| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: layout.cpp |
| 3 | // Purpose: Constraint layout system classes |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 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 | #ifdef __GNUG__ |
| 21 | #pragma implementation "layout.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 | #ifndef WX_PRECOMP |
| 32 | #include "wx/defs.h" |
| 33 | #endif |
| 34 | |
| 35 | #if wxUSE_CONSTRAINTS |
| 36 | |
| 37 | #ifndef WX_PRECOMP |
| 38 | #include "wx/window.h" |
| 39 | #include "wx/utils.h" |
| 40 | #include "wx/dialog.h" |
| 41 | #include "wx/msgdlg.h" |
| 42 | #include "wx/intl.h" |
| 43 | #endif |
| 44 | |
| 45 | #include "wx/layout.h" |
| 46 | |
| 47 | IMPLEMENT_DYNAMIC_CLASS(wxIndividualLayoutConstraint, wxObject) |
| 48 | IMPLEMENT_DYNAMIC_CLASS(wxLayoutConstraints, wxObject) |
| 49 | |
| 50 | |
| 51 | wxIndividualLayoutConstraint::wxIndividualLayoutConstraint() |
| 52 | { |
| 53 | myEdge = wxTop; |
| 54 | relationship = wxUnconstrained; |
| 55 | margin = 0; |
| 56 | value = 0; |
| 57 | percent = 0; |
| 58 | otherEdge = wxTop; |
| 59 | done = FALSE; |
| 60 | otherWin = (wxWindowBase *) NULL; |
| 61 | } |
| 62 | |
| 63 | wxIndividualLayoutConstraint::~wxIndividualLayoutConstraint() |
| 64 | { |
| 65 | } |
| 66 | |
| 67 | void wxIndividualLayoutConstraint::Set(wxRelationship rel, wxWindowBase *otherW, wxEdge otherE, int val, int marg) |
| 68 | { |
| 69 | if (rel == wxSameAs) |
| 70 | { |
| 71 | // If Set is called by the user with wxSameAs then call SameAs to do |
| 72 | // it since it will actually use wxPercent instead. |
| 73 | SameAs(otherW, otherE, marg); |
| 74 | return; |
| 75 | } |
| 76 | |
| 77 | relationship = rel; |
| 78 | otherWin = otherW; |
| 79 | otherEdge = otherE; |
| 80 | |
| 81 | if ( rel == wxPercentOf ) |
| 82 | { |
| 83 | percent = val; |
| 84 | } |
| 85 | else |
| 86 | { |
| 87 | value = val; |
| 88 | } |
| 89 | |
| 90 | margin = marg; |
| 91 | } |
| 92 | |
| 93 | void wxIndividualLayoutConstraint::LeftOf(wxWindowBase *sibling, int marg) |
| 94 | { |
| 95 | Set(wxLeftOf, sibling, wxLeft, 0, marg); |
| 96 | } |
| 97 | |
| 98 | void wxIndividualLayoutConstraint::RightOf(wxWindowBase *sibling, int marg) |
| 99 | { |
| 100 | Set(wxRightOf, sibling, wxRight, 0, marg); |
| 101 | } |
| 102 | |
| 103 | void wxIndividualLayoutConstraint::Above(wxWindowBase *sibling, int marg) |
| 104 | { |
| 105 | Set(wxAbove, sibling, wxTop, 0, marg); |
| 106 | } |
| 107 | |
| 108 | void wxIndividualLayoutConstraint::Below(wxWindowBase *sibling, int marg) |
| 109 | { |
| 110 | Set(wxBelow, sibling, wxBottom, 0, marg); |
| 111 | } |
| 112 | |
| 113 | // |
| 114 | // 'Same edge' alignment |
| 115 | // |
| 116 | void wxIndividualLayoutConstraint::SameAs(wxWindowBase *otherW, wxEdge edge, int marg) |
| 117 | { |
| 118 | Set(wxPercentOf, otherW, edge, 100, marg); |
| 119 | } |
| 120 | |
| 121 | // The edge is a percentage of the other window's edge |
| 122 | void wxIndividualLayoutConstraint::PercentOf(wxWindowBase *otherW, wxEdge wh, int per) |
| 123 | { |
| 124 | Set(wxPercentOf, otherW, wh, per); |
| 125 | } |
| 126 | |
| 127 | // |
| 128 | // Edge has absolute value |
| 129 | // |
| 130 | void wxIndividualLayoutConstraint::Absolute(int val) |
| 131 | { |
| 132 | value = val; |
| 133 | relationship = wxAbsolute; |
| 134 | } |
| 135 | |
| 136 | // Reset constraint if it mentions otherWin |
| 137 | bool wxIndividualLayoutConstraint::ResetIfWin(wxWindowBase *otherW) |
| 138 | { |
| 139 | if (otherW == otherWin) |
| 140 | { |
| 141 | myEdge = wxTop; |
| 142 | relationship = wxAsIs; |
| 143 | margin = 0; |
| 144 | value = 0; |
| 145 | percent = 0; |
| 146 | otherEdge = wxTop; |
| 147 | otherWin = (wxWindowBase *) NULL; |
| 148 | return TRUE; |
| 149 | } |
| 150 | |
| 151 | return FALSE; |
| 152 | } |
| 153 | |
| 154 | // Try to satisfy constraint |
| 155 | bool wxIndividualLayoutConstraint::SatisfyConstraint(wxLayoutConstraints *constraints, wxWindowBase *win) |
| 156 | { |
| 157 | if (relationship == wxAbsolute) |
| 158 | { |
| 159 | done = TRUE; |
| 160 | return TRUE; |
| 161 | } |
| 162 | |
| 163 | switch (myEdge) |
