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 #ifdef PROLOGIO
  28 #include <wx/wxexpr.h>
  29 #endif
  30
  31 #include "basic.h"
  32 #include "basicp.h"
  33 #include "canvas.h"
  34 #include "divided.h"
  35 #include "lines.h"
  36 #include "misc.h"
  37
  38 class wxDividedShapeControlPoint: public wxControlPoint
  39 {
  40  DECLARE_DYNAMIC_CLASS(wxDividedShapeControlPoint)
  41  private:
  42   int regionId;
  43  public:
  44   wxDividedShapeControlPoint() { regionId = 0; }
  45   wxDividedShapeControlPoint(wxShapeCanvas *the_canvas, wxShape *object, int region,
  46                             double size, double the_xoffset, double the_yoffset, int the_type);
  47   ~wxDividedShapeControlPoint();
  48
  49   void OnDragLeft(bool draw, double x, double y, int keys=0, int attachment = 0);
  50   void OnBeginDragLeft(double x, double y, int keys=0, int attachment = 0);
  51   void OnEndDragLeft(double x, double y, int keys=0, int attachment = 0);
  52 };
  53
  54 IMPLEMENT_DYNAMIC_CLASS(wxDividedShapeControlPoint, wxControlPoint)
  55
  56 /*
  57  * Divided object
  58  *
  59  */
  60
  61 IMPLEMENT_DYNAMIC_CLASS(wxDividedShape, wxRectangleShape)
  62
  63 wxDividedShape::wxDividedShape(double w, double h): wxRectangleShape(w, h)
  64 {
  65   ClearRegions();
  66 }
  67
  68 wxDividedShape::~wxDividedShape()
  69 {
  70 }
  71
  72 void wxDividedShape::OnDraw(wxDC& dc)
  73 {
  74   wxRectangleShape::OnDraw(dc);
  75 }
  76
  77 void wxDividedShape::OnDrawContents(wxDC& dc)
  78 {
  79   double defaultProportion = (double)(GetRegions().Number() > 0 ? (1.0/((double)(GetRegions().Number()))) : 0.0);
  80   double currentY = (double)(m_ypos - (m_height / 2.0));
  81   double maxY = (double)(m_ypos + (m_height / 2.0));
  82
  83   double leftX = (double)(m_xpos - (m_width / 2.0));
  84   double rightX = (double)(m_xpos + (m_width / 2.0));
  85
  86   if (m_pen) dc.SetPen(m_pen);
  87
  88   if (m_textColour) dc.SetTextForeground(* m_textColour);
  89
  90 #ifdef __WXMSW__
  91   // For efficiency, don't do this under X - doesn't make
  92   // any visible difference for our purposes.
  93   if (m_brush)
  94     dc.SetTextBackground(m_brush->GetColour());
  95 #endif
  96 /*
  97   if (!formatted)
  98   {
  99     FormatRegionText();
 100     formatted = TRUE;
 101   }
 102 */
 103   if (GetDisableLabel()) return;
 104
 105   double xMargin = 2;
 106   double yMargin = 2;
 107   dc.SetBackgroundMode(wxTRANSPARENT);
 108
 109   wxNode *node = GetRegions().First();
 110   while (node)
 111   {
 112     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 113     dc.SetFont(region->GetFont());
 114     dc.SetTextForeground(* region->GetActualColourObject());
 115
 116     double proportion =
 117       region->m_regionProportionY < 0.0 ? defaultProportion : region->m_regionProportionY;
 118
 119     double y = currentY + m_height*proportion;
 120     double actualY = maxY < y ? maxY : y;
 121
 122     double centreX = m_xpos;
 123     double centreY = (double)(currentY + (actualY - currentY)/2.0);
 124
 125     oglDrawFormattedText(dc, &region->m_formattedText,
 126              (double)(centreX), (double)(centreY), (double)(m_width-2*xMargin), (double)(actualY - currentY - 2*yMargin),
 127              region->m_formatMode);
 128     if ((y <= maxY) && (node->Next()))
 129     {
 130       wxPen *regionPen = region->GetActualPen();
 131       if (regionPen)
 132       {
 133         dc.SetPen(regionPen);
 134         dc.DrawLine(WXROUND(leftX), WXROUND(y), WXROUND(rightX), WXROUND(y));
