| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: dcclient.cpp |
| 3 | // Purpose: wxClientDC class |
| 4 | // Author: AUTHOR |
| 5 | // Modified by: |
| 6 | // Created: 01/02/97 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) AUTHOR |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifdef __GNUG__ |
| 13 | #pragma implementation "dcclient.h" |
| 14 | #endif |
| 15 | |
| 16 | #include "wx/dcclient.h" |
| 17 | #include "wx/dcmemory.h" |
| 18 | #include "wx/region.h" |
| 19 | #include <math.h> |
| 20 | |
| 21 | //----------------------------------------------------------------------------- |
| 22 | // constants |
| 23 | //----------------------------------------------------------------------------- |
| 24 | |
| 25 | #define RAD2DEG 57.2957795131 |
| 26 | |
| 27 | //----------------------------------------------------------------------------- |
| 28 | // wxPaintDC |
| 29 | //----------------------------------------------------------------------------- |
| 30 | |
| 31 | #if !USE_SHARED_LIBRARY |
| 32 | IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC) |
| 33 | IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC) |
| 34 | IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC) |
| 35 | #endif |
| 36 | |
| 37 | /* |
| 38 | * wxWindowDC |
| 39 | */ |
| 40 | |
| 41 | wxWindowDC::wxWindowDC(void) |
| 42 | { |
| 43 | }; |
| 44 | |
| 45 | wxWindowDC::wxWindowDC( wxWindow *window ) |
| 46 | { |
| 47 | }; |
| 48 | |
| 49 | wxWindowDC::~wxWindowDC(void) |
| 50 | { |
| 51 | }; |
| 52 | |
| 53 | void wxWindowDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1), |
| 54 | const wxColour& WXUNUSED(col), int WXUNUSED(style) ) |
| 55 | { |
| 56 | }; |
| 57 | |
| 58 | bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const |
| 59 | { |
| 60 | return FALSE; |
| 61 | }; |
| 62 | |
| 63 | void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 ) |
| 64 | { |
| 65 | if (!Ok()) return; |
| 66 | |
| 67 | }; |
| 68 | |
| 69 | void wxWindowDC::CrossHair( long x, long y ) |
| 70 | { |
| 71 | if (!Ok()) return; |
| 72 | |
| 73 | }; |
| 74 | |
| 75 | void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, long xc, long yc ) |
| 76 | { |
| 77 | if (!Ok()) return; |
| 78 | |
| 79 | long xx1 = XLOG2DEV(x1); |
| 80 | long yy1 = YLOG2DEV(y1); |
| 81 | long xx2 = XLOG2DEV(x2); |
| 82 | long yy2 = YLOG2DEV(y2); |
| 83 | long xxc = XLOG2DEV((long)xc); |
| 84 | long yyc = YLOG2DEV((long)yc); |
| 85 | double dx = xx1 - xxc; |
| 86 | double dy = yy1 - yyc; |
| 87 | double radius = sqrt(dx*dx+dy*dy); |
| 88 | long r = (long)radius; |
| 89 | double radius1, radius2; |
| 90 | |
| 91 | if (xx1 == xx2 && yy1 == yy2) |
| 92 | { |
| 93 | radius1 = 0.0; |
| 94 | radius2 = 360.0; |
| 95 | } |
| 96 | else |
| 97 | if (radius == 0.0) |
| 98 | { |
| 99 | radius1 = radius2 = 0.0; |
| 100 | } |
| 101 | else |
| 102 | { |
| 103 | radius1 = (xx1 - xxc == 0) ? |
| 104 | (yy1 - yyc < 0) ? 90.0 : -90.0 : |
| 105 | -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG; |
| 106 | radius2 = (xx2 - xxc == 0) ? |
| 107 | (yy2 - yyc < 0) ? 90.0 : -90.0 : |
| 108 | -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG; |
| 109 | }; |
| 110 | long alpha1 = long(radius1 * 64.0); |
