From 3605789a3614ba983eddf10c43ff0c91090af6ed Mon Sep 17 00:00:00 2001
From: Devendra Tewari <devendra.tewari@gmail.com>
Date: Thu, 7 Nov 2019 18:37:42 -0300
Subject: [PATCH] refresh list of devices

---
 HidTool/MainForm.Designer.cs | 29 ++++++++++++++++++++++-
 HidTool/MainForm.cs          | 45 +++++++++++++++++++++++++++++++++++-
 2 files changed, 72 insertions(+), 2 deletions(-)

diff --git a/HidTool/MainForm.Designer.cs b/HidTool/MainForm.Designer.cs
index e9a4079..394390d 100644
--- a/HidTool/MainForm.Designer.cs
+++ b/HidTool/MainForm.Designer.cs
@@ -29,21 +29,46 @@ protected override void Dispose(bool disposing)
         private void InitializeComponent()
         {
             this.hidDevicesCombo = new System.Windows.Forms.ComboBox();
+            this.refresh = new System.Windows.Forms.Button();
+            this.open = new System.Windows.Forms.Button();
             this.SuspendLayout();
             // 
             // hidDevicesCombo
             // 
+            this.hidDevicesCombo.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
             this.hidDevicesCombo.FormattingEnabled = true;
             this.hidDevicesCombo.Location = new System.Drawing.Point(13, 13);
             this.hidDevicesCombo.Name = "hidDevicesCombo";
-            this.hidDevicesCombo.Size = new System.Drawing.Size(121, 21);
+            this.hidDevicesCombo.Size = new System.Drawing.Size(430, 21);
             this.hidDevicesCombo.TabIndex = 0;
             // 
+            // refresh
+            // 
+            this.refresh.Location = new System.Drawing.Point(449, 13);
+            this.refresh.Name = "refresh";
+            this.refresh.Size = new System.Drawing.Size(75, 23);
+            this.refresh.TabIndex = 1;
+            this.refresh.Text = "Refresh";
+            this.refresh.UseVisualStyleBackColor = true;
+            this.refresh.Click += new System.EventHandler(this.Refresh_Click);
+            // 
+            // open
+            // 
+            this.open.Location = new System.Drawing.Point(531, 13);
+            this.open.Name = "open";
+            this.open.Size = new System.Drawing.Size(75, 23);
+            this.open.TabIndex = 2;
+            this.open.Text = "Open";
+            this.open.UseVisualStyleBackColor = true;
+            this.open.Click += new System.EventHandler(this.Open_Click);
+            // 
             // MainForm
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(800, 450);
+            this.Controls.Add(this.open);
+            this.Controls.Add(this.refresh);
             this.Controls.Add(this.hidDevicesCombo);
             this.Name = "MainForm";
             this.Text = "HID Tool";
@@ -55,6 +80,8 @@ private void InitializeComponent()
         #endregion
 
         private System.Windows.Forms.ComboBox hidDevicesCombo;
+        private System.Windows.Forms.Button refresh;
+        private System.Windows.Forms.Button open;
     }
 }
 
diff --git a/HidTool/MainForm.cs b/HidTool/MainForm.cs
index 93d82f1..83ce830 100644
--- a/HidTool/MainForm.cs
+++ b/HidTool/MainForm.cs
@@ -7,6 +7,9 @@ namespace HidTool
 {
     public partial class MainForm : Form
     {
+        List<HidDevice> hidDevices = new List<HidDevice>();
+        HidStream stream;
+
         public MainForm()
         {
             InitializeComponent();
@@ -14,9 +17,49 @@ public MainForm()
 
         private void MainForm_Load(object sender, EventArgs e)
         {
+            DeviceList.Local.Changed += DeviceListChanged;
+            RefreshDevices();
+        }
+
+        private void DeviceListChanged(object sender, DeviceListChangedEventArgs e)
+        {
+            RefreshDevices();
+        }
+
+        private void RefreshDevices()
+        {
+            if (InvokeRequired)
+            {
+                BeginInvoke(new MethodInvoker(() =>
+                {
+                    RefreshDevices();
+                }));
+                return;
+            }
+            hidDevicesCombo.Items.Clear();
+            hidDevices.Clear();
             foreach (HidDevice device in DeviceList.Local.GetHidDevices())
             {
-                hidDevicesCombo.Items.Add(device.GetFriendlyName());
+                hidDevicesCombo.Items.Add($"{device.GetFriendlyName()} [{device.GetSerialNumber()}] [VID 0x{device.VendorID:X}] [PID 0x{device.ProductID:X}]");
+                hidDevices.Add(device);
+            }
+        }
+
+        private void Refresh_Click(object sender, EventArgs e)
+        {
+            RefreshDevices();
+        }
+
+        private void Open_Click(object sender, EventArgs e)
+        {
+            if (hidDevicesCombo.SelectedIndex == -1)
+            {
+                MessageBox.Show(this, "Please select a HID device in the list.");
+                return;
+            }
+            if (!hidDevices[hidDevicesCombo.SelectedIndex].TryOpen(out stream))
+            {
+                MessageBox.Show(this, "Could not open HID stream. Device may be in use.");
             }
         }
     }