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[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:
dd3c394a 96 wxListBoxItem(const wxString& str = "");
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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
33ac7e6f 105wxOwnerDrawn *wxListBox::CreateItem(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{
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241 SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
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
275 SetHorizontalExtent("");
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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 ) {
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285 wxOwnerDrawn *pNewItem = CreateItem(index); // dummy argument
286 pNewItem->SetName(item);
287 m_aItems.Add(pNewItem);
a23fd0e1 288 ListBox_SetItemData(GetHwnd(), index, pNewItem);
60c65519 289 pNewItem->SetFont(GetFont());
2bda0e17 290 }
1c089c47 291#endif
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 )
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315 {
316#if wxUSE_OWNER_DRAWN
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317 if ( m_windowStyle & wxLB_OWNERDRAW )
318 {
319 wxASSERT_MSG(clientData[i] == NULL,
320 wxT("Can't use client data with owner-drawn listboxes"));
321 }
322 ListBox_SetItemData(GetHwnd(), i, clientData[i]);
2ee3ee1b 323#else // !wxUSE_OWNER_DRAWN
a23fd0e1 324 ListBox_SetItemData(GetHwnd(), i, clientData[i]);
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325#endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
326 }
dd3c394a 327 }
2bda0e17 328
47d67540 329#if wxUSE_OWNER_DRAWN
2bda0e17 330 if ( m_windowStyle & wxLB_OWNERDRAW ) {
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331 // first delete old items
332 size_t ui = m_aItems.Count();
333 while ( ui-- != 0 ) {
334 delete m_aItems[ui];
335 }
336 m_aItems.Empty();
337
338 // then create new ones
2ee3ee1b 339 for ( ui = 0; ui < (size_t)m_noItems; ui++ ) {
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340 wxOwnerDrawn *pNewItem = CreateItem(ui);
341 pNewItem->SetName(choices[ui]);
342 m_aItems.Add(pNewItem);
a23fd0e1 343 ListBox_SetItemData(GetHwnd(), ui, pNewItem);
dd3c394a 344 }
2bda0e17 345 }
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346#endif // wxUSE_OWNER_DRAWN
347
348 SetHorizontalExtent();
2bda0e17 349
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350 if ( hideAndShow )
351 {
352 // show the listbox back if we hid it
353 ShowWindow(GetHwnd(), SW_SHOW);
354 }
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355}
356
357int wxListBox::FindString(const wxString& s) const
358{
a23fd0e1 359 int pos = ListBox_FindStringExact(GetHwnd(), (WPARAM)-1, s);
dd3c394a 360 if (pos == LB_ERR)
2ee3ee1b 361 return wxNOT_FOUND;
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362 else
363 return pos;
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364}
365
bfc6fde4 366void wxListBox::Clear()
2bda0e17 367{
baccb514 368 Free();
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369
370 ListBox_ResetContent(GetHwnd());
371
372 m_noItems = 0;
373 SetHorizontalExtent();
374}
375
376void wxListBox::Free()
2b273975 377{
dd3c394a 378#if wxUSE_OWNER_DRAWN
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379 if ( m_windowStyle & wxLB_OWNERDRAW )
380 {
381 size_t uiCount = m_aItems.Count();
382 while ( uiCount-- != 0 ) {
383 delete m_aItems[uiCount];
384 }
dd3c394a 385
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386 m_aItems.Clear();
387 }
388 else
389#endif // wxUSE_OWNER_DRAWN
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390 if ( HasClientObjectData() )
391 {
392 for ( size_t n = 0; n < (size_t)m_noItems; n++ )
393 {
394 delete GetClientObject(n);
395 }
396 }
2bda0e17 397}
baccb514 398
debe6624 399void wxListBox::SetSelection(int N, bool select)
2bda0e17 400{
dd3c394a 401 wxCHECK_RET( N >= 0 && N < m_noItems,
223d09f6 402 wxT("invalid index in wxListBox::SetSelection") );
dd3c394a 403
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404 if ( HasMultipleSelection() )
405 {
a23fd0e1 406 SendMessage(GetHwnd(), LB_SETSEL, select, N);
2ee3ee1b 407 }
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408 else
409 {
2ee3ee1b 410 SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
dd3c394a 411 }
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412}
413
2ee3ee1b 414bool wxListBox::IsSelected(int N) const
2bda0e17 415{
dd3c394a 416 wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
223d09f6 417 wxT("invalid index in wxListBox::Selected") );
dd3c394a 418
a23fd0e1 419 return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
