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_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 #if defined(__GNUWIN32_OLD__)
  56     #include "wx/msw/gnuwin32/extra.h"
  57 #endif
  58
  59 // ----------------------------------------------------------------------------
  60 // private functions
  61 // ----------------------------------------------------------------------------
  62
  63 // get item (converted to right type)
  64 #define GetItem(n)    ((wxCheckListBoxItem *)(GetItem(n)))
  65
  66 // ============================================================================
  67 // implementation
  68 // ============================================================================
  69
  70 // TODO: wxCONSTRUCTOR
  71 #if 0 // wxUSE_EXTENDED_RTTI
  72 WX_DEFINE_FLAGS( wxCheckListBoxStyle )
  73
  74 wxBEGIN_FLAGS( wxCheckListBoxStyle )
  75     // new style border flags, we put them first to
  76     // use them for streaming out
  77     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  78     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  79     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  80     wxFLAGS_MEMBER(wxBORDER_RAISED)
  81     wxFLAGS_MEMBER(wxBORDER_STATIC)
  82     wxFLAGS_MEMBER(wxBORDER_NONE)
  83
  84     // old style border flags
  85     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  86     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  87     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  88     wxFLAGS_MEMBER(wxRAISED_BORDER)
  89     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  90     wxFLAGS_MEMBER(wxBORDER)
  91
  92     // standard window styles
  93     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  94     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  95     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  96     wxFLAGS_MEMBER(wxWANTS_CHARS)
  97     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  98     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  99     wxFLAGS_MEMBER(wxVSCROLL)
 100     wxFLAGS_MEMBER(wxHSCROLL)
 101
 102     wxFLAGS_MEMBER(wxLB_SINGLE)
 103     wxFLAGS_MEMBER(wxLB_MULTIPLE)
 104     wxFLAGS_MEMBER(wxLB_EXTENDED)
 105     wxFLAGS_MEMBER(wxLB_HSCROLL)
 106     wxFLAGS_MEMBER(wxLB_ALWAYS_SB)
 107     wxFLAGS_MEMBER(wxLB_NEEDED_SB)
 108     wxFLAGS_MEMBER(wxLB_SORT)
 109
 110 wxEND_FLAGS( wxCheckListBoxStyle )
 111
 112 IMPLEMENT_DYNAMIC_CLASS_XTI(wxCheckListBox, wxListBox,"wx/checklst.h")
 113
 114 wxBEGIN_PROPERTIES_TABLE(wxCheckListBox)
 115         wxEVENT_PROPERTY( Toggle , wxEVT_COMMAND_CHECKLISTBOX_TOGGLED , wxCommandEvent )
 116
 117     wxPROPERTY_FLAGS( WindowStyle , wxCheckListBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 118 wxEND_PROPERTIES_TABLE()
 119
 120 #else
 121 IMPLEMENT_DYNAMIC_CLASS(wxCheckListBox, wxListBox)
 122 #endif
 123
 124 /*
 125 TODO PROPERTIES
 126         list content
 127                 item , checked (no)
 128 */
 129 // ----------------------------------------------------------------------------
 130 // declaration and implementation of wxCheckListBoxItem class
 131 // ----------------------------------------------------------------------------
 132
 133 class wxCheckListBoxItem : public wxOwnerDrawn
 134 {
 135 friend class WXDLLEXPORT wxCheckListBox;
 136 public:
 137   // ctor
 138   wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex);
 139
 140   // drawing functions
 141   virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
 142
 143   // simple accessors and operations
 144   bool IsChecked() const { return m_bChecked; }
 145
 146   void Check(bool bCheck);
 147   void Toggle() { Check(!IsChecked()); }
 148
 149   void SendEvent();
 150
 151 private:
 152
 153     DECLARE_NO_COPY_CLASS(wxCheckListBoxItem)
 154   bool            m_bChecked;
 155   wxCheckListBox *m_pParent;
 156   size_t          m_nIndex;
 157 };
 158
 159 wxCheckListBoxItem::wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex)
 160                   : wxOwnerDrawn(wxEmptyString, TRUE)   // checkable
 161 {
 162   m_bChecked = FALSE;
 163   m_pParent  = pParent;
 164   m_nIndex   = nIndex;
 165
 166   // we don't initialize m_nCheckHeight/Width vars because it's
 167   // done in OnMeasure while they are used only in OnDraw and we
 168   // know that there will always be OnMeasure before OnDraw
 169
 170   // fix appearance
 171   SetMarginWidth(GetDefaultMarginWidth());
 172 }
 173
 174 /*
 175  * JACS - I've got the owner-draw stuff partially working with WIN16,
 176  * with a really horrible-looking cross for wxCheckListBox instead of a
 177  * check - could use a bitmap check-mark instead, defined in wx.rc.
