contrib/src/ogl/constrnt.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        constrnt.cpp
   3 // Purpose:     OGL Constraint classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     12/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "constrnt.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include <wx/wx.h>
  25 #endif
  26
  27 #if wxUSE_DEPRECATED
  28 #include <wx/deprecated/wxexpr.h>
  29 #endif
  30
  31 #include <wx/ogl/basic.h>
  32 #include <wx/ogl/constrnt.h>
  33 #include <wx/ogl/canvas.h>
  34
  35 wxList *wxOGLConstraintTypes = NULL;
  36
  37 /*
  38  * Constraint type
  39  *
  40  */
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxOGLConstraintType, wxObject)
  43
  44 wxOGLConstraintType::wxOGLConstraintType(int theType, const wxString& theName, const wxString& thePhrase)
  45 {
  46   m_type = theType;
  47   m_name = theName;
  48   m_phrase = thePhrase;
  49 }
  50
  51 wxOGLConstraintType::~wxOGLConstraintType()
  52 {
  53 }
  54
  55 void OGLInitializeConstraintTypes()
  56 {
  57     if (!wxOGLConstraintTypes)
  58         return;
  59
  60     wxOGLConstraintTypes = new wxList(wxKEY_INTEGER);
  61
  62     wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_VERTICALLY,
  63         new wxOGLConstraintType(gyCONSTRAINT_CENTRED_VERTICALLY, wxT("Centre vertically"), wxT("centred vertically w.r.t.")));
  64
  65     wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_HORIZONTALLY,
  66         new wxOGLConstraintType(gyCONSTRAINT_CENTRED_HORIZONTALLY, wxT("Centre horizontally"), wxT("centred horizontally w.r.t.")));
  67
  68     wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_BOTH,
  69         new wxOGLConstraintType(gyCONSTRAINT_CENTRED_BOTH, wxT("Centre"), wxT("centred w.r.t.")));
  70
  71     wxOGLConstraintTypes->Append(gyCONSTRAINT_LEFT_OF,
  72         new wxOGLConstraintType(gyCONSTRAINT_LEFT_OF, wxT("Left of"), wxT("left of")));
  73
  74     wxOGLConstraintTypes->Append(gyCONSTRAINT_RIGHT_OF,
  75         new wxOGLConstraintType(gyCONSTRAINT_RIGHT_OF, wxT("Right of"), wxT("right of")));
  76
  77     wxOGLConstraintTypes->Append(gyCONSTRAINT_ABOVE,
  78         new wxOGLConstraintType(gyCONSTRAINT_ABOVE, wxT("Above"), wxT("above")));
  79
  80     wxOGLConstraintTypes->Append(gyCONSTRAINT_BELOW,
  81         new wxOGLConstraintType(gyCONSTRAINT_BELOW, wxT("Below"), wxT("below")));
  82
  83     // Alignment
  84     wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_TOP,
  85         new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_TOP, wxT("Top-aligned"), wxT("aligned to the top of")));
  86
  87     wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_BOTTOM,
  88         new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_BOTTOM, wxT("Bottom-aligned"), wxT("aligned to the bottom of")));
  89
  90     wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_LEFT,
  91         new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_LEFT, wxT("Left-aligned"), wxT("aligned to the left of")));
  92
  93     wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_RIGHT,
  94         new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_RIGHT, wxT("Right-aligned"), wxT("aligned to the right of")));
  95
  96     // Mid-alignment
  97     wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_TOP,
  98         new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_TOP, wxT("Top-midaligned"), wxT("centred on the top of")));
  99
 100     wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_BOTTOM,
 101         new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_BOTTOM, wxT("Bottom-midaligned"), wxT("centred on the bottom of")));
 102
 103     wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_LEFT,
 104         new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_LEFT, wxT("Left-midaligned"), wxT("centred on the left of")));
 105
 106     wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_RIGHT,
 107         new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_RIGHT, wxT("Right-midaligned"), wxT("centred on the right of")));
 108 }
 109
 110 void OGLCleanUpConstraintTypes()
 111 {
