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1///////////////////////////////////////////////////////////////////////////////
2// Name: wx/textentry.h
3// Purpose: declares wxTextEntry interface defining a simple text entry
4// Author: Vadim Zeitlin
5// Created: 2007-09-24
6// RCS-ID: $Id$
7// Copyright: (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
8// Licence: wxWindows licence
9///////////////////////////////////////////////////////////////////////////////
10
11#ifndef _WX_TEXTENTRY_H_
12#define _WX_TEXTENTRY_H_
13
14// wxTextPos is the position in the text (currently it's hardly used anywhere
15// and should probably be replaced with int anyhow)
16typedef long wxTextPos;
17
b4782e57 18class WXDLLIMPEXP_FWD_BASE wxArrayString;
ea98f11c 19class WXDLLIMPEXP_FWD_CORE wxTextCompleter;
63f7d502 20class WXDLLIMPEXP_FWD_CORE wxTextEntryHintData;
a95f37bc 21class WXDLLIMPEXP_FWD_CORE wxWindow;
b4782e57 22
03dede4d 23#include "wx/filefn.h" // for wxFILE and wxDIR only
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24#include "wx/gdicmn.h" // for wxPoint
25
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26// ----------------------------------------------------------------------------
27// wxTextEntryBase
28// ----------------------------------------------------------------------------
29
30class WXDLLIMPEXP_CORE wxTextEntryBase
31{
32public:
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33 wxTextEntryBase() { m_eventsBlock = 0; m_hintData = NULL; }
34 virtual ~wxTextEntryBase();
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35
36
37 // accessing the value
38 // -------------------
39
40 // SetValue() generates a text change event, ChangeValue() doesn't
41 virtual void SetValue(const wxString& value)
42 { DoSetValue(value, SetValue_SendEvent); }
7bfc104b 43 virtual void ChangeValue(const wxString& value);
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44
45 // writing text inserts it at the current position replacing any current
46 // selection, appending always inserts it at the end and doesn't remove any
47 // existing text (but it will reset the selection if there is any)
48 virtual void WriteText(const wxString& text) = 0;
49 virtual void AppendText(const wxString& text);
50
135b23b2 51 virtual wxString GetValue() const;
0ec1179b 52 virtual wxString GetRange(long from, long to) const;
a7507230 53 bool IsEmpty() const { return GetLastPosition() <= 0; }
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54
55
56 // editing operations
57 // ------------------
58
59 virtual void Replace(long from, long to, const wxString& value);
60 virtual void Remove(long from, long to) = 0;
61 virtual void Clear() { SetValue(wxString()); }
5a25f858 62 void RemoveSelection();
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63
64
65 // clipboard operations
66 // --------------------
67
68 virtual void Copy() = 0;
69 virtual void Cut() = 0;
70 virtual void Paste() = 0;
71
72 virtual bool CanCopy() const;
73 virtual bool CanCut() const;
74 virtual bool CanPaste() const;
75
76 // undo/redo
77 // ---------
78
79 virtual void Undo() = 0;
80 virtual void Redo() = 0;
81
82 virtual bool CanUndo() const = 0;
83 virtual bool CanRedo() const = 0;
84
85
86 // insertion point
87 // ---------------
88
89 // note that moving insertion point removes any current selection
90 virtual void SetInsertionPoint(long pos) = 0;
91 virtual void SetInsertionPointEnd() { SetInsertionPoint(-1); }
92 virtual long GetInsertionPoint() const = 0;
93 virtual long GetLastPosition() const = 0;
94
95
96 // selection
97 // ---------
98
99 virtual void SetSelection(long from, long to) = 0;
e0721133 100 virtual void SelectAll() { SetSelection(-1, -1); }
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101 virtual void SelectNone()
102 { const long pos = GetInsertionPoint(); SetSelection(pos, pos); }
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103 virtual void GetSelection(long *from, long *to) const = 0;
104 bool HasSelection() const;
105 virtual wxString GetStringSelection() const;
106
978c6e41 107
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108 // auto-completion
109 // ---------------
110
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111 // these functions allow to auto-complete the text already entered into the
112 // control using either the given fixed list of strings, the paths from the
ea98f11c 113 // file system or an arbitrary user-defined completer
