src/msw/calctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/calctrl.cpp
   3 // Purpose:     wxCalendarCtrl implementation
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-04-04
   6 // RCS-ID:      $Id$
   7 // Copyright:   (C) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/wxprec.h"
  20
  21 #ifdef __BORLANDC__
  22     #pragma hdrstop
  23 #endif
  24
  25 #if wxUSE_CALENDARCTRL
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/msw/wrapwin.h"
  29     #include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
  30     #include "wx/msw/private.h"
  31 #endif
  32
  33 #include "wx/calctrl.h"
  34
  35 #include "wx/msw/private/datecontrols.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // constants
  39 // ----------------------------------------------------------------------------
  40
  41 namespace
  42 {
  43
  44 // values of week days used by the native control
  45 enum
  46 {
  47     MonthCal_Monday,
  48     MonthCal_Tuesday,
  49     MonthCal_Wednesday,
  50     MonthCal_Thursday,
  51     MonthCal_Friday,
  52     MonthCal_Saturday,
  53     MonthCal_Sunday
  54 };
  55
  56 } // anonymous namespace
  57
  58 // ============================================================================
  59 // implementation
  60 // ============================================================================
  61
  62 // ----------------------------------------------------------------------------
  63 // wxCalendarCtrl creation
  64 // ----------------------------------------------------------------------------
  65
  66 void wxCalendarCtrl::Init()
  67 {
  68     m_marks =
  69     m_holidays = 0;
  70 }
  71
  72 bool
  73 wxCalendarCtrl::Create(wxWindow *parent,
  74                        wxWindowID id,
  75                        const wxDateTime& dt,
  76                        const wxPoint& pos,
  77                        const wxSize& size,
  78                        long style,
  79                        const wxString& name)
  80 {
  81     if ( !wxMSWDateControls::CheckInitialization() )
  82         return false;
  83
  84     // we need the arrows for the navigation
  85     style |= wxWANTS_CHARS;
  86
  87     // initialize the base class
  88     if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
  89         return false;
  90
  91     // create the native control: this is a bit tricky as we want to receive
  92     // double click events but the MONTHCAL_CLASS doesn't use CS_DBLCLKS style
  93     // and so we create our own copy of it which does
  94     static ClassRegistrar s_clsMonthCal;
  95     if ( !s_clsMonthCal.IsInitialized() )
  96     {
  97         // get a copy of standard class and modify it
  98         WNDCLASS wc;
  99         if ( ::GetClassInfo(NULL, MONTHCAL_CLASS, &wc) )
 100         {
 101             wc.lpszClassName = wxT("_wx_SysMonthCtl32");
 102             wc.style |= CS_DBLCLKS;
 103             s_clsMonthCal.Register(wc);
 104         }
 105         else
 106         {
 107             wxLogLastError(wxT("GetClassInfoEx(SysMonthCal32)"));
 108         }
 109     }
 110
 111     const wxChar * const clsname = s_clsMonthCal.IsRegistered()
 112         ? s_clsMonthCal.GetName().t_str()
 113         : MONTHCAL_CLASS;
 114
 115     if ( !MSWCreateControl(clsname, wxEmptyString, pos, size) )
 116         return false;
 117
 118     // initialize the control
 119     UpdateFirstDayOfWeek();
 120
 121     SetDate(dt.IsValid() ? dt : wxDateTime::Today());
 122
 123     SetHolidayAttrs();
 124     UpdateMarks();
 125
 126     Connect(wxEVT_LEFT_DOWN,
 127             wxMouseEventHandler(wxCalendarCtrl::MSWOnClick));
 128     Connect(wxEVT_LEFT_DCLICK,
 129             wxMouseEventHandler(wxCalendarCtrl::MSWOnDoubleClick));
 130
 131     return true;
 132 }
 133
 134 WXDWORD wxCalendarCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 135 {
 136     WXDWORD styleMSW = wxCalendarCtrlBase::MSWGetStyle(style, exstyle);
 137
 138     // right now we don't support all native styles but we should add wx styles
 139     // corresponding to MCS_NOTODAY and MCS_NOTODAYCIRCLE probably (TODO)
 140
 141     // for compatibility with the other versions, just turn off today display