 112     if (!wxOGLConstraintTypes)
 113         return;
 114
 115     wxNode* node = wxOGLConstraintTypes->GetFirst();
 116     while (node)
 117     {
 118         wxOGLConstraintType* ct = (wxOGLConstraintType*) node->GetData();
 119         delete ct;
 120         node = node->GetNext();
 121     }
 122     delete wxOGLConstraintTypes;
 123     wxOGLConstraintTypes = NULL;
 124 }
 125
 126 /*
 127  * Constraint Stuff
 128  *
 129  */
 130
 131 IMPLEMENT_DYNAMIC_CLASS(wxOGLConstraint, wxObject)
 132
 133 wxOGLConstraint::wxOGLConstraint(int type, wxShape *constraining, wxList& constrained)
 134 {
 135   m_xSpacing = 0.0;
 136   m_ySpacing = 0.0;
 137
 138   m_constraintType = type;
 139   m_constrainingObject = constraining;
 140
 141   m_constraintId = 0;
 142   m_constraintName = wxT("noname");
 143
 144   wxNode *node = constrained.GetFirst();
 145   while (node)
 146   {
 147     m_constrainedObjects.Append(node->GetData());
 148     node = node->GetNext();
 149   }
 150 }
 151
 152 wxOGLConstraint::~wxOGLConstraint()
 153 {
 154 }
 155
 156 bool wxOGLConstraint::Equals(double a, double b)
 157 {
 158   double marg = 0.5;
 159
 160   bool eq = ((b <= a + marg) && (b >= a - marg));
 161   return eq;
 162 }
 163
 164 // Return TRUE if anything changed
 165 bool wxOGLConstraint::Evaluate()
 166 {
 167   double maxWidth, maxHeight, minWidth, minHeight, x, y;
 168   m_constrainingObject->GetBoundingBoxMax(&maxWidth, &maxHeight);
 169   m_constrainingObject->GetBoundingBoxMin(&minWidth, &minHeight);
 170   x = m_constrainingObject->GetX();
 171   y = m_constrainingObject->GetY();
 172
 173   wxClientDC dc(m_constrainingObject->GetCanvas());
 174   m_constrainingObject->GetCanvas()->PrepareDC(dc);
 175
 176   switch (m_constraintType)
 177   {
 178     case gyCONSTRAINT_CENTRED_VERTICALLY:
 179     {
 180       int n = m_constrainedObjects.GetCount();
 181       double totalObjectHeight = 0.0;
 182       wxNode *node = m_constrainedObjects.GetFirst();
 183       while (node)
 184       {
 185         wxShape *constrainedObject = (wxShape *)node->GetData();
 186
 187         double width2, height2;
 188         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 189         totalObjectHeight += height2;
 190         node = node->GetNext();
 191       }
 192       double startY;
 193       double spacingY;
 194       // Check if within the constraining object...
 195       if ((totalObjectHeight + (n + 1)*m_ySpacing) <= minHeight)
 196       {
 197         spacingY = (double)((minHeight - totalObjectHeight)/(n + 1));
 198         startY = (double)(y - (minHeight/2.0));
 199       }
 200       // Otherwise, use default spacing
 201       else
 202       {
 203         spacingY = m_ySpacing;
 204         startY = (double)(y - ((totalObjectHeight + (n+1)*spacingY)/2.0));
 205       }
 206
 207       // Now position the objects
 208       bool changed = FALSE;
 209       node = m_constrainedObjects.GetFirst();
 210       while (node)
 211       {
 212         wxShape *constrainedObject = (wxShape *)node->GetData();
 213         double width2, height2;
 214         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 215         startY += (double)(spacingY + (height2/2.0));
 216         if (!Equals(startY, constrainedObject->GetY()))
 217         {
 218           constrainedObject->Move(dc, constrainedObject->GetX(), startY, FALSE);
 219           changed = TRUE;
 220         }
 221         startY += (double)(height2/2.0);
 222         node = node->GetNext();
 223       }
 224       return changed;
 225     }
 226     case gyCONSTRAINT_CENTRED_HORIZONTALLY:
 227     {
 228       int n = m_constrainedObjects.GetCount();
 229       double totalObjectWidth = 0.0;
 230       wxNode *node = m_constrainedObjects.GetFirst();
 231       while (node)
 232       {
 233         wxShape *constrainedObject = (wxShape *)node->GetData();
 234
 235         double width2, height2;
 236         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 237         totalObjectWidth += width2;
 238         node = node->GetNext();
 239       }
 240       double startX;
 241       double spacingX;
 242       // Check if within the constraining object...
