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4 | <HEAD> | |
5 | <TITLE>wxWindows 2 FAQ: General</TITLE> | |
6 | </HEAD> | |
7 | ||
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10 | <font face="Arial, Lucida Sans, Helvetica"> | |
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4e4dc03d | 12 | <table width=100% border=0 cellpadding=3 cellspacing=0> |
ce3ed50d | 13 | <tr> |
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14 | <td bgcolor="#004080" align=left height=24 background="images/bluetitlegradient.gif"> |
15 | <font size=+1 face="Arial, Lucida Sans, Helvetica" color="#FFFFFF"> | |
16 | <b>wxWindows 2 FAQ: General</b> | |
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17 | </font> |
18 | </td> | |
19 | </tr> | |
20 | </table> | |
21 | ||
22 | <P> | |
23 | ||
24 | See 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'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> | |
c2d48b36 | 43 | <li><a href="#dotnet">What about .NET/Mono?</a></li> |
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44 | <li><a href="#help">How can I help the project?</a></li> |
45 | </ul> | |
46 | <hr> | |
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47 | |
48 | <H3><a name="whatis">What is wxWindows?</a></H3> | |
49 | ||
50 | wxWindows is a class library that allows you to compile graphical C++ programs on a range of | |
51 | different platforms. wxWindows defines a common API across platforms, but uses the native graphical user interface (GUI) on each platform, | |
8b283bb8 | 52 | so your program will take on the native 'look and feel' that users are familiar with.<P> |
ce3ed50d | 53 | |
eb269381 | 54 | Although GUI applications are mostly built programmatically, there are several dialog editors to help |
8b283bb8 | 55 | build attractive dialogs and panels. Robert Roebling's <a href="http://www.roebling.com">wxDesigner</a> |
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56 | and Anthemion Software's <a href="http://www.anthemion.co.uk/dialogblocks/" target=_new>DialogBlocks</a> |
57 | are two commercial examples, but there are others: see the <a href="lnk_tools.htm">Useful Tools</a> page.<P> | |
ce3ed50d | 58 | |
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59 | You don't have to use C++ to use wxWindows: there is a <a href="http://wxpython.org">Python interface</a> for wxWindows 2, |
60 | and also a <a href="http://wxperl.sourceforge.net" target=_top>Perl interface</a>. | |
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61 | <P> |
62 | ||
2b5f62a0 | 63 | <h3><a name="licence">Can I use wxWindows 2 for both proprietary (commercial) projects, and GPL'ed projects?</a></h3> |
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64 | |
65 | Yes. Please see the <a href="newlicen.htm">licence</a> for details, but basically | |
66 | you can distribute proprietary binaries without distributing any source code, and neither will wxWindows | |
67 | conflict with GPL code you may be using or developing with it. | |
68 | <P> | |
69 | The conditions for using wxWindows 2 are the same whether you are a personal, academic | |
70 | or commercial developer. | |
71 | <P> | |
72 | ||
2b5f62a0 | 73 | <h3><a name="support">Is there support?</a></h3> |
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74 | |
75 | No official support, but the mailing list is very helpful and some people say that | |
76 | wxWindows support is better than for much commercial software. The developers are | |
77 | keen to fix bugs as soon as possible, though obviously there are no guarantees. | |
78 | <P> | |
79 | ||
80 | <H3><a name="users">Who uses wxWindows?</a></H3> | |
81 | ||
82 | Many organisations - commercial, government, and academic - across the | |
8b283bb8 | 83 | world. It's impossible to estimate the true number of users, since |
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84 | wxWindows is obtained by many different means, and we cannot monitor |
85 | distribution. The mailing list contains around 300-400 entries which is | |
86 | quite large for a list of this type.<P> | |
87 | ||
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88 | See <a href="users.htm">Users</a> for a list of some users and their applications, and |
89 | also <A href="feedback.htm">Feedback</a> for comments.<P> | |
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90 | Our highest-profile user yet is industry veteran and Lotus Corp. founder Mitch Kapor |
91 | and his <a href="http://www.osafoundation.org" target=_new>Open Source Applications Foundation</a>. | |
92 | <P> | |
b953bdc2 | 93 | |
8b283bb8 | 94 | <H3><a name="platforms">What platforms are supported by wxWindows 2?</a></H3> |
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95 | |
96 | <ul> | |
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97 | <li>Windows 3.1, Windows 95/98, Windows NT, Windows 2000, Windows ME. |
98 | <li>Linux and other Unix platforms with GTK+. | |
99 | <li>Unix with Motif or the free Motif clone Lesstif. | |