| 164 | { |
| 165 | case wxLeft: |
| 166 | { |
| 167 | switch (relationship) |
| 168 | { |
| 169 | case wxLeftOf: |
| 170 | { |
| 171 | // We can know this edge if: otherWin is win's |
| 172 | // parent, or otherWin has a satisfied constraint, |
| 173 | // or otherWin has no constraint. |
| 174 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 175 | if (edgePos != -1) |
| 176 | { |
| 177 | value = edgePos - margin; |
| 178 | done = TRUE; |
| 179 | return TRUE; |
| 180 | } |
| 181 | else |
| 182 | return FALSE; |
| 183 | } |
| 184 | case wxRightOf: |
| 185 | { |
| 186 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 187 | if (edgePos != -1) |
| 188 | { |
| 189 | value = edgePos + margin; |
| 190 | done = TRUE; |
| 191 | return TRUE; |
| 192 | } |
| 193 | else |
| 194 | return FALSE; |
| 195 | } |
| 196 | case wxPercentOf: |
| 197 | { |
| 198 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 199 | if (edgePos != -1) |
| 200 | { |
| 201 | value = (int)(edgePos*(((float)percent)*0.01) + margin); |
| 202 | done = TRUE; |
| 203 | return TRUE; |
| 204 | } |
| 205 | else |
| 206 | return FALSE; |
| 207 | } |
| 208 | case wxUnconstrained: |
| 209 | { |
| 210 | // We know the left-hand edge position if we know |
| 211 | // the right-hand edge and we know the width; OR if |
| 212 | // we know the centre and the width. |
| 213 | if (constraints->right.GetDone() && constraints->width.GetDone()) |
| 214 | { |
| 215 | value = (constraints->right.GetValue() - constraints->width.GetValue() + margin); |
| 216 | done = TRUE; |
| 217 | return TRUE; |
| 218 | } |
| 219 | else if (constraints->centreX.GetDone() && constraints->width.GetDone()) |
| 220 | { |
| 221 | value = (int)(constraints->centreX.GetValue() - (constraints->width.GetValue()/2) + margin); |
| 222 | done = TRUE; |
| 223 | return TRUE; |
| 224 | } |
| 225 | else |
| 226 | return FALSE; |
| 227 | } |
| 228 | case wxAsIs: |
| 229 | { |
| 230 | int y; |
| 231 | win->GetPosition(&value, &y); |
| 232 | done = TRUE; |
| 233 | return TRUE; |
| 234 | } |
| 235 | default: |
| 236 | break; |
| 237 | } |
| 238 | break; |
| 239 | } |
| 240 | case wxRight: |
| 241 | { |
| 242 | switch (relationship) |
| 243 | { |
| 244 | case wxLeftOf: |
| 245 | { |
| 246 | // We can know this edge if: otherWin is win's |
| 247 | // parent, or otherWin has a satisfied constraint, |
| 248 | // or otherWin has no constraint. |
| 249 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 250 | if (edgePos != -1) |
| 251 | { |
| 252 | value = edgePos - margin; |
| 253 | done = TRUE; |
| 254 | return TRUE; |
| 255 | } |
| 256 | else |
| 257 | return FALSE; |
| 258 | } |
| 259 | case wxRightOf: |
| 260 | { |
| 261 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 262 | if (edgePos != -1) |
| 263 | { |
| 264 | value = edgePos + margin; |
| 265 | done = TRUE; |
| 266 | return TRUE; |
| 267 | } |
| 268 | else |
| 269 | return FALSE; |
| 270 | } |
| 271 | case wxPercentOf: |
| 272 | { |
| 273 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 274 | if (edgePos != -1) |
| 275 | { |
| 276 | value = (int)(edgePos*(((float)percent)*0.01) - margin); |
| 277 | done = TRUE; |
| 278 | return TRUE; |
| 279 | } |
| 280 | else |
| 281 | return FALSE; |
| 282 | } |
| 283 | case wxUnconstrained: |
| 284 | { |
| 285 | // We know the right-hand edge position if we know the |
| 286 | // left-hand edge and we know the width, OR if we know the |
| 287 | // centre edge and the width. |
| 288 | if (constraints->left.GetDone() && constraints->width.GetDone()) |
| 289 | { |
| 290 | value = (constraints->left.GetValue() + constraints->width.GetValue() - margin); |
| 291 | done = TRUE; |
| 292 | return TRUE; |
| 293 | } |
| 294 | else if (constraints->centreX.GetDone() && constraints->width.GetDone()) |
| 295 | { |
| 296 | value = (int)(constraints->centreX.GetValue() + (constraints->width.GetValue()/2) - margin); |
| 297 | done = TRUE; |
| 298 | return TRUE; |
| 299 | } |
| 300 | else |
| 301 | return FALSE; |
| 302 | } |
| 303 | case wxAsIs: |
| 304 | { |
| 305 | int x, y; |
| 306 | int w, h; |
| 307 | win->GetSize(&w, &h); |