 178  * Also there's a refresh problem whereby it doesn't always draw the
 179  * check until you click to the right of it, which is OK for WIN32.
 180  */
 181
 182 bool wxCheckListBoxItem::OnDrawItem(wxDC& dc, const wxRect& rc,
 183                                     wxODAction act, wxODStatus stat)
 184 {
 185   if ( IsChecked() )
 186     stat = (wxOwnerDrawn::wxODStatus)(stat | wxOwnerDrawn::wxODChecked);
 187
 188   if ( wxOwnerDrawn::OnDrawItem(dc, rc, act, stat) ) {
 189     // ## using native API for performance and precision
 190     size_t nCheckWidth  = GetDefaultMarginWidth(),
 191          nCheckHeight = m_pParent->GetItemHeight();
 192
 193     int x = rc.GetX(),
 194         y = rc.GetY();
 195
 196     HDC hdc = (HDC)dc.GetHDC();
 197
 198     // create pens
 199     HPEN hpenBack = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_WINDOW)),
 200          hpenGray = CreatePen(PS_SOLID, 0, RGB(128, 128, 128)),
 201          hpenPrev = (HPEN)SelectObject(hdc, hpenBack);
 202
 203     // we erase the 1-pixel border
 204     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 205
 206     // shift check mark 1 pixel to the right (it looks better like this)
 207     x++;
 208
 209     if ( IsChecked() ) {
 210       // first create a monochrome bitmap in a memory DC
 211       HDC hdcMem = CreateCompatibleDC(hdc);
 212       HBITMAP hbmpCheck = CreateBitmap(nCheckWidth, nCheckHeight, 1, 1, 0);
 213       HBITMAP hbmpOld = (HBITMAP)SelectObject(hdcMem, hbmpCheck);
 214
 215       // then draw a check mark into it
 216
 217       RECT rect;
 218       rect.left   = 0;
 219       rect.top    = 0;
 220       rect.right  = nCheckWidth;
 221       rect.bottom = nCheckHeight;
 222
 223 #ifdef __WXWINCE__
 224       DrawFrameControl(hdcMem, &rect, DFC_BUTTON, DFCS_BUTTONCHECK);
 225 #else
 226       DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
 227 #endif
 228
 229       // finally copy it to screen DC and clean up
 230       BitBlt(hdc, x, y, nCheckWidth - 1, nCheckHeight,
 231              hdcMem, 0, 0, SRCCOPY);
 232
 233       SelectObject(hdcMem, hbmpOld);
 234       DeleteObject(hbmpCheck);
 235       DeleteDC(hdcMem);
 236     }
 237
 238     // now we draw the smaller rectangle
 239     y++;
 240     nCheckWidth  -= 2;
 241     nCheckHeight -= 2;
 242
 243     // draw hollow gray rectangle
 244     (void)SelectObject(hdc, hpenGray);
 245     HBRUSH hbrPrev  = (HBRUSH)SelectObject(hdc, GetStockObject(NULL_BRUSH));
 246     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 247
 248     // clean up
 249     (void)SelectObject(hdc, hpenPrev);
 250     (void)SelectObject(hdc, hbrPrev);
 251
 252     DeleteObject(hpenBack);
 253     DeleteObject(hpenGray);
 254
 255     /*
 256     dc.DrawRectangle(x, y, nCheckWidth, nCheckHeight);
 257
 258     if ( IsChecked() ) {
 259       dc.DrawLine(x, y, x + nCheckWidth, y + nCheckHeight);
 260       dc.DrawLine(x, y + nCheckHeight, x + nCheckWidth, y);
 261     }
 262     */
 263
 264     return TRUE;
 265   }
 266
 267   return FALSE;
 268 }
 269
 270 // change the state of the item and redraw it
 271 void wxCheckListBoxItem::Check(bool check)
 272 {
 273     m_bChecked = check;
 274
 275     // index may be changed because new items were added/deleted
 276     if ( m_pParent->GetItemIndex(this) != (int)m_nIndex )
 277     {
 278         // update it
 279         int index = m_pParent->GetItemIndex(this);
 280
 281         wxASSERT_MSG( index != wxNOT_FOUND, wxT("what does this item do here?") );
 282
 283         m_nIndex = (size_t)index;
 284     }
 285
 286     HWND hwndListbox = (HWND)m_pParent->GetHWND();
 287
 288     #ifdef __WIN32__
 289         RECT rcUpdate;
 290
 291         if ( ::SendMessage(hwndListbox, LB_GETITEMRECT,
 292                            m_nIndex, (LPARAM)&rcUpdate) == LB_ERR )
 293         {
 294             wxLogDebug(wxT("LB_GETITEMRECT failed"));
 295         }
 296     #else // Win16
 297         // FIXME this doesn't work if the listbox is scrolled!
