contrib/src/ogl/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 #if wxUSE_PROLOGIO
  28 #include <wx/deprecated/wxexpr.h>
  29 #endif
  30
  31 #include "wx/ogl/ogl.h"
  32
  33
  34 class wxDividedShapeControlPoint: public wxControlPoint
  35 {
  36  DECLARE_DYNAMIC_CLASS(wxDividedShapeControlPoint)
  37  private:
  38   int regionId;
  39  public:
  40   wxDividedShapeControlPoint() { regionId = 0; }
  41   wxDividedShapeControlPoint(wxShapeCanvas *the_canvas, wxShape *object, int region,
  42                             double size, double the_xoffset, double the_yoffset, int the_type);
  43   ~wxDividedShapeControlPoint();
  44
  45   void OnDragLeft(bool draw, double x, double y, int keys=0, int attachment = 0);
  46   void OnBeginDragLeft(double x, double y, int keys=0, int attachment = 0);
  47   void OnEndDragLeft(double x, double y, int keys=0, int attachment = 0);
  48 };
  49
  50 IMPLEMENT_DYNAMIC_CLASS(wxDividedShapeControlPoint, wxControlPoint)
  51
  52 /*
  53  * Divided object
  54  *
  55  */
  56
  57 IMPLEMENT_DYNAMIC_CLASS(wxDividedShape, wxRectangleShape)
  58
  59 wxDividedShape::wxDividedShape(double w, double h): wxRectangleShape(w, h)
  60 {
  61   ClearRegions();
  62 }
  63
  64 wxDividedShape::~wxDividedShape()
  65 {
  66 }
  67
  68 void wxDividedShape::OnDraw(wxDC& dc)
  69 {
  70   wxRectangleShape::OnDraw(dc);
  71 }
  72
  73 void wxDividedShape::OnDrawContents(wxDC& dc)
  74 {
  75   double defaultProportion = (double)(GetRegions().GetCount() > 0 ? (1.0/((double)(GetRegions().GetCount()))) : 0.0);
  76   double currentY = (double)(m_ypos - (m_height / 2.0));
  77   double maxY = (double)(m_ypos + (m_height / 2.0));
  78
  79   double leftX = (double)(m_xpos - (m_width / 2.0));
  80   double rightX = (double)(m_xpos + (m_width / 2.0));
  81
  82   if (m_pen) dc.SetPen(* m_pen);
  83
  84   if (m_textColour) dc.SetTextForeground(* m_textColour);
  85
  86 #ifdef __WXMSW__
  87   // For efficiency, don't do this under X - doesn't make
  88   // any visible difference for our purposes.
  89   if (m_brush)
  90     dc.SetTextBackground(m_brush->GetColour());
  91 #endif
  92 /*
  93   if (!formatted)
  94   {
  95     FormatRegionText();
  96     formatted = TRUE;
  97   }
  98 */
  99   if (GetDisableLabel()) return;
 100
 101   double xMargin = 2;
 102   double yMargin = 2;
 103   dc.SetBackgroundMode(wxTRANSPARENT);
 104
 105   wxNode *node = GetRegions().GetFirst();
 106   while (node)
 107   {
 108     wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 109     dc.SetFont(* region->GetFont());
 110     dc.SetTextForeground(* region->GetActualColourObject());
 111
 112     double proportion =
 113       region->m_regionProportionY < 0.0 ? defaultProportion : region->m_regionProportionY;
 114
 115     double y = currentY + m_height*proportion;
 116     double actualY = maxY < y ? maxY : y;
 117
 118     double centreX = m_xpos;
 119     double centreY = (double)(currentY + (actualY - currentY)/2.0);
 120
 121     oglDrawFormattedText(dc, &region->m_formattedText,
 122              (double)(centreX), (double)(centreY), (double)(m_width-2*xMargin), (double)(actualY - currentY - 2*yMargin),
 123              region->m_formatMode);
 124     if ((y <= maxY) && (node->GetNext()))
 125     {
 126       wxPen *regionPen = region->GetActualPen();
 127       if (regionPen)
 128       {
 129         dc.SetPen(* regionPen);
 130         dc.DrawLine(WXROUND(leftX), WXROUND(y), WXROUND(rightX), WXROUND(y));
 131       }
 132     }
 133
 134     currentY = actualY;
