include/wx/geometry.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/geometry.h
   3 // Purpose:     Common Geometry Classes
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     08/05/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GEOMETRY_H_
  13 #define _WX_GEOMETRY_H_
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_GEOMETRY
  18
  19 #include "wx/utils.h"
  20 #include "wx/gdicmn.h"
  21 #include "wx/math.h"
  22
  23 class WXDLLIMPEXP_FWD_BASE wxDataInputStream;
  24 class WXDLLIMPEXP_FWD_BASE wxDataOutputStream;
  25
  26 // clipping from Cohen-Sutherland
  27
  28 enum wxOutCode
  29 {
  30     wxInside = 0x00 ,
  31     wxOutLeft = 0x01 ,
  32     wxOutRight = 0x02 ,
  33     wxOutTop = 0x08 ,
  34     wxOutBottom = 0x04
  35 };
  36
  37 class WXDLLIMPEXP_CORE wxPoint2DInt
  38 {
  39 public :
  40     inline wxPoint2DInt();
  41     inline wxPoint2DInt( wxInt32 x , wxInt32 y );
  42     inline wxPoint2DInt( const wxPoint2DInt &pt );
  43     inline wxPoint2DInt( const wxPoint &pt );
  44
  45     // noops for this class, just return the coords
  46     inline void GetFloor( wxInt32 *x , wxInt32 *y ) const;
  47     inline void GetRounded( wxInt32 *x , wxInt32 *y ) const;
  48
  49     inline wxDouble GetVectorLength() const;
  50            wxDouble GetVectorAngle() const;
  51     inline void SetVectorLength( wxDouble length );
  52            void SetVectorAngle( wxDouble degrees );
  53            void SetPolarCoordinates( wxInt32 angle , wxInt32 length );
  54     // set the vector length to 1.0, preserving the angle
  55     inline void Normalize();
  56
  57     inline wxDouble GetDistance( const wxPoint2DInt &pt ) const;
  58     inline wxDouble GetDistanceSquare( const wxPoint2DInt &pt ) const;
  59     inline wxInt32 GetDotProduct( const wxPoint2DInt &vec ) const;
  60     inline wxInt32 GetCrossProduct( const wxPoint2DInt &vec ) const;
  61
  62     // the reflection of this point
  63     inline wxPoint2DInt operator-();
  64
  65     inline wxPoint2DInt& operator=(const wxPoint2DInt& pt);
  66     inline wxPoint2DInt& operator+=(const wxPoint2DInt& pt);
  67     inline wxPoint2DInt& operator-=(const wxPoint2DInt& pt);
  68     inline wxPoint2DInt& operator*=(const wxPoint2DInt& pt);
  69     inline wxPoint2DInt& operator*=(wxDouble n);
  70     inline wxPoint2DInt& operator*=(wxInt32 n);
  71     inline wxPoint2DInt& operator/=(const wxPoint2DInt& pt);
  72     inline wxPoint2DInt& operator/=(wxDouble n);
  73     inline wxPoint2DInt& operator/=(wxInt32 n);
  74     inline operator wxPoint() const;
  75     inline bool operator==(const wxPoint2DInt& pt) const;
  76     inline bool operator!=(const wxPoint2DInt& pt) const;
  77
  78 #if wxUSE_STREAMS
  79     void WriteTo( wxDataOutputStream &stream ) const;
  80     void ReadFrom( wxDataInputStream &stream );
  81 #endif // wxUSE_STREAMS
  82
  83     wxInt32 m_x;
  84     wxInt32 m_y;
  85 };
  86
  87 inline wxPoint2DInt operator+(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2);
  88 inline wxPoint2DInt operator-(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2);
  89 inline wxPoint2DInt operator*(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2);
  90 inline wxPoint2DInt operator*(wxInt32 n , const wxPoint2DInt& pt);
  91 inline wxPoint2DInt operator*(const wxPoint2DInt& pt , wxInt32 n);
  92 inline wxPoint2DInt operator/(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2);
  93 inline wxPoint2DInt operator/(const wxPoint2DInt& pt , wxInt32 n);
  94
  95 inline wxPoint2DInt::wxPoint2DInt()
  96 {
  97     m_x = 0;
  98     m_y = 0;
  99 }
 100
 101 inline wxPoint2DInt::wxPoint2DInt( wxInt32 x , wxInt32 y )
 102 {
 103     m_x = x;
 104     m_y = y;
 105 }
 106
 107 inline wxPoint2DInt::wxPoint2DInt( const wxPoint2DInt &pt )
 108 {
 109     m_x = pt.m_x;
 110     m_y = pt.m_y;
 111 }
 112
 113 inline wxPoint2DInt::wxPoint2DInt( const wxPoint &pt )
 114 {
 115     m_x = pt.x;
 116     m_y = pt.y;
 117 }
 118
 119 inline void wxPoint2DInt::GetFloor( wxInt32 *x , wxInt32 *y ) const
 120 {
 121     if ( x )
 122         *x = m_x;
 123     if ( y )
 124         *y = m_y;
 125 }
 126
