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compilation fix for wxUSE_INTL == 0 (patch 646466)
[wxWidgets.git] / src / msw / listbox.cpp
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2bda0e17 1///////////////////////////////////////////////////////////////////////////////
1e6feb95 2// Name: src/msw/listbox.cpp
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3// Purpose: wxListBox
4// Author: Julian Smart
5// Modified by: Vadim Zeitlin (owner drawn stuff)
dd3c394a 6// Created:
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7// RCS-ID: $Id$
8// Copyright: (c) Julian Smart
9// Licence: wxWindows license
10///////////////////////////////////////////////////////////////////////////////
11
12#ifdef __GNUG__
dd3c394a 13 #pragma implementation "listbox.h"
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14#endif
15
16// For compilers that support precompilation, includes "wx.h".
17#include "wx/wxprec.h"
18
19#ifdef __BORLANDC__
dd3c394a 20 #pragma hdrstop
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21#endif
22
1e6feb95 23#if wxUSE_LISTBOX
0c589ad0 24
2bda0e17 25#ifndef WX_PRECOMP
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26#include "wx/listbox.h"
27#include "wx/settings.h"
28#include "wx/brush.h"
29#include "wx/font.h"
30#include "wx/dc.h"
2662e49e 31#include "wx/utils.h"
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32#endif
33
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34#include "wx/window.h"
35#include "wx/msw/private.h"
36
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37#include <windowsx.h>
38
39#ifdef __WXWINE__
40 #if defined(GetWindowStyle)
41 #undef GetWindowStyle
42 #endif
43#endif
44
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45#include "wx/dynarray.h"
46#include "wx/log.h"
2bda0e17 47
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48#if wxUSE_OWNER_DRAWN
49 #include "wx/ownerdrw.h"
50#endif
2bda0e17 51
57c208c5 52#ifndef __TWIN32__
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53 #ifdef __GNUWIN32_OLD__
54 #include "wx/msw/gnuwin32/extra.h"
dd3c394a 55 #endif
57c208c5 56#endif
2bda0e17 57
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58#ifdef __WXWINE__
59 #ifndef ListBox_SetItemData
60 #define ListBox_SetItemData(hwndCtl, index, data) \
61 ((int)(DWORD)SendMessage((hwndCtl), LB_SETITEMDATA, (WPARAM)(int)(index), (LPARAM)(data)))
62 #endif
63 #ifndef ListBox_GetHorizontalExtent
64 #define ListBox_GetHorizontalExtent(hwndCtl) \
65 ((int)(DWORD)SendMessage((hwndCtl), LB_GETHORIZONTALEXTENT, 0L, 0L))
66 #endif
67 #ifndef ListBox_GetSelCount
68 #define ListBox_GetSelCount(hwndCtl) \
69 ((int)(DWORD)SendMessage((hwndCtl), LB_GETSELCOUNT, 0L, 0L))
70 #endif
71 #ifndef ListBox_GetSelItems
72 #define ListBox_GetSelItems(hwndCtl, cItems, lpItems) \
73 ((int)(DWORD)SendMessage((hwndCtl), LB_GETSELITEMS, (WPARAM)(int)(cItems), (LPARAM)(int *)(lpItems)))
74 #endif
75 #ifndef ListBox_GetTextLen
76 #define ListBox_GetTextLen(hwndCtl, index) \
77 ((int)(DWORD)SendMessage((hwndCtl), LB_GETTEXTLEN, (WPARAM)(int)(index), 0L))
78 #endif
79 #ifndef ListBox_GetText
80 #define ListBox_GetText(hwndCtl, index, lpszBuffer) \
81 ((int)(DWORD)SendMessage((hwndCtl), LB_GETTEXT, (WPARAM)(int)(index), (LPARAM)(LPCTSTR)(lpszBuffer)))
82 #endif
83#endif
14483330 84
dd3c394a 85 IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
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86
87// ============================================================================
88// list box item declaration and implementation
89// ============================================================================
90
47d67540 91#if wxUSE_OWNER_DRAWN
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92
93class wxListBoxItem : public wxOwnerDrawn
94{
95public:
2b5f62a0 96 wxListBoxItem(const wxString& str = wxEmptyString);
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97};
98
dd3c394a 99wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, FALSE)
2bda0e17 100{
