src/msw/checklst.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21 #pragma implementation "checklst.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28 #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_CHECKLISTBOX && wxUSE_OWNER_DRAWN
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/object.h"
  35     #include "wx/colour.h"
  36     #include "wx/font.h"
  37     #include "wx/bitmap.h"
  38     #include "wx/window.h"
  39     #include "wx/listbox.h"
  40     #include "wx/dcmemory.h"
  41
  42     #include "wx/settings.h"
  43
  44     #include "wx/log.h"
  45 #endif
  46
  47 #include "wx/ownerdrw.h"
  48 #include "wx/checklst.h"
  49
  50 #include "wx/msw/wrapwin.h"
  51 #include <windowsx.h>
  52
  53 #include "wx/msw/private.h"
  54
  55 // ----------------------------------------------------------------------------
  56 // private functions
  57 // ----------------------------------------------------------------------------
  58
  59 // get item (converted to right type)
  60 #define GetItem(n)    ((wxCheckListBoxItem *)(GetItem(n)))
  61
  62 // ============================================================================
  63 // implementation
  64 // ============================================================================
  65
  66
  67 #if wxUSE_EXTENDED_RTTI
  68 WX_DEFINE_FLAGS( wxCheckListBoxStyle )
  69
  70 wxBEGIN_FLAGS( wxCheckListBoxStyle )
  71     // new style border flags, we put them first to
  72     // use them for streaming out
  73     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  74     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  75     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  76     wxFLAGS_MEMBER(wxBORDER_RAISED)
  77     wxFLAGS_MEMBER(wxBORDER_STATIC)
  78     wxFLAGS_MEMBER(wxBORDER_NONE)
  79
  80     // old style border flags
  81     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  82     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  83     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  84     wxFLAGS_MEMBER(wxRAISED_BORDER)
  85     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  86     wxFLAGS_MEMBER(wxBORDER)
  87
  88     // standard window styles
  89     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  90     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  91     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  92     wxFLAGS_MEMBER(wxWANTS_CHARS)
  93     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  94     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  95     wxFLAGS_MEMBER(wxVSCROLL)
  96     wxFLAGS_MEMBER(wxHSCROLL)
  97
  98     wxFLAGS_MEMBER(wxLB_SINGLE)
  99     wxFLAGS_MEMBER(wxLB_MULTIPLE)
 100     wxFLAGS_MEMBER(wxLB_EXTENDED)
 101     wxFLAGS_MEMBER(wxLB_HSCROLL)
 102     wxFLAGS_MEMBER(wxLB_ALWAYS_SB)
 103     wxFLAGS_MEMBER(wxLB_NEEDED_SB)
 104     wxFLAGS_MEMBER(wxLB_SORT)
 105     wxFLAGS_MEMBER(wxLB_OWNERDRAW)
 106
 107 wxEND_FLAGS( wxCheckListBoxStyle )
 108
 109 IMPLEMENT_DYNAMIC_CLASS_XTI(wxCheckListBox, wxListBox,"wx/checklst.h")
 110
 111 wxBEGIN_PROPERTIES_TABLE(wxCheckListBox)
 112     wxEVENT_PROPERTY( Toggle , wxEVT_COMMAND_CHECKLISTBOX_TOGGLED , wxCommandEvent )
 113     wxPROPERTY_FLAGS( WindowStyle , wxCheckListBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , wxLB_OWNERDRAW /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 114 wxEND_PROPERTIES_TABLE()
 115
 116 wxBEGIN_HANDLERS_TABLE(wxCheckListBox)
 117 wxEND_HANDLERS_TABLE()
 118
 119 wxCONSTRUCTOR_4( wxCheckListBox , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
 120
 121 #else
 122 IMPLEMENT_DYNAMIC_CLASS(wxCheckListBox, wxListBox)
 123 #endif
 124
 125 // ----------------------------------------------------------------------------
 126 // declaration and implementation of wxCheckListBoxItem class
 127 // ----------------------------------------------------------------------------
 128
 129 class wxCheckListBoxItem : public wxOwnerDrawn
 130 {
 131 friend class WXDLLEXPORT wxCheckListBox;
 132 public:
 133   // ctor
 134   wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex);
 135
 136   // drawing functions
 137   virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
 138
 139   // simple accessors and operations
 140   bool IsChecked() const { return m_bChecked; }
 141
 142   void Check(bool bCheck);
 143   void Toggle() { Check(!IsChecked()); }
 144
 145   void SendEvent();
 146
 147 private:
 148   bool            m_bChecked;