 243       if ((totalObjectWidth + (n + 1)*m_xSpacing) <= minWidth)
 244       {
 245         spacingX = (double)((minWidth - totalObjectWidth)/(n + 1));
 246         startX = (double)(x - (minWidth/2.0));
 247       }
 248       // Otherwise, use default spacing
 249       else
 250       {
 251         spacingX = m_xSpacing;
 252         startX = (double)(x - ((totalObjectWidth + (n+1)*spacingX)/2.0));
 253       }
 254
 255       // Now position the objects
 256       bool changed = FALSE;
 257       node = m_constrainedObjects.GetFirst();
 258       while (node)
 259       {
 260         wxShape *constrainedObject = (wxShape *)node->GetData();
 261         double width2, height2;
 262         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 263         startX += (double)(spacingX + (width2/2.0));
 264         if (!Equals(startX, constrainedObject->GetX()))
 265         {
 266           constrainedObject->Move(dc, startX, constrainedObject->GetY(), FALSE);
 267           changed = TRUE;
 268         }
 269         startX += (double)(width2/2.0);
 270         node = node->GetNext();
 271       }
 272       return changed;
 273     }
 274     case gyCONSTRAINT_CENTRED_BOTH:
 275     {
 276       int n = m_constrainedObjects.GetCount();
 277       double totalObjectWidth = 0.0;
 278       double totalObjectHeight = 0.0;
 279       wxNode *node = m_constrainedObjects.GetFirst();
 280       while (node)
 281       {
 282         wxShape *constrainedObject = (wxShape *)node->GetData();
 283
 284         double width2, height2;
 285         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 286         totalObjectWidth += width2;
 287         totalObjectHeight += height2;
 288         node = node->GetNext();
 289       }
 290       double startX;
 291       double spacingX;
 292       double startY;
 293       double spacingY;
 294
 295       // Check if within the constraining object...
 296       if ((totalObjectWidth + (n + 1)*m_xSpacing) <= minWidth)
 297       {
 298         spacingX = (double)((minWidth - totalObjectWidth)/(n + 1));
 299         startX = (double)(x - (minWidth/2.0));
 300       }
 301       // Otherwise, use default spacing
 302       else
 303       {
 304         spacingX = m_xSpacing;
 305         startX = (double)(x - ((totalObjectWidth + (n+1)*spacingX)/2.0));
 306       }
 307
 308       // Check if within the constraining object...
 309       if ((totalObjectHeight + (n + 1)*m_ySpacing) <= minHeight)
 310       {
 311         spacingY = (double)((minHeight - totalObjectHeight)/(n + 1));
 312         startY = (double)(y - (minHeight/2.0));
 313       }
 314       // Otherwise, use default spacing
 315       else
 316       {
 317         spacingY = m_ySpacing;
 318         startY = (double)(y - ((totalObjectHeight + (n+1)*spacingY)/2.0));
 319       }
 320
 321       // Now position the objects
 322       bool changed = FALSE;
 323       node = m_constrainedObjects.GetFirst();
 324       while (node)
 325       {
 326         wxShape *constrainedObject = (wxShape *)node->GetData();
 327         double width2, height2;
 328         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 329         startX += (double)(spacingX + (width2/2.0));
 330         startY += (double)(spacingY + (height2/2.0));
 331
 332         if ((!Equals(startX, constrainedObject->GetX())) || (!Equals(startY, constrainedObject->GetY())))
 333             {
 334           constrainedObject->Move(dc, startX, startY, FALSE);
 335           changed = TRUE;
 336             }
 337
 338         startX += (double)(width2/2.0);
 339         startY += (double)(height2/2.0);
 340
 341         node = node->GetNext();
 342       }
 343       return changed;
 344     }
 345     case gyCONSTRAINT_LEFT_OF:
 346     {
 347       bool changed = FALSE;
 348
 349       wxNode *node = m_constrainedObjects.GetFirst();
 350       while (node)
 351       {
 352         wxShape *constrainedObject = (wxShape *)node->GetData();
 353
 354         double width2, height2;
 355         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 356
