contrib/src/ogl/lines.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        lines.cpp
   3 // Purpose:     wxLineShape
   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 "lines.h"
  14 #pragma implementation "linesp.h"
  15 #endif
  16
  17 // For compilers that support precompilation, includes "wx.h".
  18 #include "wx/wxprec.h"
  19
  20 #ifdef __BORLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WX_PRECOMP
  25 #include <wx/wx.h>
  26 #endif
  27
  28 #if wxUSE_PROLOGIO
  29 #include <wx/deprecated/wxexpr.h>
  30 #endif
  31
  32 #ifdef new
  33 #undef new
  34 #endif
  35
  36 #include <ctype.h>
  37 #include <math.h>
  38
  39 #include "wx/ogl/ogl.h"
  40
  41
  42 // Line shape
  43 IMPLEMENT_DYNAMIC_CLASS(wxLineShape, wxShape)
  44
  45 wxLineShape::wxLineShape()
  46 {
  47   m_sensitivity = OP_CLICK_LEFT | OP_CLICK_RIGHT;
  48   m_draggable = FALSE;
  49   m_attachmentTo = 0;
  50   m_attachmentFrom = 0;
  51 /*
  52   m_actualTextWidth = 0.0;
  53   m_actualTextHeight = 0.0;
  54 */
  55   m_from = NULL;
  56   m_to = NULL;
  57   m_erasing = FALSE;
  58   m_arrowSpacing = 5.0; // For the moment, don't bother saving this to file.
  59   m_ignoreArrowOffsets = FALSE;
  60   m_isSpline = FALSE;
  61   m_maintainStraightLines = FALSE;
  62   m_alignmentStart = 0;
  63   m_alignmentEnd = 0;
  64
  65   m_lineControlPoints = NULL;
  66
  67   // Clear any existing regions (created in an earlier constructor)
  68   // and make the three line regions.
  69   ClearRegions();
  70   wxShapeRegion *newRegion = new wxShapeRegion;
  71   newRegion->SetName(wxT("Middle"));
  72   newRegion->SetSize(150, 50);
  73   m_regions.Append((wxObject *)newRegion);
  74
  75   newRegion = new wxShapeRegion;
  76   newRegion->SetName(wxT("Start"));
  77   newRegion->SetSize(150, 50);
  78   m_regions.Append((wxObject *)newRegion);
  79
  80   newRegion = new wxShapeRegion;
  81   newRegion->SetName(wxT("End"));
  82   newRegion->SetSize(150, 50);
  83   m_regions.Append((wxObject *)newRegion);
  84
  85   for (int i = 0; i < 3; i++)
  86     m_labelObjects[i] = NULL;
  87 }
  88
  89 wxLineShape::~wxLineShape()
  90 {
  91   if (m_lineControlPoints)
  92   {
  93     ClearPointList(*m_lineControlPoints);
  94     delete m_lineControlPoints;
  95   }
  96   for (int i = 0; i < 3; i++)
  97   {
  98     if (m_labelObjects[i])
  99     {
 100       m_labelObjects[i]->Select(FALSE);
 101       m_labelObjects[i]->RemoveFromCanvas(m_canvas);
 102       delete m_labelObjects[i];
 103       m_labelObjects[i] = NULL;
 104     }
 105   }
 106   ClearArrowsAtPosition(-1);
 107 }
 108
 109 void wxLineShape::MakeLineControlPoints(int n)
 110 {
 111   if (m_lineControlPoints)
 112   {
 113     ClearPointList(*m_lineControlPoints);
 114     delete m_lineControlPoints;
 115   }
 116   m_lineControlPoints = new wxList;
 117
 118   for (int i = 0; i < n; i++)
 119   {
 120     wxRealPoint *point = new wxRealPoint(-999, -999);
 121     m_lineControlPoints->Append((wxObject*) point);
 122   }
 123 }
 124
 125 wxNode *wxLineShape::InsertLineControlPoint(wxDC* dc)
 126 {
 127     if (dc)
 128         Erase(*dc);
 129
 130   wxNode *last = m_lineControlPoints->GetLast();
 131   wxNode *second_last = last->GetPrevious();
 132   wxRealPoint *last_point = (wxRealPoint *)last->GetData();
 133   wxRealPoint *second_last_point = (wxRealPoint *)second_last->GetData();
 134
 135   // Choose a point half way between the last and penultimate points
 136   double line_x = ((last_point->x + second_last_point->x)/2);
 137   double line_y = ((last_point->y + second_last_point->y)/2);
 138
