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c801d85f 1/////////////////////////////////////////////////////////////////////////////
090a6d7a 2// Name: wx/app.h
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3// Purpose: wxAppBase class and macros used for declaration of wxApp
4// derived class in the user code
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5// Author: Julian Smart
6// Modified by:
7// Created: 01/02/97
8// RCS-ID: $Id$
9// Copyright: (c) Julian Smart and Markus Holzem
094637f6 10// Licence: wxWindows licence
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11/////////////////////////////////////////////////////////////////////////////
12
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13#ifndef _WX_APP_H_BASE_
14#define _WX_APP_H_BASE_
c801d85f 15
af49c4b8 16#if defined(__GNUG__) && !defined(__APPLE__)
094637f6 17 #pragma interface "appbase.h"
10b959e3 18#endif
c801d85f 19
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20// ----------------------------------------------------------------------------
21// typedefs
22// ----------------------------------------------------------------------------
23
04ef50df 24#if (defined(__WXMSW__) && !defined(__WXMICROWIN__)) || defined (__WXPM__)
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25 class WXDLLEXPORT wxApp;
26 typedef wxApp* (*wxAppInitializerFunction)();
27#else
28 // returning wxApp* won't work with gcc
29 #include "wx/object.h"
c801d85f 30
094637f6 31 typedef wxObject* (*wxAppInitializerFunction)();
10b959e3 32#endif
c801d85f 33
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34class WXDLLEXPORT wxCmdLineParser;
35
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36// ----------------------------------------------------------------------------
37// headers we have to include here
38// ----------------------------------------------------------------------------
39
40#include "wx/event.h" // for the base class
41
e90c1d2a 42#if wxUSE_GUI
bf188f1a 43 #include "wx/window.h" // for wxTopLevelWindows
e90c1d2a 44#endif // wxUSE_GUI
23280650 45
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46#if WXWIN_COMPATIBILITY_2_2
47 #include "wx/icon.h"
48#endif
49
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50#include "wx/build.h"
51
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52class WXDLLEXPORT wxLog;
53class WXDLLEXPORT wxMessageOutput;
54
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55// ----------------------------------------------------------------------------
56// constants
57// ----------------------------------------------------------------------------
58
59static const int wxPRINT_WINDOWS = 1;
60static const int wxPRINT_POSTSCRIPT = 2;
61
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62// ----------------------------------------------------------------------------
63// support for framebuffer ports
64// ----------------------------------------------------------------------------
65
66#if wxUSE_GUI
67// VS: Fullscreen/framebuffer application needs to choose display mode prior
68// to wxWindows initialization. This class holds information about display
55176f44 69// mode. It is used by wxApp::Set/GetDisplayMode.
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70class WXDLLEXPORT wxDisplayModeInfo
71{
72public:
73 wxDisplayModeInfo() : m_ok(FALSE) {}
a69be60b 74 wxDisplayModeInfo(unsigned width, unsigned height, unsigned depth)
07082b28 75 : m_width(width), m_height(height), m_depth(depth), m_ok(TRUE) {}
a69be60b 76
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77 unsigned GetWidth() const { return m_width; }
78 unsigned GetHeight() const { return m_height; }
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79 unsigned GetDepth() const { return m_depth; }
80 bool IsOk() const { return m_ok; }
81
82private:
07082b28 83 unsigned m_width, m_height, m_depth;
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84 bool m_ok;
85};
86#endif
87
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88// ----------------------------------------------------------------------------
89// the common part of wxApp implementations for all platforms
90// ----------------------------------------------------------------------------
91
92class WXDLLEXPORT wxAppBase : public wxEvtHandler
93{
be52b341 94 DECLARE_NO_COPY_CLASS(wxAppBase)
a69be60b 95
094637f6 96public:
1e6feb95 97 wxAppBase();
799ea011 98 virtual ~wxAppBase();
1e6feb95 99
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100 // the virtual functions which may/must be overridden in the derived class
101 // -----------------------------------------------------------------------
bf188f1a 102
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103 // called during the program initialization, returning FALSE from here
104 // prevents the program from continuing - it's a good place to create
105 // the top level program window and return TRUE.
