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1///////////////////////////////////////////////////////////////////////////////
2// Name: listbox.cpp
3// Purpose: wxListBox
4// Author: Julian Smart
5// Modified by: Vadim Zeitlin (owner drawn stuff)
6// Created:
7// RCS-ID: $Id$
8// Copyright: (c) Julian Smart
9// Licence: wxWindows license
10///////////////////////////////////////////////////////////////////////////////
11
12#ifdef __GNUG__
13 #pragma implementation "listbox.h"
14#endif
15
16// For compilers that support precompilation, includes "wx.h".
17#include "wx/wxprec.h"
18
19#ifdef __BORLANDC__
20 #pragma hdrstop
21#endif
22
23#include "wx/window.h"
24#include "wx/msw/private.h"
25
26#ifndef WX_PRECOMP
27#include "wx/listbox.h"
28#include "wx/settings.h"
29#include "wx/brush.h"
30#include "wx/font.h"
31#include "wx/dc.h"
32#include "wx/utils.h"
33#endif
34
35#include <windowsx.h>
36
37#ifdef __WXWINE__
38 #if defined(GetWindowStyle)
39 #undef GetWindowStyle
40 #endif
41#endif
42
43#include "wx/dynarray.h"
44#include "wx/log.h"
45
46#if wxUSE_OWNER_DRAWN
47 #include "wx/ownerdrw.h"
48#endif
49
50#ifndef __TWIN32__
51 #ifdef __GNUWIN32_OLD__
52 #include "wx/msw/gnuwin32/extra.h"
53 #endif
54#endif
55
56#ifdef __WXWINE__
57 #ifndef ListBox_SetItemData
58 #define ListBox_SetItemData(hwndCtl, index, data) \
59 ((int)(DWORD)SendMessage((hwndCtl), LB_SETITEMDATA, (WPARAM)(int)(index), (LPARAM)(data)))
60 #endif
61 #ifndef ListBox_GetHorizontalExtent
62 #define ListBox_GetHorizontalExtent(hwndCtl) \
63 ((int)(DWORD)SendMessage((hwndCtl), LB_GETHORIZONTALEXTENT, 0L, 0L))
64 #endif
65 #ifndef ListBox_GetSelCount
66 #define ListBox_GetSelCount(hwndCtl) \
67 ((int)(DWORD)SendMessage((hwndCtl), LB_GETSELCOUNT, 0L, 0L))
68 #endif
69 #ifndef ListBox_GetSelItems
70 #define ListBox_GetSelItems(hwndCtl, cItems, lpItems) \
71 ((int)(DWORD)SendMessage((hwndCtl), LB_GETSELITEMS, (WPARAM)(int)(cItems), (LPARAM)(int *)(lpItems)))
72 #endif
73 #ifndef ListBox_GetTextLen
74 #define ListBox_GetTextLen(hwndCtl, index) \
75 ((int)(DWORD)SendMessage((hwndCtl), LB_GETTEXTLEN, (WPARAM)(int)(index), 0L))
76 #endif
77 #ifndef ListBox_GetText
78 #define ListBox_GetText(hwndCtl, index, lpszBuffer) \
79 ((int)(DWORD)SendMessage((hwndCtl), LB_GETTEXT, (WPARAM)(int)(index), (LPARAM)(LPCTSTR)(lpszBuffer)))
80 #endif
81#endif
82
83 IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
84
85// ============================================================================
86// list box item declaration and implementation
87// ============================================================================
88
89#if wxUSE_OWNER_DRAWN
90
91class wxListBoxItem : public wxOwnerDrawn
92{
93public:
94 wxListBoxItem(const wxString& str = "");
95};
96
97wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, FALSE)
98{
99 // no bitmaps/checkmarks
100 SetMarginWidth(0);
101}
102
103wxOwnerDrawn *wxListBox::CreateItem(size_t n)
104{
105 return new wxListBoxItem();
106}
107
108#endif //USE_OWNER_DRAWN
109
110// ============================================================================
111// list box control implementation
112// ============================================================================
113
114// ----------------------------------------------------------------------------
115// creation
116// ----------------------------------------------------------------------------
117
118// Listbox item
119wxListBox::wxListBox()
120{
121 m_noItems = 0;
122 m_selected = 0;