 135       }
 136     }
 137
 138     currentY = actualY;
 139
 140     node = node->Next();
 141   }
 142 }
 143
 144 void wxDividedShape::SetSize(double w, double h, bool recursive)
 145 {
 146   SetAttachmentSize(w, h);
 147   m_width = w;
 148   m_height = h;
 149   SetRegionSizes();
 150 }
 151
 152 void wxDividedShape::SetRegionSizes()
 153 {
 154   if (GetRegions().Number() == 0)
 155     return;
 156
 157   double defaultProportion = (double)(GetRegions().Number() > 0 ? (1.0/((double)(GetRegions().Number()))) : 0.0);
 158   double currentY = (double)(m_ypos - (m_height / 2.0));
 159   double maxY = (double)(m_ypos + (m_height / 2.0));
 160
 161 //  double leftX = (double)(m_xpos - (m_width / 2.0));
 162 //  double rightX = (double)(m_xpos + (m_width / 2.0));
 163
 164   wxNode *node = GetRegions().First();
 165   while (node)
 166   {
 167     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 168     double proportion =
 169       region->m_regionProportionY <= 0.0 ? defaultProportion : region->m_regionProportionY;
 170
 171     double sizeY = (double)proportion*m_height;
 172     double y = currentY + sizeY;
 173     double actualY = maxY < y ? maxY : y;
 174
 175     double centreY = (double)(currentY + (actualY - currentY)/2.0);
 176
 177     region->SetSize(m_width, sizeY);
 178     region->SetPosition(0.0, (double)(centreY - m_ypos));
 179     currentY = actualY;
 180     node = node->Next();
 181   }
 182 }
 183
 184 // Attachment points correspond to regions in the divided box
 185 bool wxDividedShape::GetAttachmentPosition(int attachment, double *x, double *y, int nth, int no_arcs,
 186   wxLineShape *line)
 187 {
 188   int totalNumberAttachments = (GetRegions().Number() * 2) + 2;
 189   if (!GetAttachmentMode() || (attachment >= totalNumberAttachments))
 190   {
 191     return wxShape::GetAttachmentPosition(attachment, x, y, nth, no_arcs);
 192   }
 193
 194   int n = GetRegions().Number();
 195   bool isEnd = (line && line->IsEnd(this));
 196
 197   double left = (double)(m_xpos - m_width/2.0);
 198   double right = (double)(m_xpos + m_width/2.0);
 199   double top = (double)(m_ypos - m_height/2.0);
 200   double bottom = (double)(m_ypos + m_height/2.0);
 201
 202   // Zero is top, n+1 is bottom.
 203   if (attachment == 0)
 204   {
 205     *y = top;
 206     if (m_spaceAttachments)
 207     {
 208       if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 209       {
 210         // Align line according to the next handle along
 211         wxRealPoint *point = line->GetNextControlPoint(this);
 212         if (point->x < left)
 213           *x = left;
 214         else if (point->x > right)
 215           *x = right;
 216         else
 217           *x = point->x;
 218       }
 219       else
 220         *x = left + (nth + 1)*m_width/(no_arcs + 1);
 221     }
 222     else
 223       *x = m_xpos;
 224   }
 225   else if (attachment == (n+1))
 226   {
 227     *y = bottom;
 228     if (m_spaceAttachments)
 229     {
 230       if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 231       {
 232         // Align line according to the next handle along
 233         wxRealPoint *point = line->GetNextControlPoint(this);
 234         if (point->x < left)
 235           *x = left;
 236         else if (point->x > right)
 237           *x = right;
 238         else
 239           *x = point->x;
 240       }
 241       else
 242         *x = left + (nth + 1)*m_width/(no_arcs + 1);
 243     }
 244     else
 245       *x = m_xpos;
 246   }
 247   // Left or right.