 357         double x3 = (double)(x - (minWidth/2.0) - (width2/2.0) - m_xSpacing);
 358         if (!Equals(x3, constrainedObject->GetX()))
 359             {
 360           changed = TRUE;
 361           constrainedObject->Move(dc, x3, constrainedObject->GetY(), FALSE);
 362             }
 363
 364         node = node->GetNext();
 365       }
 366       return changed;
 367     }
 368     case gyCONSTRAINT_RIGHT_OF:
 369     {
 370       bool changed = FALSE;
 371
 372       wxNode *node = m_constrainedObjects.GetFirst();
 373       while (node)
 374       {
 375         wxShape *constrainedObject = (wxShape *)node->GetData();
 376
 377         double width2, height2;
 378         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 379
 380         double x3 = (double)(x + (minWidth/2.0) + (width2/2.0) + m_xSpacing);
 381         if (!Equals(x3, constrainedObject->GetX()))
 382             {
 383           changed = TRUE;
 384           constrainedObject->Move(dc, x3, constrainedObject->GetY(), FALSE);
 385             }
 386
 387         node = node->GetNext();
 388       }
 389       return changed;
 390
 391       return FALSE;
 392     }
 393     case gyCONSTRAINT_ABOVE:
 394     {
 395       bool changed = FALSE;
 396
 397       wxNode *node = m_constrainedObjects.GetFirst();
 398       while (node)
 399       {
 400         wxShape *constrainedObject = (wxShape *)node->GetData();
 401
 402         double width2, height2;
 403         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 404
 405         double y3 = (double)(y - (minHeight/2.0) - (height2/2.0) - m_ySpacing);
 406         if (!Equals(y3, constrainedObject->GetY()))
 407             {
 408           changed = TRUE;
 409           constrainedObject->Move(dc, constrainedObject->GetX(), y3, FALSE);
 410             }
 411
 412         node = node->GetNext();
 413       }
 414       return changed;
 415     }
 416     case gyCONSTRAINT_BELOW:
 417     {
 418       bool changed = FALSE;
 419
 420       wxNode *node = m_constrainedObjects.GetFirst();
 421       while (node)
 422       {
 423         wxShape *constrainedObject = (wxShape *)node->GetData();
 424
 425         double width2, height2;
 426         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 427
 428         double y3 = (double)(y + (minHeight/2.0) + (height2/2.0) + m_ySpacing);
 429         if (!Equals(y3, constrainedObject->GetY()))
 430             {
 431           changed = TRUE;
 432           constrainedObject->Move(dc, constrainedObject->GetX(), y3, FALSE);
 433             }
 434
 435         node = node->GetNext();
 436       }
 437       return changed;
 438     }
 439     case gyCONSTRAINT_ALIGNED_LEFT:
 440     {
 441       bool changed = FALSE;
 442
 443       wxNode *node = m_constrainedObjects.GetFirst();
 444       while (node)
 445       {
 446         wxShape *constrainedObject = (wxShape *)node->GetData();
 447
 448         double width2, height2;
 449         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 450
 451         double x3 = (double)(x - (minWidth/2.0) + (width2/2.0) + m_xSpacing);
 452         if (!Equals(x3, constrainedObject->GetX()))
 453             {
 454           changed = TRUE;
 455           constrainedObject->Move(dc, x3, constrainedObject->GetY(), FALSE);
 456             }
 457
 458         node = node->GetNext();
 459       }
 460       return changed;
 461     }
 462     case gyCONSTRAINT_ALIGNED_RIGHT:
 463     {
 464       bool changed = FALSE;
 465
 466       wxNode *node = m_constrainedObjects.GetFirst();
 467       while (node)
 468       {
 469         wxShape *constrainedObject = (wxShape *)node->GetData();
 470
 471         double width2, height2;
 472         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 473
 474         double x3 = (double)(x + (minWidth/2.0) - (width2/2.0) - m_xSpacing);
 475         if (!Equals(x3, constrainedObject->GetX()))
 476             {
 477           changed = TRUE;
 478           constrainedObject->Move(dc, x3, constrainedObject->GetY(), FALSE);
 479             }
 480
 481         node = node->GetNext();
 482       }
 483       return changed;
 484
 485       return FALSE;