 135
 136     node = node->GetNext();
 137   }
 138 }
 139
 140 void wxDividedShape::SetSize(double w, double h, bool WXUNUSED(recursive))
 141 {
 142   SetAttachmentSize(w, h);
 143   m_width = w;
 144   m_height = h;
 145   SetRegionSizes();
 146 }
 147
 148 void wxDividedShape::SetRegionSizes()
 149 {
 150   if (GetRegions().GetCount() == 0)
 151     return;
 152
 153   double defaultProportion = (double)(GetRegions().GetCount() > 0 ? (1.0/((double)(GetRegions().GetCount()))) : 0.0);
 154   double currentY = (double)(m_ypos - (m_height / 2.0));
 155   double maxY = (double)(m_ypos + (m_height / 2.0));
 156
 157 //  double leftX = (double)(m_xpos - (m_width / 2.0));
 158 //  double rightX = (double)(m_xpos + (m_width / 2.0));
 159
 160   wxNode *node = GetRegions().GetFirst();
 161   while (node)
 162   {
 163     wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 164     double proportion =
 165       region->m_regionProportionY <= 0.0 ? defaultProportion : region->m_regionProportionY;
 166
 167     double sizeY = (double)proportion*m_height;
 168     double y = currentY + sizeY;
 169     double actualY = maxY < y ? maxY : y;
 170
 171     double centreY = (double)(currentY + (actualY - currentY)/2.0);
 172
 173     region->SetSize(m_width, sizeY);
 174     region->SetPosition(0.0, (double)(centreY - m_ypos));
 175     currentY = actualY;
 176     node = node->GetNext();
 177   }
 178 }
 179
 180 // Attachment points correspond to regions in the divided box
 181 bool wxDividedShape::GetAttachmentPosition(int attachment, double *x, double *y, int nth, int no_arcs,
 182   wxLineShape *line)
 183 {
 184   int totalNumberAttachments = (GetRegions().GetCount() * 2) + 2;
 185   if ((GetAttachmentMode() == ATTACHMENT_MODE_NONE) || (attachment >= totalNumberAttachments))
 186   {
 187     return wxShape::GetAttachmentPosition(attachment, x, y, nth, no_arcs);
 188   }
 189
 190   int n = GetRegions().GetCount();
 191   bool isEnd = (line && line->IsEnd(this));
 192
 193   double left = (double)(m_xpos - m_width/2.0);
 194   double right = (double)(m_xpos + m_width/2.0);
 195   double top = (double)(m_ypos - m_height/2.0);
 196   double bottom = (double)(m_ypos + m_height/2.0);
 197
 198   // Zero is top, n+1 is bottom.
 199   if (attachment == 0)
 200   {
 201     *y = top;
 202     if (m_spaceAttachments)
 203     {
 204       if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 205       {
 206         // Align line according to the next handle along
 207         wxRealPoint *point = line->GetNextControlPoint(this);
 208         if (point->x < left)
 209           *x = left;
 210         else if (point->x > right)
 211           *x = right;
 212         else
 213           *x = point->x;
 214       }
 215       else
 216         *x = left + (nth + 1)*m_width/(no_arcs + 1);
 217     }
 218     else
 219       *x = m_xpos;
 220   }
 221   else if (attachment == (n+1))
 222   {
 223     *y = bottom;
 224     if (m_spaceAttachments)
 225     {
 226       if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 227       {
 228         // Align line according to the next handle along
 229         wxRealPoint *point = line->GetNextControlPoint(this);
 230         if (point->x < left)
 231           *x = left;
 232         else if (point->x > right)
 233           *x = right;
 234         else
 235           *x = point->x;
 236       }
 237       else
 238         *x = left + (nth + 1)*m_width/(no_arcs + 1);
 239     }
 240     else
 241       *x = m_xpos;
 242   }
 243   // Left or right.