 248   else
 249   {
 250     int i = 0;
 251     bool isLeft = FALSE;
 252     if (attachment < (n+1))
 253     {
 254       i = attachment-1;
 255       isLeft = FALSE;
 256     }
 257     else
 258     {
 259       i = (totalNumberAttachments - attachment - 1);
 260       isLeft = TRUE;
 261     }
 262     wxNode *node = GetRegions().Nth(i);
 263     if (node)
 264     {
 265       wxShapeRegion *region = (wxShapeRegion *)node->Data();
 266
 267       if (isLeft)
 268         *x = left;
 269       else
 270         *x = right;
 271
 272       // Calculate top and bottom of region
 273       top = (double)((m_ypos + region->m_y) - (region->m_height/2.0));
 274       bottom = (double)((m_ypos + region->m_y) + (region->m_height/2.0));
 275
 276       // Assuming we can trust the absolute size and
 277       // position of these regions...
 278       if (m_spaceAttachments)
 279       {
 280         if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 281         {
 282           // Align line according to the next handle along
 283           wxRealPoint *point = line->GetNextControlPoint(this);
 284           if (point->y < bottom)
 285             *y = bottom;
 286           else if (point->y > top)
 287             *y = top;
 288           else
 289             *y = point->y;
 290         }
 291         else
 292 //          *y = (double)(((m_ypos + region->m_y) - (region->m_height/2.0)) + (nth + 1)*region->m_height/(no_arcs+1));
 293           *y = (double)(top + (nth + 1)*region->m_height/(no_arcs+1));
 294       }
 295       else
 296         *y = (double)(m_ypos + region->m_y);
 297     }
 298     else
 299     {
 300       *x = m_xpos;
 301       *y = m_ypos;
 302       return FALSE;
 303     }
 304   }
 305   return TRUE;
 306 }
 307
 308 int wxDividedShape::GetNumberOfAttachments()
 309 {
 310   // There are two attachments for each region (left and right),
 311   // plus one on the top and one on the bottom.
 312   int n = (GetRegions().Number() * 2) + 2;
 313
 314   int maxN = n - 1;
 315   wxNode *node = m_attachmentPoints.First();
 316   while (node)
 317   {
 318     wxAttachmentPoint *point = (wxAttachmentPoint *)node->Data();
 319     if (point->m_id > maxN)
 320       maxN = point->m_id;
 321     node = node->Next();
 322   }
 323   return maxN + 1;
 324 }
 325
 326 bool wxDividedShape::AttachmentIsValid(int attachment)
 327 {
 328   int totalNumberAttachments = (GetRegions().Number() * 2) + 2;
 329   if (attachment >= totalNumberAttachments)
 330   {
 331     return wxShape::AttachmentIsValid(attachment);
 332   }
 333   else if (attachment >= 0)
 334     return TRUE;
 335   else
 336     return FALSE;
 337 }
 338
 339 void wxDividedShape::Copy(wxShape& copy)
 340 {
 341   wxRectangleShape::Copy(copy);
 342 }
 343
 344 // Region operations
 345
 346 void wxDividedShape::MakeControlPoints()
 347 {
 348   wxRectangleShape::MakeControlPoints();
 349
 350   MakeMandatoryControlPoints();
 351 }
 352
 353 void wxDividedShape::MakeMandatoryControlPoints()
 354 {
 355   double currentY = (double)(GetY() - (m_height / 2.0));
 356   double maxY = (double)(GetY() + (m_height / 2.0));
 357
 358   wxNode *node = GetRegions().First();
 359   int i = 0;
 360   while (node)
 361   {
 362     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 363
 364     double proportion = region->m_regionProportionY;
 365
 366     double y = currentY + m_height*proportion;
 367     double actualY = (double)(maxY < y ? maxY : y);
 368
 369     if (node->Next())
 370     {
 371       wxDividedShapeControlPoint *controlPoint =
 372         new wxDividedShapeControlPoint(m_canvas, this, i, CONTROL_POINT_SIZE, 0.0, (double)(actualY - GetY()), 0);
 373       m_canvas->AddShape(controlPoint);
 374       m_controlPoints.Append(controlPoint);
 375     }
 376     currentY = actualY;
 377     i ++;
 378     node = node->Next();
 379   }
 380 }
 381
 382 void wxDividedShape::ResetControlPoints()
 383 {
 384   // May only have the region handles, (n - 1) of them.