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101 // no bitmaps/checkmarks
102 SetMarginWidth(0);
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103}
104
2b5f62a0 105wxOwnerDrawn *wxListBox::CreateLboxItem(size_t WXUNUSED(n))
2bda0e17 106{
dd3c394a 107 return new wxListBoxItem();
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108}
109
110#endif //USE_OWNER_DRAWN
111
112// ============================================================================
113// list box control implementation
114// ============================================================================
115
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116// ----------------------------------------------------------------------------
117// creation
118// ----------------------------------------------------------------------------
dd3c394a 119
2ee3ee1b 120// Listbox item
bfc6fde4 121wxListBox::wxListBox()
2bda0e17 122{
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123 m_noItems = 0;
124 m_selected = 0;
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125}
126
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127bool wxListBox::Create(wxWindow *parent,
128 wxWindowID id,
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129 const wxPoint& pos,
130 const wxSize& size,
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131 int n, const wxString choices[],
132 long style,
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133 const wxValidator& validator,
134 const wxString& name)
135{
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136 m_noItems = 0;
137 m_hWnd = 0;
138 m_selected = 0;
2bda0e17 139
dd3c394a 140 SetName(name);
11b6a93b 141#if wxUSE_VALIDATORS
dd3c394a 142 SetValidator(validator);
11b6a93b 143#endif // wxUSE_VALIDATORS
2bda0e17 144
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145 if (parent)
146 parent->AddChild(this);
2bda0e17 147
7516ed26 148 SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
dd3c394a 149 SetForegroundColour(parent->GetForegroundColour());
2bda0e17 150
dd3c394a 151 m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
2bda0e17 152
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153 int x = pos.x;
154 int y = pos.y;
155 int width = size.x;
156 int height = size.y;
157 m_windowStyle = style;
2bda0e17 158
42e69d6b 159 DWORD wstyle = WS_VISIBLE | WS_VSCROLL | WS_TABSTOP |
f6bcfd97 160 LBS_NOTIFY | LBS_HASSTRINGS /* | WS_CLIPSIBLINGS */;
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161
162 wxASSERT_MSG( !(style & wxLB_MULTIPLE) || !(style & wxLB_EXTENDED),
163 _T("only one of listbox selection modes can be specified") );
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164 if ( m_windowStyle & wxCLIP_SIBLINGS )
165 wstyle |= WS_CLIPSIBLINGS;
54081dc5 166
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167 if (m_windowStyle & wxLB_MULTIPLE)
168 wstyle |= LBS_MULTIPLESEL;
169 else if (m_windowStyle & wxLB_EXTENDED)
170 wstyle |= LBS_EXTENDEDSEL;
2bda0e17 171
dd3c394a 172 if (m_windowStyle & wxLB_ALWAYS_SB)
2ee3ee1b 173 wstyle |= LBS_DISABLENOSCROLL;
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174 if (m_windowStyle & wxLB_HSCROLL)
175 wstyle |= WS_HSCROLL;
176 if (m_windowStyle & wxLB_SORT)
177 wstyle |= LBS_SORT;
2bda0e17 178
47d67540 179#if wxUSE_OWNER_DRAWN
2bda0e17 180 if ( m_windowStyle & wxLB_OWNERDRAW ) {
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181 // we don't support LBS_OWNERDRAWVARIABLE yet
182 wstyle |= LBS_OWNERDRAWFIXED;
2bda0e17 183 }
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184#endif
185
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186 // Without this style, you get unexpected heights, so e.g. constraint layout
187 // doesn't work properly
188 wstyle |= LBS_NOINTEGRALHEIGHT;
189
190 bool want3D;
2ee3ee1b 191 WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
2bda0e17 192
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193 // Even with extended styles, need to combine with WS_BORDER for them to
194 // look right.
