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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#endif
33
34#include <windowsx.h>
35
36#ifdef __WXWINE__
37 #if defined(GetWindowStyle)
38 #undef GetWindowStyle
39 #endif
40#endif
41
42#include "wx/dynarray.h"
43#include "wx/log.h"
44
45#if wxUSE_OWNER_DRAWN
46 #include "wx/ownerdrw.h"
47#endif
48
49#ifndef __TWIN32__
50 #if defined(__GNUWIN32__)
51 #include <wx/msw/gnuwin32/extra.h>
52 #endif
53#endif
54
55#ifdef __WXWINE__
56 #ifndef ListBox_SetItemData
57 #define ListBox_SetItemData(hwndCtl, index, data) \
58 ((int)(DWORD)SendMessage((hwndCtl), LB_SETITEMDATA, (WPARAM)(int)(index), (LPARAM)(data)))
59 #endif
60 #ifndef ListBox_GetHorizontalExtent
61 #define ListBox_GetHorizontalExtent(hwndCtl) \
62 ((int)(DWORD)SendMessage((hwndCtl), LB_GETHORIZONTALEXTENT, 0L, 0L))
63 #endif
64 #ifndef ListBox_GetSelCount
65 #define ListBox_GetSelCount(hwndCtl) \
66 ((int)(DWORD)SendMessage((hwndCtl), LB_GETSELCOUNT, 0L, 0L))
67 #endif
68 #ifndef ListBox_GetSelItems
69 #define ListBox_GetSelItems(hwndCtl, cItems, lpItems) \
70 ((int)(DWORD)SendMessage((hwndCtl), LB_GETSELITEMS, (WPARAM)(int)(cItems), (LPARAM)(int *)(lpItems)))
71 #endif
72 #ifndef ListBox_GetTextLen
73 #define ListBox_GetTextLen(hwndCtl, index) \
74 ((int)(DWORD)SendMessage((hwndCtl), LB_GETTEXTLEN, (WPARAM)(int)(index), 0L))
75 #endif
76 #ifndef ListBox_GetText
77 #define ListBox_GetText(hwndCtl, index, lpszBuffer) \
78 ((int)(DWORD)SendMessage((hwndCtl), LB_GETTEXT, (WPARAM)(int)(index), (LPARAM)(LPCTSTR)(lpszBuffer)))
79 #endif
80#endif
81
82#if !USE_SHARED_LIBRARY
83 IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
84#endif
85
86// ============================================================================
87// list box item declaration and implementation
88// ============================================================================
89
90#if wxUSE_OWNER_DRAWN
91
92class wxListBoxItem : public wxOwnerDrawn
93{
94public:
95 wxListBoxItem(const wxString& str = "");
96};
97
98wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, FALSE)
99{
100 // no bitmaps/checkmarks
101 SetMarginWidth(0);
102}
103
104wxOwnerDrawn *wxListBox::CreateItem(size_t n)
105{
106 return new wxListBoxItem();
107}
108
109#endif //USE_OWNER_DRAWN
110
111// ============================================================================
112// list box control implementation
113// ============================================================================
114
115bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
116{
117 /*
118 if (param == LBN_SELCANCEL)
119 {
120 event.extraLong = FALSE;
121 }
122 */
123 if (param == LBN_SELCHANGE)
124 {
125 wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
126 wxArrayInt aSelections;
127 int count = GetSelections(aSelections);
128 if ( count > 0 )
129 {
130 event.m_commandInt = aSelections[0] ;
131 event.m_clientData = GetClientData(event.m_commandInt);
132 wxString str(GetString(event.m_commandInt));
133 if (str != _T(""))
134 {
135 event.m_commandString = str;
136 }
137 }
138 else
139 {
140 event.m_commandInt = -1 ;
141 event.m_commandString.Empty();
142 }
143
144 event.SetEventObject( this );
145 ProcessCommand(event);
146 return TRUE;
147 }
148 else if (param == LBN_DBLCLK)
149 {
150 wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, m_windowId);
151 event.SetEventObject( this );
152 GetEventHandler()->ProcessEvent(event) ;
153 return TRUE;
154 }
155
156 return FALSE;
157}
158
159 // Listbox item
160wxListBox::wxListBox()
161{
162 m_noItems = 0;
163 m_selected = 0;
164}
165
166bool wxListBox::Create(wxWindow *parent,
167 wxWindowID id,
168 const wxPoint& pos,
169 const wxSize& size,
170 int n, const wxString choices[],
171 long style,
172 const wxValidator& validator,
173 const wxString& name)
174{
175 m_noItems = 0;
176 m_hWnd = 0;
177 m_selected = 0;
178
179 SetName(name);
180 SetValidator(validator);
