| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/msw/combobox.cpp |
| 3 | // Purpose: wxComboBox class |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 01/02/97 |
| 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_COMBOBOX |
| 28 | |
| 29 | #include "wx/combobox.h" |
| 30 | |
| 31 | #ifndef WX_PRECOMP |
| 32 | #include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly" |
| 33 | #include "wx/settings.h" |
| 34 | #include "wx/log.h" |
| 35 | // for wxEVT_COMMAND_TEXT_ENTER |
| 36 | #include "wx/textctrl.h" |
| 37 | #include "wx/app.h" |
| 38 | #include "wx/brush.h" |
| 39 | #endif |
| 40 | |
| 41 | #include "wx/clipbrd.h" |
| 42 | #include "wx/msw/private.h" |
| 43 | |
| 44 | #if wxUSE_TOOLTIPS |
| 45 | #include "wx/tooltip.h" |
| 46 | #endif // wxUSE_TOOLTIPS |
| 47 | |
| 48 | // ---------------------------------------------------------------------------- |
| 49 | // wxWin macros |
| 50 | // ---------------------------------------------------------------------------- |
| 51 | |
| 52 | #if wxUSE_EXTENDED_RTTI |
| 53 | WX_DEFINE_FLAGS( wxComboBoxStyle ) |
| 54 | |
| 55 | wxBEGIN_FLAGS( wxComboBoxStyle ) |
| 56 | // new style border flags, we put them first to |
| 57 | // use them for streaming out |
| 58 | wxFLAGS_MEMBER(wxBORDER_SIMPLE) |
| 59 | wxFLAGS_MEMBER(wxBORDER_SUNKEN) |
| 60 | wxFLAGS_MEMBER(wxBORDER_DOUBLE) |
| 61 | wxFLAGS_MEMBER(wxBORDER_RAISED) |
| 62 | wxFLAGS_MEMBER(wxBORDER_STATIC) |
| 63 | wxFLAGS_MEMBER(wxBORDER_NONE) |
| 64 | |
| 65 | // old style border flags |
| 66 | wxFLAGS_MEMBER(wxSIMPLE_BORDER) |
| 67 | wxFLAGS_MEMBER(wxSUNKEN_BORDER) |
| 68 | wxFLAGS_MEMBER(wxDOUBLE_BORDER) |
| 69 | wxFLAGS_MEMBER(wxRAISED_BORDER) |
| 70 | wxFLAGS_MEMBER(wxSTATIC_BORDER) |
| 71 | wxFLAGS_MEMBER(wxBORDER) |
| 72 | |
| 73 | // standard window styles |
| 74 | wxFLAGS_MEMBER(wxTAB_TRAVERSAL) |
| 75 | wxFLAGS_MEMBER(wxCLIP_CHILDREN) |
| 76 | wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW) |
| 77 | wxFLAGS_MEMBER(wxWANTS_CHARS) |
| 78 | wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE) |
| 79 | wxFLAGS_MEMBER(wxALWAYS_SHOW_SB ) |
| 80 | wxFLAGS_MEMBER(wxVSCROLL) |
| 81 | wxFLAGS_MEMBER(wxHSCROLL) |
| 82 | |
| 83 | wxFLAGS_MEMBER(wxCB_SIMPLE) |
| 84 | wxFLAGS_MEMBER(wxCB_SORT) |
| 85 | wxFLAGS_MEMBER(wxCB_READONLY) |
| 86 | wxFLAGS_MEMBER(wxCB_DROPDOWN) |
| 87 | |
| 88 | wxEND_FLAGS( wxComboBoxStyle ) |
| 89 | |
| 90 | IMPLEMENT_DYNAMIC_CLASS_XTI(wxComboBox, wxControl,"wx/combobox.h") |
| 91 | |
| 92 | wxBEGIN_PROPERTIES_TABLE(wxComboBox) |
| 93 | wxEVENT_PROPERTY( Select , wxEVT_COMMAND_COMBOBOX_SELECTED , wxCommandEvent ) |
| 94 | wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent ) |
| 95 | |
| 96 | // TODO DELEGATES |
| 97 | wxPROPERTY( Font , wxFont , SetFont , GetFont , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) |
| 98 | wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) |
| 99 | wxPROPERTY( Value ,wxString, SetValue, GetValue, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) |
| 100 | wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) |
| 101 | wxPROPERTY_FLAGS( WindowStyle , wxComboBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style |
| 102 | wxEND_PROPERTIES_TABLE() |
| 103 | |
| 104 | wxBEGIN_HANDLERS_TABLE(wxComboBox) |
