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2bda0e17 1/////////////////////////////////////////////////////////////////////////////
11e62fe6 2// Name: src/msw/choice.cpp
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3// Purpose: wxChoice
4// Author: Julian Smart
8d99be5f 5// Modified by: Vadim Zeitlin to derive from wxChoiceBase
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6// Created: 04/01/98
7// RCS-ID: $Id$
6c9a19aa 8// Copyright: (c) Julian Smart
65571936 9// Licence: wxWindows licence
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10/////////////////////////////////////////////////////////////////////////////
11
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12// ============================================================================
13// declarations
14// ============================================================================
15
16// ----------------------------------------------------------------------------
17// headers
18// ----------------------------------------------------------------------------
19
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20// For compilers that support precompilation, includes "wx.h".
21#include "wx/wxprec.h"
22
23#ifdef __BORLANDC__
8d99be5f 24 #pragma hdrstop
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25#endif
26
3180bc0e 27#if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
1e6feb95 28
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29#include "wx/choice.h"
30
2bda0e17 31#ifndef WX_PRECOMP
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32 #include "wx/utils.h"
33 #include "wx/log.h"
f6bcfd97 34 #include "wx/brush.h"
c7401637 35 #include "wx/settings.h"
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36#endif
37
38#include "wx/msw/private.h"
39
6a89f9ee 40#if wxUSE_EXTENDED_RTTI
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41WX_DEFINE_FLAGS( wxChoiceStyle )
42
3ff066a4 43wxBEGIN_FLAGS( wxChoiceStyle )
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44 // new style border flags, we put them first to
45 // use them for streaming out
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46 wxFLAGS_MEMBER(wxBORDER_SIMPLE)
47 wxFLAGS_MEMBER(wxBORDER_SUNKEN)
48 wxFLAGS_MEMBER(wxBORDER_DOUBLE)
49 wxFLAGS_MEMBER(wxBORDER_RAISED)
50 wxFLAGS_MEMBER(wxBORDER_STATIC)
51 wxFLAGS_MEMBER(wxBORDER_NONE)
3dfb79a6 52
bc9fb572 53 // old style border flags
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54 wxFLAGS_MEMBER(wxSIMPLE_BORDER)
55 wxFLAGS_MEMBER(wxSUNKEN_BORDER)
56 wxFLAGS_MEMBER(wxDOUBLE_BORDER)
57 wxFLAGS_MEMBER(wxRAISED_BORDER)
58 wxFLAGS_MEMBER(wxSTATIC_BORDER)
cb0afb26 59 wxFLAGS_MEMBER(wxBORDER)
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60
61 // standard window styles
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62 wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
63 wxFLAGS_MEMBER(wxCLIP_CHILDREN)
64 wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
65 wxFLAGS_MEMBER(wxWANTS_CHARS)
cb0afb26 66 wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
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67 wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
68 wxFLAGS_MEMBER(wxVSCROLL)
69 wxFLAGS_MEMBER(wxHSCROLL)
bc9fb572 70
3ff066a4 71wxEND_FLAGS( wxChoiceStyle )
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72
73IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControl,"wx/choice.h")
6a89f9ee 74
3ff066a4 75wxBEGIN_PROPERTIES_TABLE(wxChoice)
3dfb79a6 76 wxEVENT_PROPERTY( Select , wxEVT_COMMAND_CHOICE_SELECTED , wxCommandEvent )
c5ca409b 77
af498247 78 wxPROPERTY( Font , wxFont , SetFont , GetFont , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
3ff066a4 79 wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
3dfb79a6 80 wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
af498247 81 wxPROPERTY_FLAGS( WindowStyle , wxChoiceStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
3ff066a4 82wxEND_PROPERTIES_TABLE()
6a89f9ee 83
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84wxBEGIN_HANDLERS_TABLE(wxChoice)
85wxEND_HANDLERS_TABLE()
2bda0e17 86
3dfb79a6 87wxCONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
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88#else
89IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
90#endif
066f1b7a 91/*
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92 TODO PROPERTIES
93 selection (long)
94 content (list)
95 item
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96*/
97
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98// ============================================================================
99// implementation
