| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/msw/choice.cpp |
| 3 | // Purpose: wxChoice |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: Vadim Zeitlin to derive from wxChoiceBase |
| 6 | // Created: 04/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #ifdef __BORLANDC__ |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__)) |
| 28 | |
| 29 | #include "wx/choice.h" |
| 30 | |
| 31 | #ifndef WX_PRECOMP |
| 32 | #include "wx/utils.h" |
| 33 | #include "wx/log.h" |
| 34 | #include "wx/brush.h" |
| 35 | #include "wx/settings.h" |
| 36 | #endif |
| 37 | |
| 38 | #include "wx/msw/private.h" |
| 39 | |
| 40 | #if wxUSE_EXTENDED_RTTI |
| 41 | WX_DEFINE_FLAGS( wxChoiceStyle ) |
| 42 | |
| 43 | wxBEGIN_FLAGS( wxChoiceStyle ) |
| 44 | // new style border flags, we put them first to |
| 45 | // use them for streaming out |
| 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) |
| 52 | |
| 53 | // old style border flags |
| 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) |
| 59 | wxFLAGS_MEMBER(wxBORDER) |
| 60 | |
| 61 | // standard window styles |
| 62 | wxFLAGS_MEMBER(wxTAB_TRAVERSAL) |
| 63 | wxFLAGS_MEMBER(wxCLIP_CHILDREN) |
| 64 | wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW) |
| 65 | wxFLAGS_MEMBER(wxWANTS_CHARS) |
| 66 | wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE) |
| 67 | wxFLAGS_MEMBER(wxALWAYS_SHOW_SB ) |
| 68 | wxFLAGS_MEMBER(wxVSCROLL) |
| 69 | wxFLAGS_MEMBER(wxHSCROLL) |
| 70 | |
| 71 | wxEND_FLAGS( wxChoiceStyle ) |
| 72 | |
| 73 | IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControlWithItems,"wx/choice.h") |
| 74 | |
| 75 | wxBEGIN_PROPERTIES_TABLE(wxChoice) |
| 76 | wxEVENT_PROPERTY( Select , wxEVT_COMMAND_CHOICE_SELECTED , wxCommandEvent ) |
| 77 | |
| 78 | wxPROPERTY( Font , wxFont , SetFont , GetFont , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) |
| 79 | wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) |
| 80 | wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) |
| 81 | wxPROPERTY_FLAGS( WindowStyle , wxChoiceStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style |
| 82 | wxEND_PROPERTIES_TABLE() |
| 83 | |
| 84 | wxBEGIN_HANDLERS_TABLE(wxChoice) |
| 85 | wxEND_HANDLERS_TABLE() |
| 86 | |
| 87 | wxCONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size ) |
| 88 | #else |
| 89 | IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControlWithItems) |
| 90 | #endif |
| 91 | /* |
| 92 | TODO PROPERTIES |
| 93 | selection (long) |
| 94 | content (list) |
| 95 | item |
| 96 | */ |
| 97 | |
| 98 | // ============================================================================ |
| 99 | // implementation |
| 100 | // ============================================================================ |
| 101 | |
| 102 | // ---------------------------------------------------------------------------- |
| 103 | // creation |
| 104 | // ---------------------------------------------------------------------------- |
| 105 | |
| 106 | bool 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) |
| 114 | { |
| 115 | // Experience shows that wxChoice vs. wxComboBox distinction confuses |
| 116 | // quite a few people - try to help them |
| 117 | wxASSERT_MSG( !(style & wxCB_DROPDOWN) && |
| 118 | !(style & wxCB_READONLY) && |
| 119 | !(style & wxCB_SIMPLE), |
| 120 | wxT("this style flag is ignored by wxChoice, you ") |