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195 if ( want3D || wxStyleHasBorder(m_windowStyle) )
196 {
197 wstyle |= WS_BORDER;
198 }
2bda0e17 199
223d09f6 200 m_hWnd = (WXHWND)::CreateWindowEx(exStyle, wxT("LISTBOX"), NULL,
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201 wstyle | WS_CHILD,
202 0, 0, 0, 0,
203 (HWND)parent->GetHWND(), (HMENU)m_windowId,
204 wxGetInstance(), NULL);
1c089c47 205
223d09f6 206 wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create listbox") );
1c089c47 207
1f112209 208#if wxUSE_CTL3D
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209 if (want3D)
210 {
a23fd0e1 211 Ctl3dSubclassCtl(GetHwnd());
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212 m_useCtl3D = TRUE;
213 }
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214#endif
215
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216 // Subclass again to catch messages
217 SubclassWin(m_hWnd);
2bda0e17 218
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219 size_t ui;
220 for (ui = 0; ui < (size_t)n; ui++) {
221 Append(choices[ui]);
2bda0e17 222 }
2bda0e17 223
dd3c394a 224 if ( (m_windowStyle & wxLB_MULTIPLE) == 0 )
a23fd0e1 225 SendMessage(GetHwnd(), LB_SETCURSEL, 0, 0);
2bda0e17 226
dd3c394a 227 SetFont(parent->GetFont());
2bda0e17 228
dd3c394a 229 SetSize(x, y, width, height);
2bda0e17 230
dd3c394a 231 return TRUE;
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232}
233
bfc6fde4 234wxListBox::~wxListBox()
2bda0e17 235{
baccb514 236 Free();
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237}
238
bfc6fde4 239void wxListBox::SetupColours()
2bda0e17 240{
a756f210 241 SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
dd3c394a 242 SetForegroundColour(GetParent()->GetForegroundColour());
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243}
244
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245// ----------------------------------------------------------------------------
246// implementation of wxListBoxBase methods
247// ----------------------------------------------------------------------------
248
249void wxListBox::DoSetFirstItem(int N)
2bda0e17 250{
dd3c394a 251 wxCHECK_RET( N >= 0 && N < m_noItems,
223d09f6 252 wxT("invalid index in wxListBox::SetFirstItem") );
dd3c394a 253
2ee3ee1b 254 SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
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255}
256
debe6624 257void wxListBox::Delete(int N)
2bda0e17 258{
dd3c394a 259 wxCHECK_RET( N >= 0 && N < m_noItems,
223d09f6 260 wxT("invalid index in wxListBox::Delete") );
dd3c394a 261
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262 // for owner drawn objects, the data is used for storing wxOwnerDrawn
263 // pointers and we shouldn't touch it
264#if !wxUSE_OWNER_DRAWN
265 if ( !(m_windowStyle & wxLB_OWNERDRAW) )
266#endif // !wxUSE_OWNER_DRAWN
267 if ( HasClientObjectData() )
268 {
269 delete GetClientObject(N);
270 }
6c8a980f 271
a23fd0e1 272 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
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273 m_noItems--;
274
2b5f62a0 275 SetHorizontalExtent(wxEmptyString);
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276}
277
2ee3ee1b 278int wxListBox::DoAppend(const wxString& item)
2bda0e17 279{
a23fd0e1 280 int index = ListBox_AddString(GetHwnd(), item);
2ee3ee1b 281 m_noItems++;
2bda0e17 282
47d67540 283#if wxUSE_OWNER_DRAWN
2bda0e17 284 if ( m_windowStyle & wxLB_OWNERDRAW ) {
2b5f62a0 285 wxOwnerDrawn *pNewItem = CreateLboxItem(index); // dummy argument
dd3c394a 286 pNewItem->SetName(item);
fd7ab28c 287 m_aItems.Insert(pNewItem, index);
a23fd0e1 288 ListBox_SetItemData(GetHwnd(), index, pNewItem);
60c65519 289 pNewItem->SetFont(GetFont());
2bda0e17 290 }
fd7ab28c 291#endif // wxUSE_OWNER_DRAWN
2bda0e17 292
dd3c394a 293 SetHorizontalExtent(item);
dd3c394a 294
2ee3ee1b 295 return index;
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296}
297
2ee3ee1b 298void wxListBox::DoSetItems(const wxArrayString& choices, void** clientData)
2bda0e17 299{
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300 // avoid flicker - but don't need to do this for a hidden listbox
301 bool hideAndShow = IsShown();
302 if ( hideAndShow )
303 {
304 ShowWindow(GetHwnd(), SW_HIDE);
305 }
2ee3ee1b 306
a23fd0e1 307 ListBox_ResetContent(GetHwnd());
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308
309 m_noItems = choices.GetCount();
dd3c394a 310 int i;