100// ============================================================================
101
102// ----------------------------------------------------------------------------
103// creation
104// ----------------------------------------------------------------------------
105
106bool wxChoice::Create(wxWindow *parent,
107 wxWindowID id,
108 const wxPoint& pos,
109 const wxSize& size,
110 int n, const wxString choices[],
111 long style,
112 const wxValidator& validator,
113 const wxString& name)
2bda0e17 114{
f6bcfd97 115 // Experience shows that wxChoice vs. wxComboBox distinction confuses
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116 // quite a few people - try to help them
117 wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
118 !(style & wxCB_READONLY) &&
119 !(style & wxCB_SIMPLE),
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120 _T("this style flag is ignored by wxChoice, you ")
121 _T("probably want to use a wxComboBox") );
2bda0e17 122
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123 return CreateAndInit(parent, id, pos, size, n, choices, style,
124 validator, name);
125}
126
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127bool wxChoice::CreateAndInit(wxWindow *parent,
128 wxWindowID id,
71e57cd6 129 const wxPoint& pos,
3dfb79a6 130 const wxSize& size,
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131 int n, const wxString choices[],
132 long style,
133 const wxValidator& validator,
134 const wxString& name)
135{
136 // initialize wxControl
137 if ( !CreateControl(parent, id, pos, size, style, validator, name) )
02b7b6b0 138 return false;
2bda0e17 139
71e57cd6 140 // now create the real HWND
f31a4098 141 if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) )
02b7b6b0 142 return false;
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143
144
145 // choice/combobox normally has "white" (depends on colour scheme, of
146 // course) background rather than inheriting the parent's background
a756f210 147 SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
c92d798f 148
cc61d2eb 149 // initialize the controls contents
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150 for ( int i = 0; i < n; i++ )
151 {
152 Append(choices[i]);
153 }
2bda0e17 154
cc61d2eb 155 // and now we may finally size the control properly (if needed)
3dfb79a6 156 SetBestSize(size);
cc61d2eb 157
02b7b6b0 158 return true;
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159}
160
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161bool wxChoice::Create(wxWindow *parent,
162 wxWindowID id,
163 const wxPoint& pos,
164 const wxSize& size,
165 const wxArrayString& choices,
166 long style,
167 const wxValidator& validator,
168 const wxString& name)
169{
170 wxCArrayString chs(choices);
171 return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
172 style, validator, name);
173}
174
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175bool wxChoice::MSWShouldPreProcessMessage(WXMSG *pMsg)
176{
177 MSG *msg = (MSG *) pMsg;
178
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179 // if the dropdown list is visible, don't preprocess certain keys
180 if ( msg->message == WM_KEYDOWN
181 && (msg->wParam == VK_ESCAPE || msg->wParam == VK_RETURN) )
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182 {
183 if (::SendMessage(GetHwndOf(this), CB_GETDROPPEDSTATE, 0, 0))
184 {
185 return false;
186 }
187 }
188
189 return wxControl::MSWShouldPreProcessMessage(pMsg);
190}
191
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192WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const
193{
194 // we never have an external border
195 WXDWORD msStyle = wxControl::MSWGetStyle
196 (
197 (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
198 );
199
200 // WS_CLIPSIBLINGS is useful with wxChoice and doesn't seem to result in
201 // any problems
202 msStyle |= WS_CLIPSIBLINGS;
203
204 // wxChoice-specific styles
205 msStyle |= CBS_DROPDOWNLIST | WS_HSCROLL | WS_VSCROLL;
206 if ( style & wxCB_SORT )
207 msStyle |= CBS_SORT;
208
209 return msStyle;
210}
211
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212wxChoice::~wxChoice()
213{
214 Free();
215}
216
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217// ----------------------------------------------------------------------------
218// adding/deleting items to/from the list
219// ----------------------------------------------------------------------------
2bda0e17 220
def6fb9b 221int wxChoice::DoAppend(const wxString& item)
8d99be5f 222{
c140b7e7 223 int n = (int)SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LPARAM)item.c_str());
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224 if ( n == CB_ERR )