 149   wxCheckListBox *m_pParent;
 150   size_t          m_nIndex;
 151
 152   DECLARE_NO_COPY_CLASS(wxCheckListBoxItem)
 153 };
 154
 155 wxCheckListBoxItem::wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex)
 156                   : wxOwnerDrawn(wxEmptyString, true)   // checkable
 157 {
 158   m_bChecked = false;
 159   m_pParent  = pParent;
 160   m_nIndex   = nIndex;
 161
 162   // we don't initialize m_nCheckHeight/Width vars because it's
 163   // done in OnMeasure while they are used only in OnDraw and we
 164   // know that there will always be OnMeasure before OnDraw
 165
 166   // fix appearance for check list boxes: they don't look quite the same as
 167   // menu icons
 168   SetMarginWidth(::GetSystemMetrics(SM_CXMENUCHECK) -
 169                     2*wxSystemSettings::GetMetric(wxSYS_EDGE_X) + 1);
 170   SetBackgroundColour(pParent->GetBackgroundColour());
 171 }
 172
 173 bool wxCheckListBoxItem::OnDrawItem(wxDC& dc, const wxRect& rc,
 174                                     wxODAction act, wxODStatus stat)
 175 {
 176     // first draw the label
 177     if ( IsChecked() )
 178         stat = (wxOwnerDrawn::wxODStatus)(stat | wxOwnerDrawn::wxODChecked);
 179
 180     if ( !wxOwnerDrawn::OnDrawItem(dc, rc, act, stat) )
 181         return false;
 182
 183
 184     // now draw the check mark part
 185     size_t nCheckWidth  = GetDefaultMarginWidth(),
 186            nCheckHeight = m_pParent->GetItemHeight();
 187
 188     int x = rc.GetX(),
 189         y = rc.GetY();
 190
 191     HDC hdc = (HDC)dc.GetHDC();
 192
 193     // create pens, brushes &c
 194     COLORREF colBg = ::GetSysColor(COLOR_WINDOW);
 195     AutoHPEN hpenBack(colBg),
 196              hpenGray(RGB(0xc0, 0xc0, 0xc0));
 197
 198     SelectInHDC selPen(hdc, (HGDIOBJ)hpenBack);
 199     AutoHBRUSH hbrBack(colBg);
 200     SelectInHDC selBrush(hdc, hbrBack);
 201
 202     // erase the background: it could have been filled with the selected colour
 203     Rectangle(hdc, x, y, x + nCheckWidth + 1, rc.GetBottom() + 1);
 204
 205     // shift check mark 1 pixel to the right, looks better like this
 206     x++;
 207
 208     if ( IsChecked() )
 209     {
 210         // first create a monochrome bitmap in a memory DC
 211         MemoryHDC hdcMem(hdc);
 212         MonoBitmap hbmpCheck(nCheckWidth, nCheckHeight);
 213         SelectInHDC selBmp(hdcMem, hbmpCheck);
 214
 215         // then draw a check mark into it
 216         RECT rect = { 0, 0, nCheckWidth, nCheckHeight };
 217         ::DrawFrameControl(hdcMem, &rect,
 218 #ifdef __WXWINCE__
 219                            DFC_BUTTON, DFCS_BUTTONCHECK
 220 #else
 221                            DFC_MENU, DFCS_MENUCHECK
 222 #endif
 223                            );
 224
 225         // finally copy it to screen DC
 226         ::BitBlt(hdc, x, y, nCheckWidth, nCheckHeight, hdcMem, 0, 0, SRCCOPY);
 227     }
 228
 229     // now we draw the smaller rectangle
 230     y++;
 231     nCheckWidth  -= 2;
 232     nCheckHeight -= 2;
 233
 234     // draw hollow gray rectangle
 235     (void)::SelectObject(hdc, (HGDIOBJ)hpenGray);
 236
 237     SelectInHDC selBrush2(hdc, ::GetStockObject(NULL_BRUSH));
 238     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 239
 240     return true;
 241 }
 242
 243 // change the state of the item and redraw it
 244 void wxCheckListBoxItem::Check(bool check)
 245 {
 246     m_bChecked = check;
 247
 248     // index may be changed because new items were added/deleted
 249     if ( m_pParent->GetItemIndex(this) != (int)m_nIndex )
 250     {
 251         // update it
 252         int index = m_pParent->GetItemIndex(this);
 253
 254         wxASSERT_MSG( index != wxNOT_FOUND, wxT("what does this item do here?") );
 255
 256         m_nIndex = (size_t)index;
 257     }
 258
 259     HWND hwndListbox = (HWND)m_pParent->GetHWND();
 260
 261     RECT rcUpdate;
 262
 263     if ( ::SendMessage(hwndListbox, LB_GETITEMRECT,
 264                        m_nIndex, (LPARAM)&rcUpdate) == LB_ERR )
 265     {
 266         wxLogDebug(wxT("LB_GETITEMRECT failed"));
 267     }
 268
 269     ::InvalidateRect(hwndListbox, &rcUpdate, FALSE);
 270 }
 271
 272 // send an "item checked" event
 273 void wxCheckListBoxItem::SendEvent()
 274 {
 275     wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
 276     event.SetInt(m_nIndex);
 277     event.SetEventObject(m_pParent);
 278     m_pParent->ProcessCommand(event);
 279 }
 280
 281 // ----------------------------------------------------------------------------