 127 inline void wxPoint2DInt::GetRounded( wxInt32 *x , wxInt32 *y ) const
 128 {
 129     GetFloor(x, y);
 130 }
 131
 132 inline wxDouble wxPoint2DInt::GetVectorLength() const
 133 {
 134     // cast needed MIPSpro compiler under SGI
 135     return sqrt( (double)(m_x)*(m_x) + (m_y)*(m_y) );
 136 }
 137
 138 inline void wxPoint2DInt::SetVectorLength( wxDouble length )
 139 {
 140     wxDouble before = GetVectorLength();
 141     m_x = (wxInt32)(m_x * length / before);
 142     m_y = (wxInt32)(m_y * length / before);
 143 }
 144
 145 inline void wxPoint2DInt::Normalize()
 146 {
 147     SetVectorLength( 1 );
 148 }
 149
 150 inline wxDouble wxPoint2DInt::GetDistance( const wxPoint2DInt &pt ) const
 151 {
 152     return sqrt( GetDistanceSquare( pt ) );
 153 }
 154
 155 inline wxDouble wxPoint2DInt::GetDistanceSquare( const wxPoint2DInt &pt ) const
 156 {
 157     return ( (pt.m_x-m_x)*(pt.m_x-m_x) + (pt.m_y-m_y)*(pt.m_y-m_y) );
 158 }
 159
 160 inline wxInt32 wxPoint2DInt::GetDotProduct( const wxPoint2DInt &vec ) const
 161 {
 162     return ( m_x * vec.m_x + m_y * vec.m_y );
 163 }
 164
 165 inline wxInt32 wxPoint2DInt::GetCrossProduct( const wxPoint2DInt &vec ) const
 166 {
 167     return ( m_x * vec.m_y - vec.m_x * m_y );
 168 }
 169
 170 inline wxPoint2DInt::operator wxPoint() const
 171 {
 172     return wxPoint( m_x, m_y);
 173 }
 174
 175 inline wxPoint2DInt wxPoint2DInt::operator-()
 176 {
 177     return wxPoint2DInt( -m_x, -m_y);
 178 }
 179
 180 inline wxPoint2DInt& wxPoint2DInt::operator=(const wxPoint2DInt& pt)
 181 {
 182     if (this != &pt)
 183     {
 184         m_x = pt.m_x;
 185         m_y = pt.m_y;
 186     }
 187     return *this;
 188 }
 189
 190 inline wxPoint2DInt& wxPoint2DInt::operator+=(const wxPoint2DInt& pt)
 191 {
 192     m_x = m_x + pt.m_x;
 193     m_y = m_y + pt.m_y;
 194     return *this;
 195 }
 196
 197 inline wxPoint2DInt& wxPoint2DInt::operator-=(const wxPoint2DInt& pt)
 198 {
 199     m_x = m_x - pt.m_x;
 200     m_y = m_y - pt.m_y;
 201     return *this;
 202 }
 203
 204 inline wxPoint2DInt& wxPoint2DInt::operator*=(const wxPoint2DInt& pt)
 205 {
 206     m_x = m_x + pt.m_x;
 207     m_y = m_y + pt.m_y;
 208     return *this;
 209 }
 210
 211 inline wxPoint2DInt& wxPoint2DInt::operator/=(const wxPoint2DInt& pt)
 212 {
 213     m_x = m_x - pt.m_x;
 214     m_y = m_y - pt.m_y;
 215     return *this;
 216 }
 217
 218 inline bool wxPoint2DInt::operator==(const wxPoint2DInt& pt) const
 219 {
 220     return m_x == pt.m_x && m_y == pt.m_y;
 221 }
 222
 223 inline bool wxPoint2DInt::operator!=(const wxPoint2DInt& pt) const
 224 {
 225     return m_x != pt.m_x || m_y != pt.m_y;
 226 }
 227
 228 inline wxPoint2DInt operator+(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2)
 229 {
 230     return wxPoint2DInt( pt1.m_x + pt2.m_x , pt1.m_y + pt2.m_y );
 231 }
 232
 233 inline wxPoint2DInt operator-(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2)
 234 {
 235     return wxPoint2DInt( pt1.m_x - pt2.m_x , pt1.m_y - pt2.m_y );
 236 }
 237
 238
 239 inline wxPoint2DInt operator*(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2)
 240 {
 241     return wxPoint2DInt( pt1.m_x * pt2.m_x , pt1.m_y * pt2.m_y );
 242 }
 243
 244 inline wxPoint2DInt operator*(wxInt32 n , const wxPoint2DInt& pt)
 245 {
 246     return wxPoint2DInt( pt.m_x * n , pt.m_y * n );
 247 }
 248
 249 inline wxPoint2DInt operator*(wxDouble n , const wxPoint2DInt& pt)
 250 {
 251     return wxPoint2DInt( (int) (pt.m_x * n) , (int) (pt.m_y * n) );
 252 }
 253
 254 inline wxPoint2DInt operator*(const wxPoint2DInt& pt , wxInt32 n)
 255 {
 256     return wxPoint2DInt( pt.m_x * n , pt.m_y * n );
 257 }
 258
 259 inline wxPoint2DInt operator*(const wxPoint2DInt& pt , wxDouble n)
 260 {
 261     return wxPoint2DInt( (int) (pt.m_x * n) , (int) (pt.m_y * n) );
 262 }
 263
 264 inline wxPoint2DInt operator/(const wxPoint2DInt& pt1 , const wxPoint2DInt& pt2)
 265 {
 266     return wxPoint2DInt( pt1.m_x / pt2.m_x , pt1.m_y / pt2.m_y );
 267 }
 268
 269 inline wxPoint2DInt operator/(const wxPoint2DInt& pt , wxInt32 n)
 270 {
 271     return wxPoint2DInt( pt.m_x / n , pt.m_y / n );
 272 }
 273
 274 inline wxPoint2DInt operator/(const wxPoint2DInt& pt , wxDouble n)
