Mercurial > servermonitor
annotate ServerMonitor/Forms/ServerSummaryForm.cs @ 16:7626b099aefd
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| author | Brad Greco <brad@bgreco.net> |
|---|---|
| date | Tue, 30 Apr 2019 20:40:58 -0400 |
| parents | 75ca86e0862c |
| children | b3128fe10d57 |
| rev | line source |
|---|---|
| 10 | 1 using NAppUpdate.Framework; |
| 2 using NAppUpdate.Framework.Sources; | |
| 3 using ServerMonitorApp.Properties; | |
| 4 | 4 using System; |
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5 using System.Collections.Generic; |
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6 using System.ComponentModel; |
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7 using System.Data; |
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8 using System.Drawing; |
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9 using System.Linq; |
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10 using System.Windows.Forms; |
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11 |
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12 namespace ServerMonitorApp |
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13 { |
| 16 | 14 /// <summary>Main application form that shows an overview of all servers.</summary> |
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15 public partial class ServerSummaryForm : Form |
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16 { |
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17 private readonly Dictionary<Server, ServerForm> serverForms = new Dictionary<Server, ServerForm>(); |
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18 private ServerMonitor monitor; |
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19 |
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20 public ServerSummaryForm() |
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21 { |
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22 InitializeComponent(); |
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23 } |
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24 |
| 16 | 25 private void ServerSummaryForm_Load(object sender, EventArgs e) |
| 26 { | |
| 27 // Restore the window size from the previous session. | |
| 28 Size size = Settings.Default.SummaryFormSize; | |
| 29 if (size.Height > 0 && size.Width > 0) | |
| 30 Size = size; | |
| 31 | |
| 32 // Resize the images in buttons to fit the button size. | |
| 33 Helpers.FormatImageButton(NewServerButton); | |
| 34 Helpers.FormatImageButton(SettingsButton); | |
| 35 // Create the global server monitor object. | |
| 36 monitor = new ServerMonitor(this); | |
| 37 // Load the server configuration file. | |
| 38 while (true) | |
| 39 { | |
| 40 try | |
| 41 { | |
| 42 // If the configuration file is loaded successfully, proceed. | |
| 43 monitor.LoadServers(); | |
| 44 break; | |
| 45 } | |
| 46 catch (Exception ex) | |
| 47 { | |
| 48 // If there was an error loading the config file, show it. | |
| 49 DialogResult result = MessageBox.Show("Could not load servers. Please fix or delete the file " + monitor.ConfigFile + Environment.NewLine + Environment.NewLine | |
| 50 + "Error details:" + Environment.NewLine + ex.GetAllMessages(), | |
| 51 "Error loading servers", MessageBoxButtons.RetryCancel, MessageBoxIcon.Error); | |
| 52 // If the error message was cancelled, exit. Otherwise, retry by continuing the loop. | |
| 53 if (result == DialogResult.Cancel) | |
| 54 { | |
| 55 Environment.Exit(1); | |
| 56 } | |
| 57 } | |
| 58 } | |
| 59 // Listen to server monitor events. | |
| 60 monitor.CheckStatusChanged += Monitor_CheckStatusChanged; | |
| 61 // Show the servers. | |
| 62 RefreshDisplay(); | |
| 63 // If any servers have encrypted private keys, attempt to open them immediately | |
| 64 // rather than interrupting the user later when they are first used. | |
| 65 CollectPrivateKeyPasswords(); | |
| 66 CheckForUpdate(); | |
| 67 } | |
| 68 | |
| 69 /// <summary>Shows a form to edit or create a server.</summary> | |
| 70 /// <param name="server">The server to edit. If null, a new server will be created.</param> | |
| 71 /// <param name="activate">Whether the server form should be activated.</param> | |
| 72 /// <returns>The created or existing server for for the server.</returns> | |
| 73 private ServerForm ShowServerForm(Server server, bool activate = true) | |
| 74 { | |
| 75 bool isNewServer = false; | |
| 76 if (server == null) | |
| 77 { | |
