adding discovery menu

MainForm.Designer.cs

@@ -32,7 +32,15 @@
             lbMain = new ListBox();
             statusStripMain = new StatusStrip();
             toolStripStatusLabel = new ToolStripStatusLabel();
+            menuStrip1 = new MenuStrip();
+            discoveryToolStripMenuItem = new ToolStripMenuItem();
+            startToolStripMenuItem = new ToolStripMenuItem();
+            stopToolStripMenuItem = new ToolStripMenuItem();
+            forceReloadToolStripMenuItem = new ToolStripMenuItem();
+            saveToolStripMenuItem = new ToolStripMenuItem();
+            loadToolStripMenuItem = new ToolStripMenuItem();
             statusStripMain.SuspendLayout();
+            menuStrip1.SuspendLayout();
             SuspendLayout();
             // 
             // lbMain
@@ -60,19 +68,73 @@
             toolStripStatusLabel.Name = "toolStripStatusLabel";
             toolStripStatusLabel.Size = new Size(0, 17);
             // 
+            // menuStrip1
+            // 
+            menuStrip1.Items.AddRange(new ToolStripItem[] { discoveryToolStripMenuItem });
+            menuStrip1.Location = new Point(0, 0);
+            menuStrip1.Name = "menuStrip1";
+            menuStrip1.Size = new Size(800, 24);
+            menuStrip1.TabIndex = 2;
+            menuStrip1.Text = "menuStrip1";
+            // 
+            // discoveryToolStripMenuItem
+            // 
+            discoveryToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { startToolStripMenuItem, stopToolStripMenuItem, forceReloadToolStripMenuItem, saveToolStripMenuItem, loadToolStripMenuItem });
+            discoveryToolStripMenuItem.Name = "discoveryToolStripMenuItem";
+            discoveryToolStripMenuItem.Size = new Size(70, 20);
+            discoveryToolStripMenuItem.Text = "Discovery";
+            // 
+            // startToolStripMenuItem
+            // 
+            startToolStripMenuItem.Name = "startToolStripMenuItem";
+            startToolStripMenuItem.Size = new Size(180, 22);
+            startToolStripMenuItem.Text = "Start";
+            startToolStripMenuItem.Click += startToolStripMenuItem_Click;
+            // 
+            // stopToolStripMenuItem
+            // 
+            stopToolStripMenuItem.Enabled = false;
+            stopToolStripMenuItem.Name = "stopToolStripMenuItem";
+            stopToolStripMenuItem.Size = new Size(180, 22);
+            stopToolStripMenuItem.Text = "Stop";
+            stopToolStripMenuItem.Click += stopToolStripMenuItem_Click;
+            // 
+            // forceReloadToolStripMenuItem
+            // 
+            forceReloadToolStripMenuItem.Name = "forceReloadToolStripMenuItem";
+            forceReloadToolStripMenuItem.Size = new Size(180, 22);
+            forceReloadToolStripMenuItem.Text = "Force reload";
+            forceReloadToolStripMenuItem.Click += forceReloadToolStripMenuItem_Click;
+            // 
+            // saveToolStripMenuItem
+            // 
+            saveToolStripMenuItem.Name = "saveToolStripMenuItem";
+            saveToolStripMenuItem.Size = new Size(180, 22);
+            saveToolStripMenuItem.Text = "Save";
+            // 
+            // loadToolStripMenuItem
+            // 
+            loadToolStripMenuItem.Name = "loadToolStripMenuItem";
+            loadToolStripMenuItem.Size = new Size(180, 22);
+            loadToolStripMenuItem.Text = "Load";
+            // 
             // MainForm
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
             ClientSize = new Size(800, 450);
             Controls.Add(statusStripMain);
+            Controls.Add(menuStrip1);
             Controls.Add(lbMain);
             Icon = (Icon)resources.GetObject("$this.Icon");
+            MainMenuStrip = menuStrip1;
             Name = "MainForm";
             Text = "RoboSpot MotionCamera finder";
             FormClosing += MainForm_FormClosing;
             statusStripMain.ResumeLayout(false);
             statusStripMain.PerformLayout();
+            menuStrip1.ResumeLayout(false);
+            menuStrip1.PerformLayout();
             ResumeLayout(false);
             PerformLayout();
         }
@@ -82,5 +144,12 @@
         private ListBox lbMain;
         private StatusStrip statusStripMain;
         private ToolStripStatusLabel toolStripStatusLabel;
+        private MenuStrip menuStrip1;
+        private ToolStripMenuItem discoveryToolStripMenuItem;
+        private ToolStripMenuItem startToolStripMenuItem;
+        private ToolStripMenuItem stopToolStripMenuItem;
+        private ToolStripMenuItem forceReloadToolStripMenuItem;
+        private ToolStripMenuItem saveToolStripMenuItem;
+        private ToolStripMenuItem loadToolStripMenuItem;
     }
 }

