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1///////////////////////////////////////////////////////////////////////////////
2// Name: listbox.cpp
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
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23#include "wx/window.h"
24#include "wx/msw/private.h"
25
2bda0e17 26#ifndef WX_PRECOMP
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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"
2662e49e 32#include "wx/utils.h"
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33#endif
34
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35#include <windowsx.h>
36
37#ifdef __WXWINE__
38 #if defined(GetWindowStyle)
39 #undef GetWindowStyle
40 #endif
41#endif
42
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43#include "wx/dynarray.h"
44#include "wx/log.h"
2bda0e17 45
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46#if wxUSE_OWNER_DRAWN
47 #include "wx/ownerdrw.h"
48#endif
2bda0e17 49
57c208c5 50#ifndef __TWIN32__
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51 #ifdef __GNUWIN32_OLD__
52 #include "wx/msw/gnuwin32/extra.h"
dd3c394a 53 #endif
57c208c5 54#endif
2bda0e17 55
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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
14483330 82
dd3c394a 83 IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
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84
85// ============================================================================
86// list box item declaration and implementation
87// ============================================================================
88
47d67540 89#if wxUSE_OWNER_DRAWN
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90
91class wxListBoxItem : public wxOwnerDrawn
92{
93public:
dd3c394a 94 wxListBoxItem(const wxString& str = "");
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95};
96
dd3c394a 97wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, FALSE)
2bda0e17 98{
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99 // no bitmaps/checkmarks
100 SetMarginWidth(0);
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101}
102
c86f1403 103wxOwnerDrawn *wxListBox::CreateItem(size_t n)
2bda0e17 104{
dd3c394a 105 return new wxListBoxItem();
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106}
107
108#endif //USE_OWNER_DRAWN
109
110// ============================================================================
111// list box control implementation
112// ============================================================================
113
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114// ----------------------------------------------------------------------------
115// creation
116// ----------------------------------------------------------------------------
dd3c394a 117
2ee3ee1b 118// Listbox item
bfc6fde4 119wxListBox::wxListBox()
2bda0e17 120{
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121 m_noItems = 0;
122 m_selected = 0;
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123}
124
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125bool wxListBox::Create(wxWindow *parent,
126 wxWindowID id,
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127 const wxPoint& pos,
128 const wxSize& size,
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129 int n, const wxString choices[],
130 long style,
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131 const wxValidator& validator,
132 const wxString& name)
133{
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134 m_noItems = 0;
135 m_hWnd = 0;
136 m_selected = 0;
2bda0e17 137
dd3c394a 138 SetName(name);
11b6a93b 139#if wxUSE_VALIDATORS
dd3c394a 140 SetValidator(validator);
11b6a93b 141#endif // wxUSE_VALIDATORS
2bda0e17 142
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143 if (parent)
144 parent->AddChild(this);
2bda0e17 145
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146 wxSystemSettings settings;
147 SetBackgroundColour(settings.GetSystemColour(wxSYS_COLOUR_WINDOW));
148 SetForegroundColour(parent->GetForegroundColour());
2bda0e17 149
dd3c394a 150 m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
2bda0e17 151
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152 int x = pos.x;
153 int y = pos.y;
154 int width = size.x;
155 int height = size.y;
156 m_windowStyle = style;
2bda0e17 157
42e69d6b 158 DWORD wstyle = WS_VISIBLE | WS_VSCROLL | WS_TABSTOP |
f6bcfd97 159 LBS_NOTIFY | LBS_HASSTRINGS /* | WS_CLIPSIBLINGS */;
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160 if (m_windowStyle & wxLB_MULTIPLE)
161 wstyle |= LBS_MULTIPLESEL;
162 else if (m_windowStyle & wxLB_EXTENDED)
163 wstyle |= LBS_EXTENDEDSEL;
2bda0e17 164
dd3c394a 165 if (m_windowStyle & wxLB_ALWAYS_SB)
2ee3ee1b 166 wstyle |= LBS_DISABLENOSCROLL;
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167 if (m_windowStyle & wxLB_HSCROLL)
168 wstyle |= WS_HSCROLL;
169 if (m_windowStyle & wxLB_SORT)
170 wstyle |= LBS_SORT;
2bda0e17 171
47d67540 172#if wxUSE_OWNER_DRAWN
2bda0e17 173 if ( m_windowStyle & wxLB_OWNERDRAW ) {
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174 // we don't support LBS_OWNERDRAWVARIABLE yet
175 wstyle |= LBS_OWNERDRAWFIXED;
2bda0e17 176 }
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177#endif
178
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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;
2ee3ee1b 184 WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
2bda0e17 185
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186 // Even with extended styles, need to combine with WS_BORDER for them to
187 // look right.
