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[wxWidgets.git] / include / wx / init.h
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: wx/init.h
3 // Purpose: wxWidgets initialization and finalization functions
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 29.06.2003
7 // RCS-ID: $Id$
8 // Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
9 // Licence: wxWindows licence
10 ///////////////////////////////////////////////////////////////////////////////
11
12 #ifndef _WX_INIT_H_
13 #define _WX_INIT_H_
14
15 #include "wx/defs.h"
16 #include "wx/chartype.h"
17
18 // ----------------------------------------------------------------------------
19 // wxEntry helper functions which allow to have more fine grained control
20 // ----------------------------------------------------------------------------
21
22 // do common initialization, return true if ok (in this case wxEntryCleanup
23 // must be called later), otherwise the program can't use wxWidgets at all
24 //
25 // this function also creates wxTheApp as a side effect, if IMPLEMENT_APP
26 // hadn't been used a dummy default application object is created
27 //
28 // note that the parameters may be modified, this is why we pass them by
29 // reference!
30 extern bool WXDLLIMPEXP_BASE wxEntryStart(int& argc, wxChar **argv);
31
32 // free the resources allocated by the library in wxEntryStart() and shut it
33 // down (wxEntryStart() may be called again afterwards if necessary)
34 extern void WXDLLIMPEXP_BASE wxEntryCleanup();
35
36
37 // ----------------------------------------------------------------------------
38 // wxEntry: this function initializes the library, runs the main event loop
39 // and cleans it up
40 // ----------------------------------------------------------------------------
41
42 // note that other, platform-specific, overloads of wxEntry may exist as well
43 // but this one always exists under all platforms
44 //
45 // returns the program exit code
46 extern int WXDLLIMPEXP_BASE wxEntry(int& argc, wxChar **argv);
47
48 // we overload wxEntry[Start]() to take "char **" pointers too
49 #if wxUSE_UNICODE
50
51 extern bool WXDLLIMPEXP_BASE wxEntryStart(int& argc, char **argv);
52 extern int WXDLLIMPEXP_BASE wxEntry(int& argc, char **argv);
53
54 #endif// wxUSE_UNICODE
55
56 // ----------------------------------------------------------------------------
57 // Using the library without (explicit) application object: you may avoid using
58 // wxDECLARE_APP and wxIMPLEMENT_APP macros and call the functions below instead at
59 // the program startup and termination
60 // ----------------------------------------------------------------------------
61
62 // initialize the library (may be called as many times as needed, but each
63 // call to wxInitialize() must be matched by wxUninitialize())
64 extern bool WXDLLIMPEXP_BASE wxInitialize();
65 extern bool WXDLLIMPEXP_BASE wxInitialize(int argc, wxChar **argv);
66 #if wxUSE_UNICODE
67 extern bool WXDLLIMPEXP_BASE wxInitialize(int argc, char **argv);
68 #endif
69
70 // clean up -- the library can't be used any more after the last call to
71 // wxUninitialize()
72 extern void WXDLLIMPEXP_BASE wxUninitialize();
73
74 // create an object of this class on stack to initialize/cleanup the library
75 // automatically
76 class WXDLLIMPEXP_BASE wxInitializer
77 {
78 public:
79 // initialize the library
80 wxInitializer()
81 {
82 m_ok = wxInitialize();
83 }
84
85 wxInitializer(int argc, wxChar **argv)
86 {
87 m_ok = wxInitialize(argc, argv);
88 }
89
90 #if wxUSE_UNICODE
91 wxInitializer(int argc, char **argv)
92 {
93 m_ok = wxInitialize(argc, argv);
94 }
95 #endif // wxUSE_UNICODE
96
97 // has the initialization been successful? (explicit test)
98 bool IsOk() const { return m_ok; }
99
100 // has the initialization been successful? (implicit test)
101 operator bool() const { return m_ok; }
102
103 // dtor only does clean up if we initialized the library properly
104 ~wxInitializer() { if ( m_ok ) wxUninitialize(); }
105
106 private:
107 bool m_ok;
108 };
109
110 #endif // _WX_INIT_H_
111