From b0596010cff2798e94e5ec17955fd5f7cf538f62 Mon Sep 17 00:00:00 2001
From: paul-loedige <paul@gve-loedige.de>
Date: Fri, 8 Jan 2021 02:42:23 +0100
Subject: [PATCH] added legend and random colors for lines

---
 .../example/aped/ui/plots/PlotFragment.java   | 35 +++++++++++++++----
 1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/APED/app/src/main/java/com/example/aped/ui/plots/PlotFragment.java b/APED/app/src/main/java/com/example/aped/ui/plots/PlotFragment.java
index 5288915..e36cd73 100644
--- a/APED/app/src/main/java/com/example/aped/ui/plots/PlotFragment.java
+++ b/APED/app/src/main/java/com/example/aped/ui/plots/PlotFragment.java
@@ -1,5 +1,7 @@
 package com.example.aped.ui.plots;
 
+import android.graphics.Color;
+import android.graphics.ColorSpace;
 import android.net.sip.SipSession;
 import android.content.DialogInterface;
 import android.os.Bundle;
@@ -15,6 +17,7 @@ import com.example.aped.R;
 import com.example.aped.communication.Communicator;
 import com.example.aped.utils.IXML;
 import com.jjoe64.graphview.GraphView;
+import com.jjoe64.graphview.LegendRenderer;
 import com.jjoe64.graphview.series.DataPoint;
 import com.jjoe64.graphview.series.LineGraphSeries;
 
@@ -23,6 +26,7 @@ import org.json.JSONException;
 import org.json.JSONObject;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Random;
 
 public class PlotFragment extends Fragment {
 
@@ -34,6 +38,8 @@ public class PlotFragment extends Fragment {
     private GraphView graphView;
     /** List of all the devices with buffers. **/
     private List<String> bufferedDevicesSelected;
+    /** maximum value on X axis. **/
+    private int maxX = 0;
 
     /**
      *                                                                                          paul
@@ -103,7 +109,14 @@ public class PlotFragment extends Fragment {
     }
 
     private void getBufferedValues(final Communicator communicator, final IXML xml) {
+        Random random = new Random();
         for (String deviceName : this.bufferedDevices) {
+            int factor;
+            if(xml.getPort(deviceName).get("protocol").equals("PWM")) {
+                factor = 1;
+            } else {
+                factor = 100;
+            }
             communicator.readBuffer(deviceName, response -> {
                 try {
                     JSONObject buffer = response.getJSONObject("buffer");
@@ -111,7 +124,7 @@ public class PlotFragment extends Fragment {
                         String valueString = buffer.getString(pin);
                         valueString = valueString.substring(2, valueString.length() - 2);
                         String[] valueStringArray = valueString.split("', '");
-                        int[] values = new int[valueString.length()];
+                        int[] values = new int[valueStringArray.length];
                         for (int i = 0; i < valueStringArray.length; i++) {
                             values[i] = Integer.parseInt(valueStringArray[i]);
                         }
@@ -119,15 +132,23 @@ public class PlotFragment extends Fragment {
                         //display data
                         DataPoint[] dataPoints = new DataPoint[values.length];
                         for (int i = 0; i < values.length; i++){
-                            dataPoints[i] = new DataPoint(i, values[i]);
+                            dataPoints[i] = new DataPoint(i, values[i] * factor);
                         }
                         LineGraphSeries<DataPoint> lineGraphSeries = new LineGraphSeries<>(dataPoints);
-                        this.graphView.addSeries(lineGraphSeries);
-                        this.graphView.getViewport().setMaxX(600);
-                        this.graphView.getViewport().setMaxY(100);
-                        this.graphView.getViewport().setXAxisBoundsManual(true);
-                        this.graphView.getViewport().setYAxisBoundsManual(true);
+                        lineGraphSeries.setTitle(deviceName +":"+ pin);
+                        lineGraphSeries.setColor(Color.rgb(random.nextInt(256), random.nextInt(256), random.nextInt(256)));
+                        graphView.addSeries(lineGraphSeries);
+                        if (maxX < values.length) {
+                            maxX = values.length;
+                        }
+                        graphView.getViewport().setMaxY(100);
+                        graphView.getViewport().setMaxX(maxX);
+                        graphView.getViewport().setXAxisBoundsManual(true);
+                        graphView.getViewport().setYAxisBoundsManual(true);
                     }
+                    graphView.getLegendRenderer().setVisible(true);
+                    graphView.getLegendRenderer().setBackgroundColor(Color.rgb(200,200,200));
+                    graphView.getLegendRenderer().setAlign(LegendRenderer.LegendAlign.TOP);
                 } catch (JSONException e) {
                     Log.e("PlotFragment", "error while parsing JSON on READ BUFFER: " + e.getMessage());
                 }