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Correctly initialise ref count in custom scheme class factory.
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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 Sets the control's label.
157
158 All "&" characters in the @a label are special and indicate that the
159 following character is a @e mnemonic for this control and can be used to
160 activate it from the keyboard (typically by using @e Alt key in
161 combination with it). To insert a literal ampersand character, you need
57ab6f23 162 to double it, i.e. use "&&". If this behaviour is undesirable, use
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163 SetLabelText() instead.
164 */
165 void SetLabel(const wxString& label);
166
167 /**
168 Sets the control's label to exactly the given string.
169
170 Unlike SetLabel(), this function shows exactly the @a text passed to it
171 in the control, without interpreting ampersands in it in any way.
172 Notice that it means that the control can't have any mnemonic defined
173 for it using this function.
174
175 @see EscapeMnemonics()
176 */
177 void SetLabelText(const wxString& text);
178
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179 // NB: when writing docs for the following function remember that Doxygen
180 // will always expand HTML entities (e.g. ") and thus we need to
181 // write e.g. "<" to have in the output the "<" string.
182
183 /**
184 Sets the controls label to a string using markup.
185
186 Simple markup supported by this function can be used to apply different
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187 fonts or colours to different parts of the control label when supported.
188 If markup is not supported by the control or platform, it is simply
189 stripped and SetLabel() is used with the resulting string.
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190
191 For example,
192 @code
193 wxStaticText *text;
194 ...
195 text->SetLabelMarkup("<b>&amp;Bed</b> &amp;mp; "
196 "<span foreground='red'>breakfast</span> "
197 "available <big>HERE</big>");
198 @endcode
199 would show the string using bold, red and big for the corresponding
200 words under wxGTK but will simply show the string "Bed &amp; breakfast
201 available HERE" on the other platforms. In any case, the "B" of "Bed"
202 will be underlined to indicate that it can be used as a mnemonic for
203 this control.
204
205 The supported tags are:
206 <TABLE>
207 <TR>
208 <TD><b>Tag</b></TD>
209 <TD><b>Description</b></TD>
210 </TR>
211 <TR>
212 <TD>&lt;b&gt;</TD>
213 <TD>bold text</TD>
214 </TR>
215 <TR>
216 <TD>&lt;big&gt;</TD>
217 <TD>bigger text</TD>
218 </TR>
219 <TR>
220 <TD>&lt;i&gt;</TD>
221 <TD>italic text</TD>
222 </TR>
223 <TR>
224 <TD>&lt;s&gt;</TD>
225 <TD>strike-through text</TD>
226 </TR>
227 <TR>
228 <TD>&lt;small&gt;</TD>
229 <TD>smaller text</TD>
230 </TR>
231 <TR>
232 <TD>&lt;tt&gt;</TD>
233 <TD>monospaced text</TD>
234 </TR>
235 <TR>
236 <TD>&lt;u&gt;</TD>
237 <TD>underlined text</TD>
238 </TR>
239 <TR>
240 <TD>&lt;span&gt;</TD>
241 <TD>generic formatter tag, see the table below for supported
242 attributes.
243 </TD>
244 </TR>
245 </TABLE>
246
247 Supported @c &lt;span&gt; attributes:
248 <TABLE>
249 <TR>
250 <TD><b>Name</b></TD>
251 <TD><b>Description</b></TD>
252 </TR>
253 <TR>
254 <TD>foreground, fgcolor, color</TD>
255 <TD>Foreground text colour, can be a name or RGB value.</TD>
256 </TR>
257 <TR>
258 <TD>background, bgcolor</TD>
259 <TD>Background text colour, can be a name or RGB value.</TD>
260 </TR>
261 <TR>
262 <TD>font_family, face</TD>
263 <TD>Font face name.</TD>
264 </TR>
265 <TR>
266 <TD>font_weight, weight</TD>
267 <TD>Numeric value in 0..900 range or one of "ultralight",
268 "light", "normal" (all meaning non-bold), "bold", "ultrabold"
269 and "heavy" (all meaning bold).</TD>
270 </TR>
271 <TR>
272 <TD>font_style, style</TD>
273 <TD>Either "oblique" or "italic" (both with the same meaning)
274 or "normal".</TD>
275 </TR>
276 <TR>
277 <TD>size</TD>
278 <TD>The font size can be specified either as "smaller" or
279 "larger" relatively to the current font, as a CSS font size
280 name ("xx-small", "x-small", "small", "medium", "large",
281 "x-large" or "xx-large") or as a number giving font size in
282 1024th parts of a point, i.e. 10240 for a 10pt font.</TD>
283 </TR>
284 </TABLE>
285
286 This markup language is a strict subset of Pango markup (described at
287 http://library.gnome.org/devel/pango/unstable/PangoMarkupFormat.html)
288 and any tags and span attributes not documented above can't be used
289 under non-GTK platforms.