| 308 | win->GetPosition(&x, &y); |
| 309 | value = x + w; |
| 310 | done = TRUE; |
| 311 | return TRUE; |
| 312 | } |
| 313 | default: |
| 314 | break; |
| 315 | } |
| 316 | break; |
| 317 | } |
| 318 | case wxTop: |
| 319 | { |
| 320 | switch (relationship) |
| 321 | { |
| 322 | case wxAbove: |
| 323 | { |
| 324 | // We can know this edge if: otherWin is win's |
| 325 | // parent, or otherWin has a satisfied constraint, |
| 326 | // or otherWin has no constraint. |
| 327 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 328 | if (edgePos != -1) |
| 329 | { |
| 330 | value = edgePos - margin; |
| 331 | done = TRUE; |
| 332 | return TRUE; |
| 333 | } |
| 334 | else |
| 335 | return FALSE; |
| 336 | } |
| 337 | case wxBelow: |
| 338 | { |
| 339 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 340 | if (edgePos != -1) |
| 341 | { |
| 342 | value = edgePos + margin; |
| 343 | done = TRUE; |
| 344 | return TRUE; |
| 345 | } |
| 346 | else |
| 347 | return FALSE; |
| 348 | } |
| 349 | case wxPercentOf: |
| 350 | { |
| 351 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 352 | if (edgePos != -1) |
| 353 | { |
| 354 | value = (int)(edgePos*(((float)percent)*0.01) + margin); |
| 355 | done = TRUE; |
| 356 | return TRUE; |
| 357 | } |
| 358 | else |
| 359 | return FALSE; |
| 360 | } |
| 361 | case wxUnconstrained: |
| 362 | { |
| 363 | // We know the top edge position if we know the bottom edge |
| 364 | // and we know the height; OR if we know the centre edge and |
| 365 | // the height. |
| 366 | if (constraints->bottom.GetDone() && constraints->height.GetDone()) |
| 367 | { |
| 368 | value = (constraints->bottom.GetValue() - constraints->height.GetValue() + margin); |
| 369 | done = TRUE; |
| 370 | return TRUE; |
| 371 | } |
| 372 | else if (constraints->centreY.GetDone() && constraints->height.GetDone()) |
| 373 | { |
| 374 | value = (constraints->centreY.GetValue() - (constraints->height.GetValue()/2) + margin); |
| 375 | done = TRUE; |
| 376 | return TRUE; |
| 377 | } |
| 378 | else |
| 379 | return FALSE; |
| 380 | } |
| 381 | case wxAsIs: |
| 382 | { |
| 383 | int x; |
| 384 | win->GetPosition(&x, &value); |
| 385 | done = TRUE; |
| 386 | return TRUE; |
| 387 | } |
| 388 | default: |
| 389 | break; |
| 390 | } |
| 391 | break; |
| 392 | } |
| 393 | case wxBottom: |
| 394 | { |
| 395 | switch (relationship) |
| 396 | { |
| 397 | case wxAbove: |
| 398 | { |
| 399 | // We can know this edge if: otherWin is win's parent, |
| 400 | // or otherWin has a satisfied constraint, or |
| 401 | // otherWin has no constraint. |
| 402 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 403 | if (edgePos != -1) |
| 404 | { |
| 405 | value = edgePos + margin; |
| 406 | done = TRUE; |
| 407 | return TRUE; |
| 408 | } |
| 409 | else |
| 410 | return FALSE; |
| 411 | } |
| 412 | case wxBelow: |
| 413 | { |
| 414 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 415 | if (edgePos != -1) |
| 416 | { |
| 417 | value = edgePos - margin; |
| 418 | done = TRUE; |
| 419 | return TRUE; |
| 420 | } |
| 421 | else |
| 422 | return FALSE; |
| 423 | } |
| 424 | case wxPercentOf: |
| 425 | { |
| 426 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 427 | if (edgePos != -1) |
| 428 | { |
| 429 | value = (int)(edgePos*(((float)percent)*0.01) - margin); |
| 430 | done = TRUE; |
| 431 | return TRUE; |
| 432 | } |
| 433 | else |
| 434 | return FALSE; |
| 435 | } |
| 436 | case wxUnconstrained: |
| 437 | { |
| 438 | // We know the bottom edge position if we know the top edge |
| 439 | // and we know the height; OR if we know the centre edge and |
| 440 | // the height. |
| 441 | if (constraints->top.GetDone() && constraints->height.GetDone()) |
| 442 | { |
| 443 | value = (constraints->top.GetValue() + constraints->height.GetValue() - margin); |
| 444 | done = TRUE; |
| 445 | return TRUE; |
| 446 | } |
| 447 | else if (constraints->centreY.GetDone() && constraints->height.GetDone()) |
| 448 | { |
| 449 | value = (constraints->centreY.GetValue() + (constraints->height.GetValue()/2) - margin); |
| 450 | done = TRUE; |
| 451 | return TRUE; |
| 452 | } |
| 453 | else |
| 454 | return FALSE; |
