utils/ogl/src/divided.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        divided.cpp
   3 // Purpose:     wxDividedShape class
   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 "divided.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 #include <wx/wxexpr.h>
  28
  29 #include "basic.h"
  30 #include "basicp.h"
  31 #include "canvas.h"
  32 #include "divided.h"
  33 #include "lines.h"
  34 #include "misc.h"
  35
  36 class wxDividedShapeControlPoint: public wxControlPoint
  37 {
  38  DECLARE_DYNAMIC_CLASS(wxDividedShapeControlPoint)
  39  private:
  40   int regionId;
  41  public:
  42   wxDividedShapeControlPoint() { regionId = 0; }
  43   wxDividedShapeControlPoint(wxShapeCanvas *the_canvas, wxShape *object, int region,
  44                             double size, double the_xoffset, double the_yoffset, int the_type);
  45   ~wxDividedShapeControlPoint();
  46
  47   void OnDragLeft(bool draw, double x, double y, int keys=0, int attachment = 0);
  48   void OnBeginDragLeft(double x, double y, int keys=0, int attachment = 0);
  49   void OnEndDragLeft(double x, double y, int keys=0, int attachment = 0);
  50 };
  51
  52 IMPLEMENT_DYNAMIC_CLASS(wxDividedShapeControlPoint, wxControlPoint)
  53
  54 /*
  55  * Divided object
  56  *
  57  */
  58
  59 IMPLEMENT_DYNAMIC_CLASS(wxDividedShape, wxRectangleShape)
  60
  61 wxDividedShape::wxDividedShape(double w, double h): wxRectangleShape(w, h)
  62 {
  63   ClearRegions();
  64 }
  65
  66 wxDividedShape::~wxDividedShape()
  67 {
  68 }
  69
  70 void wxDividedShape::OnDraw(wxDC& dc)
  71 {
  72   wxRectangleShape::OnDraw(dc);
  73 }
  74
  75 void wxDividedShape::OnDrawContents(wxDC& dc)
  76 {
  77   double defaultProportion = (double)(GetRegions().Number() > 0 ? (1.0/((double)(GetRegions().Number()))) : 0.0);
  78   double currentY = (double)(m_ypos - (m_height / 2.0));
  79   double maxY = (double)(m_ypos + (m_height / 2.0));
  80
  81   double leftX = (double)(m_xpos - (m_width / 2.0));
  82   double rightX = (double)(m_xpos + (m_width / 2.0));
  83
  84   if (m_pen) dc.SetPen(* m_pen);
  85
  86   if (m_textColour) dc.SetTextForeground(* m_textColour);
  87
  88 #ifdef __WXMSW__
  89   // For efficiency, don't do this under X - doesn't make
  90   // any visible difference for our purposes.
  91   if (m_brush)
  92     dc.SetTextBackground(m_brush->GetColour());
  93 #endif
  94 /*
  95   if (!formatted)
  96   {
  97     FormatRegionText();
  98     formatted = TRUE;
  99   }
 100 */
 101   if (GetDisableLabel()) return;
 102
 103   double xMargin = 2;
 104   double yMargin = 2;
 105   dc.SetBackgroundMode(wxTRANSPARENT);
 106
 107   wxNode *node = GetRegions().First();
 108   while (node)
 109   {
 110     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 111     dc.SetFont(* region->GetFont());
 112     dc.SetTextForeground(* region->GetActualColourObject());
 113
 114     double proportion =
 115       region->m_regionProportionY < 0.0 ? defaultProportion : region->m_regionProportionY;
 116
 117     double y = currentY + m_height*proportion;
 118     double actualY = maxY < y ? maxY : y;
 119
 120     double centreX = m_xpos;
 121     double centreY = (double)(currentY + (actualY - currentY)/2.0);
 122
 123     oglDrawFormattedText(dc, &region->m_formattedText,
 124              (double)(centreX), (double)(centreY), (double)(m_width-2*xMargin), (double)(actualY - currentY - 2*yMargin),
 125              region->m_formatMode);
 126     if ((y <= maxY) && (node->Next()))
 127     {
 128       wxPen *regionPen = region->GetActualPen();
 129       if (regionPen)
 130       {
 131         dc.SetPen(* regionPen);