123}
124
125bool wxListBox::Create(wxWindow *parent,
126 wxWindowID id,
127 const wxPoint& pos,
128 const wxSize& size,
129 int n, const wxString choices[],
130 long style,
131 const wxValidator& validator,
132 const wxString& name)
133{
134 m_noItems = 0;
135 m_hWnd = 0;
136 m_selected = 0;
137
138 SetName(name);
139#if wxUSE_VALIDATORS
140 SetValidator(validator);
141#endif // wxUSE_VALIDATORS
142
143 if (parent)
144 parent->AddChild(this);
145
146 wxSystemSettings settings;
147 SetBackgroundColour(settings.GetSystemColour(wxSYS_COLOUR_WINDOW));
148 SetForegroundColour(parent->GetForegroundColour());
149
150 m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
151
152 int x = pos.x;
153 int y = pos.y;
154 int width = size.x;
155 int height = size.y;
156 m_windowStyle = style;
157
158 DWORD wstyle = WS_VISIBLE | WS_VSCROLL | WS_TABSTOP |
159 LBS_NOTIFY | LBS_HASSTRINGS /* | WS_CLIPSIBLINGS */;
160 if (m_windowStyle & wxLB_MULTIPLE)
161 wstyle |= LBS_MULTIPLESEL;
162 else if (m_windowStyle & wxLB_EXTENDED)
163 wstyle |= LBS_EXTENDEDSEL;
164
165 if (m_windowStyle & wxLB_ALWAYS_SB)
166 wstyle |= LBS_DISABLENOSCROLL;
167 if (m_windowStyle & wxLB_HSCROLL)
168 wstyle |= WS_HSCROLL;
169 if (m_windowStyle & wxLB_SORT)
170 wstyle |= LBS_SORT;
171
172#if wxUSE_OWNER_DRAWN
173 if ( m_windowStyle & wxLB_OWNERDRAW ) {
174 // we don't support LBS_OWNERDRAWVARIABLE yet
175 wstyle |= LBS_OWNERDRAWFIXED;
176 }
177#endif
178
179 // Without this style, you get unexpected heights, so e.g. constraint layout
180 // doesn't work properly
181 wstyle |= LBS_NOINTEGRALHEIGHT;
182
183 bool want3D;
184 WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
185
186 // Even with extended styles, need to combine with WS_BORDER for them to
187 // look right.
188 if ( want3D || wxStyleHasBorder(m_windowStyle) )
189 {
190 wstyle |= WS_BORDER;
191 }
192
193 m_hWnd = (WXHWND)::CreateWindowEx(exStyle, wxT("LISTBOX"), NULL,
194 wstyle | WS_CHILD,
195 0, 0, 0, 0,
196 (HWND)parent->GetHWND(), (HMENU)m_windowId,
197 wxGetInstance(), NULL);
198
199 wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create listbox") );
200
201#if wxUSE_CTL3D
202 if (want3D)
203 {
204 Ctl3dSubclassCtl(GetHwnd());
205 m_useCtl3D = TRUE;
206 }
207#endif
208
209 // Subclass again to catch messages
210 SubclassWin(m_hWnd);
211
212 size_t ui;
213 for (ui = 0; ui < (size_t)n; ui++) {
214 Append(choices[ui]);
215 }
216
217 if ( (m_windowStyle & wxLB_MULTIPLE) == 0 )
218 SendMessage(GetHwnd(), LB_SETCURSEL, 0, 0);
219
220 SetFont(parent->GetFont());
221
222 SetSize(x, y, width, height);
223
224 return TRUE;
225}
226
227wxListBox::~wxListBox()
228{
229 Free();
230}
231
232void wxListBox::SetupColours()
233{
234 SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
235 SetForegroundColour(GetParent()->GetForegroundColour());
236}
237
238// ----------------------------------------------------------------------------
239// implementation of wxListBoxBase methods
240// ----------------------------------------------------------------------------
241
242void wxListBox::DoSetFirstItem(int N)
243{
244 wxCHECK_RET( N >= 0 && N < m_noItems,
245 wxT("invalid index in wxListBox::SetFirstItem") );
246
247 SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
248}
249
250void wxListBox::Delete(int N)
251{
252 wxCHECK_RET( N >= 0 && N < m_noItems,
253 wxT("invalid index in wxListBox::Delete") );
254
255 // for owner drawn objects, the data is used for storing wxOwnerDrawn