225 {
f6bcfd97 226 wxLogLastError(wxT("SendMessage(CB_ADDSTRING)"));
def6fb9b 227 }
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228 else // ok
229 {
230 // we need to refresh our size in order to have enough space for the
231 // newly added items
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232 if ( !IsFrozen() )
233 UpdateVisibleHeight();
71e57cd6 234 }
def6fb9b 235
31582e4e 236 InvalidateBestSize();
def6fb9b 237 return n;
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238}
239
aa61d352 240int wxChoice::DoInsert(const wxString& item, unsigned int pos)
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241{
242 wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
8228b893 243 wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index"));
243dbf1a 244
c140b7e7 245 int n = (int)SendMessage(GetHwnd(), CB_INSERTSTRING, pos, (LPARAM)item.c_str());
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246 if ( n == CB_ERR )
247 {
248 wxLogLastError(wxT("SendMessage(CB_INSERTSTRING)"));
249 }
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250 else // ok
251 {
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252 if ( !IsFrozen() )
253 UpdateVisibleHeight();
71e57cd6 254 }
243dbf1a 255
31582e4e 256 InvalidateBestSize();
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257 return n;
258}
259
aa61d352 260void wxChoice::Delete(unsigned int n)
2bda0e17 261{
8228b893 262 wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
8d99be5f 263
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264 if ( HasClientObjectData() )
265 {
266 delete GetClientObject(n);
267 }
268
8d99be5f 269 SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
71e57cd6 270
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271 if ( !IsFrozen() )
272 UpdateVisibleHeight();
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273
274 InvalidateBestSize();
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275}
276
8d99be5f 277void wxChoice::Clear()
8ee9d618 278{
92d2389e 279 Free();
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280
281 SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
71e57cd6 282
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283 if ( !IsFrozen() )
284 UpdateVisibleHeight();
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285
286 InvalidateBestSize();
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287}
288
289void wxChoice::Free()
2bda0e17 290{
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291 if ( HasClientObjectData() )
292 {
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293 unsigned int count = GetCount();
294 for ( unsigned int n = 0; n < count; n++ )
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295 {
296 delete GetClientObject(n);
297 }
298 }
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299}
300
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301// ----------------------------------------------------------------------------
302// selection
303// ----------------------------------------------------------------------------
2bda0e17 304
8d99be5f 305int wxChoice::GetSelection() const
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306{
307 // if m_lastAcceptedSelection is set, it means that the dropdown is
308 // currently shown and that we want to use the last "permanent" selection
309 // instead of whatever is under the mouse pointer currently
310 //
311 // otherwise, get the selection from the control
312 return m_lastAcceptedSelection == wxID_NONE ? GetCurrentSelection()
313 : m_lastAcceptedSelection;
314}
315
316int wxChoice::GetCurrentSelection() const
2bda0e17 317{
8d99be5f 318 return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0);
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319}
320
debe6624 321void wxChoice::SetSelection(int n)
2bda0e17 322{
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323 SendMessage(GetHwnd(), CB_SETCURSEL, n, 0);
324}
325
326// ----------------------------------------------------------------------------
327// string list functions
328// ----------------------------------------------------------------------------
329
aa61d352 330unsigned int wxChoice::GetCount() const
8d99be5f 331{
aa61d352 332 return (unsigned int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
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333}
334
11e62fe6 335int wxChoice::FindString(const wxString& s, bool bCase) const
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336{
337#if defined(__WATCOMC__) && defined(__WIN386__)
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338 // For some reason, Watcom in WIN386 mode crashes in the CB_FINDSTRINGEXACT message.