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188 if ( want3D || wxStyleHasBorder(m_windowStyle) )
189 {
190 wstyle |= WS_BORDER;
191 }
2bda0e17 192
223d09f6 193 m_hWnd = (WXHWND)::CreateWindowEx(exStyle, wxT("LISTBOX"), NULL,
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194 wstyle | WS_CHILD,
195 0, 0, 0, 0,
196 (HWND)parent->GetHWND(), (HMENU)m_windowId,
197 wxGetInstance(), NULL);
1c089c47 198
223d09f6 199 wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create listbox") );
1c089c47 200
1f112209 201#if wxUSE_CTL3D
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202 if (want3D)
203 {
a23fd0e1 204 Ctl3dSubclassCtl(GetHwnd());
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205 m_useCtl3D = TRUE;
206 }
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207#endif
208
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209 // Subclass again to catch messages
210 SubclassWin(m_hWnd);
2bda0e17 211
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212 size_t ui;
213 for (ui = 0; ui < (size_t)n; ui++) {
214 Append(choices[ui]);
2bda0e17 215 }
2bda0e17 216
dd3c394a 217 if ( (m_windowStyle & wxLB_MULTIPLE) == 0 )
a23fd0e1 218 SendMessage(GetHwnd(), LB_SETCURSEL, 0, 0);
2bda0e17 219
dd3c394a 220 SetFont(parent->GetFont());
2bda0e17 221
dd3c394a 222 SetSize(x, y, width, height);
2bda0e17 223
dd3c394a 224 return TRUE;
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225}
226
bfc6fde4 227wxListBox::~wxListBox()
2bda0e17 228{
baccb514 229 Free();
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230}
231
bfc6fde4 232void wxListBox::SetupColours()
2bda0e17 233{
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234 SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
235 SetForegroundColour(GetParent()->GetForegroundColour());
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236}
237
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238// ----------------------------------------------------------------------------
239// implementation of wxListBoxBase methods
240// ----------------------------------------------------------------------------
241
242void wxListBox::DoSetFirstItem(int N)
2bda0e17 243{
dd3c394a 244 wxCHECK_RET( N >= 0 && N < m_noItems,
223d09f6 245 wxT("invalid index in wxListBox::SetFirstItem") );
dd3c394a 246
2ee3ee1b 247 SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
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248}
249
debe6624 250void wxListBox::Delete(int N)
2bda0e17 251{
dd3c394a 252 wxCHECK_RET( N >= 0 && N < m_noItems,
223d09f6 253 wxT("invalid index in wxListBox::Delete") );
dd3c394a 254
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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 }
6c8a980f 264
a23fd0e1 265 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
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266 m_noItems--;
267
268 SetHorizontalExtent("");
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269}
270
2ee3ee1b 271int wxListBox::DoAppend(const wxString& item)
2bda0e17 272{
a23fd0e1 273 int index = ListBox_AddString(GetHwnd(), item);
2ee3ee1b 274 m_noItems++;
2bda0e17 275
47d67540 276#if wxUSE_OWNER_DRAWN
2bda0e17 277 if ( m_windowStyle & wxLB_OWNERDRAW ) {
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278 wxOwnerDrawn *pNewItem = CreateItem(index); // dummy argument
279 pNewItem->SetName(item);
280 m_aItems.Add(pNewItem);
a23fd0e1 281 ListBox_SetItemData(GetHwnd(), index, pNewItem);
60c65519 282 pNewItem->SetFont(GetFont());
2bda0e17 283 }
1c089c47 284#endif
2bda0e17 285
dd3c394a 286 SetHorizontalExtent(item);
dd3c394a 287
2ee3ee1b 288 return index;
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289}
290
2ee3ee1b 291void wxListBox::DoSetItems(const wxArrayString& choices, void** clientData)
2bda0e17 292{
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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 }
2ee3ee1b 299
a23fd0e1 300 ListBox_ResetContent(GetHwnd());
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301
302 m_noItems = choices.GetCount();
dd3c394a 303 int i;
2ee3ee1b 304 for (i = 0; i < m_noItems; i++)
dd3c394a 305 {
a23fd0e1 306 ListBox_AddString(GetHwnd(), choices[i]);
dd3c394a 307 if ( clientData )
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308 {
309#if wxUSE_OWNER_DRAWN
d9a012ad 310 wxASSERT_MSG(clientData[i] == NULL,