 298         size_t nHeight = m_pParent->GetItemHeight();
 299         size_t y = m_nIndex * nHeight;
 300         RECT rcUpdate ;
 301         rcUpdate.left   = 0 ;
 302         rcUpdate.top    = y ;
 303         rcUpdate.right  = GetDefaultMarginWidth() ;
 304         rcUpdate.bottom = y + nHeight ;
 305     #endif  // Win32/16
 306
 307     InvalidateRect(hwndListbox, &rcUpdate, FALSE);
 308 }
 309
 310 // send an "item checked" event
 311 void wxCheckListBoxItem::SendEvent()
 312 {
 313     wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
 314     event.SetInt(m_nIndex);
 315     event.SetEventObject(m_pParent);
 316     m_pParent->ProcessCommand(event);
 317 }
 318
 319 // ----------------------------------------------------------------------------
 320 // implementation of wxCheckListBox class
 321 // ----------------------------------------------------------------------------
 322
 323 // define event table
 324 // ------------------
 325 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
 326   EVT_KEY_DOWN(wxCheckListBox::OnKeyDown)
 327   EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
 328 END_EVENT_TABLE()
 329
 330 // control creation
 331 // ----------------
 332
 333 // def ctor: use Create() to really create the control
 334 wxCheckListBox::wxCheckListBox()
 335 {
 336 }
 337
 338 // ctor which creates the associated control
 339 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 340                                const wxPoint& pos, const wxSize& size,
 341                                int nStrings, const wxString choices[],
 342                                long style, const wxValidator& val,
 343                                const wxString& name)
 344 {
 345     Create(parent, id, pos, size, nStrings, choices, style, val, name);
 346 }
 347
 348 bool wxCheckListBox::Create(wxWindow *parent, wxWindowID id,
 349                             const wxPoint& pos, const wxSize& size,
 350                             int n, const wxString choices[],
 351                             long style,
 352                             const wxValidator& validator, const wxString& name)
 353 {
 354     return wxListBox::Create(parent, id, pos, size, n, choices,
 355                              style | wxLB_OWNERDRAW, validator, name);
 356 }
 357
 358 // misc overloaded methods
 359 // -----------------------
 360
 361 void wxCheckListBox::Delete(int N)
 362 {
 363     wxCHECK_RET( N >= 0 && N < m_noItems,
 364                  wxT("invalid index in wxListBox::Delete") );
 365
 366     wxListBox::Delete(N);
 367
 368     // free memory
 369     delete m_aItems[N];
 370
 371     m_aItems.RemoveAt(N);
 372 }
 373
 374 bool wxCheckListBox::SetFont( const wxFont &font )
 375 {
 376     size_t i;
 377     for ( i = 0; i < m_aItems.GetCount(); i++ )
 378         m_aItems[i]->SetFont(font);
 379
 380     wxListBox::SetFont(font);
 381
 382     return TRUE;
 383 }
 384
 385 // create/retrieve item
 386 // --------------------
 387
 388 // create a check list box item
 389 wxOwnerDrawn *wxCheckListBox::CreateLboxItem(size_t nIndex)
 390 {
 391   wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
 392   return pItem;
 393 }
 394
 395 // return item size
 396 // ----------------
 397 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 398 {
 399   if ( wxListBox::MSWOnMeasure(item) ) {
 400     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 401
 402     // save item height
 403     m_nItemHeight = pStruct->itemHeight;
 404
 405     // add place for the check mark
 406     pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();
 407
 408     return TRUE;
 409   }
 410
 411   return FALSE;
 412 }
 413
 414 // check items
 415 // -----------
 416
 417 bool wxCheckListBox::IsChecked(size_t uiIndex) const
 418 {
 419     wxCHECK_MSG( uiIndex < (size_t)GetCount(), FALSE, _T("bad wxCheckListBox index") );
 420
 421     return GetItem(uiIndex)->IsChecked();
 422 }
 423
 424 void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
 425 {
 426     wxCHECK_RET( uiIndex < (size_t)GetCount(), _T("bad wxCheckListBox index") );
 427
 428     GetItem(uiIndex)->Check(bCheck);
 429 }
 430
 431 // process events
 432 // --------------
 433
 434 void wxCheckListBox::OnKeyDown(wxKeyEvent& event)
 435 {
 436     // what do we do?