| 121 | wxT("probably want to use a wxComboBox") ); |
| 122 | |
| 123 | return CreateAndInit(parent, id, pos, size, n, choices, style, |
| 124 | validator, name); |
| 125 | } |
| 126 | |
| 127 | bool wxChoice::CreateAndInit(wxWindow *parent, |
| 128 | wxWindowID id, |
| 129 | const wxPoint& pos, |
| 130 | const wxSize& size, |
| 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) ) |
| 138 | return false; |
| 139 | |
| 140 | // now create the real HWND |
| 141 | if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) ) |
| 142 | return false; |
| 143 | |
| 144 | |
| 145 | // choice/combobox normally has "white" (depends on colour scheme, of |
| 146 | // course) background rather than inheriting the parent's background |
| 147 | SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)); |
| 148 | |
| 149 | // initialize the controls contents |
| 150 | for ( int i = 0; i < n; i++ ) |
| 151 | { |
| 152 | Append(choices[i]); |
| 153 | } |
| 154 | |
| 155 | // and now we may finally size the control properly (if needed) |
| 156 | SetInitialSize(size); |
| 157 | |
| 158 | return true; |
| 159 | } |
| 160 | |
| 161 | void wxChoice::SetLabel(const wxString& label) |
| 162 | { |
| 163 | if ( FindString(label) == wxNOT_FOUND ) |
| 164 | { |
| 165 | // unless we explicitly do this here, CB_GETCURSEL will continue to |
| 166 | // return the index of the previously selected item which will result |
| 167 | // in wrongly replacing the value being set now with the previously |
| 168 | // value if the user simply opens and closes (without selecting |
| 169 | // anything) the combobox popup |
| 170 | SetSelection(-1); |
| 171 | } |
| 172 | |
| 173 | wxChoiceBase::SetLabel(label); |
| 174 | } |
| 175 | |
| 176 | bool wxChoice::Create(wxWindow *parent, |
| 177 | wxWindowID id, |
| 178 | const wxPoint& pos, |
| 179 | const wxSize& size, |
| 180 | const wxArrayString& choices, |
| 181 | long style, |
| 182 | const wxValidator& validator, |
| 183 | const wxString& name) |
| 184 | { |
| 185 | wxCArrayString chs(choices); |
| 186 | return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(), |
| 187 | style, validator, name); |
| 188 | } |
| 189 | |
| 190 | bool wxChoice::MSWShouldPreProcessMessage(WXMSG *pMsg) |
| 191 | { |
| 192 | MSG *msg = (MSG *) pMsg; |
| 193 | |
| 194 | // if the dropdown list is visible, don't preprocess certain keys |
| 195 | if ( msg->message == WM_KEYDOWN |
| 196 | && (msg->wParam == VK_ESCAPE || msg->wParam == VK_RETURN) ) |
| 197 | { |
| 198 | if (::SendMessage(GetHwndOf(this), CB_GETDROPPEDSTATE, 0, 0)) |
| 199 | { |
| 200 | return false; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | return wxControl::MSWShouldPreProcessMessage(pMsg); |
| 205 | } |
| 206 | |
| 207 | WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const |
| 208 | { |
| 209 | // we never have an external border |
| 210 | WXDWORD msStyle = wxControl::MSWGetStyle |
| 211 | ( |
| 212 | (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle |
| 213 | ); |
| 214 | |
| 215 | // WS_CLIPSIBLINGS is useful with wxChoice and doesn't seem to result in |
| 216 | // any problems |
| 217 | msStyle |= WS_CLIPSIBLINGS; |
| 218 | |
| 219 | // wxChoice-specific styles |
| 220 | msStyle |= CBS_DROPDOWNLIST | WS_HSCROLL | WS_VSCROLL; |
| 221 | if ( style & wxCB_SORT ) |
| 222 | msStyle |= CBS_SORT; |
| 223 | |
| 224 | return msStyle; |