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311 wxT("Can't use client data with owner-drawn listboxes"));
312#else // !wxUSE_OWNER_DRAWN
a23fd0e1 313 ListBox_SetItemData(GetHwnd(), i, clientData[i]);
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314#endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
315 }
dd3c394a 316 }
2bda0e17 317
47d67540 318#if wxUSE_OWNER_DRAWN
2bda0e17 319 if ( m_windowStyle & wxLB_OWNERDRAW ) {
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320 // first delete old items
321 size_t ui = m_aItems.Count();
322 while ( ui-- != 0 ) {
323 delete m_aItems[ui];
324 }
325 m_aItems.Empty();
326
327 // then create new ones
2ee3ee1b 328 for ( ui = 0; ui < (size_t)m_noItems; ui++ ) {
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329 wxOwnerDrawn *pNewItem = CreateItem(ui);
330 pNewItem->SetName(choices[ui]);
331 m_aItems.Add(pNewItem);
a23fd0e1 332 ListBox_SetItemData(GetHwnd(), ui, pNewItem);
dd3c394a 333 }
2bda0e17 334 }
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335#endif // wxUSE_OWNER_DRAWN
336
337 SetHorizontalExtent();
2bda0e17 338
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339 if ( hideAndShow )
340 {
341 // show the listbox back if we hid it
342 ShowWindow(GetHwnd(), SW_SHOW);
343 }
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344}
345
346int wxListBox::FindString(const wxString& s) const
347{
a23fd0e1 348 int pos = ListBox_FindStringExact(GetHwnd(), (WPARAM)-1, s);
dd3c394a 349 if (pos == LB_ERR)
2ee3ee1b 350 return wxNOT_FOUND;
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351 else
352 return pos;
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353}
354
bfc6fde4 355void wxListBox::Clear()
2bda0e17 356{
baccb514 357 Free();
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358
359 ListBox_ResetContent(GetHwnd());
360
361 m_noItems = 0;
362 SetHorizontalExtent();
363}
364
365void wxListBox::Free()
2b273975 366{
dd3c394a 367#if wxUSE_OWNER_DRAWN
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368 if ( m_windowStyle & wxLB_OWNERDRAW )
369 {
370 size_t uiCount = m_aItems.Count();
371 while ( uiCount-- != 0 ) {
372 delete m_aItems[uiCount];
373 }
dd3c394a 374
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375 m_aItems.Clear();
376 }
377 else
378#endif // wxUSE_OWNER_DRAWN
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379 if ( HasClientObjectData() )
380 {
381 for ( size_t n = 0; n < (size_t)m_noItems; n++ )
382 {
383 delete GetClientObject(n);
384 }
385 }
2bda0e17 386}
baccb514 387
debe6624 388void wxListBox::SetSelection(int N, bool select)
2bda0e17 389{
dd3c394a 390 wxCHECK_RET( N >= 0 && N < m_noItems,
223d09f6 391 wxT("invalid index in wxListBox::SetSelection") );
dd3c394a 392
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393 if ( HasMultipleSelection() )
394 {
a23fd0e1 395 SendMessage(GetHwnd(), LB_SETSEL, select, N);
2ee3ee1b 396 }
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397 else
398 {
2ee3ee1b 399 SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
dd3c394a 400 }
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401}
402
2ee3ee1b 403bool wxListBox::IsSelected(int N) const
2bda0e17 404{
dd3c394a 405 wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
223d09f6 406 wxT("invalid index in wxListBox::Selected") );
dd3c394a 407
a23fd0e1 408 return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
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409}
410
6c8a980f 411wxClientData* wxListBox::DoGetItemClientObject(int n) const
2bda0e17 412{
6c8a980f 413 return (wxClientData *)DoGetItemClientData(n);
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414}
415
6c8a980f 416void *wxListBox::DoGetItemClientData(int n) const
2bda0e17 417{
2ee3ee1b 418 wxCHECK_MSG( n >= 0 && n < m_noItems, NULL,
223d09f6 419 wxT("invalid index in wxListBox::GetClientData") );
dd3c394a 420
2ee3ee1b 421 return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
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422}
423
6c8a980f 424void wxListBox::DoSetItemClientObject(int n, wxClientData* clientData)
2bda0e17 425{
6c8a980f 426 DoSetItemClientData(n, clientData);
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427}
428
6c8a980f 429void wxListBox::DoSetItemClientData(int n, void *clientData)
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430{
431 wxCHECK_RET( n >= 0 && n < m_noItems,