 139   wxRealPoint *point = new wxRealPoint(line_x, line_y);
 140   wxNode *node = m_lineControlPoints->Insert(last, (wxObject*) point);
 141   return node;
 142 }
 143
 144 bool wxLineShape::DeleteLineControlPoint()
 145 {
 146   if (m_lineControlPoints->GetCount() < 3)
 147     return FALSE;
 148
 149   wxNode *last = m_lineControlPoints->GetLast();
 150   wxNode *second_last = last->GetPrevious();
 151
 152   wxRealPoint *second_last_point = (wxRealPoint *)second_last->GetData();
 153   delete second_last_point;
 154   delete second_last;
 155
 156   return TRUE;
 157 }
 158
 159 void wxLineShape::Initialise()
 160 {
 161   if (m_lineControlPoints)
 162   {
 163     // Just move the first and last control points
 164     wxNode *first = m_lineControlPoints->GetFirst();
 165     wxRealPoint *first_point = (wxRealPoint *)first->GetData();
 166
 167     wxNode *last = m_lineControlPoints->GetLast();
 168     wxRealPoint *last_point = (wxRealPoint *)last->GetData();
 169
 170     // If any of the line points are at -999, we must
 171     // initialize them by placing them half way between the first
 172     // and the last.
 173     wxNode *node = first->GetNext();
 174     while (node)
 175     {
 176       wxRealPoint *point = (wxRealPoint *)node->GetData();
 177       if (point->x == -999)
 178       {
 179         double x1, y1, x2, y2;
 180         if (first_point->x < last_point->x)
 181           { x1 = first_point->x; x2 = last_point->x; }
 182         else
 183           { x2 = first_point->x; x1 = last_point->x; }
 184
 185         if (first_point->y < last_point->y)
 186           { y1 = first_point->y; y2 = last_point->y; }
 187         else
 188           { y2 = first_point->y; y1 = last_point->y; }
 189
 190         point->x = ((x2 - x1)/2 + x1);
 191         point->y = ((y2 - y1)/2 + y1);
 192       }
 193       node = node->GetNext();
 194     }
 195   }
 196 }
 197
 198 // Format a text string according to the region size, adding
 199 // strings with positions to region text list
 200 void wxLineShape::FormatText(wxDC& dc, const wxString& s, int i)
 201 {
 202   double w, h;
 203   ClearText(i);
 204
 205   if (m_regions.GetCount() < 1)
 206     return;
 207   wxNode *node = m_regions.Item(i);
 208   if (!node)
 209     return;
 210
 211   wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 212   region->SetText(s);
 213   dc.SetFont(* region->GetFont());
 214
 215   region->GetSize(&w, &h);
 216   // Initialize the size if zero
 217   if (((w == 0) || (h == 0)) && (s.Length() > 0))
 218   {
 219     w = 100; h = 50;
 220     region->SetSize(w, h);
 221   }
 222
 223   wxStringList *string_list = oglFormatText(dc, s, (w-5), (h-5), region->GetFormatMode());
 224   node = (wxNode*)string_list->GetFirst();
 225   while (node)
 226   {
 227     wxChar *s = (wxChar *)node->GetData();
 228     wxShapeTextLine *line = new wxShapeTextLine(0.0, 0.0, s);
 229     region->GetFormattedText().Append((wxObject *)line);
 230     node = node->GetNext();
 231   }
 232   delete string_list;
 233   double actualW = w;
 234   double actualH = h;
 235   if (region->GetFormatMode() & FORMAT_SIZE_TO_CONTENTS)
 236   {
 237     oglGetCentredTextExtent(dc, &(region->GetFormattedText()), m_xpos, m_ypos, w, h, &actualW, &actualH);
 238     if ((actualW != w ) || (actualH != h))
 239     {
 240       double xx, yy;
 241       GetLabelPosition(i, &xx, &yy);
 242       EraseRegion(dc, region, xx, yy);
 243       if (m_labelObjects[i])
 244       {
 245         m_labelObjects[i]->Select(FALSE, &dc);
 246         m_labelObjects[i]->Erase(dc);
 247         m_labelObjects[i]->SetSize(actualW, actualH);
 248       }
 249