| 105 | wxEND_HANDLERS_TABLE() |
| 106 | |
| 107 | wxCONSTRUCTOR_5( wxComboBox , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size ) |
| 108 | |
| 109 | #else |
| 110 | |
| 111 | IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl) |
| 112 | |
| 113 | #endif |
| 114 | |
| 115 | BEGIN_EVENT_TABLE(wxComboBox, wxControl) |
| 116 | EVT_MENU(wxID_CUT, wxComboBox::OnCut) |
| 117 | EVT_MENU(wxID_COPY, wxComboBox::OnCopy) |
| 118 | EVT_MENU(wxID_PASTE, wxComboBox::OnPaste) |
| 119 | EVT_MENU(wxID_UNDO, wxComboBox::OnUndo) |
| 120 | EVT_MENU(wxID_REDO, wxComboBox::OnRedo) |
| 121 | EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete) |
| 122 | EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll) |
| 123 | |
| 124 | EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut) |
| 125 | EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy) |
| 126 | EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste) |
| 127 | EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo) |
| 128 | EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo) |
| 129 | EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete) |
| 130 | EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll) |
| 131 | END_EVENT_TABLE() |
| 132 | |
| 133 | // ---------------------------------------------------------------------------- |
| 134 | // function prototypes |
| 135 | // ---------------------------------------------------------------------------- |
| 136 | |
| 137 | LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd, |
| 138 | UINT message, |
| 139 | WPARAM wParam, |
| 140 | LPARAM lParam); |
| 141 | |
| 142 | // --------------------------------------------------------------------------- |
| 143 | // global vars |
| 144 | // --------------------------------------------------------------------------- |
| 145 | |
| 146 | // the pointer to standard radio button wnd proc |
| 147 | static WNDPROC gs_wndprocEdit = (WNDPROC)NULL; |
| 148 | |
| 149 | // ============================================================================ |
| 150 | // implementation |
| 151 | // ============================================================================ |
| 152 | |
| 153 | // ---------------------------------------------------------------------------- |
| 154 | // wnd proc for subclassed edit control |
| 155 | // ---------------------------------------------------------------------------- |
| 156 | |
| 157 | LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd, |
| 158 | UINT message, |
| 159 | WPARAM wParam, |
| 160 | LPARAM lParam) |
| 161 | { |
| 162 | HWND hwndCombo = ::GetParent(hWnd); |
| 163 | wxWindow *win = wxFindWinFromHandle((WXHWND)hwndCombo); |
| 164 | |
| 165 | switch ( message ) |
| 166 | { |
| 167 | // forward some messages to the combobox to generate the appropriate |
| 168 | // wxEvents from them |
| 169 | case WM_KEYUP: |
| 170 | case WM_KEYDOWN: |
| 171 | case WM_CHAR: |
| 172 | case WM_SYSCHAR: |
| 173 | case WM_SYSKEYDOWN: |
| 174 | case WM_SYSKEYUP: |
| 175 | case WM_SETFOCUS: |
| 176 | case WM_KILLFOCUS: |
| 177 | { |
| 178 | wxComboBox *combo = wxDynamicCast(win, wxComboBox); |
| 179 | if ( !combo ) |
| 180 | { |
| 181 | // we can get WM_KILLFOCUS while our parent is already half |
| 182 | // destroyed and hence doesn't look like a combobx any |
