| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/univ/listbox.cpp |
| 3 | // Purpose: wxListBox implementation |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: 30.08.00 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 2000 SciTech Software, Inc. (www.scitechsoft.com) |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | #include "wx/wxprec.h" |
| 21 | |
| 22 | #ifdef __BORLANDC__ |
| 23 | #pragma hdrstop |
| 24 | #endif |
| 25 | |
| 26 | #if wxUSE_LISTBOX |
| 27 | |
| 28 | #ifndef WX_PRECOMP |
| 29 | #include "wx/log.h" |
| 30 | |
| 31 | #include "wx/dcclient.h" |
| 32 | #include "wx/listbox.h" |
| 33 | #include "wx/validate.h" |
| 34 | #endif |
| 35 | |
| 36 | #include "wx/univ/renderer.h" |
| 37 | #include "wx/univ/inphand.h" |
| 38 | #include "wx/univ/theme.h" |
| 39 | |
| 40 | // ---------------------------------------------------------------------------- |
| 41 | // wxStdListboxInputHandler: handles mouse and kbd in a single or multi |
| 42 | // selection listbox |
| 43 | // ---------------------------------------------------------------------------- |
| 44 | |
| 45 | class WXDLLEXPORT wxStdListboxInputHandler : public wxStdInputHandler |
| 46 | { |
| 47 | public: |
| 48 | // if pressing the mouse button in a multiselection listbox should toggle |
| 49 | // the item under mouse immediately, then specify true as the second |
| 50 | // parameter (this is the standard behaviour, under GTK the item is toggled |
| 51 | // only when the mouse is released in the multi selection listbox) |
| 52 | wxStdListboxInputHandler(wxInputHandler *inphand, |
| 53 | bool toggleOnPressAlways = true); |
| 54 | |
| 55 | // base class methods |
| 56 | virtual bool HandleKey(wxInputConsumer *consumer, |
| 57 | const wxKeyEvent& event, |
| 58 | bool pressed); |
| 59 | virtual bool HandleMouse(wxInputConsumer *consumer, |
| 60 | const wxMouseEvent& event); |
| 61 | virtual bool HandleMouseMove(wxInputConsumer *consumer, |
| 62 | const wxMouseEvent& event); |
| 63 | |
| 64 | protected: |
| 65 | // return the item under mouse, 0 if the mouse is above the listbox or |
| 66 | // GetCount() if it is below it |
| 67 | int HitTest(const wxListBox *listbox, const wxMouseEvent& event); |
| 68 | |
| 69 | // parts of HitTest(): first finds the pseudo (because not in range) index |
| 70 | // of the item and the second one adjusts it if necessary - that is if the |
| 71 | // third one returns false |
| 72 | int HitTestUnsafe(const wxListBox *listbox, const wxMouseEvent& event); |
| 73 | int FixItemIndex(const wxListBox *listbox, int item); |
| 74 | bool IsValidIndex(const wxListBox *listbox, int item); |
| 75 | |
| 76 | // init m_btnCapture and m_actionMouse |
| 77 | wxControlAction SetupCapture(wxListBox *lbox, |
| 78 | const wxMouseEvent& event, |
| 79 | int item); |
| 80 | |
| 81 | wxRenderer *m_renderer; |
| 82 | |
| 83 | // the button which initiated the mouse capture (currently 0 or 1) |
| 84 | int m_btnCapture; |
| 85 | |
| 86 | // the action to perform when the mouse moves while we capture it |
| 87 | wxControlAction m_actionMouse; |
| 88 | |
| 89 | // the ctor parameter toggleOnPressAlways (see comments near it) |
| 90 | bool m_toggleOnPressAlways; |
| 91 | |
| 92 | // do we track the mouse outside the window when it is captured? |
| 93 | bool m_trackMouseOutside; |
| 94 | }; |
| 95 | |
| 96 | // ============================================================================ |
| 97 | // implementation of wxListBox |
| 98 | // ============================================================================ |
| 99 | |
| 100 | IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControlWithItems) |
| 101 | |
| 102 | BEGIN_EVENT_TABLE(wxListBox, wxListBoxBase) |
| 103 | EVT_SIZE(wxListBox::OnSize) |
| 104 | END_EVENT_TABLE() |
| 105 | |
| 106 | // ---------------------------------------------------------------------------- |
| 107 | // construction |
| 108 | // ---------------------------------------------------------------------------- |
| 109 | |
| 110 | void wxListBox::Init() |
| 111 | { |
| 112 | // will be calculated later when needed |
| 113 | m_lineHeight = 0; |
| 114 | m_itemsPerPage = 0; |
| 115 | m_maxWidth = 0; |
| 116 | m_scrollRangeY = 0; |
| 117 | m_maxWidthItem = -1; |
| 118 | m_strings.unsorted = NULL; |
| 119 | |
| 120 | // no items hence no current item |
| 121 | m_current = -1; |
| 122 | m_selAnchor = -1; |
| 123 | m_currentChanged = false; |
| 124 | |
| 125 | // no need to update anything initially |
| 126 | m_updateCount = 0; |
| 127 | |
| 128 | // no scrollbars to show nor update |
| 129 | m_updateScrollbarX = |
| 130 | m_showScrollbarX = |
| 131 | m_updateScrollbarY = |
| 132 | m_showScrollbarY = false; |
| 133 | } |
| 134 | |
| 135 | wxListBox::wxListBox(wxWindow *parent, |
| 136 | wxWindowID id, |
| 137 | const wxPoint &pos, |
| 138 | const wxSize &size, |
| 139 | const wxArrayString& choices, |
| 140 | long style, |
| 141 | const wxValidator& validator, |
| 142 | const wxString &name) |
| 143 | :wxScrollHelper(this) |
| 144 | { |
| 145 | Init(); |
| 146 | |
| 147 | Create(parent, id, pos, size, choices, style, validator, name); |
| 148 | } |
| 149 | |
| 150 | bool wxListBox::Create(wxWindow *parent, |
| 151 | wxWindowID id, |
| 152 | const wxPoint &pos, |
| 153 | const wxSize &size, |
| 154 | const wxArrayString& choices, |
| 155 | long style, |
| 156 | const wxValidator& validator, |
| 157 | const wxString &name) |
| 158 | { |
| 159 | wxCArrayString chs(choices); |
| 160 | |
| 161 | return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(), |
| 162 | style, validator, name); |
| 163 | } |
| 164 | |
| 165 | bool wxListBox::Create(wxWindow *parent, |
| 166 | wxWindowID id, |
| 167 | const wxPoint &pos, |
| 168 | const wxSize &size, |
| 169 | int n, |
| 170 | const wxString choices[], |
| 171 | long style, |
| 172 | const wxValidator& validator, |
| 173 | const wxString &name) |
| 174 | { |
| 175 | // for compatibility accept both the new and old styles - they mean the |
| 176 | // same thing for us |
| 177 | if ( style & wxLB_ALWAYS_SB ) |
| 178 | style |= wxALWAYS_SHOW_SB; |