| 225 | } |
| 226 | |
| 227 | wxChoice::~wxChoice() |
| 228 | { |
| 229 | Clear(); |
| 230 | } |
| 231 | |
| 232 | // ---------------------------------------------------------------------------- |
| 233 | // adding/deleting items to/from the list |
| 234 | // ---------------------------------------------------------------------------- |
| 235 | |
| 236 | int wxChoice::DoInsertItems(const wxArrayStringsAdapter& items, |
| 237 | unsigned int pos, |
| 238 | void **clientData, wxClientDataType type) |
| 239 | { |
| 240 | MSWAllocStorage(items, CB_INITSTORAGE); |
| 241 | |
| 242 | const bool append = pos == GetCount(); |
| 243 | |
| 244 | // use CB_ADDSTRING when appending at the end to make sure the control is |
| 245 | // resorted if it has wxCB_SORT style |
| 246 | const unsigned msg = append ? CB_ADDSTRING : CB_INSERTSTRING; |
| 247 | |
| 248 | if ( append ) |
| 249 | pos = 0; |
| 250 | |
| 251 | int n = wxNOT_FOUND; |
| 252 | const unsigned numItems = items.GetCount(); |
| 253 | for ( unsigned i = 0; i < numItems; ++i ) |
| 254 | { |
| 255 | n = MSWInsertOrAppendItem(pos, items[i], msg); |
| 256 | if ( n == wxNOT_FOUND ) |
| 257 | return n; |
| 258 | |
| 259 | if ( !append ) |
| 260 | pos++; |
| 261 | |
| 262 | AssignNewItemClientData(n, clientData, i, type); |
| 263 | } |
| 264 | |
| 265 | // we need to refresh our size in order to have enough space for the |
| 266 | // newly added items |
| 267 | if ( !IsFrozen() ) |
| 268 | MSWUpdateDropDownHeight(); |
| 269 | |
| 270 | InvalidateBestSize(); |
| 271 | |
| 272 | return n; |
| 273 | } |
| 274 | |
| 275 | void wxChoice::DoDeleteOneItem(unsigned int n) |
| 276 | { |
| 277 | wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") ); |
| 278 | |
| 279 | SendMessage(GetHwnd(), CB_DELETESTRING, n, 0); |
| 280 | |
| 281 | if ( !IsFrozen() ) |
| 282 | MSWUpdateDropDownHeight(); |
| 283 | |
| 284 | InvalidateBestSize(); |
| 285 | } |
| 286 | |
| 287 | void wxChoice::DoClear() |
| 288 | { |
| 289 | SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0); |
| 290 | |
| 291 | if ( !IsFrozen() ) |
| 292 | MSWUpdateDropDownHeight(); |
| 293 | |
| 294 | InvalidateBestSize(); |
| 295 | } |
| 296 | |
| 297 | // ---------------------------------------------------------------------------- |
| 298 | // selection |
| 299 | // ---------------------------------------------------------------------------- |
| 300 | |
| 301 | int wxChoice::GetSelection() const |
| 302 | { |
| 303 | // if m_lastAcceptedSelection is set, it means that the dropdown is |
| 304 | // currently shown and that we want to use the last "permanent" selection |
| 305 | // instead of whatever is under the mouse pointer currently |
| 306 | // |
| 307 | // otherwise, get the selection from the control |
| 308 | return m_lastAcceptedSelection == wxID_NONE ? GetCurrentSelection() |
| 309 | : m_lastAcceptedSelection; |
| 310 | } |
| 311 | |
| 312 | int wxChoice::GetCurrentSelection() const |
| 313 | { |
| 314 | return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0); |
| 315 | } |
| 316 | |
| 317 | void wxChoice::SetSelection(int n) |
| 318 | { |
| 319 | SendMessage(GetHwnd(), CB_SETCURSEL, n, 0); |
| 320 | } |
| 321 | |
| 322 | // ---------------------------------------------------------------------------- |
| 323 | // string list functions |
| 324 | // ---------------------------------------------------------------------------- |
