src/msw/pen.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/pen.cpp
   3 // Purpose:     wxPen
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin: refactored wxPen code to wxPenRefData
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   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 #include "wx/pen.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/bitmap.h"
  31     #include "wx/utils.h"
  32 #endif
  33
  34 #include "wx/msw/private.h"
  35
  36 #define M_PENDATA ((wxPenRefData*)m_refData)
  37
  38 // Win32 has ExtCreatePen() but WinCE doesn't
  39 #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
  40     #define wxHAVE_EXT_CREATE_PEN
  41 #endif
  42
  43 // ----------------------------------------------------------------------------
  44 // wxPenRefData: contains information about an HPEN and its handle
  45 // ----------------------------------------------------------------------------
  46
  47 class WXDLLEXPORT wxPenRefData : public wxGDIRefData
  48 {
  49 public:
  50     // ctors and dtor
  51     // --------------
  52
  53     wxPenRefData();
  54     wxPenRefData(const wxPenRefData& data);
  55     wxPenRefData(const wxColour& col, int width, wxPenStyle style);
  56     wxPenRefData(const wxBitmap& stipple, int width);
  57     virtual ~wxPenRefData();
  58
  59     bool operator==(const wxPenRefData& data) const
  60     {
  61         // we intentionally don't compare m_hPen fields here
  62         return m_style == data.m_style &&
  63                m_width == data.m_width &&
  64                m_join == data.m_join &&
  65                m_cap == data.m_cap &&
  66                m_colour == data.m_colour &&
  67                (m_style != wxPENSTYLE_STIPPLE || m_stipple.IsSameAs(data.m_stipple)) &&
  68                (m_style != wxPENSTYLE_USER_DASH ||
  69                 (m_nbDash == data.m_nbDash &&
  70                     memcmp(m_dash, data.m_dash, m_nbDash*sizeof(wxDash)) == 0));
  71     }
  72
  73
  74     // accessors and setters
  75     // ---------------------
  76
  77     wxColour& GetColour() const { return wx_const_cast(wxColour&, m_colour); }
  78     int GetWidth() const { return m_width; }
  79     wxPenStyle GetStyle() const { return m_style; }
  80     wxPenJoin GetJoin() const { return m_join; }
  81     wxPenCap GetCap() const { return m_cap; }
  82     wxDash* GetDash() const { return m_dash; }
  83     int GetDashCount() const { return m_nbDash; }
  84     wxBitmap* GetStipple() const { return wx_const_cast(wxBitmap *, &m_stipple); }
  85
  86     void SetColour(const wxColour& col) { Free(); m_colour = col; }
  87     void SetWidth(int width) { Free(); m_width = width; }
  88     void SetStyle(wxPenStyle style) { Free(); m_style = style; }
  89     void SetStipple(const wxBitmap& stipple)
  90     {
  91         Free();
  92
  93         m_style = wxPENSTYLE_STIPPLE;
  94         m_stipple = stipple;
  95     }
  96
  97     void SetDashes(int nb_dashes, const wxDash *dash)
  98     {
  99         Free();
 100
 101         m_nbDash = nb_dashes;
 102         m_dash = wx_const_cast(wxDash *, dash);
 103     }
 104
 105     void SetJoin(wxPenJoin join) { Free(); m_join = join; }
 106     void SetCap(wxPenCap cap) { Free(); m_cap = cap; }
 107
 108
 109     // HPEN management
