dataSeries3, 0x0000ff, $c->formatValue($dataSeries3[count(
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$dataSeries3) - 1], "Services: <*bgColor=CCCCFF*> {value|2} "));
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# output the chart
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header("Content-type: image/png");
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print($c->makeChart2(PNG));
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?>
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