 275 {
 276     return wxPoint2DInt( (int) (pt.m_x / n) , (int) (pt.m_y / n) );
 277 }
 278
 279 // wxPoint2Ds represent a point or a vector in a 2d coordinate system
 280
 281 class WXDLLIMPEXP_CORE wxPoint2DDouble
 282 {
 283 public :
 284     inline wxPoint2DDouble();
 285     inline wxPoint2DDouble( wxDouble x , wxDouble y );
 286     inline wxPoint2DDouble( const wxPoint2DDouble &pt );
 287     wxPoint2DDouble( const wxPoint2DInt &pt )
 288         { m_x = (wxDouble) pt.m_x ; m_y = (wxDouble) pt.m_y ; }
 289     wxPoint2DDouble( const wxPoint &pt )
 290         { m_x = (wxDouble) pt.x ; m_y = (wxDouble) pt.y ; }
 291
 292     // two different conversions to integers, floor and rounding
 293     inline void GetFloor( wxInt32 *x , wxInt32 *y ) const;
 294     inline void GetRounded( wxInt32 *x , wxInt32 *y ) const;
 295
 296     inline wxDouble GetVectorLength() const;
 297      wxDouble GetVectorAngle() const ;
 298     void SetVectorLength( wxDouble length );
 299     void SetVectorAngle( wxDouble degrees );
 300     void SetPolarCoordinates( wxDouble angle , wxDouble length );
 301     // set the vector length to 1.0, preserving the angle
 302     void Normalize();
 303
 304     inline wxDouble GetDistance( const wxPoint2DDouble &pt ) const;
 305     inline wxDouble GetDistanceSquare( const wxPoint2DDouble &pt ) const;
 306     inline wxDouble GetDotProduct( const wxPoint2DDouble &vec ) const;
 307     inline wxDouble GetCrossProduct( const wxPoint2DDouble &vec ) const;
 308
 309     // the reflection of this point
 310     inline wxPoint2DDouble operator-();
 311
 312     inline wxPoint2DDouble& operator=(const wxPoint2DDouble& pt);
 313     inline wxPoint2DDouble& operator+=(const wxPoint2DDouble& pt);
 314     inline wxPoint2DDouble& operator-=(const wxPoint2DDouble& pt);
 315     inline wxPoint2DDouble& operator*=(const wxPoint2DDouble& pt);
 316     inline wxPoint2DDouble& operator*=(wxDouble n);
 317     inline wxPoint2DDouble& operator*=(wxInt32 n);
 318     inline wxPoint2DDouble& operator/=(const wxPoint2DDouble& pt);
 319     inline wxPoint2DDouble& operator/=(wxDouble n);
 320     inline wxPoint2DDouble& operator/=(wxInt32 n);
 321
 322     inline bool operator==(const wxPoint2DDouble& pt) const;
 323     inline bool operator!=(const wxPoint2DDouble& pt) const;
 324
 325     wxDouble m_x;
 326     wxDouble m_y;
 327 };
 328
 329 inline wxPoint2DDouble operator+(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2);
 330 inline wxPoint2DDouble operator-(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2);
 331 inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2);
 332 inline wxPoint2DDouble operator*(wxDouble n , const wxPoint2DDouble& pt);
 333 inline wxPoint2DDouble operator*(wxInt32 n , const wxPoint2DDouble& pt);
 334 inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt , wxDouble n);
 335 inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt , wxInt32 n);
 336 inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2);
 337 inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt , wxDouble n);
 338 inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt , wxInt32 n);
 339
 340 inline wxPoint2DDouble::wxPoint2DDouble()
 341 {
 342     m_x = 0.0;
 343     m_y = 0.0;
 344 }
 345
 346 inline wxPoint2DDouble::wxPoint2DDouble( wxDouble x , wxDouble y )
 347 {
 348     m_x = x;
 349     m_y = y;
 350 }
 351
 352 inline wxPoint2DDouble::wxPoint2DDouble( const wxPoint2DDouble &pt )
 353 {
 354     m_x = pt.m_x;
 355     m_y = pt.m_y;
 356 }
 357
 358 inline void wxPoint2DDouble::GetFloor( wxInt32 *x , wxInt32 *y ) const
 359 {
 360     *x = (wxInt32) floor( m_x );
 361     *y = (wxInt32) floor( m_y );
 362 }
 363
 364 inline void wxPoint2DDouble::GetRounded( wxInt32 *x , wxInt32 *y ) const
 365 {
 366     *x = (wxInt32) floor( m_x + 0.5 );
 367     *y = (wxInt32) floor( m_y + 0.5);
 368 }
 369
 370 inline wxDouble wxPoint2DDouble::GetVectorLength() const
 371 {
 372     return sqrt( (m_x)*(m_x) + (m_y)*(m_y) ) ;
 373 }
 374
 375 inline void wxPoint2DDouble::SetVectorLength( wxDouble length )
 376 {
 377     wxDouble before = GetVectorLength() ;
 378     m_x = (m_x * length / before) ;