 244   else
 245   {
 246     int i = 0;
 247     bool isLeft = FALSE;
 248     if (attachment < (n+1))
 249     {
 250       i = attachment-1;
 251       isLeft = FALSE;
 252     }
 253     else
 254     {
 255       i = (totalNumberAttachments - attachment - 1);
 256       isLeft = TRUE;
 257     }
 258     wxNode *node = GetRegions().Item(i);
 259     if (node)
 260     {
 261       wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 262
 263       if (isLeft)
 264         *x = left;
 265       else
 266         *x = right;
 267
 268       // Calculate top and bottom of region
 269       top = (double)((m_ypos + region->m_y) - (region->m_height/2.0));
 270       bottom = (double)((m_ypos + region->m_y) + (region->m_height/2.0));
 271
 272       // Assuming we can trust the absolute size and
 273       // position of these regions...
 274       if (m_spaceAttachments)
 275       {
 276         if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
 277         {
 278           // Align line according to the next handle along
 279           wxRealPoint *point = line->GetNextControlPoint(this);
 280           if (point->y < bottom)
 281             *y = bottom;
 282           else if (point->y > top)
 283             *y = top;
 284           else
 285             *y = point->y;
 286         }
 287         else
 288 //          *y = (double)(((m_ypos + region->m_y) - (region->m_height/2.0)) + (nth + 1)*region->m_height/(no_arcs+1));
 289           *y = (double)(top + (nth + 1)*region->m_height/(no_arcs+1));
 290       }
 291       else
 292         *y = (double)(m_ypos + region->m_y);
 293     }
 294     else
 295     {
 296       *x = m_xpos;
 297       *y = m_ypos;
 298       return FALSE;
 299     }
 300   }
 301   return TRUE;
 302 }
 303
 304 int wxDividedShape::GetNumberOfAttachments() const
 305 {
 306   // There are two attachments for each region (left and right),
 307   // plus one on the top and one on the bottom.
 308   int n = (GetRegions().GetCount() * 2) + 2;
 309
 310   int maxN = n - 1;
 311   wxNode *node = m_attachmentPoints.GetFirst();
 312   while (node)
 313   {
 314     wxAttachmentPoint *point = (wxAttachmentPoint *)node->GetData();
 315     if (point->m_id > maxN)
 316       maxN = point->m_id;
 317     node = node->GetNext();
 318   }
 319   return maxN + 1;
 320 }
 321
 322 bool wxDividedShape::AttachmentIsValid(int attachment) const
 323 {
 324   int totalNumberAttachments = (GetRegions().GetCount() * 2) + 2;
 325   if (attachment >= totalNumberAttachments)
 326   {
 327     return wxShape::AttachmentIsValid(attachment);
 328   }
 329   else if (attachment >= 0)
 330     return TRUE;
 331   else
 332     return FALSE;
 333 }
 334
 335 void wxDividedShape::Copy(wxShape& copy)
 336 {
 337   wxRectangleShape::Copy(copy);
 338 }
 339
 340 // Region operations
 341
 342 void wxDividedShape::MakeControlPoints()
 343 {
 344   wxRectangleShape::MakeControlPoints();
 345
 346   MakeMandatoryControlPoints();
 347 }
 348
 349 void wxDividedShape::MakeMandatoryControlPoints()
 350 {
 351   double currentY = (double)(GetY() - (m_height / 2.0));
 352   double maxY = (double)(GetY() + (m_height / 2.0));
 353
 354   wxNode *node = GetRegions().GetFirst();
 355   int i = 0;
 356   while (node)
 357   {
 358     wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 359
 360     double proportion = region->m_regionProportionY;
 361
 362     double y = currentY + m_height*proportion;
 363     double actualY = (double)(maxY < y ? maxY : y);
 364
 365     if (node->GetNext())
 366     {
 367       wxDividedShapeControlPoint *controlPoint =
 368         new wxDividedShapeControlPoint(m_canvas, this, i, CONTROL_POINT_SIZE, 0.0, (double)(actualY - GetY()), 0);
 369       m_canvas->AddShape(controlPoint);
 370       m_controlPoints.Append(controlPoint);
 371     }
 372     currentY = actualY;
 373     i ++;
 374     node = node->GetNext();
 375   }
 376 }
 377
 378 void wxDividedShape::ResetControlPoints()
 379 {
 380   // May only have the region handles, (n - 1) of them.