| 111 | long alpha2 = long((radius2 - radius1) * 64.0); |
| 112 | while (alpha2 <= 0) alpha2 += 360*64; |
| 113 | while (alpha1 > 360*64) alpha1 -= 360*64; |
| 114 | |
| 115 | if (m_brush.GetStyle() != wxTRANSPARENT) {}; |
| 116 | |
| 117 | if (m_pen.GetStyle() != wxTRANSPARENT) {}; |
| 118 | |
| 119 | }; |
| 120 | |
| 121 | void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea ) |
| 122 | { |
| 123 | if (!Ok()) return; |
| 124 | |
| 125 | long xx = XLOG2DEV(x); |
| 126 | long yy = YLOG2DEV(y); |
| 127 | long ww = m_signX * XLOG2DEVREL(width); |
| 128 | long hh = m_signY * YLOG2DEVREL(height); |
| 129 | |
| 130 | // CMB: handle -ve width and/or height |
| 131 | if (ww < 0) { ww = -ww; xx = xx - ww; } |
| 132 | if (hh < 0) { hh = -hh; yy = yy - hh; } |
| 133 | |
| 134 | long start = long(sa * 64.0); |
| 135 | long end = long(ea * 64.0); |
| 136 | if (m_brush.GetStyle() != wxTRANSPARENT) {}; |
| 137 | |
| 138 | if (m_pen.GetStyle() != wxTRANSPARENT) {}; |
| 139 | }; |
| 140 | |
| 141 | void wxWindowDC::DrawPoint( long x, long y ) |
| 142 | { |
| 143 | if (!Ok()) return; |
| 144 | |
| 145 | if (m_pen.GetStyle() != wxTRANSPARENT) {}; |
| 146 | }; |
| 147 | |
| 148 | void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset ) |
| 149 | { |
| 150 | if (!Ok()) return; |
| 151 | |
| 152 | if (m_pen.GetStyle() == wxTRANSPARENT) return; |
| 153 | |
| 154 | for (int i = 0; i < n-1; i++) |
| 155 | { |
| 156 | long x1 = XLOG2DEV(points[i].x + xoffset); |
| 157 | long x2 = XLOG2DEV(points[i+1].x + xoffset); |
| 158 | long y1 = YLOG2DEV(points[i].y + yoffset); // oh, what a waste |
| 159 | long y2 = YLOG2DEV(points[i+1].y + yoffset); |
| 160 | }; |
| 161 | }; |
| 162 | |
| 163 | void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset ) |
| 164 | { |
| 165 | if (!Ok()) return; |
| 166 | |
| 167 | if (m_pen.GetStyle() == wxTRANSPARENT) return; |
| 168 | |
| 169 | wxNode *node = points->First(); |
| 170 | while (node->Next()) |
| 171 | { |
| 172 | wxPoint *point = (wxPoint*)node->Data(); |
| 173 | wxPoint *npoint = (wxPoint*)node->Next()->Data(); |
| 174 | long x1 = XLOG2DEV(point->x + xoffset); |
| 175 | long x2 = XLOG2DEV(npoint->x + xoffset); |
| 176 | long y1 = YLOG2DEV(point->y + yoffset); // and again... |
| 177 | long y2 = YLOG2DEV(npoint->y + yoffset); |
| 178 | node = node->Next(); |
| 179 | }; |
| 180 | }; |
| 181 | |
| 182 | void wxWindowDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[], |
| 183 | long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) ) |
| 184 | { |
| 185 | if (!Ok()) return; |
| 186 | }; |
| 187 | |
| 188 | void wxWindowDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset), |
| 189 | long WXUNUSED(yoffset), int WXUNUSED(fillStyle) ) |
| 190 | { |
| 191 | if (!Ok()) return; |
| 192 | }; |
| 193 | |
| 194 | void wxWindowDC::DrawRectangle( long x, long y, long width, long height ) |
| 195 | { |
| 196 | if (!Ok()) return; |
| 197 | |
| 198 | long xx = XLOG2DEV(x); |
| 199 | long yy = YLOG2DEV(y); |
| 200 | long ww = m_signX * XLOG2DEVREL(width); |
| 201 | long hh = m_signY * YLOG2DEVREL(height); |
| 202 | |
| 203 | // CMB: draw nothing if transformed w or h is 0 |
| 204 | if (ww == 0 || hh == 0) return; |
| 205 | |