 379     m_y = (m_y * length / before) ;
 380 }
 381
 382 inline void wxPoint2DDouble::Normalize()
 383 {
 384     SetVectorLength( 1 );
 385 }
 386
 387 inline wxDouble wxPoint2DDouble::GetDistance( const wxPoint2DDouble &pt ) const
 388 {
 389     return sqrt( GetDistanceSquare( pt ) );
 390 }
 391
 392 inline wxDouble wxPoint2DDouble::GetDistanceSquare( const wxPoint2DDouble &pt ) const
 393 {
 394     return ( (pt.m_x-m_x)*(pt.m_x-m_x) + (pt.m_y-m_y)*(pt.m_y-m_y) );
 395 }
 396
 397 inline wxDouble wxPoint2DDouble::GetDotProduct( const wxPoint2DDouble &vec ) const
 398 {
 399     return ( m_x * vec.m_x + m_y * vec.m_y );
 400 }
 401
 402 inline wxDouble wxPoint2DDouble::GetCrossProduct( const wxPoint2DDouble &vec ) const
 403 {
 404     return ( m_x * vec.m_y - vec.m_x * m_y );
 405 }
 406
 407 inline wxPoint2DDouble wxPoint2DDouble::operator-()
 408 {
 409     return wxPoint2DDouble( -m_x, -m_y);
 410 }
 411
 412 inline wxPoint2DDouble& wxPoint2DDouble::operator=(const wxPoint2DDouble& pt)
 413 {
 414     if (this != &pt)
 415     {
 416         m_x = pt.m_x;
 417         m_y = pt.m_y;
 418     }
 419     return *this;
 420 }
 421
 422 inline wxPoint2DDouble& wxPoint2DDouble::operator+=(const wxPoint2DDouble& pt)
 423 {
 424     m_x = m_x + pt.m_x;
 425     m_y = m_y + pt.m_y;
 426     return *this;
 427 }
 428
 429 inline wxPoint2DDouble& wxPoint2DDouble::operator-=(const wxPoint2DDouble& pt)
 430 {
 431     m_x = m_x - pt.m_x;
 432     m_y = m_y - pt.m_y;
 433     return *this;
 434 }
 435
 436 inline wxPoint2DDouble& wxPoint2DDouble::operator*=(const wxPoint2DDouble& pt)
 437 {
 438     m_x = m_x * pt.m_x;
 439     m_y = m_y * pt.m_y;
 440     return *this;
 441 }
 442
 443 inline wxPoint2DDouble& wxPoint2DDouble::operator/=(const wxPoint2DDouble& pt)
 444 {
 445     m_x = m_x / pt.m_x;
 446     m_y = m_y / pt.m_y;
 447     return *this;
 448 }
 449
 450 inline bool wxPoint2DDouble::operator==(const wxPoint2DDouble& pt) const
 451 {
 452     return wxIsSameDouble(m_x, pt.m_x) && wxIsSameDouble(m_y, pt.m_y);
 453 }
 454
 455 inline bool wxPoint2DDouble::operator!=(const wxPoint2DDouble& pt) const
 456 {
 457     return !(*this == pt);
 458 }
 459
 460 inline wxPoint2DDouble operator+(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2)
 461 {
 462     return wxPoint2DDouble( pt1.m_x + pt2.m_x , pt1.m_y + pt2.m_y );
 463 }
 464
 465 inline wxPoint2DDouble operator-(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2)
 466 {
 467     return wxPoint2DDouble( pt1.m_x - pt2.m_x , pt1.m_y - pt2.m_y );
 468 }
 469
 470
 471 inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2)
 472 {
 473     return wxPoint2DDouble( pt1.m_x * pt2.m_x , pt1.m_y * pt2.m_y );
 474 }
 475
 476 inline wxPoint2DDouble operator*(wxDouble n , const wxPoint2DDouble& pt)
 477 {
 478     return wxPoint2DDouble( pt.m_x * n , pt.m_y * n );
 479 }
 480
 481 inline wxPoint2DDouble operator*(wxInt32 n , const wxPoint2DDouble& pt)
 482 {
 483     return wxPoint2DDouble( pt.m_x * n , pt.m_y * n );
 484 }
 485
 486 inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt , wxDouble n)
 487 {
 488     return wxPoint2DDouble( pt.m_x * n , pt.m_y * n );
 489 }
 490
 491 inline wxPoint2DDouble operator*(const wxPoint2DDouble& pt , wxInt32 n)
 492 {
 493     return wxPoint2DDouble( pt.m_x * n , pt.m_y * n );
 494 }
 495
 496 inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt1 , const wxPoint2DDouble& pt2)
 497 {
 498     return wxPoint2DDouble( pt1.m_x / pt2.m_x , pt1.m_y / pt2.m_y );
 499 }
 500
 501 inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt , wxDouble n)
 502 {
 503     return wxPoint2DDouble( pt.m_x / n , pt.m_y / n );
 504 }
 505
 506 inline wxPoint2DDouble operator/(const wxPoint2DDouble& pt , wxInt32 n)
 507 {
 508     return wxPoint2DDouble( pt.m_x / n , pt.m_y / n );
 509 }
 510
 511 // wxRect2Ds are a axis-aligned rectangles, each side of the rect is parallel to the x- or m_y- axis. The rectangle is either defined by the
 512 // top left and bottom right corner, or by the top left corner and size. A point is contained within the rectangle if
 513 // left <= x < right  and top <= m_y < bottom , thus it is a half open interval.