339 // wxChoice::Do it the long way instead.
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340 unsigned int count = GetCount();
341 for ( unsigned int i = 0; i < count; i++ )
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342 {
343 // as CB_FINDSTRINGEXACT is case insensitive, be case insensitive too
aa61d352 344 if (GetString(i).IsSameAs(s, bCase))
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345 return i;
346 }
347
348 return wxNOT_FOUND;
349#else // !Watcom
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350 //TODO: Evidently some MSW versions (all?) don't like empty strings
351 //passed to SendMessage, so we have to do it ourselves in that case
beedefb9 352 if ( s.empty() )
4cd1ed99 353 {
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354 unsigned int count = GetCount();
355 for ( unsigned int i = 0; i < count; i++ )
11e62fe6 356 {
aa61d352 357 if (GetString(i).empty())
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358 return i;
359 }
360
361 return wxNOT_FOUND;
362 }
363 else if (bCase)
364 {
365 // back to base class search for not native search type
366 return wxItemContainerImmutable::FindString( s, bCase );
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367 }
368 else
369 {
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370 int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
371 (WPARAM)-1, (LPARAM)s.c_str());
f31a4098 372
11e62fe6 373 return pos == LB_ERR ? wxNOT_FOUND : pos;
4cd1ed99 374 }
8d99be5f 375#endif // Watcom/!Watcom
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376}
377
aa61d352 378void wxChoice::SetString(unsigned int n, const wxString& s)
6c8a980f 379{
8228b893 380 wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::SetString") );
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381
382 // we have to delete and add back the string as there is no way to change a
383 // string in place
384
385 // we need to preserve the client data
386 void *data;
387 if ( m_clientDataItemsType != wxClientData_None )
388 {
389 data = DoGetItemClientData(n);
390 }
391 else // no client data
392 {
393 data = NULL;
394 }
395
396 ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
397 ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.c_str() );
398
399 if ( data )
400 {
401 DoSetItemClientData(n, data);
402 }
403 //else: it's already NULL by default
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404
405 InvalidateBestSize();
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406}
407
aa61d352 408wxString wxChoice::GetString(unsigned int n) const
2bda0e17 409{
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410 int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
411
6c8a980f 412 wxString str;
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413 if ( len != CB_ERR && len > 0 )
414 {
415 if ( ::SendMessage
416 (
417 GetHwnd(),
418 CB_GETLBTEXT,
419 n,
420 (LPARAM)(wxChar *)wxStringBuffer(str, len)
421 ) == CB_ERR )
422 {
f6bcfd97 423 wxLogLastError(wxT("SendMessage(CB_GETLBTEXT)"));
21d72d17 424 }
4438caf4 425 }
2bda0e17 426
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427 return str;
428}
2bda0e17 429
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430// ----------------------------------------------------------------------------
431// client data
432// ----------------------------------------------------------------------------
433
aa61d352 434void wxChoice::DoSetItemClientData(unsigned int n, void* clientData)
8d99be5f 435{
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436 if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA,
437 n, (LPARAM)clientData) == CB_ERR )
8d99be5f 438 {
223d09f6 439 wxLogLastError(wxT("CB_SETITEMDATA"));
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440 }
441}
442
aa61d352 443void* wxChoice::DoGetItemClientData(unsigned int n) const
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444{
445 LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);
446 if ( rc == CB_ERR )
447 {
223d09f6 448 wxLogLastError(wxT("CB_GETITEMDATA"));
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449
450 // unfortunately, there is no way to return an error code to the user
8ee9d618 451 rc = (LPARAM) NULL;
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452 }
453
454 return (void *)rc;
455}
456
aa61d352 457void wxChoice::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
8d99be5f 458{
6c8a980f 459 DoSetItemClientData(n, clientData);
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460}
461
aa61d352 462wxClientData* wxChoice::DoGetItemClientObject(unsigned int n) const
8d99be5f 463{
6c8a980f 464 return (wxClientData *)DoGetItemClientData(n);
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465}
466
467// ----------------------------------------------------------------------------
468// wxMSW specific helpers
469// ----------------------------------------------------------------------------
470
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471void wxChoice::UpdateVisibleHeight()
