mcs/class/Managed.Windows.Forms/System.Windows.Forms/Application.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2004 - 2006 Novell, Inc.
  21 //
  22 // Authors:
  23 //      Peter Bartok    pbartok@novell.com
  24 //      Daniel Nauck    (dna(at)mono-project(dot)de)
  25 //
  26
  27 // COMPLETE
  28
  29 #undef DebugRunLoop
  30
  31 using Microsoft.Win32;
  32 using System;
  33 using System.Drawing;
  34 using System.ComponentModel;
  35 using System.Collections;
  36 using System.Diagnostics;
  37 using System.Globalization;
  38 using System.IO;
  39 using System.Reflection;
  40 using System.Runtime.InteropServices;
  41 using System.Threading;
  42 #if NET_2_0
  43 using System.Text;
  44 using System.Windows.Forms.VisualStyles;
  45 #endif
  46
  47 namespace System.Windows.Forms {
  48         public sealed class Application {
  49                 internal class MWFThread {
  50                         #region Fields
  51                         private ApplicationContext      context;
  52                         private bool                    messageloop_started;
  53                         private bool                    handling_exception;
  54                         private int                     thread_id;
  55
  56                         private static Hashtable        threads = new Hashtable();
  57                         #endregion      // Fields
  58
  59                         #region Constructors
  60                         private MWFThread() {
  61                         }
  62                         #endregion      // Constructors
  63
  64                         #region Properties
  65                         public ApplicationContext Context {
  66                                 get { return context; }
  67                                 set { context = value; }
  68                         }
  69
  70                         public bool MessageLoop {
  71                                 get { return messageloop_started; }
  72                                 set { messageloop_started = value; }
  73                         }
  74
  75                         public bool HandlingException {
  76                                 get { return handling_exception; }
  77                                 set { handling_exception = value; }
  78
  79                         }
  80
  81                         public static int LoopCount {
  82                                 get {
  83                                         lock (threads) {
  84                                                 int loops = 0;
  85
  86                                                 foreach (MWFThread thread in threads.Values) {
  87                                                         if (thread.messageloop_started)
  88                                                                 loops++;
  89                                                 }
  90
  91                                                 return loops;
  92                                         }
  93                                 }
  94                         }
  95
  96                         public static MWFThread Current {
  97                                 get {
  98                                         MWFThread       thread;
  99
 100                                         thread = null;
 101                                         lock (threads) {
 102                                                 thread = (MWFThread)threads[Thread.CurrentThread.GetHashCode()];
 103                                                 if (thread == null) {
 104                                                         thread = new MWFThread();
 105                                                         thread.thread_id = Thread.CurrentThread.GetHashCode();
 106                                                         threads[thread.thread_id] = thread;
 107                                                 }
 108                                         }
 109
 110                                         return thread;
 111                                 }
 112                         }
 113                         #endregion      // Properties
 114
 115                         #region Methods
 116                         public void Exit() {
 117                                 if (context != null) {
 118                                         context.ExitThread();
 119                                 }
 120                                 context = null;
 121
 122                                 if (Application.ThreadExit != null) {
 123                                         Application.ThreadExit(null, EventArgs.Empty);
 124                                 }
 125
 126                                 if (LoopCount == 0) {
 127                                         if (Application.ApplicationExit != null) {
 128                                                 Application.ApplicationExit(null, EventArgs.Empty);
 129                                         }
 130                                 }
 131
 132                                 ((MWFThread)threads[thread_id]).MessageLoop = false;
 133                         }
 134                         #endregion      // Methods
 135                 }
 136
 137                 private static bool                     browser_embedded        = false;
 138                 private static InputLanguage            input_language          = InputLanguage.CurrentInputLanguage;
