104 lines
3.5 KiB
PHP
104 lines
3.5 KiB
PHP
<?php
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require_once("../lib/phpchartdir.php");
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#===================================================================
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# For demo purpose, use random numbers as data for the chart
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#===================================================================
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# Use a random table to create the data. The random table contains 4 cols x 31 rows,
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# using 9 as seed.
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$rantable = new RanTable(9, 4, 31);
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# Set the 1st col to be the series 1, 2, 3, ....
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$rantable->setCol(0, 1, 1, 1);
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# Set the 2nd, 3rd and 4th col to be random number starting from 40, 50 and 60. The
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# change between rows is set to -5 to 5. The minimum value of any cell is 0.
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$rantable->setCol(1, 40, -5, 5, 0);
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$rantable->setCol(2, 50, -5, 5, 0);
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$rantable->setCol(3, 60, -5, 5, 0);
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# Use the 1st col as the axis label
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$labels = $rantable->getCol(0);
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# Use the 2nd, 3rd and 4th columns for 3 lines
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$data0 = $rantable->getCol(1);
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$data1 = $rantable->getCol(2);
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$data2 = $rantable->getCol(3);
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# Simulate some data points have no data value
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for($i = 1; $i < 30; $i += 7) {
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$data0[$i] = NoValue;
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$data1[$i] = NoValue;
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$data2[$i] = NoValue;
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}
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#===================================================================
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# Now we have the data ready. Actually drawing the chart.
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#===================================================================
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# Create a XYChart object of size 600 x 220 pixels
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$c = new XYChart(600, 220);
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# Set the plot area at (100, 25) and of size 450 x 150 pixels. Enabled both vertical
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# and horizontal grids by setting their colors to light grey (0xc0c0c0)
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$plotAreaObj = $c->setPlotArea(100, 25, 450, 150);
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$plotAreaObj->setGridColor(0xc0c0c0, 0xc0c0c0);
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# Add a legend box (92, 0) (top of plot area) using horizontal layout. Use 8 pts
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# Arial font. Disable bounding box (set border to transparent).
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$legendObj = $c->addLegend(92, 0, false, "", 8);
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$legendObj->setBackground(Transparent);
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# Add a title to the y axis. Draw the title upright (font angle = 0)
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$textBoxObj = $c->yAxis->setTitle("Average\nUtilization\n(MBytes)");
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$textBoxObj->setFontAngle(0);
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# Use manually scaling of y axis from 0 to 100, with ticks every 10 units
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$c->yAxis->setLinearScale(0, 100, 10);
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# Set the labels on the x axis
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$c->xAxis->setLabels2($labels);
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# Set the title on the x axis
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$c->xAxis->setTitle("Jun - 2001");
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# Add x axis (vertical) zones to indicate Saturdays and Sundays
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for($i = 0; $i < 29; $i += 7) {
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$c->xAxis->addZone($i, $i + 2, 0xc0c0c0);
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}
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# Add a line layer to the chart
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$layer = $c->addLineLayer();
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# Set the default line width to 2 pixels
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$layer->setLineWidth(2);
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# Add the three data sets to the line layer
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$layer->addDataSet($data0, 0xcf4040, "Server #1");
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$layer->addDataSet($data1, 0x40cf40, "Server #2");
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$layer->addDataSet($data2, 0x4040cf, "Server #3");
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# Layout the chart to fix the y axis scaling. We can then use getXCoor and getYCoor
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# to determine the position of custom objects.
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$c->layout();
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# Add the "week n" custom text boxes at the top of the plot area.
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for($i = 0; $i < 4; ++$i) {
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# Add the "week n" text box using 8 pt Arial font with top center alignment.
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$textbox = $c->addText($layer->getXCoor($i * 7 + 2), 25, "Week $i",
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"arialbd.ttf", 8, 0x000000, TopCenter);
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# Set the box width to cover five days
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$textbox->setSize($layer->getXCoor($i * 7 + 7) - $layer->getXCoor($i * 7 + 2) +
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1, 0);
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# Set box background to pale yellow 0xffff80, with a 1 pixel 3D border
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$textbox->setBackground(0xffff80, Transparent, 1);
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}
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# output the chart
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header("Content-type: image/png");
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print($c->makeChart2(PNG));
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?>
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