| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: 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 | #ifdef __GNUG__ |
| 21 | #pragma implementation "combobox.h" |
| 22 | #endif |
| 23 | |
| 24 | // For compilers that support precompilation, includes "wx.h". |
| 25 | #include "wx/wxprec.h" |
| 26 | |
| 27 | #ifdef __BORLANDC__ |
| 28 | #pragma hdrstop |
| 29 | #endif |
| 30 | |
| 31 | #if wxUSE_COMBOBOX |
| 32 | |
| 33 | #ifndef WX_PRECOMP |
| 34 | #include "wx/settings.h" |
| 35 | #include "wx/log.h" |
| 36 | // for wxEVT_COMMAND_TEXT_ENTER |
| 37 | #include "wx/textctrl.h" |
| 38 | #endif |
| 39 | |
| 40 | #include "wx/combobox.h" |
| 41 | #include "wx/brush.h" |
| 42 | #include "wx/clipbrd.h" |
| 43 | #include "wx/msw/private.h" |
| 44 | |
| 45 | #if wxUSE_TOOLTIPS |
| 46 | #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__) |
| 47 | #include <commctrl.h> |
| 48 | #endif |
| 49 | #include "wx/tooltip.h" |
| 50 | #endif // wxUSE_TOOLTIPS |
| 51 | |
| 52 | // ---------------------------------------------------------------------------- |
| 53 | // wxWin macros |
| 54 | // ---------------------------------------------------------------------------- |
| 55 | |
| 56 | IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl) |
| 57 | |
| 58 | // ---------------------------------------------------------------------------- |
| 59 | // function prototypes |
| 60 | // ---------------------------------------------------------------------------- |
| 61 | |
| 62 | LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd, |
| 63 | UINT message, |
| 64 | WPARAM wParam, |
| 65 | LPARAM lParam); |
| 66 | |
| 67 | // --------------------------------------------------------------------------- |
| 68 | // global vars |
| 69 | // --------------------------------------------------------------------------- |
| 70 | |
| 71 | // the pointer to standard radio button wnd proc |
| 72 | static WXFARPROC gs_wndprocEdit = (WXFARPROC)NULL; |
| 73 | |
| 74 | // ============================================================================ |
| 75 | // implementation |
| 76 | // ============================================================================ |
| 77 | |
| 78 | // ---------------------------------------------------------------------------- |
| 79 | // wnd proc for subclassed edit control |
| 80 | // ---------------------------------------------------------------------------- |
| 81 | |
| 82 | LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd, |
| 83 | UINT message, |
| 84 | WPARAM wParam, |
| 85 | LPARAM lParam) |
| 86 | { |
| 87 | HWND hwndCombo = ::GetParent(hWnd); |
| 88 | wxWindow *win = wxFindWinFromHandle((WXHWND)hwndCombo); |
| 89 | |
| 90 | switch ( message ) |
| 91 | { |
| 92 | // forward some messages to the combobox to generate the appropriate |
| 93 | // wxEvents from them |
| 94 | case WM_KEYUP: |
| 95 | case WM_KEYDOWN: |
| 96 | case WM_CHAR: |
| 97 | case WM_SETFOCUS: |
| 98 | case WM_KILLFOCUS: |
| 99 | { |
| 100 | wxComboBox *combo = wxDynamicCast(win, wxComboBox); |
| 101 | if ( !combo ) |
| 102 | { |
| 103 | // we can get WM_KILLFOCUS while our parent is already half |
| 104 | // destroyed and hence doesn't look like a combobx any |
| 105 | // longer, check for it to avoid bogus assert failures |