256 // pointers and we shouldn't touch it
257#if !wxUSE_OWNER_DRAWN
258 if ( !(m_windowStyle & wxLB_OWNERDRAW) )
259#endif // !wxUSE_OWNER_DRAWN
260 if ( HasClientObjectData() )
261 {
262 delete GetClientObject(N);
263 }
264
265 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
266 m_noItems--;
267
268 SetHorizontalExtent("");
269}
270
271int wxListBox::DoAppend(const wxString& item)
272{
273 int index = ListBox_AddString(GetHwnd(), item);
274 m_noItems++;
275
276#if wxUSE_OWNER_DRAWN
277 if ( m_windowStyle & wxLB_OWNERDRAW ) {
278 wxOwnerDrawn *pNewItem = CreateItem(index); // dummy argument
279 pNewItem->SetName(item);
280 m_aItems.Add(pNewItem);
281 ListBox_SetItemData(GetHwnd(), index, pNewItem);
282 pNewItem->SetFont(GetFont());
283 }
284#endif
285
286 SetHorizontalExtent(item);
287
288 return index;
289}
290
291void wxListBox::DoSetItems(const wxArrayString& choices, void** clientData)
292{
293 // avoid flicker - but don't need to do this for a hidden listbox
294 bool hideAndShow = IsShown();
295 if ( hideAndShow )
296 {
297 ShowWindow(GetHwnd(), SW_HIDE);
298 }
299
300 ListBox_ResetContent(GetHwnd());
301
302 m_noItems = choices.GetCount();
303 int i;
304 for (i = 0; i < m_noItems; i++)
305 {
306 ListBox_AddString(GetHwnd(), choices[i]);
307 if ( clientData )
308 {
309#if wxUSE_OWNER_DRAWN
310 if ( m_windowStyle & wxLB_OWNERDRAW )
311 {
312 wxASSERT_MSG(clientData[i] == NULL,
313 wxT("Can't use client data with owner-drawn listboxes"));
314 }
315 ListBox_SetItemData(GetHwnd(), i, clientData[i]);
316#else // !wxUSE_OWNER_DRAWN
317 ListBox_SetItemData(GetHwnd(), i, clientData[i]);
318#endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
319 }
320 }
321
322#if wxUSE_OWNER_DRAWN
323 if ( m_windowStyle & wxLB_OWNERDRAW ) {
324 // first delete old items
325 size_t ui = m_aItems.Count();
326 while ( ui-- != 0 ) {
327 delete m_aItems[ui];
328 }
329 m_aItems.Empty();
330
331 // then create new ones
332 for ( ui = 0; ui < (size_t)m_noItems; ui++ ) {
333 wxOwnerDrawn *pNewItem = CreateItem(ui);
334 pNewItem->SetName(choices[ui]);
335 m_aItems.Add(pNewItem);
336 ListBox_SetItemData(GetHwnd(), ui, pNewItem);
337 }
338 }
339#endif // wxUSE_OWNER_DRAWN
340
341 SetHorizontalExtent();
342
343 if ( hideAndShow )
344 {
345 // show the listbox back if we hid it
346 ShowWindow(GetHwnd(), SW_SHOW);
347 }
348}
349
350int wxListBox::FindString(const wxString& s) const
351{
352 int pos = ListBox_FindStringExact(GetHwnd(), (WPARAM)-1, s);
353 if (pos == LB_ERR)
354 return wxNOT_FOUND;
355 else
356 return pos;
357}
358
359void wxListBox::Clear()
360{
361 Free();
362
363 ListBox_ResetContent(GetHwnd());
364
365 m_noItems = 0;
366 SetHorizontalExtent();
367}
368
369void wxListBox::Free()
370{
371#if wxUSE_OWNER_DRAWN
372 if ( m_windowStyle & wxLB_OWNERDRAW )
373 {
374 size_t uiCount = m_aItems.Count();
375 while ( uiCount-- != 0 ) {
376 delete m_aItems[uiCount];
377 }
378
379 m_aItems.Clear();
380 }
381 else
382#endif // wxUSE_OWNER_DRAWN
383 if ( HasClientObjectData() )
384 {
385 for ( size_t n = 0; n < (size_t)m_noItems; n++ )
386 {
387 delete GetClientObject(n);
388 }
389 }
390}
391
392void wxListBox::SetSelection(int N, bool select)
393{
394 wxCHECK_RET( N >= 0 && N < m_noItems,
395 wxT("invalid index in wxListBox::SetSelection") );
396
397 if ( HasMultipleSelection() )
398 {
399 SendMessage(GetHwnd(), LB_SETSEL, select, N);
400 }
401 else
402 {
403 SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
404 }
405}
406
407bool wxListBox::IsSelected(int N) const
