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1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // Name: font.h | |
3 | // Purpose: documentation for wxFont class | |
4 | // Author: wxWidgets team | |
5 | // RCS-ID: $Id$ | |
6 | // Licence: wxWindows license | |
7 | ///////////////////////////////////////////////////////////////////////////// | |
8 | ||
9 | /** | |
10 | @class wxFont | |
11 | @wxheader{font.h} | |
12 | ||
13 | A font is an object which determines the appearance of text. Fonts are | |
14 | used for drawing text to a device context, and setting the appearance of | |
15 | a window's text. | |
16 | ||
17 | This class uses @ref overview_trefcount "reference counting and copy-on-write" | |
18 | internally so that assignments between two instances of this class are very | |
19 | cheap. You can therefore use actual objects instead of pointers without | |
20 | efficiency problems. If an instance of this class is changed it will create | |
21 | its own data internally so that other instances, which previously shared the | |
22 | data using the reference counting, are not affected. | |
23 | ||
24 | You can retrieve the current system font settings with wxSystemSettings. | |
25 | ||
26 | wxSystemSettings | |
27 | ||
28 | @library{wxcore} | |
29 | @category{gdi} | |
30 | ||
31 | @stdobjects | |
32 | Objects: | |
33 | wxNullFont | |
34 | Pointers: | |
35 | wxNORMAL_FONT | |
36 | ||
37 | wxSMALL_FONT | |
38 | ||
39 | wxITALIC_FONT | |
40 | ||
41 | wxSWISS_FONT | |
42 | ||
43 | @seealso | |
44 | @ref overview_wxfontoverview "wxFont overview", wxDC::SetFont, wxDC::DrawText, | |
45 | wxDC::GetTextExtent, wxFontDialog, wxSystemSettings | |
46 | */ | |
47 | class wxFont : public wxGDIObject | |
48 | { | |
49 | public: | |
50 | //@{ | |
51 | /** | |
52 | Creates a font object with the specified attributes. | |
53 | ||
54 | @param pointSize | |
55 | Size in points. | |
56 | ||
57 | @param pixelSize | |
58 | Size in pixels: this is directly supported only under MSW | |
59 | currently where this constructor can be used directly, under other platforms a | |
60 | font with the closest size to the given one is found using binary search and | |
61 | the static New method must be used. | |
62 | ||
63 | @param family | |
64 | Font family, a generic way of referring to fonts without specifying actual | |
65 | facename. One of: | |
66 | ||
67 | ||
68 | wxFONTFAMILY_DEFAULT | |
69 | ||
70 | ||
71 | Chooses a default font. | |
72 | ||
73 | wxFONTFAMILY_DECORATIVE | |
74 | ||
75 | ||
76 | A decorative font. | |
77 | ||
78 | wxFONTFAMILY_ROMAN | |
79 | ||
80 | ||
81 | A formal, serif font. | |
82 | ||
83 | wxFONTFAMILY_SCRIPT | |
84 | ||
85 | ||
86 | A handwriting font. | |
87 | ||
88 | wxFONTFAMILY_SWISS | |
89 | ||
90 | ||
91 | A sans-serif font. | |
92 | ||
93 | wxFONTFAMILY_MODERN | |
94 | ||
95 | ||
96 | A fixed pitch font. | |
97 | ||
98 | wxFONTFAMILY_TELETYPE | |
99 | ||
100 | ||
101 | A teletype font. | |
102 | ||
103 | @param style | |
104 | One of wxFONTSTYLE_NORMAL, wxFONTSTYLE_SLANT and wxFONTSTYLE_ITALIC. | |
105 | ||
106 | @param weight | |
107 | Font weight, sometimes also referred to as font boldness. One of: | |
108 | ||
109 | ||
110 | wxFONTWEIGHT_NORMAL | |
111 | ||
112 | ||
113 | Normal font. | |
114 | ||
115 | wxFONTWEIGHT_LIGHT | |
116 | ||
117 | ||
118 | Light font. | |
119 | ||
120 | wxFONTWEIGHT_BOLD | |
121 | ||
122 | ||
123 | Bold font. | |
124 | ||
125 | @param underline | |
126 | The value can be @true or @false. At present this has an effect on Windows and | |
127 | Motif 2.x only. | |
128 | ||
129 | @param faceName | |
130 | An optional string specifying the actual typeface to be used. If it is an empty | |
131 | string, | |
132 | a default typeface will be chosen based on the family. | |
133 | ||
134 | @param encoding | |