 514
 515 class WXDLLIMPEXP_CORE wxRect2DDouble
 516 {
 517 public:
 518     wxRect2DDouble()
 519         { m_x = m_y = m_width = m_height = 0; }
 520     wxRect2DDouble(wxDouble x, wxDouble y, wxDouble w, wxDouble h)
 521         { m_x = x; m_y = y; m_width = w;  m_height = h; }
 522 /*
 523     wxRect2DDouble(const wxPoint2DDouble& topLeft, const wxPoint2DDouble& bottomRight);
 524     wxRect2DDouble(const wxPoint2DDouble& pos, const wxSize& size);
 525     wxRect2DDouble(const wxRect2DDouble& rect);
 526 */
 527         // single attribute accessors
 528
 529     inline wxPoint2DDouble GetPosition()
 530         { return wxPoint2DDouble(m_x, m_y); }
 531     inline wxSize GetSize()
 532         { return wxSize((int) m_width, (int) m_height); }
 533
 534     // for the edge and corner accessors there are two setters counterparts, the Set.. functions keep the other corners at their
 535         // position whenever sensible, the Move.. functions keep the size of the rect and move the other corners appropriately
 536
 537     inline wxDouble GetLeft() const { return m_x; }
 538     inline void SetLeft( wxDouble n ) { m_width += m_x - n; m_x = n; }
 539     inline void MoveLeftTo( wxDouble n ) { m_x = n; }
 540     inline wxDouble GetTop() const { return m_y; }
 541     inline void SetTop( wxDouble n ) { m_height += m_y - n; m_y = n; }
 542     inline void MoveTopTo( wxDouble n ) { m_y = n; }
 543     inline wxDouble GetBottom() const { return m_y + m_height; }
 544     inline void SetBottom( wxDouble n ) { m_height += n - (m_y+m_height);}
 545     inline void MoveBottomTo( wxDouble n ) { m_y = n - m_height; }
 546     inline wxDouble GetRight() const { return m_x + m_width; }
 547     inline void SetRight( wxDouble n ) { m_width += n - (m_x+m_width) ; }
 548     inline void MoveRightTo( wxDouble n ) { m_x = n - m_width; }
 549
 550     inline wxPoint2DDouble GetLeftTop() const
 551         { return wxPoint2DDouble( m_x , m_y ); }
 552     inline void SetLeftTop( const wxPoint2DDouble &pt )
 553         { m_width += m_x - pt.m_x; m_height += m_y - pt.m_y; m_x = pt.m_x; m_y = pt.m_y; }
 554     inline void MoveLeftTopTo( const wxPoint2DDouble &pt )
 555         { m_x = pt.m_x; m_y = pt.m_y; }
 556     inline wxPoint2DDouble GetLeftBottom() const
 557         { return wxPoint2DDouble( m_x , m_y + m_height ); }
 558     inline void SetLeftBottom( const wxPoint2DDouble &pt )
 559         { m_width += m_x - pt.m_x; m_height += pt.m_y - (m_y+m_height) ; m_x = pt.m_x; }
 560     inline void MoveLeftBottomTo( const wxPoint2DDouble &pt )
 561         { m_x = pt.m_x; m_y = pt.m_y - m_height; }
 562     inline wxPoint2DDouble GetRightTop() const
 563         { return wxPoint2DDouble( m_x+m_width , m_y ); }
 564     inline void SetRightTop( const wxPoint2DDouble &pt )
 565         { m_width += pt.m_x - ( m_x + m_width ); m_height += m_y - pt.m_y; m_y = pt.m_y; }
 566     inline void MoveRightTopTo( const wxPoint2DDouble &pt )
 567         { m_x = pt.m_x - m_width; m_y = pt.m_y; }
 568     inline wxPoint2DDouble GetRightBottom() const
 569         { return wxPoint2DDouble( m_x+m_width , m_y + m_height ); }
 570     inline void SetRightBottom( const wxPoint2DDouble &pt )
 571         { m_width += pt.m_x - ( m_x + m_width ); m_height += pt.m_y - (m_y+m_height);}
 572     inline void MoveRightBottomTo( const wxPoint2DDouble &pt )
 573         { m_x = pt.m_x - m_width; m_y = pt.m_y - m_height; }
 574     inline wxPoint2DDouble GetCentre() const
 575         { return wxPoint2DDouble( m_x+m_width/2 , m_y+m_height/2 ); }
 576     inline void SetCentre( const wxPoint2DDouble &pt )
 577         { MoveCentreTo( pt ); }    // since this is impossible without moving...