| 106 | if ( !win->IsBeingDeleted() ) |
| 107 | { |
| 108 | wxFAIL_MSG( _T("should have combo as parent") ); |
| 109 | } |
| 110 | } |
| 111 | else if ( combo->MSWProcessEditMsg(message, wParam, lParam) ) |
| 112 | { |
| 113 | // handled by parent |
| 114 | return 0; |
| 115 | } |
| 116 | } |
| 117 | break; |
| 118 | |
| 119 | case WM_GETDLGCODE: |
| 120 | { |
| 121 | wxCHECK_MSG( win, 0, _T("should have a parent") ); |
| 122 | |
| 123 | if ( win->GetWindowStyle() & wxPROCESS_ENTER ) |
| 124 | { |
| 125 | // need to return a custom dlg code or we'll never get it |
| 126 | return DLGC_WANTMESSAGE; |
| 127 | } |
| 128 | } |
| 129 | break; |
| 130 | |
| 131 | // deal with tooltips here |
| 132 | #if wxUSE_TOOLTIPS && defined(TTN_NEEDTEXT) |
| 133 | case WM_NOTIFY: |
| 134 | { |
| 135 | wxCHECK_MSG( win, 0, _T("should have a parent") ); |
| 136 | |
| 137 | NMHDR* hdr = (NMHDR *)lParam; |
| 138 | if ( hdr->code == TTN_NEEDTEXT ) |
| 139 | { |
| 140 | wxToolTip *tooltip = win->GetToolTip(); |
| 141 | if ( tooltip ) |
| 142 | { |
| 143 | TOOLTIPTEXT *ttt = (TOOLTIPTEXT *)lParam; |
| 144 | ttt->lpszText = (wxChar *)tooltip->GetTip().c_str(); |
| 145 | } |
| 146 | |
| 147 | // processed |
| 148 | return 0; |
| 149 | } |
| 150 | } |
| 151 | break; |
| 152 | #endif // wxUSE_TOOLTIPS |
| 153 | } |
| 154 | |
| 155 | return ::CallWindowProc(CASTWNDPROC gs_wndprocEdit, hWnd, message, wParam, lParam); |
| 156 | } |
| 157 | |
| 158 | WXHBRUSH wxComboBox::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor), |
| 159 | WXUINT WXUNUSED(message), |
| 160 | WXWPARAM WXUNUSED(wParam), |
| 161 | WXLPARAM WXUNUSED(lParam) |
| 162 | ) |
| 163 | { |
| 164 | HDC hdc = (HDC)pDC; |
| 165 | if (GetParent()->GetTransparentBackground()) |
| 166 | SetBkMode(hdc, TRANSPARENT); |
| 167 | else |
| 168 | SetBkMode(hdc, OPAQUE); |
| 169 | |
| 170 | wxColour colBack = GetBackgroundColour(); |
| 171 | |
| 172 | if (!IsEnabled()) |
| 173 | colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE); |
| 174 | |
| 175 | ::SetBkColor(hdc, wxColourToRGB(colBack)); |
| 176 | ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour())); |
| 177 | |
| 178 | wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID); |
| 179 | |
| 180 | return (WXHBRUSH)brush->GetResourceHandle(); |
| 181 | } |
| 182 | |
| 183 | // ---------------------------------------------------------------------------- |
| 184 | // wxComboBox |
| 185 | // ---------------------------------------------------------------------------- |
| 186 | |
| 187 | bool wxComboBox::MSWProcessEditMsg(WXUINT msg, WXWPARAM wParam, WXLPARAM lParam) |
| 188 | { |
| 189 | switch ( msg ) |
| 190 | { |
| 191 | case WM_CHAR: |
| 192 | // for compatibility with wxTextCtrl, generate a special message |
| 193 | // when Enter is pressed |
| 194 | if ( wParam == VK_RETURN ) |
| 195 | { |
| 196 | wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId); |
| 197 | InitCommandEvent(event); |
| 198 | event.SetString(GetValue()); |
| 199 | event.SetInt(GetSelection()); |
| 200 | ProcessCommand(event); |
| 201 | } |
| 202 | |
| 203 | return HandleChar(wParam, lParam, TRUE /* isASCII */); |
| 204 | |
| 205 | case WM_KEYDOWN: |
| 206 | return HandleKeyDown(wParam, lParam); |