 142     // unconditionally for now
 143     styleMSW |= MCS_NOTODAY;
 144
 145     // we also need this style for Mark() to work
 146     styleMSW |= MCS_DAYSTATE;
 147
 148     if ( style & wxCAL_SHOW_WEEK_NUMBERS )
 149        styleMSW |= MCS_WEEKNUMBERS;
 150
 151     return styleMSW;
 152 }
 153
 154 void wxCalendarCtrl::SetWindowStyleFlag(long style)
 155 {
 156     const bool hadMondayFirst = HasFlag(wxCAL_MONDAY_FIRST);
 157
 158     wxCalendarCtrlBase::SetWindowStyleFlag(style);
 159
 160     if ( HasFlag(wxCAL_MONDAY_FIRST) != hadMondayFirst )
 161         UpdateFirstDayOfWeek();
 162 }
 163
 164 // ----------------------------------------------------------------------------
 165 // wxCalendarCtrl geometry
 166 // ----------------------------------------------------------------------------
 167
 168 // TODO: handle WM_WININICHANGE
 169 wxSize wxCalendarCtrl::DoGetBestSize() const
 170 {
 171     RECT rc;
 172     if ( !GetHwnd() || !MonthCal_GetMinReqRect(GetHwnd(), &rc) )
 173     {
 174         return wxCalendarCtrlBase::DoGetBestSize();
 175     }
 176
 177     const wxSize best = wxRectFromRECT(rc).GetSize() + GetWindowBorderSize();
 178     CacheBestSize(best);
 179     return best;
 180 }
 181
 182 wxCalendarHitTestResult
 183 wxCalendarCtrl::HitTest(const wxPoint& pos,
 184                         wxDateTime *date,
 185                         wxDateTime::WeekDay *wd)
 186 {
 187     WinStruct<MCHITTESTINFO> hti;
 188
 189     // Vista and later SDKs add a few extra fields to MCHITTESTINFO which are
 190     // not supported by the previous versions, as we don't use them anyhow we
 191     // should pretend that we always use the old struct format to make the call
 192     // below work on pre-Vista systems (see #11057)
 193 #ifdef MCHITTESTINFO_V1_SIZE
 194     hti.cbSize = MCHITTESTINFO_V1_SIZE;
 195 #endif
 196
 197     hti.pt.x = pos.x;
 198     hti.pt.y = pos.y;
 199     switch ( MonthCal_HitTest(GetHwnd(), &hti) )
 200     {
 201         default:
 202         case MCHT_CALENDARWEEKNUM:
 203             wxFAIL_MSG( "unexpected" );
 204             // fall through
 205
 206         case MCHT_NOWHERE:
 207         case MCHT_CALENDARBK:
 208         case MCHT_TITLEBK:
 209         case MCHT_TITLEMONTH:
 210         case MCHT_TITLEYEAR:
 211             return wxCAL_HITTEST_NOWHERE;
 212
 213         case MCHT_CALENDARDATE:
 214             if ( date )
 215                 date->SetFromMSWSysDate(hti.st);
 216             return wxCAL_HITTEST_DAY;
 217
 218         case MCHT_CALENDARDAY:
 219             if ( wd )
 220             {
 221                 int day = hti.st.wDayOfWeek;
 222
 223                 // the native control returns incorrect day of the week when
 224                 // the first day isn't Monday, i.e. the first column is always
 225                 // "Monday" even if its label is "Sunday", compensate for it
 226                 const int first = LOWORD(MonthCal_GetFirstDayOfWeek(GetHwnd()));
 227                 if ( first == MonthCal_Monday )
 228                 {
 229                     // as MonthCal_Monday is 0 while wxDateTime::Mon is 1,
 230                     // normally we need to do this to transform from MSW
 231                     // convention to wx one
 232                     day++;
 233                     day %= 7;
 234                 }
 235                 //else: but when the first day is MonthCal_Sunday, the native
 236                 //      control still returns 0 (i.e. MonthCal_Monday) for the
 237                 //      first column which looks like a bug in it but to work
 238                 //      around it it's enough to not apply the correction above
 239
 240                 *wd = static_cast<wxDateTime::WeekDay>(day);
 241             }
 242             return wxCAL_HITTEST_HEADER;
 243
 244         case MCHT_TITLEBTNNEXT:
 245             return wxCAL_HITTEST_INCMONTH;
 246
 247         case MCHT_TITLEBTNPREV:
 248             return wxCAL_HITTEST_DECMONTH;
 249
 250         case MCHT_CALENDARDATENEXT:
 251         case MCHT_CALENDARDATEPREV:
 252             return wxCAL_HITTEST_SURROUNDING_WEEK;
 253     }
 254 }
 255
 256 // ----------------------------------------------------------------------------
