src/msw/checklst.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/checklst.cpp
   3 // Purpose:     implementation of wxCheckListBox class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     16.11.97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_CHECKLISTBOX && wxUSE_OWNER_DRAWN
  28
  29 #include "wx/checklst.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/msw/wrapcctl.h"
  33     #include "wx/object.h"
  34     #include "wx/colour.h"
  35     #include "wx/font.h"
  36     #include "wx/bitmap.h"
  37     #include "wx/window.h"
  38     #include "wx/listbox.h"
  39     #include "wx/dcmemory.h"
  40     #include "wx/settings.h"
  41     #include "wx/log.h"
  42 #endif
  43
  44 #include "wx/ownerdrw.h"
  45
  46 #include <windowsx.h>
  47
  48 #include "wx/renderer.h"
  49 #include "wx/msw/private.h"
  50 #include "wx/msw/dc.h"
  51
  52 // ----------------------------------------------------------------------------
  53 // private functions
  54 // ----------------------------------------------------------------------------
  55
  56 // get item (converted to right type)
  57 #define GetItem(n)    ((wxCheckListBoxItem *)(GetItem(n)))
  58
  59 // ============================================================================
  60 // implementation
  61 // ============================================================================
  62
  63
  64 #if wxUSE_EXTENDED_RTTI
  65 WX_DEFINE_FLAGS( wxCheckListBoxStyle )
  66
  67 wxBEGIN_FLAGS( wxCheckListBoxStyle )
  68     // new style border flags, we put them first to
  69     // use them for streaming out
  70     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  71     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  72     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  73     wxFLAGS_MEMBER(wxBORDER_RAISED)
  74     wxFLAGS_MEMBER(wxBORDER_STATIC)
  75     wxFLAGS_MEMBER(wxBORDER_NONE)
  76
  77     // old style border flags
  78     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  79     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  80     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  81     wxFLAGS_MEMBER(wxRAISED_BORDER)
  82     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  83     wxFLAGS_MEMBER(wxBORDER)
  84
  85     // standard window styles
  86     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  87     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  88     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  89     wxFLAGS_MEMBER(wxWANTS_CHARS)
  90     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  91     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  92     wxFLAGS_MEMBER(wxVSCROLL)
  93     wxFLAGS_MEMBER(wxHSCROLL)
  94
  95     wxFLAGS_MEMBER(wxLB_SINGLE)
  96     wxFLAGS_MEMBER(wxLB_MULTIPLE)
  97     wxFLAGS_MEMBER(wxLB_EXTENDED)
  98     wxFLAGS_MEMBER(wxLB_HSCROLL)
  99     wxFLAGS_MEMBER(wxLB_ALWAYS_SB)
 100     wxFLAGS_MEMBER(wxLB_NEEDED_SB)
 101     wxFLAGS_MEMBER(wxLB_SORT)
 102     wxFLAGS_MEMBER(wxLB_OWNERDRAW)
 103
 104 wxEND_FLAGS( wxCheckListBoxStyle )
 105
 106 IMPLEMENT_DYNAMIC_CLASS_XTI(wxCheckListBox, wxListBox,"wx/checklst.h")
 107
 108 wxBEGIN_PROPERTIES_TABLE(wxCheckListBox)
 109     wxEVENT_PROPERTY( Toggle , wxEVT_COMMAND_CHECKLISTBOX_TOGGLED , wxCommandEvent )
 110     wxPROPERTY_FLAGS( WindowStyle , wxCheckListBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , wxLB_OWNERDRAW /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 111 wxEND_PROPERTIES_TABLE()
 112
 113 wxBEGIN_HANDLERS_TABLE(wxCheckListBox)
 114 wxEND_HANDLERS_TABLE()
 115
 116 wxCONSTRUCTOR_4( wxCheckListBox , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
 117
 118 #else
 119 IMPLEMENT_DYNAMIC_CLASS(wxCheckListBox, wxListBox)
 120 #endif
 121
 122 // ----------------------------------------------------------------------------
 123 // declaration and implementation of wxCheckListBoxItem class
 124 // ----------------------------------------------------------------------------
 125
 126 class wxCheckListBoxItem : public wxOwnerDrawn
 127 {
 128 friend class WXDLLIMPEXP_FWD_CORE wxCheckListBox;
 129 public:
 130     // ctor
 131     wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex);
 132
 133     // drawing functions
 134     virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
 135
 136     // simple accessors and operations