135 | An encoding which may be one of | |
136 | ||
137 | wxFONTENCODING_SYSTEM | |
138 | ||
139 | ||
140 | Default system encoding. | |
141 | ||
142 | wxFONTENCODING_DEFAULT | |
143 | ||
144 | ||
145 | Default application encoding: this | |
146 | is the encoding set by calls to | |
147 | SetDefaultEncoding and which may be set to, | |
148 | say, KOI8 to create all fonts by default with KOI8 encoding. Initially, the | |
149 | default application encoding is the same as default system encoding. | |
150 | ||
151 | wxFONTENCODING_ISO8859_1...15 | |
152 | ||
153 | ||
154 | ISO8859 encodings. | |
155 | ||
156 | wxFONTENCODING_KOI8 | |
157 | ||
158 | ||
159 | The standard Russian encoding for Internet. | |
160 | ||
161 | wxFONTENCODING_CP1250...1252 | |
162 | ||
163 | ||
164 | Windows encodings similar to ISO8859 (but not identical). | |
165 | ||
166 | If the specified encoding isn't available, no font is created | |
167 | (see also font encoding overview). | |
168 | ||
169 | @remarks If the desired font does not exist, the closest match will be | |
170 | chosen. Under Windows, only scalable TrueType fonts | |
171 | are used. | |
172 | */ | |
173 | wxFont(); | |
174 | wxFont(const wxFont& font); | |
175 | wxFont(int pointSize, wxFontFamily family, int style, | |
176 | wxFontWeight weight, | |
177 | const bool underline = @false, | |
178 | const wxString& faceName = "", | |
179 | wxFontEncoding encoding = wxFONTENCODING_DEFAULT); | |
180 | wxFont(const wxSize& pixelSize, wxFontFamily family, | |
181 | int style, wxFontWeight weight, | |
182 | const bool underline = @false, | |
183 | const wxString& faceName = "", | |
184 | wxFontEncoding encoding = wxFONTENCODING_DEFAULT); | |
185 | //@} | |
186 | ||
187 | /** | |
188 | Destructor. | |
189 | See @ref overview_refcountdestruct "reference-counted object destruction" for | |
190 | more info. | |
191 | ||
192 | @remarks Although all remaining fonts are deleted when the application | |
193 | exits, the application should try to clean up all | |
194 | fonts itself. This is because wxWidgets cannot know | |
195 | if a pointer to the font object is stored in an | |
196 | application data structure, and there is a risk of | |
197 | double deletion. | |
198 | */ | |
199 | ~wxFont(); | |
200 | ||
201 | /** | |
202 | Returns the current application's default encoding. | |
203 | ||
204 | @sa @ref overview_wxfontencodingoverview "Font encoding overview", | |
205 | SetDefaultEncoding() | |
206 | */ | |
207 | static wxFontEncoding GetDefaultEncoding(); | |
208 | ||
209 | /** | |
210 | Returns the typeface name associated with the font, or the empty string if | |
211 | there is no | |
212 | typeface information. | |
213 | ||
214 | @sa SetFaceName() | |
215 | */ | |
216 | wxString GetFaceName(); | |
217 | ||
218 | /** | |
219 | Gets the font family. See SetFamily() for a list of valid | |
220 | family identifiers. | |
221 | ||
222 | @sa SetFamily() | |
223 | */ | |
224 | wxFontFamily GetFamily(); | |
225 | ||
226 | /** | |
227 | Returns the platform-dependent string completely describing this font. | |
228 | Returned string is always non-empty. | |
229 | Note that the returned string is not meant to be shown or edited by the user: a | |
230 | typical | |
231 | use of this function is for serializing in string-form a wxFont object. | |
232 | ||
233 | @sa SetNativeFontInfo(),GetNativeFontInfoUserDesc() | |
234 | */ | |
235 | wxString GetNativeFontInfoDesc(); | |
236 | ||
237 | /** | |
238 | Returns a user-friendly string for this font object. Returned string is always | |
239 | non-empty. | |
240 | Some examples of the formats of returned strings (which are platform-dependent) | |
241 | are in SetNativeFontInfoUserDesc(). | |
242 | ||
243 | @sa GetNativeFontInfoDesc() | |
244 | */ | |
245 | wxString GetNativeFontInfoUserDesc(); | |
246 | ||
247 | /** | |