| 325 | |
| 326 | unsigned int wxChoice::GetCount() const |
| 327 | { |
| 328 | return (unsigned int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0); |
| 329 | } |
| 330 | |
| 331 | int wxChoice::FindString(const wxString& s, bool bCase) const |
| 332 | { |
| 333 | #if defined(__WATCOMC__) && defined(__WIN386__) |
| 334 | // For some reason, Watcom in WIN386 mode crashes in the CB_FINDSTRINGEXACT message. |
| 335 | // wxChoice::Do it the long way instead. |
| 336 | unsigned int count = GetCount(); |
| 337 | for ( unsigned int i = 0; i < count; i++ ) |
| 338 | { |
| 339 | // as CB_FINDSTRINGEXACT is case insensitive, be case insensitive too |
| 340 | if (GetString(i).IsSameAs(s, bCase)) |
| 341 | return i; |
| 342 | } |
| 343 | |
| 344 | return wxNOT_FOUND; |
| 345 | #else // !Watcom |
| 346 | //TODO: Evidently some MSW versions (all?) don't like empty strings |
| 347 | //passed to SendMessage, so we have to do it ourselves in that case |
| 348 | if ( s.empty() ) |
| 349 | { |
| 350 | unsigned int count = GetCount(); |
| 351 | for ( unsigned int i = 0; i < count; i++ ) |
| 352 | { |
| 353 | if (GetString(i).empty()) |
| 354 | return i; |
| 355 | } |
| 356 | |
| 357 | return wxNOT_FOUND; |
| 358 | } |
| 359 | else if (bCase) |
| 360 | { |
| 361 | // back to base class search for not native search type |
| 362 | return wxItemContainerImmutable::FindString( s, bCase ); |
| 363 | } |
| 364 | else |
| 365 | { |
| 366 | int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT, |
| 367 | (WPARAM)-1, (LPARAM)s.wx_str()); |
| 368 | |
| 369 | return pos == LB_ERR ? wxNOT_FOUND : pos; |
| 370 | } |
| 371 | #endif // Watcom/!Watcom |
| 372 | } |
| 373 | |
| 374 | void wxChoice::SetString(unsigned int n, const wxString& s) |
| 375 | { |
| 376 | wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::SetString") ); |
| 377 | |
| 378 | // we have to delete and add back the string as there is no way to change a |
| 379 | // string in place |
| 380 | |
| 381 | // we need to preserve the client data manually |
| 382 | void *oldData = NULL; |
| 383 | wxClientData *oldObjData = NULL; |
| 384 | if ( HasClientUntypedData() ) |
| 385 | oldData = GetClientData(n); |
| 386 | else if ( HasClientObjectData() ) |
| 387 | oldObjData = GetClientObject(n); |
| 388 | |
| 389 | ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0); |
| 390 | ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.wx_str() ); |
| 391 | |
| 392 | // restore the client data |
| 393 | if ( oldData ) |
| 394 | SetClientData(n, oldData); |
| 395 | else if ( oldObjData ) |
| 396 | SetClientObject(n, oldObjData); |
| 397 | |
| 398 | InvalidateBestSize(); |
| 399 | } |
| 400 | |
| 401 | wxString wxChoice::GetString(unsigned int n) const |
| 402 | { |
| 403 | int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0); |
| 404 | |
| 405 | wxString str; |
| 406 | if ( len != CB_ERR && len > 0 ) |
| 407 | { |
| 408 | if ( ::SendMessage |
| 409 | ( |
| 410 | GetHwnd(), |
| 411 | CB_GETLBTEXT, |
| 412 | n, |
| 413 | (LPARAM)(wxChar *)wxStringBuffer(str, len) |
| 414 | ) == CB_ERR ) |
| 415 | { |
| 416 | wxLogLastError(wxT("SendMessage(CB_GETLBTEXT)")); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | return str; |
| 421 | } |
| 422 | |
| 423 | // ---------------------------------------------------------------------------- |
