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1/////////////////////////////////////////////////////////////////////////////
2// Name: app.h
e54c96f1 3// Purpose: interface of wxApp
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4// Author: wxWidgets team
5// RCS-ID: $Id$
6// Licence: wxWindows license
7/////////////////////////////////////////////////////////////////////////////
8
8064223b 9
23324ae1 10/**
8064223b 11 @class wxAppConsole
7c913512 12
8064223b 13 This class is essential for writing console-only or hybrid apps without
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14 having to define @c wxUSE_GUI=0.
15
16 It is used to:
17 @li set and get application-wide properties (see wxAppConsole::CreateTraits
18 and wxAppConsole::SetXXX functions)
19 @li implement the windowing system message or event loop: events in fact are
20 supported even in console-mode applications (see wxAppConsole::HandleEvent
21 and wxAppConsole::ProcessPendingEvents);
22 @li initiate application processing via wxApp::OnInit;
23 @li allow default processing of events not handled by other
24 objects in the application (see wxAppConsole::FilterEvent)
25 @li implement Apple-specific event handlers (see wxAppConsole::MacXXX functions)
26
27 You should use the macro IMPLEMENT_APP(appClass) in your application
28 implementation file to tell wxWidgets how to create an instance of your
29 application class.
7c913512 30
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31 Use DECLARE_APP(appClass) in a header file if you want the ::wxGetApp() function
32 (which returns a reference to your application object) to be visible to other
33 files.
7c913512 34
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35 @library{wxbase}
36 @category{appmanagement}
7c913512 37
84094285 38 @see @ref overview_app, wxApp, wxAppTraits, wxEventLoopBase
23324ae1 39*/
8064223b 40class wxAppConsole : public wxEvtHandler
23324ae1 41{
8064223b 42protected:
23324ae1 43 /**
8064223b 44 Creates the wxAppTraits object when GetTraits() needs it for the first time.
23324ae1 45
8064223b 46 @see wxAppTraits
23324ae1 47 */
8064223b 48 virtual wxAppTraits* CreateTraits();
23324ae1 49
8064223b 50public:
3c4f71cc 51
23324ae1 52 /**
8064223b 53 Destructor.
23324ae1 54 */
8064223b 55 virtual ~wxAppConsole();
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56
57 /**
58 Dispatches the next event in the windowing system event queue.
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59 Blocks until an event appears if there are none currently
60 (use Pending() if this is not wanted).
61
23324ae1 62 This can be used for programming event loops, e.g.
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63
64 @code
65 while (app.Pending())
66 Dispatch();
67 @endcode
3c4f71cc 68
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69 @return @false if the event loop should stop and @true otherwise.
70
4cc4bfaf 71 @see Pending()
23324ae1 72 */
8064223b 73 virtual bool Dispatch();
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74
75 /**
76 Call this to explicitly exit the main message (event) loop.
77 You should normally exit the main loop (and the application) by deleting
78 the top window.
79 */
80 virtual void ExitMainLoop();
81
82 /**
83 This function is called before processing any event and allows the application
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84 to preempt the processing of some events.
85
86 If this method returns -1 the event is processed normally, otherwise either
87 @true or @false should be returned and the event processing stops immediately
88 considering that the event had been already processed (for the former return
89 value) or that it is not going to be processed at all (for the latter one).
23324ae1 90 */
8064223b 91 virtual int FilterEvent(wxEvent& event);
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92
93 /**
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94 Returns the user-readable application name.
95
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96 The difference between this string and the one returned by GetAppName()
97 is that this one is meant to be shown to the user and so should be used
98 for the window titles, page headers and so on while the other one
99 should be only used internally, e.g. for the file names or
100 configuration file keys. By default, returns the application name as
101 returned by GetAppName() capitalized using wxString::Capitalize().
3c4f71cc 102
1e24c2af 103 @since 2.9.0
23324ae1 104 */
328f5751 105 wxString GetAppDisplayName() const;
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106
107 /**
108 Returns the application name.
3c4f71cc 109
23324ae1 110 @remarks wxWidgets sets this to a reasonable default before calling
4cc4bfaf 111 OnInit(), but the application can reset it at will.