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420}
421
6c8a980f 422wxClientData* wxListBox::DoGetItemClientObject(int n) const
2bda0e17 423{
6c8a980f 424 return (wxClientData *)DoGetItemClientData(n);
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425}
426
6c8a980f 427void *wxListBox::DoGetItemClientData(int n) const
2bda0e17 428{
2ee3ee1b 429 wxCHECK_MSG( n >= 0 && n < m_noItems, NULL,
223d09f6 430 wxT("invalid index in wxListBox::GetClientData") );
dd3c394a 431
2ee3ee1b 432 return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
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433}
434
6c8a980f 435void wxListBox::DoSetItemClientObject(int n, wxClientData* clientData)
2bda0e17 436{
6c8a980f 437 DoSetItemClientData(n, clientData);
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438}
439
6c8a980f 440void wxListBox::DoSetItemClientData(int n, void *clientData)
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441{
442 wxCHECK_RET( n >= 0 && n < m_noItems,
223d09f6 443 wxT("invalid index in wxListBox::SetClientData") );
dd3c394a 444
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445#if wxUSE_OWNER_DRAWN
446 if ( m_windowStyle & wxLB_OWNERDRAW )
447 {
448 // client data must be pointer to wxOwnerDrawn, otherwise we would crash
449 // in OnMeasure/OnDraw.
450 wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
451 }
452#endif // wxUSE_OWNER_DRAWN
453
454 if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
223d09f6 455 wxLogDebug(wxT("LB_SETITEMDATA failed"));
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456}
457
458// Return number of selections and an array of selected integers
14483330 459int wxListBox::GetSelections(wxArrayInt& aSelections) const
2bda0e17 460{
dd3c394a 461 aSelections.Empty();
14483330 462
2ee3ee1b 463 if ( HasMultipleSelection() )
dd3c394a 464 {
a23fd0e1 465 int no_sel = ListBox_GetSelCount(GetHwnd());
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466 if (no_sel != 0) {
467 int *selections = new int[no_sel];
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468 int rc = ListBox_GetSelItems(GetHwnd(), no_sel, selections);
469
470 wxCHECK_MSG(rc != LB_ERR, -1, wxT("ListBox_GetSelItems failed"));
14483330 471
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472 aSelections.Alloc(no_sel);
473 for ( int n = 0; n < no_sel; n++ )
474 aSelections.Add(selections[n]);
14483330 475
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476 delete [] selections;
477 }
14483330 478
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479 return no_sel;
480 }
481 else // single-selection listbox
482 {
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483 if (ListBox_GetCurSel(GetHwnd()) > -1)
484 aSelections.Add(ListBox_GetCurSel(GetHwnd()));
14483330 485
f6bcfd97 486 return aSelections.Count();
dd3c394a 487 }
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488}
489
490// Get single selection, for single choice list items
14483330 491int wxListBox::GetSelection() const
2bda0e17 492{
2ee3ee1b 493 wxCHECK_MSG( !HasMultipleSelection(),
dd3c394a 494 -1,
f6bcfd97 495 wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") );
14483330 496
a23fd0e1 497 return ListBox_GetCurSel(GetHwnd());
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498}
499
500// Find string for position
debe6624 501wxString wxListBox::GetString(int N) const
2bda0e17 502{
dd3c394a 503 wxCHECK_MSG( N >= 0 && N < m_noItems, "",
223d09f6 504 wxT("invalid index in wxListBox::GetClientData") );
dd3c394a 505
a23fd0e1 506 int len = ListBox_GetTextLen(GetHwnd(), N);
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507
508 // +1 for terminating NUL
509 wxString result;
a23fd0e1 510 ListBox_GetText(GetHwnd(), N, result.GetWriteBuf(len + 1));
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511 result.UngetWriteBuf();
512
513 return result;
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514}
515
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516void
517wxListBox::DoInsertItems(const wxArrayString& items, int pos)
518{
519 wxCHECK_RET( pos >= 0 && pos <= m_noItems,
520 wxT("invalid index in wxListBox::InsertItems") );
521
522 int nItems = items.GetCount();
523 for ( int i = 0; i < nItems; i++ )
524 ListBox_InsertString(GetHwnd(), i + pos, items[i]);
525 m_noItems += nItems;
526
527 SetHorizontalExtent();
528}
529
530void wxListBox::SetString(int N, const wxString& s)
531{
532 wxCHECK_RET( N >= 0 && N < m_noItems,
533 wxT("invalid index in wxListBox::SetString") );
534
535 // remember the state of the item
536 bool wasSelected = IsSelected(N);
537
538 void *oldData = NULL;
539 wxClientData *oldObjData = NULL;