 385   if (m_controlPoints.Number() > (GetRegions().Number() - 1))
 386     wxRectangleShape::ResetControlPoints();
 387
 388   ResetMandatoryControlPoints();
 389 }
 390
 391 void wxDividedShape::ResetMandatoryControlPoints()
 392 {
 393   double currentY = (double)(GetY() - (m_height / 2.0));
 394   double maxY = (double)(GetY() + (m_height / 2.0));
 395
 396   wxNode *node = m_controlPoints.First();
 397   int i = 0;
 398   while (node)
 399   {
 400     wxControlPoint *controlPoint = (wxControlPoint *)node->Data();
 401     if (controlPoint->IsKindOf(CLASSINFO(wxDividedShapeControlPoint)))
 402     {
 403       wxNode *node1 = GetRegions().Nth(i);
 404       wxShapeRegion *region = (wxShapeRegion *)node1->Data();
 405
 406       double proportion = region->m_regionProportionY;
 407
 408       double y = currentY + m_height*proportion;
 409       double actualY = (double)(maxY < y ? maxY : y);
 410
 411       controlPoint->m_xoffset = 0.0;
 412       controlPoint->m_yoffset = (double)(actualY - GetY());
 413       currentY = actualY;
 414       i ++;
 415     }
 416     node = node->Next();
 417   }
 418 }
 419
 420 #ifdef PROLOGIO
 421 void wxDividedShape::WritePrologAttributes(wxExpr *clause)
 422 {
 423   wxRectangleShape::WritePrologAttributes(clause);
 424 }
 425
 426 void wxDividedShape::ReadPrologAttributes(wxExpr *clause)
 427 {
 428   wxRectangleShape::ReadPrologAttributes(clause);
 429 }
 430 #endif
 431
 432 /*
 433  * Edit the division colour/style
 434  *
 435  */
 436
 437 void wxDividedShape::EditRegions()
 438 {
 439   wxMessageBox("EditRegions() is unimplemented.", "OGL", wxOK);
 440
 441   // TODO
 442 #if 0
 443   if (GetRegions().Number() < 2)
 444     return;
 445
 446   wxBeginBusyCursor();
 447
 448   GraphicsForm *form = new GraphicsForm("Divided nodes");
 449   // Need an array to store all the style strings,
 450   // since they need to be converted to integers
 451   char **styleStrings = new char *[GetRegions().Number()];
 452   for (int j = 0; j < GetRegions().Number(); j++)
 453     styleStrings[j] = NULL;
 454
 455   int i = 0;
 456   wxNode *node = GetRegions().First();
 457   while (node && node->Next())
 458   {
 459     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 460     char buf[50];
 461     sprintf(buf, "Region %d", (i+1));
 462     form->Add(wxMakeFormMessage(buf));
 463     form->Add(wxMakeFormNewLine());
 464
 465     form->Add(wxMakeFormString("Colour", &region->penColour, wxFORM_CHOICE,
 466               new wxList(wxMakeConstraintStrings(
 467     "Invisible"        ,
 468     "BLACK"            ,
 469     "BLUE"             ,
 470     "BROWN"            ,
 471     "CORAL"            ,
 472     "CYAN"             ,
 473     "DARK GREY"        ,
 474     "DARK GREEN"       ,
 475     "DIM GREY"         ,
 476     "GREY"             ,
 477     "GREEN"            ,
 478     "LIGHT BLUE"       ,
 479     "LIGHT GREY"       ,
 480     "MAGENTA"          ,
 481     "MAROON"           ,
 482     "NAVY"             ,
 483     "ORANGE"           ,
 484     "PURPLE"           ,
 485     "RED"              ,
 486     "TURQUOISE"        ,
 487     "VIOLET"           ,
 488     "WHITE"            ,
 489     "YELLOW"           ,
 490     NULL),
 491     NULL), NULL, wxVERTICAL, 150));
 492
 493     char *styleString = NULL;
 494     switch (region->penStyle)
 495     {
 496       case wxSHORT_DASH:
 497         styleString = "Short Dash";
 498         break;
 499       case wxLONG_DASH:
 500         styleString = "Long Dash";
 501         break;
 502       case wxDOT:
 503         styleString = "Dot";
 504         break;
 505       case wxDOT_DASH:
 506         styleString = "Dot Dash";
 507         break;