408{
409 wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
410 wxT("invalid index in wxListBox::Selected") );
411
412 return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
413}
414
415wxClientData* wxListBox::DoGetItemClientObject(int n) const
416{
417 return (wxClientData *)DoGetItemClientData(n);
418}
419
420void *wxListBox::DoGetItemClientData(int n) const
421{
422 wxCHECK_MSG( n >= 0 && n < m_noItems, NULL,
423 wxT("invalid index in wxListBox::GetClientData") );
424
425 return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
426}
427
428void wxListBox::DoSetItemClientObject(int n, wxClientData* clientData)
429{
430 DoSetItemClientData(n, clientData);
431}
432
433void wxListBox::DoSetItemClientData(int n, void *clientData)
434{
435 wxCHECK_RET( n >= 0 && n < m_noItems,
436 wxT("invalid index in wxListBox::SetClientData") );
437
438#if wxUSE_OWNER_DRAWN
439 if ( m_windowStyle & wxLB_OWNERDRAW )
440 {
441 // client data must be pointer to wxOwnerDrawn, otherwise we would crash
442 // in OnMeasure/OnDraw.
443 wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
444 }
445#endif // wxUSE_OWNER_DRAWN
446
447 if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
448 wxLogDebug(wxT("LB_SETITEMDATA failed"));
449}
450
451bool wxListBox::HasMultipleSelection() const
452{
453 return (m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED);
454}
455
456// Return number of selections and an array of selected integers
457int wxListBox::GetSelections(wxArrayInt& aSelections) const
458{
459 aSelections.Empty();
460
461 if ( HasMultipleSelection() )
462 {
463 int no_sel = ListBox_GetSelCount(GetHwnd());
464 if (no_sel != 0) {
465 int *selections = new int[no_sel];
466 int rc = ListBox_GetSelItems(GetHwnd(), no_sel, selections);
467
468 wxCHECK_MSG(rc != LB_ERR, -1, wxT("ListBox_GetSelItems failed"));
469
470 aSelections.Alloc(no_sel);
471 for ( int n = 0; n < no_sel; n++ )
472 aSelections.Add(selections[n]);
473
474 delete [] selections;
475 }
476
477 return no_sel;
478 }
479 else // single-selection listbox
480 {
481 if (ListBox_GetCurSel(GetHwnd()) > -1)
482 aSelections.Add(ListBox_GetCurSel(GetHwnd()));
483
484 return aSelections.Count();
485 }
486}
487
488// Get single selection, for single choice list items
489int wxListBox::GetSelection() const
490{
491 wxCHECK_MSG( !HasMultipleSelection(),
492 -1,
493 wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") );
494
495 return ListBox_GetCurSel(GetHwnd());
496}
497
498// Find string for position
499wxString wxListBox::GetString(int N) const
500{
501 wxCHECK_MSG( N >= 0 && N < m_noItems, "",
502 wxT("invalid index in wxListBox::GetClientData") );
503
504 int len = ListBox_GetTextLen(GetHwnd(), N);
505
506 // +1 for terminating NUL
507 wxString result;
508 ListBox_GetText(GetHwnd(), N, result.GetWriteBuf(len + 1));
509 result.UngetWriteBuf();
510
511 return result;
512}
513
514void
515wxListBox::DoInsertItems(const wxArrayString& items, int pos)
516{
517 wxCHECK_RET( pos >= 0 && pos <= m_noItems,
518 wxT("invalid index in wxListBox::InsertItems") );
519
520 int nItems = items.GetCount();
521 for ( int i = 0; i < nItems; i++ )
522 ListBox_InsertString(GetHwnd(), i + pos, items[i]);
523 m_noItems += nItems;
524
525 SetHorizontalExtent();
526}
527
528void wxListBox::SetString(int N, const wxString& s)
529{
530 wxCHECK_RET( N >= 0 && N < m_noItems,
531 wxT("invalid index in wxListBox::SetString") );
532
533 // remember the state of the item
534 bool wasSelected = IsSelected(N);