106 //
e90c1d2a 107 // Override: always in GUI application, rarely in console ones.
bf188f1a 108 virtual bool OnInit();
094637f6 109
e90c1d2a 110#if wxUSE_GUI
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111 // a platform-dependent version of OnInit(): the code here is likely to
112 // depend on the toolkit. default version does nothing.
113 //
114 // Override: rarely.
1e6feb95 115 virtual bool OnInitGui();
e90c1d2a 116#endif // wxUSE_GUI
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117
118 // called to start program execution - the default version just enters
119 // the main GUI loop in which events are received and processed until
120 // the last window is not deleted (if GetExitOnFrameDelete) or
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121 // ExitMainLoop() is called. In console mode programs, the execution
122 // of the program really starts here
094637f6 123 //
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124 // Override: rarely in GUI applications, always in console ones.
125#if wxUSE_GUI
1cbee0b4 126 virtual int OnRun();
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127#else // !GUI
128 virtual int OnRun() = 0;
129#endif // wxUSE_GUI
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130
131 // called after the main loop termination. This is a good place for
132 // cleaning up (it may be too late in dtor) and is also useful if you
133 // want to return some non-default exit code - this is just the return
134 // value of this method.
135 //
136 // Override: often.
7beba2fc 137 virtual int OnExit();
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138
139 // called when a fatal exception occurs, this function should take care
140 // not to do anything which might provoke a nested exception! It may be
141 // overridden if you wish to react somehow in non-default way (core
142 // dump under Unix, application crash under Windows) to fatal program
143 // errors, however extreme care should be taken if you don't want this
144 // function to crash.
145 //
146 // Override: rarely.
147 virtual void OnFatalException() { }
148
149 // the worker functions - usually not used directly by the user code
150 // -----------------------------------------------------------------
151
e90c1d2a 152#if wxUSE_GUI
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153 // execute the main GUI loop, the function returns when the loop ends
154 virtual int MainLoop() = 0;
155
156 // exit the main GUI loop during the next iteration (i.e. it does not
157 // stop the program immediately!)
158 virtual void ExitMainLoop() = 0;
159
160 // returns TRUE if the program is initialized
161 virtual bool Initialized() = 0;
162
163 // returns TRUE if there are unprocessed events in the event queue
164 virtual bool Pending() = 0;
165
166 // process the first event in the event queue (blocks until an event
167 // apperas if there are none currently)
168 virtual void Dispatch() = 0;
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169
170 // process all currently pending events right now
171 //
172 // it is an error to call Yield() recursively unless the value of
173 // onlyIfNeeded is TRUE
174 //
175 // WARNING: this function is dangerous as it can lead to unexpected
176 // reentrancies (i.e. when called from an event handler it
177 // may result in calling the same event handler again), use
178 // with _extreme_ care or, better, don't use at all!
179 virtual bool Yield(bool onlyIfNeeded = FALSE) = 0;
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180
181 // this virtual function is called in the GUI mode when the application
182 // becomes idle and normally just sends wxIdleEvent to all interested
183 // parties
184 //
185 // it should return TRUE if more idle events are needed, FALSE if not
186 virtual bool ProcessIdle() = 0;
e90c1d2a 187#endif // wxUSE_GUI
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188
189 // application info: name, description, vendor
190 // -------------------------------------------
191
192 // NB: all these should be set by the application itself, there are no
193 // reasonable default except for the application name which is taken to
194 // be argv[0]
195
196 // set/get the application name
197 wxString GetAppName() const
198 {
199 if ( !m_appName )
200 return m_className;
201 else
202 return m_appName;
203 }
204 void SetAppName(const wxString& name) { m_appName = name; }
205
206 // set/get the app class name
207 wxString GetClassName() const { return m_className; }
208 void SetClassName(const wxString& name) { m_className = name; }
209
210 // set/get the vendor name
211 const wxString& GetVendorName() const { return m_vendorName; }
212 void SetVendorName(const wxString& name) { m_vendorName = name; }
213
e90c1d2a 214#if wxUSE_GUI
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215 // top level window functions
216 // --------------------------
217
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218 // return TRUE if our app has focus
219 virtual bool IsActive() const { return m_isActive; }
220
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221 // set the "main" top level window
222 void SetTopWindow(wxWindow *win) { m_topWindow = win; }
223
224 // return the "main" top level window (if it hadn't been set previously
225 // with SetTopWindow(), will return just some top level window and, if
226 // there are none, will return NULL)
83a5b533 227 virtual wxWindow *GetTopWindow() const
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228 {
229 if (m_topWindow)
230 return m_topWindow;
231 else if (wxTopLevelWindows.GetCount() > 0)
232 return wxTopLevelWindows.GetFirst()->GetData();
233 else
234 return (wxWindow *)NULL;
235 }
236
237 // control the exit behaviour: by default, the program will exit the
238 // main loop (and so, usually, terminate) when the last top-level
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239 // program window is deleted. Beware that if you disable this behaviour
240 // (with SetExitOnFrameDelete(FALSE)), you'll have to call
241 // ExitMainLoop() explicitly from somewhere.