| 183 | // longer, check for it to avoid bogus assert failures |
| 184 | if ( !win->IsBeingDeleted() ) |
| 185 | { |
| 186 | wxFAIL_MSG( _T("should have combo as parent") ); |
| 187 | } |
| 188 | } |
| 189 | else if ( combo->MSWProcessEditMsg(message, wParam, lParam) ) |
| 190 | { |
| 191 | // handled by parent |
| 192 | return 0; |
| 193 | } |
| 194 | } |
| 195 | break; |
| 196 | |
| 197 | case WM_GETDLGCODE: |
| 198 | { |
| 199 | wxCHECK_MSG( win, 0, _T("should have a parent") ); |
| 200 | |
| 201 | if ( win->GetWindowStyle() & wxTE_PROCESS_ENTER ) |
| 202 | { |
| 203 | // need to return a custom dlg code or we'll never get it |
| 204 | return DLGC_WANTMESSAGE; |
| 205 | } |
| 206 | } |
| 207 | break; |
| 208 | |
| 209 | case WM_CUT: |
| 210 | case WM_COPY: |
| 211 | case WM_PASTE: |
| 212 | if( win->HandleClipboardEvent( message ) ) |
| 213 | return 0; |
| 214 | break; |
| 215 | } |
| 216 | |
| 217 | return ::CallWindowProc(CASTWNDPROC gs_wndprocEdit, hWnd, message, wParam, lParam); |
| 218 | } |
| 219 | |
| 220 | // ---------------------------------------------------------------------------- |
| 221 | // wxComboBox callbacks |
| 222 | // ---------------------------------------------------------------------------- |
| 223 | |
| 224 | WXLRESULT wxComboBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) |
| 225 | { |
| 226 | // TODO: handle WM_CTLCOLOR messages from our EDIT control to be able to |
| 227 | // set its colour correctly (to be the same as our own one) |
| 228 | |
| 229 | switch ( nMsg ) |
| 230 | { |
| 231 | case WM_SIZE: |
| 232 | // wxStaticBox can generate this message, when modifying the control's style. |
| 233 | // This causes the content of the combobox to be selected, for some reason. |
| 234 | case WM_STYLECHANGED: |
| 235 | { |
| 236 | // combobox selection sometimes spontaneously changes when its |
| 237 | // size changes, restore it to the old value if necessary |
| 238 | long fromOld, toOld; |
| 239 | GetSelection(&fromOld, &toOld); |
| 240 | WXLRESULT result = wxChoice::MSWWindowProc(nMsg, wParam, lParam); |
| 241 | |
| 242 | long fromNew, toNew; |
| 243 | GetSelection(&fromNew, &toNew); |
| 244 | |
| 245 | if ( fromOld != fromNew || toOld != toNew ) |
| 246 | { |
| 247 | SetSelection(fromOld, toOld); |
| 248 | } |
| 249 | |
| 250 | return result; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | return wxChoice::MSWWindowProc(nMsg, wParam, lParam); |
| 255 | } |
| 256 | |
| 257 | bool wxComboBox::MSWProcessEditMsg(WXUINT msg, WXWPARAM wParam, WXLPARAM lParam) |
| 258 | { |
| 259 | switch ( msg ) |
| 260 | { |
| 261 | case WM_CHAR: |
| 262 | // for compatibility with wxTextCtrl, generate a special message |
| 263 | // when Enter is pressed |
| 264 | if ( wParam == VK_RETURN ) |
| 265 | { |
| 266 | if (SendMessage(GetHwnd(), CB_GETDROPPEDSTATE, 0, 0)) |
| 267 | return false; |
| 268 | |
| 269 | wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId); |
| 270 | |
| 271 | const int sel = GetSelection(); |
| 272 | event.SetInt(sel); |
| 273 | event.SetString(GetValue()); |
| 274 | InitCommandEventWithItems(event, sel); |
| 275 | |
| 276 | if ( ProcessCommand(event) ) |
| 277 | { |
| 278 | // don't let the event through to the native control |