 250       region->SetSize(actualW, actualH);
 251
 252       if (m_labelObjects[i])
 253       {
 254         m_labelObjects[i]->Select(TRUE, & dc);
 255         m_labelObjects[i]->Draw(dc);
 256       }
 257     }
 258   }
 259   oglCentreText(dc, &(region->GetFormattedText()), m_xpos, m_ypos, actualW, actualH, region->GetFormatMode());
 260   m_formatted = TRUE;
 261 }
 262
 263 void wxLineShape::DrawRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
 264 {
 265   if (GetDisableLabel())
 266     return;
 267
 268   double w, h;
 269   double xx, yy;
 270   region->GetSize(&w, &h);
 271
 272   // Get offset from x, y
 273   region->GetPosition(&xx, &yy);
 274
 275   double xp = xx + x;
 276   double yp = yy + y;
 277
 278   // First, clear a rectangle for the text IF there is any
 279   if (region->GetFormattedText().GetCount() > 0)
 280   {
 281       dc.SetPen(GetBackgroundPen());
 282       dc.SetBrush(GetBackgroundBrush());
 283
 284       // Now draw the text
 285       if (region->GetFont()) dc.SetFont(* region->GetFont());
 286
 287       dc.DrawRectangle((long)(xp - w/2.0), (long)(yp - h/2.0), (long)w, (long)h);
 288
 289       if (m_pen) dc.SetPen(* m_pen);
 290       dc.SetTextForeground(region->GetActualColourObject());
 291
 292 #ifdef __WXMSW__
 293       dc.SetTextBackground(GetBackgroundBrush().GetColour());
 294 #endif
 295
 296       oglDrawFormattedText(dc, &(region->GetFormattedText()), xp, yp, w, h, region->GetFormatMode());
 297   }
 298 }
 299
 300 void wxLineShape::EraseRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
 301 {
 302   if (GetDisableLabel())
 303     return;
 304
 305   double w, h;
 306   double xx, yy;
 307   region->GetSize(&w, &h);
 308
 309   // Get offset from x, y
 310   region->GetPosition(&xx, &yy);
 311
 312   double xp = xx + x;
 313   double yp = yy + y;
 314
 315   if (region->GetFormattedText().GetCount() > 0)
 316   {
 317       dc.SetPen(GetBackgroundPen());
 318       dc.SetBrush(GetBackgroundBrush());
 319
 320       dc.DrawRectangle((long)(xp - w/2.0), (long)(yp - h/2.0), (long)w, (long)h);
 321   }
 322 }
 323
 324 // Get the reference point for a label. Region x and y
 325 // are offsets from this.
 326 // position is 0, 1, 2
 327 void wxLineShape::GetLabelPosition(int position, double *x, double *y)
 328 {
 329   switch (position)
 330   {
 331     case 0:
 332     {
 333       // Want to take the middle section for the label
 334       int n = m_lineControlPoints->GetCount();
 335       int half_way = (int)(n/2);
 336
 337       // Find middle of this line
 338       wxNode *node = m_lineControlPoints->Item(half_way - 1);
 339       wxRealPoint *point = (wxRealPoint *)node->GetData();
 340       wxNode *next_node = node->GetNext();
 341       wxRealPoint *next_point = (wxRealPoint *)next_node->GetData();
 342
 343       double dx = (next_point->x - point->x);
 344       double dy = (next_point->y - point->y);
 345       *x = (double)(point->x + dx/2.0);
 346       *y = (double)(point->y + dy/2.0);
 347       break;
 348     }
 349     case 1:
 350     {
 351       wxNode *node = m_lineControlPoints->GetFirst();
 352       *x = ((wxRealPoint *)node->GetData())->x;
 353       *y = ((wxRealPoint *)node->GetData())->y;
 354       break;
 355     }
 356     case 2:
 357     {
 358       wxNode *node = m_lineControlPoints->GetLast();
 359       *x = ((wxRealPoint *)node->GetData())->x;
 360       *y = ((wxRealPoint *)node->GetData())->y;
 361       break;
 362     }
 363     default:
 364       break;
 365   }
 366 }
 367
 368 /*
 369  * Find whether line is supposed to be vertical or horizontal and
 370  * make it so.