| 78 // Create a new server if none was given. | |
| 79 server = new Server(); | |
| 80 // The server is added to the server monitor immediately so that | |
| 81 // checks can be created and run. If the server was created by | |
| 82 // mistake, it will automatically be removed when the form is closed | |
| 83 // as long as no information was entered into the form. | |
| 84 monitor.AddServer(server); | |
| 85 isNewServer = true; | |
| 86 } | |
| 87 if (serverForms.TryGetValue(server, out ServerForm form)) | |
| 88 { | |
| 89 // If the server form is already open, just activate it if requested. | |
| 90 if (activate) | |
| 91 form.Activate(); | |
| 92 } | |
| 93 else | |
| 94 { | |
| 95 // Open a new server form for the server. | |
| 96 form = new ServerForm(monitor, server, isNewServer); | |
| 97 // Keep track of the form so it can be activated later if the server is clicked again. | |
| 98 serverForms[server] = form; | |
| 99 form.FormClosing += ServerForm_FormClosing; | |
| 100 form.Show(activate); | |
| 101 } | |
| 102 return form; | |
| 103 } | |
| 104 | |
| 105 /// <summary>Refreshes the server list with the server monitor data.</summary> | |
| 106 private void RefreshDisplay() | |
| 107 { | |
| 108 // Delete all server controls and recreate them. | |
| 109 ServerPanel.Controls.Clear(); | |
| 110 foreach (Server server in monitor.Servers) | |
| 111 { | |
| 112 // Subscribe to server events. | |
| 113 server.EnabledChanged -= Server_EnabledChanged; | |
| 114 server.EnabledChanged += Server_EnabledChanged; | |
| 115 // Create a server control and add it to the panel. | |
| 116 ServerSummaryControl control = new ServerSummaryControl(server); | |
| 117 control.ContextMenuStrip = ServerContextMenu; | |
| 118 control.Click += ServerSummaryControl_Click; | |
| 119 ServerPanel.Controls.Add(control); | |
| 120 } | |
| 121 // Refresh the form icon that depends on the status of all servers. | |
| 122 UpdateIcon(); | |
| 123 } | |
| 124 | |
| 125 /// <summary>Refreshes a single server control.</summary> | |
| 126 /// <param name="server">The server to refresh.</param> | |
| 127 private void RefreshServer(Server server) | |
| 128 { | |
| 129 ServerPanel.Controls.Cast<ServerSummaryControl>().FirstOrDefault(c => c.Server == server).Refresh(); | |
| 130 // The server's status might have changed, so refresh the form icon. | |
| 131 UpdateIcon(); | |
| 132 } | |
| 133 | |
| 134 /// <summary>Flashes the taskbar button for a server form.</summary> | |
| 135 /// <param name="check">The check that needs attention.</param> | |
| 4 | 136 public void AlertServerForm(Check check) |
| 137 { | |
| 16 | 138 // Show the form, but don't activate it since the user did not initiate this event. |
| 4 | 139 ServerForm form = ShowServerForm(check.Server, false); |
| 16 | 140 // Flash the taskbar button. |
| 4 | 141 Win32Helpers.FlashWindowEx(form); |
| 16 | 142 // If the form was not already open, focus the Log tab and display |
| 143 // only the log entries for this check. Do not do this if the form | |
| 144 // was already open since the user might be in the middle of doing | |
| 145 // something with it. | |
| 146 if (!serverForms.ContainsKey(check.Server)) | |
| 4 | 147 { |
| 148 form.ShowLog(check); | |
| 149 } | |
| 150 } | |
| 151 | |
| 16 | 152 /// <summary>Shows a balloon popup with the results of a failed check.</summary> |
| 153 /// <param name="check">The check that failed.</param> | |
| 4 | 154 public void ShowBalloon(CheckResult result) |
| 155 { | |
| 156 string title = string.Format("{0}: {1} failed", result.Check.Server.Name, result.Check.Name); | |
| 157 NotifyIcon.Tag = result; | |
| 158 NotifyIcon.ShowBalloonTip(30000, title, result.Message, GetToolTipIcon(result.CheckStatus)); | |
| 159 } | |
| 160 | |
| 16 | 161 /// <summary>Updates the form icon to reflect a summary of the status of all servers.</summary> |
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162 private void UpdateIcon() |
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163 { |
| 16 | 164 // The status for the summary icon is the most severe status of all servers. |
| 165 // When performing the comparison: | |
| 166 // - Enabled servers use their current status. | |
| 167 // - If a server is disabled due to a locked private key, report a warning. | |
| 168 // Otherwise, report success to effectively ignore it. | |
| 169 // The integer value of the CheckStatus enum increases with the severity, | |