| 179 | |
| 180 | // if we don't have neither multiple nor extended flag, we must have the |
| 181 | // single selection listbox |
| 182 | if ( !(style & (wxLB_MULTIPLE | wxLB_EXTENDED)) ) |
| 183 | style |= wxLB_SINGLE; |
| 184 | |
| 185 | #if wxUSE_TWO_WINDOWS |
| 186 | style |= wxVSCROLL|wxHSCROLL; |
| 187 | if ((style & wxBORDER_MASK) == 0) |
| 188 | style |= wxBORDER_SUNKEN; |
| 189 | #endif |
| 190 | |
| 191 | if ( !wxControl::Create(parent, id, pos, size, style, |
| 192 | validator, name) ) |
| 193 | return false; |
| 194 | |
| 195 | if ( IsSorted() ) |
| 196 | m_strings.sorted = new wxSortedArrayString; |
| 197 | else |
| 198 | m_strings.unsorted = new wxArrayString; |
| 199 | |
| 200 | Set(n, choices); |
| 201 | |
| 202 | SetInitialSize(size); |
| 203 | |
| 204 | CreateInputHandler(wxINP_HANDLER_LISTBOX); |
| 205 | |
| 206 | return true; |
| 207 | } |
| 208 | |
| 209 | wxListBox::~wxListBox() |
| 210 | { |
| 211 | // call this just to free the client data -- and avoid leaking memory |
| 212 | DoClear(); |
| 213 | |
| 214 | if ( IsSorted() ) |
| 215 | delete m_strings.sorted; |
| 216 | else |
| 217 | delete m_strings.unsorted; |
| 218 | |
| 219 | m_strings.sorted = NULL; |
| 220 | } |
| 221 | |
| 222 | // ---------------------------------------------------------------------------- |
| 223 | // accessing strings |
| 224 | // ---------------------------------------------------------------------------- |
| 225 | |
| 226 | unsigned int wxListBox::GetCount() const |
| 227 | { |
| 228 | return IsSorted() ? m_strings.sorted->size() |
| 229 | : m_strings.unsorted->size(); |
| 230 | } |
| 231 | |
| 232 | wxString wxListBox::GetString(unsigned int n) const |
| 233 | { |
| 234 | return IsSorted() ? m_strings.sorted->Item(n) |
| 235 | : m_strings.unsorted->Item(n); |
| 236 | } |
| 237 | |
| 238 | int wxListBox::FindString(const wxString& s, bool bCase) const |
| 239 | { |
| 240 | return IsSorted() ? m_strings.sorted->Index(s, bCase) |
| 241 | : m_strings.unsorted->Index(s, bCase); |
| 242 | } |
| 243 | |
| 244 | // ---------------------------------------------------------------------------- |
| 245 | // adding/inserting strings |
| 246 | // ---------------------------------------------------------------------------- |
| 247 | |
| 248 | int wxListBox::DoInsertItems(const wxArrayStringsAdapter& items, |
| 249 | unsigned int pos, |
| 250 | void **clientData, |
| 251 | wxClientDataType type) |
| 252 | { |
| 253 | int idx = wxNOT_FOUND; |
| 254 | |
| 255 | const unsigned int numItems = items.GetCount(); |
| 256 | for ( unsigned int i = 0; i < numItems; ++i ) |
| 257 | { |
| 258 | const wxString& item = items[i]; |
| 259 | idx = IsSorted() ? m_strings.sorted->Add(item) |
| 260 | : (m_strings.unsorted->Insert(item, pos), pos++); |
| 261 | |
| 262 | m_itemsClientData.Insert(NULL, idx); |
| 263 | AssignNewItemClientData(idx, clientData, i, type); |
| 264 | |
| 265 | // call the wxCheckListBox hook |
| 266 | OnItemInserted(idx); |
| 267 | } |
| 268 | |
| 269 | // the number of items has changed so we might have to show the scrollbar |
| 270 | m_updateScrollbarY = true; |
| 271 | |
| 272 | // the max width also might have changed - just recalculate it instead of |
| 273 | // keeping track of it here, this is probably more efficient for a typical |
| 274 | // use pattern |
| 275 | RefreshHorzScrollbar(); |
| 276 | |
| 277 | // note that we have to refresh all the items after the ones we inserted, |
| 278 | // not just these items |
| 279 | RefreshFromItemToEnd(pos); |
| 280 | |
| 281 | return idx; |
| 282 | } |
| 283 | |
| 284 | void wxListBox::SetString(unsigned int n, const wxString& s) |
| 285 | { |
| 286 | wxCHECK_RET( !IsSorted(), _T("can't set string in sorted listbox") ); |
| 287 | |
| 288 | if ( IsSorted() ) |
| 289 | (*m_strings.sorted)[n] = s; |
| 290 | else |
| 291 | (*m_strings.unsorted)[n] = s; |
| 292 | |
| 293 | if ( HasHorzScrollbar() ) |
| 294 | { |
| 295 | // we need to update m_maxWidth as changing the string may cause the |
| 296 | // horz scrollbar [dis]appear |
| 297 | wxCoord width; |
| 298 | |
| 299 | GetTextExtent(s, &width, NULL); |
| 300 | |
| 301 | // it might have increased if the new string is long |
| 302 | if ( width > m_maxWidth ) |
| 303 | { |
| 304 | m_maxWidth = width; |
| 305 | m_maxWidthItem = n; |
| 306 | m_updateScrollbarX = true; |
| 307 | } |
| 308 | // or also decreased if the old string was the longest one |
| 309 | else if ( n == (unsigned int)m_maxWidthItem ) |
| 310 | { |
| 311 | RefreshHorzScrollbar(); |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | RefreshItem(n); |
| 316 | } |
| 317 | |
| 318 | // ---------------------------------------------------------------------------- |
| 319 | // removing strings |
| 320 | // ---------------------------------------------------------------------------- |
| 321 | |
| 322 | void wxListBox::DoClear() |
| 323 | { |
| 324 | if ( IsSorted() ) |
| 325 | m_strings.sorted->Clear(); |
| 326 | else |
| 327 | m_strings.unsorted->Clear(); |
| 328 | |
| 329 | m_itemsClientData.Clear(); |
| 330 | m_selections.Clear(); |
| 331 | |
| 332 | m_current = -1; |
| 333 | |
| 334 | m_updateScrollbarY = true; |
| 335 | |
| 336 | RefreshHorzScrollbar(); |
| 337 | |
| 338 | RefreshAll(); |
| 339 | } |
| 340 | |
| 341 | void wxListBox::DoDeleteOneItem(unsigned int n) |
| 342 | { |
| 343 | wxCHECK_RET( IsValid(n), |
| 344 | _T("invalid index in wxListBox::Delete") ); |
| 345 | |
| 346 | // do it before removing the index as otherwise the last item will not be |
| 347 | // refreshed (as GetCount() will be decremented) |
| 348 | RefreshFromItemToEnd(n); |
| 349 | |
| 350 | if ( IsSorted() ) |
| 351 | m_strings.sorted->RemoveAt(n); |
| 352 | else |
| 353 | m_strings.unsorted->RemoveAt(n); |
| 354 | |
| 355 | m_itemsClientData.RemoveAt(n); |
| 356 | |
| 357 | // when the item disappears we must not keep using its index |
| 358 | if ( (int)n == m_current ) |
| 359 | { |
| 360 | m_current = -1; |
| 361 | } |
| 362 | else if ( (int)n < m_current ) |
| 363 | { |
| 364 | m_current--; |
| 365 | } |
| 366 | //else: current item may stay |