| 207 | |
| 208 | case WM_KEYUP: |
| 209 | return HandleKeyUp(wParam, lParam); |
| 210 | |
| 211 | case WM_SETFOCUS: |
| 212 | return HandleSetFocus((WXHWND)wParam); |
| 213 | |
| 214 | case WM_KILLFOCUS: |
| 215 | return HandleKillFocus((WXHWND)wParam); |
| 216 | } |
| 217 | |
| 218 | return FALSE; |
| 219 | } |
| 220 | |
| 221 | bool wxComboBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) |
| 222 | { |
| 223 | wxString value; |
| 224 | int sel = -1; |
| 225 | switch ( param ) |
| 226 | { |
| 227 | case CBN_SELCHANGE: |
| 228 | sel = GetSelection(); |
| 229 | if ( sel > -1 ) |
| 230 | { |
| 231 | value = GetString(sel); |
| 232 | |
| 233 | wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, GetId()); |
| 234 | event.SetInt(sel); |
| 235 | event.SetEventObject(this); |
| 236 | event.SetString(value); |
| 237 | ProcessCommand(event); |
| 238 | } |
| 239 | else |
| 240 | { |
| 241 | break; |
| 242 | } |
| 243 | |
| 244 | // fall through: for compability with wxGTK, also send the text |
| 245 | // update event when the selection changes (this also seems more |
| 246 | // logical as the text does change) |
| 247 | |
| 248 | case CBN_EDITCHANGE: |
| 249 | { |
| 250 | wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId()); |
| 251 | |
| 252 | // if sel != -1, value was initialized above (and we can't use |
| 253 | // GetValue() here as it would return the old selection and we |
| 254 | // want the new one) |
| 255 | if ( sel == -1 ) |
| 256 | { |
| 257 | value = GetValue(); |
| 258 | } |
| 259 | else // we're synthesizing text updated event from sel change |
| 260 | { |
| 261 | // we need to do this because the user code expects |
| 262 | // wxComboBox::GetValue() to return the new value from |
| 263 | // "text updated" handler but it hadn't been updated yet |
| 264 | SetValue(value); |
| 265 | } |
| 266 | |
| 267 | event.SetString(value); |
| 268 | event.SetEventObject(this); |
| 269 | ProcessCommand(event); |
| 270 | } |
| 271 | break; |
| 272 | } |
| 273 | |
| 274 | // there is no return value for the CBN_ notifications, so always return |
| 275 | // FALSE from here to pass the message to DefWindowProc() |
| 276 | return FALSE; |
| 277 | } |
| 278 | |
| 279 | WXHWND wxComboBox::GetEditHWND() const |
| 280 | { |
| 281 | // this function should not be called for wxCB_READONLY controls, it is |
| 282 | // the callers responsability to check this |
| 283 | wxASSERT_MSG( !(GetWindowStyle() & wxCB_READONLY), |
| 284 | _T("read-only combobox doesn't have any edit control") ); |
| 285 | |
| 286 | POINT pt; |
| 287 | pt.x = pt.y = 4; |
| 288 | HWND hwndEdit = ::ChildWindowFromPoint(GetHwnd(), pt); |
| 289 | if ( !hwndEdit || hwndEdit == GetHwnd() ) |
| 290 | { |
| 291 | wxFAIL_MSG(_T("not read only combobox without edit control?")); |
| 292 | } |
| 293 | |
| 294 | return (WXHWND)hwndEdit; |
| 295 | } |
| 296 | |
| 297 | bool wxComboBox::Create(wxWindow *parent, wxWindowID id, |
| 298 | const wxString& value, |
| 299 | const wxPoint& pos, |
| 300 | const wxSize& size, |
| 301 | int n, const wxString choices[], |
| 302 | long style, |
| 303 | const wxValidator& validator, |
| 304 | const wxString& name) |
| 305 | { |
| 306 | // pretend that wxComboBox is hidden while it is positioned and resized and |