 437     enum
 438     {
 439         None,
 440         Toggle,
 441         Set,
 442         Clear
 443     } oper;
 444
 445     switch ( event.GetKeyCode() )
 446     {
 447         case WXK_SPACE:
 448             oper = Toggle;
 449             break;
 450
 451         case WXK_NUMPAD_ADD:
 452         case '+':
 453             oper = Set;
 454             break;
 455
 456         case WXK_NUMPAD_SUBTRACT:
 457         case '-':
 458             oper = Clear;
 459             break;
 460
 461         default:
 462             oper = None;
 463     }
 464
 465     if ( oper != None )
 466     {
 467         wxArrayInt selections;
 468         int count = 0;
 469         if ( HasMultipleSelection() )
 470         {
 471             count = GetSelections(selections);
 472         }
 473         else
 474         {
 475             int sel = GetSelection();
 476             if (sel != -1)
 477             {
 478                 count = 1;
 479                 selections.Add(sel);
 480             }
 481         }
 482
 483         for ( int i = 0; i < count; i++ )
 484         {
 485             wxCheckListBoxItem *item = GetItem(selections[i]);
 486             if ( !item )
 487             {
 488                 wxFAIL_MSG( _T("no wxCheckListBoxItem?") );
 489                 continue;
 490             }
 491
 492             switch ( oper )
 493             {
 494                 case Toggle:
 495                     item->Toggle();
 496                     break;
 497
 498                 case Set:
 499                 case Clear:
 500                     item->Check( oper == Set );
 501                     break;
 502
 503                 default:
 504                     wxFAIL_MSG( _T("what should this key do?") );
 505             }
 506
 507             // we should send an event as this has been done by the user and
 508             // not by the program
 509             item->SendEvent();
 510         }
 511     }
 512     else // nothing to do
 513     {
 514         event.Skip();
 515     }
 516 }
 517
 518 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
 519 {
 520   // clicking on the item selects it, clicking on the checkmark toggles
 521   if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
 522     int nItem = HitTest(event.GetX(), event.GetY());
 523
 524     if ( nItem != wxNOT_FOUND ) {
 525       wxCheckListBoxItem *item = GetItem(nItem);
 526       item->Toggle();
 527       item->SendEvent();
 528     }
 529     //else: it's not an error, just click outside of client zone
 530   }
 531   else {
 532     // implement default behaviour: clicking on the item selects it
 533     event.Skip();
 534   }
 535 }
 536
 537 int wxCheckListBox::DoHitTestItem(wxCoord x, wxCoord y) const
 538 {
 539   #ifdef __WIN32__
 540     int nItem = (int)::SendMessage
 541                              (
 542                               (HWND)GetHWND(),
 543                               LB_ITEMFROMPOINT,
 544                               0,
 545                               MAKELPARAM(x, y)
 546                              );
 547   #else // Win16
 548     // FIXME this doesn't work when the listbox is scrolled!
 549     int nItem = y / m_nItemHeight;
 550   #endif // Win32/16
 551
 552   return nItem >= m_noItems ? wxNOT_FOUND : nItem;
 553 }
 554
 555 #endif
 556