 139                 private static string                   safe_caption_format     = "{1} - {0} - {2}";
 140                 private static ArrayList                message_filters         = new ArrayList();
 141                 private static FormCollection           forms                   = new FormCollection ();
 142                 private static bool                     use_wait_cursor         = false;
 143
 144 #if NET_2_0
 145                 private static VisualStyleState visual_style_state = VisualStyleState.ClientAndNonClientAreasEnabled;
 146 #endif
 147
 148                 private Application () {
 149                 }
 150
 151                 #region Private Methods
 152                 internal static void CloseForms(Thread thread) {
 153                         #if DebugRunLoop
 154                                 Console.WriteLine("   CloseForms({0}) called", thread);
 155                         #endif
 156
 157                         ArrayList forms_to_close = new ArrayList ();
 158
 159                         lock (forms) {
 160                                 foreach (Form f in forms) {
 161                                         if (thread == null || thread == f.creator_thread)
 162                                                 forms_to_close.Add (f);
 163                                 }
 164
 165                                 foreach (Form f in forms_to_close) {
 166                                         #if DebugRunLoop
 167                                                 Console.WriteLine("      Closing form {0}", f);
 168                                         #endif
 169                                         f.Dispose ();
 170                                 }
 171                         }
 172                 }
 173                 #endregion      // Private methods
 174
 175                 #region Public Static Properties
 176                 public static bool AllowQuit {
 177                         get {
 178                                 return !browser_embedded;
 179                         }
 180                 }
 181
 182                 public static string CommonAppDataPath {
 183                         get {
 184                                 return Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);
 185                         }
 186                 }
 187
 188                 public static RegistryKey CommonAppDataRegistry {
 189                         get {
 190                                 RegistryKey     key;
 191
 192                                 key = Registry.LocalMachine.OpenSubKey("Software\\" + Application.CompanyName + "\\" + Application.ProductName + "\\" + Application.ProductVersion, true);
 193
 194                                 return key;
 195                         }
 196                 }
 197
 198                 public static string CompanyName {
 199                         get {
 200                                 AssemblyCompanyAttribute[] attrs = (AssemblyCompanyAttribute[]) Assembly.GetEntryAssembly().GetCustomAttributes(typeof(AssemblyCompanyAttribute), true);
 201
 202                                 if ((attrs != null) && attrs.Length>0) {
 203                                         return attrs[0].Company;
 204                                 }
 205
 206                                 return Assembly.GetEntryAssembly().GetName().Name;
 207                         }
 208                 }
 209
 210                 public static CultureInfo CurrentCulture {
 211                         get {
 212                                 return Thread.CurrentThread.CurrentUICulture;
 213                         }
 214
 215                         set {
 216
 217                                 Thread.CurrentThread.CurrentUICulture=value;
 218                         }
 219                 }
 220
 221                 public static InputLanguage CurrentInputLanguage {
 222                         get {
 223                                 return input_language;
 224                         }
 225
 226                         set {
 227                                 input_language=value;
 228                         }
 229                 }
 230
 231                 public static string ExecutablePath {
 232                         get {
 233                                 return Assembly.GetEntryAssembly().Location;
 234                         }
 235                 }
 236
 237                 public static string LocalUserAppDataPath {
 238                         get {
 239                                 return Path.Combine(Path.Combine(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), CompanyName), ProductName), ProductVersion);
 240                         }
 241                 }
 242
 243                 public static bool MessageLoop {
 244                         get {
 245                                 return MWFThread.Current.MessageLoop;
 246                         }
 247                 }
 248
 249                 public static string ProductName {
 250                         get {
 251                                 AssemblyProductAttribute[] attrs = (AssemblyProductAttribute[]) Assembly.GetEntryAssembly().GetCustomAttributes(typeof(AssemblyProductAttribute), true);
 252
 253                                 if ((attrs != null) && attrs.Length>0) {
 254                                         return attrs[0].Product;
 255                                 }