1e6feb95 540 if ( m_clientDataItemsType == wxClientData_Void )
2ee3ee1b 541 oldData = GetClientData(N);
1e6feb95 542 else if ( m_clientDataItemsType == wxClientData_Object )
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543 oldObjData = GetClientObject(N);
544
545 // delete and recreate it
546 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
547
548 int newN = N;
549 if ( N == m_noItems - 1 )
550 newN = -1;
551
552 ListBox_InsertString(GetHwnd(), newN, s);
553
554 // restore the client data
555 if ( oldData )
556 SetClientData(N, oldData);
557 else if ( oldObjData )
558 SetClientObject(N, oldObjData);
559
560 // we may have lost the selection
561 if ( wasSelected )
562 Select(N);
563
564#if wxUSE_OWNER_DRAWN
565 if ( m_windowStyle & wxLB_OWNERDRAW )
566 // update item's text
567 m_aItems[N]->SetName(s);
568#endif //USE_OWNER_DRAWN
569}
570
571int wxListBox::GetCount() const
572{
573 return m_noItems;
574}
575
576// ----------------------------------------------------------------------------
577// helpers
578// ----------------------------------------------------------------------------
579
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580// Windows-specific code to set the horizontal extent of the listbox, if
581// necessary. If s is non-NULL, it's used to calculate the horizontal extent.
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582// Otherwise, all strings are used.
583void wxListBox::SetHorizontalExtent(const wxString& s)
584{
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585 // Only necessary if we want a horizontal scrollbar
586 if (!(m_windowStyle & wxHSCROLL))
587 return;
588 TEXTMETRIC lpTextMetric;
589
2ee3ee1b 590 if ( !s.IsEmpty() )
2bda0e17 591 {
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592 int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
593 HDC dc = GetWindowDC(GetHwnd());
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594 HFONT oldFont = 0;
595 if (GetFont().Ok() && GetFont().GetResourceHandle())
596 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
597
598 GetTextMetrics(dc, &lpTextMetric);
599 SIZE extentXY;
837e5743 600 ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
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601 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
602
603 if (oldFont)
604 ::SelectObject(dc, oldFont);
605
a23fd0e1 606 ReleaseDC(GetHwnd(), dc);
dd3c394a 607 if (extentX > existingExtent)
a23fd0e1 608 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
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609 }
610 else
611 {
612 int largestExtent = 0;
a23fd0e1 613 HDC dc = GetWindowDC(GetHwnd());
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614 HFONT oldFont = 0;
615 if (GetFont().Ok() && GetFont().GetResourceHandle())
616 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
617
618 GetTextMetrics(dc, &lpTextMetric);
619 int i;
620 for (i = 0; i < m_noItems; i++)
621 {
a23fd0e1 622 int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LONG)wxBuffer);
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623 wxBuffer[len] = 0;
624 SIZE extentXY;
837e5743 625 ::GetTextExtentPoint(dc, (LPTSTR)wxBuffer, len, &extentXY);
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626 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
627 if (extentX > largestExtent)
628 largestExtent = extentX;
629 }
630 if (oldFont)
631 ::SelectObject(dc, oldFont);
632
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633 ReleaseDC(GetHwnd(), dc);
634 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
2bda0e17 635 }
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636}
637
f68586e5 638wxSize wxListBox::DoGetBestSize() const
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639{
640 // find the widest string
641 int wLine;
642 int wListbox = 0;
643 for ( int i = 0; i < m_noItems; i++ )
644 {
645 wxString str(GetString(i));
646 GetTextExtent(str, &wLine, NULL);
647 if ( wLine > wListbox )
648 wListbox = wLine;
649 }
650
651 // give it some reasonable default value if there are no strings in the
652 // list
653 if ( wListbox == 0 )
654 wListbox = 100;
655
656 // the listbox should be slightly larger than the widest string
657 int cx, cy;
658 wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
659
660 wListbox += 3*cx;
661
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662 // don't make the listbox too tall (limit height to 10 items) but don't
663 // make it too small neither
664 int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*
665 wxMin(wxMax(m_noItems, 3), 10);
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666
667 return wxSize(wListbox, hListbox);