535
536 void *oldData = NULL;
537 wxClientData *oldObjData = NULL;
538 if ( m_clientDataItemsType == ClientData_Void )
539 oldData = GetClientData(N);
540 else if ( m_clientDataItemsType == ClientData_Object )
541 oldObjData = GetClientObject(N);
542
543 // delete and recreate it
544 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
545
546 int newN = N;
547 if ( N == m_noItems - 1 )
548 newN = -1;
549
550 ListBox_InsertString(GetHwnd(), newN, s);
551
552 // restore the client data
553 if ( oldData )
554 SetClientData(N, oldData);
555 else if ( oldObjData )
556 SetClientObject(N, oldObjData);
557
558 // we may have lost the selection
559 if ( wasSelected )
560 Select(N);
561
562#if wxUSE_OWNER_DRAWN
563 if ( m_windowStyle & wxLB_OWNERDRAW )
564 // update item's text
565 m_aItems[N]->SetName(s);
566#endif //USE_OWNER_DRAWN
567}
568
569int wxListBox::GetCount() const
570{
571 return m_noItems;
572}
573
574// ----------------------------------------------------------------------------
575// helpers
576// ----------------------------------------------------------------------------
577
578// Windows-specific code to set the horizontal extent of the listbox, if
579// necessary. If s is non-NULL, it's used to calculate the horizontal extent.
580// Otherwise, all strings are used.
581void wxListBox::SetHorizontalExtent(const wxString& s)
582{
583 // Only necessary if we want a horizontal scrollbar
584 if (!(m_windowStyle & wxHSCROLL))
585 return;
586 TEXTMETRIC lpTextMetric;
587
588 if ( !s.IsEmpty() )
589 {
590 int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
591 HDC dc = GetWindowDC(GetHwnd());
592 HFONT oldFont = 0;
593 if (GetFont().Ok() && GetFont().GetResourceHandle())
594 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
595
596 GetTextMetrics(dc, &lpTextMetric);
597 SIZE extentXY;
598 ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
599 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
600
601 if (oldFont)
602 ::SelectObject(dc, oldFont);
603
604 ReleaseDC(GetHwnd(), dc);
605 if (extentX > existingExtent)
606 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
607 }
608 else
609 {
610 int largestExtent = 0;
611 HDC dc = GetWindowDC(GetHwnd());
612 HFONT oldFont = 0;
613 if (GetFont().Ok() && GetFont().GetResourceHandle())
614 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
615
616 GetTextMetrics(dc, &lpTextMetric);
617 int i;
618 for (i = 0; i < m_noItems; i++)
619 {
620 int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LONG)wxBuffer);
621 wxBuffer[len] = 0;
622 SIZE extentXY;
623 ::GetTextExtentPoint(dc, (LPTSTR)wxBuffer, len, &extentXY);
624 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
625 if (extentX > largestExtent)
626 largestExtent = extentX;
627 }
628 if (oldFont)
629 ::SelectObject(dc, oldFont);
630
631 ReleaseDC(GetHwnd(), dc);
632 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
633 }
634}
635
636wxSize wxListBox::DoGetBestSize() const
637{
638 // find the widest string
639 int wLine;
640 int wListbox = 0;
641 for ( int i = 0; i < m_noItems; i++ )
642 {
643 wxString str(GetString(i));
644 GetTextExtent(str, &wLine, NULL);
645 if ( wLine > wListbox )
646 wListbox = wLine;
647 }
648
649 // give it some reasonable default value if there are no strings in the
650 // list
651 if ( wListbox == 0 )
652 wListbox = 100;
653
654 // the listbox should be slightly larger than the widest string
655 int cx, cy;
656 wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