242 void SetExitOnFrameDelete(bool flag)
243 { m_exitOnFrameDelete = flag ? Yes : No; }
244 bool GetExitOnFrameDelete() const
245 { return m_exitOnFrameDelete == Yes; }
094637f6 246
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247#endif // wxUSE_GUI
248
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249 // cmd line parsing stuff
250 // ----------------------
251
252 // all of these methods may be overridden in the derived class to
253 // customize the command line parsing (by default only a few standard
254 // options are handled)
255 //
256 // you also need to call wxApp::OnInit() from YourApp::OnInit() for all
257 // this to work
258
259#if wxUSE_CMDLINE_PARSER
260 // this one is called from OnInit() to add all supported options
261 // to the given parser
262 virtual void OnInitCmdLine(wxCmdLineParser& parser);
263
264 // called after successfully parsing the command line, return TRUE
265 // to continue and FALSE to exit
266 virtual bool OnCmdLineParsed(wxCmdLineParser& parser);
267
268 // called if "--help" option was specified, return TRUE to continue
269 // and FALSE to exit
270 virtual bool OnCmdLineHelp(wxCmdLineParser& parser);
271
272 // called if incorrect command line options were given, return
273 // FALSE to abort and TRUE to continue
274 virtual bool OnCmdLineError(wxCmdLineParser& parser);
275#endif // wxUSE_CMDLINE_PARSER
276
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277 // miscellaneous customization functions
278 // -------------------------------------
279
280#if wxUSE_LOG
281 // override this function to create default log target of arbitrary
282 // user-defined class (default implementation creates a wxLogGui
283 // object) - this log object is used by default by all wxLogXXX()
284 // functions.
a69be60b 285 virtual wxLog *CreateLogTarget();
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286#endif // wxUSE_LOG
287
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288 // similar to CreateLogTarget() but for the global wxMessageOutput
289 // object
290 virtual wxMessageOutput *CreateMessageOutput();
291
e90c1d2a 292#if wxUSE_GUI
0e04ef47 293
a69be60b 294#if WXWIN_COMPATIBILITY_2_2
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295 // get the standard icon used by wxWin dialogs - this allows the user
296 // to customize the standard dialogs. The 'which' parameter is one of
297 // wxICON_XXX values
0e04ef47 298 virtual wxIcon GetStdIcon(int WXUNUSED(which)) const { return wxNullIcon; }
a69be60b 299#endif
094637f6 300
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301 // Get display mode that is used use. This is only used in framebuffer wxWin ports
302 // (such as wxMGL).
1b4908de 303 virtual wxDisplayModeInfo GetDisplayMode() const { return wxDisplayModeInfo(); }
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304 // Set display mode to use. This is only used in framebuffer wxWin ports
305 // (such as wxMGL). This method should be called from wxApp:OnInitGui
306 virtual bool SetDisplayMode(const wxDisplayModeInfo& WXUNUSED(info)) { return TRUE; }
1b4908de 307
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308 // set use of best visual flag (see below)
309 void SetUseBestVisual( bool flag ) { m_useBestVisual = flag; }
310 bool GetUseBestVisual() const { return m_useBestVisual; }
75acb532 311
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312 // set/get printing mode: see wxPRINT_XXX constants.