248 | Gets the point size. | |
249 | ||
250 | @sa SetPointSize() | |
251 | */ | |
252 | int GetPointSize(); | |
253 | ||
254 | /** | |
255 | Gets the font style. See wxFont() for a list of valid | |
256 | styles. | |
257 | ||
258 | @sa SetStyle() | |
259 | */ | |
260 | int GetStyle(); | |
261 | ||
262 | /** | |
263 | Returns @true if the font is underlined, @false otherwise. | |
264 | ||
265 | @sa SetUnderlined() | |
266 | */ | |
267 | bool GetUnderlined(); | |
268 | ||
269 | /** | |
270 | Gets the font weight. See wxFont() for a list of valid | |
271 | weight identifiers. | |
272 | ||
273 | @sa SetWeight() | |
274 | */ | |
275 | wxFontWeight GetWeight(); | |
276 | ||
277 | /** | |
278 | Returns @true if the font is a fixed width (or monospaced) font, | |
279 | @false if it is a proportional one or font is invalid. | |
280 | */ | |
281 | bool IsFixedWidth(); | |
282 | ||
283 | /** | |
284 | Returns @true if this object is a valid font, @false otherwise. | |
285 | */ | |
286 | #define bool IsOk() /* implementation is private */ | |
287 | ||
288 | //@{ | |
289 | /** | |
290 | These functions take the same parameters as @ref ctor() wxFont | |
291 | constructor and return a new font object allocated on the heap. | |
292 | ||
293 | Using @c New() is currently the only way to directly create a font with | |
294 | the given size in pixels on platforms other than wxMSW. | |
295 | */ | |
296 | static wxFont * New(int pointSize, wxFontFamily family, | |
297 | int style, | |
298 | wxFontWeight weight, | |
299 | const bool underline = @false, | |
300 | const wxString& faceName = "", | |
301 | wxFontEncoding encoding = wxFONTENCODING_DEFAULT); | |
302 | static wxFont * New(int pointSize, wxFontFamily family, | |
303 | int flags = wxFONTFLAG_DEFAULT, | |
304 | const wxString& faceName = "", | |
305 | wxFontEncoding encoding = wxFONTENCODING_DEFAULT); | |
306 | static wxFont * New(const wxSize& pixelSize, | |
307 | wxFontFamily family, | |
308 | int style, | |
309 | wxFontWeight weight, | |
310 | const bool underline = @false, | |
311 | const wxString& faceName = "", | |
312 | wxFontEncoding encoding = wxFONTENCODING_DEFAULT); | |
313 | static wxFont * New(const wxSize& pixelSize, | |
314 | wxFontFamily family, | |
315 | int flags = wxFONTFLAG_DEFAULT, | |
316 | const wxString& faceName = "", | |
317 | wxFontEncoding encoding = wxFONTENCODING_DEFAULT); | |
318 | //@} | |
319 | ||
320 | /** | |
321 | Sets the default font encoding. | |
322 | ||
323 | @sa @ref overview_wxfontencodingoverview "Font encoding overview", | |
324 | GetDefaultEncoding() | |
325 | */ | |
326 | static void SetDefaultEncoding(wxFontEncoding encoding); | |
327 | ||
328 | /** | |
329 | Sets the facename for the font. | |
330 | Returns @true if the given face name exists; @false otherwise. | |
331 | ||
332 | @param faceName | |
333 | A valid facename, which should be on the end-user's system. | |
334 | ||
335 | @remarks To avoid portability problems, don't rely on a specific face, | |
336 | but specify the font family instead or as well. A | |
337 | suitable font will be found on the end-user's system. | |
338 | If both the family and the facename are specified, | |
339 | wxWidgets will first search for the specific face, | |
340 | and then for a font belonging to the same family. | |
341 | ||
342 | @sa GetFaceName(), SetFamily() | |
343 | */ | |
344 | bool SetFaceName(const wxString& faceName); | |
345 | ||
346 | /** | |
347 | Sets the font family. | |
348 | ||
349 | @param family | |
350 | One of: | |
351 | ||
352 | ||
353 | wxFONTFAMILY_DEFAULT | |
354 | ||
355 | ||
356 | Chooses a default font. | |
357 | ||
358 | wxFONTFAMILY_DECORATIVE | |
359 | ||
360 | ||
361 | A decorative font. | |
362 | ||
363 | wxFONTFAMILY_ROMAN | |
364 | ||
365 | ||
366 | A formal, serif font. | |
367 | ||
368 | wxFONTFAMILY_SCRIPT | |