3c4f71cc 112
4cc4bfaf 113 @see GetAppDisplayName()
23324ae1 114 */
328f5751 115 wxString GetAppName() const;
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116
117 /**
118 Gets the class name of the application. The class name may be used in a
96d7cc9b 119 platform specific manner to refer to the application.
3c4f71cc 120
4cc4bfaf 121 @see SetClassName()
23324ae1 122 */
328f5751 123 wxString GetClassName() const;
23324ae1 124
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125 /**
126 Returns the one and only global application object.
fac938f8 127 Usually wxTheApp is used instead.
3c4f71cc 128
4cc4bfaf 129 @see SetInstance()
23324ae1 130 */
4cc4bfaf 131 static wxAppConsole* GetInstance();
23324ae1 132
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133 /**
134 Returns a pointer to the wxAppTraits object for the application.
135 If you want to customize the wxAppTraits object, you must override the
136 CreateTraits() function.
137 */
4cc4bfaf 138 wxAppTraits* GetTraits();
23324ae1 139
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140 /**
141 Returns the user-readable vendor name. The difference between this string
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142 and the one returned by GetVendorName() is that this one is meant to be shown
143 to the user and so should be used for the window titles, page headers and so on
144 while the other one should be only used internally, e.g. for the file names or
145 configuration file keys.
146
23324ae1 147 By default, returns the same string as GetVendorName().
3c4f71cc 148
1e24c2af 149 @since 2.9.0
23324ae1 150 */
8064223b 151 const wxString& GetVendorDisplayName() const;
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152
153 /**
154 Returns the application's vendor name.
155 */
8064223b 156 const wxString& GetVendorName() const;
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157
158 /**
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159 This function simply invokes the given method @a func of the specified
160 event handler @a handler with the @a event as parameter. It exists solely
23324ae1 161 to allow to catch the C++ exceptions which could be thrown by all event
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162 handlers in the application in one place: if you want to do this, override
163 this function in your wxApp-derived class and add try/catch clause(s) to it.
23324ae1 164 */
8064223b 165 virtual void HandleEvent(wxEvtHandler* handler,
23324ae1 166 wxEventFunction func,
328f5751 167 wxEvent& event) const;
23324ae1 168
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169 /**
170 Returns @true if the main event loop is currently running, i.e. if the
171 application is inside OnRun().
96d7cc9b 172
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173 This can be useful to test whether events can be dispatched. For example,
174 if this function returns @false, non-blocking sockets cannot be used because
175 the events from them would never be processed.
176 */
177 static bool IsMainLoopRunning();
178
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179 /**
180 Returns @true if called from inside Yield().
181 */
182 bool IsYielding() const;
183
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184 /**
185 Process all pending events; it is necessary to call this function to
186 process posted events.
187
188 This happens during each event loop iteration in GUI mode but if there is
189 no main loop, it may be also called directly.
190 */
191 virtual void ProcessPendingEvents();
192
23324ae1 193 /**
d9faa1fe 194 Called in response of an "open-application" Apple event.
23324ae1 195 Override this to create a new document in your app.
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196
197 @onlyfor{wxmac}
23324ae1 198 */
8064223b 199 virtual void MacNewFile();
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200
201 /**
d9faa1fe 202 Called in response of an "open-document" Apple event.
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203
204 You need to override this method in order to open a document file after the
205 user double clicked on it or if the document file was dropped on either the
206 running application or the application icon in Finder.
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207
208 @onlyfor{wxmac}
23324ae1 209 */
8064223b 210 virtual void MacOpenFile(const wxString& fileName);
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211
212 /**
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213 Called in response of a "get-url" Apple event.
214
215 @onlyfor{wxmac}
23324ae1 216 */
8064223b 217 virtual void MacOpenURL(const wxString& url);
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218
219 /**
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220 Called in response of a "print-document" Apple event.
221
222 @onlyfor{wxmac}
23324ae1 223 */
8064223b 224 virtual void MacPrintFile(const wxString& fileName);
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225
226 /**
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227 Called in response of a "reopen-application" Apple event.