2ee3ee1b 311 for (i = 0; i < m_noItems; i++)
dd3c394a 312 {
a23fd0e1 313 ListBox_AddString(GetHwnd(), choices[i]);
dd3c394a 314 if ( clientData )
2ee3ee1b 315 {
2b5f62a0 316 SetClientData(i, clientData[i]);
2ee3ee1b 317 }
dd3c394a 318 }
2bda0e17 319
47d67540 320#if wxUSE_OWNER_DRAWN
2bda0e17 321 if ( m_windowStyle & wxLB_OWNERDRAW ) {
dd3c394a 322 // first delete old items
fd7ab28c 323 WX_CLEAR_ARRAY(m_aItems);
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324
325 // then create new ones
fd7ab28c 326 for ( size_t ui = 0; ui < (size_t)m_noItems; ui++ ) {
2b5f62a0 327 wxOwnerDrawn *pNewItem = CreateLboxItem(ui);
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328 pNewItem->SetName(choices[ui]);
329 m_aItems.Add(pNewItem);
a23fd0e1 330 ListBox_SetItemData(GetHwnd(), ui, pNewItem);
dd3c394a 331 }
2bda0e17 332 }
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333#endif // wxUSE_OWNER_DRAWN
334
335 SetHorizontalExtent();
2bda0e17 336
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337 if ( hideAndShow )
338 {
339 // show the listbox back if we hid it
340 ShowWindow(GetHwnd(), SW_SHOW);
341 }
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342}
343
344int wxListBox::FindString(const wxString& s) const
345{
a23fd0e1 346 int pos = ListBox_FindStringExact(GetHwnd(), (WPARAM)-1, s);
dd3c394a 347 if (pos == LB_ERR)
2ee3ee1b 348 return wxNOT_FOUND;
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349 else
350 return pos;
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351}
352
bfc6fde4 353void wxListBox::Clear()
2bda0e17 354{
baccb514 355 Free();
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356
357 ListBox_ResetContent(GetHwnd());
358
359 m_noItems = 0;
360 SetHorizontalExtent();
361}
362
363void wxListBox::Free()
2b273975 364{
dd3c394a 365#if wxUSE_OWNER_DRAWN
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366 if ( m_windowStyle & wxLB_OWNERDRAW )
367 {
fd7ab28c 368 WX_CLEAR_ARRAY(m_aItems);
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369 }
370 else
371#endif // wxUSE_OWNER_DRAWN
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372 if ( HasClientObjectData() )
373 {
374 for ( size_t n = 0; n < (size_t)m_noItems; n++ )
375 {
376 delete GetClientObject(n);
377 }
378 }
2bda0e17 379}
baccb514 380
debe6624 381void wxListBox::SetSelection(int N, bool select)
2bda0e17 382{
dd3c394a 383 wxCHECK_RET( N >= 0 && N < m_noItems,
223d09f6 384 wxT("invalid index in wxListBox::SetSelection") );
dd3c394a 385
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386 if ( HasMultipleSelection() )
387 {
a23fd0e1 388 SendMessage(GetHwnd(), LB_SETSEL, select, N);
2ee3ee1b 389 }
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390 else
391 {
2ee3ee1b 392 SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
dd3c394a 393 }
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394}
395
2ee3ee1b 396bool wxListBox::IsSelected(int N) const
2bda0e17 397{
dd3c394a 398 wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
223d09f6 399 wxT("invalid index in wxListBox::Selected") );
dd3c394a 400
a23fd0e1 401 return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
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402}
403
6c8a980f 404wxClientData* wxListBox::DoGetItemClientObject(int n) const
2bda0e17 405{
6c8a980f 406 return (wxClientData *)DoGetItemClientData(n);
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407}
408
6c8a980f 409void *wxListBox::DoGetItemClientData(int n) const
2bda0e17 410{
2ee3ee1b 411 wxCHECK_MSG( n >= 0 && n < m_noItems, NULL,
223d09f6 412 wxT("invalid index in wxListBox::GetClientData") );
dd3c394a 413
2ee3ee1b 414 return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
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415}
416
6c8a980f 417void wxListBox::DoSetItemClientObject(int n, wxClientData* clientData)
2bda0e17 418{
6c8a980f 419 DoSetItemClientData(n, clientData);
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420}
421
6c8a980f 422void wxListBox::DoSetItemClientData(int n, void *clientData)
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423{
424 wxCHECK_RET( n >= 0 && n < m_noItems,
223d09f6 425 wxT("invalid index in wxListBox::SetClientData") );
dd3c394a 426
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427#if wxUSE_OWNER_DRAWN
428 if ( m_windowStyle & wxLB_OWNERDRAW )
429 {
430 // client data must be pointer to wxOwnerDrawn, otherwise we would crash
431 // in OnMeasure/OnDraw.