 137     bool IsChecked() const { return m_bChecked; }
 138
 139     void Check(bool bCheck);
 140     void Toggle() { Check(!IsChecked()); }
 141
 142     void SendEvent();
 143
 144 private:
 145     bool            m_bChecked;
 146     wxCheckListBox *m_pParent;
 147     size_t          m_nIndex;
 148
 149     DECLARE_NO_COPY_CLASS(wxCheckListBoxItem)
 150 };
 151
 152 wxCheckListBoxItem::wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex)
 153                   : wxOwnerDrawn(wxEmptyString, true)   // checkable
 154 {
 155     m_bChecked = false;
 156     m_pParent  = pParent;
 157     m_nIndex   = nIndex;
 158
 159     // we don't initialize m_nCheckHeight/Width vars because it's
 160     // done in OnMeasure while they are used only in OnDraw and we
 161     // know that there will always be OnMeasure before OnDraw
 162
 163     SetMarginWidth(::GetSystemMetrics(SM_CXMENUCHECK) - 2);
 164
 165     SetBackgroundColour(pParent->GetBackgroundColour());
 166 }
 167
 168 bool wxCheckListBoxItem::OnDrawItem(wxDC& dc, const wxRect& rc,
 169                                     wxODAction act, wxODStatus stat)
 170 {
 171     // first draw the label
 172     if ( IsChecked() )
 173         stat = (wxOwnerDrawn::wxODStatus)(stat | wxOwnerDrawn::wxODChecked);
 174
 175     if ( !wxOwnerDrawn::OnDrawItem(dc, rc, act, stat) )
 176         return false;
 177
 178     wxMSWDCImpl *impl = (wxMSWDCImpl*) dc.GetImpl();
 179     // now draw the check mark part
 180     HDC hdc = GetHdcOf(*impl);
 181
 182     int nBmpWidth  = ::GetSystemMetrics(SM_CXMENUCHECK),
 183         nBmpHeight = ::GetSystemMetrics(SM_CYMENUCHECK);
 184
 185
 186     // first create bitmap in a memory DC
 187     MemoryHDC hdcMem(hdc);
 188     CompatibleBitmap hBmpCheck(hdc, nBmpWidth, nBmpHeight);
 189
 190     // then draw a check mark into it
 191     {
 192         SelectInHDC selBmp(hdcMem, hBmpCheck);
 193
 194         int flags = wxCONTROL_FLAT;
 195         if ( IsChecked() )
 196             flags |= wxCONTROL_CHECKED;
 197
 198         wxDCTemp dcMem(hdcMem);
 199         wxRendererNative::Get().DrawCheckBox(
 200                 m_pParent, dcMem, wxRect(0, 0, nBmpWidth, nBmpHeight), flags);
 201     } // select hBmpCheck out of hdcMem
 202
 203     // shift check mark 2 pixel to the right and bottom, looks better like this
 204     int x = rc.GetX() + 2,
 205         y = rc.GetY() + 2;
 206
 207     // finally draw bitmap to screen: uses image list functions to blend
 208     // the bitmap with the background colour (better for the selected items)
 209     HIMAGELIST himl = ImageList_Create(nBmpWidth, nBmpHeight,
 210                                        ILC_COLOR32 | ILC_MASK, 1, 1);
 211     ImageList_Add(himl, hBmpCheck, NULL);
 212
 213     UINT fStyle = stat & wxOwnerDrawn::wxODSelected ? ILD_SELECTED : ILD_NORMAL;
 214     ImageList_Draw(himl, 0, hdc, x, y, fStyle);
 215
 216     ImageList_Destroy(himl);
 217
 218     return true;
 219 }
 220
 221 // change the state of the item and redraw it
 222 void wxCheckListBoxItem::Check(bool check)
 223 {
 224     m_bChecked = check;
 225
 226     // index may be changed because new items were added/deleted
 227     if ( m_pParent->GetItemIndex(this) != (int)m_nIndex )
 228     {
 229         // update it
 230         int index = m_pParent->GetItemIndex(this);
 231
 232         wxASSERT_MSG( index != wxNOT_FOUND, wxT("what does this item do here?") );
 233
 234         m_nIndex = (size_t)index;
 235     }
 236
 237     HWND hwndListbox = (HWND)m_pParent->GetHWND();
 238
 239     RECT rcUpdate;
 240
 241     if ( ::SendMessage(hwndListbox, LB_GETITEMRECT,
 242                        m_nIndex, (LPARAM)&rcUpdate) == LB_ERR )
 243     {
 244         wxLogDebug(wxT("LB_GETITEMRECT failed"));
 245     }
 246
 247     ::InvalidateRect(hwndListbox, &rcUpdate, FALSE);
 248 }
 249
 250 // send an "item checked" event
 251 void wxCheckListBoxItem::SendEvent()
 252 {
 253     wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
 254     event.SetInt(m_nIndex);
 255     event.SetEventObject(m_pParent);
 256     event.SetString(m_pParent->GetString(m_nIndex));
 257     m_pParent->ProcessCommand(event);
 258 }
 259
 260 // ----------------------------------------------------------------------------
 261 // implementation of wxCheckListBox class
 262 // ----------------------------------------------------------------------------