 132         dc.DrawLine(WXROUND(leftX), WXROUND(y), WXROUND(rightX), WXROUND(y));
 133       }
 134     }
 135
 136     currentY = actualY;
 137
 138     node = node->Next();
 139   }
 140 }
 141
 142 void wxDividedShape::SetSize(double w, double h, bool recursive)
 143 {
 144   SetAttachmentSize(w, h);
 145   m_width = w;
 146   m_height = h;
 147   SetRegionSizes();
 148 }
 149
 150 void wxDividedShape::SetRegionSizes()
 151 {
 152   if (GetRegions().Number() == 0)
 153     return;
 154
 155   double defaultProportion = (double)(GetRegions().Number() > 0 ? (1.0/((double)(GetRegions().Number()))) : 0.0);
 156   double currentY = (double)(m_ypos - (m_height / 2.0));
 157   double maxY = (double)(m_ypos + (m_height / 2.0));
 158
 159 //  double leftX = (double)(m_xpos - (m_width / 2.0));
 160 //  double rightX = (double)(m_xpos + (m_width / 2.0));
 161
 162   wxNode *node = GetRegions().First();
 163   while (node)
 164   {
 165     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 166     double proportion =
 167       region->m_regionProportionY <= 0.0 ? defaultProportion : region->m_regionProportionY;
 168
 169     double sizeY = (double)proportion*m_height;
 170     double y = currentY + sizeY;
 171     double actualY = maxY < y ? maxY : y;
 172
 173     double centreY = (double)(currentY + (actualY - currentY)/2.0);
 174
 175     region->SetSize(m_width, sizeY);
 176     region->SetPosition(0.0, (double)(centreY - m_ypos));
 177     currentY = actualY;
 178     node = node->Next();
 179   }
 180 }
 181
 182 // Attachment points correspond to regions in the divided box
 183 bool wxDividedShape::GetAttachmentPosition(int attachment, double *x, double *y, int nth, int no_arcs,
 184   wxLineShape *line)
 185 {
 186   int totalNumberAttachments = (GetRegions().Number() * 2) + 2;
 187   if ((GetAttachmentMode() == ATTACHMENT_MODE_NONE) || (attachment >= totalNumberAttachments))
 188   {
 189     return wxShape::GetAttachmentPosition(attachment, x, y, nth, no_arcs);
 190   }
 191
 192   int n = GetRegions().Number();
 193   bool isEnd = (line && line->IsEnd(this));
 194
 195   double left = (double)(m_xpos - m_width/2.0);
 196   double right = (double)(m_xpos + m_width/2.0);
 197   double top = (double)(m_ypos - m_height/2.0);
 198   double bottom = (double)(m_ypos + m_height/2.0);
 199
 200   // Zero is top, n+1 is bottom.
 201   if (attachment == 0)
 202   {
 203     *y = top;
 204     if (m_spaceAttachments)
 205     {
 206       if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 207       {
 208         // Align line according to the next handle along
 209         wxRealPoint *point = line->GetNextControlPoint(this);
 210         if (point->x < left)
 211           *x = left;
 212         else if (point->x > right)
 213           *x = right;
 214         else
 215           *x = point->x;
 216       }
 217       else
 218         *x = left + (nth + 1)*m_width/(no_arcs + 1);
 219     }
 220     else
 221       *x = m_xpos;
 222   }
 223   else if (attachment == (n+1))
 224   {
 225     *y = bottom;
 226     if (m_spaceAttachments)
 227     {
 228       if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 229       {
 230         // Align line according to the next handle along
 231         wxRealPoint *point = line->GetNextControlPoint(this);
 232         if (point->x < left)
 233           *x = left;
 234         else if (point->x > right)
 235           *x = right;
 236         else
 237           *x = point->x;
 238       }
 239       else
 240         *x = left + (nth + 1)*m_width/(no_arcs + 1);
 241     }
 242     else
 243       *x = m_xpos;
 244   }
 245   // Left or right.