| 424 | // client data |
| 425 | // ---------------------------------------------------------------------------- |
| 426 | |
| 427 | void wxChoice::DoSetItemClientData(unsigned int n, void* clientData) |
| 428 | { |
| 429 | if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA, |
| 430 | n, (LPARAM)clientData) == CB_ERR ) |
| 431 | { |
| 432 | wxLogLastError(wxT("CB_SETITEMDATA")); |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | void* wxChoice::DoGetItemClientData(unsigned int n) const |
| 437 | { |
| 438 | LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0); |
| 439 | if ( rc == CB_ERR ) |
| 440 | { |
| 441 | wxLogLastError(wxT("CB_GETITEMDATA")); |
| 442 | |
| 443 | // unfortunately, there is no way to return an error code to the user |
| 444 | rc = (LPARAM) NULL; |
| 445 | } |
| 446 | |
| 447 | return (void *)rc; |
| 448 | } |
| 449 | |
| 450 | // ---------------------------------------------------------------------------- |
| 451 | // wxMSW-specific geometry management |
| 452 | // ---------------------------------------------------------------------------- |
| 453 | |
| 454 | namespace |
| 455 | { |
| 456 | |
| 457 | // there is a difference between the height passed to CB_SETITEMHEIGHT and the |
| 458 | // real height of the combobox; it is probably not constant for all Windows |
| 459 | // versions/settings but right now I don't know how to find what it is so it is |
| 460 | // temporarily hardcoded to its value under XP systems with normal fonts sizes |
| 461 | const int COMBO_HEIGHT_ADJ = 6; |
| 462 | |
| 463 | } // anonymous namespace |
| 464 | |
| 465 | void wxChoice::MSWUpdateVisibleHeight() |
| 466 | { |
| 467 | if ( m_heightOwn != wxDefaultCoord ) |
| 468 | { |
| 469 | ::SendMessage(GetHwnd(), CB_SETITEMHEIGHT, |
| 470 | (WPARAM)-1, m_heightOwn - COMBO_HEIGHT_ADJ); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | #if wxUSE_DEFERRED_SIZING |
| 475 | void wxChoice::MSWEndDeferWindowPos() |
| 476 | { |
| 477 | // we can only set the height of the choice itself now as it is reset to |
| 478 | // default every time the control is resized |
| 479 | MSWUpdateVisibleHeight(); |
| 480 | |
| 481 | wxChoiceBase::MSWEndDeferWindowPos(); |
| 482 | } |
| 483 | #endif // wxUSE_DEFERRED_SIZING |
| 484 | |
| 485 | void wxChoice::MSWUpdateDropDownHeight() |
| 486 | { |
| 487 | // be careful to not change the width here |
| 488 | DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y, |
| 489 | wxSIZE_USE_EXISTING); |
| 490 | } |
| 491 | |
| 492 | void wxChoice::DoMoveWindow(int x, int y, int width, int height) |
| 493 | { |
| 494 | // here is why this is necessary: if the width is negative, the combobox |
| 495 | // window proc makes the window of the size width*height instead of |
| 496 | // interpreting height in the usual manner (meaning the height of the drop |
| 497 | // down list - usually the height specified in the call to MoveWindow() |
| 498 | // will not change the height of combo box per se) |
| 499 | // |
| 500 | // this behaviour is not documented anywhere, but this is just how it is |
| 501 | // here (NT 4.4) and, anyhow, the check shouldn't hurt - however without |
| 502 | // the check, constraints/sizers using combos may break the height |
| 503 | // constraint will have not at all the same value as expected |
| 504 | if ( width < 0 ) |
| 505 | return; |
| 506 | |