223d09f6 432 wxT("invalid index in wxListBox::SetClientData") );
dd3c394a 433
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434#if wxUSE_OWNER_DRAWN
435 if ( m_windowStyle & wxLB_OWNERDRAW )
436 {
437 // client data must be pointer to wxOwnerDrawn, otherwise we would crash
438 // in OnMeasure/OnDraw.
439 wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
440 }
441#endif // wxUSE_OWNER_DRAWN
442
443 if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
223d09f6 444 wxLogDebug(wxT("LB_SETITEMDATA failed"));
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445}
446
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447bool wxListBox::HasMultipleSelection() const
448{
449 return (m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED);
450}
451
2bda0e17 452// Return number of selections and an array of selected integers
14483330 453int wxListBox::GetSelections(wxArrayInt& aSelections) const
2bda0e17 454{
dd3c394a 455 aSelections.Empty();
14483330 456
2ee3ee1b 457 if ( HasMultipleSelection() )
dd3c394a 458 {
a23fd0e1 459 int no_sel = ListBox_GetSelCount(GetHwnd());
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460 if (no_sel != 0) {
461 int *selections = new int[no_sel];
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462 int rc = ListBox_GetSelItems(GetHwnd(), no_sel, selections);
463
464 wxCHECK_MSG(rc != LB_ERR, -1, wxT("ListBox_GetSelItems failed"));
14483330 465
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466 aSelections.Alloc(no_sel);
467 for ( int n = 0; n < no_sel; n++ )
468 aSelections.Add(selections[n]);
14483330 469
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470 delete [] selections;
471 }
14483330 472
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473 return no_sel;
474 }
475 else // single-selection listbox
476 {
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477 if (ListBox_GetCurSel(GetHwnd()) > -1)
478 aSelections.Add(ListBox_GetCurSel(GetHwnd()));
14483330 479
f6bcfd97 480 return aSelections.Count();
dd3c394a 481 }
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482}
483
484// Get single selection, for single choice list items
14483330 485int wxListBox::GetSelection() const
2bda0e17 486{
2ee3ee1b 487 wxCHECK_MSG( !HasMultipleSelection(),
dd3c394a 488 -1,
f6bcfd97 489 wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") );
14483330 490
a23fd0e1 491 return ListBox_GetCurSel(GetHwnd());
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492}
493
494// Find string for position
debe6624 495wxString wxListBox::GetString(int N) const
2bda0e17 496{
dd3c394a 497 wxCHECK_MSG( N >= 0 && N < m_noItems, "",
223d09f6 498 wxT("invalid index in wxListBox::GetClientData") );
dd3c394a 499
a23fd0e1 500 int len = ListBox_GetTextLen(GetHwnd(), N);
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501
502 // +1 for terminating NUL
503 wxString result;
a23fd0e1 504 ListBox_GetText(GetHwnd(), N, result.GetWriteBuf(len + 1));
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505 result.UngetWriteBuf();
506
507 return result;
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508}
509
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510void
511wxListBox::DoInsertItems(const wxArrayString& items, int pos)
512{
513 wxCHECK_RET( pos >= 0 && pos <= m_noItems,
514 wxT("invalid index in wxListBox::InsertItems") );
515
516 int nItems = items.GetCount();
517 for ( int i = 0; i < nItems; i++ )
518 ListBox_InsertString(GetHwnd(), i + pos, items[i]);
519 m_noItems += nItems;
520
521 SetHorizontalExtent();
522}
523
524void wxListBox::SetString(int N, const wxString& s)
525{
526 wxCHECK_RET( N >= 0 && N < m_noItems,
527 wxT("invalid index in wxListBox::SetString") );
528
529 // remember the state of the item
530 bool wasSelected = IsSelected(N);
531
532 void *oldData = NULL;
533 wxClientData *oldObjData = NULL;
534 if ( m_clientDataItemsType == ClientData_Void )
535 oldData = GetClientData(N);
536 else if ( m_clientDataItemsType == ClientData_Object )
537 oldObjData = GetClientObject(N);
538
539 // delete and recreate it
540 SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
541
542 int newN = N;
543 if ( N == m_noItems - 1 )
544 newN = -1;
545
546 ListBox_InsertString(GetHwnd(), newN, s);
547
548 // restore the client data
549 if ( oldData )
550 SetClientData(N, oldData);
551 else if ( oldObjData )
552 SetClientObject(N, oldObjData);
553