100 | <li>Mac OS. | |
101 | <li>Embedded platforms are being investigated. See the <a href="wxuniv.htm">wxUniversal</a> project. | |
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102 | <li>An OS/2 port is in progress, and you can also compile wxWindows for GTK+ or Motif |
103 | on OS/2. | |
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104 | </ul> |
105 | <P> | |
106 | ||
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107 | <H3><a name="specific">How does wxWindows 2 support platform-specific |
108 | features?</a></H3> | |
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109 | |
110 | This is a hotly-debated topic amongst the developers. My own philosophy | |
111 | is to make wxWindows as platform-independent as possible, but allow in a | |
112 | few classes (functions, window styles) that are platform-specific. | |
113 | For example, Windows metafiles and Windows 95 taskbar icons have | |
114 | their own classes on Windows, but nowhere else. Because these classes | |
8b283bb8 | 115 | are provided and are wxWindows-compatible, it doesn't take much |
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116 | coding effort for an application programmer to add support for |
117 | some functionality that the user on a particular platform might otherwise | |
118 | miss. Also, some classes that started off as platform-specific, such | |
119 | as the MDI classes, have been emulated on other platforms. I can imagine | |
120 | that even wxTaskBarIcon may be implemented for Unix desktops one day. | |
121 | <P> | |
122 | ||
8b283bb8 | 123 | In other words, wxWindows is not a 'lowest common denominator' approach, |
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124 | but it will still be possible to write portable programs using the |
125 | core API. Forbidding some platform-specific classes would be a stupid | |
126 | approach that would alienate many potential users, and encourage | |
127 | the perception that toolkits such as wxWindows are not up to the demands | |
8b283bb8 | 128 | of today's sophisticated applications.<P> |
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129 | |
130 | Currently resources such as bitmaps and icons are handled in a platform-specific | |
131 | way, but it is hoped to reduce this dependence in due course.<P> | |
132 | ||
8b283bb8 | 133 | Another reason why wxWindows 2 is not a 'lowest common denominator' toolkit is that |
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134 | some functionality missing on some platform has been provided using generic, |
135 | platform-independent code, such as the wxTreeCtrl and wxListCtrl classes.<P> | |
136 | ||
8b283bb8 | 137 | <H3><a name="stl">Does wxWindows use STL? or the standard string class?</a></H3> |
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138 | |
139 | No. This is a much-discussed topic that has (many times) ended with the conclusion that it is in | |
8b283bb8 | 140 | wxWindows' best interests to avoid use of templates. Not all compilers can handle |
b953bdc2 | 141 | templates adequately so it would dramatically reduce the number of compilers |
cd508246 | 142 | and platforms that could be supported. It would also be undersirable to make |
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143 | wxWindows dependent on another large library that may have to be downloaded and installed. |
144 | In addition, use of templates can lead to executable bloat, which is something | |
cd508246 | 145 | wxWindows 2 is strenously trying to avoid.<P> |
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146 | |
147 | The standard C++ string class is not used, again because it is not available to all compilers, | |
148 | and it is not necessarily a very efficient implementation. Also, we retain more flexibility | |
149 | by being able to modify our own string class. Some compatibility with the string class | |
150 | has been built into wxString.<P> | |
151 | ||
152 | There is nothing to stop an application using templates or the string class for its own | |
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153 | purposes. With wxWindows debugging options on, you may find you get errors when including |
154 | STL headers. You can work around it either by switching off memory checking, | |
155 | or by adding this to a header before you include any STL files:<P> | |
156 | ||
157 | <PRE> | |
158 | #ifdef new | |
159 | #undef new | |
160 | #endif | |
161 | </PRE> | |
162 | ||
163 | <P> | |
164 | ||
b953bdc2 | 165 | |
8b283bb8 | 166 | <H3><a name="richedit">Is there a rich edit/markup widget for wxWindows 2?</a></H3> |
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167 | |
168 | These are the possibilities so far:<P> | |
169 | ||
170 | <ul> | |
790ad94f | 171 | <li>See <a href="http://www.scintilla.org" target=_top>www.scintilla.org</a> for |
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172 | a very nice syntax-highlighting editor widget. Robin Dunn has written a wxWindows wrapper |