 110     // ---------------
 111
 112     // create the HPEN if we don't have it yet
 113     bool Alloc();
 114
 115     // get the HPEN creating it on demand
 116     WXHPEN GetHPEN() const;
 117
 118     // return true if we have a valid HPEN
 119     bool HasHPEN() const { return m_hPen != 0; }
 120
 121     // return true if we had a valid handle before, false otherwise
 122     bool Free();
 123
 124 private:
 125     // initialize the fields which have reasonable default values
 126     //
 127     // doesn't initialize m_width and m_style which must be initialize in ctor
 128     void Init()
 129     {
 130         m_join = wxJOIN_ROUND;
 131         m_cap = wxCAP_ROUND;
 132         m_nbDash = 0;
 133         m_dash = NULL;
 134         m_hPen = 0;
 135     }
 136
 137     int           m_width;
 138     wxPenStyle    m_style;
 139     wxPenJoin     m_join;
 140     wxPenCap      m_cap;
 141     wxBitmap      m_stipple;
 142     int           m_nbDash;
 143     wxDash *      m_dash;
 144     wxColour      m_colour;
 145     HPEN          m_hPen;
 146
 147     DECLARE_NO_ASSIGN_CLASS(wxPenRefData)
 148 };
 149
 150 // ============================================================================
 151 // implementation
 152 // ============================================================================
 153
 154 // ----------------------------------------------------------------------------
 155 // wxPenRefData ctors/dtor
 156 // ----------------------------------------------------------------------------
 157
 158 wxPenRefData::wxPenRefData()
 159 {
 160     Init();
 161
 162     m_style = wxPENSTYLE_SOLID;
 163     m_width = 1;
 164 }
 165
 166 wxPenRefData::wxPenRefData(const wxPenRefData& data)
 167              :wxGDIRefData()
 168 {
 169     m_style = data.m_style;
 170     m_width = data.m_width;
 171     m_join = data.m_join;
 172     m_cap = data.m_cap;
 173     m_nbDash = data.m_nbDash;
 174     m_dash = data.m_dash;
 175     m_colour = data.m_colour;
 176     m_hPen = 0;
 177 }
 178
 179 wxPenRefData::wxPenRefData(const wxColour& col, int width, wxPenStyle style)
 180 {
 181     Init();
 182
 183     m_style = style;
 184     m_width = width;
 185
 186     m_colour = col;
 187 }
 188
 189 wxPenRefData::wxPenRefData(const wxBitmap& stipple, int width)
 190 {
 191     Init();
 192
 193     m_style = wxPENSTYLE_STIPPLE;
 194     m_width = width;
 195
 196     m_stipple = stipple;
 197 }
 198
 199 wxPenRefData::~wxPenRefData()
 200 {
 201     if ( m_hPen )
 202         ::DeleteObject(m_hPen);
 203 }
 204
 205 // ----------------------------------------------------------------------------
 206 // wxPenRefData HPEN management
 207 // ----------------------------------------------------------------------------
 208
 209 static int ConvertPenStyle(wxPenStyle style)
 210 {
 211     switch ( style )
 212     {
 213         case wxPENSTYLE_SHORT_DASH:
 214         case wxPENSTYLE_LONG_DASH:
 215             return PS_DASH;
 216
 217         case wxPENSTYLE_TRANSPARENT:
 218             return PS_NULL;
 219
 220         default:
 221             wxFAIL_MSG( _T("unknown pen style") );
 222             // fall through
 223
 224 #ifdef wxHAVE_EXT_CREATE_PEN
 225         case wxPENSTYLE_DOT:
 226             return PS_DOT;
 227