 486     }
 487     case gyCONSTRAINT_ALIGNED_TOP:
 488     {
 489       bool changed = FALSE;
 490
 491       wxNode *node = m_constrainedObjects.GetFirst();
 492       while (node)
 493       {
 494         wxShape *constrainedObject = (wxShape *)node->GetData();
 495
 496         double width2, height2;
 497         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 498
 499         double y3 = (double)(y - (minHeight/2.0) + (height2/2.0) + m_ySpacing);
 500         if (!Equals(y3, constrainedObject->GetY()))
 501             {
 502           changed = TRUE;
 503           constrainedObject->Move(dc, constrainedObject->GetX(), y3, FALSE);
 504             }
 505
 506         node = node->GetNext();
 507       }
 508       return changed;
 509     }
 510     case gyCONSTRAINT_ALIGNED_BOTTOM:
 511     {
 512       bool changed = FALSE;
 513
 514       wxNode *node = m_constrainedObjects.GetFirst();
 515       while (node)
 516       {
 517         wxShape *constrainedObject = (wxShape *)node->GetData();
 518
 519         double width2, height2;
 520         constrainedObject->GetBoundingBoxMax(&width2, &height2);
 521
 522         double y3 = (double)(y + (minHeight/2.0) - (height2/2.0) - m_ySpacing);
 523         if (!Equals(y3, constrainedObject->GetY()))
 524             {
 525           changed = TRUE;
 526           constrainedObject->Move(dc, constrainedObject->GetX(), y3, FALSE);
 527             }
 528
 529         node = node->GetNext();
 530       }
 531       return changed;
 532     }
 533     case gyCONSTRAINT_MIDALIGNED_LEFT:
 534     {
 535       bool changed = FALSE;
 536
 537       wxNode *node = m_constrainedObjects.GetFirst();
 538       while (node)
 539       {
 540         wxShape *constrainedObject = (wxShape *)node->GetData();
 541
 542         double x3 = (double)(x - (minWidth/2.0));
 543         if (!Equals(x3, constrainedObject->GetX()))
 544             {
 545           changed = TRUE;
 546           constrainedObject->Move(dc, x3, constrainedObject->GetY(), FALSE);
 547             }
 548
 549         node = node->GetNext();
 550       }
 551       return changed;
 552     }
 553     case gyCONSTRAINT_MIDALIGNED_RIGHT:
 554     {
 555       bool changed = FALSE;
 556
 557       wxNode *node = m_constrainedObjects.GetFirst();
 558       while (node)
 559       {
 560         wxShape *constrainedObject = (wxShape *)node->GetData();
 561
 562         double x3 = (double)(x + (minWidth/2.0));
 563         if (!Equals(x3, constrainedObject->GetX()))
 564             {
 565           changed = TRUE;
 566           constrainedObject->Move(dc, x3, constrainedObject->GetY(), FALSE);
 567             }
 568
 569         node = node->GetNext();
 570       }
 571       return changed;
 572
 573       return FALSE;
 574     }
 575     case gyCONSTRAINT_MIDALIGNED_TOP:
 576     {
 577       bool changed = FALSE;
 578
 579       wxNode *node = m_constrainedObjects.GetFirst();
 580       while (node)
 581       {
 582         wxShape *constrainedObject = (wxShape *)node->GetData();
 583
 584         double y3 = (double)(y - (minHeight/2.0));
 585         if (!Equals(y3, constrainedObject->GetY()))
 586             {
 587           changed = TRUE;
 588           constrainedObject->Move(dc, constrainedObject->GetX(), y3, FALSE);
 589             }
 590
 591         node = node->GetNext();
 592       }
 593       return changed;
 594     }
 595     case gyCONSTRAINT_MIDALIGNED_BOTTOM:
 596     {
 597       bool changed = FALSE;
 598
 599       wxNode *node = m_constrainedObjects.GetFirst();
 600       while (node)
 601       {
 602         wxShape *constrainedObject = (wxShape *)node->GetData();
 603
 604         double y3 = (double)(y + (minHeight/2.0));
 605         if (!Equals(y3, constrainedObject->GetY()))
 606             {
 607           changed = TRUE;
 608           constrainedObject->Move(dc, constrainedObject->GetX(), y3, FALSE);
 609             }
 610
 611         node = node->GetNext();
 612       }
 613       return changed;
 614     }
 615
 616     default:
 617       return FALSE;
 618   }
 619   return FALSE;
 620 }
 621