 257 // wxCalendarCtrl operations
 258 // ----------------------------------------------------------------------------
 259
 260 bool wxCalendarCtrl::SetDate(const wxDateTime& dt)
 261 {
 262     wxCHECK_MSG( dt.IsValid(), false, "invalid date" );
 263
 264     SYSTEMTIME st;
 265     dt.GetAsMSWSysDate(&st);
 266     if ( !MonthCal_SetCurSel(GetHwnd(), &st) )
 267     {
 268         wxLogDebug(wxT("DateTime_SetSystemtime() failed"));
 269
 270         return false;
 271     }
 272
 273     m_date = dt.GetDateOnly();
 274
 275     return true;
 276 }
 277
 278 wxDateTime wxCalendarCtrl::GetDate() const
 279 {
 280 #if wxDEBUG_LEVEL
 281     SYSTEMTIME st;
 282
 283     if ( !MonthCal_GetCurSel(GetHwnd(), &st) )
 284     {
 285         wxASSERT_MSG( !m_date.IsValid(), "mismatch between data and control" );
 286
 287         return wxDefaultDateTime;
 288     }
 289
 290     wxDateTime dt;
 291     dt.SetFromMSWSysDate(st);
 292
 293     // Windows XP and earlier didn't include the time component into the
 294     // returned date but Windows 7 does, so we can't compare the full objects
 295     // in the same way under all the Windows versions, just compare their date
 296     // parts
 297     wxASSERT_MSG( dt.IsSameDate(m_date), "mismatch between data and control" );
 298 #endif // wxDEBUG_LEVEL
 299
 300     return m_date;
 301 }
 302
 303 bool wxCalendarCtrl::SetDateRange(const wxDateTime& dt1, const wxDateTime& dt2)
 304 {
 305     SYSTEMTIME st[2];
 306
 307     DWORD flags = 0;
 308     if ( dt1.IsValid() )
 309     {
 310         dt1.GetAsMSWSysTime(st + 0);
 311         flags |= GDTR_MIN;
 312     }
 313
 314     if ( dt2.IsValid() )
 315     {
 316         dt2.GetAsMSWSysTime(st + 1);
 317         flags |= GDTR_MAX;
 318     }
 319
 320     if ( !MonthCal_SetRange(GetHwnd(), flags, st) )
 321     {
 322         wxLogDebug(wxT("MonthCal_SetRange() failed"));
 323     }
 324
 325     return flags != 0;
 326 }
 327
 328 bool wxCalendarCtrl::GetDateRange(wxDateTime *dt1, wxDateTime *dt2) const
 329 {
 330     SYSTEMTIME st[2];
 331
 332     DWORD flags = MonthCal_GetRange(GetHwnd(), st);
 333     if ( dt1 )
 334     {
 335         if ( flags & GDTR_MIN )
 336             dt1->SetFromMSWSysDate(st[0]);
 337         else
 338             *dt1 = wxDefaultDateTime;
 339     }
 340
 341     if ( dt2 )
 342     {
 343         if ( flags & GDTR_MAX )
 344             dt2->SetFromMSWSysDate(st[1]);
 345         else
 346             *dt2 = wxDefaultDateTime;
 347     }
 348
 349     return flags != 0;
 350 }
 351
 352 // ----------------------------------------------------------------------------
 353 // other wxCalendarCtrl operations
 354 // ----------------------------------------------------------------------------
 355
 356 bool wxCalendarCtrl::EnableMonthChange(bool enable)
 357 {
 358     if ( !wxCalendarCtrlBase::EnableMonthChange(enable) )
 359         return false;
 360
 361     wxDateTime dtStart, dtEnd;
 362     if ( !enable )
 363     {
 364         dtStart = GetDate();
 365         dtStart.SetDay(1);
 366
 367         dtEnd = dtStart.GetLastMonthDay();
 368     }
 369     //else: leave them invalid to remove the restriction
 370
 371     SetDateRange(dtStart, dtEnd);
 372
 373     return true;
 374 }
 375
 376 void wxCalendarCtrl::Mark(size_t day, bool mark)
 377 {
 378     wxCHECK_RET( day > 0 && day < 32, "invalid day" );
 379
 380     int mask = 1 << (day - 1);
 381     if ( mark )
 382         m_marks |= mask;
 383     else
 384         m_marks &= ~mask;
 385
 386     // calling Refresh() here is not enough to change the day appearance
 387     UpdateMarks();
 388 }
 389
 390 void wxCalendarCtrl::SetHoliday(size_t day)
 391 {
 392     wxCHECK_RET( day > 0 && day < 32, "invalid day" );
 393
 394     m_holidays |= 1 << (day - 1);
 395 }
 396
 397 void wxCalendarCtrl::UpdateMarks()
 398 {
 399     // Currently the native control may show more than one month if its size is
 400     // big enough. Ideal would be to prevent this from happening but there
 401     // doesn't seem to be any obvious way to do it, so for now just handle the
 402     // possibility that we can display several of them: one before the current
 403     // one and up to 12 after it.