 256
 257                                 return Assembly.GetEntryAssembly().GetName().Name;
 258                         }
 259                 }
 260
 261                 public static string ProductVersion {
 262                         get {
 263                                 String version;
 264
 265                                 version = Assembly.GetEntryAssembly().GetName().Version.ToString();
 266
 267                                 return version;
 268                         }
 269                 }
 270
 271                 public static string SafeTopLevelCaptionFormat {
 272                         get {
 273                                 return safe_caption_format;
 274                         }
 275
 276                         set {
 277                                 safe_caption_format=value;
 278                         }
 279                 }
 280
 281                 public static string StartupPath {
 282                         get {
 283                                 return Path.GetDirectoryName(Application.ExecutablePath);
 284                         }
 285                 }
 286
 287                 public static string UserAppDataPath {
 288                         get {
 289                                 return Path.Combine(Path.Combine(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), CompanyName), ProductName), ProductVersion);
 290                         }
 291                 }
 292
 293                 public static RegistryKey UserAppDataRegistry {
 294                         get {
 295                                 RegistryKey     key;
 296
 297                                 key = Registry.CurrentUser.OpenSubKey("Software\\" + Application.CompanyName + "\\" + Application.ProductName + "\\" + Application.ProductVersion, true);
 298
 299                                 return key;
 300                         }
 301                 }
 302
 303 #if NET_2_0
 304
 305                 public static bool UseWaitCursor {
 306                         get {
 307                                 return use_wait_cursor;
 308                         }
 309                         set {
 310                                 use_wait_cursor = value;
 311                                 if (use_wait_cursor) {
 312                                         foreach (Form form in OpenForms) {
 313                                                 form.Cursor = Cursors.WaitCursor;
 314                                         }
 315                                 }
 316                         }
 317                 }
 318
 319                 public static bool RenderWithVisualStyles {
 320                       get {
 321                                 if (VisualStyleInformation.IsSupportedByOS)
 322                                 {
 323                                         if (!VisualStyleInformation.IsEnabledByUser)
 324                                                 return false;
 325
 326                                         if (!XplatUI.ThemesEnabled)
 327                                                 return false;
 328
 329                                         if (Application.VisualStyleState == VisualStyleState.ClientAndNonClientAreasEnabled)
 330                                                 return true;
 331
 332                                         if (Application.VisualStyleState == VisualStyleState.ClientAreaEnabled)
 333                                                 return true;
 334                                 }
 335
 336                                 return false;
 337                       }
 338                 }
 339
 340                 public static VisualStyleState VisualStyleState {
 341                         get { return Application.visual_style_state; }
 342                         set { Application.visual_style_state = value; }
 343                 }
 344 #endif
 345
 346                 #endregion
 347
 348                 #region Public Static Methods
 349                 public static void AddMessageFilter(IMessageFilter value) {
 350                         lock (message_filters) {
 351                                 message_filters.Add(value);
 352                         }
 353                 }
 354
 355                 public static void DoEvents() {
 356                         XplatUI.DoEvents();
 357                 }
 358
 359                 public static void EnableVisualStyles() {
 360                         XplatUI.EnableThemes();
 361                 }
 362
 363 #if NET_2_0
 364                 //
 365                 // If true, it uses GDI+, performance reasons were quoted
 366                 //
 367                 static internal bool use_compatible_text_rendering = true;
 368
 369                 public static void SetCompatibleTextRenderingDefault (bool defaultValue)
 370                 {
 371                         use_compatible_text_rendering = defaultValue;
 372                 }
 373
 374                 public static FormCollection OpenForms {
 375                         get {
 376                                 return forms;
 377                         }
 378                 }
 379
 380                 public static void Restart ()
 381                 {
 382                         //FIXME: ClickOnce stuff using the Update or UpdateAsync methods.
 383                         //FIXME: SecurityPermission: Restart () requires IsUnrestricted permission.
