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1/////////////////////////////////////////////////////////////////////////////
2// Name: control.h
e54c96f1 3// Purpose: interface of wxControl
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4// Author: wxWidgets team
5// RCS-ID: $Id$
526954c5 6// Licence: wxWindows licence
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7/////////////////////////////////////////////////////////////////////////////
8
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9/**
10 Flags used by wxControl::Ellipsize function.
11*/
12enum wxEllipsizeFlags
13{
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14 /// No special flags.
15 wxELLIPSIZE_FLAGS_NONE = 0,
16
17 /**
18 Take mnemonics into account when calculating the text width.
19
20 With this flag when calculating the size of the passed string,
21 mnemonics characters (see wxControl::SetLabel) will be automatically
22 reduced to a single character. This leads to correct calculations only
23 if the string passed to Ellipsize() will be used with
24 wxControl::SetLabel. If you don't want ampersand to be interpreted as
25 mnemonics (e.g. because you use wxControl::SetLabelText) then don't use
26 this flag.
27 */
28 wxELLIPSIZE_FLAGS_PROCESS_MNEMONICS = 1,
29
30 /**
31 Expand tabs in spaces when calculating the text width.
32
33 This flag tells wxControl::Ellipsize() to calculate the width of tab
34 characters @c '\\t' as 6 spaces.
35 */
36 wxELLIPSIZE_FLAGS_EXPAND_TABS = 2,
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37
38 /// The default flags for wxControl::Ellipsize.
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39 wxELLIPSIZE_FLAGS_DEFAULT = wxELLIPSIZE_FLAGS_PROCESS_MNEMONICS|
40 wxELLIPSIZE_FLAGS_EXPAND_TABS
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41};
42
43
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44/**
45 The different ellipsization modes supported by the
46 wxControl::Ellipsize function.
47*/
48enum wxEllipsizeMode
49{
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50 /// Don't ellipsize the text at all. @since 2.9.1
51 wxELLIPSIZE_NONE,
52
a78618b0 53 /// Put the ellipsis at the start of the string, if the string needs ellipsization.
5c87527c 54 wxELLIPSIZE_START,
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55
56 /// Put the ellipsis in the middle of the string, if the string needs ellipsization.
5c87527c 57 wxELLIPSIZE_MIDDLE,
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58
59 /// Put the ellipsis at the end of the string, if the string needs ellipsization.
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60 wxELLIPSIZE_END
61};
62
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63/**
64 @class wxControl
7c913512 65
cdbcf4c2 66 This is the base class for a control or "widget".
7c913512 67
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68 A control is generally a small window which processes user input and/or
69 displays one or more item of data.
7c913512 70
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71 @beginEventEmissionTable{wxClipboardTextEvent}
72 @event{EVT_TEXT_COPY(id, func)}
73 Some or all of the controls content was copied to the clipboard.
74 @event{EVT_TEXT_CUT(id, func)}
75 Some or all of the controls content was cut (i.e. copied and
76 deleted).
77 @event{EVT_TEXT_PASTE(id, func)}
78 Clipboard content was pasted into the control.
79 @endEventTable
80
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81 @library{wxcore}
82 @category{ctrl}
7c913512 83
e54c96f1 84 @see wxValidator
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85*/
86class wxControl : public wxWindow
87{
88public:
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89
90 /**
91 Constructs a control.
92
93 @param parent
94 Pointer to a parent window.
95 @param id
96 Control identifier. If wxID_ANY, will automatically create an identifier.
97 @param pos
98 Control position. wxDefaultPosition indicates that wxWidgets
99 should generate a default position for the control.
100 @param size
101 Control size. wxDefaultSize indicates that wxWidgets should generate
102 a default size for the window. If no suitable size can be found, the
103 window will be sized to 20x20 pixels so that the window is visible but
104 obviously not correctly sized.