 246   else
 247   {
 248     int i = 0;
 249     bool isLeft = FALSE;
 250     if (attachment < (n+1))
 251     {
 252       i = attachment-1;
 253       isLeft = FALSE;
 254     }
 255     else
 256     {
 257       i = (totalNumberAttachments - attachment - 1);
 258       isLeft = TRUE;
 259     }
 260     wxNode *node = GetRegions().Nth(i);
 261     if (node)
 262     {
 263       wxShapeRegion *region = (wxShapeRegion *)node->Data();
 264
 265       if (isLeft)
 266         *x = left;
 267       else
 268         *x = right;
 269
 270       // Calculate top and bottom of region
 271       top = (double)((m_ypos + region->m_y) - (region->m_height/2.0));
 272       bottom = (double)((m_ypos + region->m_y) + (region->m_height/2.0));
 273
 274       // Assuming we can trust the absolute size and
 275       // position of these regions...
 276       if (m_spaceAttachments)
 277       {
 278         if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 279         {
 280           // Align line according to the next handle along
 281           wxRealPoint *point = line->GetNextControlPoint(this);
 282           if (point->y < bottom)
 283             *y = bottom;
 284           else if (point->y > top)
 285             *y = top;
 286           else
 287             *y = point->y;
 288         }
 289         else
 290 //          *y = (double)(((m_ypos + region->m_y) - (region->m_height/2.0)) + (nth + 1)*region->m_height/(no_arcs+1));
 291           *y = (double)(top + (nth + 1)*region->m_height/(no_arcs+1));
 292       }
 293       else
 294         *y = (double)(m_ypos + region->m_y);
 295     }
 296     else
 297     {
 298       *x = m_xpos;
 299       *y = m_ypos;
 300       return FALSE;
 301     }
 302   }
 303   return TRUE;
 304 }
 305
 306 int wxDividedShape::GetNumberOfAttachments() const
 307 {
 308   // There are two attachments for each region (left and right),
 309   // plus one on the top and one on the bottom.
 310   int n = (GetRegions().Number() * 2) + 2;
 311
 312   int maxN = n - 1;
 313   wxNode *node = m_attachmentPoints.First();
 314   while (node)
 315   {
 316     wxAttachmentPoint *point = (wxAttachmentPoint *)node->Data();
 317     if (point->m_id > maxN)
 318       maxN = point->m_id;
 319     node = node->Next();
 320   }
 321   return maxN + 1;
 322 }
 323
 324 bool wxDividedShape::AttachmentIsValid(int attachment)
 325 {
 326   int totalNumberAttachments = (GetRegions().Number() * 2) + 2;
 327   if (attachment >= totalNumberAttachments)
 328   {
 329     return wxShape::AttachmentIsValid(attachment);
 330   }
 331   else if (attachment >= 0)
 332     return TRUE;
 333   else
 334     return FALSE;
 335 }
 336
 337 void wxDividedShape::Copy(wxShape& copy)
 338 {
 339   wxRectangleShape::Copy(copy);
 340 }
 341
 342 // Region operations
 343
 344 void wxDividedShape::MakeControlPoints()
 345 {
 346   wxRectangleShape::MakeControlPoints();
 347
 348   MakeMandatoryControlPoints();
 349 }
 350
 351 void wxDividedShape::MakeMandatoryControlPoints()
 352 {
 353   double currentY = (double)(GetY() - (m_height / 2.0));
 354   double maxY = (double)(GetY() + (m_height / 2.0));
 355
 356   wxNode *node = GetRegions().First();
 357   int i = 0;
 358   while (node)
 359   {
 360     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 361
 362     double proportion = region->m_regionProportionY;
 363
 364     double y = currentY + m_height*proportion;
 365     double actualY = (double)(maxY < y ? maxY : y);
 366
 367     if (node->Next())
 368     {
 369       wxDividedShapeControlPoint *controlPoint =
 370         new wxDividedShapeControlPoint(m_canvas, this, i, CONTROL_POINT_SIZE, 0.0, (double)(actualY - GetY()), 0);
 371       m_canvas->AddShape(controlPoint);
 372       m_controlPoints.Append(controlPoint);
 373     }
 374     currentY = actualY;
 375     i ++;
 376     node = node->Next();
 377   }
 378 }
 379
 380 void wxDividedShape::ResetControlPoints()
 381 {
 382   // May only have the region handles, (n - 1) of them.