173 | for this widget, available in the wxWindows distribution under contrib/src/stc. | |
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174 | <li>If you only need to display marked-up information, rather than edit it, |
175 | then wxHTML will suit your needs. wxHTML is built into wxWindows - please see the reference | |
176 | manual for details, and samples/html. | |
177 | <li>There are rich edit widgets in both WIN32 and GTK+, but there is currently | |
8b283bb8 | 178 | no wxWindows wrapper for these (but text attribute functions are being added in the wxWindows 2.3.x series). |
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179 | </ul> |
180 | ||
181 | <P> | |
182 | ||
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183 | <h3><a name="exceptions">How to use C++ exceptions with wxWindows?</a></h3> |
184 | ||
185 | wxWindows library itself is unfortunately <i>not</i> exception-safe (as its | |
186 | initial version predates, by far, the addition of the exceptions to the C++ | |
187 | language). However you can still use the exceptions in your own code and use | |
188 | the other libraries using the exceptions for the error reporting together with | |
189 | wxWindows. | |
190 | ||
191 | <p> | |
192 | There are a few issues to keep in mind, though: | |
193 | <ul> | |
194 | <li>You shouldn't let the exceptions propagate through wxWindows code, | |
195 | in particular you should always catch the exceptions thrown by the | |
196 | functions called from an event handler in the handler itself and not | |
197 | let them propagate upwards to wxWindows. | |
198 | ||
199 | <li>You may need to ensure that the compiler support for the exceptions is | |
200 | enabled as, considering that wxWindows itself doesn't use the | |
201 | exceptions and turning their support on results in the library size | |
202 | augmentation of 10% to 20%, it is turned off by default for a few | |
203 | compilers. Moreover, for gcc (or at least its mingw version) you must | |
204 | also turn on the RTTI support to be able to use the exceptions, so you | |
205 | should use <tt>--disable-no_rtti --disable-no_exceptions</tt> options | |
206 | when configuring the library (attention to the double negation). | |
207 | </ul> | |
208 | ||
209 | <p> | |
210 | ||
2b5f62a0 | 211 | <H3><a name="dev">How is wxWindows being developed?</a></H3> |
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212 | |
213 | We are using the <a href="cvs.htm">CVS</a> system to develop and maintain wxWindows. This allows | |
2b5f62a0 | 214 | us to make alterations and upload them instantly to the server, from |
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215 | which others can update their source.<P> |
216 | ||
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217 | To build source from CVS, see the file BuildCVS.txt in the top-level wxWindows distribution |
218 | directory.<P> | |
219 | ||
2b5f62a0 | 220 | <H3><a name="distrib">How is wxWindows distributed?</a></H3> |
b953bdc2 | 221 | |
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222 | By ftp, and via the <a href="cdrom2.htm">wxWindows CD-ROM</a>. |
223 | <P> | |
224 | If you are feeling adventurous, you may also check out the sources directly | |
2b5f62a0 | 225 | from <a href="cvs.htm">cvs</a>. |
8b283bb8 | 226 | <p> |
b953bdc2 | 227 | |
8b283bb8 | 228 | <H3><a name="future">What are the plans for the future?</a></H3> |
b953bdc2 | 229 | |
2b5f62a0 | 230 | Currently we're working too hard on getting wxWindows finished (are GUI toolkits ever |
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231 | finished?) to think very far ahead. However, we know we want to make wxWindows as robust |
232 | and well-publicised as possible. We also want to aim for better platform-independence of | |
2b5f62a0 | 233 | resources such as icons and bitmaps, standardising on PNG and XPM for all platforms.<P> |
b953bdc2 | 234 | |
91c93c99 | 235 | Other possibilities include: DCOM/CORBA compatibility; a wxWindows book; |
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236 | <a href="http://wxworkshop.sourceforge.net/">wxWorkshop</a>, an IDE; |
237 | other platforms, especially embedded systems; other interface abilities such as speech output.<P> | |
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238 | |
239 | We will investigate the possibility of compiler or operating system vendors bundling wxWindows with | |
240 | their product.<P> | |
241 | ||
242 | The high-level goal of wxWindows is to be thought of as the number one C++ framework, | |
243 | for virtually any platform. Move over, MFC!<P> | |
244 | ||
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245 | <h3><a name="base">What is wxBase?</a></h3> |
246 | ||
247 | wxBase is a subset of wxWindows comprised by the non-GUI classes. It includes | |
248 | wxWindows container and primitive data type classes (including wxString, | |