 263
 264 // define event table
 265 // ------------------
 266 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
 267   EVT_KEY_DOWN(wxCheckListBox::OnKeyDown)
 268   EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
 269 END_EVENT_TABLE()
 270
 271 // control creation
 272 // ----------------
 273
 274 // def ctor: use Create() to really create the control
 275 wxCheckListBox::wxCheckListBox()
 276 {
 277 }
 278
 279 // ctor which creates the associated control
 280 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 281                                const wxPoint& pos, const wxSize& size,
 282                                int nStrings, const wxString choices[],
 283                                long style, const wxValidator& val,
 284                                const wxString& name)
 285 {
 286     Create(parent, id, pos, size, nStrings, choices, style, val, name);
 287 }
 288
 289 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 290                                const wxPoint& pos, const wxSize& size,
 291                                const wxArrayString& choices,
 292                                long style, const wxValidator& val,
 293                                const wxString& name)
 294 {
 295     Create(parent, id, pos, size, choices, style, val, name);
 296 }
 297
 298 bool wxCheckListBox::Create(wxWindow *parent, wxWindowID id,
 299                             const wxPoint& pos, const wxSize& size,
 300                             int n, const wxString choices[],
 301                             long style,
 302                             const wxValidator& validator, const wxString& name)
 303 {
 304     return wxListBox::Create(parent, id, pos, size, n, choices,
 305                              style | wxLB_OWNERDRAW, validator, name);
 306 }
 307
 308 bool wxCheckListBox::Create(wxWindow *parent, wxWindowID id,
 309                             const wxPoint& pos, const wxSize& size,
 310                             const wxArrayString& choices,
 311                             long style,
 312                             const wxValidator& validator, const wxString& name)
 313 {
 314     return wxListBox::Create(parent, id, pos, size, choices,
 315                              style | wxLB_OWNERDRAW, validator, name);
 316 }
 317
 318 // misc overloaded methods
 319 // -----------------------
 320
 321 void wxCheckListBox::Delete(unsigned int n)
 322 {
 323     wxCHECK_RET( IsValid(n),
 324                  wxT("invalid index in wxListBox::Delete") );
 325
 326     wxListBox::Delete(n);
 327
 328     // free memory
 329     delete m_aItems[n];
 330
 331     m_aItems.RemoveAt(n);
 332 }
 333
 334 bool wxCheckListBox::SetFont( const wxFont &font )
 335 {
 336     unsigned int i;
 337     for ( i = 0; i < m_aItems.GetCount(); i++ )
 338         m_aItems[i]->SetFont(font);
 339
 340     wxListBox::SetFont(font);
 341
 342     return true;
 343 }
 344
 345 // create/retrieve item
 346 // --------------------
 347
 348 // create a check list box item
 349 wxOwnerDrawn *wxCheckListBox::CreateLboxItem(size_t nIndex)
 350 {
 351   wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
 352   return pItem;
 353 }
 354
 355 // return item size
 356 // ----------------
 357 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 358 {
 359   if ( wxListBox::MSWOnMeasure(item) ) {
 360     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 361
 362     // add place for the check mark
 363     pStruct->itemWidth  += wxOwnerDrawn::GetDefaultMarginWidth();
 364     pStruct->itemHeight += 1;
 365
 366     // save item height
 367     m_nItemHeight = pStruct->itemHeight;
 368
 369     return true;
 370   }
 371
 372   return false;
 373 }
 374
 375 // check items
 376 // -----------
 377
 378 bool wxCheckListBox::IsChecked(unsigned int uiIndex) const
 379 {
 380     wxCHECK_MSG( IsValid(uiIndex), false, _T("bad wxCheckListBox index") );
 381
 382     return GetItem(uiIndex)->IsChecked();
 383 }
 384
 385 void wxCheckListBox::Check(unsigned int uiIndex, bool bCheck)
 386 {
 387     wxCHECK_RET( IsValid(uiIndex), _T("bad wxCheckListBox index") );
 388
 389     GetItem(uiIndex)->Check(bCheck);
 390 }
 391
 392 // process events
 393 // --------------
 394
 395 void wxCheckListBox::OnKeyDown(wxKeyEvent& event)
 396 {
 397     // what do we do?
