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5<TITLE>wxWindows 2 FAQ: General</TITLE>
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16<b>wxWindows 2 FAQ: General</b>
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22<P>
23
24See also <a href="faq.htm">top-level FAQ page</a>.
25<hr>
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26<h3>List of questions in this category</h3>
27<ul>
28<li><a href="#whatis">What is wxWindows?</a></li>
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29<li><a href="#licence">Can I use wxWindows 2 for both proprietary projects, and GPL&#39;ed projects?</a></li>
30<li><a href="#support">Is there support?</a></li>
8b283bb8 31<li><a href="#users">Who uses wxWindows?</a></li>
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32<li><a href="#platforms">What platforms are supported by wxWindows?</a></li>
33<li><a href="#specific">How does wxWindows support platform-specific features?</a></li>
8b283bb8 34<li><a href="#stl">Does wxWindows use STL? or the standard string class?</a></li>
2b5f62a0 35<li><a href="#richedit">Is there a rich edit/markup widget for wxWindows?</a></ li>
53e112a0 36<li><a href="#exceptions">How to use C++ exceptions with wxWindows?</a></ li>
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37<li><a href="#dev">How is wxWindows being developed?</a></li>
38<li><a href="#distrib">How is wxWindows distributed?</a></li>
8b283bb8 39<li><a href="#future">What are the plans for the future?</a></li>
2b5f62a0 40<li><a href="#base">What is wxBase?</a></li>
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41<li><a href="#univ">What is wxUniversal?</a></li>
42<li><a href="#jave">What about Java?</a></li>
43<li><a href="#help">How can I help the project?</a></li>
44</ul>
45<hr>
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46
47<H3><a name="whatis">What is wxWindows?</a></H3>
48
49wxWindows is a class library that allows you to compile graphical C++ programs on a range of
50different platforms. wxWindows defines a common API across platforms, but uses the native graphical user interface (GUI) on each platform,
8b283bb8 51so your program will take on the native &#39;look and feel&#39; that users are familiar with.<P>
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52
53Although GUI applications are mostly built programmatically, there is a dialog editor to help
8b283bb8 54build attractive dialogs and panels. Robert Roebling&#39;s <a href="http://www.roebling.com">wxDesigner</a>
51ab9400 55makes light work of resizable, portable dialogs.<P>
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57You don&#39;t have to use C++ to use wxWindows: there is a <a href="http://wxpython.org">Python interface</a> for wxWindows 2,
58and also a <a href="http://wxperl.sourceforge.net" target=_top>Perl interface</a>.
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59<P>
60
2b5f62a0 61<h3><a name="licence">Can I use wxWindows 2 for both proprietary (commercial) projects, and GPL&#39;ed projects?</a></h3>
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62
63Yes. Please see the <a href="newlicen.htm">licence</a> for details, but basically
64you can distribute proprietary binaries without distributing any source code, and neither will wxWindows
65conflict with GPL code you may be using or developing with it.
66<P>
67The conditions for using wxWindows 2 are the same whether you are a personal, academic
68or commercial developer.
69<P>
70
2b5f62a0 71<h3><a name="support">Is there support?</a></h3>
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72
73No official support, but the mailing list is very helpful and some people say that
74wxWindows support is better than for much commercial software. The developers are
75keen to fix bugs as soon as possible, though obviously there are no guarantees.
76<P>
77
78<H3><a name="users">Who uses wxWindows?</a></H3>
79
80Many organisations - commercial, government, and academic - across the
8b283bb8 81world. It&#39;s impossible to estimate the true number of users, since
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82wxWindows is obtained by many different means, and we cannot monitor
83distribution. The mailing list contains around 300-400 entries which is
84quite large for a list of this type.<P>
85
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86See <a href="users.htm">Users</a> for a list of some users and their applications, and
87also <A href="feedback.htm">Feedback</a> for comments.<P>
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88Our highest-profile user yet is industry veteran and Lotus Corp. founder Mitch Kapor
89and his <a href="http://www.osafoundation.org" target=_new>Open Source Applications Foundation</a>.
90<P>
b953bdc2 91
8b283bb8 92<H3><a name="platforms">What platforms are supported by wxWindows 2?</a></H3>
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93
94<ul>
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95<li>Windows 3.1, Windows 95/98, Windows NT, Windows 2000, Windows ME.
96<li>Linux and other Unix platforms with GTK+.
97<li>Unix with Motif or the free Motif clone Lesstif.
98<li>Mac OS.