| 170 // so the maximum value of all servers gives the most severe status. | |
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171 CheckStatus status = monitor.Servers |
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172 .Select(s => s.Enabled |
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173 ? s.Status |
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174 : s.KeyStatus == KeyStatus.NeedPassword ? CheckStatus.Warning : CheckStatus.Success) |
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175 .DefaultIfEmpty(CheckStatus.Success) |
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176 .Max(); |
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177 Icon = status.GetIcon(); |
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178 NotifyIcon.Icon = Icon; |
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179 } |
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180 |
| 16 | 181 /// <summary>Prompts the user for the passwords to open all encrypted private keys.</summary> |
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182 private void CollectPrivateKeyPasswords() |
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183 { |
| 16 | 184 // List of paths to keyfiles. |
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185 List<string> triedKeys = new List<string>(); |
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186 foreach (Server server in monitor.Servers) |
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187 { |
| 16 | 188 // If the same private key is used for multiple servers, don't prompt |
| 189 // the user multiple times to open the same keyfile. | |
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190 if (triedKeys.Contains(server.KeyFile)) |
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191 continue; |
| 16 | 192 // Show the prompt. |
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193 ServerForm.OpenPrivateKey(monitor, server, this); |
| 16 | 194 // Keep track of the keyfile so we don't needlessly ask again. |
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195 triedKeys.Add(server.KeyFile); |
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196 } |
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197 } |
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198 |
| 16 | 199 /// <summary>Refreshes a server control when the server state changes.</summary> |
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200 private void Server_EnabledChanged(object sender, EventArgs e) |
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201 { |
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202 RefreshServer((Server)sender); |
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203 } |
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204 |
| 16 | 205 /// <summary>Refreshes a server control when the server status might have changed.</summary> |
| 4 | 206 private void Monitor_CheckStatusChanged(object sender, CheckStatusChangedEventArgs e) |
| 207 { | |
| 208 if (e.CheckResult != null) | |
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209 { |
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210 RefreshServer(e.Check.Server); |
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211 } |
| 4 | 212 } |
| 213 | |
| 16 | 214 /// <summary>Gets a Windows tooltip icon based on the severity of the message.</summary> |
| 215 /// <param name="status">The status of the check that will be reported in the balloon tip.</param> | |
| 4 | 216 private ToolTipIcon GetToolTipIcon(CheckStatus status) |
| 217 { | |
| 218 switch (status) | |
| 219 { | |
| 220 case CheckStatus.Error: return ToolTipIcon.Error; | |
| 221 case CheckStatus.Warning: return ToolTipIcon.Warning; | |
| 222 case CheckStatus.Information: return ToolTipIcon.Info; | |
| 223 default: return ToolTipIcon.None; | |
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224 } |
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225 } |
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226 |
| 16 | 227 /// <summary>Shows a server form when a server control is clicked.</summary> |
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228 private void ServerSummaryControl_Click(object sender, EventArgs e) |
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229 { |
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230 ShowServerForm(((ServerSummaryControl)sender).Server); |
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231 } |