| 367 | |
| 368 | // update the selections array: the indices of all seletected items after |
| 369 | // the one being deleted must change and the item itselfm ust be removed |
| 370 | int index = wxNOT_FOUND; |
| 371 | unsigned int count = m_selections.GetCount(); |
| 372 | for ( unsigned int item = 0; item < count; item++ ) |
| 373 | { |
| 374 | if ( m_selections[item] == (int)n ) |
| 375 | { |
| 376 | // remember to delete it later |
| 377 | index = item; |
| 378 | } |
| 379 | else if ( m_selections[item] > (int)n ) |
| 380 | { |
| 381 | // to account for the index shift |
| 382 | m_selections[item]--; |
| 383 | } |
| 384 | //else: nothing changed for this one |
| 385 | } |
| 386 | |
| 387 | if ( index != wxNOT_FOUND ) |
| 388 | { |
| 389 | m_selections.RemoveAt(index); |
| 390 | } |
| 391 | |
| 392 | // the number of items has changed, hence the scrollbar may disappear |
| 393 | m_updateScrollbarY = true; |
| 394 | |
| 395 | // finally, if the longest item was deleted the scrollbar may disappear |
| 396 | if ( (int)n == m_maxWidthItem ) |
| 397 | { |
| 398 | RefreshHorzScrollbar(); |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | // ---------------------------------------------------------------------------- |
| 403 | // client data handling |
| 404 | // ---------------------------------------------------------------------------- |
| 405 | |
| 406 | void wxListBox::DoSetItemClientData(unsigned int n, void* clientData) |
| 407 | { |
| 408 | m_itemsClientData[n] = clientData; |
| 409 | } |
| 410 | |
| 411 | void *wxListBox::DoGetItemClientData(unsigned int n) const |
| 412 | { |
| 413 | return m_itemsClientData[n]; |
| 414 | } |
| 415 | |
| 416 | // ---------------------------------------------------------------------------- |
| 417 | // selection |
| 418 | // ---------------------------------------------------------------------------- |
| 419 | |
| 420 | void wxListBox::DoSetSelection(int n, bool select) |
| 421 | { |
| 422 | if ( select ) |
| 423 | { |
| 424 | if ( n == wxNOT_FOUND ) |
| 425 | { |
| 426 | if ( !HasMultipleSelection() ) |
| 427 | { |
| 428 | // selecting wxNOT_FOUND is documented to deselect all items |
| 429 | DeselectAll(); |
| 430 | return; |
| 431 | } |
| 432 | } |
| 433 | else if ( m_selections.Index(n) == wxNOT_FOUND ) |
| 434 | { |
| 435 | if ( !HasMultipleSelection() ) |
| 436 | { |
| 437 | // selecting an item in a single selection listbox deselects |
| 438 | // all the others |
| 439 | DeselectAll(); |
| 440 | } |
| 441 | |
| 442 | m_selections.Add(n); |
| 443 | |
| 444 | RefreshItem(n); |
| 445 | } |
| 446 | //else: already selected |
| 447 | } |
| 448 | else // unselect |
| 449 | { |
| 450 | int index = m_selections.Index(n); |
| 451 | if ( index != wxNOT_FOUND ) |
| 452 | { |
| 453 | m_selections.RemoveAt(index); |
| 454 | |
| 455 | RefreshItem(n); |
| 456 | } |
| 457 | //else: not selected |
| 458 | } |
| 459 | |
| 460 | // sanity check: a single selection listbox can't have more than one item |
| 461 | // selected |
| 462 | wxASSERT_MSG( HasMultipleSelection() || (m_selections.GetCount() < 2), |
| 463 | _T("multiple selected items in single selection lbox?") ); |
| 464 | |
| 465 | if ( select ) |
| 466 | { |
| 467 | // the newly selected item becomes the current one |
| 468 | SetCurrentItem(n); |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | int wxListBox::GetSelection() const |
| 473 | { |
| 474 | wxCHECK_MSG( !HasMultipleSelection(), wxNOT_FOUND, |
| 475 | _T("use wxListBox::GetSelections for ths listbox") ); |
| 476 | |
| 477 | return m_selections.IsEmpty() ? wxNOT_FOUND : m_selections[0]; |
| 478 | } |
| 479 | |
| 480 | int wxCMPFUNC_CONV wxCompareInts(int *n, int *m) |
| 481 | { |
| 482 | return *n - *m; |
| 483 | } |
| 484 | |
| 485 | int wxListBox::GetSelections(wxArrayInt& selections) const |
| 486 | { |
| 487 | // always return sorted array to the user |
| 488 | selections = m_selections; |
| 489 | unsigned int count = m_selections.GetCount(); |
| 490 | |
| 491 | // don't call sort on an empty array |
| 492 | if ( count ) |
| 493 | { |
| 494 | selections.Sort(wxCompareInts); |
| 495 | } |
| 496 | |
| 497 | return count; |
| 498 | } |
| 499 | |
| 500 | // ---------------------------------------------------------------------------- |
| 501 | // refresh logic: we use delayed refreshing which allows to avoid multiple |
| 502 | // refreshes (and hence flicker) in case when several listbox items are |
| 503 | // added/deleted/changed subsequently |
| 504 | // ---------------------------------------------------------------------------- |
| 505 | |
| 506 | void wxListBox::RefreshFromItemToEnd(int from) |
| 507 | { |
| 508 | RefreshItems(from, GetCount() - from); |
| 509 | } |
| 510 | |
| 511 | void wxListBox::RefreshItems(int from, int count) |
| 512 | { |
| 513 | switch ( m_updateCount ) |
| 514 | { |
| 515 | case 0: |
| 516 | m_updateFrom = from; |
| 517 | m_updateCount = count; |
| 518 | break; |
| 519 | |
| 520 | case -1: |
| 521 | // we refresh everything anyhow |
| 522 | break; |
| 523 | |
| 524 | default: |
| 525 | // add these items to the others which we have to refresh |
| 526 | if ( m_updateFrom < from ) |
| 527 | { |
| 528 | count += from - m_updateFrom; |
| 529 | if ( m_updateCount < count ) |
| 530 | m_updateCount = count; |
| 531 | } |
| 532 | else // m_updateFrom >= from |
| 533 | { |
| 534 | int updateLast = wxMax(m_updateFrom + m_updateCount, |
| 535 | from + count); |
| 536 | m_updateFrom = from; |
| 537 | m_updateCount = updateLast - m_updateFrom; |
| 538 | } |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | void wxListBox::RefreshItem(int n) |
| 543 | { |
| 544 | switch ( m_updateCount ) |
| 545 | { |
| 546 | case 0: |
| 547 | // refresh this item only |
| 548 | m_updateFrom = n; |
| 549 | m_updateCount = 1; |
| 550 | break; |
| 551 | |
| 552 | case -1: |
| 553 | // we refresh everything anyhow |
| 554 | break; |
| 555 | |
| 556 | default: |
| 557 | // add this item to the others which we have to refresh |
| 558 | if ( m_updateFrom < n ) |
| 559 | { |
| 560 | if ( m_updateCount < n - m_updateFrom + 1 ) |