105 @param style
106 Control style. For generic window styles, please see wxWindow.
107 @param name
108 Control name.
109 */
110 wxControl(wxWindow *parent, wxWindowID id,
111 const wxPoint& pos = wxDefaultPosition,
112 const wxSize& size = wxDefaultSize, long style = 0,
113 const wxValidator& validator = wxDefaultValidator,
114 const wxString& name = wxControlNameStr);
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115
116 /**
117 Default constructor to allow 2-phase creation.
118 */
119 wxControl();
120
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121 bool Create(wxWindow *parent, wxWindowID id,
122 const wxPoint& pos = wxDefaultPosition,
123 const wxSize& size = wxDefaultSize, long style = 0,
124 const wxValidator& validator = wxDefaultValidator,
125 const wxString& name = wxControlNameStr);
126
23324ae1 127 /**
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128 Simulates the effect of the user issuing a command to the item.
129
130 @see wxCommandEvent
23324ae1 131 */
b7e94bd7 132 virtual void Command(wxCommandEvent& event);
23324ae1 133
5c87527c 134 /**
32ee98eb 135 Returns the control's label, as it was passed to SetLabel().
5c87527c 136
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137 Note that the returned string may contains mnemonics ("&" characters) if they were
138 passed to the SetLabel() function; use GetLabelText() if they are undesired.
bd0812fe 139
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140 Also note that the returned string is always the string which was passed to
141 SetLabel() but may be different from the string passed to SetLabelText()
142 (since this last one escapes mnemonic characters).
23324ae1 143 */
328f5751 144 wxString GetLabel() const;
23324ae1 145
23324ae1 146 /**
bd0812fe 147 Returns the control's label without mnemonics.
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148
149 Note that because of the stripping of the mnemonics the returned string may differ
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150 from the string which was passed to SetLabel() but should always be the same which
151 was passed to SetLabelText().
23324ae1 152 */
4707b84c 153 wxString GetLabelText() const;
bd0812fe 154
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155 /**
156 Determine the size needed by the control to leave the given area for
157 its text.
158
159 This function is mostly useful with control displaying short amounts of
160 text that can be edited by the user, e.g. wxTextCtrl, wxComboBox,
161 wxSearchCtrl etc. Typically it is used to size these controls for the
162 maximal amount of input they are supposed to contain, for example:
163 @code
164 // Create a control for post code entry.
165 wxTextCtrl* postcode = new wxTextCtrl(this, ...);
166
167 // And set its initial and minimal size to be big enough for
168 // entering 5 digits.
169 postcode->SetInitialSize(
170 postcode->GetSizeFromTextSize(
171 postcode->GetTextExtent("99999")));
172 @endcode
173
174 Currently this method is only implemented for wxTextCtrl, wxComboBox
aa24f946 175 and wxChoice in wxMSW and wxGTK.
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176
177 @param xlen The horizontal extent of the area to leave for text, in
178 pixels.
179 @param ylen The vertical extent of the area to leave for text, in
180 pixels. By default -1 meaning that the vertical component of the
181 returned size should be the default height of this control.
182 @return The size that the control should have to leave the area of the
183 specified size for its text. May return wxDefaultSize if this
184 method is not implemented for this particular control under the
185 current platform.
186
187 @since 2.9.5
188 */
189 wxSize GetSizeFromTextSize(int xlen, int ylen = -1) const;
190
191 /**
192 @overload
193 */
194 wxSize GetSizeFromTextSize(const wxSize& tsize) const;
195
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196 /**
197 Sets the control's label.
198
199 All "&" characters in the @a label are special and indicate that the
200 following character is a @e mnemonic for this control and can be used to
201 activate it from the keyboard (typically by using @e Alt key in
202 combination with it). To insert a literal ampersand character, you need
57ab6f23 203 to double it, i.e. use "&&". If this behaviour is undesirable, use
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204 SetLabelText() instead.
205 */
206 void SetLabel(const wxString& label);
207
208 /**
209 Sets the control's label to exactly the given string.
210
211 Unlike SetLabel(), this function shows exactly the @a text passed to it
212 in the control, without interpreting ampersands in it in any way.
213 Notice that it means that the control can't have any mnemonic defined
214 for it using this function.
215
216 @see EscapeMnemonics()
217 */
218 void SetLabelText(const wxString& text);
219
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220 // NB: when writing docs for the following function remember that Doxygen
221 // will always expand HTML entities (e.g. ") and thus we need to
222 // write e.g. "<" to have in the output the "<" string.