| 507 | wxControl::DoMoveWindow(x, y, width, height); |
| 508 | } |
| 509 | |
| 510 | void wxChoice::DoGetSize(int *w, int *h) const |
| 511 | { |
| 512 | wxControl::DoGetSize(w, h); |
| 513 | |
| 514 | // this is weird: sometimes, the height returned by Windows is clearly the |
| 515 | // total height of the control including the drop down list -- but only |
| 516 | // sometimes, and sometimes it isn't so work around this here by using our |
| 517 | // own stored value if we have it |
| 518 | if ( h && m_heightOwn != wxDefaultCoord ) |
| 519 | *h = m_heightOwn; |
| 520 | } |
| 521 | |
| 522 | void wxChoice::DoSetSize(int x, int y, |
| 523 | int width, int height, |
| 524 | int sizeFlags) |
| 525 | { |
| 526 | // we need the real height below so get the current one if it's not given |
| 527 | if ( height != wxDefaultCoord && height != GetBestSize().y ) |
| 528 | { |
| 529 | // set our new own height but be careful not to make it too big: the |
| 530 | // native control apparently stores it as a single byte and so setting |
| 531 | // own height to 256 pixels results in default height being used (255 |
| 532 | // is still ok) |
| 533 | m_heightOwn = height; |
| 534 | |
| 535 | if ( m_heightOwn > UCHAR_MAX ) |
| 536 | m_heightOwn = UCHAR_MAX; |
| 537 | // nor too small: see MSWUpdateVisibleHeight() |
| 538 | else if ( m_heightOwn < COMBO_HEIGHT_ADJ ) |
| 539 | m_heightOwn = COMBO_HEIGHT_ADJ; |
| 540 | } |
| 541 | else // height not specified |
| 542 | { |
| 543 | DoGetSize(NULL, &height); |
| 544 | } |
| 545 | |
| 546 | |
| 547 | // the height which we must pass to Windows should be the total height of |
| 548 | // the control including the drop down list while the height given to us |
| 549 | // is, of course, just the height of the permanently visible part of it so |
| 550 | // add the drop down height to it |
| 551 | |
| 552 | // don't make the drop down list too tall, arbitrarily limit it to 30 |
| 553 | // items max and also don't make it too small if it's currently empty |
| 554 | size_t nItems = GetCount(); |
| 555 | if (!HasFlag(wxCB_SIMPLE)) |
| 556 | { |
| 557 | if ( !nItems ) |
| 558 | nItems = 9; |
| 559 | else if ( nItems > 30 ) |
| 560 | nItems = 30; |
| 561 | } |
| 562 | |
| 563 | const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0); |
| 564 | int heightWithItems = 0; |
| 565 | if (!HasFlag(wxCB_SIMPLE)) |
| 566 | heightWithItems = height + hItem*nItems; |
| 567 | else |
| 568 | heightWithItems = SetHeightSimpleComboBox(nItems); |
| 569 | |
| 570 | |
| 571 | // do resize the native control |
| 572 | wxControl::DoSetSize(x, y, width, heightWithItems, sizeFlags); |
| 573 | |
| 574 | |
| 575 | // make the control itself of the requested height: notice that this |
| 576 | // must be done after changing its size or it has no effect (apparently |
| 577 | // the height is reset to default during the control layout) and that it's |
| 578 | // useless to to do it when using the deferred sizing -- in this case it |
| 579 | // will be done from MSWEndDeferWindowPos() |
| 580 | #if wxUSE_DEFERRED_SIZING |
| 581 | if ( m_pendingSize == wxDefaultSize ) |
| 582 | { |
| 583 | // not using deferred sizing, update it immediately |
| 584 | MSWUpdateVisibleHeight(); |
| 585 | } |
| 586 | else // in the middle of deferred sizing |
| 587 | { |
| 588 | // we need to report the size of the visible part of the control back |