369 | ||
370 | ||
371 | A handwriting font. | |
372 | ||
373 | wxFONTFAMILY_SWISS | |
374 | ||
375 | ||
376 | A sans-serif font. | |
377 | ||
378 | wxFONTFAMILY_MODERN | |
379 | ||
380 | ||
381 | A fixed pitch font. | |
382 | ||
383 | wxFONTFAMILY_TELETYPE | |
384 | ||
385 | ||
386 | A teletype font. | |
387 | ||
388 | @sa GetFamily(), SetFaceName() | |
389 | */ | |
390 | void SetFamily(wxFontFamily family); | |
391 | ||
392 | /** | |
393 | Creates the font corresponding to the given native font description string and | |
394 | returns @true if | |
395 | the creation was successful. | |
396 | which must have been previously returned by | |
397 | GetNativeFontInfoDesc(). If the string is | |
398 | invalid, font is unchanged. This function is typically used for de-serializing | |
399 | a wxFont | |
400 | object previously saved in a string-form. | |
401 | ||
402 | @sa SetNativeFontInfoUserDesc() | |
403 | */ | |
404 | bool SetNativeFontInfo(const wxString& info); | |
405 | ||
406 | /** | |
407 | Creates the font corresponding to the given native font description string and | |
408 | returns @true if | |
409 | the creation was successful. | |
410 | Unlike SetNativeFontInfo(), this function accepts | |
411 | strings which are user-friendly. | |
412 | Examples of accepted string formats are: | |
413 | ||
414 | ||
415 | Generic syntax | |
416 | ||
417 | ||
418 | Example | |
419 | ||
420 | on @b wxGTK2: @c [FACE-NAME] [bold] [oblique|italic] [POINTSIZE] | |
421 | ||
422 | ||
423 | Monospace bold 10 | |
424 | ||
425 | on @b wxMSW: @c [light|bold] [italic] [FACE-NAME] [POINTSIZE] [ENCODING] | |
426 | ||
427 | ||
428 | Tahoma 10 WINDOWS-1252 | |
429 | ||
430 | on @b wxMac: FIXME | |
431 | ||
432 | ||
433 | FIXME | |
434 | ||
435 | For more detailed information about the allowed syntaxes you can look at the | |
436 | documentation of the native API used for font-rendering (e.g. pango_font_description_from_string). | |
437 | ||
438 | @sa SetNativeFontInfo() | |
439 | */ | |
440 | bool SetNativeFontInfoUserDesc(const wxString& info); | |
441 | ||
442 | /** | |
443 | Sets the point size. | |
444 | ||
445 | @param pointSize | |
446 | Size in points. | |
447 | ||
448 | @sa GetPointSize() | |
449 | */ | |
450 | void SetPointSize(int pointSize); | |
451 | ||
452 | /** | |
453 | Sets the font style. | |
454 | ||
455 | @param style | |
456 | One of wxFONTSTYLE_NORMAL, wxFONTSTYLE_SLANT and wxFONTSTYLE_ITALIC. | |
457 | ||
458 | @sa GetStyle() | |
459 | */ | |
460 | void SetStyle(int style); | |
461 | ||
462 | /** | |
463 | Sets underlining. | |
464 | ||
465 | @param underlining | |
466 | @true to underline, @false otherwise. | |
467 | ||
468 | @sa GetUnderlined() | |
469 | */ | |
470 | void SetUnderlined(const bool underlined); | |
471 | ||
472 | /** | |
473 | Sets the font weight. | |
474 | ||
475 | @param weight | |
476 | One of: | |
477 | ||
478 | ||
479 | wxFONTWEIGHT_NORMAL | |
480 | ||
481 | ||
482 | Normal font. | |
483 | ||
484 | wxFONTWEIGHT_LIGHT | |
485 | ||
486 | ||
487 | Light font. | |
488 | ||
489 | wxFONTWEIGHT_BOLD | |
490 | ||
491 | ||
492 | Bold font. | |
493 | ||
494 | @sa GetWeight() | |
495 | */ | |
496 | void SetWeight(wxFontWeight weight); | |
497 | ||
498 | /** | |
499 | Inequality operator. | |
500 | See @ref overview_refcountequality "reference-counted object comparison" for | |
501 | more info. | |
502 | */ | |
503 | bool operator !=(const wxFont& font); | |
504 | ||
505 | /** | |
506 | Assignment operator, using @ref overview_trefcount "reference counting". | |
507 | */ | |
508 | wxFont operator =(const wxFont& font); | |
509 | ||
510 | /** | |
511 | Equality operator. | |
512 | See @ref overview_refcountequality "reference-counted object comparison" for | |
513 | more info. | |
514 | */ | |
515 | bool operator ==(const wxFont& font); | |
516 | }; |