Point list returns.

qml/BrewPlot/main.qml

@@ -19,33 +19,43 @@ Rectangle {
         width: 450; height: 600
         anchors {right: parent.right; rightMargin: 20; top: parent.top; topMargin: 20}
     }
-    ListView {
-        spacing: 3
-        height: 400
-        width: 100
-        z: -1
-        contentHeight: dataViewModel.count * 35
+    Item {
+        anchors {left: parent.left; leftMargin: 10; top: parent.top; topMargin: 10}
 
-        model: ListModel {
-            id: dataViewModel
-        }
-        delegate: Row {
-            spacing: 3
+        Column {
+            spacing: 8
 
-            Rectangle {
-                width: 30; height: 30
-                color: dataViewModel.get(index).color
-            }
-            Column {
-                Text {
-                    text: "Strength: " + dataViewModel.get(index).ptds + "% TDS"
+            ListView {
+                spacing: 3
+                height: 400
+                width: 100
+                z: -1
+                contentHeight: dataViewModel.count * 35
+
+                model: ListModel {
+                    id: dataViewModel
                 }
-                Text {
-                    text: "Extraction: " + Number(dataViewModel.get(index).extraction * 100).toFixed(2) + "%"
+                delegate: Row {
+                    spacing: 3
+
+                    Rectangle {
+                        width: 30; height: 30
+                        color: dataViewModel.get(index).color
+                    }
+                    Column {
+                        Text {
+                            text: "Strength: " + dataViewModel.get(index).ptds + "% TDS"
+                        }
+                        Text {
+                            text: "Extraction: " + Number(dataViewModel.get(index).extraction * 100).toFixed(2) + "%"
+                        }
+                    }
                 }
             }
         }
     }
+
+
     Component.onCompleted: {
         var quitItem = window.addMenuItem("File", "Quit");
         quitItem.shortcut = "Ctrl+Q";
@@ -73,7 +83,37 @@ Rectangle {
             graph.plotPoint(pointDescription.extraction,
                             pointDescription.ptds / 100,
                             pointDescription.color)
-            dataviewModel.append(pointDescription)
+            dataViewModel.append(pointDescription)
+            root.n += 1
+            root.sumy += pointDescription.ptds / 100
+            root.sumx += pointDescription.extraction
+            root.sumxy += ((pointDescription.ptds / 100) * extraction)
+            root.sumxsq += Math.pow(extraction, 2)
+            if(root.n > 1) {
+                var a = ((root.sumy * root.sumxsq)-(root.sumx * root.sumxy))/((root.n * root.sumxsq)-Math.pow(root.sumx, 2))
+                var b = ((root.n * root.sumxy)-(root.sumx * root.sumy))/((root.n * root.sumxsq) - Math.pow(root.sumx, 2))
+                var x1 = 0.14
+                var x2 = 0.26
+                var y1 = a + (b * x1)
+                var y2 = a + (b * x2)
+                if(y1 < 0.008) {
+                    x1 = (0.008 - a) / b
+                    y1 = 0.008
+                }
+                if(y2 < 0.008) {
+                    x2 = (0.008 - a) / b
+                    y2 = 0.008
+                }
+                if(y1 > 0.016) {
+                    x1 = (0.016 - a) / b
+                    y2 = 0.016
+                }
+                if(y2 > 0.016) {
+                    x2 = (0.016 - a) / b
+                    y2 = 0.016
+                }
+                graph.setFit(x1, y1, x2, y2)
+            }
         });
     }
 }