290
291 Also note that you need to escape the following special characters:
292 <TABLE>
293 <TR>
294 <TD><b>Special character</b></TD>
295 <TD><b>Escape as</b></TD>
296 </TR>
297 <TR>
298 <TD>@c &amp;</TD>
299 <TD>@c &amp;amp; or as @c &amp;&amp;</TD>
300 </TR>
301 <TR>
302 <TD>@c &apos;</TD>
303 <TD>@c &amp;apos;</TD>
304 </TR>
305 <TR>
306 <TD>@c &quot;</TD>
307 <TD>@c &amp;quot;</TD>
308 </TR>
309 <TR>
310 <TD>@c &lt;</TD>
311 <TD>@c &amp;lt;</TD>
312 </TR>
313 <TR>
314 <TD>@c &gt;</TD>
315 <TD>@c &amp;gt;</TD>
316 </TR>
317 </TABLE>
318
319 The non-escaped ampersand @c &amp; characters are interpreted as
320 mnemonics as with wxControl::SetLabel.
321
322
323 @param markup
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324 String containing markup for the label. It may contain markup tags
325 described above and newline characters but currently only wxGTK and
326 wxOSX support multiline labels with markup, the generic
327 implementation (also used in wxMSW) only handles single line markup
328 labels. Notice that the string must be well-formed (e.g. all tags
329 must be correctly closed) and won't be shown at all otherwise.
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330 @return
331 @true if the new label was set (even if markup in it was ignored)
332 or @false if we failed to parse the markup. In this case the label
333 remains unchanged.
334
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335
336 Currently wxButton supports markup in all major ports (wxMSW, wxGTK and
337 wxOSX/Cocoa) while wxStaticText supports it in wxGTK and wxOSX and its
338 generic version (which can be used under MSW if markup support is
339 required). Extending support to more controls is planned in the future.
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340
341 @since 2.9.2
342 */
343 bool SetLabelMarkup(const wxString& markup);
344
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345
346public: // static functions
347
bd0812fe 348 /**
4520d583 349 Returns the given @a label string without mnemonics ("&" characters).
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350 */
351 static wxString GetLabelText(const wxString& label);
23324ae1 352
4520d583 353 /**
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354 Returns the given @a str string without mnemonics ("&" characters).
355
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356 @note This function is identical to GetLabelText() and is provided
357 mostly for symmetry with EscapeMnemonics().
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358 */
359 static wxString RemoveMnemonics(const wxString& str);
360
5b8b2c84 361 /**
32ee98eb 362 Escapes the special mnemonics characters ("&") in the given string.
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363
364 This function can be helpful if you need to set the controls label to a
365 user-provided string. If the string contains ampersands, they wouldn't
366 appear on the display but be used instead to indicate that the
367 character following the first of them can be used as a control mnemonic.
368 While this can sometimes be desirable (e.g. to allow the user to
369 configure mnemonics of the controls), more often you will want to use
370 this function before passing a user-defined string to SetLabel().
371 Alternatively, if the label is entirely user-defined, you can just call
372 SetLabelText() directly -- but this function must be used if the label
373 is a combination of a part defined by program containing the control
374 mnemonics and a user-defined part.
375
376 @param text
377 The string such as it should appear on the display.
378 @return
379 The same string with the ampersands in it doubled.
380 */
381 static wxString EscapeMnemonics(const wxString& text);
382
23324ae1 383 /**
32ee98eb 384 Replaces parts of the @a label string with ellipsis, if needed, so
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385 that it fits into @a maxWidth pixels if possible.
386
387 Note that this function does @em not guarantee that the returned string
388 will always be shorter than @a maxWidth; if @a maxWidth is extremely
389 small, ellipsized text may be larger.
bd0812fe 390
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391 @param label
392 The string to ellipsize
393 @param dc
394 The DC used to retrieve the character widths through the
395 wxDC::GetPartialTextExtents() function.
396 @param mode
397 The ellipsization mode. This is the setting which determines
398 which part of the string should be replaced by the ellipsis.
399 See ::wxEllipsizeMode enumeration values for more info.
400 @param maxWidth
401 The maximum width of the returned string in pixels.
402 This argument determines how much characters of the string need to
403 be removed (and replaced by ellipsis).
404 @param flags
405 One or more of the ::wxEllipsizeFlags enumeration values combined.
23324ae1 406 */
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407 static wxString Ellipsize(const wxString& label, const wxDC& dc,
408 wxEllipsizeMode mode, int maxWidth,
409 int flags = wxELLIPSIZE_FLAGS_DEFAULT);
23324ae1 410};
e54c96f1 411