313 //
314 // default behaviour is the normal one for Unix: always use PostScript
315 // printing.
316 virtual void SetPrintMode(int WXUNUSED(mode)) { }
317 int GetPrintMode() const { return wxPRINT_POSTSCRIPT; }
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318
319 // called by toolkit-specific code to set the app status: active (we have
320 // focus) or not and also the last window which had focus before we were
321 // deactivated
322 virtual void SetActive(bool isActive, wxWindow *lastFocus);
e90c1d2a 323#endif // wxUSE_GUI
094637f6 324
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325 // this method allows to filter all the events processed by the program, so
326 // you should try to return quickly from it to avoid slowing down the
327 // program to the crawl
328 //
329 // return value should be -1 to continue with the normal event processing,
330 // or TRUE or FALSE to stop further processing and pretend that the event
331 // had been already processed or won't be processed at all, respectively
332 virtual int FilterEvent(wxEvent& event);
333
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334 // debugging support
335 // -----------------
336
337 // this function is called when an assert failure occurs, the base class
338 // version does the normal processing (i.e. shows the usual assert failure
339 // dialog box)
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340 //
341 // the arguments are the place where the assert occured, the text of the
342 // assert itself and the user-specified message
a5f1fd3e 343#ifdef __WXDEBUG__
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344 virtual void OnAssert(const wxChar *file,
345 int line,
346 const wxChar *cond,
347 const wxChar *msg);
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348#endif // __WXDEBUG__
349
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350 // check that the wxBuildOptions object (constructed in the application
351 // itself, usually the one from IMPLEMENT_APP() macro) matches the build
352 // options of the library and abort if it doesn't
353 static bool CheckBuildOptions(const wxBuildOptions& buildOptions);
354
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355 // deprecated functions, please updae your code to not use them!
356 // -------------------------------------------------------------
357
358#if WXWIN_COMPATIBILITY_2_2
359 // used by obsolete wxDebugMsg only
360 void SetWantDebugOutput( bool flag ) { m_wantDebugOutput = flag; }
361 bool GetWantDebugOutput() const { return m_wantDebugOutput; }
362
363 // TRUE if the application wants to get debug output
364 bool m_wantDebugOutput;
365#endif // WXWIN_COMPATIBILITY_2_2
366
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367 // implementation only from now on
368 // -------------------------------
369
370 // helpers for dynamic wxApp construction
371 static void SetInitializerFunction(wxAppInitializerFunction fn)
372 { m_appInitFn = fn; }
373 static wxAppInitializerFunction GetInitializerFunction()
374 { return m_appInitFn; }
375
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376 // process all events in the wxPendingEvents list
377 virtual void ProcessPendingEvents();
378
094637f6 379 // access to the command line arguments
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380 int argc;
381 wxChar **argv;
094637f6 382
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383protected:
384 // function used for dynamic wxApp creation
385 static wxAppInitializerFunction m_appInitFn;
386
387 // application info (must be set from the user code)
388 wxString m_vendorName, // vendor name (ACME Inc)
389 m_appName, // app name
390 m_className; // class name
a69be60b 391
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392#if wxUSE_GUI
393 // the main top level window - may be NULL
394 wxWindow *m_topWindow;
395
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396 // if Yes, exit the main loop when the last top level window is deleted, if
397 // No don't do it and if Later -- only do it once we reach our OnRun()
398 //
399 // the explanation for using this strange scheme is given in appcmn.cpp
400 enum
401 {
402 Later = -1,
403 No,
404 Yes
405 } m_exitOnFrameDelete;
1e6feb95 406
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407 // TRUE if the apps whats to use the best visual on systems where
408 // more than one are available (Sun, SGI, XFree86 4.0 ?)
409 bool m_useBestVisual;
094637f6 410
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411 // does any of our windows has focus?