| 455 | } |
| 456 | case wxAsIs: |
| 457 | { |
| 458 | int x, y; |
| 459 | int w, h; |
| 460 | win->GetSize(&w, &h); |
| 461 | win->GetPosition(&x, &y); |
| 462 | value = h + y; |
| 463 | done = TRUE; |
| 464 | return TRUE; |
| 465 | } |
| 466 | default: |
| 467 | break; |
| 468 | } |
| 469 | break; |
| 470 | } |
| 471 | case wxCentreX: |
| 472 | { |
| 473 | switch (relationship) |
| 474 | { |
| 475 | case wxLeftOf: |
| 476 | { |
| 477 | // We can know this edge if: otherWin is win's parent, or |
| 478 | // otherWin has a satisfied constraint, or otherWin has no |
| 479 | // constraint. |
| 480 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 481 | if (edgePos != -1) |
| 482 | { |
| 483 | value = edgePos - margin; |
| 484 | done = TRUE; |
| 485 | return TRUE; |
| 486 | } |
| 487 | else |
| 488 | return FALSE; |
| 489 | } |
| 490 | case wxRightOf: |
| 491 | { |
| 492 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 493 | if (edgePos != -1) |
| 494 | { |
| 495 | value = edgePos + margin; |
| 496 | done = TRUE; |
| 497 | return TRUE; |
| 498 | } |
| 499 | else |
| 500 | return FALSE; |
| 501 | } |
| 502 | case wxPercentOf: |
| 503 | { |
| 504 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 505 | if (edgePos != -1) |
| 506 | { |
| 507 | value = (int)(edgePos*(((float)percent)*0.01) + margin); |
| 508 | done = TRUE; |
| 509 | return TRUE; |
| 510 | } |
| 511 | else |
| 512 | return FALSE; |
| 513 | } |
| 514 | case wxUnconstrained: |
| 515 | { |
| 516 | // We know the centre position if we know |
| 517 | // the left-hand edge and we know the width, OR |
| 518 | // the right-hand edge and the width |
| 519 | if (constraints->left.GetDone() && constraints->width.GetDone()) |
| 520 | { |
| 521 | value = (int)(constraints->left.GetValue() + (constraints->width.GetValue()/2) + margin); |
| 522 | done = TRUE; |
| 523 | return TRUE; |
| 524 | } |
| 525 | else if (constraints->right.GetDone() && constraints->width.GetDone()) |
| 526 | { |
| 527 | value = (int)(constraints->left.GetValue() - (constraints->width.GetValue()/2) + margin); |
| 528 | done = TRUE; |
| 529 | return TRUE; |
| 530 | } |
| 531 | else |
| 532 | return FALSE; |
| 533 | } |
| 534 | default: |
| 535 | break; |
| 536 | } |
| 537 | break; |
| 538 | } |
| 539 | case wxCentreY: |
| 540 | { |
| 541 | switch (relationship) |
| 542 | { |
| 543 | case wxAbove: |
| 544 | { |
| 545 | // We can know this edge if: otherWin is win's parent, |
| 546 | // or otherWin has a satisfied constraint, or otherWin |
| 547 | // has no constraint. |
| 548 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 549 | if (edgePos != -1) |
| 550 | { |
| 551 | value = edgePos - margin; |
| 552 | done = TRUE; |
| 553 | return TRUE; |
| 554 | } |
| 555 | else |
| 556 | return FALSE; |
| 557 | } |
| 558 | case wxBelow: |
| 559 | { |
| 560 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 561 | if (edgePos != -1) |
| 562 | { |
| 563 | value = edgePos + margin; |
| 564 | done = TRUE; |
| 565 | return TRUE; |
| 566 | } |
| 567 | else |
| 568 | return FALSE; |
| 569 | } |
| 570 | case wxPercentOf: |
| 571 | { |
| 572 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 573 | if (edgePos != -1) |
| 574 | { |
| 575 | value = (int)(edgePos*(((float)percent)*0.01) + margin); |
| 576 | done = TRUE; |
| 577 | return TRUE; |
| 578 | } |
| 579 | else |
| 580 | return FALSE; |
| 581 | } |
| 582 | case wxUnconstrained: |
| 583 | { |
| 584 | // We know the centre position if we know |
| 585 | // the top edge and we know the height, OR |
| 586 | // the bottom edge and the height. |
| 587 | if (constraints->bottom.GetDone() && constraints->height.GetDone()) |
| 588 | { |
| 589 | value = (int)(constraints->bottom.GetValue() - (constraints->height.GetValue()/2) + margin); |
| 590 | done = TRUE; |
| 591 | return TRUE; |
| 592 | } |
| 593 | else if (constraints->top.GetDone() && constraints->height.GetDone()) |
| 594 | { |
| 595 | value = (int)(constraints->top.GetValue() + (constraints->height.GetValue()/2) + margin); |
| 596 | done = TRUE; |
| 597 | return TRUE; |
| 598 | } |
| 599 | else |
| 600 | return FALSE; |
| 601 | } |