472{
e6968367 473 // be careful to not change the width here
02b7b6b0 474 DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y, wxSIZE_USE_EXISTING);
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475}
476
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477void wxChoice::DoMoveWindow(int x, int y, int width, int height)
478{
479 // here is why this is necessary: if the width is negative, the combobox
480 // window proc makes the window of the size width*height instead of
481 // interpreting height in the usual manner (meaning the height of the drop
482 // down list - usually the height specified in the call to MoveWindow()
483 // will not change the height of combo box per se)
484 //
485 // this behaviour is not documented anywhere, but this is just how it is
486 // here (NT 4.4) and, anyhow, the check shouldn't hurt - however without
487 // the check, constraints/sizers using combos may break the height
488 // constraint will have not at all the same value as expected
489 if ( width < 0 )
490 return;
491
492 wxControl::DoMoveWindow(x, y, width, height);
493}
494
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495void wxChoice::DoGetSize(int *w, int *h) const
496{
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497 // this is weird: sometimes, the height returned by Windows is clearly the
498 // total height of the control including the drop down list -- but only
499 // sometimes, and normally it isn't... I have no idea about what to do with
500 // this
02b7b6b0 501 wxControl::DoGetSize(w, h);
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502}
503
4438caf4 504void wxChoice::DoSetSize(int x, int y,
d99957b6 505 int width, int height,
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506 int sizeFlags)
507{
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508 // the height which we must pass to Windows should be the total height of
509 // the control including the drop down list while the height given to us
510 // is, of course, just the height of the permanently visible part of it
511 if ( height != wxDefaultCoord )
512 {
513 // don't make the drop down list too tall, arbitrarily limit it to 40
514 // items max and also don't leave it empty
515 size_t nItems = GetCount();
516 if ( !nItems )
517 nItems = 9;
518 else if ( nItems > 24 )
519 nItems = 24;
a8e65eee 520
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521 // add space for the drop down list
522 const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
523 height += hItem*(nItems + 1);
524 }
525 else
526 {
527 // We cannot pass wxDefaultCoord as height to wxControl. wxControl uses
528 // wxGetWindowRect() to determine the current height of the combobox,
529 // and then again sets the combobox's height to that value. Unfortunately,
530 // wxGetWindowRect doesn't include the dropdown list's height (at least
531 // on Win2K), so this would result in a combobox with dropdown height of
532 // 1 pixel. We have to determine the default height ourselves and call
533 // wxControl with that value instead.
534 int w, h;
535 RECT r;
536 DoGetSize(&w, &h);
537 if (::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) != 0)
538 {
539 height = h + r.bottom - r.top;
540 }
541 }
542
543 wxControl::DoSetSize(x, y, width, height, sizeFlags);
544
545 // This solution works on XP, but causes choice/combobox lists to be
546 // too short on W2K and earlier.
547#if 0
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548 int widthCurrent, heightCurrent;
549 DoGetSize(&widthCurrent, &heightCurrent);
550
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551 // the height which we must pass to Windows should be the total height of
552 // the control including the drop down list while the height given to us
553 // is, of course, just the height of the permanently visible part of it
e3e78de1 554 if ( height != wxDefaultCoord && height != heightCurrent )
d99957b6 555 {
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556 // don't make the drop down list too tall, arbitrarily limit it to 40
557 // items max and also don't leave it empty
aa61d352 558 unsigned int nItems = GetCount();
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559 if ( !nItems )
560 nItems = 9;
561 else if ( nItems > 24 )
562 nItems = 24;
563
564 // add space for the drop down list
565 const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
566 height += hItem*(nItems + 1);
d99957b6 567 }
e3e78de1 568 else // keep the same height as now
d6959d6f 569 {
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570 // normally wxWindow::DoSetSize() checks if we set the same size as the
571 // window already has and does nothing in this case, but for us the
572 // check fails as the size we pass to it includes the dropdown while
573 // the size returned by our GetSize() does not, so test if the size
574 // didn't really change ourselves here
575 if ( width == wxDefaultCoord || width == widthCurrent )
576 {
577 // size doesn't change, what about position?