249 | wxDateTime and so on) and also useful wrappers for the operating system objects | |
250 | such as files, processes, threads, sockets and so on. With very minor | |
251 | exceptions wxBase may be used in exactly the same way as wxWindows but it | |
252 | doesn't require a GUI to run and so is ideal for creating console mode | |
253 | utilities or server programs. It is also possible to create a program which can | |
254 | be compiled either as a console application (using wxBase) or a GUI one (using | |
255 | a full featured wxWindows port). | |
256 | ||
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257 | <H3><a name="univ">What is wxUniversal?</a></H3> |
258 | ||
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259 | The main difference between wxUniversal-based ports (such as wxX11, wxMGL) and other ports (such as wxMSW, wxGTK+, wxMac) |
260 | is that wxUniversal implements all controls (or widgets) in | |
261 | wxWindows itself thus allowing to have much more flexibility (for example, support for | |
262 | themes even under MS Windows). It also means that it is now much easier to | |
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263 | port wxWindows to a new platform as only the low-level classes must be ported |
264 | which make for a small part of the library. | |
265 | <p> | |
266 | You may find more about wxUniversal <a href=wxuniv.htm>here</a>. | |
267 | ||
268 | <H3><a name="jave">What about Java?</a></H3> | |
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269 | |
270 | The Java honeymoon period is over :-) and people are realising that it cannot | |
8b283bb8 | 271 | meet all their cross-platform development needs. We don't anticipate a major threat |
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272 | from Java, and the level of interest in wxWindows is as high as ever.<P> |
273 | ||
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274 | <H3><a name="dotnet">What about .NET/Mono?</a></H3> |
275 | ||
276 | Microsoft is spending a lot on promoting the .NET initiative, which | |
277 | is a set of languages, APIs and web service components for Windows. | |
278 | Ximian has started an open source version of .NET, mostly for Linux. | |
279 | C# is Microsoft's alternative to Java, supporting 'managed code', | |
280 | garbage collection and various other Java-like language features.<P> | |
281 | ||
282 | Although this may be attractive to some developers, there | |
283 | is a variety of reasons why the .NET/Mono combination is unlikely | |
284 | to make wxWindows redundant. Please note that the following comments | |
285 | are Julian Smart's opinions.<P> | |
286 | ||
287 | <ol> | |
288 | <li>Not everyone wants or needs net services. | |
289 | <li>C++ will be used for a long time to come; compared with C++, C# is a recent development and its future is not certain. | |
290 | <li>Mono Forms may only target Winelib (at least to begin with), so the end result is not as native as | |
291 | wxWindows (I'm aware there is GTK# for use with the C# language). | |
292 | <li>C# is usually byte-compiled and therefore slower. Plus, .NET adds a layer of overhead to the client computer | |
293 | that wxWindows does not require. | |
294 | <li>Mono hasn't proven its long-term viability yet (it's a complex system of components); wxWindows is ready now. | |
295 | <li>You may not wish to buy into Microsoft marketing spin and APIs. | |
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296 | <li>Microsoft may at some point sue developers of non-Microsoft .NET implementations. After all, |
297 | platform-independence is not in Microsoft's interest. | |
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298 | <li>.NET might never be implemented on some platforms, especially Mac and embedded variants of Linux. |
299 | <li>wxPython and other language variants provide further reasons for wxWindows to continue. | |
300 | <li>The same issue exists for Qt: if Qt sales remain strong, it's a good indication that | |
301 | the market for a C++-based approach is still there. (Either that, or everyone's turning to wxWindows!) | |
302 | </ol> | |
303 | ||
304 | There is nothing to stop folk from developing a C# version of the wxWindows API; | |
305 | we already have bindings to Python, Perl, JavaScript, Lua, Basic, and Eiffel. | |
306 | Update: a <a href="http://wxnet.sourceforge.net/" target=_new>wx.NET</a> project is now in progress. | |
307 | ||
308 | <P> | |
309 | ||
8b283bb8 | 310 | <H3><a name="help">How can I help the project?</a></H3> |
b953bdc2 | 311 | |
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312 | Please check out the <a href="http://www.wxwindows.org/develop2.htm">Community</a> pages, |
313 | in particular the <a href="projects.htm">suggested projects</a>, and | |
2b5f62a0 | 314 | mail the developers' mailing list with your own suggestions.<P> |
b953bdc2 | 315 | |
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316 | </font> |
317 | ||
318 | </BODY> | |
319 | ||
320 | </HTML> |