223
224 /**
225 Sets the controls label to a string using markup.
226
227 Simple markup supported by this function can be used to apply different
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228 fonts or colours to different parts of the control label when supported.
229 If markup is not supported by the control or platform, it is simply
230 stripped and SetLabel() is used with the resulting string.
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231
232 For example,
233 @code
234 wxStaticText *text;
235 ...
236 text->SetLabelMarkup("<b>&amp;Bed</b> &amp;mp; "
237 "<span foreground='red'>breakfast</span> "
238 "available <big>HERE</big>");
239 @endcode
240 would show the string using bold, red and big for the corresponding
241 words under wxGTK but will simply show the string "Bed &amp; breakfast
242 available HERE" on the other platforms. In any case, the "B" of "Bed"
243 will be underlined to indicate that it can be used as a mnemonic for
244 this control.
245
246 The supported tags are:
247 <TABLE>
248 <TR>
249 <TD><b>Tag</b></TD>
250 <TD><b>Description</b></TD>
251 </TR>
252 <TR>
253 <TD>&lt;b&gt;</TD>
254 <TD>bold text</TD>
255 </TR>
256 <TR>
257 <TD>&lt;big&gt;</TD>
258 <TD>bigger text</TD>
259 </TR>
260 <TR>
261 <TD>&lt;i&gt;</TD>
262 <TD>italic text</TD>
263 </TR>
264 <TR>
265 <TD>&lt;s&gt;</TD>
266 <TD>strike-through text</TD>
267 </TR>
268 <TR>
269 <TD>&lt;small&gt;</TD>
270 <TD>smaller text</TD>
271 </TR>
272 <TR>
273 <TD>&lt;tt&gt;</TD>
274 <TD>monospaced text</TD>
275 </TR>
276 <TR>
277 <TD>&lt;u&gt;</TD>
278 <TD>underlined text</TD>
279 </TR>
280 <TR>
281 <TD>&lt;span&gt;</TD>
282 <TD>generic formatter tag, see the table below for supported
283 attributes.
284 </TD>
285 </TR>
286 </TABLE>
287
288 Supported @c &lt;span&gt; attributes:
289 <TABLE>
290 <TR>
291 <TD><b>Name</b></TD>
292 <TD><b>Description</b></TD>
293 </TR>
294 <TR>
295 <TD>foreground, fgcolor, color</TD>
296 <TD>Foreground text colour, can be a name or RGB value.</TD>
297 </TR>
298 <TR>
299 <TD>background, bgcolor</TD>
300 <TD>Background text colour, can be a name or RGB value.</TD>
301 </TR>
302 <TR>
303 <TD>font_family, face</TD>
304 <TD>Font face name.</TD>
305 </TR>
306 <TR>
307 <TD>font_weight, weight</TD>
308 <TD>Numeric value in 0..900 range or one of "ultralight",
309 "light", "normal" (all meaning non-bold), "bold", "ultrabold"
310 and "heavy" (all meaning bold).</TD>
311 </TR>
312 <TR>
313 <TD>font_style, style</TD>
314 <TD>Either "oblique" or "italic" (both with the same meaning)
315 or "normal".</TD>
316 </TR>
317 <TR>
318 <TD>size</TD>
319 <TD>The font size can be specified either as "smaller" or
320 "larger" relatively to the current font, as a CSS font size
321 name ("xx-small", "x-small", "small", "medium", "large",
322 "x-large" or "xx-large") or as a number giving font size in
323 1024th parts of a point, i.e. 10240 for a 10pt font.</TD>
324 </TR>
325 </TABLE>
326
327 This markup language is a strict subset of Pango markup (described at
328 http://library.gnome.org/devel/pango/unstable/PangoMarkupFormat.html)
329 and any tags and span attributes not documented above can't be used
330 under non-GTK platforms.