 371  *
 372  */
 373 void GraphicsStraightenLine(wxRealPoint *point1, wxRealPoint *point2)
 374 {
 375   double dx = point2->x - point1->x;
 376   double dy = point2->y - point1->y;
 377
 378   if (dx == 0.0)
 379     return;
 380   else if (fabs(dy/dx) > 1.0)
 381   {
 382     point2->x = point1->x;
 383   }
 384   else point2->y = point1->y;
 385 }
 386
 387 void wxLineShape::Straighten(wxDC *dc)
 388 {
 389   if (!m_lineControlPoints || m_lineControlPoints->GetCount() < 3)
 390     return;
 391
 392   if (dc)
 393     Erase(* dc);
 394
 395   wxNode *first_point_node = m_lineControlPoints->GetFirst();
 396   wxNode *last_point_node = m_lineControlPoints->GetLast();
 397   wxNode *second_last_point_node = last_point_node->GetPrevious();
 398
 399   wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
 400   wxRealPoint *second_last_point = (wxRealPoint *)second_last_point_node->GetData();
 401
 402   GraphicsStraightenLine(last_point, second_last_point);
 403
 404   wxNode *node = first_point_node;
 405   while (node && (node != second_last_point_node))
 406   {
 407     wxRealPoint *point = (wxRealPoint *)node->GetData();
 408     wxRealPoint *next_point = (wxRealPoint *)(node->GetNext()->GetData());
 409
 410     GraphicsStraightenLine(point, next_point);
 411     node = node->GetNext();
 412   }
 413
 414   if (dc)
 415     Draw(* dc);
 416 }
 417
 418
 419 void wxLineShape::Unlink()
 420 {
 421   if (m_to)
 422     m_to->GetLines().DeleteObject(this);
 423   if (m_from)
 424     m_from->GetLines().DeleteObject(this);
 425   m_to = NULL;
 426   m_from = NULL;
 427 }
 428
 429 void wxLineShape::SetEnds(double x1, double y1, double x2, double y2)
 430 {
 431   // Find centre point
 432   wxNode *first_point_node = m_lineControlPoints->GetFirst();
 433   wxNode *last_point_node = m_lineControlPoints->GetLast();
 434   wxRealPoint *first_point = (wxRealPoint *)first_point_node->GetData();
 435   wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
 436
 437   first_point->x = x1;
 438   first_point->y = y1;
 439   last_point->x = x2;
 440   last_point->y = y2;
 441
 442   m_xpos = (double)((x1 + x2)/2.0);
 443   m_ypos = (double)((y1 + y2)/2.0);
 444 }
 445
 446 // Get absolute positions of ends
 447 void wxLineShape::GetEnds(double *x1, double *y1, double *x2, double *y2)
 448 {
 449   wxNode *first_point_node = m_lineControlPoints->GetFirst();
 450   wxNode *last_point_node = m_lineControlPoints->GetLast();
 451   wxRealPoint *first_point = (wxRealPoint *)first_point_node->GetData();
 452   wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
 453
 454   *x1 = first_point->x; *y1 = first_point->y;
 455   *x2 = last_point->x; *y2 = last_point->y;
 456 }
 457
 458 void wxLineShape::SetAttachments(int from_attach, int to_attach)
 459 {
 460   m_attachmentFrom = from_attach;
 461   m_attachmentTo = to_attach;
 462 }
 463
 464 bool wxLineShape::HitTest(double x, double y, int *attachment, double *distance)
 465 {
 466   if (!m_lineControlPoints)
 467     return FALSE;
 468
 469   // Look at label regions in case mouse is over a label
 470   bool inLabelRegion = FALSE;
 471   for (int i = 0; i < 3; i ++)
 472   {
 473     wxNode *regionNode = m_regions.Item(i);
 474     if (regionNode)
 475     {
 476       wxShapeRegion *region = (wxShapeRegion *)regionNode->GetData();
 477       if (region->m_formattedText.GetCount() > 0)
 478       {
 479         double xp, yp, cx, cy, cw, ch;
 480         GetLabelPosition(i, &xp, &yp);
 481         // Offset region from default label position
 482         region->GetPosition(&cx, &cy);
 483         region->GetSize(&cw, &ch);
 484         cx += xp;
 485         cy += yp;
 486         double rLeft = (double)(cx - (cw/2.0));
 487         double rTop = (double)(cy - (ch/2.0));
 488         double rRight = (double)(cx + (cw/2.0));
 489         double rBottom = (double)(cy + (ch/2.0));