| 279 | // because it doesn't need it and may generate an annoying |
| 280 | // beep if it gets it |
| 281 | return true; |
| 282 | } |
| 283 | } |
| 284 | // fall through |
| 285 | |
| 286 | case WM_SYSCHAR: |
| 287 | return HandleChar(wParam, lParam, true /* isASCII */); |
| 288 | |
| 289 | case WM_SYSKEYDOWN: |
| 290 | case WM_KEYDOWN: |
| 291 | return HandleKeyDown(wParam, lParam); |
| 292 | |
| 293 | case WM_SYSKEYUP: |
| 294 | case WM_KEYUP: |
| 295 | return HandleKeyUp(wParam, lParam); |
| 296 | |
| 297 | case WM_SETFOCUS: |
| 298 | return HandleSetFocus((WXHWND)wParam); |
| 299 | |
| 300 | case WM_KILLFOCUS: |
| 301 | return HandleKillFocus((WXHWND)wParam); |
| 302 | } |
| 303 | |
| 304 | return false; |
| 305 | } |
| 306 | |
| 307 | bool wxComboBox::MSWCommand(WXUINT param, WXWORD id) |
| 308 | { |
| 309 | int sel = -1; |
| 310 | wxString value; |
| 311 | |
| 312 | switch ( param ) |
| 313 | { |
| 314 | case CBN_SELENDOK: |
| 315 | #ifndef __SMARTPHONE__ |
| 316 | // we need to reset this to prevent the selection from being undone |
| 317 | // by wxChoice, see wxChoice::MSWCommand() and comments there |
| 318 | m_lastAcceptedSelection = wxID_NONE; |
| 319 | #endif |
| 320 | |
| 321 | // set these variables so that they could be also fixed in |
| 322 | // CBN_EDITCHANGE below |
| 323 | sel = GetSelection(); |
| 324 | value = GetStringSelection(); |
| 325 | |
| 326 | // this string is going to become the new combobox value soon but |
| 327 | // we need it to be done right now, otherwise the event handler |
| 328 | // could get a wrong value when it calls our GetValue() |
| 329 | ::SetWindowText(GetHwnd(), value); |
| 330 | |
| 331 | { |
| 332 | wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, GetId()); |
| 333 | event.SetInt(sel); |
| 334 | event.SetString(value); |
| 335 | InitCommandEventWithItems(event, sel); |
| 336 | |
| 337 | ProcessCommand(event); |
| 338 | } |
| 339 | |
| 340 | // fall through: for compability with wxGTK, also send the text |
| 341 | // update event when the selection changes (this also seems more |
| 342 | // logical as the text does change) |
| 343 | |
| 344 | case CBN_EDITCHANGE: |
| 345 | { |
| 346 | wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId()); |
| 347 | |
| 348 | // if sel != -1, value was already initialized above |
| 349 | if ( sel == -1 ) |
| 350 | { |
| 351 | value = wxGetWindowText(GetHwnd()); |
| 352 | } |
| 353 | |
| 354 | event.SetString(value); |
| 355 | InitCommandEventWithItems(event, sel); |
| 356 | |
| 357 | ProcessCommand(event); |
| 358 | } |
| 359 | break; |
| 360 | |
| 361 | default: |
| 362 | return wxChoice::MSWCommand(param, id); |
| 363 | } |
| 364 | |
| 365 | // skip wxChoice version as it would generate its own events for |
| 366 | // CBN_SELENDOK |
| 367 | return wxControl::MSWCommand(param, id); |
| 368 | } |
| 369 | |
| 370 | WXHWND wxComboBox::GetEditHWND() const |
| 371 | { |
| 372 | // this function should not be called for wxCB_READONLY controls, it is |
| 373 | // the callers responsability to check this |
| 374 | wxASSERT_MSG( !(GetWindowStyle() & wxCB_READONLY), |
| 375 | _T("read-only combobox doesn't have any edit control") ); |
| 376 | |
| 377 | POINT pt; |
| 378 | pt.x = pt.y = 4; |
| 379 | HWND hwndEdit = ::ChildWindowFromPoint(GetHwnd(), pt); |