412 bool m_isActive;
e90c1d2a 413#endif // wxUSE_GUI
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414};
415
416// ----------------------------------------------------------------------------
417// now include the declaration of the real class
418// ----------------------------------------------------------------------------
419
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420#if wxUSE_GUI
421 #if defined(__WXMSW__)
422 #include "wx/msw/app.h"
423 #elif defined(__WXMOTIF__)
424 #include "wx/motif/app.h"
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425 #elif defined(__WXMGL__)
426 #include "wx/mgl/app.h"
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427 #elif defined(__WXGTK__)
428 #include "wx/gtk/app.h"
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429 #elif defined(__WXX11__)
430 #include "wx/x11/app.h"
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431 #elif defined(__WXMAC__)
432 #include "wx/mac/app.h"
433 #elif defined(__WXPM__)
434 #include "wx/os2/app.h"
435 #elif defined(__WXSTUBS__)
436 #include "wx/stubs/app.h"
437 #endif
438#else // !GUI
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439 // can't use typedef because wxApp forward declared as a class
440 class WXDLLEXPORT wxApp : public wxAppBase
441 {
442 };
e90c1d2a 443#endif // GUI/!GUI
c801d85f 444
094637f6 445// ----------------------------------------------------------------------------
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446// the global data
447// ----------------------------------------------------------------------------
448
449// the one and only application object - use of wxTheApp in application code
450// is discouraged, consider using DECLARE_APP() after which you may call
451// wxGetApp() which will return the object of the correct type (i.e. MyApp and
452// not wxApp)
453WXDLLEXPORT_DATA(extern wxApp*) wxTheApp;
454
455// ----------------------------------------------------------------------------
456// global functions
457// ----------------------------------------------------------------------------
458
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459// event loop related functions only work in GUI programs
460// ------------------------------------------------------
461
ee31c392 462// Force an exit from main loop
e90c1d2a 463extern void WXDLLEXPORT wxExit();
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464
465// Yield to other apps/messages
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466extern bool WXDLLEXPORT wxYield();
467
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468// Yield to other apps/messages
469extern void WXDLLEXPORT wxWakeUpIdle();
bf9e3e73 470
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471// Post a message to the given eventhandler which will be processed during the
472// next event loop iteration
6d56eb5c 473inline void wxPostEvent(wxEvtHandler *dest, wxEvent& event)
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474{
475 wxCHECK_RET( dest, wxT("need an object to post event to in wxPostEvent") );
476
52a07708 477#if wxUSE_GUI
8e193f38 478 dest->AddPendingEvent(event);
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479#else
480 dest->ProcessEvent(event);
b568d04f 481#endif // wxUSE_GUI
52a07708 482}
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483
484// console applications may avoid using DECLARE_APP and IMPLEMENT_APP macros
485// and call these functions instead at the program startup and termination
486// -------------------------------------------------------------------------
487
b568d04f 488#if !wxUSE_GUI
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489
490// initialize the library (may be called as many times as needed, but each
491// call to wxInitialize() must be matched by wxUninitialize())
492extern bool WXDLLEXPORT wxInitialize();
493
494// clean up - the library can't be used any more after the last call to
495// wxUninitialize()
496extern void WXDLLEXPORT wxUninitialize();
497
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498// create an object of this class on stack to initialize/cleanup thel ibrary
499// automatically
500class WXDLLEXPORT wxInitializer
501{
502public:
503 // initialize the library
504 wxInitializer() { m_ok = wxInitialize(); }
505
506 // has the initialization been successful? (explicit test)
507 bool IsOk() const { return m_ok; }
508
509 // has the initialization been successful? (implicit test)
510 operator bool() const { return m_ok; }
511
512 // dtor only does clean up if we initialized the library properly
513 ~wxInitializer() { if ( m_ok ) wxUninitialize(); }
514
515private:
516 bool m_ok;
517};
518
b568d04f 519#endif // !wxUSE_GUI
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520
521// ----------------------------------------------------------------------------
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522// macros for dynamic creation of the application object
523// ----------------------------------------------------------------------------
524
525// Having a global instance of this class allows wxApp to be aware of the app
526// creator function. wxApp can then call this function to create a new app
527// object. Convoluted, but necessary.