228
229 @onlyfor{wxmac}
23324ae1 230 */
8064223b 231 virtual void MacReopenApp();
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232
233 /**
234 Called by wxWidgets on creation of the application. Override this if you wish
235 to provide your own (environment-dependent) main loop.
3c4f71cc 236
d29a9a8a 237 @return 0 under X, and the wParam of the WM_QUIT message under Windows.
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238 */
239 virtual int MainLoop();
240
241 /**
242 This function is called when an assert failure occurs, i.e. the condition
e54c96f1 243 specified in wxASSERT() macro evaluated to @false.
96d7cc9b 244
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245 It is only called in debug mode (when @c __WXDEBUG__ is defined) as
246 asserts are not left in the release code at all.
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247 The base class version shows the default assert failure dialog box proposing to
248 the user to stop the program, continue or ignore all subsequent asserts.
3c4f71cc 249
7c913512 250 @param file
4cc4bfaf 251 the name of the source file where the assert occurred
7c913512 252 @param line
4cc4bfaf 253 the line number in this file where the assert occurred
7c913512 254 @param func
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255 the name of the function where the assert occurred, may be
256 empty if the compiler doesn't support C99 __FUNCTION__
7c913512 257 @param cond
4cc4bfaf 258 the condition of the failed assert in text form
7c913512 259 @param msg
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260 the message specified as argument to wxASSERT_MSG or wxFAIL_MSG, will
261 be @NULL if just wxASSERT or wxFAIL was used
23324ae1 262 */
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263 virtual void OnAssertFailure(const wxChar *file,
264 int line,
265 const wxChar *func,
266 const wxChar *cond,
267 const wxChar *msg);
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268
269 /**
270 Called when command line parsing fails (i.e. an incorrect command line option
271 was specified by the user). The default behaviour is to show the program usage
272 text and abort the program.
96d7cc9b 273
7c913512 274 Return @true to continue normal execution or @false to return
23324ae1 275 @false from OnInit() thus terminating the program.
3c4f71cc 276
4cc4bfaf 277 @see OnInitCmdLine()
23324ae1 278 */
8064223b 279 virtual bool OnCmdLineError(wxCmdLineParser& parser);
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280
281 /**
282 Called when the help option (@c --help) was specified on the command line.
283 The default behaviour is to show the program usage text and abort the program.
96d7cc9b 284
7c913512 285 Return @true to continue normal execution or @false to return
23324ae1 286 @false from OnInit() thus terminating the program.
3c4f71cc 287
4cc4bfaf 288 @see OnInitCmdLine()
23324ae1 289 */
8064223b 290 virtual bool OnCmdLineHelp(wxCmdLineParser& parser);
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291
292 /**
293 Called after the command line had been successfully parsed. You may override
294 this method to test for the values of the various parameters which could be
295 set from the command line.
96d7cc9b 296
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297 Don't forget to call the base class version unless you want to suppress
298 processing of the standard command line options.
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299 Return @true to continue normal execution or @false to return @false from
300 OnInit() thus terminating the program.
3c4f71cc 301
4cc4bfaf 302 @see OnInitCmdLine()
23324ae1 303 */
8064223b 304 virtual bool OnCmdLineParsed(wxCmdLineParser& parser);
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305
306 /**
307 This function is called if an unhandled exception occurs inside the main
308 application event loop. It can return @true to ignore the exception and to
309 continue running the loop or @false to exit the loop and terminate the
310 program. In the latter case it can also use C++ @c throw keyword to
311 rethrow the current exception.
96d7cc9b 312
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313 The default behaviour of this function is the latter in all ports except under
314 Windows where a dialog is shown to the user which allows him to choose between
315 the different options. You may override this function in your class to do
316 something more appropriate.
96d7cc9b 317
7c913512 318 Finally note that if the exception is rethrown from here, it can be caught in
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319 OnUnhandledException().
320 */
321 virtual bool OnExceptionInMainLoop();
322
323 /**
324 Override this member function for any processing which needs to be
325 done as the application is about to exit. OnExit is called after
326 destroying all application windows and controls, but before
7c913512 327 wxWidgets cleanup. Note that it is not called at all if
23324ae1 328 OnInit() failed.