554 // we may have lost the selection
555 if ( wasSelected )
556 Select(N);
557
558#if wxUSE_OWNER_DRAWN
559 if ( m_windowStyle & wxLB_OWNERDRAW )
560 // update item's text
561 m_aItems[N]->SetName(s);
562#endif //USE_OWNER_DRAWN
563}
564
565int wxListBox::GetCount() const
566{
567 return m_noItems;
568}
569
570// ----------------------------------------------------------------------------
571// helpers
572// ----------------------------------------------------------------------------
573
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574// Windows-specific code to set the horizontal extent of the listbox, if
575// necessary. If s is non-NULL, it's used to calculate the horizontal extent.
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576// Otherwise, all strings are used.
577void wxListBox::SetHorizontalExtent(const wxString& s)
578{
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579 // Only necessary if we want a horizontal scrollbar
580 if (!(m_windowStyle & wxHSCROLL))
581 return;
582 TEXTMETRIC lpTextMetric;
583
2ee3ee1b 584 if ( !s.IsEmpty() )
2bda0e17 585 {
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586 int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
587 HDC dc = GetWindowDC(GetHwnd());
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588 HFONT oldFont = 0;
589 if (GetFont().Ok() && GetFont().GetResourceHandle())
590 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
591
592 GetTextMetrics(dc, &lpTextMetric);
593 SIZE extentXY;
837e5743 594 ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
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595 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
596
597 if (oldFont)
598 ::SelectObject(dc, oldFont);
599
a23fd0e1 600 ReleaseDC(GetHwnd(), dc);
dd3c394a 601 if (extentX > existingExtent)
a23fd0e1 602 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
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603 }
604 else
605 {
606 int largestExtent = 0;
a23fd0e1 607 HDC dc = GetWindowDC(GetHwnd());
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608 HFONT oldFont = 0;
609 if (GetFont().Ok() && GetFont().GetResourceHandle())
610 oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
611
612 GetTextMetrics(dc, &lpTextMetric);
613 int i;
614 for (i = 0; i < m_noItems; i++)
615 {
a23fd0e1 616 int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LONG)wxBuffer);
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617 wxBuffer[len] = 0;
618 SIZE extentXY;
837e5743 619 ::GetTextExtentPoint(dc, (LPTSTR)wxBuffer, len, &extentXY);
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620 int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
621 if (extentX > largestExtent)
622 largestExtent = extentX;
623 }
624 if (oldFont)
625 ::SelectObject(dc, oldFont);
626
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627 ReleaseDC(GetHwnd(), dc);
628 SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
2bda0e17 629 }
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630}
631
f68586e5 632wxSize wxListBox::DoGetBestSize() const
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633{
634 // find the widest string
635 int wLine;
636 int wListbox = 0;
637 for ( int i = 0; i < m_noItems; i++ )
638 {
639 wxString str(GetString(i));
640 GetTextExtent(str, &wLine, NULL);
641 if ( wLine > wListbox )
642 wListbox = wLine;
643 }
644
645 // give it some reasonable default value if there are no strings in the
646 // list
647 if ( wListbox == 0 )
648 wListbox = 100;
649
650 // the listbox should be slightly larger than the widest string
651 int cx, cy;
652 wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
653
654 wListbox += 3*cx;
655
656 int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*(wxMax(m_noItems, 7));
657
658 return wxSize(wListbox, hListbox);
659}
660
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661// ----------------------------------------------------------------------------
662// callbacks
663// ----------------------------------------------------------------------------
664
665bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
2bda0e17 666{
8ee9d618 667 if ( param == LBN_SELCHANGE )
2bda0e17 668 {
2ee3ee1b 669 wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
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670 event.SetEventObject( this );
671
2ee3ee1b 672 wxArrayInt aSelections;