578 int xCurrent, yCurrent;
579 DoGetPosition(&xCurrent, &yCurrent);
580 const bool defMeansUnchanged = !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE);
581 if ( ((x == wxDefaultCoord && defMeansUnchanged) || x == xCurrent)
582 &&
583 ((y == wxDefaultCoord && defMeansUnchanged) || y == yCurrent) )
584 {
585 // nothing changes, nothing to do
586 return;
587 }
588 }
589
d6959d6f 590 // We cannot pass wxDefaultCoord as height to wxControl. wxControl uses
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591 // wxGetWindowRect() to determine the current height of the combobox,
592 // and then again sets the combobox's height to that value. Unfortunately,
593 // wxGetWindowRect doesn't include the dropdown list's height (at least
594 // on Win2K), so this would result in a combobox with dropdown height of
d6959d6f
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595 // 1 pixel. We have to determine the default height ourselves and call
596 // wxControl with that value instead.
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597 //
598 // Also notice that sometimes CB_GETDROPPEDCONTROLRECT seems to return
599 // wildly incorrect values (~32000) which looks like a bug in it, just
600 // ignore them in this case
d6959d6f 601 RECT r;
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602 if ( ::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r)
603 && r.bottom < 30000 )
d6959d6f 604 {
e3e78de1 605 height = heightCurrent + r.bottom - r.top;
d6959d6f
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606 }
607 }
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608
609 wxControl::DoSetSize(x, y, width, height, sizeFlags);
ef036883 610#endif
4438caf4 611}
2bda0e17 612
882a8f40 613wxSize wxChoice::DoGetBestSize() const
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614{
615 // find the widest string
4438caf4 616 int wChoice = 0;
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617 const unsigned int nItems = GetCount();
618 for ( unsigned int i = 0; i < nItems; i++ )
2bda0e17 619 {
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620 int wLine;
621 GetTextExtent(GetString(i), &wLine, NULL);
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622 if ( wLine > wChoice )
623 wChoice = wLine;
2bda0e17 624 }
fd3f686c 625
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626 // give it some reasonable default value if there are no strings in the
627 // list
628 if ( wChoice == 0 )
629 wChoice = 100;
2bda0e17 630
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631 // the combobox should be slightly larger than the widest string
632 wChoice += 5*GetCharWidth();
2bda0e17 633
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634 wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
635 CacheBestSize(best);
636 return best;
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637}
638
c140b7e7 639WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
2bda0e17 640{
f499e614 641 switch ( nMsg )
2bda0e17 642 {
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643 case WM_LBUTTONUP:
644 {
645 int x = (int)LOWORD(lParam);
646 int y = (int)HIWORD(lParam);
647
648 // Ok, this is truly weird, but if a panel with a wxChoice
649 // loses the focus, then you get a *fake* WM_LBUTTONUP message
650 // with x = 65535 and y = 65535. Filter out this nonsense.
651 //
652 // VZ: I'd like to know how to reproduce this please...