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329
330 The return value of this function is currently ignored, return the same
331 value as returned by the base class method if you override it.
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332 */
333 virtual int OnExit();
334
335 /**
336 This function may be called if something fatal happens: an unhandled
337 exception under Win32 or a a fatal signal under Unix, for example. However,
7c913512 338 this will not happen by default: you have to explicitly call
e54c96f1 339 wxHandleFatalExceptions() to enable this.
96d7cc9b 340
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341 Generally speaking, this function should only show a message to the user and
342 return. You may attempt to save unsaved data but this is not guaranteed to
343 work and, in fact, probably won't.
3c4f71cc 344
e54c96f1 345 @see wxHandleFatalExceptions()
23324ae1 346 */
8064223b 347 virtual void OnFatalException();
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348
349 /**
350 This must be provided by the application, and will usually create the
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351 application's main window, optionally calling SetTopWindow().
352
353 You may use OnExit() to clean up anything initialized here, provided
23324ae1 354 that the function returns @true.
96d7cc9b 355
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356 Notice that if you want to to use the command line processing provided by
357 wxWidgets you have to call the base class version in the derived class
358 OnInit().
96d7cc9b 359
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360 Return @true to continue processing, @false to exit the application
361 immediately.
362 */
8064223b 363 virtual bool OnInit();
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364
365 /**
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366 Called from OnInit() and may be used to initialize the parser with the
367 command line options for this application. The base class versions adds
368 support for a few standard options only.
23324ae1 369 */
8064223b 370 virtual void OnInitCmdLine(wxCmdLineParser& parser);
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371
372 /**
373 This virtual function is where the execution of a program written in wxWidgets
374 starts. The default implementation just enters the main loop and starts
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375 handling the events until it terminates, either because ExitMainLoop() has
376 been explicitly called or because the last frame has been deleted and
377 GetExitOnFrameDelete() flag is @true (this is the default).
378
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379 The return value of this function becomes the exit code of the program, so it
380 should return 0 in case of successful termination.
381 */
382 virtual int OnRun();
383
384 /**
7c913512 385 This function is called when an unhandled C++ exception occurs inside
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386 OnRun() (the exceptions which occur during the program startup and shutdown
387 might not be caught at all). Notice that by now the main event loop has been
388 terminated and the program will exit, if you want to prevent this from happening
389 (i.e. continue running after catching an exception) you need to override
390 OnExceptionInMainLoop().
391
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392 The default implementation shows information about the exception in debug build
393 but does nothing in the release build.
394 */
395 virtual void OnUnhandledException();
396
397 /**
398 Returns @true if unprocessed events are in the window system event queue.
3c4f71cc 399
4cc4bfaf 400 @see Dispatch()
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401 */
402 virtual bool Pending();
403
8064223b 404 /**
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405 Set the application name to be used in the user-visible places such as
406 window titles.
407
408 See GetAppDisplayName() for more about the differences between the
8064223b 409 display name and name.
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410
411 Notice that if this function is called, the name is used as is, without
412 any capitalization as done by default by GetAppDisplayName().
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413 */
414 void SetAppDisplayName(const wxString& name);
415
416 /**
417 Sets the name of the application. This name should be used for file names,
418 configuration file entries and other internal strings. For the user-visible
419 strings, such as the window titles, the application display name set by
420 SetAppDisplayName() is used instead.
421
422 By default the application name is set to the name of its executable file.
423
424 @see GetAppName()
425 */
426 void SetAppName(const wxString& name);
427
428 /**
429 Sets the class name of the application. This may be used in a platform specific
430 manner to refer to the application.
431
432 @see GetClassName()
433 */
434 void SetClassName(const wxString& name);
435
436 /**
437 Allows external code to modify global ::wxTheApp, but you should really
438 know what you're doing if you call it.
439
440 @param app
441 Replacement for the global application object.
442
443 @see GetInstance()
444 */
445 static void SetInstance(wxAppConsole* app);
446
447 /**
448 Set the vendor name to be used in the user-visible places.
449 See GetVendorDisplayName() for more about the differences between the
450 display name and name.