 384
 385                         if (Assembly.GetEntryAssembly () == null)
 386                                 throw new NotSupportedException ("The method 'Restart' is not supported by this application type.");
 387
 388                         string mono_path = null;
 389
 390                         //Get mono path
 391                         PropertyInfo gac = typeof (Environment).GetProperty ("GacPath", BindingFlags.Static | BindingFlags.NonPublic);
 392                         MethodInfo get_gac = null;
 393                         if (gac != null)
 394                                 get_gac = gac.GetGetMethod (true);
 395
 396                         if (get_gac != null) {
 397                                 string gac_path = Path.GetDirectoryName ((string)get_gac.Invoke (null, null));
 398                                 string mono_prefix = Path.GetDirectoryName (Path.GetDirectoryName (gac_path));
 399
 400                                 if (Environment.OSVersion.Platform == PlatformID.Unix) {
 401                                         mono_path = Path.Combine (mono_prefix, "bin/mono");
 402                                         if (!File.Exists (mono_path))
 403                                                 mono_path = "mono";
 404                                 }
 405                                 else {
 406                                         mono_path = Path.Combine (mono_prefix, "bin\\mono.bat");
 407
 408                                         if (!File.Exists (mono_path))
 409                                                 mono_path = Path.Combine (mono_prefix, "bin\\mono.exe");
 410
 411                                         if (!File.Exists (mono_path))
 412                                                 mono_path = Path.Combine (mono_prefix, "mono\\mono\\mini\\mono.exe");
 413
 414                                         if (!File.Exists (mono_path))
 415                                                 throw new FileNotFoundException (string.Format ("Windows mono path not found: '{0}'", mono_path));
 416                                 }
 417                         }
 418
 419                         //Get command line arguments
 420                         StringBuilder argsBuilder = new StringBuilder ();
 421                         string[] args = Environment.GetCommandLineArgs ();
 422                         for (int i = 0; i < args.Length; i++)
 423                         {
 424                                 argsBuilder.Append (string.Format ("\"{0}\" ", args[i]));
 425                         }
 426                         string arguments = argsBuilder.ToString ();
 427                         ProcessStartInfo procInfo = Process.GetCurrentProcess ().StartInfo;
 428
 429                         if (mono_path == null) { //it is .NET on Windows
 430                                 procInfo.FileName = args[0];
 431                                 procInfo.Arguments = arguments.Remove (0, args[0].Length + 3); //1 space and 2 quotes
 432                         }
 433                         else {
 434                                 procInfo.Arguments = arguments;
 435                                 procInfo.FileName = mono_path;
 436                         }
 437
 438                         procInfo.WorkingDirectory = Environment.CurrentDirectory;
 439
 440                         Application.Exit ();
 441                         Process.Start (procInfo);
 442                 }
 443 #endif
 444
 445                 public static void Exit() {
 446                         XplatUI.PostQuitMessage(0);
 447                         CloseForms(null);
 448                 }
 449
 450                 public static void ExitThread() {
 451                         CloseForms(Thread.CurrentThread);
 452                         // this might not be right - need to investigate (somehow) if a WM_QUIT message is generated here
 453                         XplatUI.PostQuitMessage(0);
 454                 }
 455
 456                 public static ApartmentState OleRequired() {
 457                         //throw new NotImplementedException("OLE Not supported by this System.Windows.Forms implementation");
 458                         return ApartmentState.Unknown;
 459                 }
 460
 461                 public static void OnThreadException(Exception t) {
 462                         if (MWFThread.Current.HandlingException) {
 463                                 /* we're already handling an exception and we got
 464                                    another one?  print it out and exit, this means
 465                                    we've got a runtime/SWF bug. */
 466                                 Console.WriteLine (t);
 467                                 Application.Exit();
 468                         }
 469
 470                         MWFThread.Current.HandlingException = true;
 471
 472                         if (Application.ThreadException != null) {
 473                                 Application.ThreadException(null, new ThreadExceptionEventArgs(t));
 474                                 return;
 475                         }
 476
 477                         if (SystemInformation.UserInteractive) {
 478                                 Form form = new ThreadExceptionDialog (t);
 479                                 form.ShowDialog ();
 480                         } else {
 481                                 Console.WriteLine (t.ToString ());
 482                                 Application.Exit ();
 483                         }
 484
 485                         MWFThread.Current.HandlingException = false;
 486                 }
 487
 488                 public static void RemoveMessageFilter(IMessageFilter filter) {
 489                         lock (message_filters) {
 490                                 message_filters.Remove(filter);
 491                         }
 492                 }
 493
 494                 public static void Run() {
 495                         RunLoop(false, new ApplicationContext());
 496                 }
 497
 498                 public static void Run(Form mainForm) {
 499                         RunLoop(false, new ApplicationContext(mainForm));
 500                 }
 501
 502                 public static void Run(ApplicationContext context) {
 503                         RunLoop(false, context);
 504                 }
 505
 506                 internal static void RunLoop(bool Modal, ApplicationContext context) {
 507                         Queue           toplevels;
 508                         IEnumerator     control;
 509                         MSG             msg;
 510                         Object          queue_id;
 511                         MWFThread       thread;
 512
 513                         thread = MWFThread.Current;
 514
 515                         msg = new MSG();
 516
 517                         if (context == null) {
 518                                 context = new ApplicationContext();
 519                         }
 520
 521                         thread.Context = context;
 522
 523                         if (context.MainForm != null) {
 524                                 context.MainForm.is_modal = Modal;
 525                                 context.MainForm.context = context;
 526                                 context.MainForm.closing = false;
 527                                 context.MainForm.Visible = true;        // Cannot use Show() or scaling gets confused by menus
 528                                 // XXX the above line can be used to close the form. another problem with our handling of Show/Activate.