99<li>Embedded platforms are being investigated. See the <a href="wxuniv.htm">wxUniversal</a> project.
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100<li>An OS/2 port is in progress, and you can also compile wxWindows for GTK+ or Motif
101on OS/2.
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102</ul>
103<P>
104
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105<H3><a name="specific">How does wxWindows 2 support platform-specific
106features?</a></H3>
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107
108This is a hotly-debated topic amongst the developers. My own philosophy
109is to make wxWindows as platform-independent as possible, but allow in a
110few classes (functions, window styles) that are platform-specific.
111For example, Windows metafiles and Windows 95 taskbar icons have
112their own classes on Windows, but nowhere else. Because these classes
8b283bb8 113are provided and are wxWindows-compatible, it doesn&#39;t take much
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114coding effort for an application programmer to add support for
115some functionality that the user on a particular platform might otherwise
116miss. Also, some classes that started off as platform-specific, such
117as the MDI classes, have been emulated on other platforms. I can imagine
118that even wxTaskBarIcon may be implemented for Unix desktops one day.
119<P>
120
8b283bb8 121In other words, wxWindows is not a &#39;lowest common denominator&#39; approach,
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122but it will still be possible to write portable programs using the
123core API. Forbidding some platform-specific classes would be a stupid
124approach that would alienate many potential users, and encourage
125the perception that toolkits such as wxWindows are not up to the demands
8b283bb8 126of today&#39;s sophisticated applications.<P>
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127
128Currently resources such as bitmaps and icons are handled in a platform-specific
129way, but it is hoped to reduce this dependence in due course.<P>
130
8b283bb8 131Another reason why wxWindows 2 is not a &#39;lowest common denominator&#39; toolkit is that
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132some functionality missing on some platform has been provided using generic,
133platform-independent code, such as the wxTreeCtrl and wxListCtrl classes.<P>
134
8b283bb8 135<H3><a name="stl">Does wxWindows use STL? or the standard string class?</a></H3>
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136
137No. This is a much-discussed topic that has (many times) ended with the conclusion that it is in
8b283bb8 138wxWindows&#39; best interests to avoid use of templates. Not all compilers can handle
b953bdc2 139templates adequately so it would dramatically reduce the number of compilers
cd508246 140and platforms that could be supported. It would also be undersirable to make
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141wxWindows dependent on another large library that may have to be downloaded and installed.
142In addition, use of templates can lead to executable bloat, which is something
cd508246 143wxWindows 2 is strenously trying to avoid.<P>
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144
145The standard C++ string class is not used, again because it is not available to all compilers,
146and it is not necessarily a very efficient implementation. Also, we retain more flexibility
147by being able to modify our own string class. Some compatibility with the string class
148has been built into wxString.<P>
149
150There is nothing to stop an application using templates or the string class for its own
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151purposes. With wxWindows debugging options on, you may find you get errors when including
152STL headers. You can work around it either by switching off memory checking,
153or by adding this to a header before you include any STL files:<P>
154
155<PRE>
156&#35;ifdef new
157&#35;undef new
158&#35;endif
159</PRE>
160
161<P>
162
b953bdc2 163
8b283bb8 164<H3><a name="richedit">Is there a rich edit/markup widget for wxWindows 2?</a></H3>
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165
166These are the possibilities so far:<P>
167
168<ul>
790ad94f 169<li>See <a href="http://www.scintilla.org" target=_top>www.scintilla.org</a> for
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170a very nice syntax-highlighting editor widget. Robin Dunn has written a wxWindows wrapper
171for this widget, available in the wxWindows distribution under contrib/src/stc.
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172<li>If you only need to display marked-up information, rather than edit it,
173then wxHTML will suit your needs. wxHTML is built into wxWindows - please see the reference
174manual for details, and samples/html.
175<li>There are rich edit widgets in both WIN32 and GTK+, but there is currently
8b283bb8 176no wxWindows wrapper for these (but text attribute functions are being added in the wxWindows 2.3.x series).
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177</ul>
178
179<P>
180
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181<h3><a name="exceptions">How to use C++ exceptions with wxWindows?</a></h3>
182
183wxWindows library itself is unfortunately <i>not</i> exception-safe (as its
184initial version predates, by far, the addition of the exceptions to the C++
185language). However you can still use the exceptions in your own code and use
186the other libraries using the exceptions for the error reporting together with
187wxWindows.
