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 license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  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 <windows.h>
  51 #include <windowsx.h>
  52
  53 #if defined(__GNUWIN32_OLD__)
  54     #include "wx/msw/gnuwin32/extra.h"
  55 #endif
  56
  57 // ----------------------------------------------------------------------------
  58 // private functions
  59 // ----------------------------------------------------------------------------
  60
  61 // get item (converted to right type)
  62 #define GetItem(n)    ((wxCheckListBoxItem *)(GetItem(n)))
  63
  64 // ============================================================================
  65 // implementation
  66 // ============================================================================
  67
  68 IMPLEMENT_DYNAMIC_CLASS(wxCheckListBox, wxListBox)
  69
  70 // ----------------------------------------------------------------------------
  71 // declaration and implementation of wxCheckListBoxItem class
  72 // ----------------------------------------------------------------------------
  73
  74 class wxCheckListBoxItem : public wxOwnerDrawn
  75 {
  76 friend class WXDLLEXPORT wxCheckListBox;
  77 public:
  78   // ctor
  79   wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex);
  80
  81   // drawing functions
  82   virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
  83
  84   // simple accessors and operations
  85   bool IsChecked() const { return m_bChecked; }
  86
  87   void Check(bool bCheck);
  88   void Toggle() { Check(!IsChecked()); }
  89
  90   void SendEvent();
  91
  92 private:
  93
  94     DECLARE_NO_COPY_CLASS(wxCheckListBoxItem)
  95   bool            m_bChecked;
  96   wxCheckListBox *m_pParent;
  97   size_t          m_nIndex;
  98 };
  99
 100 wxCheckListBoxItem::wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex)
 101                   : wxOwnerDrawn(wxEmptyString, TRUE)   // checkable
 102 {
 103   m_bChecked = FALSE;
 104   m_pParent  = pParent;
 105   m_nIndex   = nIndex;
 106
 107   // we don't initialize m_nCheckHeight/Width vars because it's
 108   // done in OnMeasure while they are used only in OnDraw and we
 109   // know that there will always be OnMeasure before OnDraw
 110
 111   // fix appearance
 112   SetMarginWidth(GetDefaultMarginWidth());
 113 }
 114
 115 /*
 116  * JACS - I've got the owner-draw stuff partially working with WIN16,
 117  * with a really horrible-looking cross for wxCheckListBox instead of a
 118  * check - could use a bitmap check-mark instead, defined in wx.rc.
 119  * Also there's a refresh problem whereby it doesn't always draw the
 120  * check until you click to the right of it, which is OK for WIN32.
 121  */
 122
 123 bool wxCheckListBoxItem::OnDrawItem(wxDC& dc, const wxRect& rc,
 124                                     wxODAction act, wxODStatus stat)
 125 {
 126   if ( IsChecked() )
 127     stat = (wxOwnerDrawn::wxODStatus)(stat | wxOwnerDrawn::wxODChecked);
 128
 129   if ( wxOwnerDrawn::OnDrawItem(dc, rc, act, stat) ) {
 130     // ## using native API for performance and precision
 131     size_t nCheckWidth  = GetDefaultMarginWidth(),
 132          nCheckHeight = m_pParent->GetItemHeight();
 133
 134     int x = rc.GetX(),
 135         y = rc.GetY();
 136
 137     HDC hdc = (HDC)dc.GetHDC();
 138
 139     // create pens
 140     HPEN hpenBack = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_WINDOW)),
 141          hpenGray = CreatePen(PS_SOLID, 0, RGB(128, 128, 128)),
 142          hpenPrev = (HPEN)SelectObject(hdc, hpenBack);
 143
 144     // we erase the 1-pixel border
