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msd2/tracking/piwik/vendor/szymach/c-pchart/doc/area.md

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+# Drawing an area chart
+
+[Reference](http://wiki.pchart.net/doc.chart.drawareachart.html)
+
+```php
+require '/path/to/your/vendor/autoload.php';
+
+use CpChart\Chart\Data;
+use CpChart\Chart\Image;
+
+$data = new Data();
+for ($i = 0; $i <= 30; $i++) {
+    $data->addPoints(rand(1, 15), "Probe 1");
+}
+$data->setSerieTicks("Probe 2", 4);
+$data->setAxisName(0, "Temperatures");
+
+// Create the Image object
+$image = new Image(700, 230, $data);
+
+/* Turn off Antialiasing */
+$image->Antialias = false;
+
+/* Add a border to the picture */
+$image->drawRectangle(0, 0, 699, 229, ["R" => 0, "G" => 0, "B" => 0]);
+
+/* Write the chart title */
+$image->setFontProperties(["FontName" => "Forgotte.ttf", "FontSize" => 11]);
+$image->drawText(150, 35, "Average temperature", ["FontSize" => 20, "Align" => TEXT_ALIGN_BOTTOMMIDDLE]);
+
+/* Set the default font */
+$image->setFontProperties(["FontName" => "pf_arma_five.ttf", "FontSize" => 6]);
+
+/* Define the chart area */
+$image->setGraphArea(60, 40, 650, 200);
+
+/* Draw the scale */
+$scaleSettings = [
+    "XMargin" => 10,
+    "YMargin" => 10,
+    "Floating" => true,
+    "GridR" => 200,
+    "GridG" => 200,
+    "GridB" => 200,
+    "DrawSubTicks" => true,
+    "CycleBackground" => true
+];
+$image->drawScale($scaleSettings);
+
+/* Write the chart legend */
+$image->drawLegend(600, 20, ["Style" => LEGEND_NOBORDER, "Mode" => LEGEND_HORIZONTAL]);
+
+/* Turn on Antialiasing */
+$image->Antialias = true;
+
+/* Enable shadow computing */
+$image->setShadow(true, ["X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 10]);
+
+/* Draw the area chart */
+$Threshold = [];
+$Threshold[] = ["Min" => 0, "Max" => 5, "R" => 207, "G" => 240, "B" => 20, "Alpha" => 70];
+$Threshold[] = ["Min" => 5, "Max" => 10, "R" => 240, "G" => 232, "B" => 20, "Alpha" => 70];
+$Threshold[] = ["Min" => 10, "Max" => 20, "R" => 240, "G" => 191, "B" => 20, "Alpha" => 70];
+$image->drawAreaChart(["Threshold" => $Threshold]);
+
+/* Write the thresholds */
+$image->drawThreshold(5, ["WriteCaption" => true, "Caption" => "Warn Zone", "Alpha" => 70, "Ticks" => 2, "R" => 0, "G" => 0, "B" => 255]);
+$image->drawThreshold(10, ["WriteCaption" => true, "Caption" => "Error Zone", "Alpha" => 70, "Ticks" => 2, "R" => 0, "G" => 0, "B" => 255]);
+
+/* Render the picture (choose the best way) */
+$image->autoOutput("example.drawAreaChart.threshold.png");
+```