8ee9d618 673 int n, count = GetSelections(aSelections);
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674 if ( count > 0 )
675 {
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676 n = aSelections[0];
677 if ( HasClientObjectData() )
678 event.SetClientObject( GetClientObject(n) );
679 else if ( HasClientUntypedData() )
680 event.SetClientData( GetClientData(n) );
681 event.SetString( GetString(n) );
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682 }
683 else
684 {
8ee9d618 685 n = -1;
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686 }
687
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688 event.m_commandInt = n;
689
690 return GetEventHandler()->ProcessEvent(event);
2bda0e17 691 }
8ee9d618 692 else if ( param == LBN_DBLCLK )
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693 {
694 wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, m_windowId);
695 event.SetEventObject( this );
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696
697 return GetEventHandler()->ProcessEvent(event);
2ee3ee1b 698 }
8ee9d618 699 //else:
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700
701 return FALSE;
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702}
703
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704// ----------------------------------------------------------------------------
705// wxCheckListBox support
706// ----------------------------------------------------------------------------
2bda0e17 707
47d67540 708#if wxUSE_OWNER_DRAWN
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709
710// drawing
711// -------
712
713// space beneath/above each row in pixels
714// "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
715#define OWNER_DRAWN_LISTBOX_EXTRA_SPACE (1)
716
717// the height is the same for all items
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718// TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
719
720// NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
721// message is not yet sent when we get here!
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722bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
723{
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724 // only owner-drawn control should receive this message
725 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
2bda0e17 726
dd3c394a 727 MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
2bda0e17 728
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729 HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0);
730
dd3c394a 731 wxDC dc;
07cf98cb 732 dc.SetHDC((WXHDC)hdc);
dd3c394a 733 dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_ANSI_VAR_FONT));
2bda0e17 734
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735 pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
736 pStruct->itemWidth = dc.GetCharWidth();
2bda0e17 737
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738 dc.SetHDC(0);
739
740 DeleteDC(hdc);
741
dd3c394a 742 return TRUE;
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743}
744
745// forward the message to the appropriate item
746bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
747{
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748 // only owner-drawn control should receive this message
749 wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
750
751 DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
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752 UINT itemID = pStruct->itemID;
753
754 // the item may be -1 for an empty listbox
755 if ( itemID == (UINT)-1 )
756 return FALSE;
dd3c394a 757
a23fd0e1 758 long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
2bda0e17 759
dd3c394a 760 wxCHECK( data && (data != LB_ERR), FALSE );
2bda0e17 761
dd3c394a 762 wxListBoxItem *pItem = (wxListBoxItem *)data;
2bda0e17 763
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764 wxDC dc;
765 dc.SetHDC((WXHDC)pStruct->hDC, FALSE);
766 wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
f6bcfd97 767 wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
2bda0e17 768
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769 return pItem->OnDrawItem(dc, rect,
770 (wxOwnerDrawn::wxODAction)pStruct->itemAction,
771 (wxOwnerDrawn::wxODStatus)pStruct->itemState);
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772}
773
774#endif
dd3c394a 775 // wxUSE_OWNER_DRAWN