| 561 | m_updateCount = n - m_updateFrom + 1; |
| 562 | } |
| 563 | else // n <= m_updateFrom |
| 564 | { |
| 565 | m_updateCount += m_updateFrom - n; |
| 566 | m_updateFrom = n; |
| 567 | } |
| 568 | } |
| 569 | } |
| 570 | |
| 571 | void wxListBox::RefreshAll() |
| 572 | { |
| 573 | m_updateCount = -1; |
| 574 | } |
| 575 | |
| 576 | void wxListBox::RefreshHorzScrollbar() |
| 577 | { |
| 578 | m_maxWidth = 0; // recalculate it |
| 579 | m_updateScrollbarX = true; |
| 580 | } |
| 581 | |
| 582 | void wxListBox::UpdateScrollbars() |
| 583 | { |
| 584 | wxSize size = GetClientSize(); |
| 585 | |
| 586 | // is our height enough to show all items? |
| 587 | unsigned int nLines = GetCount(); |
| 588 | wxCoord lineHeight = GetLineHeight(); |
| 589 | bool showScrollbarY = (int)nLines*lineHeight > size.y; |
| 590 | |
| 591 | // check the width too if required |
| 592 | wxCoord charWidth, maxWidth; |
| 593 | bool showScrollbarX; |
| 594 | if ( HasHorzScrollbar() ) |
| 595 | { |
| 596 | charWidth = GetCharWidth(); |
| 597 | maxWidth = GetMaxWidth(); |
| 598 | showScrollbarX = maxWidth > size.x; |
| 599 | } |
| 600 | else // never show it |
| 601 | { |
| 602 | charWidth = maxWidth = 0; |
| 603 | showScrollbarX = false; |
| 604 | } |
| 605 | |
| 606 | // what should be the scrollbar range now? |
| 607 | int scrollRangeX = showScrollbarX |
| 608 | ? (maxWidth + charWidth - 1) / charWidth + 2 // FIXME |
| 609 | : 0; |
| 610 | int scrollRangeY = showScrollbarY |
| 611 | ? nLines + |
| 612 | (size.y % lineHeight + lineHeight - 1) / lineHeight |
| 613 | : 0; |
| 614 | |
| 615 | // reset scrollbars if something changed: either the visibility status |
| 616 | // or the range of a scrollbar which is shown |
| 617 | if ( (showScrollbarY != m_showScrollbarY) || |
| 618 | (showScrollbarX != m_showScrollbarX) || |
| 619 | (showScrollbarY && (scrollRangeY != m_scrollRangeY)) || |
| 620 | (showScrollbarX && (scrollRangeX != m_scrollRangeX)) ) |
| 621 | { |
| 622 | int x, y; |
| 623 | GetViewStart(&x, &y); |
| 624 | SetScrollbars(charWidth, lineHeight, |
| 625 | scrollRangeX, scrollRangeY, |
| 626 | x, y); |
| 627 | |
| 628 | m_showScrollbarX = showScrollbarX; |
| 629 | m_showScrollbarY = showScrollbarY; |
| 630 | |
| 631 | m_scrollRangeX = scrollRangeX; |
| 632 | m_scrollRangeY = scrollRangeY; |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | void wxListBox::UpdateItems() |
| 637 | { |
| 638 | // only refresh the items which must be refreshed |
| 639 | if ( m_updateCount == -1 ) |
| 640 | { |
| 641 | // refresh all |
| 642 | wxLogTrace(_T("listbox"), _T("Refreshing all")); |
| 643 | |
| 644 | Refresh(); |
| 645 | } |
| 646 | else |
| 647 | { |
| 648 | wxSize size = GetClientSize(); |
| 649 | wxRect rect; |
| 650 | rect.width = size.x; |
| 651 | rect.height = size.y; |
| 652 | rect.y += m_updateFrom*GetLineHeight(); |
| 653 | rect.height = m_updateCount*GetLineHeight(); |
| 654 | |
| 655 | // we don't need to calculate x position as we always refresh the |
| 656 | // entire line(s) |
| 657 | CalcScrolledPosition(0, rect.y, NULL, &rect.y); |
| 658 | |
| 659 | wxLogTrace(_T("listbox"), _T("Refreshing items %d..%d (%d-%d)"), |
| 660 | m_updateFrom, m_updateFrom + m_updateCount - 1, |
| 661 | rect.GetTop(), rect.GetBottom()); |
| 662 | |
| 663 | Refresh(true, &rect); |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | void wxListBox::OnInternalIdle() |
| 668 | { |
| 669 | if ( m_updateScrollbarY || m_updateScrollbarX ) |
| 670 | { |
| 671 | UpdateScrollbars(); |
| 672 | |
| 673 | m_updateScrollbarX = |
| 674 | m_updateScrollbarY = false; |
| 675 | } |
| 676 | |
| 677 | if ( m_currentChanged ) |
| 678 | { |
| 679 | DoEnsureVisible(m_current); |
| 680 | |
| 681 | m_currentChanged = false; |
| 682 | } |
| 683 | |
| 684 | if ( m_updateCount ) |
| 685 | { |
| 686 | UpdateItems(); |
| 687 | |
| 688 | m_updateCount = 0; |
| 689 | } |
| 690 | wxListBoxBase::OnInternalIdle(); |
| 691 | } |
| 692 | |
| 693 | // ---------------------------------------------------------------------------- |
| 694 | // drawing |
| 695 | // ---------------------------------------------------------------------------- |
| 696 | |
| 697 | wxBorder wxListBox::GetDefaultBorder() const |
| 698 | { |
| 699 | return wxBORDER_SUNKEN; |
| 700 | } |
| 701 | |
| 702 | void wxListBox::DoDraw(wxControlRenderer *renderer) |
| 703 | { |
| 704 | // adjust the DC to account for scrolling |
| 705 | wxDC& dc = renderer->GetDC(); |
| 706 | PrepareDC(dc); |
| 707 | dc.SetFont(GetFont()); |
| 708 | |
| 709 | // get the update rect |
| 710 | wxRect rectUpdate = GetUpdateClientRect(); |
| 711 | |
| 712 | int yTop, yBottom; |
| 713 | CalcUnscrolledPosition(0, rectUpdate.GetTop(), NULL, &yTop); |
| 714 | CalcUnscrolledPosition(0, rectUpdate.GetBottom(), NULL, &yBottom); |
| 715 | |
| 716 | // get the items which must be redrawn |
| 717 | wxCoord lineHeight = GetLineHeight(); |
| 718 | unsigned int itemFirst = yTop / lineHeight, |
| 719 | itemLast = (yBottom + lineHeight - 1) / lineHeight, |
| 720 | itemMax = GetCount(); |
| 721 | |
| 722 | if ( itemFirst >= itemMax ) |
| 723 | return; |
| 724 | |
| 725 | if ( itemLast > itemMax ) |
| 726 | itemLast = itemMax; |
| 727 | |
| 728 | // do draw them |
| 729 | wxLogTrace(_T("listbox"), _T("Repainting items %d..%d"), |
| 730 | itemFirst, itemLast); |
| 731 | |
| 732 | DoDrawRange(renderer, itemFirst, itemLast); |
| 733 | } |
| 734 | |
| 735 | void wxListBox::DoDrawRange(wxControlRenderer *renderer, |
| 736 | int itemFirst, int itemLast) |
| 737 | { |
| 738 | renderer->DrawItems(this, itemFirst, itemLast); |
| 739 | } |
| 740 | |
| 741 | // ---------------------------------------------------------------------------- |
| 742 | // size calculations |
| 743 | // ---------------------------------------------------------------------------- |
| 744 | |
| 745 | bool wxListBox::SetFont(const wxFont& font) |
| 746 | { |
| 747 | if ( !wxControl::SetFont(font) ) |
| 748 | return false; |
| 749 | |
| 750 | CalcItemsPerPage(); |
| 751 | |
| 752 | RefreshAll(); |
| 753 | |
| 754 | return true; |
| 755 | } |
| 756 | |
| 757 | void wxListBox::CalcItemsPerPage() |
