1# Drawing an area chart 2 3[Reference](http://wiki.pchart.net/doc.chart.drawareachart.html) 4 5```php 6require '/path/to/your/vendor/autoload.php'; 7 8use CpChart\Data; 9use CpChart\Image; 10 11$data = new Data(); 12for ($i = 0; $i <= 30; $i++) { 13 $data->addPoints(rand(1, 15), "Probe 1"); 14} 15$data->setSerieTicks("Probe 2", 4); 16$data->setAxisName(0, "Temperatures"); 17 18// Create the Image object 19$image = new Image(700, 230, $data); 20 21/* Turn off Antialiasing */ 22$image->Antialias = false; 23 24/* Add a border to the picture */ 25$image->drawRectangle(0, 0, 699, 229, ["R" => 0, "G" => 0, "B" => 0]); 26 27/* Write the chart title */ 28$image->setFontProperties(["FontName" => "Forgotte.ttf", "FontSize" => 11]); 29$image->drawText(150, 35, "Average temperature", ["FontSize" => 20, "Align" => TEXT_ALIGN_BOTTOMMIDDLE]); 30 31/* Set the default font */ 32$image->setFontProperties(["FontName" => "pf_arma_five.ttf", "FontSize" => 6]); 33 34/* Define the chart area */ 35$image->setGraphArea(60, 40, 650, 200); 36 37/* Draw the scale */ 38$scaleSettings = [ 39 "XMargin" => 10, 40 "YMargin" => 10, 41 "Floating" => true, 42 "GridR" => 200, 43 "GridG" => 200, 44 "GridB" => 200, 45 "DrawSubTicks" => true, 46 "CycleBackground" => true 47]; 48$image->drawScale($scaleSettings); 49 50/* Write the chart legend */ 51$image->drawLegend(600, 20, ["Style" => LEGEND_NOBORDER, "Mode" => LEGEND_HORIZONTAL]); 52 53/* Turn on Antialiasing */ 54$image->Antialias = true; 55 56/* Enable shadow computing */ 57$image->setShadow(true, ["X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 10]); 58 59/* Draw the area chart */ 60$Threshold = []; 61$Threshold[] = ["Min" => 0, "Max" => 5, "R" => 207, "G" => 240, "B" => 20, "Alpha" => 70]; 62$Threshold[] = ["Min" => 5, "Max" => 10, "R" => 240, "G" => 232, "B" => 20, "Alpha" => 70]; 63$Threshold[] = ["Min" => 10, "Max" => 20, "R" => 240, "G" => 191, "B" => 20, "Alpha" => 70]; 64$image->drawAreaChart(["Threshold" => $Threshold]); 65 66/* Write the thresholds */ 67$image->drawThreshold(5, ["WriteCaption" => true, "Caption" => "Warn Zone", "Alpha" => 70, "Ticks" => 2, "R" => 0, "G" => 0, "B" => 255]); 68$image->drawThreshold(10, ["WriteCaption" => true, "Caption" => "Error Zone", "Alpha" => 70, "Ticks" => 2, "R" => 0, "G" => 0, "B" => 255]); 69 70/* Render the picture (choose the best way) */ 71$image->autoOutput("example.drawAreaChart.threshold.png"); 72``` 73