 578     inline void MoveCentreTo( const wxPoint2DDouble &pt )
 579         { m_x += pt.m_x - (m_x+m_width/2) , m_y += pt.m_y -(m_y+m_height/2); }
 580     inline wxOutCode GetOutCode( const wxPoint2DDouble &pt ) const
 581         { return (wxOutCode) (( ( pt.m_x < m_x ) ? wxOutLeft : 0 ) +
 582                      ( ( pt.m_x > m_x + m_width ) ? wxOutRight : 0 ) +
 583                      ( ( pt.m_y < m_y ) ? wxOutTop : 0 )  +
 584                      ( ( pt.m_y > m_y + m_height ) ? wxOutBottom : 0 )); }
 585     inline wxOutCode GetOutcode(const wxPoint2DDouble &pt) const
 586         { return GetOutCode(pt) ; }
 587     inline bool Contains( const wxPoint2DDouble &pt ) const
 588         { return  GetOutCode( pt ) == wxInside; }
 589     inline bool Contains( const wxRect2DDouble &rect ) const
 590         { return ( ( ( m_x <= rect.m_x ) && ( rect.m_x + rect.m_width <= m_x + m_width ) ) &&
 591                 ( ( m_y <= rect.m_y ) && ( rect.m_y + rect.m_height <= m_y + m_height ) ) ); }
 592     inline bool IsEmpty() const
 593         { return m_width <= 0 || m_height <= 0; }
 594     inline bool HaveEqualSize( const wxRect2DDouble &rect ) const
 595         { return wxIsSameDouble(rect.m_width, m_width) && wxIsSameDouble(rect.m_height, m_height); }
 596
 597     inline void Inset( wxDouble x , wxDouble y )
 598         { m_x += x; m_y += y; m_width -= 2 * x; m_height -= 2 * y; }
 599     inline void Inset( wxDouble left , wxDouble top ,wxDouble right , wxDouble bottom  )
 600         { m_x += left; m_y += top; m_width -= left + right; m_height -= top + bottom;}
 601     inline void Offset( const wxPoint2DDouble &pt )
 602         { m_x += pt.m_x; m_y += pt.m_y; }
 603
 604     void ConstrainTo( const wxRect2DDouble &rect );
 605
 606     inline wxPoint2DDouble Interpolate( wxInt32 widthfactor , wxInt32 heightfactor )
 607         { return wxPoint2DDouble( m_x + m_width * widthfactor , m_y + m_height * heightfactor ); }
 608
 609     static void Intersect( const wxRect2DDouble &src1 , const wxRect2DDouble &src2 , wxRect2DDouble *dest );
 610     inline void Intersect( const wxRect2DDouble &otherRect )
 611         { Intersect( *this , otherRect , this ); }
 612     inline wxRect2DDouble CreateIntersection( const wxRect2DDouble &otherRect ) const
 613         { wxRect2DDouble result; Intersect( *this , otherRect , &result); return result; }
 614     bool Intersects( const wxRect2DDouble &rect ) const;
 615
 616     static void Union( const wxRect2DDouble &src1 , const wxRect2DDouble &src2 , wxRect2DDouble *dest );
 617     void Union( const wxRect2DDouble &otherRect )
 618         { Union( *this , otherRect , this ); }
 619     void Union( const wxPoint2DDouble &pt );
 620     inline wxRect2DDouble CreateUnion( const wxRect2DDouble &otherRect ) const
 621         { wxRect2DDouble result; Union( *this , otherRect , &result); return result; }
 622
 623     inline void Scale( wxDouble f )
 624         { m_x *= f; m_y *= f; m_width *= f; m_height *= f;}
 625     inline void Scale( wxInt32 num , wxInt32 denum )
 626         { m_x *= ((wxDouble)num)/((wxDouble)denum); m_y *= ((wxDouble)num)/((wxDouble)denum);
 627                 m_width *= ((wxDouble)num)/((wxDouble)denum); m_height *= ((wxDouble)num)/((wxDouble)denum);}
 628
 629     wxRect2DDouble& operator = (const wxRect2DDouble& rect);
 630     inline bool operator == (const wxRect2DDouble& rect) const
 631         { return wxIsSameDouble(m_x, rect.m_x) && wxIsSameDouble(m_y, rect.m_y) && HaveEqualSize(rect); }
 632     inline bool operator != (const wxRect2DDouble& rect) const
 633         { return !(*this == rect); }
 634
 635     wxDouble  m_x;
 636     wxDouble  m_y;
 637     wxDouble  m_width;
 638     wxDouble m_height;
 639 };
 640
 641
 642 // wxRect2Ds are a axis-aligned rectangles, each side of the rect is parallel to the x- or m_y- axis. The rectangle is either defined by the
 643 // top left and bottom right corner, or by the top left corner and size. A point is contained within the rectangle if
 644 // left <= x < right  and top <= m_y < bottom , thus it is a half open interval.
 645
 646 class WXDLLIMPEXP_CORE wxRect2DInt
 647 {
 648 public:
 649        wxRect2DInt() { m_x = m_y = m_width = m_height = 0; }
 650        wxRect2DInt( const wxRect& r ) { m_x = r.x ; m_y = r.y ; m_width = r.width ; m_height = r.height ; }
 651        wxRect2DInt(wxInt32 x, wxInt32 y, wxInt32 w, wxInt32 h) { m_x = x; m_y = y; m_width = w;  m_height = h; }
 652        wxRect2DInt(const wxPoint2DInt& topLeft, const wxPoint2DInt& bottomRight);
 653        inline wxRect2DInt(const wxPoint2DInt& pos, const wxSize& size);
 654        inline wxRect2DInt(const wxRect2DInt& rect);
 655
 656         // single attribute accessors
 657