| 589 | // in GetSize() and not height stored by DoSetSize() in m_pendingSize |
| 590 | m_pendingSize = wxSize(width, height); |
| 591 | } |
| 592 | #else // !wxUSE_DEFERRED_SIZING |
| 593 | // always update the visible height immediately |
| 594 | MSWUpdateVisibleHeight(); |
| 595 | #endif // wxUSE_DEFERRED_SIZING |
| 596 | } |
| 597 | |
| 598 | wxSize wxChoice::DoGetBestSize() const |
| 599 | { |
| 600 | // find the widest string |
| 601 | int wChoice = 0; |
| 602 | int hChoice; |
| 603 | const unsigned int nItems = GetCount(); |
| 604 | for ( unsigned int i = 0; i < nItems; i++ ) |
| 605 | { |
| 606 | int wLine; |
| 607 | GetTextExtent(GetString(i), &wLine, NULL); |
| 608 | if ( wLine > wChoice ) |
| 609 | wChoice = wLine; |
| 610 | } |
| 611 | |
| 612 | // give it some reasonable default value if there are no strings in the |
| 613 | // list |
| 614 | if ( wChoice == 0 ) |
| 615 | wChoice = 100; |
| 616 | |
| 617 | // the combobox should be slightly larger than the widest string |
| 618 | wChoice += 5*GetCharWidth(); |
| 619 | if( HasFlag( wxCB_SIMPLE ) ) |
| 620 | { |
| 621 | hChoice = SetHeightSimpleComboBox( nItems ); |
| 622 | } |
| 623 | else |
| 624 | hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()); |
| 625 | |
| 626 | wxSize best(wChoice, hChoice); |
| 627 | CacheBestSize(best); |
| 628 | return best; |
| 629 | } |
| 630 | |
| 631 | int wxChoice::SetHeightSimpleComboBox(int nItems) const |
| 632 | { |
| 633 | int cx, cy; |
| 634 | wxGetCharSize( GetHWND(), &cx, &cy, GetFont() ); |
| 635 | int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0); |
| 636 | return EDIT_HEIGHT_FROM_CHAR_HEIGHT( cy ) * wxMin( wxMax( nItems, 3 ), 6 ) + hItem - 1; |
| 637 | } |
| 638 | |
| 639 | // ---------------------------------------------------------------------------- |
| 640 | // MSW message handlers |
| 641 | // ---------------------------------------------------------------------------- |
| 642 | |
| 643 | WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) |
| 644 | { |
| 645 | switch ( nMsg ) |
| 646 | { |
| 647 | case WM_LBUTTONUP: |
| 648 | { |
| 649 | int x = (int)LOWORD(lParam); |
| 650 | int y = (int)HIWORD(lParam); |
| 651 | |
| 652 | // Ok, this is truly weird, but if a panel with a wxChoice |
| 653 | // loses the focus, then you get a *fake* WM_LBUTTONUP message |
| 654 | // with x = 65535 and y = 65535. Filter out this nonsense. |
| 655 | // |
| 656 | // VZ: I'd like to know how to reproduce this please... |
| 657 | if ( x == 65535 && y == 65535 ) |
| 658 | return 0; |
| 659 | } |
| 660 | break; |
| 661 | |
| 662 | // we have to handle both: one for the normal case and the other |
| 663 | // for readonly |
| 664 | case WM_CTLCOLOREDIT: |
| 665 | case WM_CTLCOLORLISTBOX: |
| 666 | case WM_CTLCOLORSTATIC: |
| 667 | { |
| 668 | WXHDC hdc; |
| 669 | WXHWND hwnd; |
| 670 | UnpackCtlColor(wParam, lParam, &hdc, &hwnd); |
| 671 | |
| 672 | WXHBRUSH hbr = MSWControlColor((WXHDC)hdc, hwnd); |
| 673 | if ( hbr ) |
| 674 | return (WXLRESULT)hbr; |
| 675 | //else: fall through to default window proc |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | return wxWindow::MSWWindowProc(nMsg, wParam, lParam); |
| 680 | } |
| 681 | |
| 682 | bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) |
| 683 | { |
| 684 | /* |
| 685 | The native control provides a great variety in the events it sends in |