 228         case wxPENSTYLE_DOT_DASH:
 229             return PS_DASHDOT;
 230
 231         case wxPENSTYLE_USER_DASH:
 232             return PS_USERSTYLE;
 233
 234         case wxPENSTYLE_STIPPLE:
 235         case wxPENSTYLE_BDIAGONAL_HATCH:
 236         case wxPENSTYLE_CROSSDIAG_HATCH:
 237         case wxPENSTYLE_FDIAGONAL_HATCH:
 238         case wxPENSTYLE_CROSS_HATCH:
 239         case wxPENSTYLE_HORIZONTAL_HATCH:
 240         case wxPENSTYLE_VERTICAL_HATCH:
 241         case wxPENSTYLE_SOLID:
 242 #endif // wxHAVE_EXT_CREATE_PEN
 243
 244             return PS_SOLID;
 245     }
 246 }
 247
 248 #ifdef wxHAVE_EXT_CREATE_PEN
 249
 250 static int ConvertJoinStyle(wxPenJoin join)
 251 {
 252     switch( join )
 253     {
 254         case wxJOIN_BEVEL:
 255             return PS_JOIN_BEVEL;
 256
 257         case wxJOIN_MITER:
 258             return PS_JOIN_MITER;
 259
 260         default:
 261             wxFAIL_MSG( _T("unknown pen join style") );
 262             // fall through
 263
 264         case wxJOIN_ROUND:
 265             return PS_JOIN_ROUND;
 266     }
 267 }
 268
 269 static int ConvertCapStyle(wxPenCap cap)
 270 {
 271     switch ( cap )
 272     {
 273         case wxCAP_PROJECTING:
 274             return PS_ENDCAP_SQUARE;
 275
 276         case wxCAP_BUTT:
 277             return PS_ENDCAP_FLAT;
 278
 279         default:
 280             wxFAIL_MSG( _T("unknown pen cap style") );
 281             // fall through
 282
 283         case wxCAP_ROUND:
 284             return PS_ENDCAP_ROUND;
 285     }
 286 }
 287
 288 #endif // wxHAVE_EXT_CREATE_PEN
 289
 290 bool wxPenRefData::Alloc()
 291 {
 292    if ( m_hPen )
 293        return false;
 294
 295    if ( m_style == wxPENSTYLE_TRANSPARENT )
 296    {
 297        m_hPen = (HPEN)::GetStockObject(NULL_PEN);
 298        return true;
 299    }
 300
 301    const COLORREF col = m_colour.GetPixel();
 302
 303 #ifdef wxHAVE_EXT_CREATE_PEN
 304    // Only NT can display dashed or dotted lines with width > 1
 305    static const int os = wxGetOsVersion();
 306    if ( os != wxOS_WINDOWS_NT &&
 307            (m_style == wxPENSTYLE_DOT ||
 308             m_style == wxPENSTYLE_LONG_DASH ||
 309             m_style == wxPENSTYLE_SHORT_DASH ||
 310             m_style == wxPENSTYLE_DOT_DASH ||
 311             m_style == wxPENSTYLE_USER_DASH) &&
 312             m_width > 1 )
 313    {
 314        m_width = 1;
 315    }
 316
 317    // check if it's a standard kind of pen which can be created with just
 318    // CreatePen()
 319    if ( m_join == wxJOIN_ROUND &&
 320             m_cap == wxCAP_ROUND &&
 321                 m_style != wxPENSTYLE_USER_DASH &&
 322                     m_style != wxPENSTYLE_STIPPLE &&
 323                         (m_width <= 1 || m_style == wxPENSTYLE_SOLID) )
 324 #endif // !wxHAVE_EXT_CREATE_PEN
 325    {
 326        m_hPen = ::CreatePen(ConvertPenStyle(m_style), m_width, col);
 327    }
 328 #ifdef wxHAVE_EXT_CREATE_PEN
 329    else // need to use ExtCreatePen()
 330    {
 331        DWORD styleMSW = PS_GEOMETRIC |
 332                         ConvertPenStyle(m_style) |
 333                         ConvertJoinStyle(m_join) |
 334                         ConvertCapStyle(m_cap);
 335
 336        LOGBRUSH lb;
 337        switch( m_style )
 338        {