451 */
452 void SetVendorDisplayName(const wxString& name);
453
454 /**
455 Sets the name of application's vendor. The name will be used
456 in registry access. A default name is set by wxWidgets.
457
458 @see GetVendorName()
459 */
460 void SetVendorName(const wxString& name);
461
462 /**
463 Yields control to pending messages in the windowing system.
464
465 This can be useful, for example, when a time-consuming process writes to a
466 text window. Without an occasional yield, the text window will not be updated
467 properly, and on systems with cooperative multitasking, such as Windows 3.1
468 other processes will not respond.
469
470 Caution should be exercised, however, since yielding may allow the
471 user to perform actions which are not compatible with the current task.
472 Disabling menu items or whole menus during processing can avoid unwanted
473 reentrance of code: see ::wxSafeYield for a better function.
d181e877 474 You can avoid unwanted reentrancies also using IsYielding().
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475
476 Note that Yield() will not flush the message logs. This is intentional as
477 calling Yield() is usually done to quickly update the screen and popping up
478 a message box dialog may be undesirable. If you do wish to flush the log
479 messages immediately (otherwise it will be done during the next idle loop
480 iteration), call wxLog::FlushActive.
481
482 Calling Yield() recursively is normally an error and an assert failure is
483 raised in debug build if such situation is detected. However if the
484 @a onlyIfNeeded parameter is @true, the method will just silently
485 return @false instead.
486 */
487 virtual bool Yield(bool onlyIfNeeded = false);
488
489 /**
490 Number of command line arguments (after environment-specific processing).
491 */
492 int argc;
493
494 /**
495 Command line arguments (after environment-specific processing).
496
497 Under Windows and Linux/Unix, you should parse the command line
498 arguments and check for files to be opened when starting your
499 application. Under OS X, you need to override MacOpenFile()
500 since command line arguments are used differently there.
501
502 You may use the wxCmdLineParser to parse command line arguments.
503 */
504 wxChar** argv;
505};
506
507
508
509
510/**
511 @class wxApp
8064223b 512
f045c7f5 513 The wxApp class represents the application itself when @c wxUSE_GUI=1.
8064223b 514
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515 In addition to the features provided by wxAppConsole it keeps track of
516 the <em>top window</em> (see SetTopWindow()) and adds support for
517 video modes (see SetVideoMode()).
8064223b 518
f045c7f5 519 In general, application-wide settings for GUI-only apps are accessible
84094285 520 from wxApp (or from wxSystemSettings or wxSystemOptions classes).
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521
522 @library{wxbase}
523 @category{appmanagement}
524
84094285 525 @see @ref overview_app, wxAppTraits, wxEventLoopBase, wxSystemSettings
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526*/
527class wxApp : public wxAppConsole
528{
529public:
530 /**
531 Constructor. Called implicitly with a definition of a wxApp object.
532 */
533 wxApp();
534
535 /**
536 Destructor. Will be called implicitly on program exit if the wxApp
537 object is created on the stack.
538 */
539 virtual ~wxApp();
540
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541 /**
542 Get display mode that is used use. This is only used in framebuffer
543 wxWin ports (such as wxMGL or wxDFB).
544 */
545 virtual wxVideoMode GetDisplayMode() const;
546
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547 /**
548 Returns @true if the application will exit when the top-level frame is deleted.
549
550 @see SetExitOnFrameDelete()
551 */
552 bool GetExitOnFrameDelete() const;
553
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554 /**
555 Return the layout direction for the current locale or @c wxLayout_Default
556 if it's unknown.
557 */
558 virtual wxLayoutDirection GetLayoutDirection() const;
559
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560 /**
561 Returns @true if the application will use the best visual on systems that support
562 different visuals, @false otherwise.
563
564 @see SetUseBestVisual()
565 */
566 bool GetUseBestVisual() const;
567
568 /**
569 Returns a pointer to the top window.
570
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571 @remarks
572 If the top window hasn't been set using SetTopWindow(), this function
573 will find the first top-level window (frame or dialog or instance of
574 wxTopLevelWindow) from the internal top level window list and return that.