 383   if (m_controlPoints.Number() > (GetRegions().Number() - 1))
 384     wxRectangleShape::ResetControlPoints();
 385
 386   ResetMandatoryControlPoints();
 387 }
 388
 389 void wxDividedShape::ResetMandatoryControlPoints()
 390 {
 391   double currentY = (double)(GetY() - (m_height / 2.0));
 392   double maxY = (double)(GetY() + (m_height / 2.0));
 393
 394   wxNode *node = m_controlPoints.First();
 395   int i = 0;
 396   while (node)
 397   {
 398     wxControlPoint *controlPoint = (wxControlPoint *)node->Data();
 399     if (controlPoint->IsKindOf(CLASSINFO(wxDividedShapeControlPoint)))
 400     {
 401       wxNode *node1 = GetRegions().Nth(i);
 402       wxShapeRegion *region = (wxShapeRegion *)node1->Data();
 403
 404       double proportion = region->m_regionProportionY;
 405
 406       double y = currentY + m_height*proportion;
 407       double actualY = (double)(maxY < y ? maxY : y);
 408
 409       controlPoint->m_xoffset = 0.0;
 410       controlPoint->m_yoffset = (double)(actualY - GetY());
 411       currentY = actualY;
 412       i ++;
 413     }
 414     node = node->Next();
 415   }
 416 }
 417
 418 #ifdef PROLOGIO
 419 void wxDividedShape::WriteAttributes(wxExpr *clause)
 420 {
 421   wxRectangleShape::WriteAttributes(clause);
 422 }
 423
 424 void wxDividedShape::ReadAttributes(wxExpr *clause)
 425 {
 426   wxRectangleShape::ReadAttributes(clause);
 427 }
 428 #endif
 429
 430 /*
 431  * Edit the division colour/style
 432  *
 433  */
 434
 435 void wxDividedShape::EditRegions()
 436 {
 437   wxMessageBox("EditRegions() is unimplemented.", "OGL", wxOK);
 438
 439   // TODO
 440 #if 0
 441   if (GetRegions().Number() < 2)
 442     return;
 443
 444   wxBeginBusyCursor();
 445
 446   GraphicsForm *form = new GraphicsForm("Divided nodes");
 447   // Need an array to store all the style strings,
 448   // since they need to be converted to integers
 449   char **styleStrings = new char *[GetRegions().Number()];
 450   for (int j = 0; j < GetRegions().Number(); j++)
 451     styleStrings[j] = NULL;
 452
 453   int i = 0;
 454   wxNode *node = GetRegions().First();
 455   while (node && node->Next())
 456   {
 457     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 458     char buf[50];
 459     sprintf(buf, "Region %d", (i+1));
 460     form->Add(wxMakeFormMessage(buf));
 461     form->Add(wxMakeFormNewLine());
 462
 463     form->Add(wxMakeFormString("Colour", &region->penColour, wxFORM_CHOICE,
 464               new wxList(wxMakeConstraintStrings(
 465     "Invisible"        ,
 466     "BLACK"            ,
 467     "BLUE"             ,
 468     "BROWN"            ,
 469     "CORAL"            ,
 470     "CYAN"             ,
 471     "DARK GREY"        ,
 472     "DARK GREEN"       ,
 473     "DIM GREY"         ,
 474     "GREY"             ,
 475     "GREEN"            ,
 476     "LIGHT BLUE"       ,
 477     "LIGHT GREY"       ,
 478     "MAGENTA"          ,
 479     "MAROON"           ,
 480     "NAVY"             ,
 481     "ORANGE"           ,
 482     "PURPLE"           ,
 483     "RED"              ,
 484     "TURQUOISE"        ,
 485     "VIOLET"           ,
 486     "WHITE"            ,
 487     "YELLOW"           ,
 488     NULL),
 489     NULL), NULL, wxVERTICAL, 150));
 490
 491     char *styleString = NULL;
 492     switch (region->penStyle)
 493     {
 494       case wxSHORT_DASH:
 495         styleString = "Short Dash";
 496         break;
 497       case wxLONG_DASH:
 498         styleString = "Long Dash";
 499         break;
 500       case wxDOT:
 501         styleString = "Dot";
 502         break;
 503       case wxDOT_DASH:
 504         styleString = "Dot Dash";
 505         break;
 506       case wxSOLID:
 507       default:
 508         styleString = "Solid";
 509         break;
 510     }
 511     styleStrings[i] = copystring(styleString);
 512     form->Add(wxMakeFormString("Style", &(styleStrings[i]), wxFORM_CHOICE,
 513               new wxList(wxMakeConstraintStrings(
 514     "Solid"            ,
 515     "Short Dash"       ,
 516     "Long Dash"        ,
 517     "Dot"              ,
 518     "Dot Dash"         ,
 519     NULL),
 520     NULL), NULL, wxVERTICAL, 100));
 521     node = node->Next();
 522     i ++;
 523     if (node && node->Next())
 524       form->Add(wxMakeFormNewLine());
 525   }
 526   wxDialogBox *dialog = new wxDialogBox(m_canvas->GetParent(), "Divided object properties", 10, 10, 500, 500);
 527   if (GraphicsLabelFont)
 528     dialog->SetLabelFont(GraphicsLabelFont);
 529   if (GraphicsButtonFont)
 530     dialog->SetButtonFont(GraphicsButtonFont);
 531   form->AssociatePanel(dialog);
 532   form->dialog = dialog;
 533
 534   dialog->Fit();
 535   dialog->Centre(wxBOTH);
 536
 537   wxEndBusyCursor();
 538
 539   dialog->Show(TRUE);
 540
 541   node = GetRegions().First();
 542   i = 0;
 543   while (node)
 544   {
 545     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 546
 547     if (styleStrings[i])
 548     {
 549       if (strcmp(styleStrings[i], "Solid") == 0)
 550         region->penStyle = wxSOLID;
 551       else if (strcmp(styleStrings[i], "Dot") == 0)
 552         region->penStyle = wxDOT;
 553       else if (strcmp(styleStrings[i], "Short Dash") == 0)
 554         region->penStyle = wxSHORT_DASH;
 555       else if (strcmp(styleStrings[i], "Long Dash") == 0)
 556         region->penStyle = wxLONG_DASH;
 557       else if (strcmp(styleStrings[i], "Dot Dash") == 0)
 558         region->penStyle = wxDOT_DASH;
 559       delete[] styleStrings[i];
 560     }
 561     region->m_actualPenObject = NULL;
 562     node = node->Next();
 563     i ++;
 564   }
 565   delete[] styleStrings;
 566   Draw(dc);
 567 #endif
 568 }
 569
 570 void wxDividedShape::OnRightClick(double x, double y, int keys, int attachment)
 571 {
 572   if (keys & KEY_CTRL)
 573   {
 574     EditRegions();
 575   }
 576   else
 577   {
 578     wxRectangleShape::OnRightClick(x, y, keys, attachment);
 579   }
 580 }
 581
 582 wxDividedShapeControlPoint::wxDividedShapeControlPoint(wxShapeCanvas *the_canvas, wxShape *object,
 583   int region, double size, double the_m_xoffset, double the_m_yoffset, int the_type):
 584     wxControlPoint(the_canvas, object, size, the_m_xoffset, the_m_yoffset, the_type)
 585 {
 586   regionId = region;
 587 }
 588
 589 wxDividedShapeControlPoint::~wxDividedShapeControlPoint()
 590 {
 591 }
 592
 593 // Implement resizing of divided object division
 594 void wxDividedShapeControlPoint::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
 595 {
 596     wxClientDC dc(GetCanvas());
 597     GetCanvas()->PrepareDC(dc);
 598
 599     dc.SetLogicalFunction(OGLRBLF);
 600     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 601     dc.SetPen(dottedPen);
 602     dc.SetBrush((* wxTRANSPARENT_BRUSH));
 603
 604     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 605     double x1 = (double)(dividedObject->GetX() - (dividedObject->GetWidth()/2.0));
 606     double y1 = y;
 607     double x2 = (double)(dividedObject->GetX() + (dividedObject->GetWidth()/2.0));
 608     double y2 = y;
 609     dc.DrawLine(WXROUND(x1), WXROUND(y1), WXROUND(x2), WXROUND(y2));
 610 }
 611
 612 void wxDividedShapeControlPoint::OnBeginDragLeft(double x, double y, int keys, int attachment)
 613 {
 614     wxClientDC dc(GetCanvas());
 615     GetCanvas()->PrepareDC(dc);
 616