181
182 if (parent)
183 parent->AddChild(this);
184
185 wxSystemSettings settings;
186 SetBackgroundColour(settings.GetSystemColour(wxSYS_COLOUR_WINDOW));
187 SetForegroundColour(parent->GetForegroundColour());
188
189 m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
190
191 int x = pos.x;
192 int y = pos.y;
193 int width = size.x;
194 int height = size.y;
195 m_windowStyle = style;
196
197 DWORD wstyle = WS_VISIBLE | WS_VSCROLL | WS_TABSTOP |
198 LBS_NOTIFY | LBS_HASSTRINGS;
199 if (m_windowStyle & wxLB_MULTIPLE)
200 wstyle |= LBS_MULTIPLESEL;
201 else if (m_windowStyle & wxLB_EXTENDED)
202 wstyle |= LBS_EXTENDEDSEL;
203
204 if (m_windowStyle & wxLB_ALWAYS_SB)
205 wstyle |= LBS_DISABLENOSCROLL ;
206 if (m_windowStyle & wxLB_HSCROLL)
207 wstyle |= WS_HSCROLL;
208 if (m_windowStyle & wxLB_SORT)
209 wstyle |= LBS_SORT;
210
211#if wxUSE_OWNER_DRAWN
212 if ( m_windowStyle & wxLB_OWNERDRAW ) {
213 // we don't support LBS_OWNERDRAWVARIABLE yet
214 wstyle |= LBS_OWNERDRAWFIXED;
215 }
216#endif
217
218 // Without this style, you get unexpected heights, so e.g. constraint layout
219 // doesn't work properly
220 wstyle |= LBS_NOINTEGRALHEIGHT;
221
222 bool want3D;
223 WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
224
225 // Even with extended styles, need to combine with WS_BORDER
226 // for them to look right.
227 if ( want3D || wxStyleHasBorder(m_windowStyle) )
228 {
229 wstyle |= WS_BORDER;
230 }
231
232 m_hWnd = (WXHWND)::CreateWindowEx(exStyle, _T("LISTBOX"), NULL,
233 wstyle | WS_CHILD,
234 0, 0, 0, 0,
235 (HWND)parent->GetHWND(), (HMENU)m_windowId,
236 wxGetInstance(), NULL);
237
238 wxCHECK_MSG( m_hWnd, FALSE, _T("Failed to create listbox") );
239
240#if wxUSE_CTL3D
241 if (want3D)
242 {
243 Ctl3dSubclassCtl(GetHwnd());
244 m_useCtl3D = TRUE;
245 }
246#endif
247
248 // Subclass again to catch messages
249 SubclassWin(m_hWnd);
250
251 size_t ui;
252 for (ui = 0; ui < (size_t)n; ui++) {
253 Append(choices[ui]);
254 }
255
256 if ( (m_windowStyle & wxLB_MULTIPLE) == 0 )
257 SendMessage(GetHwnd(), LB_SETCURSEL, 0, 0);
258
259 SetFont(parent->GetFont());
260
261 SetSize(x, y, width, height);
262
263 Show(TRUE);
264
265 return TRUE;
266}
267
268wxListBox::~wxListBox()
269{
270#if wxUSE_OWNER_DRAWN
271 size_t uiCount = m_aItems.Count();
272 while ( uiCount-- != 0 ) {
273 delete m_aItems[uiCount];
274 }
275#endif // wxUSE_OWNER_DRAWN
276}
277
278void wxListBox::SetupColours()
279{
280 SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
281 SetForegroundColour(GetParent()->GetForegroundColour());
282}
283
284void wxListBox::SetFirstItem(int N)
285{
286 wxCHECK_RET( N >= 0 && N < m_noItems,
287 _T("invalid index in wxListBox::SetFirstItem") );
288
289 SendMessage(GetHwnd(),LB_SETTOPINDEX,(WPARAM)N,(LPARAM)0) ;
290}
291
292void wxListBox::SetFirstItem(const wxString& s)
293{
294 int N = FindString(s) ;
295
296 if ( N >= 0 )
297 SetFirstItem(N) ;
298}
299
300void wxListBox::Delete(int N)
301{
302 wxCHECK_RET( N >= 0 && N < m_noItems,
303 _T("invalid index in wxListBox::Delete") );
304
305 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
306 m_noItems--;
307
308 SetHorizontalExtent("");
309}
310
311void wxListBox::Append(const wxString& item)
312{
313 int index = ListBox_AddString(GetHwnd(), item);
314 m_noItems ++;
315
316#if wxUSE_OWNER_DRAWN
317 if ( m_windowStyle & wxLB_OWNERDRAW ) {
318 wxOwnerDrawn *pNewItem = CreateItem(index); // dummy argument
319 pNewItem->SetName(item);
320 m_aItems.Add(pNewItem);
321 ListBox_SetItemData(GetHwnd(), index, pNewItem);
322 }
323#endif
324
325 SetHorizontalExtent(item);
326}
327
328void wxListBox::Append(const wxString& item, void *Client_data)
329{
330 int index = ListBox_AddString(GetHwnd(), item);
331 m_noItems ++;
332
333#if wxUSE_OWNER_DRAWN
334 if ( m_windowStyle & wxLB_OWNERDRAW ) {
335 // client data must be pointer to wxOwnerDrawn, otherwise we would crash
336 // in OnMeasure/OnDraw.
