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