| 758 | { |
| 759 | m_lineHeight = GetRenderer()->GetListboxItemHeight(GetCharHeight()); |
| 760 | m_itemsPerPage = GetClientSize().y / m_lineHeight; |
| 761 | } |
| 762 | |
| 763 | int wxListBox::GetItemsPerPage() const |
| 764 | { |
| 765 | if ( !m_itemsPerPage ) |
| 766 | { |
| 767 | wxConstCast(this, wxListBox)->CalcItemsPerPage(); |
| 768 | } |
| 769 | |
| 770 | return m_itemsPerPage; |
| 771 | } |
| 772 | |
| 773 | wxCoord wxListBox::GetLineHeight() const |
| 774 | { |
| 775 | if ( !m_lineHeight ) |
| 776 | { |
| 777 | wxConstCast(this, wxListBox)->CalcItemsPerPage(); |
| 778 | } |
| 779 | |
| 780 | return m_lineHeight; |
| 781 | } |
| 782 | |
| 783 | wxCoord wxListBox::GetMaxWidth() const |
| 784 | { |
| 785 | if ( m_maxWidth == 0 ) |
| 786 | { |
| 787 | wxListBox *self = wxConstCast(this, wxListBox); |
| 788 | wxCoord width; |
| 789 | unsigned int count = GetCount(); |
| 790 | for ( unsigned int n = 0; n < count; n++ ) |
| 791 | { |
| 792 | GetTextExtent(this->GetString(n), &width, NULL); |
| 793 | if ( width > m_maxWidth ) |
| 794 | { |
| 795 | self->m_maxWidth = width; |
| 796 | self->m_maxWidthItem = n; |
| 797 | } |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | return m_maxWidth; |
| 802 | } |
| 803 | |
| 804 | void wxListBox::OnSize(wxSizeEvent& event) |
| 805 | { |
| 806 | // recalculate the number of items per page |
| 807 | CalcItemsPerPage(); |
| 808 | |
| 809 | // the scrollbars might [dis]appear |
| 810 | m_updateScrollbarX = |
| 811 | m_updateScrollbarY = true; |
| 812 | |
| 813 | event.Skip(); |
| 814 | } |
| 815 | |
| 816 | void wxListBox::DoSetFirstItem(int n) |
| 817 | { |
| 818 | SetCurrentItem(n); |
| 819 | } |
| 820 | |
| 821 | void wxListBox::DoSetSize(int x, int y, |
| 822 | int width, int height, |
| 823 | int sizeFlags) |
| 824 | { |
| 825 | if ( GetWindowStyle() & wxLB_INT_HEIGHT ) |
| 826 | { |
| 827 | // we must round up the height to an entire number of rows |
| 828 | |
| 829 | // the client area must contain an int number of rows, so take borders |
| 830 | // into account |
| 831 | wxRect rectBorders = GetRenderer()->GetBorderDimensions(GetBorder()); |
| 832 | wxCoord hBorders = rectBorders.y + rectBorders.height; |
| 833 | |
| 834 | wxCoord hLine = GetLineHeight(); |
| 835 | height = ((height - hBorders + hLine - 1) / hLine)*hLine + hBorders; |
| 836 | } |
| 837 | |
| 838 | wxListBoxBase::DoSetSize(x, y, width, height, sizeFlags); |
| 839 | } |
| 840 | |
| 841 | wxSize wxListBox::DoGetBestClientSize() const |
| 842 | { |
| 843 | wxCoord width = 0, |
| 844 | height = 0; |
| 845 | |
| 846 | unsigned int count = GetCount(); |
| 847 | for ( unsigned int n = 0; n < count; n++ ) |
| 848 | { |
| 849 | wxCoord w,h; |
| 850 | GetTextExtent(this->GetString(n), &w, &h); |
| 851 | |
| 852 | if ( w > width ) |
| 853 | width = w; |
| 854 | if ( h > height ) |
| 855 | height = h; |
| 856 | } |
| 857 | |
| 858 | // if the listbox is empty, still give it some non zero (even if |
| 859 | // arbitrary) size - otherwise, leave small margin around the strings |
| 860 | if ( !width ) |
| 861 | width = 100; |
| 862 | else |
| 863 | width += 3*GetCharWidth(); |
| 864 | |
| 865 | if ( !height ) |
| 866 | height = GetCharHeight(); |
| 867 | |
| 868 | // we need the height of the entire listbox, not just of one line |
| 869 | height *= wxMax(count, 7); |
| 870 | |
| 871 | return wxSize(width, height); |
| 872 | } |
| 873 | |
| 874 | // ---------------------------------------------------------------------------- |
| 875 | // listbox actions |
| 876 | // ---------------------------------------------------------------------------- |
| 877 | |
| 878 | bool wxListBox::SendEvent(wxEventType type, int item) |
| 879 | { |
| 880 | wxCommandEvent event(type, m_windowId); |
| 881 | event.SetEventObject(this); |
| 882 | |
| 883 | // use the current item by default |
| 884 | if ( item == -1 ) |
| 885 | { |
| 886 | item = m_current; |
| 887 | } |
| 888 | |
| 889 | // client data and string parameters only make sense if we have an item |
| 890 | if ( item != -1 ) |
| 891 | { |
| 892 | if ( HasClientObjectData() ) |
| 893 | event.SetClientObject(GetClientObject(item)); |
| 894 | else if ( HasClientUntypedData() ) |
| 895 | event.SetClientData(GetClientData(item)); |
| 896 | |
| 897 | event.SetString(GetString(item)); |
| 898 | } |
| 899 | |
| 900 | event.SetInt(item); |
| 901 | |
| 902 | return GetEventHandler()->ProcessEvent(event); |
| 903 | } |
| 904 | |
| 905 | void wxListBox::SetCurrentItem(int n) |
| 906 | { |
| 907 | if ( n != m_current ) |
| 908 | { |
| 909 | if ( m_current != -1 ) |
| 910 | RefreshItem(m_current); |
| 911 | |
| 912 | m_current = n; |
| 913 | |
| 914 | if ( m_current != -1 ) |
| 915 | { |
| 916 | m_currentChanged = true; |
| 917 | |
| 918 | RefreshItem(m_current); |
| 919 | } |
| 920 | } |
| 921 | //else: nothing to do |
| 922 | } |
| 923 | |
| 924 | bool wxListBox::FindItem(const wxString& prefix, bool strictlyAfter) |
| 925 | { |
| 926 | unsigned int count = GetCount(); |
| 927 | if ( count==0 ) |
| 928 | { |
| 929 | // empty listbox, we can't find anything in it |
| 930 | return false; |
| 931 | } |
| 932 | |
| 933 | // start either from the current item or from the next one if strictlyAfter |
| 934 | // is true |
| 935 | int first; |
| 936 | if ( strictlyAfter ) |
| 937 | { |
| 938 | // the following line will set first correctly to 0 if there is no |
| 939 | // selection (m_current == -1) |
| 940 | first = m_current == (int)(count - 1) ? 0 : m_current + 1; |
| 941 | } |
| 942 | else // start with the current |
| 943 | { |
| 944 | first = m_current == -1 ? 0 : m_current; |
| 945 | } |
| 946 | |
| 947 | int last = first == 0 ? count - 1 : first - 1; |
| 948 | |
| 949 | // if this is not true we'd never exit from the loop below! |
| 950 | wxASSERT_MSG( first < (int)count && last < (int)count, _T("logic error") ); |
| 951 | |
| 952 | // precompute it outside the loop |
| 953 | size_t len = prefix.length(); |
| 954 | |
| 955 | // loop over all items in the listbox |
| 956 | for ( int item = first; item != (int)last; item < (int)(count - 1) ? item++ : item = 0 ) |