| 307 | // show it only right before leaving this method because otherwise there is |
| 308 | // some noticeable flicker while the control rearranges itself |
| 309 | m_isShown = FALSE; |
| 310 | |
| 311 | // first create wxWin object |
| 312 | if ( !CreateControl(parent, id, pos, size, style, validator, name) ) |
| 313 | return FALSE; |
| 314 | |
| 315 | // get the right style |
| 316 | long msStyle = WS_TABSTOP | WS_VSCROLL | WS_HSCROLL | |
| 317 | CBS_AUTOHSCROLL | CBS_NOINTEGRALHEIGHT /* | WS_CLIPSIBLINGS */; |
| 318 | if ( style & wxCB_READONLY ) |
| 319 | msStyle |= CBS_DROPDOWNLIST; |
| 320 | else if ( style & wxCB_SIMPLE ) |
| 321 | msStyle |= CBS_SIMPLE; // A list (shown always) and edit control |
| 322 | else |
| 323 | msStyle |= CBS_DROPDOWN; |
| 324 | |
| 325 | if ( style & wxCB_SORT ) |
| 326 | msStyle |= CBS_SORT; |
| 327 | |
| 328 | if ( style & wxCLIP_SIBLINGS ) |
| 329 | msStyle |= WS_CLIPSIBLINGS; |
| 330 | |
| 331 | |
| 332 | // and now create the MSW control |
| 333 | if ( !MSWCreateControl(_T("COMBOBOX"), msStyle) ) |
| 334 | return FALSE; |
| 335 | |
| 336 | // A choice/combobox normally has a white background (or other, depending |
| 337 | // on global settings) rather than inheriting the parent's background colour. |
| 338 | SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)); |
| 339 | |
| 340 | for ( int i = 0; i < n; i++ ) |
| 341 | { |
| 342 | Append(choices[i]); |
| 343 | } |
| 344 | |
| 345 | if ( !value.IsEmpty() ) |
| 346 | { |
| 347 | SetValue(value); |
| 348 | } |
| 349 | |
| 350 | // do this after appending the values to the combobox so that autosizing |
| 351 | // works correctly |
| 352 | SetSize(pos.x, pos.y, size.x, size.y); |
| 353 | |
| 354 | // a (not read only) combobox is, in fact, 2 controls: the combobox itself |
| 355 | // and an edit control inside it and if we want to catch events from this |
| 356 | // edit control, we must subclass it as well |
| 357 | if ( !(style & wxCB_READONLY) ) |
| 358 | { |
| 359 | gs_wndprocEdit = (WXFARPROC)::SetWindowLong |
| 360 | ( |
| 361 | (HWND)GetEditHWND(), |
| 362 | GWL_WNDPROC, |
| 363 | (LPARAM)wxComboEditWndProc |
| 364 | ); |
| 365 | } |
| 366 | |
| 367 | // and finally, show the control |
| 368 | Show(TRUE); |
| 369 | |
| 370 | return TRUE; |
| 371 | } |
| 372 | |
| 373 | void wxComboBox::SetValue(const wxString& value) |
| 374 | { |
| 375 | if ( HasFlag(wxCB_READONLY) ) |
| 376 | SetStringSelection(value); |
| 377 | else |
| 378 | SetWindowText(GetHwnd(), value.c_str()); |
| 379 | } |
| 380 | |
| 381 | // Clipboard operations |
| 382 | void wxComboBox::Copy() |
| 383 | { |
| 384 | SendMessage(GetHwnd(), WM_COPY, 0, 0L); |
| 385 | } |
| 386 | |
| 387 | void wxComboBox::Cut() |
| 388 | { |
| 389 | SendMessage(GetHwnd(), WM_CUT, 0, 0L); |
| 390 | } |
| 391 | |
| 392 | void wxComboBox::Paste() |
| 393 | { |
| 394 | SendMessage(GetHwnd(), WM_PASTE, 0, 0L); |
| 395 | } |
| 396 | |
| 397 | void wxComboBox::SetEditable(bool WXUNUSED(editable)) |
| 398 | { |
| 399 | // Can't implement in MSW? |
| 400 | // HWND hWnd = GetHwnd(); |
| 401 | // SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L); |
| 402 | } |
| 403 | |
| 404 | void wxComboBox::SetInsertionPoint(long pos) |