337 wxFAIL_MSG(_T("Can't use client data with owner-drawn listboxes"));
338 }
339 else
340#endif
341
342 ListBox_SetItemData(GetHwnd(), index, Client_data);
343
344 SetHorizontalExtent(item);
345}
346
347void wxListBox::Set(int n, const wxString *choices, void** clientData)
348{
349 ShowWindow(GetHwnd(), SW_HIDE);
350 ListBox_ResetContent(GetHwnd());
351 int i;
352 for (i = 0; i < n; i++)
353 {
354 ListBox_AddString(GetHwnd(), choices[i]);
355 if ( clientData )
356 ListBox_SetItemData(GetHwnd(), i, clientData[i]);
357 }
358 m_noItems = n;
359
360#if wxUSE_OWNER_DRAWN
361 if ( m_windowStyle & wxLB_OWNERDRAW ) {
362 // first delete old items
363 size_t ui = m_aItems.Count();
364 while ( ui-- != 0 ) {
365 delete m_aItems[ui];
366 }
367 m_aItems.Empty();
368
369 // then create new ones
370 for (ui = 0; ui < (size_t)n; ui++) {
371 wxOwnerDrawn *pNewItem = CreateItem(ui);
372 pNewItem->SetName(choices[ui]);
373 m_aItems.Add(pNewItem);
374 ListBox_SetItemData(GetHwnd(), ui, pNewItem);
375
376 wxASSERT_MSG(clientData[ui] == NULL,
377 _T("Can't use client data with owner-drawn listboxes"));
378 }
379 }
380#endif
381
382 SetHorizontalExtent("");
383 ShowWindow(GetHwnd(), SW_SHOW);
384}
385
386int wxListBox::FindString(const wxString& s) const
387{
388 int pos = ListBox_FindStringExact(GetHwnd(), (WPARAM)-1, s);
389 if (pos == LB_ERR)
390 return -1;
391 else
392 return pos;
393}
394
395void wxListBox::Clear()
396{
397 ListBox_ResetContent(GetHwnd());
398
399#if wxUSE_OWNER_DRAWN
400 size_t uiCount = m_aItems.Count();
401 while ( uiCount-- != 0 ) {
402 delete m_aItems[uiCount];
403 }
404
405 m_aItems.Clear();
406#endif // wxUSE_OWNER_DRAWN
407
408 m_noItems = 0;
409 ListBox_GetHorizontalExtent(GetHwnd());
410}
411
412void wxListBox::SetSelection(int N, bool select)
413{
414 wxCHECK_RET( N >= 0 && N < m_noItems,
415 _T("invalid index in wxListBox::SetSelection") );
416
417 if ((m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED))
418 SendMessage(GetHwnd(), LB_SETSEL, select, N);
419 else
420 {
421 int N1 = N;
422 if (!select)
423 N1 = -1;
424 SendMessage(GetHwnd(), LB_SETCURSEL, N1, 0);
425 }
426}
427
428bool wxListBox::Selected(int N) const
429{
430 wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
431 _T("invalid index in wxListBox::Selected") );
432
433 return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
434}
435
436void wxListBox::Deselect(int N)
437{
438 wxCHECK_RET( N >= 0 && N < m_noItems,
439 _T("invalid index in wxListBox::Deselect") );
440
441 if ((m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED))
442 SendMessage(GetHwnd(), LB_SETSEL, FALSE, N);
443}
444
445void *wxListBox::GetClientData(int N) const
446{
447 wxCHECK_MSG( N >= 0 && N < m_noItems, NULL,
448 _T("invalid index in wxListBox::GetClientData") );
449
450 return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, N, 0);
451}
452
453void wxListBox::SetClientData(int N, void *Client_data)
454{
455 wxCHECK_RET( N >= 0 && N < m_noItems,
456 _T("invalid index in wxListBox::SetClientData") );
457
458 if ( ListBox_SetItemData(GetHwnd(), N, Client_data) == LB_ERR )
459 wxLogDebug(_T("LB_SETITEMDATA failed"));
460}
461
462// Return number of selections and an array of selected integers
463int wxListBox::GetSelections(wxArrayInt& aSelections) const
464{
465 aSelections.Empty();
466
467 if ((m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED))
468 {
469 int no_sel = ListBox_GetSelCount(GetHwnd());
470 if (no_sel != 0) {
471 int *selections = new int[no_sel];
472 if ( ListBox_GetSelItems(GetHwnd(), no_sel, selections) == LB_ERR ) {
473 wxFAIL_MSG(_T("This listbox can't have single-selection style!"));
474 }
475
476 aSelections.Alloc(no_sel);
477 for ( int n = 0; n < no_sel; n++ )
478 aSelections.Add(selections[n]);
479
480 delete [] selections;
481 }
482
483 return no_sel;
484 }
485 else // single-selection listbox
486 {