432 wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
433 }
434#endif // wxUSE_OWNER_DRAWN
435
436 if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
223d09f6 437 wxLogDebug(wxT("LB_SETITEMDATA failed"));
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438}
439
440// Return number of selections and an array of selected integers
14483330 441int wxListBox::GetSelections(wxArrayInt& aSelections) const
2bda0e17 442{
dd3c394a 443 aSelections.Empty();
14483330 444
2ee3ee1b 445 if ( HasMultipleSelection() )
dd3c394a 446 {
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447 int countSel = ListBox_GetSelCount(GetHwnd());
448 if ( countSel == LB_ERR )
449 {
450 wxLogDebug(_T("ListBox_GetSelCount failed"));
451 }
452 else if ( countSel != 0 )
453 {
454 int *selections = new int[countSel];
14483330 455
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456 if ( ListBox_GetSelItems(GetHwnd(),
457 countSel, selections) == LB_ERR )
458 {
459 wxLogDebug(wxT("ListBox_GetSelItems failed"));
460 countSel = -1;
461 }
462 else
463 {
464 aSelections.Alloc(countSel);
465 for ( int n = 0; n < countSel; n++ )
466 aSelections.Add(selections[n]);
467 }
14483330 468
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469 delete [] selections;
470 }
14483330 471
d90879fa 472 return countSel;
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473 }
474 else // single-selection listbox
475 {
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476 if (ListBox_GetCurSel(GetHwnd()) > -1)
477 aSelections.Add(ListBox_GetCurSel(GetHwnd()));
14483330 478
f6bcfd97 479 return aSelections.Count();
dd3c394a 480 }
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481}
482
483// Get single selection, for single choice list items
14483330 484int wxListBox::GetSelection() const
2bda0e17 485{
2ee3ee1b 486 wxCHECK_MSG( !HasMultipleSelection(),
dd3c394a 487 -1,
f6bcfd97 488 wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") );
14483330 489
a23fd0e1 490 return ListBox_GetCurSel(GetHwnd());
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491}
492
493// Find string for position
debe6624 494wxString wxListBox::GetString(int N) const
2bda0e17 495{
2b5f62a0 496 wxCHECK_MSG( N >= 0 && N < m_noItems, wxEmptyString,
223d09f6 497 wxT("invalid index in wxListBox::GetClientData") );
dd3c394a 498
a23fd0e1 499 int len = ListBox_GetTextLen(GetHwnd(), N);
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500
501 // +1 for terminating NUL
502 wxString result;
a23fd0e1 503 ListBox_GetText(GetHwnd(), N, result.GetWriteBuf(len + 1));
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504 result.UngetWriteBuf();
505
506 return result;
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507}
508
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509void
510wxListBox::DoInsertItems(const wxArrayString& items, int pos)
511{
512 wxCHECK_RET( pos >= 0 && pos <= m_noItems,
513 wxT("invalid index in wxListBox::InsertItems") );
514
515 int nItems = items.GetCount();
516 for ( int i = 0; i < nItems; i++ )
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517 {
518 int idx = ListBox_InsertString(GetHwnd(), i + pos, items[i]);
519
520#if wxUSE_OWNER_DRAWN
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521 if ( m_windowStyle & wxLB_OWNERDRAW )
522 {
2b5f62a0 523 wxOwnerDrawn *pNewItem = CreateLboxItem(idx);
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524 pNewItem->SetName(items[i]);
525 pNewItem->SetFont(GetFont());
526 m_aItems.Insert(pNewItem, idx);
fd7ab28c 527
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528 ListBox_SetItemData(GetHwnd(), idx, pNewItem);
529 }
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530#endif // wxUSE_OWNER_DRAWN
531 }
532
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533 m_noItems += nItems;
534
535 SetHorizontalExtent();
536}
537
538void wxListBox::SetString(int N, const wxString& s)
539{
540 wxCHECK_RET( N >= 0 && N < m_noItems,
541 wxT("invalid index in wxListBox::SetString") );
542
543 // remember the state of the item
544 bool wasSelected = IsSelected(N);
545
546 void *oldData = NULL;
547 wxClientData *oldObjData = NULL;
1e6feb95 548 if ( m_clientDataItemsType == wxClientData_Void )
2ee3ee1b 549 oldData = GetClientData(N);
1e6feb95 550 else if ( m_clientDataItemsType == wxClientData_Object )
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551 oldObjData = GetClientObject(N);
552
553 // delete and recreate it
554 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
555
556 int newN = N;
557 if ( N == m_noItems - 1 )
558 newN = -1;
559