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575
576 @see SetTopWindow()
577 */
578 virtual wxWindow* GetTopWindow() const;
579
580 /**
581 Returns @true if the application is active, i.e. if one of its windows is
582 currently in the foreground.
583
584 If this function returns @false and you need to attract users attention to
585 the application, you may use wxTopLevelWindow::RequestUserAttention to do it.
586 */
8d483c9b 587 virtual bool IsActive() const;
8064223b 588
23324ae1 589 /**
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590 Windows-only function for processing a message. This function is called
591 from the main message loop, checking for windows that may wish to process it.
592
593 The function returns @true if the message was processed, @false otherwise.
594 If you use wxWidgets with another class library with its own message loop,
595 you should make sure that this function is called to allow wxWidgets to
3c4f71cc 596 receive messages. For example, to allow co-existence with the Microsoft
96d7cc9b 597 Foundation Classes, override the PreTranslateMessage function:
3c4f71cc 598
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599 @code
600 // Provide wxWidgets message loop compatibility
601 BOOL CTheApp::PreTranslateMessage(MSG *msg)
602 {
603 if (wxTheApp && wxTheApp->ProcessMessage((WXMSW *)msg))
604 return true;
605 else
606 return CWinApp::PreTranslateMessage(msg);
607 }
608 @endcode
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609
610 @onlyfor{wxmsw}
23324ae1 611 */
4cc4bfaf 612 bool ProcessMessage(WXMSG* msg);
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613
614 /**
615 Sends idle events to a window and its children.
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616 Please note that this function is internal to wxWidgets and shouldn't be used
617 by user code.
3c4f71cc 618
23324ae1 619 @remarks These functions poll the top-level windows, and their children,
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620 for idle event processing. If @true is returned, more OnIdle
621 processing is requested by one or more window.
3c4f71cc 622
4cc4bfaf 623 @see wxIdleEvent
23324ae1 624 */
8d483c9b 625 virtual bool SendIdleEvents(wxWindow* win, wxIdleEvent& event);
23324ae1 626
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627 /**
628 Set display mode to use. This is only used in framebuffer wxWin
629 ports (such as wxMGL or wxDFB). This method should be called from
630 wxApp::OnInitGui.
631 */
632 virtual bool SetDisplayMode(const wxVideoMode& info);
633
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634 /**
635 Allows the programmer to specify whether the application will exit when the
636 top-level frame is deleted.
3c4f71cc 637
7c913512 638 @param flag
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639 If @true (the default), the application will exit when the top-level frame
640 is deleted. If @false, the application will continue to run.
3c4f71cc 641
96d7cc9b 642 @see GetExitOnFrameDelete(), @ref overview_app_shutdown
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643 */
644 void SetExitOnFrameDelete(bool flag);
645
646 /**
96d7cc9b 647 Allows external code to modify global ::wxTheApp, but you should really
23324ae1 648 know what you're doing if you call it.
3c4f71cc 649
7c913512 650 @param app
4cc4bfaf 651 Replacement for the global application object.
3c4f71cc 652
4cc4bfaf 653 @see GetInstance()
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654 */
655 static void SetInstance(wxAppConsole* app);
656
657 /**
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658 Allows runtime switching of the UI environment theme.
659
660 Currently implemented for wxGTK2-only.
23324ae1 661 Return @true if theme was successfully changed.
3c4f71cc 662
7c913512 663 @param theme
4cc4bfaf 664 The name of the new theme or an absolute path to a gtkrc-theme-file
23324ae1 665 */
8064223b 666 virtual bool SetNativeTheme(const wxString& theme);
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667
668 /**
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669 Sets the 'top' window. You can call this from within OnInit() to let wxWidgets
670 know which is the main window. You don't have to set the top window;
23324ae1 671 it is only a convenience so that (for example) certain dialogs without parents
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672 can use a specific window as the top window.
673
674 If no top window is specified by the application, wxWidgets just uses the
675 first frame or dialog (or better, any wxTopLevelWindow) in its top-level
676 window list, when it needs to use the top window.
677 If you previously called SetTopWindow() and now you need to restore this
678 automatic behaviour you can call @code wxApp::SetTopWindow(NULL) @endcode.