 529                                 if (context.MainForm != null)
 530                                         context.MainForm.Activate();
 531                         }
 532
 533                         #if DebugRunLoop
 534                                 Console.WriteLine("Entering RunLoop(Modal={0}, Form={1})", Modal, context.MainForm != null ? context.MainForm.ToString() : "NULL");
 535                         #endif
 536
 537                         if (Modal) {
 538                                 Form f;
 539
 540                                 toplevels = new Queue();
 541
 542                                 lock (forms) {
 543                                         control = forms.GetEnumerator();
 544
 545                                         while (control.MoveNext()) {
 546                                                 f = (Form)control.Current;
 547
 548                                                 // Don't disable the main form.
 549                                                 if (f == context.MainForm) {
 550                                                         continue;
 551                                                 }
 552
 553                                                 // Don't disable any children of the main form.
 554                                                 // These do not have to be MDI children.
 555                                                 Control current = f;
 556                                                 bool is_child_of_main = false;;
 557
 558                                                 do {
 559                                                         if (current.Parent == context.MainForm) {
 560                                                                 is_child_of_main = true;
 561                                                                 break;
 562                                                         }
 563                                                         current = current.Parent;
 564                                                 } while (current != null);
 565
 566                                                 if (is_child_of_main)
 567                                                         continue;
 568
 569                                                 // Disable the rest
 570                                                 if (f.IsHandleCreated && XplatUI.IsEnabled(f.Handle)) {
 571                                                         #if DebugRunLoop
 572                                                                 Console.WriteLine("      Disabling form {0}", f);
 573                                                         #endif
 574                                                         XplatUI.EnableWindow(f.Handle, false);
 575                                                         toplevels.Enqueue(f);
 576                                                 }
 577                                         }
 578                                 }
 579
 580                                 // FIXME - need activate?
 581                                 /* make sure the MainForm is enabled */
 582                                 if (context.MainForm != null) {
 583                                         XplatUI.EnableWindow (context.MainForm.Handle, true);
 584                                         XplatUI.SetModal(context.MainForm.Handle, true);
 585                                 }
 586                         } else {
 587                                 toplevels = null;
 588                         }
 589
 590                         queue_id = XplatUI.StartLoop(Thread.CurrentThread);
 591                         thread.MessageLoop = true;
 592
 593                         bool quit = false;
 594
 595                         while (!quit && XplatUI.GetMessage(queue_id, ref msg, IntPtr.Zero, 0, 0)) {
 596                                 lock (message_filters) {
 597                                         if (message_filters.Count > 0) {
 598                                                 Message m;
 599                                                 bool    drop;
 600
 601                                                 drop = false;
 602                                                 m = Message.Create(msg.hwnd, (int)msg.message, msg.wParam, msg.lParam);
 603                                                 for (int i = 0; i < message_filters.Count; i++) {
 604                                                         if (((IMessageFilter)message_filters[i]).PreFilterMessage(ref m)) {
 605                                                                 // we're dropping the message
 606                                                                 drop = true;
 607                                                                 break;
 608                                                         }
 609                                                 }
 610                                                 if (drop) {
 611                                                         continue;
 612                                                 }
 613                                         }
 614                                 }
 615
 616                                 switch((Msg)msg.message) {
 617                                 case Msg.WM_KEYDOWN:
 618                                 case Msg.WM_SYSKEYDOWN:
 619                                 case Msg.WM_CHAR:
 620                                 case Msg.WM_SYSCHAR:
 621                                 case Msg.WM_KEYUP:
 622                                 case Msg.WM_SYSKEYUP:
 623                                         Message m;
 624                                         Control c;
 625