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528
529class WXDLLEXPORT wxAppInitializer
530{
531public:
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532 wxAppInitializer(wxAppInitializerFunction fn)
533 { wxApp::SetInitializerFunction(fn); }
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534};
535
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536// Here's a macro you can use if your compiler really, really wants main() to
537// be in your main program (e.g. hello.cpp). Now IMPLEMENT_APP should add this
538// code if required.
26a87b69 539
f9a3f576 540#if !wxUSE_GUI || defined(__WXMOTIF__) || defined(__WXGTK__) || defined(__WXPM__) || defined(__WXMGL__)
094637f6 541 #define IMPLEMENT_WXWIN_MAIN \
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542 extern int wxEntry( int argc, char **argv ); \
543 int main(int argc, char **argv) { return wxEntry(argc, argv); }
d5408e98 544#elif defined(__WXMAC__) && defined(__UNIX__)
bf188f1a 545 // wxMac seems to have a specific wxEntry prototype
d5408e98 546 #define IMPLEMENT_WXWIN_MAIN \
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547 extern int wxEntry( int argc, char **argv, bool enterLoop = TRUE ); \
548 int main(int argc, char **argv) { return wxEntry(argc, argv); }
750b78ba 549#elif defined(__WXMSW__) && defined(WXUSINGDLL)
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550 // NT defines APIENTRY, 3.x not
551 #if !defined(WXAPIENTRY)
790ad94f 552 #define WXAPIENTRY WXFAR wxSTDCALL
094637f6 553 #endif
750b78ba 554
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555 #include <windows.h>
556 #include "wx/msw/winundef.h"
557
558 #define IMPLEMENT_WXWIN_MAIN \
559 extern "C" int WXAPIENTRY WinMain(HINSTANCE hInstance,\
560 HINSTANCE hPrevInstance,\
561 LPSTR m_lpCmdLine, int nCmdShow)\
562 {\
563 return wxEntry((WXHINSTANCE) hInstance,\
564 (WXHINSTANCE) hPrevInstance,\
565 m_lpCmdLine, nCmdShow);\
566 }
26a87b69 567#else
094637f6 568 #define IMPLEMENT_WXWIN_MAIN
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569#endif
570
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571#ifdef __WXUNIVERSAL__
572 #include "wx/univ/theme.h"
573
574 #define IMPLEMENT_WX_THEME_SUPPORT \
575 WX_USE_THEME(win32); \
576 WX_USE_THEME(gtk);
577#else
578 #define IMPLEMENT_WX_THEME_SUPPORT
579#endif
c801d85f 580
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581// Use this macro if you want to define your own main() or WinMain() function
582// and call wxEntry() from there.
583#define IMPLEMENT_APP_NO_MAIN(appname) \
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584 wxApp *wxCreateApp() \
585 { \
586 wxApp::CheckBuildOptions(wxBuildOptions()); \
587 return new appname; \
588 } \
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589 wxAppInitializer wxTheAppInitializer((wxAppInitializerFunction) wxCreateApp); \
590 appname& wxGetApp() { return *(appname *)wxTheApp; }
591
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592// Same as IMPLEMENT_APP() normally but doesn't include themes support in
593// wxUniversal builds
594#define IMPLEMENT_APP_NO_THEMES(appname) \
595 IMPLEMENT_APP_NO_MAIN(appname) \
596 IMPLEMENT_WXWIN_MAIN
597
598// Use this macro exactly once, the argument is the name of the wxApp-derived
599// class which is the class of your application.
600#define IMPLEMENT_APP(appname) \
601 IMPLEMENT_APP_NO_THEMES(appname) \
602 IMPLEMENT_WX_THEME_SUPPORT
603
604// this macro can be used multiple times and just allows you to use wxGetApp()
605// function
094637f6 606#define DECLARE_APP(appname) extern appname& wxGetApp();
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607
608#endif
34138703 609 // _WX_APP_H_BASE_