653 if ( x == 65535 && y == 65535 )
654 return 0;
655 }
656 break;
657
658 // we have to handle both: one for the normal case and the other
659 // for readonly
660 case WM_CTLCOLOREDIT:
661 case WM_CTLCOLORLISTBOX:
662 case WM_CTLCOLORSTATIC:
663 {
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664 WXHDC hdc;
665 WXHWND hwnd;
9f368d0d 666 UnpackCtlColor(wParam, lParam, &hdc, &hwnd);
f499e614 667
2bae4332 668 WXHBRUSH hbr = MSWControlColor((WXHDC)hdc, hwnd);
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669 if ( hbr )
670 return (WXLRESULT)hbr;
671 //else: fall through to default window proc
f499e614 672 }
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673 }
674
8d99be5f 675 return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
2bda0e17
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676}
677
8d99be5f 678bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
2bda0e17 679{
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680 /*
681 The native control provides a great variety in the events it sends in
682 the different selection scenarios (undoubtedly for greater amusement of
683 the programmers using it). For the reference, here are the cases when
684 the final selection is accepted (things are quite interesting when it
685 is cancelled too):
686
687 A. Selecting with just the arrows without opening the dropdown:
688 1. CBN_SELENDOK
689 2. CBN_SELCHANGE
690
691 B. Opening dropdown with F4 and selecting with arrows:
692 1. CBN_DROPDOWN
693 2. many CBN_SELCHANGE while changing selection in the list
694 3. CBN_SELENDOK
695 4. CBN_CLOSEUP
696
697 C. Selecting with the mouse:
698 1. CBN_DROPDOWN
699 -- no intermediate CBN_SELCHANGEs --
700 2. CBN_SELENDOK
701 3. CBN_CLOSEUP
702 4. CBN_SELCHANGE
703
704 Admire the different order of messages in all of those cases, it must
705 surely have taken a lot of effort to Microsoft developers to achieve
706 such originality.
707 */
6ba93d23 708 switch ( param )
2bda0e17 709 {
6ba93d23 710 case CBN_DROPDOWN:
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711 // we use this value both because we don't want to track selection
712 // using CB_GETCURSEL while the dropdown is opened and because we
713 // need to reset the selection back to it if it's eventually
714 // cancelled by user
6ba93d23
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715 m_lastAcceptedSelection = GetCurrentSelection();
716 break;
2bda0e17 717
6ba93d23 718 case CBN_CLOSEUP:
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719 // if the selection was accepted by the user, it should have been
720 // reset to wxID_NONE by CBN_SELENDOK, otherwise the selection was
721 // cancelled and we must restore the old one
722 if ( m_lastAcceptedSelection != wxID_NONE )
723 {
724 SetSelection(m_lastAcceptedSelection);
725 m_lastAcceptedSelection = wxID_NONE;
726 }
6ba93d23
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727 break;
728
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729 case CBN_SELENDOK:
730 // reset it to prevent CBN_CLOSEUP from undoing the selection (it's
731 // ok to reset it now as GetCurrentSelection() will now return the
732 // same thing anyhow)
733 m_lastAcceptedSelection = wxID_NONE;
734
6ba93d23
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735 {
736 const int n = GetSelection();
737
738 wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
739 event.SetInt(n);
740 event.SetEventObject(this);
741
742 if ( n > -1 )
743 {
744 event.SetString(GetStringSelection());
593ac33e 745 InitCommandEventWithItems(event, n);
6ba93d23
VZ
746 }
747
748 ProcessCommand(event);
749 }
c11f0412
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750 break;
751
752 // don't handle CBN_SELENDCANCEL: just leave m_lastAcceptedSelection
753 // valid and the selection will be undone in CBN_CLOSEUP above
754
755 // don't handle CBN_SELCHANGE neither, we don't want to generate events
756 // while the dropdown is opened -- but do add it if we ever need this
757
758 default:
759 return false;
8c1c5302 760 }
2bda0e17 761
c11f0412 762 return true;
8d99be5f 763}
2bda0e17 764
2bae4332 765WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
f6bcfd97 766{
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VZ
767 if ( !IsEnabled() )
768 return MSWControlColorDisabled(hDC);
f6bcfd97 769
2bae4332 770 return wxChoiceBase::MSWControlColor(hDC, hWnd);
f6bcfd97
BP
771}
772
3180bc0e 773#endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__)