| 380 | if ( !hwndEdit || hwndEdit == GetHwnd() ) |
| 381 | { |
| 382 | wxFAIL_MSG(_T("not read only combobox without edit control?")); |
| 383 | } |
| 384 | |
| 385 | return (WXHWND)hwndEdit; |
| 386 | } |
| 387 | |
| 388 | // ---------------------------------------------------------------------------- |
| 389 | // wxComboBox creation |
| 390 | // ---------------------------------------------------------------------------- |
| 391 | |
| 392 | bool wxComboBox::Create(wxWindow *parent, wxWindowID id, |
| 393 | const wxString& value, |
| 394 | const wxPoint& pos, |
| 395 | const wxSize& size, |
| 396 | int n, const wxString choices[], |
| 397 | long style, |
| 398 | const wxValidator& validator, |
| 399 | const wxString& name) |
| 400 | { |
| 401 | // pretend that wxComboBox is hidden while it is positioned and resized and |
| 402 | // show it only right before leaving this method because otherwise there is |
| 403 | // some noticeable flicker while the control rearranges itself |
| 404 | m_isShown = false; |
| 405 | |
| 406 | if ( !CreateAndInit(parent, id, pos, size, n, choices, style, |
| 407 | validator, name) ) |
| 408 | return false; |
| 409 | |
| 410 | // we shouldn't call SetValue() for an empty string because this would |
| 411 | // (correctly) result in an assert with a read only combobox and is useless |
| 412 | // for the other ones anyhow |
| 413 | if ( !value.empty() ) |
| 414 | SetValue(value); |
| 415 | |
| 416 | // a (not read only) combobox is, in fact, 2 controls: the combobox itself |
| 417 | // and an edit control inside it and if we want to catch events from this |
| 418 | // edit control, we must subclass it as well |
| 419 | if ( !(style & wxCB_READONLY) ) |
| 420 | { |
| 421 | gs_wndprocEdit = wxSetWindowProc((HWND)GetEditHWND(), wxComboEditWndProc); |
| 422 | } |
| 423 | |
| 424 | // and finally, show the control |
| 425 | Show(true); |
| 426 | |
| 427 | return true; |
| 428 | } |
| 429 | |
| 430 | bool wxComboBox::Create(wxWindow *parent, wxWindowID id, |
| 431 | const wxString& value, |
| 432 | const wxPoint& pos, |
| 433 | const wxSize& size, |
| 434 | const wxArrayString& choices, |
| 435 | long style, |
| 436 | const wxValidator& validator, |
| 437 | const wxString& name) |
| 438 | { |
| 439 | wxCArrayString chs(choices); |
| 440 | return Create(parent, id, value, pos, size, chs.GetCount(), |
| 441 | chs.GetStrings(), style, validator, name); |
| 442 | } |
| 443 | |
| 444 | WXDWORD wxComboBox::MSWGetStyle(long style, WXDWORD *exstyle) const |
| 445 | { |
| 446 | // we never have an external border |
| 447 | WXDWORD msStyle = wxChoice::MSWGetStyle |
| 448 | ( |
| 449 | (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle |
| 450 | ); |
| 451 | |
| 452 | // usually WS_TABSTOP is added by wxControl::MSWGetStyle() but as we're |
| 453 | // created hidden (see Create() above), it is not done for us but we still |
| 454 | // want to have this style |
| 455 | msStyle |= WS_TABSTOP; |
| 456 | |
| 457 | // remove the style always added by wxChoice |
| 458 | msStyle &= ~CBS_DROPDOWNLIST; |
| 459 | |
| 460 | if ( style & wxCB_READONLY ) |
| 461 | msStyle |= CBS_DROPDOWNLIST; |
| 462 | #ifndef __WXWINCE__ |
| 463 | else if ( style & wxCB_SIMPLE ) |