 617     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 618     dc.SetLogicalFunction(OGLRBLF);
 619     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 620     dc.SetPen(dottedPen);
 621     dc.SetBrush((* wxTRANSPARENT_BRUSH));
 622
 623     double x1 = (double)(dividedObject->GetX() - (dividedObject->GetWidth()/2.0));
 624     double y1 = y;
 625     double x2 = (double)(dividedObject->GetX() + (dividedObject->GetWidth()/2.0));
 626     double y2 = y;
 627     dc.DrawLine(WXROUND(x1), WXROUND(y1), WXROUND(x2), WXROUND(y2));
 628     m_canvas->CaptureMouse();
 629 }
 630
 631 void wxDividedShapeControlPoint::OnEndDragLeft(double x, double y, int keys, int attachment)
 632 {
 633     wxClientDC dc(GetCanvas());
 634     GetCanvas()->PrepareDC(dc);
 635
 636     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 637     wxNode *node = dividedObject->GetRegions().Nth(regionId);
 638     if (!node)
 639     return;
 640
 641     wxShapeRegion *thisRegion = (wxShapeRegion *)node->Data();
 642     wxShapeRegion *nextRegion = NULL; // Region below this one
 643
 644     dc.SetLogicalFunction(wxCOPY);
 645
 646     m_canvas->ReleaseMouse();
 647
 648     // Find the old top and bottom of this region,
 649     // and calculate the new proportion for this region
 650     // if legal.
 651
 652     double currentY = (double)(dividedObject->GetY() - (dividedObject->GetHeight() / 2.0));
 653     double maxY = (double)(dividedObject->GetY() + (dividedObject->GetHeight() / 2.0));
 654
 655     // Save values
 656     double thisRegionTop = 0.0;
 657     double thisRegionBottom = 0.0;
 658     double nextRegionBottom = 0.0;
 659
 660     node = dividedObject->GetRegions().First();
 661     while (node)
 662     {
 663       wxShapeRegion *region = (wxShapeRegion *)node->Data();
 664
 665       double proportion = region->m_regionProportionY;
 666       double yy = currentY + (dividedObject->GetHeight()*proportion);
 667       double actualY = (double)(maxY < yy ? maxY : yy);
 668
 669       if (region == thisRegion)
 670       {
 671         thisRegionTop = currentY;
 672         thisRegionBottom = actualY;
 673         if (node->Next())
 674           nextRegion = (wxShapeRegion *)node->Next()->Data();
 675       }
 676       if (region == nextRegion)
 677       {
 678         nextRegionBottom = actualY;
 679       }
 680
 681       currentY = actualY;
 682       node = node->Next();
 683     }
 684     if (!nextRegion)
 685       return;
 686
 687     // Check that we haven't gone above this region or below
 688     // next region.
 689     if ((y <= thisRegionTop) || (y >= nextRegionBottom))
 690     return;
 691
 692     dividedObject->EraseLinks(dc);
 693
 694     // Now calculate the new proportions of this region and the next region.
 695     double thisProportion = (double)((y - thisRegionTop)/dividedObject->GetHeight());
 696     double nextProportion = (double)((nextRegionBottom - y)/dividedObject->GetHeight());
 697     thisRegion->SetProportions(0.0, thisProportion);
 698     nextRegion->SetProportions(0.0, nextProportion);
 699     m_yoffset = (double)(y - dividedObject->GetY());
 700
 701     // Now reformat text
 702     int i = 0;
 703     node = dividedObject->GetRegions().First();
 704     while (node)
 705     {
 706         wxShapeRegion *region = (wxShapeRegion *)node->Data();
 707         if (region->GetText())
 708         {
 709         char *s = copystring(region->GetText());
 710         dividedObject->FormatText(dc, s, i);
 711         delete[] s;
 712         }
 713         node = node->Next();
 714         i++;
 715     }
 716     dividedObject->SetRegionSizes();
 717     dividedObject->Draw(dc);
 718     dividedObject->GetEventHandler()->OnMoveLinks(dc);
 719 }
 720