| 957 | { |
| 958 | if ( wxStrnicmp(this->GetString(item).c_str(), prefix, len) == 0 ) |
| 959 | { |
| 960 | SetCurrentItem(item); |
| 961 | |
| 962 | if ( !(GetWindowStyle() & wxLB_MULTIPLE) ) |
| 963 | { |
| 964 | DeselectAll(item); |
| 965 | SelectAndNotify(item); |
| 966 | |
| 967 | if ( GetWindowStyle() & wxLB_EXTENDED ) |
| 968 | AnchorSelection(item); |
| 969 | } |
| 970 | |
| 971 | return true; |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | // nothing found |
| 976 | return false; |
| 977 | } |
| 978 | |
| 979 | void wxListBox::EnsureVisible(int n) |
| 980 | { |
| 981 | if ( m_updateScrollbarY ) |
| 982 | { |
| 983 | UpdateScrollbars(); |
| 984 | |
| 985 | m_updateScrollbarX = |
| 986 | m_updateScrollbarY = false; |
| 987 | } |
| 988 | |
| 989 | DoEnsureVisible(n); |
| 990 | } |
| 991 | |
| 992 | void wxListBox::DoEnsureVisible(int n) |
| 993 | { |
| 994 | if ( !m_showScrollbarY ) |
| 995 | { |
| 996 | // nothing to do - everything is shown anyhow |
| 997 | return; |
| 998 | } |
| 999 | |
| 1000 | int first; |
| 1001 | GetViewStart(0, &first); |
| 1002 | if ( first > n ) |
| 1003 | { |
| 1004 | // we need to scroll upwards, so make the current item appear on top |
| 1005 | // of the shown range |
| 1006 | Scroll(0, n); |
| 1007 | } |
| 1008 | else |
| 1009 | { |
| 1010 | int last = first + GetClientSize().y / GetLineHeight() - 1; |
| 1011 | if ( last < n ) |
| 1012 | { |
| 1013 | // scroll down: the current item appears at the bottom of the |
| 1014 | // range |
| 1015 | Scroll(0, n - (last - first)); |
| 1016 | } |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | void wxListBox::ChangeCurrent(int diff) |
| 1021 | { |
| 1022 | int current = m_current == -1 ? 0 : m_current; |
| 1023 | |
| 1024 | current += diff; |
| 1025 | |
| 1026 | int last = GetCount() - 1; |
| 1027 | if ( current < 0 ) |
| 1028 | current = 0; |
| 1029 | else if ( current > last ) |
| 1030 | current = last; |
| 1031 | |
| 1032 | SetCurrentItem(current); |
| 1033 | } |
| 1034 | |
| 1035 | void wxListBox::ExtendSelection(int itemTo) |
| 1036 | { |
| 1037 | // if we don't have the explicit values for selection start/end, make them |
| 1038 | // up |
| 1039 | if ( m_selAnchor == -1 ) |
| 1040 | m_selAnchor = m_current; |
| 1041 | |
| 1042 | if ( itemTo == -1 ) |
| 1043 | itemTo = m_current; |
| 1044 | |
| 1045 | // swap the start/end of selection range if necessary |
| 1046 | int itemFrom = m_selAnchor; |
| 1047 | if ( itemFrom > itemTo ) |
| 1048 | { |
| 1049 | int itemTmp = itemFrom; |
| 1050 | itemFrom = itemTo; |
| 1051 | itemTo = itemTmp; |
| 1052 | } |
| 1053 | |
| 1054 | // the selection should now include all items in the range between the |
| 1055 | // anchor and the specified item and only them |
| 1056 | |
| 1057 | int n; |
| 1058 | for ( n = 0; n < itemFrom; n++ ) |
| 1059 | { |
| 1060 | Deselect(n); |
| 1061 | } |
| 1062 | |
| 1063 | for ( ; n <= itemTo; n++ ) |
| 1064 | { |
| 1065 | SetSelection(n); |
| 1066 | } |
| 1067 | |
| 1068 | unsigned int count = GetCount(); |
| 1069 | for ( ; n < (int)count; n++ ) |
| 1070 | { |
| 1071 | Deselect(n); |
| 1072 | } |
| 1073 | } |
| 1074 | |
| 1075 | void wxListBox::DoSelect(int item, bool sel) |
| 1076 | { |
| 1077 | if ( item != -1 ) |
| 1078 | { |
| 1079 | // go to this item first |
| 1080 | SetCurrentItem(item); |
| 1081 | } |
| 1082 | |
| 1083 | // the current item is the one we want to change: either it was just |
| 1084 | // changed above to be the same as item or item == -1 in which we case we |
| 1085 | // are supposed to use the current one anyhow |
| 1086 | if ( m_current != -1 ) |
| 1087 | { |
| 1088 | // [de]select it |
| 1089 | SetSelection(m_current, sel); |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | void wxListBox::SelectAndNotify(int item) |
| 1094 | { |
| 1095 | DoSelect(item); |
| 1096 | |
| 1097 | SendEvent(wxEVT_COMMAND_LISTBOX_SELECTED); |
| 1098 | } |
| 1099 | |
| 1100 | void wxListBox::Activate(int item) |
| 1101 | { |
| 1102 | if ( item != -1 ) |
| 1103 | SetCurrentItem(item); |
| 1104 | else |
| 1105 | item = m_current; |
| 1106 | |
| 1107 | if ( !(GetWindowStyle() & wxLB_MULTIPLE) ) |
| 1108 | { |
| 1109 | DeselectAll(item); |
| 1110 | } |
| 1111 | |
| 1112 | if ( item != -1 ) |
| 1113 | { |
| 1114 | DoSelect(item); |
| 1115 | |
| 1116 | SendEvent(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED); |
| 1117 | } |
| 1118 | } |
| 1119 | |
| 1120 | // ---------------------------------------------------------------------------- |
| 1121 | // input handling |
| 1122 | // ---------------------------------------------------------------------------- |
| 1123 | |
| 1124 | /* |
| 1125 | The numArg here is the listbox item index while the strArg is used |
| 1126 | differently for the different actions: |
| 1127 | |
| 1128 | a) for wxACTION_LISTBOX_FIND it has the natural meaning: this is the string |
| 1129 | to find |
| 1130 | |
| 1131 | b) for wxACTION_LISTBOX_SELECT and wxACTION_LISTBOX_EXTENDSEL it is used |
| 1132 | to decide if the listbox should send the notification event (it is empty) |
| 1133 | or not (it is not): this allows us to reuse the same action for when the |
| 1134 | user is dragging the mouse when it has been released although in the |
| 1135 | first case no notification is sent while in the second it is sent. |
| 1136 | */ |
| 1137 | bool wxListBox::PerformAction(const wxControlAction& action, |
| 1138 | long numArg, |
| 1139 | const wxString& strArg) |
| 1140 | { |
| 1141 | int item = (int)numArg; |
| 1142 | |
| 1143 | if ( action == wxACTION_LISTBOX_SETFOCUS ) |
| 1144 | { |
| 1145 | SetCurrentItem(item); |
| 1146 | } |
| 1147 | else if ( action == wxACTION_LISTBOX_ACTIVATE ) |
| 1148 | { |
| 1149 | Activate(item); |
| 1150 | } |
| 1151 | else if ( action == wxACTION_LISTBOX_TOGGLE ) |
| 1152 | { |
| 1153 | if ( item == -1 ) |
| 1154 | item = m_current; |
| 1155 | |
| 1156 | if ( IsSelected(item) ) |
| 1157 | DoUnselect(item); |
| 1158 | else |
| 1159 | SelectAndNotify(item); |
| 1160 | } |
| 1161 | else if ( action == wxACTION_LISTBOX_SELECT ) |
| 1162 | { |