| 602 | default: |
| 603 | break; |
| 604 | } |
| 605 | break; |
| 606 | } |
| 607 | case wxWidth: |
| 608 | { |
| 609 | switch (relationship) |
| 610 | { |
| 611 | case wxPercentOf: |
| 612 | { |
| 613 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 614 | if (edgePos != -1) |
| 615 | { |
| 616 | value = (int)(edgePos*(((float)percent)*0.01)); |
| 617 | done = TRUE; |
| 618 | return TRUE; |
| 619 | } |
| 620 | else |
| 621 | return FALSE; |
| 622 | } |
| 623 | case wxAsIs: |
| 624 | { |
| 625 | if (win) |
| 626 | { |
| 627 | int h; |
| 628 | win->GetSize(&value, &h); |
| 629 | done = TRUE; |
| 630 | return TRUE; |
| 631 | } |
| 632 | else return FALSE; |
| 633 | } |
| 634 | case wxUnconstrained: |
| 635 | { |
| 636 | // We know the width if we know the left edge and the right edge, OR |
| 637 | // if we know the left edge and the centre, OR |
| 638 | // if we know the right edge and the centre |
| 639 | if (constraints->left.GetDone() && constraints->right.GetDone()) |
| 640 | { |
| 641 | value = constraints->right.GetValue() - constraints->left.GetValue(); |
| 642 | done = TRUE; |
| 643 | return TRUE; |
| 644 | } |
| 645 | else if (constraints->centreX.GetDone() && constraints->left.GetDone()) |
| 646 | { |
| 647 | value = (int)(2*(constraints->centreX.GetValue() - constraints->left.GetValue())); |
| 648 | done = TRUE; |
| 649 | return TRUE; |
| 650 | } |
| 651 | else if (constraints->centreX.GetDone() && constraints->right.GetDone()) |
| 652 | { |
| 653 | value = (int)(2*(constraints->right.GetValue() - constraints->centreX.GetValue())); |
| 654 | done = TRUE; |
| 655 | return TRUE; |
| 656 | } |
| 657 | else |
| 658 | return FALSE; |
| 659 | } |
| 660 | default: |
| 661 | break; |
| 662 | } |
| 663 | break; |
| 664 | } |
| 665 | case wxHeight: |
| 666 | { |
| 667 | switch (relationship) |
| 668 | { |
| 669 | case wxPercentOf: |
| 670 | { |
| 671 | int edgePos = GetEdge(otherEdge, win, otherWin); |
| 672 | if (edgePos != -1) |
| 673 | { |
| 674 | value = (int)(edgePos*(((float)percent)*0.01)); |
| 675 | done = TRUE; |
| 676 | return TRUE; |
| 677 | } |
| 678 | else |
| 679 | return FALSE; |
| 680 | } |
| 681 | case wxAsIs: |
| 682 | { |
| 683 | if (win) |
| 684 | { |
| 685 | int w; |
| 686 | win->GetSize(&w, &value); |
| 687 | done = TRUE; |
| 688 | return TRUE; |
| 689 | } |
| 690 | else return FALSE; |
| 691 | } |
| 692 | case wxUnconstrained: |
| 693 | { |
| 694 | // We know the height if we know the top edge and the bottom edge, OR |
| 695 | // if we know the top edge and the centre, OR |
| 696 | // if we know the bottom edge and the centre |
| 697 | if (constraints->top.GetDone() && constraints->bottom.GetDone()) |
| 698 | { |
| 699 | value = constraints->bottom.GetValue() - constraints->top.GetValue(); |
| 700 | done = TRUE; |
| 701 | return TRUE; |
| 702 | } |
| 703 | else if (constraints->top.GetDone() && constraints->centreY.GetDone()) |
| 704 | { |
| 705 | value = (int)(2*(constraints->centreY.GetValue() - constraints->top.GetValue())); |
| 706 | done = TRUE; |
| 707 | return TRUE; |
| 708 | } |
| 709 | else if (constraints->bottom.GetDone() && constraints->centreY.GetDone()) |
| 710 | { |
| 711 | value = (int)(2*(constraints->bottom.GetValue() - constraints->centreY.GetValue())); |
| 712 | done = TRUE; |
| 713 | return TRUE; |
| 714 | } |
| 715 | else |
| 716 | return FALSE; |
| 717 | } |
| 718 | default: |
| 719 | break; |
| 720 | } |
| 721 | break; |
| 722 | } |
| 723 | default: |
| 724 | break; |
| 725 | } |
| 726 | return FALSE; |
| 727 | } |
| 728 | |
| 729 | // Get the value of this edge or dimension, or if this is not determinable, -1. |
| 730 | int wxIndividualLayoutConstraint::GetEdge(wxEdge which, |
| 731 | wxWindowBase *thisWin, |
| 732 | wxWindowBase *other) const |
| 733 | { |
| 734 | // If the edge or dimension belongs to the parent, then we know the |
| 735 | // dimension is obtainable immediately. E.g. a wxExpandSizer may contain a |
| 736 | // button (but the button's true parent is a panel, not the sizer) |
| 737 | if (other->GetChildren().Find(thisWin)) |
| 738 | { |
| 739 | switch (which) |
| 740 | { |
| 741 | case wxLeft: |