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114 //
115 // they all return true if completion was enabled or false on error (most
116 // commonly meaning that this functionality is not available under the
117 // current platform)
118
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119 bool AutoComplete(const wxArrayString& choices)
120 { return DoAutoCompleteStrings(choices); }
59396417 121
574479e8 122 bool AutoCompleteFileNames()
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123 { return DoAutoCompleteFileNames(wxFILE); }
124
125 bool AutoCompleteDirectories()
126 { return DoAutoCompleteFileNames(wxDIR); }
ecaed0bc 127
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128 // notice that we take ownership of the pointer and will delete it
129 //
130 // if the pointer is NULL auto-completion is disabled
131 bool AutoComplete(wxTextCompleter *completer)
132 { return DoAutoCompleteCustom(completer); }
133
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134
135 // status
136 // ------
ecaed0bc 137
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138 virtual bool IsEditable() const = 0;
139 virtual void SetEditable(bool editable) = 0;
140
141
142 // set the max number of characters which may be entered in a single line
143 // text control
144 virtual void SetMaxLength(unsigned long WXUNUSED(len)) { }
145
146
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147 // hints
148 // -----
149
150 // hint is the (usually greyed out) text shown in the control as long as
151 // it's empty and doesn't have focus, it is typically used in controls used
152 // for searching to let the user know what is supposed to be entered there
153
154 virtual bool SetHint(const wxString& hint);
155 virtual wxString GetHint() const;
156
157
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158 // margins
159 // -------
160
161 // margins are the empty space between borders of control and the text
162 // itself. When setting margin, use value -1 to indicate that specific
163 // margin should not be changed.
164
165 bool SetMargins(const wxPoint& pt)
166 { return DoSetMargins(pt); }
167 bool SetMargins(wxCoord left, wxCoord top = -1)
168 { return DoSetMargins(wxPoint(left, top)); }
169 wxPoint GetMargins() const
170 { return DoGetMargins(); }
171
50135807 172
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173 // implementation only
174 // -------------------
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175
176 // generate the wxEVT_COMMAND_TEXT_UPDATED event for GetEditableWindow(),
177 // like SetValue() does and return true if the event was processed
178 //
179 // NB: this is public for wxRichTextCtrl use only right now, do not call it
180 static bool SendTextUpdatedEvent(wxWindow *win);
181
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182 // generate the wxEVT_COMMAND_TEXT_UPDATED event for this window
183 bool SendTextUpdatedEvent()
184 {
185 return SendTextUpdatedEvent(GetEditableWindow());
186 }
187
188
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189 // generate the wxEVT_COMMAND_TEXT_UPDATED event for this window if the
190 // events are not currently disabled
191 void SendTextUpdatedEventIfAllowed()
192 {
193 if ( EventsAllowed() )
194 SendTextUpdatedEvent();
195 }
196
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197 // this function is provided solely for the purpose of forwarding text
198 // change notifications state from one control to another, e.g. it can be
199 // used by a wxComboBox which derives from wxTextEntry if it delegates all
200 // of its methods to another wxTextCtrl
201 void ForwardEnableTextChangedEvents(bool enable)
202 {
203 // it's important to call the functions which update m_eventsBlock here
204 // and not just our own EnableTextChangedEvents() because our state
205 // (i.e. the result of EventsAllowed()) must change as well
206 if ( enable )
207 ResumeTextChangedEvents();
208 else
209 SuppressTextChangedEvents();
210 }
211
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212protected:
213 // flags for DoSetValue(): common part of SetValue() and ChangeValue() and
214 // also used to implement WriteText() in wxMSW
215 enum
216 {
217 SetValue_NoEvent = 0,
218 SetValue_SendEvent = 1,
219 SetValue_SelectionOnly = 2
220 };
221
222 virtual void DoSetValue(const wxString& value, int flags);
135b23b2 223 virtual wxString DoGetValue() const = 0;
0ec1179b 224
