Added automatic sample purging when storage reaches limit.

Changed internal storage from Stack to Deque in NetworkInterfaceSampler.
Changed NetworkInterfaceSampler to implement IEnumerable<Sample>.
Added application icon.

Author: Bilge

.gitignore

@@ -1,3 +1,5 @@
 .*/
 bin/
 obj/
+packages/
+*.user

Source/Controls/NetGraph.cs

@@ -89,7 +89,7 @@ protected override void OnPaint(PaintEventArgs e) {
                 // Drawing start point on x-axis.
                 var x = surface.Right - 1;
 
-                foreach (var sample in sampler.GetSamples()) {
+                foreach (var sample in sampler) {
                     var downstream = sample.Downstream / (float)sampler.MaximumSpeed;
                     var upstream = sample.Upstream / (float)sampler.MaximumSpeed;
                     var downDominant = downstream > upstream;

Source/FodyWeavers.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Weavers>
+	<Costura/>
+</Weavers>

Source/Forms/NetGraphForm.Designer.cs

@@ -50,12 +50,12 @@ private Options Options
 
         private Sample LastSample
         {
-            get { return sampler.GetSamples().First(); }
+            get { return sampler.First(); }
         }
 
         private IEnumerable<Sample> LatestSamples
         {
-            get { return sampler.GetSamples().Take(10); }
+            get { return sampler.Take(10); }
         }
 
         private ulong AverageDownloadSpeed
@@ -90,11 +90,13 @@ private void SyncOptionsWithUI(Options options) {
         }
 
         private void UpdateStats() {
-            dlRaw.Text = Math.Round(LastSample.Downstream / 1000f, 1).ToString("F1");
-            ulRaw.Text = Math.Round(LastSample.Upstream / 1000f, 1).ToString("F1");
+            const string FORMAT = "F1";
 
-            dlAvg.Text = Math.Round(AverageDownloadSpeed / 1000f, 1).ToString("F1");
-            ulAvg.Text = Math.Round(AverageUploadSpeed / 1000f, 1).ToString("F1");
+            dlRaw.Text = Math.Round(LastSample.Downstream / 1000f, 1).ToString(FORMAT);
+            ulRaw.Text = Math.Round(LastSample.Upstream / 1000f, 1).ToString(FORMAT);
+
+            dlAvg.Text = Math.Round(AverageDownloadSpeed / 1000f, 1).ToString(FORMAT);
+            ulAvg.Text = Math.Round(AverageUploadSpeed / 1000f, 1).ToString(FORMAT);
         }
 
         private void UpdateTray() {
@@ -137,7 +139,7 @@ private void ToggleWindowVisibility() {
         private bool CanSnap(int clientEdge, int containerEdge, int tension) {
             const int DOCK_DISTANCE = 10;
 
-            return Math.Abs(clientEdge - containerEdge) <= DOCK_DISTANCE && tension <= DOCK_DISTANCE && tension >= -DOCK_DISTANCE;
+            return Math.Abs(clientEdge - containerEdge) <= DOCK_DISTANCE && Math.Abs(tension) <= DOCK_DISTANCE;
         }
 
         #region Event handlers

Source/Forms/NetGraphForm.cs

@@ -121,10 +121,10 @@
     <value>17, 17</value>
   </metadata>
   <metadata name="trayIcon.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>394, 17</value>
+    <value>271, 17</value>
   </metadata>
   <metadata name="trayMenu.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>489, 17</value>
+    <value>366, 17</value>
   </metadata>
   <metadata name="samplerBindingSource.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>97, 17</value>

Source/Forms/NetGraphForm.resx

@@ -1,20 +1,19 @@
-using System;
+using Nito.Collections;
+using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
 using System.Net.NetworkInformation;
 
 namespace ScriptFUSION.UpDown_Meter {
-    public class NetworkInterfaceSampler : INotifyPropertyChanged {
+    public class NetworkInterfaceSampler : INotifyPropertyChanged, IEnumerable<Sample> {
         private NetworkInterface nic;
+
         private ulong maximumSpeed;
 
         private PropertyChangedEventHandler propertyChangedHandlers;
 
-        public NetworkInterfaceSampler() {
-            Reset();
-        }
-
         public delegate void SampleAddedDelegate(NetworkInterfaceSampler sampler, Sample sample);
 
         public delegate void SamplesClearedDelegate(NetworkInterfaceSampler sampler);
@@ -30,9 +29,9 @@ event PropertyChangedEventHandler INotifyPropertyChanged.PropertyChanged
         }
 
         /// <summary>
-        /// Stack of relative samples from the current NetworkInterface.
+        /// Collection of relative samples from the current NetworkInterface.
         /// </summary>
-        private Stack<Sample> Samples { get; set; }
+        private Deque<Sample> Samples { get; set; } = new Deque<Sample>(0x1000);
 
         /// <summary>
         /// Latest absolute sample from the current NetworkInterface.
@@ -66,17 +65,21 @@ public ulong MaximumSpeed
         }
 
         public void Reset() {
-            Samples = new Stack<Sample>(Samples?.Count ?? 0x100);
+            Samples.Clear();
             LastSample = null;
 
             RaiseSamplesCleared();
         }
 
         public void SampleAdapter() {
-            var sample = CreateRelativeSample();
-            Samples.Push(sample);
+            // Remove oldest sample when at capacity.
+            if (Samples.Count == Samples.Capacity) {
+                Samples.RemoveFromBack();
+            }
 
-            // TODO: Crop old samples.
+            // Add latest sample.
+            var sample = CreateRelativeSample();
+            Samples.AddToFront(sample);
 
             // TODO: Automatic calibration.
 
@@ -103,10 +106,6 @@ private Sample CreateAbsoluteSample(IPInterfaceStatistics stats) {
             return new Sample(stats.BytesReceived, stats.BytesSent);
         }
 
-        public IEnumerable<Sample> GetSamples() {
-            return Samples.ToArray<Sample>();
-        }
-
         private void RaisePropertyChanged([System.Runtime.CompilerServices.CallerMemberName] string property = null) {
             propertyChangedHandlers?.Invoke(this, new PropertyChangedEventArgs(property));
         }
@@ -118,5 +117,13 @@ private void RaiseSampleAdded(Sample sample) {
         public void RaiseSamplesCleared() {
             SamplesCleared?.Invoke(this);
         }
+
+        public IEnumerator<Sample> GetEnumerator() {
+            return Samples.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() {
+            return Samples.GetEnumerator();
+        }
     }
 }