 282 // implementation of wxCheckListBox class
 283 // ----------------------------------------------------------------------------
 284
 285 // define event table
 286 // ------------------
 287 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
 288   EVT_KEY_DOWN(wxCheckListBox::OnKeyDown)
 289   EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
 290 END_EVENT_TABLE()
 291
 292 // control creation
 293 // ----------------
 294
 295 // def ctor: use Create() to really create the control
 296 wxCheckListBox::wxCheckListBox()
 297 {
 298 }
 299
 300 // ctor which creates the associated control
 301 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 302                                const wxPoint& pos, const wxSize& size,
 303                                int nStrings, const wxString choices[],
 304                                long style, const wxValidator& val,
 305                                const wxString& name)
 306 {
 307     Create(parent, id, pos, size, nStrings, choices, style, val, name);
 308 }
 309
 310 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 311                                const wxPoint& pos, const wxSize& size,
 312                                const wxArrayString& choices,
 313                                long style, const wxValidator& val,
 314                                const wxString& name)
 315 {
 316     Create(parent, id, pos, size, choices, style, val, name);
 317 }
 318
 319 bool wxCheckListBox::Create(wxWindow *parent, wxWindowID id,
 320                             const wxPoint& pos, const wxSize& size,
 321                             int n, const wxString choices[],
 322                             long style,
 323                             const wxValidator& validator, const wxString& name)
 324 {
 325     return wxListBox::Create(parent, id, pos, size, n, choices,
 326                              style | wxLB_OWNERDRAW, validator, name);
 327 }
 328
 329 bool wxCheckListBox::Create(wxWindow *parent, wxWindowID id,
 330                             const wxPoint& pos, const wxSize& size,
 331                             const wxArrayString& choices,
 332                             long style,
 333                             const wxValidator& validator, const wxString& name)
 334 {
 335     return wxListBox::Create(parent, id, pos, size, choices,
 336                              style | wxLB_OWNERDRAW, validator, name);
 337 }
 338
 339 // misc overloaded methods
 340 // -----------------------
 341
 342 void wxCheckListBox::Delete(int N)
 343 {
 344     wxCHECK_RET( N >= 0 && N < m_noItems,
 345                  wxT("invalid index in wxListBox::Delete") );
 346
 347     wxListBox::Delete(N);
 348
 349     // free memory
 350     delete m_aItems[N];
 351
 352     m_aItems.RemoveAt(N);
 353 }
 354
 355 bool wxCheckListBox::SetFont( const wxFont &font )
 356 {
 357     size_t i;
 358     for ( i = 0; i < m_aItems.GetCount(); i++ )
 359         m_aItems[i]->SetFont(font);
 360
 361     wxListBox::SetFont(font);
 362
 363     return true;
 364 }
 365
 366 // create/retrieve item
 367 // --------------------
 368
 369 // create a check list box item
 370 wxOwnerDrawn *wxCheckListBox::CreateLboxItem(size_t nIndex)
 371 {
 372   wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
 373   return pItem;
 374 }
 375
 376 // return item size
 377 // ----------------
 378 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 379 {
 380   if ( wxListBox::MSWOnMeasure(item) ) {
 381     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 382
 383     // save item height
 384     m_nItemHeight = pStruct->itemHeight;
 385
 386     // add place for the check mark
 387     pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();
 388
 389     return true;
 390   }
 391
 392   return false;
 393 }
 394
 395 // check items
 396 // -----------
 397
 398 bool wxCheckListBox::IsChecked(size_t uiIndex) const
 399 {
 400     wxCHECK_MSG( uiIndex < (size_t)GetCount(), false, _T("bad wxCheckListBox index") );
 401
 402     return GetItem(uiIndex)->IsChecked();
 403 }
 404
 405 void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
 406 {
 407     wxCHECK_RET( uiIndex < (size_t)GetCount(), _T("bad wxCheckListBox index") );
 408
 409     GetItem(uiIndex)->Check(bCheck);
 410 }
 411
 412 // process events
 413 // --------------
 414
 415 void wxCheckListBox::OnKeyDown(wxKeyEvent& event)
 416 {
 417     // what do we do?