 658       inline wxPoint2DInt GetPosition() { return wxPoint2DInt(m_x, m_y); }
 659        inline wxSize GetSize() { return wxSize(m_width, m_height); }
 660
 661         // for the edge and corner accessors there are two setters counterparts, the Set.. functions keep the other corners at their
 662         // position whenever sensible, the Move.. functions keep the size of the rect and move the other corners appropriately
 663
 664       inline wxInt32 GetLeft() const { return m_x; }
 665        inline void SetLeft( wxInt32 n ) { m_width += m_x - n; m_x = n; }
 666        inline void MoveLeftTo( wxInt32 n ) { m_x = n; }
 667        inline wxInt32 GetTop() const { return m_y; }
 668        inline void SetTop( wxInt32 n ) { m_height += m_y - n; m_y = n; }
 669        inline void MoveTopTo( wxInt32 n ) { m_y = n; }
 670        inline wxInt32 GetBottom() const { return m_y + m_height; }
 671        inline void SetBottom( wxInt32 n ) { m_height += n - (m_y+m_height);}
 672        inline void MoveBottomTo( wxInt32 n ) { m_y = n - m_height; }
 673        inline wxInt32 GetRight() const { return m_x + m_width; }
 674        inline void SetRight( wxInt32 n ) { m_width += n - (m_x+m_width) ; }
 675        inline void MoveRightTo( wxInt32 n ) { m_x = n - m_width; }
 676
 677         inline wxPoint2DInt GetLeftTop() const { return wxPoint2DInt( m_x , m_y ); }
 678         inline void SetLeftTop( const wxPoint2DInt &pt ) { m_width += m_x - pt.m_x; m_height += m_y - pt.m_y; m_x = pt.m_x; m_y = pt.m_y; }
 679         inline void MoveLeftTopTo( const wxPoint2DInt &pt ) { m_x = pt.m_x; m_y = pt.m_y; }
 680         inline wxPoint2DInt GetLeftBottom() const { return wxPoint2DInt( m_x , m_y + m_height ); }
 681         inline void SetLeftBottom( const wxPoint2DInt &pt ) { m_width += m_x - pt.m_x; m_height += pt.m_y - (m_y+m_height) ; m_x = pt.m_x; }
 682         inline void MoveLeftBottomTo( const wxPoint2DInt &pt ) { m_x = pt.m_x; m_y = pt.m_y - m_height; }
 683         inline wxPoint2DInt GetRightTop() const { return wxPoint2DInt( m_x+m_width , m_y ); }
 684         inline void SetRightTop( const wxPoint2DInt &pt ) { m_width += pt.m_x - ( m_x + m_width ); m_height += m_y - pt.m_y; m_y = pt.m_y; }
 685         inline void MoveRightTopTo( const wxPoint2DInt &pt ) { m_x = pt.m_x - m_width; m_y = pt.m_y; }
 686         inline wxPoint2DInt GetRightBottom() const { return wxPoint2DInt( m_x+m_width , m_y + m_height ); }
 687         inline void SetRightBottom( const wxPoint2DInt &pt ) { m_width += pt.m_x - ( m_x + m_width ); m_height += pt.m_y - (m_y+m_height);}
 688         inline void MoveRightBottomTo( const wxPoint2DInt &pt ) { m_x = pt.m_x - m_width; m_y = pt.m_y - m_height; }
 689         inline wxPoint2DInt GetCentre() const { return wxPoint2DInt( m_x+m_width/2 , m_y+m_height/2 ); }
 690         inline void SetCentre( const wxPoint2DInt &pt ) { MoveCentreTo( pt ); }    // since this is impossible without moving...
 691         inline void MoveCentreTo( const wxPoint2DInt &pt ) { m_x += pt.m_x - (m_x+m_width/2) , m_y += pt.m_y -(m_y+m_height/2); }
 692         inline wxOutCode GetOutCode( const wxPoint2DInt &pt ) const
 693             { return (wxOutCode) (( ( pt.m_x < m_x ) ? wxOutLeft : 0 ) +
 694                      ( ( pt.m_x >= m_x + m_width ) ? wxOutRight : 0 ) +
 695                      ( ( pt.m_y < m_y ) ? wxOutTop : 0 )  +
 696                      ( ( pt.m_y >= m_y + m_height ) ? wxOutBottom : 0 )); }
 697         inline wxOutCode GetOutcode( const wxPoint2DInt &pt ) const
 698             { return GetOutCode( pt ) ; }
 699         inline bool Contains( const wxPoint2DInt &pt ) const
 700             { return  GetOutCode( pt ) == wxInside; }
 701         inline bool Contains( const wxRect2DInt &rect ) const
 702             { return ( ( ( m_x <= rect.m_x ) && ( rect.m_x + rect.m_width <= m_x + m_width ) ) &&
 703                 ( ( m_y <= rect.m_y ) && ( rect.m_y + rect.m_height <= m_y + m_height ) ) ); }
 704         inline bool IsEmpty() const
 705             { return ( m_width <= 0 || m_height <= 0 ); }
 706         inline bool HaveEqualSize( const wxRect2DInt &rect ) const
 707             { return ( rect.m_width == m_width && rect.m_height == m_height ); }
 708
 709         inline void Inset( wxInt32 x , wxInt32 y ) { m_x += x; m_y += y; m_width -= 2 * x; m_height -= 2 * y; }
 710         inline void Inset( wxInt32 left , wxInt32 top ,wxInt32 right , wxInt32 bottom  )
 711             { m_x += left; m_y += top; m_width -= left + right; m_height -= top + bottom;}
 712         inline void Offset( const wxPoint2DInt &pt ) { m_x += pt.m_x; m_y += pt.m_y; }
 713         void ConstrainTo( const wxRect2DInt &rect );
