From e4d308f32930c22eab3c3437460296df65b8f457 Mon Sep 17 00:00:00 2001
From: Tanner Linsley <tannerlinsley@gmail.com>
Date: Sat, 31 Oct 2015 22:45:11 -0600
Subject: [PATCH] Stacked Area Example

---
 samples/line-stacked-area.html | 174 +++++++++++++++++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 samples/line-stacked-area.html
diff --git a/samples/line-stacked-area.html b/samples/line-stacked-area.html
new file mode 100644
index 000000000..0f930dce0
--- /dev/null
+++ b/samples/line-stacked-area.html
@@ -0,0 +1,174 @@
+<!doctype html>
+<html>
+
+<head>
+  <title>Line Chart</title>
+  <script src="../Chart.js"></script>
+  <script src="../node_modules/jquery/dist/jquery.min.js"></script>
+  <style>
+    canvas {
+      -webkit-box-shadow: 0 0 20px 0 rgba(0, 0, 0, .5);
+    }
+  </style>
+</head>
+
+<body>
+  <div style="width:100%;">
+    <canvas id="canvas" style="width:100%;height:100%"></canvas>
+  </div>
+  <br>
+  <br>
+  <button id="randomizeData">Randomize Data</button>
+  <button id="addDataset">Add Dataset</button>
+  <button id="removeDataset">Remove Dataset</button>
+  <button id="addData">Add Data</button>
+  <button id="removeData">Remove Data</button>
+  <div>
+    <h3>Legend</h3>
+    <div id="legendContainer">
+    </div>
+  </div>
+  <script>
+    var randomScalingFactor = function() {
+      return Math.round(Math.random() * 100 * (Math.random() > 0.5 ? -1 : 1));
+    };
+    var randomColorFactor = function() {
+      return Math.round(Math.random() * 255);
+    };
+    var randomColor = function(opacity) {
+      return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',' + (opacity || '1') + ')';
+    };
+
+    var config = {
+      type: 'line',
+      data: {
+        labels: ["January", "February", "March", "April", "May", "June", "July"],
+        datasets: [{
+          label: "My First dataset",
+          data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+        }, {
+          label: "My Second dataset",
+          data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+        }, {
+          label: "My Third dataset",
+          data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+        }, {
+          label: "My Third dataset",
+          data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
+        }]
+      },
+      options: {
+        responsive: true,
+        tooltips: {
+          mode: 'label',
+        },
+        hover: {
+          mode: 'label'
+        },
+        scales: {
+          xAxes: [{
+            scaleLabel: {
+              show: true,
+              labelString: 'Month'
+            }
+          }],
+          yAxes: [{
+            stacked: true,
+            scaleLabel: {
+              show: true,
+              labelString: 'Value'
+            }
+          }]
+        }
+      }
+    };
+
+    $.each(config.data.datasets, function(i, dataset) {
+      var color = randomColor(1);
+      dataset.borderColor = color;
+      dataset.backgroundColor = color;
+      dataset.pointBorderColor = color;
+      dataset.pointBackgroundColor = color;
+      dataset.pointBorderWidth = 1;
+    });
+
+    console.log(config.data);
+
+    window.onload = function() {
+      var ctx = document.getElementById("canvas").getContext("2d");
+      window.myLine = new Chart(ctx, config);
+
+      updateLegend();
+    };
+
+    function updateLegend() {
+      $legendContainer = $('#legendContainer');
+      $legendContainer.empty();
+      $legendContainer.append(window.myLine.generateLegend());
+    }
+
+    $('#randomizeData').click(function() {
+      $.each(config.data.datasets, function(i, dataset) {
+        dataset.data = dataset.data.map(function() {
+          return randomScalingFactor();
+        });
+
+      });
+
+      window.myLine.update();
+      updateLegend();
+    });
+
+    $('#addDataset').click(function() {
+      var newDataset = {
+        label: 'Dataset ' + config.data.datasets.length,
+        borderColor: randomColor(0.4),
+        backgroundColor: randomColor(0.5),
+        pointBorderColor: randomColor(0.7),
+        pointBackgroundColor: randomColor(0.5),
+        pointBorderWidth: 1,
+        data: [],
+      };
+
+      for (var index = 0; index < config.data.labels.length; ++index) {
+        newDataset.data.push(randomScalingFactor());
+      }
+
+      config.data.datasets.push(newDataset);
+      window.myLine.update();
+      updateLegend();
+    });
+
+    $('#addData').click(function() {
+      if (config.data.datasets.length > 0) {
+        config.data.labels.push('dataset #' + config.data.labels.length);
+
+        $.each(config.data.datasets, function(i, dataset) {
+          dataset.data.push(randomScalingFactor());
+        });
+
+        window.myLine.update();
+        updateLegend();
+      }
+    });
+
+    $('#removeDataset').click(function() {
+      config.data.datasets.splice(0, 1);
+      window.myLine.update();
+      updateLegend();
+    });
+
+    $('#removeData').click(function() {
+      config.data.labels.splice(-1, 1); // remove the label first
+
+      config.data.datasets.forEach(function(dataset, datasetIndex) {
+        dataset.data.pop();
+      });
+
+      window.myLine.update();
+      updateLegend();
+    });
+  </script>
+</body>
+
+</html>