 626                                         m = Message.Create(msg.hwnd, (int)msg.message, msg.wParam, msg.lParam);
 627                                         c = Control.FromHandle(msg.hwnd);
 628                                         if ((c != null) && !c.PreProcessMessage(ref m)) {
 629                                                 goto default;
 630                                         }
 631                                         break;
 632                                 case Msg.WM_QUIT:
 633                                         quit = true; // make sure we exit
 634                                         break;
 635                                 default:
 636                                         XplatUI.TranslateMessage(ref msg);
 637                                         XplatUI.DispatchMessage(ref msg);
 638                                         break;
 639                                 }
 640
 641                                 // Handle exit, Form might have received WM_CLOSE and set 'closing' in response
 642                                 if ((context.MainForm != null) && (context.MainForm.closing || (Modal && !context.MainForm.Visible))) {
 643                                         if (!Modal) {
 644                                                 XplatUI.PostQuitMessage(0);
 645                                         } else {
 646                                                 break;
 647                                         }
 648                                 }
 649                         }
 650                         #if DebugRunLoop
 651                                 Console.WriteLine("   RunLoop loop left");
 652                         #endif
 653
 654                         thread.MessageLoop = false;
 655                         XplatUI.EndLoop(Thread.CurrentThread);
 656
 657                         if (Modal) {
 658                                 Form c;
 659
 660                                 Form old = context.MainForm;
 661
 662                                 context.MainForm = null;
 663
 664                                 while (toplevels.Count>0) {
 665                                         #if DebugRunLoop
 666                                                 Console.WriteLine("      Re-Enabling form form {0}", toplevels.Peek());
 667                                         #endif
 668                                         c = (Form)toplevels.Dequeue();
 669                                         if (c.IsHandleCreated) {
 670                                                 XplatUI.EnableWindow(c.window.Handle, true);
 671                                                 context.MainForm = c;
 672                                         }
 673                                 }
 674                                 #if DebugRunLoop
 675                                         Console.WriteLine("   Done with the re-enable");
 676                                 #endif
 677                                 if (context.MainForm != null && context.MainForm.IsHandleCreated) {
 678                                         XplatUI.SetModal(context.MainForm.Handle, false);
 679                                 }
 680                                 #if DebugRunLoop
 681                                         Console.WriteLine("   Done with the SetModal");
 682                                 #endif
 683                                 old.Close();
 684                                 old.is_modal = false;
 685                         }
 686
 687                         #if DebugRunLoop
 688                                 Console.WriteLine("Leaving RunLoop(Modal={0}, Form={1})", Modal, context.MainForm != null ? context.MainForm.ToString() : "NULL");
 689                         #endif
 690                         if (context.MainForm != null) {
 691                                 context.MainForm.context = null;
 692                                 context.MainForm = null;
 693                         }
 694
 695                         if (!Modal) {
 696                                 thread.Exit();
 697                         }
 698                 }
 699
 700                 #endregion      // Public Static Methods
 701
 702                 #region Events
 703                 public static event EventHandler        ApplicationExit;
 704
 705                 public static event EventHandler        Idle {
 706                         add {
 707                                 XplatUI.Idle += value;
 708                         }
 709                         remove {
 710                                 XplatUI.Idle -= value;
 711                         }
 712                 }
 713
 714                 public static event EventHandler        ThreadExit;
 715                 public static event ThreadExceptionEventHandler ThreadException;
 716
 717 #if NET_2_0
 718                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 719                 public static event EventHandler EnterThreadModal;
 720
 721                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 722                 public static event EventHandler LeaveThreadModal;
 723 #endif
 724                 #endregion      // Events
 725
 726                 #region Internal Methods
 727                 internal static void AddForm (Form f)
 728                 {
 729                         lock (forms)
 730                                 forms.Add (f);
 731                 }
 732
 733                 internal static void RemoveForm (Form f)
 734                 {
 735                         lock (forms)
 736                                 forms.Remove (f);
 737                 }
 738                 #endregion
 739         }
 740 }