| 464 | msStyle |= CBS_SIMPLE; // A list (shown always) and edit control |
| 465 | #endif |
| 466 | else |
| 467 | msStyle |= CBS_DROPDOWN; |
| 468 | |
| 469 | // there is no reason to not always use CBS_AUTOHSCROLL, so do use it |
| 470 | msStyle |= CBS_AUTOHSCROLL; |
| 471 | |
| 472 | // NB: we used to also add CBS_NOINTEGRALHEIGHT here but why? |
| 473 | |
| 474 | return msStyle; |
| 475 | } |
| 476 | |
| 477 | // ---------------------------------------------------------------------------- |
| 478 | // wxComboBox text control-like methods |
| 479 | // ---------------------------------------------------------------------------- |
| 480 | |
| 481 | wxString wxComboBox::GetValue() const |
| 482 | { |
| 483 | return wxGetWindowText(m_hWnd); |
| 484 | } |
| 485 | |
| 486 | void wxComboBox::SetValue(const wxString& value) |
| 487 | { |
| 488 | if ( HasFlag(wxCB_READONLY) ) |
| 489 | SetStringSelection(value); |
| 490 | else |
| 491 | SetWindowText(GetHwnd(), value.c_str()); |
| 492 | } |
| 493 | |
| 494 | // Clipboard operations |
| 495 | void wxComboBox::Copy() |
| 496 | { |
| 497 | SendMessage(GetHwnd(), WM_COPY, 0, 0L); |
| 498 | } |
| 499 | |
| 500 | void wxComboBox::Cut() |
| 501 | { |
| 502 | SendMessage(GetHwnd(), WM_CUT, 0, 0L); |
| 503 | } |
| 504 | |
| 505 | void wxComboBox::Paste() |
| 506 | { |
| 507 | SendMessage(GetHwnd(), WM_PASTE, 0, 0L); |
| 508 | } |
| 509 | |
| 510 | void wxComboBox::Undo() |
| 511 | { |
| 512 | if (CanUndo()) |
| 513 | { |
| 514 | HWND hEditWnd = (HWND) GetEditHWND(); |
| 515 | if ( hEditWnd ) |
| 516 | ::SendMessage(hEditWnd, EM_UNDO, 0, 0); |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | void wxComboBox::Redo() |
| 521 | { |
| 522 | if (CanUndo()) |
| 523 | { |
| 524 | // Same as Undo, since Undo undoes the undo, i.e. a redo. |
| 525 | HWND hEditWnd = (HWND) GetEditHWND(); |
| 526 | if ( hEditWnd ) |
| 527 | ::SendMessage(hEditWnd, EM_UNDO, 0, 0); |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | void wxComboBox::SelectAll() |
| 532 | { |
| 533 | SetSelection(0, GetLastPosition()); |
| 534 | } |
| 535 | |
| 536 | bool wxComboBox::CanUndo() const |
| 537 | { |
| 538 | if (!IsEditable()) |
| 539 | return false; |
| 540 | |
| 541 | HWND hEditWnd = (HWND) GetEditHWND(); |
| 542 | if ( hEditWnd ) |
| 543 | return ::SendMessage(hEditWnd, EM_CANUNDO, 0, 0) != 0; |
| 544 | else |
| 545 | return false; |
| 546 | } |
| 547 | |
| 548 | bool wxComboBox::CanRedo() const |
| 549 | { |
| 550 | if (!IsEditable()) |
| 551 | return false; |
| 552 | |
| 553 | HWND hEditWnd = (HWND) GetEditHWND(); |
| 554 | if ( hEditWnd ) |
| 555 | return ::SendMessage(hEditWnd, EM_CANUNDO, 0, 0) != 0; |
| 556 | else |
| 557 | return false; |
| 558 | } |
| 559 | |
| 560 | bool wxComboBox::HasSelection() const |
| 561 | { |
| 562 | long from, to; |
| 563 | GetSelection(&from, &to); |
| 564 | return from != to; |
| 565 | } |
| 566 | |
| 567 | bool wxComboBox::CanCopy() const |
| 568 | { |
| 569 | // Can copy if there's a selection |
| 570 | return HasSelection(); |
| 571 | } |
| 572 | |
| 573 | bool wxComboBox::CanCut() const |
| 574 | { |
| 575 | return IsEditable() && CanCopy(); |
| 576 | } |
| 577 | |
| 578 | bool wxComboBox::CanPaste() const |
| 579 | { |
| 580 | if ( !IsEditable() ) |
| 581 | return false; |
| 582 | |