 381   if (m_controlPoints.GetCount() > (GetRegions().GetCount() - 1))
 382     wxRectangleShape::ResetControlPoints();
 383
 384   ResetMandatoryControlPoints();
 385 }
 386
 387 void wxDividedShape::ResetMandatoryControlPoints()
 388 {
 389   double currentY = (double)(GetY() - (m_height / 2.0));
 390   double maxY = (double)(GetY() + (m_height / 2.0));
 391
 392   wxNode *node = m_controlPoints.GetFirst();
 393   int i = 0;
 394   while (node)
 395   {
 396     wxControlPoint *controlPoint = (wxControlPoint *)node->GetData();
 397     if (controlPoint->IsKindOf(CLASSINFO(wxDividedShapeControlPoint)))
 398     {
 399       wxNode *node1 = GetRegions().Item(i);
 400       wxShapeRegion *region = (wxShapeRegion *)node1->GetData();
 401
 402       double proportion = region->m_regionProportionY;
 403
 404       double y = currentY + m_height*proportion;
 405       double actualY = (double)(maxY < y ? maxY : y);
 406
 407       controlPoint->m_xoffset = 0.0;
 408       controlPoint->m_yoffset = (double)(actualY - GetY());
 409       currentY = actualY;
 410       i ++;
 411     }
 412     node = node->GetNext();
 413   }
 414 }
 415
 416 #if wxUSE_PROLOGIO
 417 void wxDividedShape::WriteAttributes(wxExpr *clause)
 418 {
 419   wxRectangleShape::WriteAttributes(clause);
 420 }
 421
 422 void wxDividedShape::ReadAttributes(wxExpr *clause)
 423 {
 424   wxRectangleShape::ReadAttributes(clause);
 425 }
 426 #endif
 427
 428 /*
 429  * Edit the division colour/style
 430  *
 431  */
 432
 433 void wxDividedShape::EditRegions()
 434 {
 435   wxMessageBox(wxT("EditRegions() is unimplemented."), wxT("OGL"), wxOK);
 436
 437   // TODO
 438 #if 0
 439   if (GetRegions().GetCount() < 2)
 440     return;
 441
 442   wxBeginBusyCursor();
 443
 444   GraphicsForm *form = new GraphicsForm("Divided nodes");
 445   // Need an array to store all the style strings,
 446   // since they need to be converted to integers
 447   char **styleStrings = new char *[GetRegions().GetCount()];
 448   for (int j = 0; j < GetRegions().GetCount(); j++)
 449     styleStrings[j] = NULL;
 450
 451   int i = 0;
 452   wxNode *node = GetRegions().GetFirst();
 453   while (node && node->GetNext())
 454   {
 455     wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 456     char buf[50];
 457     sprintf(buf, "Region %d", (i+1));
 458     form->Add(wxMakeFormMessage(buf));
 459     form->Add(wxMakeFormNewLine());
 460
 461     form->Add(wxMakeFormString("Colour", &region->penColour, wxFORM_CHOICE,
 462               new wxList(wxMakeConstraintStrings(
 463     "Invisible"        ,
 464     "BLACK"            ,
 465     "BLUE"             ,
 466     "BROWN"            ,
 467     "CORAL"            ,
 468     "CYAN"             ,
 469     "DARK GREY"        ,
 470     "DARK GREEN"       ,
 471     "DIM GREY"         ,
 472     "GREY"             ,
 473     "GREEN"            ,
 474     "LIGHT BLUE"       ,
 475     "LIGHT GREY"       ,
 476     "MAGENTA"          ,
 477     "MAROON"           ,
 478     "NAVY"             ,
 479     "ORANGE"           ,
 480     "PURPLE"           ,
 481     "RED"              ,
 482     "TURQUOISE"        ,
 483     "VIOLET"           ,
 484     "WHITE"            ,
 485     "YELLOW"           ,
 486     NULL),
 487     NULL), NULL, wxVERTICAL, 150));
 488
 489     char *styleString = NULL;
 490     switch (region->penStyle)
 491     {
 492       case wxSHORT_DASH:
 493         styleString = "Short Dash";
 494         break;
 495       case wxLONG_DASH:
 496         styleString = "Long Dash";
 497         break;
 498       case wxDOT:
 499         styleString = "Dot";
 500         break;
 501       case wxDOT_DASH:
 502         styleString = "Dot Dash";
 503         break;
 504       case wxSOLID:
 505       default:
 506         styleString = "Solid";
 507         break;