657
658 wListbox += 3*cx;
659
660 int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*(wxMax(m_noItems, 7));
661
662 return wxSize(wListbox, hListbox);
663}
664
665// ----------------------------------------------------------------------------
666// callbacks
667// ----------------------------------------------------------------------------
668
669bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
670{
671 if ( param == LBN_SELCHANGE )
672 {
673 wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
674 event.SetEventObject( this );
675
676 wxArrayInt aSelections;
677 int n, count = GetSelections(aSelections);
678 if ( count > 0 )
679 {
680 n = aSelections[0];
681 if ( HasClientObjectData() )
682 event.SetClientObject( GetClientObject(n) );
683 else if ( HasClientUntypedData() )
684 event.SetClientData( GetClientData(n) );
685 event.SetString( GetString(n) );
686 }
687 else
688 {
689 n = -1;
690 }
691
692 event.m_commandInt = n;
693
694 return GetEventHandler()->ProcessEvent(event);
695 }
696 else if ( param == LBN_DBLCLK )
697 {
698 wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, m_windowId);
699 event.SetEventObject( this );
700
701 return GetEventHandler()->ProcessEvent(event);
702 }
703 //else:
704
705 return FALSE;
706}
707
708// ----------------------------------------------------------------------------
709// wxCheckListBox support
710// ----------------------------------------------------------------------------
711
712#if wxUSE_OWNER_DRAWN
713
714// drawing
715// -------
716
717// space beneath/above each row in pixels
718// "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
719#define OWNER_DRAWN_LISTBOX_EXTRA_SPACE (1)
720
721// the height is the same for all items
722// TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
723
724// NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
725// message is not yet sent when we get here!
726bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
727{
728 // only owner-drawn control should receive this message
729 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
730
731 MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
732
733 HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0);
734
735 wxDC dc;
736 dc.SetHDC((WXHDC)hdc);
737 dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_ANSI_VAR_FONT));
738
739 pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
740 pStruct->itemWidth = dc.GetCharWidth();
741
742 dc.SetHDC(0);
743
744 DeleteDC(hdc);
745
746 return TRUE;
747}
748
749// forward the message to the appropriate item
750bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
751{
752 // only owner-drawn control should receive this message
753 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
754
755 DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
756 UINT itemID = pStruct->itemID;
757
758 // the item may be -1 for an empty listbox
759 if ( itemID == (UINT)-1 )
760 return FALSE;
761
762 long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
763
764 wxCHECK( data && (data != LB_ERR), FALSE );
765
766 wxListBoxItem *pItem = (wxListBoxItem *)data;
767
768 wxDC dc;
769 dc.SetHDC((WXHDC)pStruct->hDC, FALSE);
770 wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
771 wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
772
773 return pItem->OnDrawItem(dc, rect,
774 (wxOwnerDrawn::wxODAction)pStruct->itemAction,
775 (wxOwnerDrawn::wxODStatus)pStruct->itemState);
776}
777
778#endif
779 // wxUSE_OWNER_DRAWN