| 583 | // Standard edit control: check for straight text on clipboard |
| 584 | if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) ) |
| 585 | return false; |
| 586 | |
| 587 | bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0; |
| 588 | ::CloseClipboard(); |
| 589 | |
| 590 | return isTextAvailable; |
| 591 | } |
| 592 | |
| 593 | bool wxComboBox::IsEditable() const |
| 594 | { |
| 595 | return !HasFlag(wxCB_READONLY); |
| 596 | } |
| 597 | |
| 598 | void wxComboBox::SetEditable(bool editable) |
| 599 | { |
| 600 | HWND hWnd = (HWND)GetEditHWND(); |
| 601 | if ( !::SendMessage(hWnd, EM_SETREADONLY, !editable, 0) ) |
| 602 | { |
| 603 | wxLogLastError(_T("SendMessage(EM_SETREADONLY)")); |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | void wxComboBox::SetInsertionPoint(long pos) |
| 608 | { |
| 609 | if ( GetWindowStyle() & wxCB_READONLY ) |
| 610 | return; |
| 611 | |
| 612 | HWND hWnd = GetHwnd(); |
| 613 | ::SendMessage(hWnd, CB_SETEDITSEL, 0, MAKELPARAM(pos, pos)); |
| 614 | HWND hEditWnd = (HWND) GetEditHWND(); |
| 615 | if ( hEditWnd ) |
| 616 | { |
| 617 | // Scroll insertion point into view |
| 618 | SendMessage(hEditWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0); |
| 619 | // Why is this necessary? (Copied from wxTextCtrl::SetInsertionPoint) |
| 620 | SendMessage(hEditWnd, EM_REPLACESEL, 0, (LPARAM) wxEmptyString); |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | void wxComboBox::SetInsertionPointEnd() |
| 625 | { |
| 626 | // setting insertion point doesn't make sense for read only comboboxes |
| 627 | if ( !(GetWindowStyle() & wxCB_READONLY) ) |
| 628 | { |
| 629 | wxTextPos pos = GetLastPosition(); |
| 630 | SetInsertionPoint(pos); |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | long wxComboBox::GetInsertionPoint() const |
| 635 | { |
| 636 | // CB_GETEDITSEL returns the index of the first character of the selection in |
| 637 | // its low-order word |
| 638 | DWORD pos= (DWORD)::SendMessage(GetHwnd(), CB_GETEDITSEL, 0, 0L); |
| 639 | return LOWORD(pos); |
| 640 | } |
| 641 | |
| 642 | wxTextPos wxComboBox::GetLastPosition() const |
| 643 | { |
| 644 | HWND hEditWnd = (HWND) GetEditHWND(); |
| 645 | |
| 646 | // Get number of characters in the last (only) line. We'll add this to the character |
| 647 | // index for the last line, 1st position. |
| 648 | wxTextPos lineLength = (wxTextPos)SendMessage(hEditWnd, EM_LINELENGTH, (WPARAM) 0, (LPARAM)0L); |
| 649 | |
| 650 | return lineLength; |
| 651 | } |
| 652 | |
| 653 | void wxComboBox::Replace(long from, long to, const wxString& value) |
| 654 | { |
| 655 | #if wxUSE_CLIPBOARD |
| 656 | Remove(from, to); |
| 657 | |
| 658 | // Now replace with 'value', by pasting. |
| 659 | wxSetClipboardData(wxDF_TEXT, (wxObject *)(const wxChar *)value, 0, 0); |
| 660 | |
| 661 | // Paste into edit control |
| 662 | SendMessage(GetHwnd(), WM_PASTE, (WPARAM)0, (LPARAM)0L); |
| 663 | #else |
| 664 | wxUnusedVar(from); |
| 665 | wxUnusedVar(to); |
| 666 | wxUnusedVar(value); |
| 667 | #endif |
| 668 | } |
| 669 | |
| 670 | void wxComboBox::Remove(long from, long to) |
| 671 | { |
| 672 | // Set selection and remove it |
| 673 | SetSelection(from, to); |
| 674 | SendMessage(GetHwnd(), WM_CUT, (WPARAM)0, (LPARAM)0); |
| 675 | } |