 404     MONTHDAYSTATE states[14] = { 0 };
 405     const DWORD nMonths = MonthCal_GetMonthRange(GetHwnd(), GMR_DAYSTATE, NULL);
 406
 407     // although in principle the calendar might not show any days from the
 408     // preceding months, it seems like it always does, consider e.g. Feb 2010
 409     // which starts on Monday and ends on Sunday and so could fit on 4 lines
 410     // without showing any subsequent months -- the standard control still
 411     // shows it on 6 lines and the number of visible months is still 3
 412     //
 413     // OTOH Windows 7 control can show all 12 months or even years or decades
 414     // in its window if you "zoom out" of it by double clicking on free areas
 415     // so the return value can be (much, in case of decades view) greater than
 416     // 3 but in this case marks are not visible anyhow so simply ignore it
 417     if ( nMonths >= 2 && nMonths <= WXSIZEOF(states) )
 418     {
 419         // The current, fully visible month is always the second one.
 420         states[1] = m_marks | m_holidays;
 421
 422         if ( !MonthCal_SetDayState(GetHwnd(), nMonths, states) )
 423         {
 424             wxLogLastError(wxT("MonthCal_SetDayState"));
 425         }
 426     }
 427     //else: not a month view at all
 428 }
 429
 430 void wxCalendarCtrl::UpdateFirstDayOfWeek()
 431 {
 432     MonthCal_SetFirstDayOfWeek(GetHwnd(),
 433                                HasFlag(wxCAL_MONDAY_FIRST) ? MonthCal_Monday
 434                                                            : MonthCal_Sunday);
 435 }
 436
 437 // ----------------------------------------------------------------------------
 438 // wxCalendarCtrl events
 439 // ----------------------------------------------------------------------------
 440
 441 bool wxCalendarCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 442 {
 443     NMHDR* hdr = (NMHDR *)lParam;
 444     switch ( hdr->code )
 445     {
 446         case MCN_SELCHANGE:
 447             {
 448                 // we need to update m_date first, before calling the user code
 449                 // which expects GetDate() to return the new date
 450                 const wxDateTime dateOld = m_date;
 451                 const NMSELCHANGE * const sch = (NMSELCHANGE *)lParam;
 452                 m_date.SetFromMSWSysDate(sch->stSelStart);
 453
 454                 // changing the year or the month results in a second dummy
 455                 // MCN_SELCHANGE event on this system which doesn't really
 456                 // change anything -- filter it out
 457                 if ( m_date != dateOld )
 458                 {
 459                     if ( GenerateAllChangeEvents(dateOld) )
 460                     {
 461                         // month changed, need to update the holidays if we use
 462                         // them
 463                         SetHolidayAttrs();
 464                         UpdateMarks();
 465                     }
 466                 }
 467             }
 468             break;
 469
 470         case MCN_GETDAYSTATE:
 471             {
 472                 const NMDAYSTATE * const ds = (NMDAYSTATE *)lParam;
 473
 474                 wxDateTime startDate;
 475                 startDate.SetFromMSWSysDate(ds->stStart);
 476
 477                 wxDateTime currentDate = m_date;
 478                 // Set to the start of month for comparison with startDate to
 479                 // work correctly.
 480                 currentDate.SetDay(1);
 481
 482                 for ( int i = 0; i < ds->cDayState; i++ )
 483                 {
 484                     // set holiday/marks only for the "current" month
 485                     if ( startDate == currentDate )
 486                         ds->prgDayState[i] = m_marks | m_holidays;
 487                     else
 488                         ds->prgDayState[i] = 0;
 489
 490                     startDate += wxDateSpan::Month();
 491                 }
 492             }
 493             break;
 494
 495         default:
 496             return wxCalendarCtrlBase::MSWOnNotify(idCtrl, lParam, result);
 497     }
 498
 499     *result = 0;
 500     return true;
 501 }
 502
 503 void wxCalendarCtrl::MSWOnDoubleClick(wxMouseEvent& event)
 504 {
 505     if ( HitTest(event.GetPosition()) == wxCAL_HITTEST_DAY )
 506     {
 507         if ( GenerateEvent(wxEVT_CALENDAR_DOUBLECLICKED) )
 508             return; // skip event.Skip() below
 509     }
 510
 511     event.Skip();
 512 }
 513
 514 void wxCalendarCtrl::MSWOnClick(wxMouseEvent& event)
 515 {
 516     // for some reason, the control doesn't get focus on its own when the user
 517     // clicks in it
 518     SetFocus();
 519
 520     event.Skip();
 521 }
 522
 523 #endif // wxUSE_CALENDARCTRL