188
189<p>
190There are a few issues to keep in mind, though:
191<ul>
192 <li>You shouldn&#39;t let the exceptions propagate through wxWindows code,
193 in particular you should always catch the exceptions thrown by the
194 functions called from an event handler in the handler itself and not
195 let them propagate upwards to wxWindows.
196
197 <li>You may need to ensure that the compiler support for the exceptions is
198 enabled as, considering that wxWindows itself doesn&#39;t use the
199 exceptions and turning their support on results in the library size
200 augmentation of 10% to 20%, it is turned off by default for a few
201 compilers. Moreover, for gcc (or at least its mingw version) you must
202 also turn on the RTTI support to be able to use the exceptions, so you
203 should use <tt>--disable-no_rtti --disable-no_exceptions</tt> options
204 when configuring the library (attention to the double negation).
205</ul>
206
207<p>
208
2b5f62a0 209<H3><a name="dev">How is wxWindows being developed?</a></H3>
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210
211We are using the <a href="cvs.htm">CVS</a> system to develop and maintain wxWindows. This allows
2b5f62a0 212us to make alterations and upload them instantly to the server, from
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213which others can update their source.<P>
214
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215To build source from CVS, see the file BuildCVS.txt in the top-level wxWindows distribution
216directory.<P>
217
2b5f62a0 218<H3><a name="distrib">How is wxWindows distributed?</a></H3>
b953bdc2 219
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220By ftp, and via the <a href="cdrom2.htm">wxWindows CD-ROM</a>.
221<P>
222If you are feeling adventurous, you may also check out the sources directly
2b5f62a0 223from <a href="cvs.htm">cvs</a>.
8b283bb8 224<p>
b953bdc2 225
8b283bb8 226<H3><a name="future">What are the plans for the future?</a></H3>
b953bdc2 227
2b5f62a0 228Currently we&#39;re working too hard on getting wxWindows finished (are GUI toolkits ever
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229finished?) to think very far ahead. However, we know we want to make wxWindows as robust
230and well-publicised as possible. We also want to aim for better platform-independence of
2b5f62a0 231resources such as icons and bitmaps, standardising on PNG and XPM for all platforms.<P>
b953bdc2 232
91c93c99 233Other possibilities include: DCOM/CORBA compatibility; a wxWindows book;
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234<a href="http://wxworkshop.sourceforge.net/">wxWorkshop</a>, an IDE;
235other platforms, especially embedded systems; other interface abilities such as speech output.<P>
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236
237We will investigate the possibility of compiler or operating system vendors bundling wxWindows with
238their product.<P>
239
240The high-level goal of wxWindows is to be thought of as the number one C++ framework,
241for virtually any platform. Move over, MFC!<P>
242
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243<h3><a name="base">What is wxBase?</a></h3>
244
245wxBase is a subset of wxWindows comprised by the non-GUI classes. It includes
246wxWindows container and primitive data type classes (including wxString,
247wxDateTime and so on) and also useful wrappers for the operating system objects
248such as files, processes, threads, sockets and so on. With very minor
249exceptions wxBase may be used in exactly the same way as wxWindows but it
250doesn&#39;t require a GUI to run and so is ideal for creating console mode
251utilities or server programs. It is also possible to create a program which can
252be compiled either as a console application (using wxBase) or a GUI one (using
253a full featured wxWindows port).
254
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255<H3><a name="univ">What is wxUniversal?</a></H3>
256
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257The main difference between wxUniversal-based ports (such as wxX11, wxMGL) and other ports (such as wxMSW, wxGTK+, wxMac)
258is that wxUniversal implements all controls (or widgets) in
259wxWindows itself thus allowing to have much more flexibility (for example, support for
260themes even under MS Windows). It also means that it is now much easier to
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261port wxWindows to a new platform as only the low-level classes must be ported
262which make for a small part of the library.
263<p>
264You may find more about wxUniversal <a href=wxuniv.htm>here</a>.
265
266<H3><a name="jave">What about Java?</a></H3>
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267
268The Java honeymoon period is over :-) and people are realising that it cannot
8b283bb8 269meet all their cross-platform development needs. We don&#39;t anticipate a major threat
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270from Java, and the level of interest in wxWindows is as high as ever.<P>
271
8b283bb8 272<H3><a name="help">How can I help the project?</a></H3>
b953bdc2 273
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274Please check out the <a href="http://www.wxwindows.org/develop2.htm">Community</a> pages,
275in particular the <a href="projects.htm">suggested projects</a>, and
2b5f62a0 276mail the developers&#39; mailing list with your own suggestions.<P>
b953bdc2 277
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