 145     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 146
 147     // shift check mark 1 pixel to the right (it looks better like this)
 148     x++;
 149
 150     if ( IsChecked() ) {
 151       // first create a monochrome bitmap in a memory DC
 152       HDC hdcMem = CreateCompatibleDC(hdc);
 153       HBITMAP hbmpCheck = CreateBitmap(nCheckWidth, nCheckHeight, 1, 1, 0);
 154       HBITMAP hbmpOld = (HBITMAP)SelectObject(hdcMem, hbmpCheck);
 155
 156       // then draw a check mark into it
 157 #if defined(__WIN32__) && !defined(__SC__)
 158       RECT rect;
 159       rect.left   = 0;
 160       rect.top    = 0;
 161       rect.right  = nCheckWidth;
 162       rect.bottom = nCheckHeight;
 163
 164       DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
 165 #else
 166       // In WIN16, draw a cross
 167       HPEN blackPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
 168       HPEN whiteBrush = (HPEN)GetStockObject(WHITE_BRUSH);
 169       HPEN hPenOld = (HPEN)::SelectObject(hdcMem, blackPen);
 170       HPEN hBrushOld = (HPEN)::SelectObject(hdcMem, whiteBrush);
 171       ::SetROP2(hdcMem, R2_COPYPEN);
 172       Rectangle(hdcMem, 0, 0, nCheckWidth, nCheckHeight);
 173       MoveTo(hdcMem, 0, 0);
 174       LineTo(hdcMem, nCheckWidth, nCheckHeight);
 175       MoveTo(hdcMem, nCheckWidth, 0);
 176       LineTo(hdcMem, 0, nCheckHeight);
 177       ::SelectObject(hdcMem, hPenOld);
 178       ::SelectObject(hdcMem, hBrushOld);
 179       ::DeleteObject(blackPen);
 180 #endif
 181
 182       // finally copy it to screen DC and clean up
 183       BitBlt(hdc, x, y, nCheckWidth - 1, nCheckHeight,
 184              hdcMem, 0, 0, SRCCOPY);
 185
 186       SelectObject(hdcMem, hbmpOld);
 187       DeleteObject(hbmpCheck);
 188       DeleteDC(hdcMem);
 189     }
 190
 191     // now we draw the smaller rectangle
 192     y++;
 193     nCheckWidth  -= 2;
 194     nCheckHeight -= 2;
 195
 196     // draw hollow gray rectangle
 197     (void)SelectObject(hdc, hpenGray);
 198     HBRUSH hbrPrev  = (HBRUSH)SelectObject(hdc, GetStockObject(NULL_BRUSH));
 199     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 200
 201     // clean up
 202     (void)SelectObject(hdc, hpenPrev);
 203     (void)SelectObject(hdc, hbrPrev);
 204
 205     DeleteObject(hpenBack);
 206     DeleteObject(hpenGray);
 207
 208     /*
 209     dc.DrawRectangle(x, y, nCheckWidth, nCheckHeight);
 210
 211     if ( IsChecked() ) {
 212       dc.DrawLine(x, y, x + nCheckWidth, y + nCheckHeight);
 213       dc.DrawLine(x, y + nCheckHeight, x + nCheckWidth, y);
 214     }
 215     */
 216
 217     return TRUE;
 218   }
 219
 220   return FALSE;
 221 }
 222
 223 // change the state of the item and redraw it
 224 void wxCheckListBoxItem::Check(bool check)
 225 {
 226     m_bChecked = check;
 227
 228     // index may be changed because new items were added/deleted
 229     if ( m_pParent->GetItemIndex(this) != (int)m_nIndex )
 230     {
 231         // update it
 232         int index = m_pParent->GetItemIndex(this);
 233
 234         wxASSERT_MSG( index != wxNOT_FOUND, wxT("what does this item do here?") );
 235
 236         m_nIndex = (size_t)index;
 237     }
 238
 239     HWND hwndListbox = (HWND)m_pParent->GetHWND();
 240
 241     #ifdef __WIN32__
 242         RECT rcUpdate;
 243
 244         if ( ::SendMessage(hwndListbox, LB_GETITEMRECT,
 245                            m_nIndex, (LPARAM)&rcUpdate) == LB_ERR )
 246         {
 247             wxLogDebug(wxT("LB_GETITEMRECT failed"));
 248         }
 249     #else // Win16
 250         // FIXME this doesn't work if the listbox is scrolled!