3c4f71cc 679
7c913512 680 @param window
4cc4bfaf 681 The new top window.
3c4f71cc 682
4cc4bfaf 683 @see GetTopWindow(), OnInit()
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684 */
685 void SetTopWindow(wxWindow* window);
686
687 /**
688 Allows the programmer to specify whether the application will use the best
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689 visual on systems that support several visual on the same display. This is typically
690 the case under Solaris and IRIX, where the default visual is only 8-bit whereas
691 certain applications are supposed to run in TrueColour mode.
692
693 Note that this function has to be called in the constructor of the wxApp
23324ae1 694 instance and won't have any effect when called later on.
23324ae1 695 This function currently only has effect under GTK.
3c4f71cc 696
7c913512 697 @param flag
4cc4bfaf 698 If @true, the app will use the best visual.
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699 @param forceTrueColour
700 If @true then the application will try to force using a TrueColour
701 visual and abort the app if none is found.
23324ae1 702 */
4cc4bfaf 703 void SetUseBestVisual(bool flag, bool forceTrueColour = false);
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704};
705
706
e54c96f1 707
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708// ============================================================================
709// Global functions/macros
710// ============================================================================
711
23324ae1 712
b21126db 713/** @addtogroup group_funcmacro_rtti */
8af7f7c1 714//@{
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715
716/**
f045c7f5 717 This is used in headers to create a forward declaration of the ::wxGetApp()
8af7f7c1 718 function implemented by IMPLEMENT_APP().
96d7cc9b 719
eea9220d 720 It creates the declaration <tt>className& wxGetApp()</tt>.
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721
722 @header{wx/app.h}
723
23324ae1 724 Example:
4cc4bfaf 725
23324ae1 726 @code
8af7f7c1 727 DECLARE_APP(MyApp)
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728 @endcode
729*/
7baebf86 730#define DECLARE_APP( className )
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731
732/**
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733 This is used in the application class implementation file to make the
734 application class known to wxWidgets for dynamic construction.
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735
736 @header{wx/app.h}
737
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738 Example:
739
740 @code
741 IMPLEMENT_APP(MyApp)
742 @endcode
743
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744 @see DECLARE_APP().
745*/
7baebf86 746#define IMPLEMENT_APP( className )
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747
748//@}
749
750
751
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752/**
753 The global pointer to the singleton wxApp object.
754
755 @see wxApp::GetInstance()
756*/
757wxApp *wxTheApp;
758
759
760
b21126db 761/** @addtogroup group_funcmacro_appinitterm */
39fb8056 762//@{
23324ae1 763
23324ae1 764/**
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765 This function doesn't exist in wxWidgets but it is created by using the
766 IMPLEMENT_APP() macro.
96d7cc9b 767
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768 Thus, before using it anywhere but in the same module where this macro is
769 used, you must make it available using DECLARE_APP().
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770
771 The advantage of using this function compared to directly using the global
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772 ::wxTheApp pointer is that the latter is of type wxApp* and so wouldn't
773 allow you to access the functions specific to your application class but
774 not present in wxApp while wxGetApp() returns the object of the right type.
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775
776 @header{wx/app.h}
23324ae1 777*/
8cd06fb5 778wxAppDerivedClass& wxGetApp();
23324ae1 779
23324ae1 780/**
4cc4bfaf 781 If @a doIt is @true, the fatal exceptions (also known as general protection
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782 faults under Windows or segmentation violations in the Unix world) will be
783 caught and passed to wxApp::OnFatalException.
96d7cc9b 784
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785 By default, i.e. before this function is called, they will be handled in
786 the normal way which usually just means that the application will be
787 terminated. Calling wxHandleFatalExceptions() with @a doIt equal to @false
788 will restore this default behaviour.
4cc4bfaf 789
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790 Notice that this function is only available if @c wxUSE_ON_FATAL_EXCEPTION
791 is 1 and under Windows platform this requires a compiler with support for
792 SEH (structured exception handling) which currently means only Microsoft
793 Visual C++ or a recent Borland C++ version.
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794
795 @header{wx/app.h}
23324ae1 796*/
96d7cc9b 797bool wxHandleFatalExceptions(bool doIt = true);
23324ae1 798
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799/**
800 This function is used in wxBase only and only if you don't create
801 wxApp object at all. In this case you must call it from your
802 @c main() function before calling any other wxWidgets functions.
