90 lines
3.2 KiB
PHP
90 lines
3.2 KiB
PHP
<?php
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require_once("../lib/phpchartdir.php");
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# 4 data points to represent the cash flow for the Q1 - Q4
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$data = array(230, -140, 220, 330);
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# We want to plot a waterfall chart showing the 4 quarters as well as the total
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$labels = array("1st Quarter", "2nd Quarter", "3rd Quarter", "4th Quarter", "Total");
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# The top side of the bars in a waterfall chart is the accumulated data. We use the
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# ChartDirector ArrayMath utility to accumulate the data. The "total" is handled by
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# inserting a zero point at the end before accumulation (after accumulation it will
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# become the total).
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$tmpArrayMath1 = new ArrayMath($data);
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$tmpArrayMath1->insert2(0, 1, count($data));
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$tmpArrayMath1->acc();
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$boxTop = $tmpArrayMath1->result();
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# The botom side of the bars is just the top side of the previous bar. So we shifted
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# the top side data to obtain the bottom side data.
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$tmpArrayMath1 = new ArrayMath($boxTop);
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$tmpArrayMath1->shift(1, 0);
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$boxBottom = $tmpArrayMath1->result();
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# The last point (total) is different. Its bottom side is always 0.
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$boxBottom[count($boxBottom) - 1] = 0;
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# In this example, we want to use different colors depending on the data is positive
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# or negative.
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$posColor = 0x00ff00;
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$negColor = 0xff0000;
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# Create a XYChart object of size 500 x 280 pixels. Set background color to light
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# blue (ccccff), with 1 pixel 3D border effect.
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$c = new XYChart(500, 300, 0xccccff, 0x000000, 1);
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# Add a title to the chart using 13 points Arial Bold Itatic font, with white
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# (ffffff) text on a deep blue (0x80) background
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$textBoxObj = $c->addTitle("Corporate Cash Flow - Year 2004", "arialbi.ttf", 13,
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0xffffff);
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$textBoxObj->setBackground(0x000080);
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# Set the plotarea at (55, 50) and of size 430 x 215 pixels. Use alternative
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# white/grey background.
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$c->setPlotArea(55, 50, 430, 215, 0xffffff, 0xeeeeee);
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# Add a legend box at (55, 25) using 8 pts Arial Bold font with horizontal layout,
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# with transparent background and border color.
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$b = $c->addLegend(55, 25, false, "arialbd.ttf", 8);
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$b->setBackground(Transparent, Transparent);
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# Add keys to show the colors for positive and negative cash flows
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$b->addKey("Positive Cash Flow", $posColor);
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$b->addKey("Negative Cash Flow", $negColor);
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# Set the labels on the x axis using Arial Bold font
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$labelsObj = $c->xAxis->setLabels($labels);
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$labelsObj->setFontStyle("arialbd.ttf");
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# Set the x-axis ticks and grid lines to be between the bars
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$c->xAxis->setTickOffset(0.5);
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# Use Arial Bold as the y axis label font
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$c->yAxis->setLabelStyle("arialbd.ttf");
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# Add a title to the y axis
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$c->yAxis->setTitle("USD (in millions)");
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# Add a box-whisker layer to represent the waterfall bars
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$layer = $c->addBoxWhiskerLayer($boxTop, $boxBottom);
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# Color the bars depending on whether it is positive or negative
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for($i = 0; $i < count($boxTop); ++$i) {
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if ($boxTop[$i] >= $boxBottom[$i]) {
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$layer->setBoxColor($i, $posColor);
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} else {
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$layer->setBoxColor($i, $negColor);
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}
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}
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# Put data labels on the bars to show the cash flow using Arial Bold font
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$layer->setDataLabelFormat("{={top}-{bottom}}M");
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$textBoxObj = $layer->setDataLabelStyle("arialbd.ttf");
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$textBoxObj->setAlignment(Center);
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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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