| 206 | // CMB: handle -ve width and/or height |
| 207 | if (ww < 0) { ww = -ww; xx = xx - ww; } |
| 208 | if (hh < 0) { hh = -hh; yy = yy - hh; } |
| 209 | |
| 210 | if (m_brush.GetStyle() != wxTRANSPARENT) {}; |
| 211 | |
| 212 | if (m_pen.GetStyle() != wxTRANSPARENT) {}; |
| 213 | }; |
| 214 | |
| 215 | void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius ) |
| 216 | { |
| 217 | if (!Ok()) return; |
| 218 | |
| 219 | if (radius < 0.0) radius = - radius * ((width < height) ? width : height); |
| 220 | |
| 221 | long xx = XLOG2DEV(x); |
| 222 | long yy = YLOG2DEV(y); |
| 223 | long ww = m_signX * XLOG2DEVREL(width); |
| 224 | long hh = m_signY * YLOG2DEVREL(height); |
| 225 | long rr = XLOG2DEVREL((long)radius); |
| 226 | |
| 227 | // CMB: handle -ve width and/or height |
| 228 | if (ww < 0) { ww = -ww; xx = xx - ww; } |
| 229 | if (hh < 0) { hh = -hh; yy = yy - hh; } |
| 230 | |
| 231 | // CMB: if radius is zero use DrawRectangle() instead to avoid |
| 232 | // X drawing errors with small radii |
| 233 | if (rr == 0) |
| 234 | { |
| 235 | DrawRectangle( x, y, width, height ); |
| 236 | return; |
| 237 | } |
| 238 | |
| 239 | // CMB: draw nothing if transformed w or h is 0 |
| 240 | if (ww == 0 || hh == 0) return; |
| 241 | |
| 242 | // CMB: adjust size if outline is drawn otherwise the result is |
| 243 | // 1 pixel too wide and high |
| 244 | if (m_pen.GetStyle() != wxTRANSPARENT) |
| 245 | { |
| 246 | ww--; |
| 247 | hh--; |
| 248 | } |
| 249 | |
| 250 | // CMB: ensure dd is not larger than rectangle otherwise we |
| 251 | // get an hour glass shape |
| 252 | long dd = 2 * rr; |
| 253 | if (dd > ww) dd = ww; |
| 254 | if (dd > hh) dd = hh; |
| 255 | rr = dd / 2; |
| 256 | |
| 257 | if (m_brush.GetStyle() != wxTRANSPARENT) |
| 258 | { |
| 259 | }; |
| 260 | |
| 261 | if (m_pen.GetStyle() != wxTRANSPARENT) |
| 262 | { |
| 263 | }; |
| 264 | }; |
| 265 | |
| 266 | void wxWindowDC::DrawEllipse( long x, long y, long width, long height ) |
| 267 | { |
| 268 | if (!Ok()) return; |
| 269 | |
| 270 | long xx = XLOG2DEV(x); |
| 271 | long yy = YLOG2DEV(y); |
| 272 | long ww = m_signX * XLOG2DEVREL(width); |
| 273 | long hh = m_signY * YLOG2DEVREL(height); |
| 274 | |
| 275 | // CMB: handle -ve width and/or height |
| 276 | if (ww < 0) { ww = -ww; xx = xx - ww; } |
| 277 | if (hh < 0) { hh = -hh; yy = yy - hh; } |
| 278 | |
| 279 | if (m_brush.GetStyle() != wxTRANSPARENT) {}; |
| 280 | |
| 281 | if (m_pen.GetStyle() != wxTRANSPARENT) {}; |
| 282 | }; |
| 283 | |
| 284 | bool wxWindowDC::CanDrawBitmap(void) const |
| 285 | { |
| 286 | return TRUE; |
| 287 | }; |
| 288 | |
| 289 | void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask ) |
| 290 | { |
| 291 | if (!Ok()) return; |
| 292 | |
| 293 | if (!icon.Ok()) return; |
| 294 | |
| 295 | int xx = XLOG2DEV(x); |
| 296 | int yy = YLOG2DEV(y); |
| 297 | |
| 298 | }; |
| 299 | |
| 300 | bool wxWindowDC::Blit( long xdest, long ydest, long width, long height, |
| 301 | wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) ) |
| 302 | { |
| 303 | if (!Ok()) return FALSE; |
| 304 | |
| 305 | // CMB 20/5/98: add blitting of bitmaps |
| 306 | if (source->IsKindOf(CLASSINFO(wxMemoryDC))) |
| 307 | { |