| 742 | { |
| 743 | return 0; |
| 744 | } |
| 745 | case wxTop: |
| 746 | { |
| 747 | return 0; |
| 748 | } |
| 749 | case wxRight: |
| 750 | { |
| 751 | int w, h; |
| 752 | other->GetClientSizeConstraint(&w, &h); |
| 753 | return w; |
| 754 | } |
| 755 | case wxBottom: |
| 756 | { |
| 757 | int w, h; |
| 758 | other->GetClientSizeConstraint(&w, &h); |
| 759 | return h; |
| 760 | } |
| 761 | case wxWidth: |
| 762 | { |
| 763 | int w, h; |
| 764 | other->GetClientSizeConstraint(&w, &h); |
| 765 | return w; |
| 766 | } |
| 767 | case wxHeight: |
| 768 | { |
| 769 | int w, h; |
| 770 | other->GetClientSizeConstraint(&w, &h); |
| 771 | return h; |
| 772 | } |
| 773 | case wxCentreX: |
| 774 | case wxCentreY: |
| 775 | { |
| 776 | int w, h; |
| 777 | other->GetClientSizeConstraint(&w, &h); |
| 778 | if (which == wxCentreX) |
| 779 | return (int)(w/2); |
| 780 | else |
| 781 | return (int)(h/2); |
| 782 | } |
| 783 | default: |
| 784 | return -1; |
| 785 | } |
| 786 | } |
| 787 | switch (which) |
| 788 | { |
| 789 | case wxLeft: |
| 790 | { |
| 791 | wxLayoutConstraints *constr = other->GetConstraints(); |
| 792 | // If no constraints, it means the window is not dependent |
| 793 | // on anything, and therefore we know its value immediately |
| 794 | if (constr) |
| 795 | { |
| 796 | if (constr->left.GetDone()) |
| 797 | return constr->left.GetValue(); |
| 798 | else |
| 799 | return -1; |
| 800 | } |
| 801 | else |
| 802 | { |
| 803 | int x, y; |
| 804 | other->GetPosition(&x, &y); |
| 805 | return x; |
| 806 | } |
| 807 | } |
| 808 | case wxTop: |
| 809 | { |
| 810 | wxLayoutConstraints *constr = other->GetConstraints(); |
| 811 | // If no constraints, it means the window is not dependent |
| 812 | // on anything, and therefore we know its value immediately |
| 813 | if (constr) |
| 814 | { |
| 815 | if (constr->top.GetDone()) |
| 816 | return constr->top.GetValue(); |
| 817 | else |
| 818 | return -1; |
| 819 | } |
| 820 | else |
| 821 | { |
| 822 | int x, y; |
| 823 | other->GetPosition(&x, &y); |
| 824 | return y; |
| 825 | } |
| 826 | } |
| 827 | case wxRight: |
| 828 | { |
| 829 | wxLayoutConstraints *constr = other->GetConstraints(); |
| 830 | // If no constraints, it means the window is not dependent |
| 831 | // on anything, and therefore we know its value immediately |
| 832 | if (constr) |
| 833 | { |
| 834 | if (constr->right.GetDone()) |
| 835 | return constr->right.GetValue(); |
| 836 | else |
| 837 | return -1; |
| 838 | } |
| 839 | else |
| 840 | { |
| 841 | int x, y, w, h; |
| 842 | other->GetPosition(&x, &y); |
| 843 | other->GetSize(&w, &h); |
| 844 | return (int)(x + w); |
| 845 | } |
| 846 | } |
| 847 | case wxBottom: |
| 848 | { |
| 849 | wxLayoutConstraints *constr = other->GetConstraints(); |
| 850 | // If no constraints, it means the window is not dependent |
| 851 | // on anything, and therefore we know its value immediately |
| 852 | if (constr) |
| 853 | { |
| 854 | if (constr->bottom.GetDone()) |
| 855 | return constr->bottom.GetValue(); |
| 856 | else |
| 857 | return -1; |
| 858 | } |
| 859 | else |
| 860 | { |
| 861 | int x, y, w, h; |
| 862 | other->GetPosition(&x, &y); |
| 863 | other->GetSize(&w, &h); |
| 864 | return (int)(y + h); |
| 865 | } |
| 866 | } |
| 867 | case wxWidth: |
| 868 | { |
| 869 | wxLayoutConstraints *constr = other->GetConstraints(); |
| 870 | // If no constraints, it means the window is not dependent |
| 871 | // on anything, and therefore we know its value immediately |
| 872 | if (constr) |
| 873 | { |
| 874 | if (constr->width.GetDone()) |
| 875 | return constr->width.GetValue(); |
| 876 | else |
| 877 | return -1; |
| 878 | } |
| 879 | else |
| 880 | { |
| 881 | int w, h; |
| 882 | other->GetSize(&w, &h); |
| 883 | return w; |
| 884 | } |
| 885 | } |
| 886 | case wxHeight: |
| 887 | { |
| 888 | wxLayoutConstraints *constr = other->GetConstraints(); |
| 889 | // If no constraints, it means the window is not dependent |
| 890 | // on anything, and therefore we know its value immediately |
| 891 | if (constr) |
| 892 | { |
| 893 | if (constr->height.GetDone()) |
| 894 | return constr->height.GetValue(); |