MainForm.cs

@@ -15,6 +15,8 @@ namespace robospot_camera_finder
         public static string cam_username = "admin";
         public static string cam_password = "RoboSpot10";
 
+        private static string browse_scope = "_rtsp._tcp";
+
         public class Camera
         {
             private IPAddress ip;
@@ -93,8 +95,6 @@ namespace robospot_camera_finder
                 }
             }
 
-            browser.StartBrowse("_rtsp._tcp");
-
             lbMain.DataSource = all_cameras;
             lbMain.DisplayMember = "camera_name";
             lbMain.ValueMember = "camera_ip";
@@ -111,8 +111,34 @@ namespace robospot_camera_finder
 
             browser.ServiceRemoved += (sender, args) =>
             {
-                ServiceRemoved(sender, args);
+                if (browser.IsBrowsing)
+                {
+                    ServiceRemoved(sender, args);
+                }
             };
+
+            browse(true);
+        }
+
+        private void browse(bool browse_needed)
+        {
+            if (browse_needed)
+            {
+                if (!browser.IsBrowsing)
+                {
+                    browser.StartBrowse(browse_scope);
+                }
+            }
+            else
+            {
+                if (browser.IsBrowsing)
+                {
+                    browser.StopBrowse();
+                }
+            }
+
+            startToolStripMenuItem.Enabled = !browser.IsBrowsing;
+            stopToolStripMenuItem.Enabled = browser.IsBrowsing;
         }
 
         private void ServiceAdded(object sender, ServiceAnnouncementEventArgs args)
@@ -140,8 +166,25 @@ namespace robospot_camera_finder
                         serial = serial_line.Substring("SerialNumber=".Length).Trim();
                     }
 
-                    Camera camera = new Camera("Camera " + cam_addr.ToString() + " - " + location + " - " + serial, cam_addr, location, serial);
+                    Camera new_camera = new Camera("Camera " + cam_addr.ToString() + " - " + location + " - " + serial, cam_addr, location, serial);
-                    all_cameras.Add(camera);
+
+                    if (all_cameras.Count == 0)
+                    {
+                        all_cameras.Add(new_camera);
+                    } else
+                    {
+                        for (int i = 0; i < all_cameras.Count; i++)
+                        {
+                            if (all_cameras[i].camera_serial == new_camera.camera_serial)
+                            {
+                                all_cameras[i] = new_camera;
+                            }
+                            else
+                            {
+                                all_cameras.Add(new_camera);
+                            }
+                        }
+                    }
                 }
             }
         }
@@ -180,5 +223,26 @@ namespace robospot_camera_finder
                 toolStripStatusLabel.Text = "";
             }
         }
+
+        private void startToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            browse(true);
+        }
+
+        private void stopToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            browse(false);
+        }
+
+        private void forceReloadToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            DialogResult result = MessageBox.Show("Are you sure you want to clear discovered cameras and restart the discovery process ?", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
+            if (result == DialogResult.Yes)
+            {
+                browse(false);
+                all_cameras.Clear();
+                browse(true);
+            }
+        }
     }
 }

MainForm.resx

@@ -120,6 +120,9 @@
   <metadata name="statusStripMain.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>17, 17</value>
   </metadata>
+  <metadata name="menuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>153, 17</value>
+  </metadata>
   <assembly alias="System.Drawing" name="System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
   <data name="$this.Icon" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
     <value>