 714         inline wxPoint2DInt Interpolate( wxInt32 widthfactor , wxInt32 heightfactor ) { return wxPoint2DInt( m_x + m_width * widthfactor , m_y + m_height * heightfactor ); }
 715
 716         static void Intersect( const wxRect2DInt &src1 , const wxRect2DInt &src2 , wxRect2DInt *dest );
 717         inline void Intersect( const wxRect2DInt &otherRect ) { Intersect( *this , otherRect , this ); }
 718         inline wxRect2DInt CreateIntersection( const wxRect2DInt &otherRect ) const { wxRect2DInt result; Intersect( *this , otherRect , &result); return result; }
 719         bool Intersects( const wxRect2DInt &rect ) const;
 720
 721         static void Union( const wxRect2DInt &src1 , const wxRect2DInt &src2 , wxRect2DInt *dest );
 722         void Union( const wxRect2DInt &otherRect )  { Union( *this , otherRect , this ); }
 723         void Union( const wxPoint2DInt &pt );
 724         inline wxRect2DInt CreateUnion( const wxRect2DInt &otherRect ) const { wxRect2DInt result; Union( *this , otherRect , &result); return result; }
 725
 726         inline void Scale( wxInt32 f ) { m_x *= f; m_y *= f; m_width *= f; m_height *= f;}
 727         inline void Scale( wxInt32 num , wxInt32 denum )
 728             { m_x *= ((wxInt32)num)/((wxInt32)denum); m_y *= ((wxInt32)num)/((wxInt32)denum);
 729                 m_width *= ((wxInt32)num)/((wxInt32)denum); m_height *= ((wxInt32)num)/((wxInt32)denum);}
 730
 731        wxRect2DInt& operator = (const wxRect2DInt& rect);
 732        bool operator == (const wxRect2DInt& rect) const;
 733        bool operator != (const wxRect2DInt& rect) const;
 734
 735 #if wxUSE_STREAMS
 736        void WriteTo( wxDataOutputStream &stream ) const;
 737        void ReadFrom( wxDataInputStream &stream );
 738 #endif // wxUSE_STREAMS
 739
 740        wxInt32 m_x;
 741        wxInt32 m_y;
 742        wxInt32 m_width;
 743        wxInt32 m_height;
 744 };
 745
 746 inline wxRect2DInt::wxRect2DInt( const wxRect2DInt &r )
 747 {
 748     m_x = r.m_x;
 749     m_y = r.m_y;
 750     m_width = r.m_width;
 751     m_height = r.m_height;
 752 }
 753
 754 inline wxRect2DInt::wxRect2DInt( const wxPoint2DInt &a , const wxPoint2DInt &b)
 755 {
 756     m_x = wxMin( a.m_x , b.m_x );
 757     m_y = wxMin( a.m_y , b.m_y );
 758     m_width = abs( a.m_x - b.m_x );
 759     m_height = abs( a.m_y - b.m_y );
 760 }
 761
 762 inline wxRect2DInt::wxRect2DInt( const wxPoint2DInt& pos, const wxSize& size)
 763 {
 764     m_x = pos.m_x;
 765     m_y = pos.m_y;
 766     m_width = size.x;
 767     m_height = size.y;
 768 }
 769
 770 inline bool wxRect2DInt::operator == (const wxRect2DInt& rect) const
 771 {
 772     return (m_x==rect.m_x && m_y==rect.m_y &&
 773             m_width==rect.m_width && m_height==rect.m_height);
 774 }
 775
 776 inline bool wxRect2DInt::operator != (const wxRect2DInt& rect) const
 777 {
 778     return !(*this == rect);
 779 }
 780
 781 class wxTransform2D
 782 {
 783 public :
 784     virtual ~wxTransform2D() { }
 785     virtual void                    Transform( wxPoint2DInt* pt )const  = 0;
 786     virtual void                    Transform( wxRect2DInt* r ) const;
 787     virtual wxPoint2DInt    Transform( const wxPoint2DInt &pt ) const;
 788     virtual wxRect2DInt        Transform( const wxRect2DInt &r ) const ;
 789
 790     virtual void                    InverseTransform( wxPoint2DInt* pt ) const  = 0;
 791     virtual void                    InverseTransform( wxRect2DInt* r ) const ;
 792     virtual wxPoint2DInt    InverseTransform( const wxPoint2DInt &pt ) const ;
 793     virtual wxRect2DInt        InverseTransform( const wxRect2DInt &r ) const ;
 794 };
 795
 796 inline void    wxTransform2D::Transform( wxRect2DInt* r ) const
 797     { wxPoint2DInt a = r->GetLeftTop() , b = r->GetRightBottom(); Transform( &a ); Transform( &b ); *r = wxRect2DInt( a , b ); }
 798
 799 inline wxPoint2DInt    wxTransform2D::Transform( const wxPoint2DInt &pt ) const
 800     { wxPoint2DInt res = pt; Transform( &res ); return res; }
 801
 802 inline wxRect2DInt     wxTransform2D::Transform( const wxRect2DInt &r ) const
 803     { wxRect2DInt res = r; Transform( &res ); return res; }
 804
 805 inline void    wxTransform2D::InverseTransform( wxRect2DInt* r ) const
 806     { wxPoint2DInt a = r->GetLeftTop() , b = r->GetRightBottom(); InverseTransform( &a ); InverseTransform( &b ); *r = wxRect2DInt( a , b ); }
 807
 808 inline wxPoint2DInt    wxTransform2D::InverseTransform( const wxPoint2DInt &pt ) const
 809     { wxPoint2DInt res = pt; InverseTransform( &res ); return res; }
 810
 811 inline wxRect2DInt     wxTransform2D::InverseTransform( const wxRect2DInt &r ) const
 812     { wxRect2DInt res = r; InverseTransform( &res ); return res; }
 813
 814
 815 #endif // wxUSE_GEOMETRY
 816
 817 #endif // _WX_GEOMETRY_H_