| 308 | wxMemoryDC* srcDC = (wxMemoryDC*)source; |
| 309 | /* |
| 310 | GdkBitmap* bmap = srcDC->m_selected.GetBitmap(); |
| 311 | if (bmap) |
| 312 | { |
| 313 | gdk_draw_bitmap ( |
| 314 | m_window, |
| 315 | m_textGC, |
| 316 | bmap, |
| 317 | source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc), |
| 318 | XLOG2DEV(xdest), YLOG2DEV(ydest), |
| 319 | source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height) |
| 320 | ); |
| 321 | return TRUE; |
| 322 | } |
| 323 | */ |
| 324 | } |
| 325 | |
| 326 | return TRUE; |
| 327 | }; |
| 328 | |
| 329 | void wxWindowDC::DrawText( const wxString &text, long x, long y, bool |
| 330 | WXUNUSED(use16) ) |
| 331 | { |
| 332 | if (!Ok()) return; |
| 333 | |
| 334 | }; |
| 335 | |
| 336 | |
| 337 | |
| 338 | bool wxWindowDC::CanGetTextExtent(void) const |
| 339 | { |
| 340 | return TRUE; |
| 341 | }; |
| 342 | |
| 343 | void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height, |
| 344 | long *WXUNUSED(descent), long *WXUNUSED(externalLeading), |
| 345 | wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) ) |
| 346 | { |
| 347 | if (!Ok()) return; |
| 348 | |
| 349 | }; |
| 350 | |
| 351 | long wxWindowDC::GetCharWidth(void) |
| 352 | { |
| 353 | if (!Ok()) return 0; |
| 354 | return 0; |
| 355 | }; |
| 356 | |
| 357 | long wxWindowDC::GetCharHeight(void) |
| 358 | { |
| 359 | if (!Ok()) return 0; |
| 360 | return 0; |
| 361 | }; |
| 362 | |
| 363 | void wxWindowDC::Clear(void) |
| 364 | { |
| 365 | if (!Ok()) return; |
| 366 | |
| 367 | }; |
| 368 | |
| 369 | void wxWindowDC::SetFont( const wxFont &font ) |
| 370 | { |
| 371 | if (!Ok()) return; |
| 372 | |
| 373 | m_font = font; |
| 374 | }; |
| 375 | |
| 376 | void wxWindowDC::SetPen( const wxPen &pen ) |
| 377 | { |
| 378 | if (!Ok()) return; |
| 379 | |
| 380 | if (m_pen == pen) return; |
| 381 | |
| 382 | m_pen = pen; |
| 383 | |
| 384 | if (!m_pen.Ok()) return; |
| 385 | }; |
| 386 | |
| 387 | void wxWindowDC::SetBrush( const wxBrush &brush ) |
| 388 | { |
| 389 | if (!Ok()) return; |
| 390 | |
| 391 | if (m_brush == brush) return; |
| 392 | |
| 393 | m_brush = brush; |
| 394 | |
| 395 | if (!m_brush.Ok()) return; |
| 396 | |
| 397 | }; |
| 398 | |
| 399 | void wxWindowDC::SetBackground( const wxBrush &brush ) |
| 400 | { |
| 401 | if (!Ok()) return; |
| 402 | |
| 403 | if (m_backgroundBrush == brush) return; |
| 404 | |
| 405 | m_backgroundBrush = brush; |
| 406 | |
| 407 | if (!m_backgroundBrush.Ok()) return; |
| 408 | |
| 409 | }; |
| 410 | |
| 411 | void wxWindowDC::SetLogicalFunction( int function ) |
| 412 | { |
| 413 | if (m_logicalFunction == function) return; |
| 414 | }; |
| 415 | |
| 416 | void wxWindowDC::SetTextForeground( const wxColour &col ) |
| 417 | { |
| 418 | if (!Ok()) return; |
| 419 | |
| 420 | if (m_textForegroundColour == col) return; |
| 421 | |
| 422 | m_textForegroundColour = col; |
| 423 | if (!m_textForegroundColour.Ok()) return; |
| 424 | }; |
| 425 | |
| 426 | void wxWindowDC::SetTextBackground( const wxColour &col ) |
| 427 | { |
| 428 | if (!Ok()) return; |
| 429 | |
| 430 | if (m_textBackgroundColour == col) return; |
| 431 | |
| 432 | m_textBackgroundColour = col; |
| 433 | if (!m_textBackgroundColour.Ok()) return; |