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232 |
| 16 | 233 /// <summary>Handles the closing of a server form.</summary> |
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234 private void ServerForm_FormClosing(object sender, FormClosingEventArgs e) |
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235 { |
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236 ServerForm form = (ServerForm)sender; |
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237 form.FormClosing -= ServerForm_FormClosing; |
| 4 | 238 Server server = form.Server; |
| 16 | 239 // Remove the closed form from the list of open forms. |
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240 serverForms.Remove(form.Server); |
| 16 | 241 // If there is no user data associated with the server, it can be deleted. |
| 242 // This usually happens when the New Server button is clicked and the server form | |
| 243 // is closed without entering any information. | |
| 4 | 244 if (server.IsEmpty()) |
| 245 { | |
| 246 monitor.DeleteServer(server); | |
| 247 } | |
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248 RefreshDisplay(); |
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249 } |
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250 |
| 16 | 251 /// <summary>Shows a server form to create a new server.</summary> |
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252 private void NewServerButton_Click(object sender, EventArgs e) |
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253 { |
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254 ShowServerForm(null); |
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255 } |
| 4 | 256 |
| 16 | 257 /// <summary>Hides the main form instead of exiting the application based on user preferences.</summary> |
| 258 /// <remarks>Allows the monitor to run in the background without being shown in the taskbar.</remarks> | |
| 4 | 259 private void ServerSummaryForm_FormClosing(object sender, FormClosingEventArgs e) |
| 260 { | |
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261 if ((e.CloseReason == CloseReason.None || e.CloseReason == CloseReason.UserClosing) && Settings.Default.HideToNotificationArea) |
| 4 | 262 { |
| 263 Hide(); | |
| 264 e.Cancel = true; | |
| 265 } | |
| 266 } | |
| 267 | |
| 16 | 268 /// <summary>Shows the settings form.</summary> |
| 4 | 269 private void SettingsButton_Click(object sender, EventArgs e) |
| 270 { | |
| 271 new SettingsForm().Show(); | |
| 272 } | |
| 273 | |
| 16 | 274 /// <summary>Shows the details of a failed check when the balloon notification is clicked.</summary> |
| 4 | 275 private void NotifyIcon_BalloonTipClicked(object sender, EventArgs e) |
| 276 { | |
| 277 CheckResult result = (CheckResult)(sender as NotifyIcon).Tag; | |
| 278 ServerForm form = ShowServerForm(result.Check.Server); | |
| 279 form.ShowLog(result.Check); | |
| 280 form.WindowState = FormWindowState.Normal; | |
| 281 } | |
| 282 | |
| 16 | 283 /// <summary>Handles the server context menu.</summary> |
| 4 | 284 private void ServerContextMenu_ItemClicked(object sender, ToolStripItemClickedEventArgs e) |
| 285 { | |
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286 Server server = GetClickedServer((ContextMenuStrip)e.ClickedItem.Owner); |
| 4 | 287 if (e.ClickedItem == DeleteServerMenuItem) |
| 288 { | |
| 16 | 289 // Close the menu immediately so it doesn't stay open while the messagebox is shown. |
| 4 | 290 ServerContextMenu.Close(); |
| 16 | 291 // Show the server delete confirmation dialog. No option to not ask again |
| 292 // since it's a rare and very destructive event. | |
| 4 | 293 DialogResult result = MessageBox.Show( |
| 294 string.Format("The server \"{0}\" and its {1} {2} will be deleted.", server.Name, server.Checks.Count, server.Checks.Count == 1 ? "check" : "checks"), | |
| 295 "Delete server", | |
| 296 MessageBoxButtons.OKCancel, | |
| 16 | 297 MessageBoxIcon.Warning); |
| 4 | 298 if (result == DialogResult.OK) |
| 299 { | |
| 300 monitor.DeleteServer(server); | |
| 301 RefreshDisplay(); | |
| 302 } | |
| 303 } | |
| 304 else if (e.ClickedItem == ToggleEnableServerMenuItem) | |
| 305 { | |
| 306 bool enable = ToggleEnableServerMenuItem.Text == "Enable"; | |
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307 if (enable) |
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308 { |
| 16 | 309 // Close the menu immediately so it doesn't stay open while the messagebox is shown. |