560 ListBox_InsertString(GetHwnd(), newN, s);
561
562 // restore the client data
563 if ( oldData )
564 SetClientData(N, oldData);
565 else if ( oldObjData )
566 SetClientObject(N, oldObjData);
567
568 // we may have lost the selection
569 if ( wasSelected )
570 Select(N);
571
572#if wxUSE_OWNER_DRAWN
573 if ( m_windowStyle & wxLB_OWNERDRAW )
c294f450 574 {
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575 // update item's text
576 m_aItems[N]->SetName(s);
fd7ab28c 577
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578 // reassign the item's data
579 ListBox_SetItemData(GetHwnd(), N, m_aItems[N]);
580 }
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581#endif //USE_OWNER_DRAWN
582}
583
584int wxListBox::GetCount() const
585{
586 return m_noItems;
587}
588
589// ----------------------------------------------------------------------------
590// helpers
591// ----------------------------------------------------------------------------
592
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593// Windows-specific code to set the horizontal extent of the listbox, if
594// necessary. If s is non-NULL, it's used to calculate the horizontal extent.
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595// Otherwise, all strings are used.
596void wxListBox::SetHorizontalExtent(const wxString& s)
597{
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598 // Only necessary if we want a horizontal scrollbar
599 if (!(m_windowStyle & wxHSCROLL))
600 return;
601 TEXTMETRIC lpTextMetric;
602
2ee3ee1b 603 if ( !s.IsEmpty() )
2bda0e17 604 {
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605 int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
606 HDC dc = GetWindowDC(GetHwnd());
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607 HFONT oldFont = 0;
608 if (GetFont().Ok() && GetFont().GetResourceHandle())
609 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
610
611 GetTextMetrics(dc, &lpTextMetric);
612 SIZE extentXY;
837e5743 613 ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
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614 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
615
616 if (oldFont)
617 ::SelectObject(dc, oldFont);
618
a23fd0e1 619 ReleaseDC(GetHwnd(), dc);
dd3c394a 620 if (extentX > existingExtent)
a23fd0e1 621 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
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622 }
623 else
624 {
625 int largestExtent = 0;
a23fd0e1 626 HDC dc = GetWindowDC(GetHwnd());
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627 HFONT oldFont = 0;
628 if (GetFont().Ok() && GetFont().GetResourceHandle())
629 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
630
631 GetTextMetrics(dc, &lpTextMetric);
632 int i;
633 for (i = 0; i < m_noItems; i++)
634 {
a23fd0e1 635 int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LONG)wxBuffer);
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636 wxBuffer[len] = 0;
637 SIZE extentXY;
837e5743 638 ::GetTextExtentPoint(dc, (LPTSTR)wxBuffer, len, &extentXY);
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639 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
640 if (extentX > largestExtent)
641 largestExtent = extentX;
642 }
643 if (oldFont)
644 ::SelectObject(dc, oldFont);
645
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646 ReleaseDC(GetHwnd(), dc);
647 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
2bda0e17 648 }
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649}
650
f68586e5 651wxSize wxListBox::DoGetBestSize() const
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652{
653 // find the widest string
654 int wLine;
655 int wListbox = 0;
656 for ( int i = 0; i < m_noItems; i++ )
657 {
658 wxString str(GetString(i));
659 GetTextExtent(str, &wLine, NULL);
660 if ( wLine > wListbox )
661 wListbox = wLine;
662 }
663
664 // give it some reasonable default value if there are no strings in the
665 // list
666 if ( wListbox == 0 )
667 wListbox = 100;
668
669 // the listbox should be slightly larger than the widest string
670 int cx, cy;
671 wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
672
673 wListbox += 3*cx;
674
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675 // don't make the listbox too tall (limit height to 10 items) but don't
676 // make it too small neither
677 int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*
678 wxMin(wxMax(m_noItems, 3), 10);
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679
680 return wxSize(wListbox, hListbox);
681}
682