 508     }
 509     styleStrings[i] = copystring(styleString);
 510     form->Add(wxMakeFormString("Style", &(styleStrings[i]), wxFORM_CHOICE,
 511               new wxList(wxMakeConstraintStrings(
 512     "Solid"            ,
 513     "Short Dash"       ,
 514     "Long Dash"        ,
 515     "Dot"              ,
 516     "Dot Dash"         ,
 517     NULL),
 518     NULL), NULL, wxVERTICAL, 100));
 519     node = node->GetNext();
 520     i ++;
 521     if (node && node->GetNext())
 522       form->Add(wxMakeFormNewLine());
 523   }
 524   wxDialogBox *dialog = new wxDialogBox(m_canvas->GetParent(), "Divided object properties", 10, 10, 500, 500);
 525   if (GraphicsLabelFont)
 526     dialog->SetLabelFont(GraphicsLabelFont);
 527   if (GraphicsButtonFont)
 528     dialog->SetButtonFont(GraphicsButtonFont);
 529   form->AssociatePanel(dialog);
 530   form->dialog = dialog;
 531
 532   dialog->Fit();
 533   dialog->Centre(wxBOTH);
 534
 535   wxEndBusyCursor();
 536
 537   dialog->Show(TRUE);
 538
 539   node = GetRegions().GetFirst();
 540   i = 0;
 541   while (node)
 542   {
 543     wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 544
 545     if (styleStrings[i])
 546     {
 547       if (strcmp(styleStrings[i], "Solid") == 0)
 548         region->penStyle = wxSOLID;
 549       else if (strcmp(styleStrings[i], "Dot") == 0)
 550         region->penStyle = wxDOT;
 551       else if (strcmp(styleStrings[i], "Short Dash") == 0)
 552         region->penStyle = wxSHORT_DASH;
 553       else if (strcmp(styleStrings[i], "Long Dash") == 0)
 554         region->penStyle = wxLONG_DASH;
 555       else if (strcmp(styleStrings[i], "Dot Dash") == 0)
 556         region->penStyle = wxDOT_DASH;
 557       delete[] styleStrings[i];
 558     }
 559     region->m_actualPenObject = NULL;
 560     node = node->GetNext();
 561     i ++;
 562   }
 563   delete[] styleStrings;
 564   Draw(dc);
 565 #endif
 566 }
 567
 568 void wxDividedShape::OnRightClick(double x, double y, int keys, int attachment)
 569 {
 570   if (keys & KEY_CTRL)
 571   {
 572     EditRegions();
 573   }
 574   else
 575   {
 576     wxRectangleShape::OnRightClick(x, y, keys, attachment);
 577   }
 578 }
 579
 580 wxDividedShapeControlPoint::wxDividedShapeControlPoint(wxShapeCanvas *the_canvas, wxShape *object,
 581   int region, double size, double the_m_xoffset, double the_m_yoffset, int the_type):
 582     wxControlPoint(the_canvas, object, size, the_m_xoffset, the_m_yoffset, the_type)
 583 {
 584   regionId = region;
 585 }
 586
 587 wxDividedShapeControlPoint::~wxDividedShapeControlPoint()
 588 {
 589 }
 590
 591 // Implement resizing of divided object division
 592 void wxDividedShapeControlPoint::OnDragLeft(bool WXUNUSED(draw), double WXUNUSED(x), double y, int WXUNUSED(keys), int WXUNUSED(attachment))
 593 {
 594     wxClientDC dc(GetCanvas());
 595     GetCanvas()->PrepareDC(dc);
 596
 597     dc.SetLogicalFunction(OGLRBLF);
 598     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 599     dc.SetPen(dottedPen);
 600     dc.SetBrush((* wxTRANSPARENT_BRUSH));
 601
 602     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 603     double x1 = (double)(dividedObject->GetX() - (dividedObject->GetWidth()/2.0));
 604     double y1 = y;
 605     double x2 = (double)(dividedObject->GetX() + (dividedObject->GetWidth()/2.0));
 606     double y2 = y;
 607     dc.DrawLine(WXROUND(x1), WXROUND(y1), WXROUND(x2), WXROUND(y2));
 608 }
 609
 610 void wxDividedShapeControlPoint::OnBeginDragLeft(double WXUNUSED(x), double y, int WXUNUSED(keys), int WXUNUSED(attachment))
 611 {
 612     wxClientDC dc(GetCanvas());
 613     GetCanvas()->PrepareDC(dc);
 614
 615     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 616     dc.SetLogicalFunction(OGLRBLF);
 617     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 618     dc.SetPen(dottedPen);