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310 ServerContextMenu.Close(); |
| 16 | 311 // Attempt to open the private key for the server immediately since it has not |
| 312 // been opened yet. | |
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313 ServerForm.OpenPrivateKey(monitor, server, this); |
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314 } |
| 4 | 315 server.Enabled = enable; |
| 316 RefreshDisplay(); | |
| 317 } | |
| 318 } | |
| 319 | |
| 16 | 320 /// <summary>Activates the appropriate Enable/Disable menu option based on the server's current state.</summary> |
| 4 | 321 private void ServerContextMenu_Opening(object sender, CancelEventArgs e) |
| 322 { | |
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323 Server server = GetClickedServer((ContextMenuStrip)sender); |
| 4 | 324 ToggleEnableServerMenuItem.Text = server.Enabled ? "Disable" : "Enable"; |
| 325 } | |
| 326 | |
| 16 | 327 /// <summary>Gets the server corresponding to a server context menu.</summary> |
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328 private Server GetClickedServer(ContextMenuStrip menu) |
| 4 | 329 { |
| 330 return ((ServerSummaryControl)menu.SourceControl).Server; | |
| 331 } | |
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332 |
| 16 | 333 /// <summary>Saves the window size after it is resized so it can be restored next time the program is run.</summary> |
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334 private void ServerSummaryForm_ResizeEnd(object sender, EventArgs e) |
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335 { |
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336 Settings.Default.SummaryFormSize = Size; |
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337 Settings.Default.Save(); |
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338 } |
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339 |
| 16 | 340 /// <summary>Shows the main form when the WM_SHOWMONITOR message is received.</summary> |
| 341 /// <remarks> | |
| 342 /// This is used to make this a single-instance application. When a second copy of the program | |
| 343 /// is launched, it sends this message to activate the first copy and then exits. | |
| 344 /// </remarks> | |
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345 protected override void WndProc(ref Message m) |
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346 { |
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347 if (m.Msg == Win32Helpers.WM_SHOWMONITOR) |
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348 ShowWindow(); |
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349 base.WndProc(ref m); |
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350 } |
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351 |
| 16 | 352 /// <summary>Handles clicks on the notification area icon.</summary> |
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353 private void NotifyIcon_MouseClick(object sender, MouseEventArgs e) |
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354 { |
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355 if (e.Button == MouseButtons.Left) |
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356 ShowWindow(); |
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357 else if (e.Button == MouseButtons.Right) |
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358 NotificationIconMenu.Show(); |
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359 } |
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360 |
| 16 | 361 /// <summary>Shows the window.</summary> |
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362 private void ShowWindow() |
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363 { |
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364 if (WindowState == FormWindowState.Minimized) |
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365 WindowState = FormWindowState.Normal; |
| 16 | 366 // Do various things to try to get this window on top. |
| 367 // We only do this as a result of user input, so it's ok. ;) | |
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368 Show(); |
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369 TopMost = true; |
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370 TopMost = false; |
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371 Activate(); |
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372 } |