 339            case wxPENSTYLE_STIPPLE:
 340                lb.lbStyle = BS_PATTERN;
 341                lb.lbHatch = wxPtrToUInt(m_stipple.GetHBITMAP());
 342                break;
 343
 344            case wxPENSTYLE_BDIAGONAL_HATCH:
 345                lb.lbStyle = BS_HATCHED;
 346                lb.lbHatch = HS_BDIAGONAL;
 347                break;
 348
 349            case wxPENSTYLE_CROSSDIAG_HATCH:
 350                lb.lbStyle = BS_HATCHED;
 351                lb.lbHatch = HS_DIAGCROSS;
 352                break;
 353
 354            case wxPENSTYLE_FDIAGONAL_HATCH:
 355                lb.lbStyle = BS_HATCHED;
 356                lb.lbHatch = HS_FDIAGONAL;
 357                break;
 358
 359            case wxPENSTYLE_CROSS_HATCH:
 360                lb.lbStyle = BS_HATCHED;
 361                lb.lbHatch = HS_CROSS;
 362                break;
 363
 364            case wxPENSTYLE_HORIZONTAL_HATCH:
 365                lb.lbStyle = BS_HATCHED;
 366                lb.lbHatch = HS_HORIZONTAL;
 367                break;
 368
 369            case wxPENSTYLE_VERTICAL_HATCH:
 370                lb.lbStyle = BS_HATCHED;
 371                lb.lbHatch = HS_VERTICAL;
 372                break;
 373
 374            default:
 375                lb.lbStyle = BS_SOLID;
 376 #ifdef __WXDEBUG__
 377                // this should be unnecessary (it's unused) but suppresses the
 378                // Purify messages about uninitialized memory read
 379                lb.lbHatch = 0;
 380 #endif
 381                break;
 382        }
 383
 384        lb.lbColor = col;
 385
 386        DWORD *dash;
 387        if ( m_style == wxPENSTYLE_USER_DASH && m_nbDash && m_dash )
 388        {
 389            dash = new DWORD[m_nbDash];
 390            int rw = m_width > 1 ? m_width : 1;
 391            for ( int i = 0; i < m_nbDash; i++ )
 392                dash[i] = m_dash[i] * rw;
 393        }
 394        else
 395        {
 396            dash = NULL;
 397        }
 398
 399        m_hPen = ::ExtCreatePen(styleMSW, m_width, &lb, m_nbDash, (LPDWORD)dash);
 400
 401        delete [] dash;
 402    }
 403 #endif // wxHAVE_EXT_CREATE_PEN
 404
 405    return m_hPen != 0;
 406 }
 407
 408 bool wxPenRefData::Free()
 409 {
 410     if ( !m_hPen )
 411         return false;
 412
 413     ::DeleteObject(m_hPen);
 414     m_hPen = 0;
 415
 416     return true;
 417 }
 418
 419 WXHPEN wxPenRefData::GetHPEN() const
 420 {
 421     if ( !m_hPen )
 422         wx_const_cast(wxPenRefData *, this)->Alloc();
 423
 424     return (WXHPEN)m_hPen;
 425 }
 426
 427 // ----------------------------------------------------------------------------
 428 // wxPen
 429 // ----------------------------------------------------------------------------
 430
 431 IMPLEMENT_DYNAMIC_CLASS(wxPen, wxGDIObject)
 432
 433 wxPen::wxPen(const wxColour& col, int width, wxPenStyle style)
 434 {
 435     m_refData = new wxPenRefData(col, width, style);
 436 }
 437
 438 /* error: `wxBrushStyle' has not been declared
 439 wxPen::wxPen(const wxColour& colour, int width, wxBrushStyle style)
 440 {
 441     m_refData = new wxPenRefData(colour, width, (wxPenStyle)style);
 442 }
 443 */
 444
 445 wxPen::wxPen(const wxBitmap& stipple, int width)
 446 {
 447     m_refData = new wxPenRefData(stipple, width);
 448 }
 449