 251         size_t nHeight = m_pParent->GetItemHeight();
 252         size_t y = m_nIndex * nHeight;
 253         RECT rcUpdate ;
 254         rcUpdate.left   = 0 ;
 255         rcUpdate.top    = y ;
 256         rcUpdate.right  = GetDefaultMarginWidth() ;
 257         rcUpdate.bottom = y + nHeight ;
 258     #endif  // Win32/16
 259
 260     InvalidateRect(hwndListbox, &rcUpdate, FALSE);
 261 }
 262
 263 // send an "item checked" event
 264 void wxCheckListBoxItem::SendEvent()
 265 {
 266     wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
 267     event.SetInt(m_nIndex);
 268     event.SetEventObject(m_pParent);
 269     m_pParent->ProcessCommand(event);
 270 }
 271
 272 // ----------------------------------------------------------------------------
 273 // implementation of wxCheckListBox class
 274 // ----------------------------------------------------------------------------
 275
 276 // define event table
 277 // ------------------
 278 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
 279   EVT_KEY_DOWN(wxCheckListBox::OnKeyDown)
 280   EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
 281 END_EVENT_TABLE()
 282
 283 // control creation
 284 // ----------------
 285
 286 // def ctor: use Create() to really create the control
 287 wxCheckListBox::wxCheckListBox()
 288 {
 289 }
 290
 291 // ctor which creates the associated control
 292 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 293                                const wxPoint& pos, const wxSize& size,
 294                                int nStrings, const wxString choices[],
 295                                long style, const wxValidator& val,
 296                                const wxString& name)
 297 {
 298     Create(parent, id, pos, size, nStrings, choices, style, val, name);
 299 }
 300
 301 bool wxCheckListBox::Create(wxWindow *parent, wxWindowID id,
 302                             const wxPoint& pos, const wxSize& size,
 303                             int n, const wxString choices[],
 304                             long style,
 305                             const wxValidator& validator, const wxString& name)
 306 {
 307     return wxListBox::Create(parent, id, pos, size, n, choices,
 308                              style | wxLB_OWNERDRAW, validator, name);
 309 }
 310
 311 // misc overloaded methods
 312 // -----------------------
 313
 314 void wxCheckListBox::Delete(int N)
 315 {
 316     wxCHECK_RET( N >= 0 && N < m_noItems,
 317                  wxT("invalid index in wxListBox::Delete") );
 318
 319     wxListBox::Delete(N);
 320
 321     // free memory
 322     delete m_aItems[N];
 323
 324     m_aItems.RemoveAt(N);
 325 }
 326
 327 bool wxCheckListBox::SetFont( const wxFont &font )
 328 {
 329     size_t i;
 330     for ( i = 0; i < m_aItems.GetCount(); i++ )
 331         m_aItems[i]->SetFont(font);
 332
 333     wxListBox::SetFont(font);
 334
 335     return TRUE;
 336 }
 337
 338 // create/retrieve item
 339 // --------------------
 340
 341 // create a check list box item
 342 wxOwnerDrawn *wxCheckListBox::CreateLboxItem(size_t nIndex)
 343 {
 344   wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
 345   return pItem;
 346 }
 347
 348 // return item size
 349 // ----------------
 350 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 351 {
 352   if ( wxListBox::MSWOnMeasure(item) ) {
 353     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 354
 355     // save item height
 356     m_nItemHeight = pStruct->itemHeight;
 357
 358     // add place for the check mark
 359     pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();
 360
 361     return TRUE;
 362   }
 363
 364   return FALSE;
 365 }
 366
 367 // check items
 368 // -----------
 369
 370 bool wxCheckListBox::IsChecked(size_t uiIndex) const
 371 {
 372     wxCHECK_MSG( uiIndex < (size_t)GetCount(), FALSE, _T("bad wxCheckListBox index") );
 373
 374     return GetItem(uiIndex)->IsChecked();
 375 }
 376
 377 void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
 378 {
 379     wxCHECK_RET( uiIndex < (size_t)GetCount(), _T("bad wxCheckListBox index") );
 380
 381     GetItem(uiIndex)->Check(bCheck);
 382 }
 383
 384 // process events
 385 // --------------
 386
 387 void wxCheckListBox::OnKeyDown(wxKeyEvent& event)
 388 {
 389     // what do we do?