 508       case wxSOLID:
 509       default:
 510         styleString = "Solid";
 511         break;
 512     }
 513     styleStrings[i] = copystring(styleString);
 514     form->Add(wxMakeFormString("Style", &(styleStrings[i]), wxFORM_CHOICE,
 515               new wxList(wxMakeConstraintStrings(
 516     "Solid"            ,
 517     "Short Dash"       ,
 518     "Long Dash"        ,
 519     "Dot"              ,
 520     "Dot Dash"         ,
 521     NULL),
 522     NULL), NULL, wxVERTICAL, 100));
 523     node = node->Next();
 524     i ++;
 525     if (node && node->Next())
 526       form->Add(wxMakeFormNewLine());
 527   }
 528   wxDialogBox *dialog = new wxDialogBox(m_canvas->GetParent(), "Divided object properties", 10, 10, 500, 500);
 529   if (GraphicsLabelFont)
 530     dialog->SetLabelFont(GraphicsLabelFont);
 531   if (GraphicsButtonFont)
 532     dialog->SetButtonFont(GraphicsButtonFont);
 533   form->AssociatePanel(dialog);
 534   form->dialog = dialog;
 535
 536   dialog->Fit();
 537   dialog->Centre(wxBOTH);
 538
 539   wxEndBusyCursor();
 540
 541   dialog->Show(TRUE);
 542
 543   node = GetRegions().First();
 544   i = 0;
 545   while (node)
 546   {
 547     wxShapeRegion *region = (wxShapeRegion *)node->Data();
 548
 549     if (styleStrings[i])
 550     {
 551       if (strcmp(styleStrings[i], "Solid") == 0)
 552         region->penStyle = wxSOLID;
 553       else if (strcmp(styleStrings[i], "Dot") == 0)
 554         region->penStyle = wxDOT;
 555       else if (strcmp(styleStrings[i], "Short Dash") == 0)
 556         region->penStyle = wxSHORT_DASH;
 557       else if (strcmp(styleStrings[i], "Long Dash") == 0)
 558         region->penStyle = wxLONG_DASH;
 559       else if (strcmp(styleStrings[i], "Dot Dash") == 0)
 560         region->penStyle = wxDOT_DASH;
 561       delete[] styleStrings[i];
 562     }
 563     region->m_actualPenObject = NULL;
 564     node = node->Next();
 565     i ++;
 566   }
 567   delete[] styleStrings;
 568   Draw(dc);
 569 #endif
 570 }
 571
 572 void wxDividedShape::OnRightClick(double x, double y, int keys, int attachment)
 573 {
 574   if (keys & KEY_CTRL)
 575   {
 576     EditRegions();
 577   }
 578   else
 579   {
 580     wxRectangleShape::OnRightClick(x, y, keys, attachment);
 581   }
 582 }
 583
 584 wxDividedShapeControlPoint::wxDividedShapeControlPoint(wxShapeCanvas *the_canvas, wxShape *object,
 585   int region, double size, double the_m_xoffset, double the_m_yoffset, int the_type):
 586     wxControlPoint(the_canvas, object, size, the_m_xoffset, the_m_yoffset, the_type)
 587 {
 588   regionId = region;
 589 }
 590
 591 wxDividedShapeControlPoint::~wxDividedShapeControlPoint()
 592 {
 593 }
 594
 595 // Implement resizing of divided object division
 596 void wxDividedShapeControlPoint::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
 597 {
 598     wxClientDC dc(GetCanvas());
 599     GetCanvas()->PrepareDC(dc);
 600
 601     dc.SetLogicalFunction(wxXOR);
 602     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 603     dc.SetPen(dottedPen);
 604     dc.SetBrush((* wxTRANSPARENT_BRUSH));
 605
 606     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 607     double x1 = (double)(dividedObject->GetX() - (dividedObject->GetWidth()/2.0));
 608     double y1 = y;
 609     double x2 = (double)(dividedObject->GetX() + (dividedObject->GetWidth()/2.0));
 610     double y2 = y;
 611     dc.DrawLine(WXROUND(x1), WXROUND(y1), WXROUND(x2), WXROUND(y2));
 612 }
 613
 614 void wxDividedShapeControlPoint::OnBeginDragLeft(double x, double y, int keys, int attachment)
 615 {
 616     wxClientDC dc(GetCanvas());
 617     GetCanvas()->PrepareDC(dc);
 618