 450 bool wxPen::operator==(const wxPen& pen) const
 451 {
 452     const wxPenRefData *
 453         penData = wx_static_cast(const wxPenRefData *, pen.m_refData);
 454
 455     // an invalid pen is only equal to another invalid pen
 456     return m_refData ? penData && *M_PENDATA == *penData : !penData;
 457 }
 458
 459 bool wxPen::RealizeResource()
 460 {
 461     return M_PENDATA && M_PENDATA->Alloc();
 462 }
 463
 464 WXHANDLE wxPen::GetResourceHandle() const
 465 {
 466     return M_PENDATA ? M_PENDATA->GetHPEN() : 0;
 467 }
 468
 469 bool wxPen::FreeResource(bool WXUNUSED(force))
 470 {
 471     return M_PENDATA && M_PENDATA->Free();
 472 }
 473
 474 bool wxPen::IsFree() const
 475 {
 476     return M_PENDATA && !M_PENDATA->HasHPEN();
 477 }
 478
 479 wxGDIRefData* wxPen::CreateGDIRefData() const
 480 {
 481     return new wxPenRefData;
 482 }
 483
 484 wxGDIRefData* wxPen::CloneGDIRefData(const wxGDIRefData* data) const
 485 {
 486     return new wxPenRefData(*wx_static_cast(const wxPenRefData*, data));
 487 }
 488
 489 void wxPen::SetColour(const wxColour& col)
 490 {
 491     AllocExclusive();
 492
 493     M_PENDATA->SetColour(col);
 494 }
 495
 496 void wxPen::SetColour(unsigned char r, unsigned char g, unsigned char b)
 497 {
 498     SetColour(wxColour(r, g, b));
 499 }
 500
 501 void wxPen::SetWidth(int width)
 502 {
 503     AllocExclusive();
 504
 505     M_PENDATA->SetWidth(width);
 506 }
 507
 508 void wxPen::SetStyle(wxPenStyle style)
 509 {
 510     AllocExclusive();
 511
 512     M_PENDATA->SetStyle(style);
 513 }
 514
 515 void wxPen::SetStipple(const wxBitmap& stipple)
 516 {
 517     AllocExclusive();
 518
 519     M_PENDATA->SetStipple(stipple);
 520 }
 521
 522 void wxPen::SetDashes(int nb_dashes, const wxDash *dash)
 523 {
 524     AllocExclusive();
 525
 526     M_PENDATA->SetDashes(nb_dashes, dash);
 527 }
 528
 529 void wxPen::SetJoin(wxPenJoin join)
 530 {
 531     AllocExclusive();
 532
 533     M_PENDATA->SetJoin(join);
 534 }
 535
 536 void wxPen::SetCap(wxPenCap cap)
 537 {
 538     AllocExclusive();
 539
 540     M_PENDATA->SetCap(cap);
 541 }
 542
 543 wxColour& wxPen::GetColour() const
 544 {
 545     return m_refData ? M_PENDATA->GetColour() : wxNullColour;
 546 }
 547
 548 int wxPen::GetWidth() const
 549 {
 550     return m_refData ? M_PENDATA->GetWidth() : 0;
 551 }
 552
 553 wxPenStyle wxPen::GetStyle() const
 554 {
 555     return m_refData ? M_PENDATA->GetStyle() : wxPENSTYLE_MAX;
 556 }
 557
 558 wxPenJoin wxPen::GetJoin() const
 559 {
 560     return m_refData ? M_PENDATA->GetJoin() : wxJOIN_INVALID;
 561 }
 562
 563 wxPenCap wxPen::GetCap() const
 564 {
 565     return m_refData ? M_PENDATA->GetCap() : wxCAP_INVALID;
 566 }
 567
 568 int wxPen::GetDashes(wxDash** ptr) const
 569 {
 570     if ( !m_refData )
 571     {
 572         *ptr = NULL;
 573         return 0;
 574     }
 575
 576     *ptr = M_PENDATA->GetDash();
 577     return M_PENDATA->GetDashCount();
 578 }
 579
 580 wxDash* wxPen::GetDash() const
 581 {
 582     return m_refData ? M_PENDATA->GetDash() : NULL;
 583 }
 584
 585 int wxPen::GetDashCount() const
 586 {
 587     return m_refData ? M_PENDATA->GetDashCount() : 0;
 588 }
 589
 590 wxBitmap* wxPen::GetStipple() const
 591 {
 592     return m_refData ? M_PENDATA->GetStipple() : NULL;
 593 }