487 aSelections.Add(ListBox_GetCurSel(GetHwnd()));
488
489 return 1;
490 }
491}
492
493// Get single selection, for single choice list items
494int wxListBox::GetSelection() const
495{
496 wxCHECK_MSG( !(m_windowStyle & wxLB_MULTIPLE) &&
497 !(m_windowStyle & wxLB_EXTENDED),
498 -1,
499 _T("GetSelection() can't be used with multiple-selection "
500 "listboxes, use GetSelections() instead.") );
501
502 return ListBox_GetCurSel(GetHwnd());
503}
504
505// Find string for position
506wxString wxListBox::GetString(int N) const
507{
508 wxCHECK_MSG( N >= 0 && N < m_noItems, "",
509 _T("invalid index in wxListBox::GetClientData") );
510
511 int len = ListBox_GetTextLen(GetHwnd(), N);
512
513 // +1 for terminating NUL
514 wxString result;
515 ListBox_GetText(GetHwnd(), N, result.GetWriteBuf(len + 1));
516 result.UngetWriteBuf();
517
518 return result;
519}
520
521// Windows-specific code to set the horizontal extent of the listbox, if
522// necessary. If s is non-NULL, it's used to calculate the horizontal extent.
523// Otherwise, all strings are used.
524void wxListBox::SetHorizontalExtent(const wxString& s)
525{
526 // Only necessary if we want a horizontal scrollbar
527 if (!(m_windowStyle & wxHSCROLL))
528 return;
529 TEXTMETRIC lpTextMetric;
530
531 if (s != _T(""))
532 {
533 int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
534 HDC dc = GetWindowDC(GetHwnd());
535 HFONT oldFont = 0;
536 if (GetFont().Ok() && GetFont().GetResourceHandle())
537 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
538
539 GetTextMetrics(dc, &lpTextMetric);
540 SIZE extentXY;
541 ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
542 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
543
544 if (oldFont)
545 ::SelectObject(dc, oldFont);
546
547 ReleaseDC(GetHwnd(), dc);
548 if (extentX > existingExtent)
549 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
550 return;
551 }
552 else
553 {
554 int largestExtent = 0;
555 HDC dc = GetWindowDC(GetHwnd());
556 HFONT oldFont = 0;
557 if (GetFont().Ok() && GetFont().GetResourceHandle())
558 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
559
560 GetTextMetrics(dc, &lpTextMetric);
561 int i;
562 for (i = 0; i < m_noItems; i++)
563 {
564 int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LONG)wxBuffer);
565 wxBuffer[len] = 0;
566 SIZE extentXY;
567 ::GetTextExtentPoint(dc, (LPTSTR)wxBuffer, len, &extentXY);
568 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
569 if (extentX > largestExtent)
570 largestExtent = extentX;
571 }
572 if (oldFont)
573 ::SelectObject(dc, oldFont);
574
575 ReleaseDC(GetHwnd(), dc);
576 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
577 }
578}
579
580void
581wxListBox::InsertItems(int nItems, const wxString items[], int pos)
582{
583 wxCHECK_RET( pos >= 0 && pos <= m_noItems,
584 _T("invalid index in wxListBox::InsertItems") );
585
586 int i;
587 for (i = 0; i < nItems; i++)
588 ListBox_InsertString(GetHwnd(), i + pos, items[i]);
589 m_noItems += nItems;
590
591 SetHorizontalExtent(_T(""));
592}
593
594void wxListBox::SetString(int N, const wxString& s)
595{
596 wxCHECK_RET( N >= 0 && N < m_noItems,
597 _T("invalid index in wxListBox::SetString") );
598
599 int sel = -1;
600 if (!(m_windowStyle & wxLB_MULTIPLE) && !(m_windowStyle & wxLB_EXTENDED))
601 sel = GetSelection();
602
603 void *oldData = wxListBox::GetClientData(N);
604
605 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
606
607 int newN = N;
608 if (N == (m_noItems - 1))
609 newN = -1;
610
611 SendMessage(GetHwnd(), LB_INSERTSTRING, newN, (LPARAM) (const wxChar *)s);
612 if (oldData)
613 wxListBox::SetClientData(N, oldData);
614
615 // Selection may have changed
616 if (sel >= 0)
617 SetSelection(sel);
618
619#if wxUSE_OWNER_DRAWN
620 if ( m_windowStyle & wxLB_OWNERDRAW )
621 // update item's text
622 m_aItems[N]->SetName(s);
623#endif //USE_OWNER_DRAWN
624}
625
626int wxListBox::Number () const