| 895 | else |
| 896 | return -1; |
| 897 | } |
| 898 | else |
| 899 | { |
| 900 | int w, h; |
| 901 | other->GetSize(&w, &h); |
| 902 | return h; |
| 903 | } |
| 904 | } |
| 905 | case wxCentreX: |
| 906 | { |
| 907 | wxLayoutConstraints *constr = other->GetConstraints(); |
| 908 | // If no constraints, it means the window is not dependent |
| 909 | // on anything, and therefore we know its value immediately |
| 910 | if (constr) |
| 911 | { |
| 912 | if (constr->centreX.GetDone()) |
| 913 | return constr->centreX.GetValue(); |
| 914 | else |
| 915 | return -1; |
| 916 | } |
| 917 | else |
| 918 | { |
| 919 | int x, y, w, h; |
| 920 | other->GetPosition(&x, &y); |
| 921 | other->GetSize(&w, &h); |
| 922 | return (int)(x + (w/2)); |
| 923 | } |
| 924 | } |
| 925 | case wxCentreY: |
| 926 | { |
| 927 | wxLayoutConstraints *constr = other->GetConstraints(); |
| 928 | // If no constraints, it means the window is not dependent |
| 929 | // on anything, and therefore we know its value immediately |
| 930 | if (constr) |
| 931 | { |
| 932 | if (constr->centreY.GetDone()) |
| 933 | return constr->centreY.GetValue(); |
| 934 | else |
| 935 | return -1; |
| 936 | } |
| 937 | else |
| 938 | { |
| 939 | int x, y, w, h; |
| 940 | other->GetPosition(&x, &y); |
| 941 | other->GetSize(&w, &h); |
| 942 | return (int)(y + (h/2)); |
| 943 | } |
| 944 | } |
| 945 | default: |
| 946 | break; |
| 947 | } |
| 948 | return -1; |
| 949 | } |
| 950 | |
| 951 | wxLayoutConstraints::wxLayoutConstraints() |
| 952 | { |
| 953 | left.SetEdge(wxLeft); |
| 954 | top.SetEdge(wxTop); |
| 955 | right.SetEdge(wxRight); |
| 956 | bottom.SetEdge(wxBottom); |
| 957 | centreX.SetEdge(wxCentreX); |
| 958 | centreY.SetEdge(wxCentreY); |
| 959 | width.SetEdge(wxWidth); |
| 960 | height.SetEdge(wxHeight); |
| 961 | } |
| 962 | |
| 963 | wxLayoutConstraints::~wxLayoutConstraints() |
| 964 | { |
| 965 | } |
| 966 | |
| 967 | bool wxLayoutConstraints::SatisfyConstraints(wxWindowBase *win, int *nChanges) |
| 968 | { |
| 969 | int noChanges = 0; |
| 970 | |
| 971 | bool done = width.GetDone(); |
| 972 | bool newDone = (done ? TRUE : width.SatisfyConstraint(this, win)); |
| 973 | if (newDone != done) |
| 974 | noChanges ++; |
| 975 | |
| 976 | done = height.GetDone(); |
| 977 | newDone = (done ? TRUE : height.SatisfyConstraint(this, win)); |
| 978 | if (newDone != done) |
| 979 | noChanges ++; |
| 980 | |
| 981 | done = left.GetDone(); |
| 982 | newDone = (done ? TRUE : left.SatisfyConstraint(this, win)); |
| 983 | if (newDone != done) |
| 984 | noChanges ++; |
| 985 | |
| 986 | done = top.GetDone(); |
| 987 | newDone = (done ? TRUE : top.SatisfyConstraint(this, win)); |
| 988 | if (newDone != done) |
| 989 | noChanges ++; |
| 990 | |
| 991 | done = right.GetDone(); |
| 992 | newDone = (done ? TRUE : right.SatisfyConstraint(this, win)); |
| 993 | if (newDone != done) |
| 994 | noChanges ++; |
| 995 | |
| 996 | done = bottom.GetDone(); |
| 997 | newDone = (done ? TRUE : bottom.SatisfyConstraint(this, win)); |
| 998 | if (newDone != done) |
| 999 | noChanges ++; |
| 1000 | |
| 1001 | done = centreX.GetDone(); |
| 1002 | newDone = (done ? TRUE : centreX.SatisfyConstraint(this, win)); |
| 1003 | if (newDone != done) |
| 1004 | noChanges ++; |
| 1005 | |
| 1006 | done = centreY.GetDone(); |
| 1007 | newDone = (done ? TRUE : centreY.SatisfyConstraint(this, win)); |
| 1008 | if (newDone != done) |
| 1009 | noChanges ++; |
| 1010 | |
| 1011 | *nChanges = noChanges; |
| 1012 | |
| 1013 | return AreSatisfied(); |
| 1014 | } |
| 1015 | |
| 1016 | /* |
| 1017 | * Main constrained layout algorithm. Look at all the child |
| 1018 | * windows, and their constraints (if any). |
| 1019 | * The idea is to keep iterating through the constraints |
| 1020 | * until all left, right, bottom and top edges, and widths and heights, |
| 1021 | * are known (or no change occurs and we've failed to resolve all |
| 1022 | * constraints). |
| 1023 | * |
| 1024 | * If the user has not specified a dimension or edge, it will be |
| 1025 | * be calculated from the other known values. E.g. If we know |