668}
669
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670// ----------------------------------------------------------------------------
671// callbacks
672// ----------------------------------------------------------------------------
673
674bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
2bda0e17 675{
bada28f0 676 wxEventType evtType;
8ee9d618 677 if ( param == LBN_SELCHANGE )
2bda0e17 678 {
bada28f0 679 evtType = wxEVT_COMMAND_LISTBOX_SELECTED;
2bda0e17 680 }
8ee9d618 681 else if ( param == LBN_DBLCLK )
2ee3ee1b 682 {
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683 evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
684 }
685 else
686 {
687 // some event we're not interested in
688 return FALSE;
689 }
690
691 wxCommandEvent event(evtType, m_windowId);
692 event.SetEventObject( this );
8ee9d618 693
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694 wxArrayInt aSelections;
695 int n, count = GetSelections(aSelections);
696 if ( count > 0 )
697 {
698 n = aSelections[0];
699 if ( HasClientObjectData() )
700 event.SetClientObject( GetClientObject(n) );
701 else if ( HasClientUntypedData() )
702 event.SetClientData( GetClientData(n) );
703 event.SetString( GetString(n) );
2ee3ee1b 704 }
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705 else
706 {
707 n = -1;
708 }
709
710 event.m_commandInt = n;
2ee3ee1b 711
bada28f0 712 return GetEventHandler()->ProcessEvent(event);
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713}
714
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715// ----------------------------------------------------------------------------
716// wxCheckListBox support
717// ----------------------------------------------------------------------------
2bda0e17 718
47d67540 719#if wxUSE_OWNER_DRAWN
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720
721// drawing
722// -------
723
724// space beneath/above each row in pixels
725// "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
726#define OWNER_DRAWN_LISTBOX_EXTRA_SPACE (1)
727
728// the height is the same for all items
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729// TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
730
731// NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
732// message is not yet sent when we get here!
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733bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
734{
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735 // only owner-drawn control should receive this message
736 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
2bda0e17 737
dd3c394a 738 MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
2bda0e17 739
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740 HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0);
741
dd3c394a 742 wxDC dc;
07cf98cb 743 dc.SetHDC((WXHDC)hdc);
dd3c394a 744 dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_ANSI_VAR_FONT));
2bda0e17 745
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746 pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
747 pStruct->itemWidth = dc.GetCharWidth();
2bda0e17 748
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749 dc.SetHDC(0);
750
751 DeleteDC(hdc);
752
dd3c394a 753 return TRUE;
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754}
755
756// forward the message to the appropriate item
757bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
758{
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759 // only owner-drawn control should receive this message
760 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
761
762 DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
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763 UINT itemID = pStruct->itemID;
764
765 // the item may be -1 for an empty listbox
766 if ( itemID == (UINT)-1 )
767 return FALSE;
dd3c394a 768
a23fd0e1 769 long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
2bda0e17 770
dd3c394a 771 wxCHECK( data && (data != LB_ERR), FALSE );
2bda0e17 772
dd3c394a 773 wxListBoxItem *pItem = (wxListBoxItem *)data;
2bda0e17 774
7561aacd 775 wxDCTemp dc((WXHDC)pStruct->hDC);
dd3c394a 776 wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
f6bcfd97 777 wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
2bda0e17 778
dd3c394a 779 return pItem->OnDrawItem(dc, rect,
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780 (wxOwnerDrawn::wxODAction)pStruct->itemAction,
781 (wxOwnerDrawn::wxODStatus)pStruct->itemState);
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782}
783
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784#endif // wxUSE_OWNER_DRAWN
785
786#endif // wxUSE_LISTBOX