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

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+# Drawing a linear bubble chart
+
+[Reference](http://wiki.pchart.net/doc.bubble.drawbubblechart.html)
+
+```php
+require '/path/to/your/vendor/autoload.php';
+
+use CpChart\Chart\Bubble;
+use CpChart\Chart\Data;
+use CpChart\Chart\Image;
+
+/* Create and populate the Data object */
+$data = new Data();
+$data->addPoints([34, 55, 15, 62, 38, 42], "Probe1");
+$data->addPoints([5, 10, 8, 9, 15, 10], "Probe1Weight");
+$data->addPoints([5, 10, -5, -1, 0, -10], "Probe2");
+$data->addPoints([6, 10, 14, 10, 14, 6], "Probe2Weight");
+$data->setSerieDescription("Probe1", "This year");
+$data->setSerieDescription("Probe2", "Last year");
+$data->setAxisName(0, "Current stock");
+$data->addPoints(["Apple", "Banana", "Orange", "Lemon", "Peach", "Strawberry"], "Product");
+$data->setAbscissa("Product");
+
+/* Create the Image object */
+$image = new Image(700, 230, $data);
+
+/* Draw the background */
+$settings = ["R" => 170, "G" => 183, "B" => 87, "Dash" => 1, "DashR" => 190, "DashG" => 203, "DashB" => 107];
+$image->drawFilledRectangle(0, 0, 700, 230, $settings);
+
+/* Overlay with a gradient */
+$settings = [
+    "StartR" => 219,
+    "StartG" => 231,
+    "StartB" => 139,
+    "EndR" => 1,
+    "EndG" => 138,
+    "EndB" => 68,
+    "Alpha" => 50
+];
+$image->drawGradientArea(0, 0, 700, 230, DIRECTION_VERTICAL, $settings);
+$image->drawGradientArea(0, 0, 700, 20, DIRECTION_VERTICAL, [
+    "StartR" => 0,
+    "StartG" => 0,
+    "StartB" => 0,
+    "EndR" => 50,
+    "EndG" => 50,
+    "EndB" => 50,
+    "Alpha" => 80
+]);
+
+/* Add a border to the picture */
+$image->drawRectangle(0, 0, 699, 229, ["R" => 0, "G" => 0, "B" => 0]);
+
+/* Write the picture title */
+$image->setFontProperties(["FontName" => "Silkscreen.ttf", "FontSize" => 6]);
+$image->drawText(10, 13, "drawBubbleChart() - draw a linear bubble chart", [
+    "R" => 255,
+    "G" => 255,
+    "B" => 255
+]);
+
+/* Write the title */
+$image->setFontProperties(["FontName" => "Forgotte.ttf", "FontSize" => 11]);
+$image->drawText(40, 55, "Current Stock / Needs chart", ["FontSize" => 14, "Align" => TEXT_ALIGN_BOTTOMLEFT]);
+
+/* Change the default font */
+$image->setFontProperties(["FontName" => "pf_arma_five.ttf", "FontSize" => 6]);
+
+/* Create the Bubble chart object and scale up */
+$bubbleChart = new Bubble($image, $data);
+
+/* Scale up for the bubble chart */
+$bubbleDataSeries = ["Probe1", "Probe2"];
+$bubbleWeightSeries = ["Probe1Weight", "Probe2Weight"];
+$bubbleChart->bubbleScale($bubbleDataSeries, $bubbleWeightSeries);
+
+/* Draw the 1st chart */
+$image->setGraphArea(40, 60, 430, 190);
+$image->drawFilledRectangle(40, 60, 430, 190, ["R" => 255, "G" => 255, "B" => 255,
+    "Surrounding" => -200, "Alpha" => 10]);
+$image->drawScale(["DrawSubTicks" => true, "CycleBackground" => true]);
+$image->setShadow(true, ["X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 30]);
+$bubbleChart->drawBubbleChart($bubbleDataSeries, $bubbleWeightSeries);
+
+/* Draw the 2nd scale */
+$image->setShadow(false);
+$image->setGraphArea(500, 60, 670, 190);
+$image->drawFilledRectangle(500, 60, 670, 190, [
+    "R" => 255,
+    "G" => 255,
+    "B" => 255,
+    "Surrounding" => -200,
+    "Alpha" => 10
+]);
+$image->drawScale(["Pos" => SCALE_POS_TOPBOTTOM, "DrawSubTicks" => true]);
+
+/* Draw the 2nd stock chart */
+$image->setShadow(true, ["X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 30]);
+$bubbleChart->drawbubbleChart($bubbleDataSeries, $bubbleWeightSeries);
+
+/* Write the chart legend */
+$image->drawLegend(550, 215, ["Style" => LEGEND_NOBORDER, "Mode" => LEGEND_HORIZONTAL]);
+
+/* Render the picture (choose the best way) */
+$image->autoOutput("example.drawBubbleChart.png");
+```