 390     enum
 391     {
 392         None,
 393         Toggle,
 394         Set,
 395         Clear
 396     } oper;
 397
 398     switch ( event.GetKeyCode() )
 399     {
 400         case WXK_SPACE:
 401             oper = Toggle;
 402             break;
 403
 404         case WXK_NUMPAD_ADD:
 405         case '+':
 406             oper = Set;
 407             break;
 408
 409         case WXK_NUMPAD_SUBTRACT:
 410         case '-':
 411             oper = Clear;
 412             break;
 413
 414         default:
 415             oper = None;
 416     }
 417
 418     if ( oper != None )
 419     {
 420         wxArrayInt selections;
 421         int count = 0;
 422         if ( HasMultipleSelection() )
 423         {
 424             count = GetSelections(selections);
 425         }
 426         else
 427         {
 428             int sel = GetSelection();
 429             if (sel != -1)
 430             {
 431                 count = 1;
 432                 selections.Add(sel);
 433             }
 434         }
 435
 436         for ( int i = 0; i < count; i++ )
 437         {
 438             wxCheckListBoxItem *item = GetItem(selections[i]);
 439             if ( !item )
 440             {
 441                 wxFAIL_MSG( _T("no wxCheckListBoxItem?") );
 442                 continue;
 443             }
 444
 445             switch ( oper )
 446             {
 447                 case Toggle:
 448                     item->Toggle();
 449                     break;
 450
 451                 case Set:
 452                 case Clear:
 453                     item->Check( oper == Set );
 454                     break;
 455
 456                 default:
 457                     wxFAIL_MSG( _T("what should this key do?") );
 458             }
 459
 460             // we should send an event as this has been done by the user and
 461             // not by the program
 462             item->SendEvent();
 463         }
 464     }
 465     else // nothing to do
 466     {
 467         event.Skip();
 468     }
 469 }
 470
 471 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
 472 {
 473   // clicking on the item selects it, clicking on the checkmark toggles
 474   if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
 475     int nItem = HitTest(event.GetX(), event.GetY());
 476
 477     if ( nItem != wxNOT_FOUND ) {
 478       wxCheckListBoxItem *item = GetItem(nItem);
 479       item->Toggle();
 480       item->SendEvent();
 481     }
 482     //else: it's not an error, just click outside of client zone
 483   }
 484   else {
 485     // implement default behaviour: clicking on the item selects it
 486     event.Skip();
 487   }
 488 }
 489
 490 int wxCheckListBox::DoHitTestItem(wxCoord x, wxCoord y) const
 491 {
 492   #ifdef __WIN32__
 493     int nItem = (int)::SendMessage
 494                              (
 495                               (HWND)GetHWND(),
 496                               LB_ITEMFROMPOINT,
 497                               0,
 498                               MAKELPARAM(x, y)
 499                              );
 500   #else // Win16
 501     // FIXME this doesn't work when the listbox is scrolled!
 502     int nItem = y / m_nItemHeight;
 503   #endif // Win32/16
 504
 505   return nItem >= m_noItems ? wxNOT_FOUND : nItem;
 506 }
 507
 508 #endif
 509