96d7cc9b 803
23324ae1 804 If the function returns @false the initialization could not be performed,
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805 in this case the library cannot be used and wxUninitialize() shouldn't be
806 called neither.
807
808 This function may be called several times but wxUninitialize() must be
809 called for each successful call to this function.
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810
811 @header{wx/app.h}
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812*/
813bool wxInitialize();
814
815/**
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816 This function is for use in console (wxBase) programs only. It must be called
817 once for each previous successful call to wxInitialize().
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818
819 @header{wx/app.h}
23324ae1 820*/
96d7cc9b 821void wxUninitialize();
23324ae1 822
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823/**
824 This function wakes up the (internal and platform dependent) idle system,
825 i.e. it will force the system to send an idle event even if the system
826 currently @e is idle and thus would not send any idle event until after
827 some other event would get sent. This is also useful for sending events
828 between two threads and is used by the corresponding functions
829 wxPostEvent() and wxEvtHandler::AddPendingEvent().
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830
831 @header{wx/app.h}
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832*/
833void wxWakeUpIdle();
834
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835/**
836 Calls wxApp::Yield.
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837
838 @deprecated
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839 This function is kept only for backwards compatibility. Please use
840 the wxApp::Yield method instead in any new code.
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841
842 @header{wx/app.h}
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843*/
844bool wxYield();
845
39fb8056 846/**
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847 This function is similar to wxYield(), except that it disables the user
848 input to all program windows before calling wxYield() and re-enables it
849 again afterwards. If @a win is not @NULL, this window will remain enabled,
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850 allowing the implementation of some limited user interaction.
851 Returns the result of the call to ::wxYield.
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852
853 @header{wx/app.h}
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854*/
855bool wxSafeYield(wxWindow* win = NULL, bool onlyIfNeeded = false);
23324ae1 856
23324ae1 857/**
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858 This function initializes wxWidgets in a platform-dependent way. Use this if you
859 are not using the default wxWidgets entry code (e.g. main or WinMain).
7c913512 860
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861 For example, you can initialize wxWidgets from an Microsoft Foundation Classes
862 (MFC) application using this function.
863
864 @note This overload of wxEntry is available under all platforms.
865
866 @see wxEntryStart()
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867
868 @header{wx/app.h}
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869*/
870int wxEntry(int& argc, wxChar** argv);
871
872/**
873 See wxEntry(int&,wxChar**) for more info about this function.
874
875 Notice that under Windows CE platform, and only there, the type of @a pCmdLine
876 is @c wchar_t *, otherwise it is @c char *, even in Unicode build.
7c913512 877
23324ae1 878 @remarks To clean up wxWidgets, call wxApp::OnExit followed by the static
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879 function wxApp::CleanUp. For example, if exiting from an MFC application
880 that also uses wxWidgets:
881 @code
882 int CTheApp::ExitInstance()
883 {
884 // OnExit isn't called by CleanUp so must be called explicitly.
885 wxTheApp->OnExit();
886 wxApp::CleanUp();
3c4f71cc 887
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888 return CWinApp::ExitInstance();
889 }
890 @endcode
7c913512 891
027c1c27 892 @header{wx/app.h}
23324ae1 893*/
7c913512 894int wxEntry(HINSTANCE hInstance,
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895 HINSTANCE hPrevInstance = NULL,
896 char* pCmdLine = NULL,
7c913512 897 int nCmdShow = SW_SHOWNORMAL);
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898
899//@}
900
901
902
b21126db 903/** @addtogroup group_funcmacro_procctrl */
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904//@{
905
906/**
907 Exits application after calling wxApp::OnExit.
908
909 Should only be used in an emergency: normally the top-level frame
910 should be deleted (after deleting all other frames) to terminate the
911 application. See wxCloseEvent and wxApp.
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912
913 @header{wx/app.h}
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914*/
915void wxExit();
916
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917//@}
918