| 686 | the different selection scenarios (undoubtedly for greater amusement of |
| 687 | the programmers using it). For the reference, here are the cases when |
| 688 | the final selection is accepted (things are quite interesting when it |
| 689 | is cancelled too): |
| 690 | |
| 691 | A. Selecting with just the arrows without opening the dropdown: |
| 692 | 1. CBN_SELENDOK |
| 693 | 2. CBN_SELCHANGE |
| 694 | |
| 695 | B. Opening dropdown with F4 and selecting with arrows: |
| 696 | 1. CBN_DROPDOWN |
| 697 | 2. many CBN_SELCHANGE while changing selection in the list |
| 698 | 3. CBN_SELENDOK |
| 699 | 4. CBN_CLOSEUP |
| 700 | |
| 701 | C. Selecting with the mouse: |
| 702 | 1. CBN_DROPDOWN |
| 703 | -- no intermediate CBN_SELCHANGEs -- |
| 704 | 2. CBN_SELENDOK |
| 705 | 3. CBN_CLOSEUP |
| 706 | 4. CBN_SELCHANGE |
| 707 | |
| 708 | Admire the different order of messages in all of those cases, it must |
| 709 | surely have taken a lot of effort to Microsoft developers to achieve |
| 710 | such originality. |
| 711 | */ |
| 712 | switch ( param ) |
| 713 | { |
| 714 | case CBN_DROPDOWN: |
| 715 | // we use this value both because we don't want to track selection |
| 716 | // using CB_GETCURSEL while the dropdown is opened and because we |
| 717 | // need to reset the selection back to it if it's eventually |
| 718 | // cancelled by user |
| 719 | m_lastAcceptedSelection = GetCurrentSelection(); |
| 720 | break; |
| 721 | |
| 722 | case CBN_CLOSEUP: |
| 723 | // if the selection was accepted by the user, it should have been |
| 724 | // reset to wxID_NONE by CBN_SELENDOK, otherwise the selection was |
| 725 | // cancelled and we must restore the old one |
| 726 | if ( m_lastAcceptedSelection != wxID_NONE ) |
| 727 | { |
| 728 | SetSelection(m_lastAcceptedSelection); |
| 729 | m_lastAcceptedSelection = wxID_NONE; |
| 730 | } |
| 731 | break; |
| 732 | |
| 733 | case CBN_SELENDOK: |
| 734 | // reset it to prevent CBN_CLOSEUP from undoing the selection (it's |
| 735 | // ok to reset it now as GetCurrentSelection() will now return the |
| 736 | // same thing anyhow) |
| 737 | m_lastAcceptedSelection = wxID_NONE; |
| 738 | |
| 739 | { |
| 740 | const int n = GetSelection(); |
| 741 | |
| 742 | wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId); |
| 743 | event.SetInt(n); |
| 744 | event.SetEventObject(this); |
| 745 | |
| 746 | if ( n > -1 ) |
| 747 | { |
| 748 | event.SetString(GetStringSelection()); |
| 749 | InitCommandEventWithItems(event, n); |
| 750 | } |
| 751 | |
| 752 | ProcessCommand(event); |
| 753 | } |
| 754 | break; |
| 755 | |
| 756 | // don't handle CBN_SELENDCANCEL: just leave m_lastAcceptedSelection |
| 757 | // valid and the selection will be undone in CBN_CLOSEUP above |
| 758 | |
| 759 | // don't handle CBN_SELCHANGE neither, we don't want to generate events |
| 760 | // while the dropdown is opened -- but do add it if we ever need this |
| 761 | |
| 762 | default: |
| 763 | return false; |
| 764 | } |
| 765 | |
| 766 | return true; |
| 767 | } |
| 768 | |
| 769 | WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd) |
| 770 | { |
| 771 | if ( !IsEnabled() ) |
| 772 | return MSWControlColorDisabled(hDC); |
| 773 | |
| 774 | return wxChoiceBase::MSWControlColor(hDC, hWnd); |
| 775 | } |
| 776 | |
| 777 | #endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__) |