| 1163 | DeselectAll(item); |
| 1164 | |
| 1165 | if ( strArg.empty() ) |
| 1166 | SelectAndNotify(item); |
| 1167 | else |
| 1168 | DoSelect(item); |
| 1169 | } |
| 1170 | else if ( action == wxACTION_LISTBOX_SELECTADD ) |
| 1171 | DoSelect(item); |
| 1172 | else if ( action == wxACTION_LISTBOX_UNSELECT ) |
| 1173 | DoUnselect(item); |
| 1174 | else if ( action == wxACTION_LISTBOX_MOVEDOWN ) |
| 1175 | ChangeCurrent(1); |
| 1176 | else if ( action == wxACTION_LISTBOX_MOVEUP ) |
| 1177 | ChangeCurrent(-1); |
| 1178 | else if ( action == wxACTION_LISTBOX_PAGEDOWN ) |
| 1179 | ChangeCurrent(GetItemsPerPage()); |
| 1180 | else if ( action == wxACTION_LISTBOX_PAGEUP ) |
| 1181 | ChangeCurrent(-GetItemsPerPage()); |
| 1182 | else if ( action == wxACTION_LISTBOX_START ) |
| 1183 | SetCurrentItem(0); |
| 1184 | else if ( action == wxACTION_LISTBOX_END ) |
| 1185 | SetCurrentItem(GetCount() - 1); |
| 1186 | else if ( action == wxACTION_LISTBOX_UNSELECTALL ) |
| 1187 | DeselectAll(item); |
| 1188 | else if ( action == wxACTION_LISTBOX_EXTENDSEL ) |
| 1189 | ExtendSelection(item); |
| 1190 | else if ( action == wxACTION_LISTBOX_FIND ) |
| 1191 | FindNextItem(strArg); |
| 1192 | else if ( action == wxACTION_LISTBOX_ANCHOR ) |
| 1193 | AnchorSelection(item == -1 ? m_current : item); |
| 1194 | else if ( action == wxACTION_LISTBOX_SELECTALL || |
| 1195 | action == wxACTION_LISTBOX_SELTOGGLE ) |
| 1196 | wxFAIL_MSG(_T("unimplemented yet")); |
| 1197 | else |
| 1198 | return wxControl::PerformAction(action, numArg, strArg); |
| 1199 | |
| 1200 | return true; |
| 1201 | } |
| 1202 | |
| 1203 | /* static */ |
| 1204 | wxInputHandler *wxListBox::GetStdInputHandler(wxInputHandler *handlerDef) |
| 1205 | { |
| 1206 | static wxStdListboxInputHandler s_handler(handlerDef); |
| 1207 | |
| 1208 | return &s_handler; |
| 1209 | } |
| 1210 | |
| 1211 | // ============================================================================ |
| 1212 | // implementation of wxStdListboxInputHandler |
| 1213 | // ============================================================================ |
| 1214 | |
| 1215 | wxStdListboxInputHandler::wxStdListboxInputHandler(wxInputHandler *handler, |
| 1216 | bool toggleOnPressAlways) |
| 1217 | : wxStdInputHandler(handler) |
| 1218 | { |
| 1219 | m_btnCapture = 0; |
| 1220 | m_toggleOnPressAlways = toggleOnPressAlways; |
| 1221 | m_actionMouse = wxACTION_NONE; |
| 1222 | m_trackMouseOutside = true; |
| 1223 | } |
| 1224 | |
| 1225 | int wxStdListboxInputHandler::HitTest(const wxListBox *lbox, |
| 1226 | const wxMouseEvent& event) |
| 1227 | { |
| 1228 | int item = HitTestUnsafe(lbox, event); |
| 1229 | |
| 1230 | return FixItemIndex(lbox, item); |
| 1231 | } |
| 1232 | |
| 1233 | int wxStdListboxInputHandler::HitTestUnsafe(const wxListBox *lbox, |
| 1234 | const wxMouseEvent& event) |
| 1235 | { |
| 1236 | wxPoint pt = event.GetPosition(); |
| 1237 | pt -= lbox->GetClientAreaOrigin(); |
| 1238 | int y; |
| 1239 | lbox->CalcUnscrolledPosition(0, pt.y, NULL, &y); |
| 1240 | return y / lbox->GetLineHeight(); |
| 1241 | } |
| 1242 | |
| 1243 | int wxStdListboxInputHandler::FixItemIndex(const wxListBox *lbox, |
| 1244 | int item) |
| 1245 | { |
| 1246 | if ( item < 0 ) |
| 1247 | { |
| 1248 | // mouse is above the first item |
| 1249 | item = 0; |
| 1250 | } |
| 1251 | else if ( (unsigned int)item >= lbox->GetCount() ) |
| 1252 | { |
| 1253 | // mouse is below the last item |
| 1254 | item = lbox->GetCount() - 1; |
| 1255 | } |
| 1256 | |
| 1257 | return item; |
| 1258 | } |
| 1259 | |
| 1260 | bool wxStdListboxInputHandler::IsValidIndex(const wxListBox *lbox, int item) |
| 1261 | { |
| 1262 | return item >= 0 && (unsigned int)item < lbox->GetCount(); |
| 1263 | } |
| 1264 | |
| 1265 | wxControlAction |
| 1266 | wxStdListboxInputHandler::SetupCapture(wxListBox *lbox, |
| 1267 | const wxMouseEvent& event, |
| 1268 | int item) |
| 1269 | { |
| 1270 | // we currently only allow selecting with the left mouse button, if we |
| 1271 | // do need to allow using other buttons too we might use the code |
| 1272 | // inside #if 0 |
| 1273 | #if 0 |
| 1274 | m_btnCapture = event.LeftDown() |
| 1275 | ? 1 |
| 1276 | : event.RightDown() |
| 1277 | ? 3 |
| 1278 | : 2; |
| 1279 | #else |
| 1280 | m_btnCapture = 1; |
| 1281 | #endif // 0/1 |
| 1282 | |
| 1283 | wxControlAction action; |
| 1284 | if ( lbox->HasMultipleSelection() ) |
| 1285 | { |
| 1286 | if ( lbox->GetWindowStyle() & wxLB_MULTIPLE ) |
| 1287 | { |
| 1288 | if ( m_toggleOnPressAlways ) |
| 1289 | { |
| 1290 | // toggle the item right now |
| 1291 | action = wxACTION_LISTBOX_TOGGLE; |
| 1292 | } |
| 1293 | //else: later |
| 1294 | |
| 1295 | m_actionMouse = wxACTION_LISTBOX_SETFOCUS; |
| 1296 | } |
| 1297 | else // wxLB_EXTENDED listbox |
| 1298 | { |
| 1299 | // simple click in an extended sel listbox clears the old |
| 1300 | // selection and adds the clicked item to it then, ctrl-click |
| 1301 | // toggles an item to it and shift-click adds a range between |
| 1302 | // the old selection anchor and the clicked item |
| 1303 | if ( event.ControlDown() ) |
| 1304 | { |
| 1305 | lbox->PerformAction(wxACTION_LISTBOX_ANCHOR, item); |
| 1306 | |
| 1307 | action = wxACTION_LISTBOX_TOGGLE; |
| 1308 | } |
| 1309 | else if ( event.ShiftDown() ) |
| 1310 | { |
| 1311 | action = wxACTION_LISTBOX_EXTENDSEL; |
| 1312 | } |
| 1313 | else // simple click |
| 1314 | { |
| 1315 | lbox->PerformAction(wxACTION_LISTBOX_ANCHOR, item); |
| 1316 | |
| 1317 | action = wxACTION_LISTBOX_SELECT; |
| 1318 | } |
| 1319 | |
| 1320 | m_actionMouse = wxACTION_LISTBOX_EXTENDSEL; |
| 1321 | } |
| 1322 | } |
| 1323 | else // single selection |
| 1324 | { |
| 1325 | m_actionMouse = |
| 1326 | action = wxACTION_LISTBOX_SELECT; |
| 1327 | } |
| 1328 | |
| 1329 | // by default we always do track it |
| 1330 | m_trackMouseOutside = true; |
| 1331 | |
| 1332 | return action; |
| 1333 | } |
| 1334 | |
| 1335 | bool wxStdListboxInputHandler::HandleKey(wxInputConsumer *consumer, |
| 1336 | const wxKeyEvent& event, |
| 1337 | bool pressed) |
| 1338 | { |
| 1339 | // we're only interested in the key press events |