 398     enum
 399     {
 400         None,
 401         Toggle,
 402         Set,
 403         Clear
 404     } oper;
 405
 406     switch ( event.GetKeyCode() )
 407     {
 408         case WXK_SPACE:
 409             oper = Toggle;
 410             break;
 411
 412         case WXK_NUMPAD_ADD:
 413         case '+':
 414             oper = Set;
 415             break;
 416
 417         case WXK_NUMPAD_SUBTRACT:
 418         case '-':
 419             oper = Clear;
 420             break;
 421
 422         default:
 423             oper = None;
 424     }
 425
 426     if ( oper != None )
 427     {
 428         wxArrayInt selections;
 429         int count = 0;
 430         if ( HasMultipleSelection() )
 431         {
 432             count = GetSelections(selections);
 433         }
 434         else
 435         {
 436             int sel = GetSelection();
 437             if (sel != -1)
 438             {
 439                 count = 1;
 440                 selections.Add(sel);
 441             }
 442         }
 443
 444         for ( int i = 0; i < count; i++ )
 445         {
 446             wxCheckListBoxItem *item = GetItem(selections[i]);
 447             if ( !item )
 448             {
 449                 wxFAIL_MSG( _T("no wxCheckListBoxItem?") );
 450                 continue;
 451             }
 452
 453             switch ( oper )
 454             {
 455                 case Toggle:
 456                     item->Toggle();
 457                     break;
 458
 459                 case Set:
 460                 case Clear:
 461                     item->Check( oper == Set );
 462                     break;
 463
 464                 default:
 465                     wxFAIL_MSG( _T("what should this key do?") );
 466             }
 467
 468             // we should send an event as this has been done by the user and
 469             // not by the program
 470             item->SendEvent();
 471         }
 472     }
 473     else // nothing to do
 474     {
 475         event.Skip();
 476     }
 477 }
 478
 479 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
 480 {
 481     // clicking on the item selects it, clicking on the checkmark toggles
 482     if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() )
 483     {
 484         int nItem = HitTest(event.GetX(), event.GetY());
 485
 486         if ( nItem != wxNOT_FOUND )
 487         {
 488             // people expect to get "kill focus" event for the currently
 489             // focused control before getting events from the other controls
 490             // and, equally importantly, they may prevent the focus change from
 491             // taking place at all (e.g. because the old control contents is
 492             // invalid and needs to be corrected) in which case we shouldn't
 493             // generate this event at all
 494             SetFocus();
 495             if ( FindFocus() == this )
 496             {
 497                 wxCheckListBoxItem *item = GetItem(nItem);
 498                 item->Toggle();
 499                 item->SendEvent();
 500             }
 501         }
 502         //else: it's not an error, just click outside of client zone
 503     }
 504     else
 505     {
 506         // implement default behaviour: clicking on the item selects it
 507         event.Skip();
 508     }
 509 }
 510
 511 int wxCheckListBox::DoHitTestItem(wxCoord x, wxCoord y) const
 512 {
 513     int nItem = (int)::SendMessage
 514                              (
 515                               (HWND)GetHWND(),
 516                               LB_ITEMFROMPOINT,
 517                               0,
 518                               MAKELPARAM(x, y)
 519                              );
 520
 521     return nItem >= (int)m_noItems ? wxNOT_FOUND : nItem;
 522 }
 523
 524
 525 wxSize wxCheckListBox::DoGetBestSize() const
 526 {
 527     wxSize best = wxListBox::DoGetBestSize();
 528     best.x += wxOwnerDrawn::GetDefaultMarginWidth();  // add room for the checkbox
 529     CacheBestSize(best);
 530     return best;
 531 }
 532
 533 #endif