| 1026 | * the right hand edge and the left hand edge, we now know the width. |
| 1027 | * The snag here is that this means we must specify absolute dimensions |
| 1028 | * twice (in constructor and in constraint), if we wish to use the |
| 1029 | * constraint notation to just set the position, for example. |
| 1030 | * Otherwise, if we only set ONE edge and no dimension, it would never |
| 1031 | * find the other edge. |
| 1032 | * |
| 1033 | * Algorithm: |
| 1034 | |
| 1035 | Mark all constraints as not done. |
| 1036 | |
| 1037 | iterations = 0; |
| 1038 | until no change or iterations >= max iterations |
| 1039 | For each child: |
| 1040 | { |
| 1041 | Calculate all constraints |
| 1042 | } |
| 1043 | iterations ++; |
| 1044 | |
| 1045 | For each child |
| 1046 | Set each calculated position and size |
| 1047 | |
| 1048 | */ |
| 1049 | |
| 1050 | #if WXWIN_COMPATIBILITY |
| 1051 | bool wxOldDoLayout(wxWindowBase *win) |
| 1052 | { |
| 1053 | // Make sure this isn't called recursively from below |
| 1054 | static wxList doneSoFar; |
| 1055 | |
| 1056 | if (doneSoFar.Member(win)) |
| 1057 | return TRUE; |
| 1058 | |
| 1059 | doneSoFar.Append(win); |
| 1060 | |
| 1061 | wxNode *node = win->GetChildren().First(); |
| 1062 | while (node) |
| 1063 | { |
| 1064 | wxWindowBase *child = (wxWindowBase *)node->Data(); |
| 1065 | wxLayoutConstraints *constr = child->GetConstraints(); |
| 1066 | if (constr) |
| 1067 | { |
| 1068 | constr->left.SetDone(FALSE); |
| 1069 | constr->top.SetDone(FALSE); |
| 1070 | constr->right.SetDone(FALSE); |
| 1071 | constr->bottom.SetDone(FALSE); |
| 1072 | constr->width.SetDone(FALSE); |
| 1073 | constr->height.SetDone(FALSE); |
| 1074 | constr->centreX.SetDone(FALSE); |
| 1075 | constr->centreY.SetDone(FALSE); |
| 1076 | } |
| 1077 | node = node->Next(); |
| 1078 | } |
| 1079 | int noIterations = 0; |
| 1080 | int maxIterations = 500; |
| 1081 | int noChanges = 1; |
| 1082 | |
| 1083 | while ((noChanges > 0) && (noIterations < maxIterations)) |
| 1084 | { |
| 1085 | noChanges = 0; |
| 1086 | wxNode *node = win->GetChildren().First(); |
| 1087 | while (node) |
| 1088 | { |
| 1089 | wxWindowBase *child = (wxWindowBase *)node->Data(); |
| 1090 | wxLayoutConstraints *constr = child->GetConstraints(); |
| 1091 | if (constr) |
| 1092 | { |
| 1093 | int tempNoChanges = 0; |
| 1094 | (void)constr->SatisfyConstraints(child, &tempNoChanges); |
| 1095 | noChanges += tempNoChanges; |
| 1096 | } |
| 1097 | node = node->Next(); |
| 1098 | } |
| 1099 | noIterations ++; |
| 1100 | } |
| 1101 | /* |
| 1102 | // Would be nice to have a test here to see _which_ constraint(s) |
| 1103 | // failed, so we can print a specific diagnostic message. |
| 1104 | if (noFailures > 0) |
| 1105 | { |
| 1106 | wxDebugMsg(_("wxWindowBase::Layout() failed.\n")); |
| 1107 | } |
| 1108 | */ |
| 1109 | // Now set the sizes and positions of the children, and |
| 1110 | // recursively call Layout(). |
| 1111 | node = win->GetChildren().First(); |
| 1112 | while (node) |
| 1113 | { |
| 1114 | wxWindowBase *child = (wxWindowBase *)node->Data(); |
| 1115 | wxLayoutConstraints *constr = child->GetConstraints(); |
| 1116 | if (constr && constr->left.GetDone() && constr->right.GetDone() && |
| 1117 | constr->width.GetDone() && constr->height.GetDone()) |
| 1118 | { |
| 1119 | int x = constr->left.GetValue(); |
| 1120 | int y = constr->top.GetValue(); |
| 1121 | int w = constr->width.GetValue(); |
| 1122 | int h = constr->height.GetValue(); |
| 1123 | |
| 1124 | // If we don't want to resize this window, just move it... |
| 1125 | if ((constr->width.GetRelationship() != wxAsIs) || |
| 1126 | (constr->height.GetRelationship() != wxAsIs)) |
| 1127 | { |
| 1128 | // _Should_ call Layout() recursively. |
| 1129 | child->SetSize(x, y, w, h); |
| 1130 | } |
| 1131 | else |
| 1132 | { |
| 1133 | child->Move(x, y); |
| 1134 | } |
| 1135 | } |
| 1136 | else |
| 1137 | child->Layout(); |
| 1138 | node = node->Next(); |
| 1139 | } |
| 1140 | doneSoFar.DeleteObject(win); |
| 1141 | |
| 1142 | return TRUE; |
| 1143 | } |
| 1144 | #endif // WXWIN_COMPATIBILITY |
| 1145 | |
| 1146 | #endif // wxUSE_CONSTRAINTS |