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373 |
| 16 | 374 /// <summary>Handles clicks on the notification icon menu.</summary> |
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375 private void NotificationIconMenu_ItemClicked(object sender, ToolStripItemClickedEventArgs e) |
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376 { |
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377 if (e.ClickedItem == ShowServerMonitorMenuItem) |
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378 ShowWindow(); |
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379 else if (e.ClickedItem == ExitMenuItem) |
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380 Application.Exit(); |
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381 } |
| 10 | 382 |
| 16 | 383 /// <summary>Begins checking for program updates in the background.</summary> |
| 10 | 384 private void CheckForUpdate() |
| 385 { | |
| 386 UpdateManager manager = UpdateManager.Instance; | |
| 16 | 387 // Make the update manager happy if the program was just restarted to apply an update. |
| 10 | 388 manager.ReinstateIfRestarted(); |
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389 manager.UpdateSource = new SimpleWebSource("https://www.bgreco.net/test/servermonitor.xml"); |
| 10 | 390 if (manager.State == UpdateManager.UpdateProcessState.NotChecked) |
| 391 manager.BeginCheckForUpdates(CheckForUpdatesCallback, null); | |
| 392 } | |
| 393 | |
| 16 | 394 /// <summary>Callback after the program update check completes.</summary> |
| 10 | 395 private void CheckForUpdatesCallback(IAsyncResult result) |
| 396 { | |
| 397 UpdateManager manager = UpdateManager.Instance; | |
| 398 if (manager.UpdatesAvailable > 0) | |
| 399 { | |
| 16 | 400 // Extract the new version number from the result. |
| 10 | 401 GetUpdateInfo(out string version, out string _); |
| 16 | 402 // If the user has not chosen to ignore this update, show a notification. |
| 10 | 403 if (Settings.Default.IgnoreUpdate != version) |
| 404 Invoke((MethodInvoker)(() => UpdatePanel.Show())); | |
| 405 } | |
| 406 } | |
| 407 | |
| 16 | 408 /// <summary>Applies the program updates.</summary> |
| 10 | 409 private void PrepareUpdatesCallback(IAsyncResult result) |
| 410 { | |
| 411 UpdateManager manager = UpdateManager.Instance; | |
| 412 manager.EndCheckForUpdates(result); | |
| 413 manager.ApplyUpdates(true); | |
| 414 } | |
| 415 | |
| 16 | 416 /// <summary>Shows information about a program update when the notification is clicked.</summary> |
| 10 | 417 private void UpdateLabel_Click(object sender, EventArgs e) |
| 418 { | |
| 16 | 419 // Extract the update information from the update manager result. |
| 10 | 420 GetUpdateInfo(out string version, out string changeMessage); |
| 421 string message = "Server Monitor version {0} is available for download." + Environment.NewLine | |
| 422 + Environment.NewLine | |
| 423 + "What's new:" + Environment.NewLine | |
| 424 + "{1}" + Environment.NewLine | |
| 425 + Environment.NewLine | |
| 426 + "Would you like to download and apply the update now?"; | |
| 427 using (UpdateDialog dialog = new UpdateDialog { Message = string.Format(message, version, changeMessage) }) | |
| 428 { | |
| 429 DialogResult result = dialog.ShowDialog(); | |
| 16 | 430 // If the user declined the update and asked not to be notified again, |
| 431 // save the preference so they will not be asked again for this version. | |
| 10 | 432 if (dialog.Checked && result == DialogResult.Cancel) |
| 433 { | |
| 434 Settings.Default.IgnoreUpdate = version; | |
| 435 Settings.Default.Save(); | |
| 436 UpdatePanel.Hide(); | |
| 437 } | |
| 16 | 438 // If Yes was not chosen, do not apply the update. |
| 10 | 439 if (result != DialogResult.OK) |
| 440 return; | |
| 441 } | |
| 442 UpdateManager.Instance.BeginPrepareUpdates(PrepareUpdatesCallback, null); | |
| 443 } | |
| 444 | |
| 16 | 445 /// <summary>Extracts the update information from the update manager result.</summary> |
| 10 | 446 private void GetUpdateInfo(out string version, out string changeMessage) |
| 447 { | |
| 16 | 448 // The update description is in the form {version}:{change message}. |
| 10 | 449 string[] parts = UpdateManager.Instance.Tasks.First().Description.Split(new char[] { ':' }, 2); |
| 450 version = parts[0]; | |
| 451 changeMessage = parts[1]; | |
| 452 } | |
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453 } |
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454 } |