 619     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 620     dc.SetLogicalFunction(wxXOR);
 621     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 622     dc.SetPen(dottedPen);
 623     dc.SetBrush((* wxTRANSPARENT_BRUSH));
 624
 625     double x1 = (double)(dividedObject->GetX() - (dividedObject->GetWidth()/2.0));
 626     double y1 = y;
 627     double x2 = (double)(dividedObject->GetX() + (dividedObject->GetWidth()/2.0));
 628     double y2 = y;
 629     dc.DrawLine(WXROUND(x1), WXROUND(y1), WXROUND(x2), WXROUND(y2));
 630     m_canvas->CaptureMouse();
 631 }
 632
 633 void wxDividedShapeControlPoint::OnEndDragLeft(double x, double y, int keys, int attachment)
 634 {
 635     wxClientDC dc(GetCanvas());
 636     GetCanvas()->PrepareDC(dc);
 637
 638     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 639     wxNode *node = dividedObject->GetRegions().Nth(regionId);
 640     if (!node)
 641     return;
 642
 643     wxShapeRegion *thisRegion = (wxShapeRegion *)node->Data();
 644     wxShapeRegion *nextRegion = NULL; // Region below this one
 645
 646     dc.SetLogicalFunction(wxCOPY);
 647
 648     m_canvas->ReleaseMouse();
 649
 650     // Find the old top and bottom of this region,
 651     // and calculate the new proportion for this region
 652     // if legal.
 653
 654     double currentY = (double)(dividedObject->GetY() - (dividedObject->GetHeight() / 2.0));
 655     double maxY = (double)(dividedObject->GetY() + (dividedObject->GetHeight() / 2.0));
 656
 657     // Save values
 658     double thisRegionTop = 0.0;
 659     double thisRegionBottom = 0.0;
 660     double nextRegionBottom = 0.0;
 661
 662     node = dividedObject->GetRegions().First();
 663     while (node)
 664     {
 665       wxShapeRegion *region = (wxShapeRegion *)node->Data();
 666
 667       double proportion = region->m_regionProportionY;
 668       double yy = currentY + (dividedObject->GetHeight()*proportion);
 669       double actualY = (double)(maxY < yy ? maxY : yy);
 670
 671       if (region == thisRegion)
 672       {
 673         thisRegionTop = currentY;
 674         thisRegionBottom = actualY;
 675         if (node->Next())
 676           nextRegion = (wxShapeRegion *)node->Next()->Data();
 677       }
 678       if (region == nextRegion)
 679       {
 680         nextRegionBottom = actualY;
 681       }
 682
 683       currentY = actualY;
 684       node = node->Next();
 685     }
 686     if (!nextRegion)
 687       return;
 688
 689     // Check that we haven't gone above this region or below
 690     // next region.
 691     if ((y <= thisRegionTop) || (y >= nextRegionBottom))
 692     return;
 693
 694     dividedObject->EraseLinks(dc);
 695
 696     // Now calculate the new proportions of this region and the next region.
 697     double thisProportion = (double)((y - thisRegionTop)/dividedObject->GetHeight());
 698     double nextProportion = (double)((nextRegionBottom - y)/dividedObject->GetHeight());
 699     thisRegion->SetProportions(0.0, thisProportion);
 700     nextRegion->SetProportions(0.0, nextProportion);
 701     m_yoffset = (double)(y - dividedObject->GetY());
 702
 703     // Now reformat text
 704     int i = 0;
 705     node = dividedObject->GetRegions().First();
 706     while (node)
 707     {
 708         wxShapeRegion *region = (wxShapeRegion *)node->Data();
 709         if (region->GetText())
 710         {
 711         char *s = copystring(region->GetText());
 712         dividedObject->FormatText(dc, s, i);
 713         delete[] s;
 714         }
 715         node = node->Next();
 716         i++;
 717     }
 718     dividedObject->SetRegionSizes();
 719     dividedObject->Draw(dc);
 720     dividedObject->GetEventHandler()->OnMoveLinks(dc);
 721 }
 722