| 434 | }; |
| 435 | |
| 436 | void wxWindowDC::SetBackgroundMode( int mode ) |
| 437 | { |
| 438 | m_backgroundMode = mode; |
| 439 | |
| 440 | if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT) |
| 441 | { |
| 442 | } |
| 443 | }; |
| 444 | |
| 445 | void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) ) |
| 446 | { |
| 447 | }; |
| 448 | |
| 449 | void wxWindowDC::SetClippingRegion( long x, long y, long width, long height ) |
| 450 | { |
| 451 | wxDC::SetClippingRegion( x, y, width, height ); |
| 452 | |
| 453 | // TODO |
| 454 | |
| 455 | }; |
| 456 | |
| 457 | void wxWindowDC::SetClippingRegion( const wxRegion& region ) |
| 458 | { |
| 459 | wxRect box = region.GetBox(); |
| 460 | |
| 461 | wxDC::SetClippingRegion( box.x, box.y, box.width, box.height ); |
| 462 | |
| 463 | // TODO |
| 464 | } |
| 465 | |
| 466 | void wxWindowDC::DestroyClippingRegion(void) |
| 467 | { |
| 468 | wxDC::DestroyClippingRegion(); |
| 469 | |
| 470 | }; |
| 471 | |
| 472 | // ----------------------------------- spline code ---------------------------------------- |
| 473 | |
| 474 | void wx_quadratic_spline(double a1, double b1, double a2, double b2, |
| 475 | double a3, double b3, double a4, double b4); |
| 476 | void wx_clear_stack(void); |
| 477 | int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3, |
| 478 | double *y3, double *x4, double *y4); |
| 479 | void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, |
| 480 | double x4, double y4); |
| 481 | static bool wx_spline_add_point(double x, double y); |
| 482 | static void wx_spline_draw_point_array(wxDC *dc); |
| 483 | |
| 484 | wxList wx_spline_point_list; |
| 485 | |
| 486 | #define half(z1, z2) ((z1+z2)/2.0) |
| 487 | #define THRESHOLD 5 |
| 488 | |
| 489 | /* iterative version */ |
| 490 | |
| 491 | void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4, |
| 492 | double b4) |
| 493 | { |
| 494 | register double xmid, ymid; |
| 495 | double x1, y1, x2, y2, x3, y3, x4, y4; |
| 496 | |
| 497 | wx_clear_stack(); |
| 498 | wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4); |
| 499 | |
| 500 | while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) { |
| 501 | xmid = (double)half(x2, x3); |
| 502 | ymid = (double)half(y2, y3); |
| 503 | if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD && |
| 504 | fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) { |
| 505 | wx_spline_add_point( x1, y1 ); |
| 506 | wx_spline_add_point( xmid, ymid ); |
| 507 | } else { |
| 508 | wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3), |
| 509 | (double)half(x3, x4), (double)half(y3, y4), x4, y4); |
| 510 | wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2), |
| 511 | (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid); |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | /* utilities used by spline drawing routines */ |
| 517 | |
| 518 | typedef struct wx_spline_stack_struct { |
| 519 | double x1, y1, x2, y2, x3, y3, x4, y4; |
| 520 | } Stack; |
| 521 | |
| 522 | #define SPLINE_STACK_DEPTH 20 |
| 523 | static Stack wx_spline_stack[SPLINE_STACK_DEPTH]; |
| 524 | static Stack *wx_stack_top; |
| 525 | static int wx_stack_count; |
| 526 | |