| 1340 | if ( pressed && !event.AltDown() ) |
| 1341 | { |
| 1342 | bool isMoveCmd = true; |
| 1343 | int style = consumer->GetInputWindow()->GetWindowStyle(); |
| 1344 | |
| 1345 | wxControlAction action; |
| 1346 | wxString strArg; |
| 1347 | |
| 1348 | int keycode = event.GetKeyCode(); |
| 1349 | switch ( keycode ) |
| 1350 | { |
| 1351 | // movement |
| 1352 | case WXK_UP: |
| 1353 | action = wxACTION_LISTBOX_MOVEUP; |
| 1354 | break; |
| 1355 | |
| 1356 | case WXK_DOWN: |
| 1357 | action = wxACTION_LISTBOX_MOVEDOWN; |
| 1358 | break; |
| 1359 | |
| 1360 | case WXK_PAGEUP: |
| 1361 | action = wxACTION_LISTBOX_PAGEUP; |
| 1362 | break; |
| 1363 | |
| 1364 | case WXK_PAGEDOWN: |
| 1365 | action = wxACTION_LISTBOX_PAGEDOWN; |
| 1366 | break; |
| 1367 | |
| 1368 | case WXK_HOME: |
| 1369 | action = wxACTION_LISTBOX_START; |
| 1370 | break; |
| 1371 | |
| 1372 | case WXK_END: |
| 1373 | action = wxACTION_LISTBOX_END; |
| 1374 | break; |
| 1375 | |
| 1376 | // selection |
| 1377 | case WXK_SPACE: |
| 1378 | if ( style & wxLB_MULTIPLE ) |
| 1379 | { |
| 1380 | action = wxACTION_LISTBOX_TOGGLE; |
| 1381 | isMoveCmd = false; |
| 1382 | } |
| 1383 | break; |
| 1384 | |
| 1385 | case WXK_RETURN: |
| 1386 | action = wxACTION_LISTBOX_ACTIVATE; |
| 1387 | isMoveCmd = false; |
| 1388 | break; |
| 1389 | |
| 1390 | default: |
| 1391 | if ( (keycode < 255) && wxIsalnum((wxChar)keycode) ) |
| 1392 | { |
| 1393 | action = wxACTION_LISTBOX_FIND; |
| 1394 | strArg = (wxChar)keycode; |
| 1395 | } |
| 1396 | } |
| 1397 | |
| 1398 | if ( !action.IsEmpty() ) |
| 1399 | { |
| 1400 | consumer->PerformAction(action, -1, strArg); |
| 1401 | |
| 1402 | if ( isMoveCmd ) |
| 1403 | { |
| 1404 | if ( style & wxLB_SINGLE ) |
| 1405 | { |
| 1406 | // the current item is always the one selected |
| 1407 | consumer->PerformAction(wxACTION_LISTBOX_SELECT); |
| 1408 | } |
| 1409 | else if ( style & wxLB_EXTENDED ) |
| 1410 | { |
| 1411 | if ( event.ShiftDown() ) |
| 1412 | consumer->PerformAction(wxACTION_LISTBOX_EXTENDSEL); |
| 1413 | else |
| 1414 | { |
| 1415 | // select the item and make it the new selection anchor |
| 1416 | consumer->PerformAction(wxACTION_LISTBOX_SELECT); |
| 1417 | consumer->PerformAction(wxACTION_LISTBOX_ANCHOR); |
| 1418 | } |
| 1419 | } |
| 1420 | //else: nothing to do for multiple selection listboxes |
| 1421 | } |
| 1422 | |
| 1423 | return true; |
| 1424 | } |
| 1425 | } |
| 1426 | |
| 1427 | return wxStdInputHandler::HandleKey(consumer, event, pressed); |
| 1428 | } |
| 1429 | |
| 1430 | bool wxStdListboxInputHandler::HandleMouse(wxInputConsumer *consumer, |
| 1431 | const wxMouseEvent& event) |
| 1432 | { |
| 1433 | wxListBox *lbox = wxStaticCast(consumer->GetInputWindow(), wxListBox); |
| 1434 | int item = HitTest(lbox, event); |
| 1435 | wxControlAction action; |
| 1436 | |
| 1437 | // when the left mouse button is pressed, capture the mouse and track the |
| 1438 | // item under mouse (if the mouse leaves the window, we will still be |
| 1439 | // getting the mouse move messages generated by wxScrollWindow) |
| 1440 | if ( event.LeftDown() ) |
| 1441 | { |
| 1442 | // capture the mouse to track the selected item |
| 1443 | lbox->CaptureMouse(); |
| 1444 | |
| 1445 | action = SetupCapture(lbox, event, item); |
| 1446 | } |
| 1447 | else if ( m_btnCapture && event.ButtonUp(m_btnCapture) ) |
| 1448 | { |
| 1449 | // when the left mouse button is released, release the mouse too |
| 1450 | wxWindow *winCapture = wxWindow::GetCapture(); |
| 1451 | if ( winCapture ) |
| 1452 | { |
| 1453 | winCapture->ReleaseMouse(); |
| 1454 | m_btnCapture = 0; |
| 1455 | |
| 1456 | action = m_actionMouse; |
| 1457 | } |
| 1458 | //else: the mouse wasn't presed over the listbox, only released here |
| 1459 | } |
| 1460 | else if ( event.LeftDClick() ) |
| 1461 | { |
| 1462 | action = wxACTION_LISTBOX_ACTIVATE; |
| 1463 | } |
| 1464 | |
| 1465 | if ( !action.IsEmpty() ) |
| 1466 | { |
| 1467 | lbox->PerformAction(action, item); |
| 1468 | |
| 1469 | return true; |
| 1470 | } |
| 1471 | |
| 1472 | return wxStdInputHandler::HandleMouse(consumer, event); |
| 1473 | } |
| 1474 | |
| 1475 | bool wxStdListboxInputHandler::HandleMouseMove(wxInputConsumer *consumer, |
| 1476 | const wxMouseEvent& event) |
| 1477 | { |
| 1478 | wxWindow *winCapture = wxWindow::GetCapture(); |
| 1479 | if ( winCapture && (event.GetEventObject() == winCapture) ) |
| 1480 | { |
| 1481 | wxListBox *lbox = wxStaticCast(consumer->GetInputWindow(), wxListBox); |
| 1482 | |
| 1483 | if ( !m_btnCapture || !m_trackMouseOutside ) |
| 1484 | { |
| 1485 | // someone captured the mouse for us (we always set m_btnCapture |
| 1486 | // when we do it ourselves): in this case we only react to |
| 1487 | // the mouse messages when they happen inside the listbox |
| 1488 | if ( lbox->HitTest(event.GetPosition()) != wxHT_WINDOW_INSIDE ) |
| 1489 | return false; |
| 1490 | } |
| 1491 | |
| 1492 | int item = HitTest(lbox, event); |
| 1493 | if ( !m_btnCapture ) |
| 1494 | { |
| 1495 | // now that we have the mouse inside the listbox, do capture it |
| 1496 | // normally - but ensure that we will still ignore the outside |
| 1497 | // events |
| 1498 | SetupCapture(lbox, event, item); |
| 1499 | |
| 1500 | m_trackMouseOutside = false; |
| 1501 | } |
| 1502 | |
| 1503 | if ( IsValidIndex(lbox, item) ) |
| 1504 | { |
| 1505 | // pass something into strArg to tell the listbox that it shouldn't |
| 1506 | // send the notification message: see PerformAction() above |
| 1507 | lbox->PerformAction(m_actionMouse, item, _T("no")); |
| 1508 | } |
| 1509 | // else: don't pass invalid index to the listbox |
| 1510 | } |
| 1511 | else // we don't have capture any more |
| 1512 | { |
| 1513 | if ( m_btnCapture ) |
| 1514 | { |
| 1515 | // if we lost capture unexpectedly (someone else took the capture |
| 1516 | // from us), return to a consistent state |
| 1517 | m_btnCapture = 0; |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | return wxStdInputHandler::HandleMouseMove(consumer, event); |
| 1522 | } |
| 1523 | |
| 1524 | #endif // wxUSE_LISTBOX |