| 676 | |
| 677 | void wxComboBox::SetSelection(long from, long to) |
| 678 | { |
| 679 | // if from and to are both -1, it means (in wxWidgets) that all text should |
| 680 | // be selected, translate this into Windows convention |
| 681 | if ( (from == -1) && (to == -1) ) |
| 682 | { |
| 683 | from = 0; |
| 684 | } |
| 685 | |
| 686 | if ( SendMessage(GetHwnd(), CB_SETEDITSEL, |
| 687 | 0, (LPARAM)MAKELONG(from, to)) == CB_ERR ) |
| 688 | { |
| 689 | wxLogDebug(_T("CB_SETEDITSEL failed")); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | void wxComboBox::GetSelection(long* from, long* to) const |
| 694 | { |
| 695 | DWORD dwStart, dwEnd; |
| 696 | if ( ::SendMessage(GetHwnd(), CB_GETEDITSEL, |
| 697 | (WPARAM)&dwStart, (LPARAM)&dwEnd) == CB_ERR ) |
| 698 | { |
| 699 | *from = |
| 700 | *to = 0; |
| 701 | } |
| 702 | else |
| 703 | { |
| 704 | *from = dwStart; |
| 705 | *to = dwEnd; |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | // ---------------------------------------------------------------------------- |
| 710 | // standard event handling |
| 711 | // ---------------------------------------------------------------------------- |
| 712 | |
| 713 | void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event)) |
| 714 | { |
| 715 | Cut(); |
| 716 | } |
| 717 | |
| 718 | void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event)) |
| 719 | { |
| 720 | Copy(); |
| 721 | } |
| 722 | |
| 723 | void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event)) |
| 724 | { |
| 725 | Paste(); |
| 726 | } |
| 727 | |
| 728 | void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event)) |
| 729 | { |
| 730 | Undo(); |
| 731 | } |
| 732 | |
| 733 | void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event)) |
| 734 | { |
| 735 | Redo(); |
| 736 | } |
| 737 | |
| 738 | void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event)) |
| 739 | { |
| 740 | long from, to; |
| 741 | GetSelection(& from, & to); |
| 742 | if (from != -1 && to != -1) |
| 743 | Remove(from, to); |
| 744 | } |
| 745 | |
| 746 | void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event)) |
| 747 | { |
| 748 | SetSelection(-1, -1); |
| 749 | } |
| 750 | |
| 751 | void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event) |
| 752 | { |
| 753 | event.Enable( CanCut() ); |
| 754 | } |
| 755 | |
| 756 | void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event) |
| 757 | { |
| 758 | event.Enable( CanCopy() ); |
| 759 | } |
| 760 | |
| 761 | void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event) |
| 762 | { |
| 763 | event.Enable( CanPaste() ); |
| 764 | } |
| 765 | |
| 766 | void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event) |
| 767 | { |
| 768 | event.Enable( CanUndo() ); |
| 769 | } |
| 770 | |
| 771 | void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event) |
| 772 | { |
| 773 | event.Enable( CanRedo() ); |
| 774 | } |
| 775 | |
| 776 | void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event) |
| 777 | { |
| 778 | event.Enable(HasSelection() && IsEditable()); |
| 779 | } |
| 780 | |
| 781 | void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event) |
| 782 | { |
| 783 | event.Enable(GetLastPosition() > 0); |
| 784 | } |
| 785 | |
| 786 | #endif // wxUSE_COMBOBOX |