| 527 | void wx_clear_stack(void) |
| 528 | { |
| 529 | wx_stack_top = wx_spline_stack; |
| 530 | wx_stack_count = 0; |
| 531 | } |
| 532 | |
| 533 | void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) |
| 534 | { |
| 535 | wx_stack_top->x1 = x1; |
| 536 | wx_stack_top->y1 = y1; |
| 537 | wx_stack_top->x2 = x2; |
| 538 | wx_stack_top->y2 = y2; |
| 539 | wx_stack_top->x3 = x3; |
| 540 | wx_stack_top->y3 = y3; |
| 541 | wx_stack_top->x4 = x4; |
| 542 | wx_stack_top->y4 = y4; |
| 543 | wx_stack_top++; |
| 544 | wx_stack_count++; |
| 545 | } |
| 546 | |
| 547 | int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, |
| 548 | double *x3, double *y3, double *x4, double *y4) |
| 549 | { |
| 550 | if (wx_stack_count == 0) |
| 551 | return (0); |
| 552 | wx_stack_top--; |
| 553 | wx_stack_count--; |
| 554 | *x1 = wx_stack_top->x1; |
| 555 | *y1 = wx_stack_top->y1; |
| 556 | *x2 = wx_stack_top->x2; |
| 557 | *y2 = wx_stack_top->y2; |
| 558 | *x3 = wx_stack_top->x3; |
| 559 | *y3 = wx_stack_top->y3; |
| 560 | *x4 = wx_stack_top->x4; |
| 561 | *y4 = wx_stack_top->y4; |
| 562 | return (1); |
| 563 | } |
| 564 | |
| 565 | static bool wx_spline_add_point(double x, double y) |
| 566 | { |
| 567 | wxPoint *point = new wxPoint ; |
| 568 | point->x = (int) x; |
| 569 | point->y = (int) y; |
| 570 | wx_spline_point_list.Append((wxObject*)point); |
| 571 | return TRUE; |
| 572 | } |
| 573 | |
| 574 | static void wx_spline_draw_point_array(wxDC *dc) |
| 575 | { |
| 576 | dc->DrawLines(&wx_spline_point_list, 0, 0 ); |
| 577 | wxNode *node = wx_spline_point_list.First(); |
| 578 | while (node) |
| 579 | { |
| 580 | wxPoint *point = (wxPoint *)node->Data(); |
| 581 | delete point; |
| 582 | delete node; |
| 583 | node = wx_spline_point_list.First(); |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | void wxWindowDC::DrawSpline( wxList *points ) |
| 588 | { |
| 589 | wxPoint *p; |
| 590 | double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4; |
| 591 | double x1, y1, x2, y2; |
| 592 | |
| 593 | wxNode *node = points->First(); |
| 594 | p = (wxPoint *)node->Data(); |
| 595 | |
| 596 | x1 = p->x; |
| 597 | y1 = p->y; |
| 598 | |
| 599 | node = node->Next(); |
| 600 | p = (wxPoint *)node->Data(); |
| 601 | |
| 602 | x2 = p->x; |
| 603 | y2 = p->y; |
| 604 | cx1 = (double)((x1 + x2) / 2); |
| 605 | cy1 = (double)((y1 + y2) / 2); |
| 606 | cx2 = (double)((cx1 + x2) / 2); |
| 607 | cy2 = (double)((cy1 + y2) / 2); |
| 608 | |
| 609 | wx_spline_add_point(x1, y1); |
| 610 | |
| 611 | while ((node = node->Next()) != NULL) |
| 612 | { |
| 613 | p = (wxPoint *)node->Data(); |
| 614 | x1 = x2; |
| 615 | y1 = y2; |
| 616 | x2 = p->x; |
| 617 | y2 = p->y; |
| 618 | cx4 = (double)(x1 + x2) / 2; |
| 619 | cy4 = (double)(y1 + y2) / 2; |
| 620 | cx3 = (double)(x1 + cx4) / 2; |
| 621 | cy3 = (double)(y1 + cy4) / 2; |
| 622 | |
| 623 | wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4); |
| 624 | |
| 625 | cx1 = cx4; |
| 626 | cy1 = cy4; |
| 627 | cx2 = (double)(cx1 + x2) / 2; |
| 628 | cy2 = (double)(cy1 + y2) / 2; |
| 629 | } |
| 630 | |
| 631 | wx_spline_add_point( cx1, cy1 ); |
| 632 | wx_spline_add_point( x2, y2 ); |
| 633 | |
| 634 | wx_spline_draw_point_array( this ); |
| 635 | }; |