331
332 Also note that you need to escape the following special characters:
333 <TABLE>
334 <TR>
335 <TD><b>Special character</b></TD>
336 <TD><b>Escape as</b></TD>
337 </TR>
338 <TR>
339 <TD>@c &amp;</TD>
340 <TD>@c &amp;amp; or as @c &amp;&amp;</TD>
341 </TR>
342 <TR>
343 <TD>@c &apos;</TD>
344 <TD>@c &amp;apos;</TD>
345 </TR>
346 <TR>
347 <TD>@c &quot;</TD>
348 <TD>@c &amp;quot;</TD>
349 </TR>
350 <TR>
351 <TD>@c &lt;</TD>
352 <TD>@c &amp;lt;</TD>
353 </TR>
354 <TR>
355 <TD>@c &gt;</TD>
356 <TD>@c &amp;gt;</TD>
357 </TR>
358 </TABLE>
359
360 The non-escaped ampersand @c &amp; characters are interpreted as
361 mnemonics as with wxControl::SetLabel.
362
363
364 @param markup
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365 String containing markup for the label. It may contain markup tags
366 described above and newline characters but currently only wxGTK and
367 wxOSX support multiline labels with markup, the generic
368 implementation (also used in wxMSW) only handles single line markup
369 labels. Notice that the string must be well-formed (e.g. all tags
370 must be correctly closed) and won't be shown at all otherwise.
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371 @return
372 @true if the new label was set (even if markup in it was ignored)
373 or @false if we failed to parse the markup. In this case the label
374 remains unchanged.
375
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376
377 Currently wxButton supports markup in all major ports (wxMSW, wxGTK and
378 wxOSX/Cocoa) while wxStaticText supports it in wxGTK and wxOSX and its
379 generic version (which can be used under MSW if markup support is
380 required). Extending support to more controls is planned in the future.
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381
382 @since 2.9.2
383 */
384 bool SetLabelMarkup(const wxString& markup);
385
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386
387public: // static functions
388
bd0812fe 389 /**
4520d583 390 Returns the given @a label string without mnemonics ("&" characters).
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391 */
392 static wxString GetLabelText(const wxString& label);
23324ae1 393
4520d583 394 /**
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395 Returns the given @a str string without mnemonics ("&" characters).
396
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397 @note This function is identical to GetLabelText() and is provided
398 mostly for symmetry with EscapeMnemonics().
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399 */
400 static wxString RemoveMnemonics(const wxString& str);
401
5b8b2c84 402 /**
32ee98eb 403 Escapes the special mnemonics characters ("&") in the given string.
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404
405 This function can be helpful if you need to set the controls label to a
406 user-provided string. If the string contains ampersands, they wouldn't
407 appear on the display but be used instead to indicate that the
408 character following the first of them can be used as a control mnemonic.
409 While this can sometimes be desirable (e.g. to allow the user to
410 configure mnemonics of the controls), more often you will want to use
411 this function before passing a user-defined string to SetLabel().
412 Alternatively, if the label is entirely user-defined, you can just call
413 SetLabelText() directly -- but this function must be used if the label
414 is a combination of a part defined by program containing the control
415 mnemonics and a user-defined part.
416
417 @param text
418 The string such as it should appear on the display.
419 @return
420 The same string with the ampersands in it doubled.
421 */
422 static wxString EscapeMnemonics(const wxString& text);
423
23324ae1 424 /**
32ee98eb 425 Replaces parts of the @a label string with ellipsis, if needed, so
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426 that it fits into @a maxWidth pixels if possible.
427
428 Note that this function does @em not guarantee that the returned string
429 will always be shorter than @a maxWidth; if @a maxWidth is extremely
430 small, ellipsized text may be larger.
bd0812fe 431
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432 @param label
433 The string to ellipsize
434 @param dc
435 The DC used to retrieve the character widths through the
436 wxDC::GetPartialTextExtents() function.
437 @param mode
438 The ellipsization mode. This is the setting which determines
439 which part of the string should be replaced by the ellipsis.
440 See ::wxEllipsizeMode enumeration values for more info.
441 @param maxWidth
442 The maximum width of the returned string in pixels.
443 This argument determines how much characters of the string need to
444 be removed (and replaced by ellipsis).
445 @param flags
446 One or more of the ::wxEllipsizeFlags enumeration values combined.
23324ae1 447 */
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448 static wxString Ellipsize(const wxString& label, const wxDC& dc,
449 wxEllipsizeMode mode, int maxWidth,
450 int flags = wxELLIPSIZE_FLAGS_DEFAULT);
23324ae1 451};
e54c96f1 452