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225 // override this to return the associated window, it will be used for event
226 // generation and also by generic hints implementation
227 virtual wxWindow *GetEditableWindow() = 0;
228
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229 // margins functions
230 virtual bool DoSetMargins(const wxPoint& pt);
231 virtual wxPoint DoGetMargins() const;
232
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233 // the derived classes should override these virtual methods to implement
234 // auto-completion, they do the same thing as their public counterparts but
235 // have different names to allow overriding just one of them without hiding
236 // the other one(s)
237 virtual bool DoAutoCompleteStrings(const wxArrayString& WXUNUSED(choices))
238 { return false; }
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239 virtual bool DoAutoCompleteFileNames(int WXUNUSED(flags)) // wxFILE | wxDIR
240 { return false; }
ea98f11c 241 virtual bool DoAutoCompleteCustom(wxTextCompleter *completer);
574479e8 242
4ba5f250 243
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244 // class which should be used to temporarily disable text change events
245 //
246 // if suppress argument in ctor is false, nothing is done
247 class EventsSuppressor
248 {
249 public:
250 EventsSuppressor(wxTextEntryBase *text, bool suppress = true)
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251 : m_text(text),
252 m_suppress(suppress)
0ec1179b 253 {
0ec1179b 254 if ( m_suppress )
0ec1179b 255 m_text->SuppressTextChangedEvents();
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256 }
257
258 ~EventsSuppressor()
259 {
260 if ( m_suppress )
261 m_text->ResumeTextChangedEvents();
262 }
263
264 private:
265 wxTextEntryBase *m_text;
266 bool m_suppress;
267 };
3b49331b 268
558820fd 269 friend class EventsSuppressor;
0ec1179b 270
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271private:
272 // suppress or resume the text changed events generation: don't use these
273 // functions directly, use EventsSuppressor class above instead
274 void SuppressTextChangedEvents()
275 {
276 if ( !m_eventsBlock++ )
277 EnableTextChangedEvents(false);
278 }
279
280 void ResumeTextChangedEvents()
281 {
282 if ( !--m_eventsBlock )
283 EnableTextChangedEvents(true);
284 }
285
286
287 // this must be overridden in the derived classes if our implementation of
288 // SetValue() or Replace() is used to disable (and enable back) generation
289 // of the text changed events
290 //
291 // initially the generation of the events is enabled
292 virtual void EnableTextChangedEvents(bool WXUNUSED(enable)) { }
293
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294 // return true if the events are currently not suppressed
295 bool EventsAllowed() const { return m_eventsBlock == 0; }
296
297
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298 // if this counter is non-null, events are blocked
299 unsigned m_eventsBlock;
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300
301 // hint-related stuff, only allocated if/when SetHint() is used
302 wxTextEntryHintData *m_hintData;
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303
304 // It needs to call our Do{Get,Set}Value() to work with the real control
305 // contents.
306 friend class wxTextEntryHintData;
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307};
308
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309#ifdef __WXUNIVERSAL__
310 // TODO: we need to use wxTextEntryDelegate here, but for now just prevent
311 // the GTK/MSW classes from being used in wxUniv build
312 class WXDLLIMPEXP_CORE wxTextEntry : public wxTextEntryBase
313 {
314 };
315#elif defined(__WXGTK20__)
0ec1179b 316 #include "wx/gtk/textentry.h"
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317#elif defined(__WXMAC__)
318 #include "wx/osx/textentry.h"
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319#elif defined(__WXMSW__)
320 #include "wx/msw/textentry.h"
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321#elif defined(__WXMOTIF__)
322 #include "wx/motif/textentry.h"
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323#elif defined(__WXPM__)
324 #include "wx/os2/textentry.h"
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325#else
326 // no platform-specific implementation of wxTextEntry yet
327 class WXDLLIMPEXP_CORE wxTextEntry : public wxTextEntryBase
328 {
329 };
330#endif
331
332#endif // _WX_TEXTENTRY_H_
333