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683// ----------------------------------------------------------------------------
684// callbacks
685// ----------------------------------------------------------------------------
686
687bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
2bda0e17 688{
bada28f0 689 wxEventType evtType;
8ee9d618 690 if ( param == LBN_SELCHANGE )
2bda0e17 691 {
bada28f0 692 evtType = wxEVT_COMMAND_LISTBOX_SELECTED;
2bda0e17 693 }
8ee9d618 694 else if ( param == LBN_DBLCLK )
2ee3ee1b 695 {
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696 evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
697 }
698 else
699 {
700 // some event we're not interested in
701 return FALSE;
702 }
703
704 wxCommandEvent event(evtType, m_windowId);
705 event.SetEventObject( this );
8ee9d618 706
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707 wxArrayInt aSelections;
708 int n, count = GetSelections(aSelections);
709 if ( count > 0 )
710 {
711 n = aSelections[0];
712 if ( HasClientObjectData() )
713 event.SetClientObject( GetClientObject(n) );
714 else if ( HasClientUntypedData() )
715 event.SetClientData( GetClientData(n) );
716 event.SetString( GetString(n) );
2ee3ee1b 717 }
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718 else
719 {
720 n = -1;
721 }
722
723 event.m_commandInt = n;
2ee3ee1b 724
bada28f0 725 return GetEventHandler()->ProcessEvent(event);
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726}
727
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728// ----------------------------------------------------------------------------
729// wxCheckListBox support
730// ----------------------------------------------------------------------------
2bda0e17 731
47d67540 732#if wxUSE_OWNER_DRAWN
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733
734// drawing
735// -------
736
737// space beneath/above each row in pixels
738// "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
739#define OWNER_DRAWN_LISTBOX_EXTRA_SPACE (1)
740
741// the height is the same for all items
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742// TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
743
744// NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
745// message is not yet sent when we get here!
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746bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
747{
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748 // only owner-drawn control should receive this message
749 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
2bda0e17 750
dd3c394a 751 MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
2bda0e17 752
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753 HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0);
754
dd3c394a 755 wxDC dc;
07cf98cb 756 dc.SetHDC((WXHDC)hdc);
a756f210 757 dc.SetFont(wxSystemSettings::GetFont(wxSYS_ANSI_VAR_FONT));
2bda0e17 758
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759 pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
760 pStruct->itemWidth = dc.GetCharWidth();
2bda0e17 761
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762 dc.SetHDC(0);
763
764 DeleteDC(hdc);
765
dd3c394a 766 return TRUE;
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767}
768
769// forward the message to the appropriate item
770bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
771{
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772 // only owner-drawn control should receive this message
773 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
774
775 DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
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776 UINT itemID = pStruct->itemID;
777
778 // the item may be -1 for an empty listbox
779 if ( itemID == (UINT)-1 )
780 return FALSE;
dd3c394a 781
a23fd0e1 782 long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
2bda0e17 783
dd3c394a 784 wxCHECK( data && (data != LB_ERR), FALSE );
2bda0e17 785
dd3c394a 786 wxListBoxItem *pItem = (wxListBoxItem *)data;
2bda0e17 787
7561aacd 788 wxDCTemp dc((WXHDC)pStruct->hDC);
dd3c394a 789 wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
f6bcfd97 790 wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
2bda0e17 791
dd3c394a 792 return pItem->OnDrawItem(dc, rect,
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793 (wxOwnerDrawn::wxODAction)pStruct->itemAction,
794 (wxOwnerDrawn::wxODStatus)pStruct->itemState);
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795}
796
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797#endif // wxUSE_OWNER_DRAWN
798
799#endif // wxUSE_LISTBOX