 418     enum
 419     {
 420         None,
 421         Toggle,
 422         Set,
 423         Clear
 424     } oper;
 425
 426     switch ( event.GetKeyCode() )
 427     {
 428         case WXK_SPACE:
 429             oper = Toggle;
 430             break;
 431
 432         case WXK_NUMPAD_ADD:
 433         case '+':
 434             oper = Set;
 435             break;
 436
 437         case WXK_NUMPAD_SUBTRACT:
 438         case '-':
 439             oper = Clear;
 440             break;
 441
 442         default:
 443             oper = None;
 444     }
 445
 446     if ( oper != None )
 447     {
 448         wxArrayInt selections;
 449         int count = 0;
 450         if ( HasMultipleSelection() )
 451         {
 452             count = GetSelections(selections);
 453         }
 454         else
 455         {
 456             int sel = GetSelection();
 457             if (sel != -1)
 458             {
 459                 count = 1;
 460                 selections.Add(sel);
 461             }
 462         }
 463
 464         for ( int i = 0; i < count; i++ )
 465         {
 466             wxCheckListBoxItem *item = GetItem(selections[i]);
 467             if ( !item )
 468             {
 469                 wxFAIL_MSG( _T("no wxCheckListBoxItem?") );
 470                 continue;
 471             }
 472
 473             switch ( oper )
 474             {
 475                 case Toggle:
 476                     item->Toggle();
 477                     break;
 478
 479                 case Set:
 480                 case Clear:
 481                     item->Check( oper == Set );
 482                     break;
 483
 484                 default:
 485                     wxFAIL_MSG( _T("what should this key do?") );
 486             }
 487
 488             // we should send an event as this has been done by the user and
 489             // not by the program
 490             item->SendEvent();
 491         }
 492     }
 493     else // nothing to do
 494     {
 495         event.Skip();
 496     }
 497 }
 498
 499 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
 500 {
 501   // clicking on the item selects it, clicking on the checkmark toggles
 502   if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
 503     int nItem = HitTest(event.GetX(), event.GetY());
 504
 505     if ( nItem != wxNOT_FOUND ) {
 506       wxCheckListBoxItem *item = GetItem(nItem);
 507       item->Toggle();
 508       item->SendEvent();
 509     }
 510     //else: it's not an error, just click outside of client zone
 511   }
 512   else {
 513     // implement default behaviour: clicking on the item selects it
 514     event.Skip();
 515   }
 516 }
 517
 518 int wxCheckListBox::DoHitTestItem(wxCoord x, wxCoord y) const
 519 {
 520     int nItem = (int)::SendMessage
 521                              (
 522                               (HWND)GetHWND(),
 523                               LB_ITEMFROMPOINT,
 524                               0,
 525                               MAKELPARAM(x, y)
 526                              );
 527
 528   return nItem >= m_noItems ? wxNOT_FOUND : nItem;
 529 }
 530
 531
 532 wxSize wxCheckListBox::DoGetBestSize() const
 533 {
 534     wxSize best = wxListBox::DoGetBestSize();
 535     best.x += wxOwnerDrawn::GetDefaultMarginWidth();  // add room for the checkbox
 536     CacheBestSize(best);
 537     return best;
 538 }
 539
 540 #endif
 541