| 405 | { |
| 406 | if ( GetWindowStyle() & wxCB_READONLY ) |
| 407 | return; |
| 408 | |
| 409 | #ifdef __WIN32__ |
| 410 | HWND hWnd = GetHwnd(); |
| 411 | ::SendMessage(hWnd, CB_SETEDITSEL, 0, MAKELPARAM(pos, pos)); |
| 412 | HWND hEditWnd = (HWND) GetEditHWND() ; |
| 413 | if ( hEditWnd ) |
| 414 | { |
| 415 | // Scroll insertion point into view |
| 416 | SendMessage(hEditWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0); |
| 417 | // Why is this necessary? (Copied from wxTextCtrl::SetInsertionPoint) |
| 418 | SendMessage(hEditWnd, EM_REPLACESEL, 0, (LPARAM)_T("")); |
| 419 | } |
| 420 | #endif // __WIN32__ |
| 421 | } |
| 422 | |
| 423 | void wxComboBox::SetInsertionPointEnd() |
| 424 | { |
| 425 | // setting insertion point doesn't make sense for read only comboboxes |
| 426 | if ( !(GetWindowStyle() & wxCB_READONLY) ) |
| 427 | { |
| 428 | long pos = GetLastPosition(); |
| 429 | SetInsertionPoint(pos); |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | long wxComboBox::GetInsertionPoint() const |
| 434 | { |
| 435 | #ifdef __WIN32__ |
| 436 | DWORD Pos=(DWORD)SendMessage(GetHwnd(), CB_GETEDITSEL, 0, 0L); |
| 437 | return Pos&0xFFFF; |
| 438 | #else |
| 439 | return 0; |
| 440 | #endif |
| 441 | } |
| 442 | |
| 443 | long wxComboBox::GetLastPosition() const |
| 444 | { |
| 445 | HWND hEditWnd = (HWND) GetEditHWND(); |
| 446 | |
| 447 | // Get number of characters in the last (only) line. We'll add this to the character |
| 448 | // index for the last line, 1st position. |
| 449 | int lineLength = (int)SendMessage(hEditWnd, EM_LINELENGTH, (WPARAM) 0, (LPARAM)0L); |
| 450 | |
| 451 | return (long)(lineLength); |
| 452 | } |
| 453 | |
| 454 | void wxComboBox::Replace(long from, long to, const wxString& value) |
| 455 | { |
| 456 | #if wxUSE_CLIPBOARD |
| 457 | Remove(from, to); |
| 458 | |
| 459 | // Now replace with 'value', by pasting. |
| 460 | wxSetClipboardData(wxDF_TEXT, (wxObject *)(const wxChar *)value, 0, 0); |
| 461 | |
| 462 | // Paste into edit control |
| 463 | SendMessage(GetHwnd(), WM_PASTE, (WPARAM)0, (LPARAM)0L); |
| 464 | #endif |
| 465 | } |
| 466 | |
| 467 | void wxComboBox::Remove(long from, long to) |
| 468 | { |
| 469 | // Set selection and remove it |
| 470 | SetSelection(from, to); |
| 471 | SendMessage(GetHwnd(), WM_CUT, (WPARAM)0, (LPARAM)0); |
| 472 | } |
| 473 | |
| 474 | void wxComboBox::SetSelection(long from, long to) |
| 475 | { |
| 476 | HWND hWnd = GetHwnd(); |
| 477 | long fromChar = from; |
| 478 | long toChar = to; |
| 479 | // if from and to are both -1, it means |
| 480 | // (in wxWindows) that all text should be selected. |
| 481 | // This translates into Windows convention |
| 482 | if ((from == -1) && (to == -1)) |
| 483 | { |
| 484 | fromChar = 0; |
| 485 | toChar = -1; |
| 486 | } |
| 487 | |
| 488 | if ( |
| 489 | #ifdef __WIN32__ |
| 490 | SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar)) |
| 491 | #else // Win16 |
| 492 | SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)fromChar, (LPARAM)toChar) |
| 493 | #endif |
| 494 | == CB_ERR ) |
| 495 | { |
| 496 | wxLogDebug(_T("CB_SETEDITSEL failed")); |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | #endif |
| 501 | // wxUSE_COMBOBOX |
| 502 | |