 619     dc.SetBrush((* wxTRANSPARENT_BRUSH));
 620
 621     double x1 = (double)(dividedObject->GetX() - (dividedObject->GetWidth()/2.0));
 622     double y1 = y;
 623     double x2 = (double)(dividedObject->GetX() + (dividedObject->GetWidth()/2.0));
 624     double y2 = y;
 625     dc.DrawLine(WXROUND(x1), WXROUND(y1), WXROUND(x2), WXROUND(y2));
 626     m_canvas->CaptureMouse();
 627 }
 628
 629 void wxDividedShapeControlPoint::OnEndDragLeft(double WXUNUSED(x), double y, int WXUNUSED(keys), int WXUNUSED(attachment))
 630 {
 631     wxClientDC dc(GetCanvas());
 632     GetCanvas()->PrepareDC(dc);
 633
 634     wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
 635     wxNode *node = dividedObject->GetRegions().Item(regionId);
 636     if (!node)
 637     return;
 638
 639     wxShapeRegion *thisRegion = (wxShapeRegion *)node->GetData();
 640     wxShapeRegion *nextRegion = NULL; // Region below this one
 641
 642     dc.SetLogicalFunction(wxCOPY);
 643
 644     m_canvas->ReleaseMouse();
 645
 646     // Find the old top and bottom of this region,
 647     // and calculate the new proportion for this region
 648     // if legal.
 649
 650     double currentY = (double)(dividedObject->GetY() - (dividedObject->GetHeight() / 2.0));
 651     double maxY = (double)(dividedObject->GetY() + (dividedObject->GetHeight() / 2.0));
 652
 653     // Save values
 654     double thisRegionTop = 0.0;
 655     #if 0
 656     // this variable is not readed later
 657     double thisRegionBottom = 0.0;
 658     #endif
 659     double nextRegionBottom = 0.0;
 660
 661     node = dividedObject->GetRegions().GetFirst();
 662     while (node)
 663     {
 664       wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 665
 666       double proportion = region->m_regionProportionY;
 667       double yy = currentY + (dividedObject->GetHeight()*proportion);
 668       double actualY = (double)(maxY < yy ? maxY : yy);
 669
 670       if (region == thisRegion)
 671       {
 672         thisRegionTop = currentY;
 673         #if 0
 674         // no need for assignment if value is not used later
 675         thisRegionBottom = actualY;
 676         #endif
 677         if (node->GetNext())
 678           nextRegion = (wxShapeRegion *)node->GetNext()->GetData();
 679       }
 680       if (region == nextRegion)
 681       {
 682         nextRegionBottom = actualY;
 683       }
 684
 685       currentY = actualY;
 686       node = node->GetNext();
 687     }
 688     if (!nextRegion)
 689       return;
 690
 691     // Check that we haven't gone above this region or below
 692     // next region.
 693     if ((y <= thisRegionTop) || (y >= nextRegionBottom))
 694     return;
 695
 696     dividedObject->EraseLinks(dc);
 697
 698     // Now calculate the new proportions of this region and the next region.
 699     double thisProportion = (double)((y - thisRegionTop)/dividedObject->GetHeight());
 700     double nextProportion = (double)((nextRegionBottom - y)/dividedObject->GetHeight());
 701     thisRegion->SetProportions(0.0, thisProportion);
 702     nextRegion->SetProportions(0.0, nextProportion);
 703     m_yoffset = (double)(y - dividedObject->GetY());
 704
 705     // Now reformat text
 706     int i = 0;
 707     node = dividedObject->GetRegions().GetFirst();
 708     while (node)
 709     {
 710         wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 711         if (region->GetText())
 712         {
 713         wxChar *s = copystring(region->GetText());
 714         dividedObject->FormatText(dc, s, i);
 715         delete[] s;
 716         }
 717         node = node->GetNext();
 718         i++;
 719     }
 720     dividedObject->SetRegionSizes();
 721     dividedObject->Draw(dc);
 722     dividedObject->GetEventHandler()->OnMoveLinks(dc);
 723 }
 724