627{
628 return m_noItems;
629}
630
631// For single selection items only
632wxString wxListBox::GetStringSelection () const
633{
634 int sel = GetSelection ();
635 if (sel > -1)
636 return this->GetString (sel);
637 else
638 return wxString("");
639}
640
641bool wxListBox::SetStringSelection (const wxString& s, bool flag)
642{
643 int sel = FindString (s);
644 if (sel > -1)
645 {
646 SetSelection (sel, flag);
647 return TRUE;
648 }
649 else
650 return FALSE;
651}
652
653// Is this the right thing? Won't setselection generate a command
654// event too? No! It'll just generate a setselection event.
655// But we still can't have this being called whenever a real command
656// is generated, because it sets the selection, which will already
657// have been done! (Unless we have an optional argument for calling
658// by the actual window system, or a separate function, ProcessCommand)
659void wxListBox::Command (wxCommandEvent & event)
660{
661 if (event.m_extraLong)
662 SetSelection (event.m_commandInt);
663 else
664 {
665 Deselect (event.m_commandInt);
666 return;
667 }
668 ProcessCommand (event);
669}
670
671WXHBRUSH wxListBox::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
672 WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
673{
674#if wxUSE_CTL3D
675 if ( m_useCtl3D )
676 {
677 HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
678 return (WXHBRUSH) hbrush;
679 }
680#endif
681
682 if (GetParent()->GetTransparentBackground())
683 SetBkMode((HDC) pDC, TRANSPARENT);
684 else
685 SetBkMode((HDC) pDC, OPAQUE);
686
687 ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
688 ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
689
690 wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
691
692 // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
693 // has a zero usage count.
694 backgroundBrush->RealizeResource();
695 return (WXHBRUSH) backgroundBrush->GetResourceHandle();
696}
697
698long wxListBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
699{
700 return wxControl::MSWWindowProc(nMsg, wParam, lParam);
701}
702
703#if wxUSE_OWNER_DRAWN
704
705// drawing
706// -------
707
708// space beneath/above each row in pixels
709// "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
710#define OWNER_DRAWN_LISTBOX_EXTRA_SPACE (1)
711
712// the height is the same for all items
713// TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
714
715// NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
716// message is not yet sent when we get here!
717bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
718{
719 // only owner-drawn control should receive this message
720 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
721
722 MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
723
724 wxDC dc;
725 dc.SetHDC((WXHDC)CreateIC(_T("DISPLAY"), NULL, NULL, 0));
726 dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_ANSI_VAR_FONT));
727
728 pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
729 pStruct->itemWidth = dc.GetCharWidth();
730
731 return TRUE;
732}
733
734// forward the message to the appropriate item
735bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
736{
737 // only owner-drawn control should receive this message
738 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
739
740 DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
741
742 long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
743
744 wxCHECK( data && (data != LB_ERR), FALSE );
745
746 wxListBoxItem *pItem = (wxListBoxItem *)data;
747
748 wxDC dc;
749 dc.SetHDC((WXHDC)pStruct->hDC, FALSE);
750 wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
751 wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
752
753 return pItem->OnDrawItem(dc, rect,
754 (wxOwnerDrawn::wxODAction)pStruct->itemAction,
755 (wxOwnerDrawn::wxODStatus)pStruct->itemState);
756}
757
758#endif
759 // wxUSE_OWNER_DRAWN