 490         if (x > rLeft && x < rRight && y > rTop && y < rBottom)
 491         {
 492           inLabelRegion = TRUE;
 493           i = 3;
 494         }
 495       }
 496     }
 497   }
 498
 499   wxNode *node = m_lineControlPoints->GetFirst();
 500
 501   while (node && node->GetNext())
 502   {
 503     wxRealPoint *point1 = (wxRealPoint *)node->GetData();
 504     wxRealPoint *point2 = (wxRealPoint *)node->GetNext()->GetData();
 505
 506     // For inaccurate mousing allow 8 pixel corridor
 507     int extra = 4;
 508
 509     double dx = point2->x - point1->x;
 510     double dy = point2->y - point1->y;
 511     double seg_len = sqrt(dx*dx+dy*dy);
 512     double distance_from_seg =
 513       seg_len*((x-point1->x)*dy-(y-point1->y)*dx)/(dy*dy+dx*dx);
 514     double distance_from_prev =
 515       seg_len*((y-point1->y)*dy+(x-point1->x)*dx)/(dy*dy+dx*dx);
 516
 517     if ((fabs(distance_from_seg) < extra &&
 518          distance_from_prev >= 0 && distance_from_prev <= seg_len)
 519         || inLabelRegion)
 520     {
 521       *attachment = 0;
 522       *distance = distance_from_seg;
 523       return TRUE;
 524     }
 525
 526     node = node->GetNext();
 527   }
 528   return FALSE;
 529 }
 530
 531 void wxLineShape::DrawArrows(wxDC& dc)
 532 {
 533   // Distance along line of each arrow: space them out evenly.
 534   double startArrowPos = 0.0;
 535   double endArrowPos = 0.0;
 536   double middleArrowPos = 0.0;
 537
 538   wxNode *node = m_arcArrows.GetFirst();
 539   while (node)
 540   {
 541     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
 542     switch (arrow->GetArrowEnd())
 543     {
 544       case ARROW_POSITION_START:
 545       {
 546         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 547           // If specified, x offset is proportional to line length
 548           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 549         else
 550         {
 551           DrawArrow(dc, arrow, startArrowPos, FALSE);      // Absolute distance
 552           startArrowPos += arrow->GetSize() + arrow->GetSpacing();
 553         }
 554         break;
 555       }
 556       case ARROW_POSITION_END:
 557       {
 558         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 559           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 560         else
 561         {
 562           DrawArrow(dc, arrow, endArrowPos, FALSE);
 563           endArrowPos += arrow->GetSize() + arrow->GetSpacing();
 564         }
 565         break;
 566       }
 567       case ARROW_POSITION_MIDDLE:
 568       {
 569         arrow->SetXOffset(middleArrowPos);
 570         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 571           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 572         else
 573         {
 574           DrawArrow(dc, arrow, middleArrowPos, FALSE);
 575           middleArrowPos += arrow->GetSize() + arrow->GetSpacing();
 576         }
 577         break;
 578       }
 579     }
 580     node = node->GetNext();
 581   }
 582 }
 583
 584 void wxLineShape::DrawArrow(wxDC& dc, wxArrowHead *arrow, double xOffset, bool proportionalOffset)
 585 {
 586   wxNode *first_line_node = m_lineControlPoints->GetFirst();
 587   wxRealPoint *first_line_point = (wxRealPoint *)first_line_node->GetData();
 588   wxNode *second_line_node = first_line_node->GetNext();
 589   wxRealPoint *second_line_point = (wxRealPoint *)second_line_node->GetData();
 590
 591   wxNode *last_line_node = m_lineControlPoints->GetLast();
 592   wxRealPoint *last_line_point = (wxRealPoint *)last_line_node->GetData();
 593   wxNode *second_last_line_node = last_line_node->GetPrevious();
 594   wxRealPoint *second_last_line_point = (wxRealPoint *)second_last_line_node->GetData();
 595
 596   // Position where we want to start drawing
 597   double positionOnLineX, positionOnLineY;
 598
 599   // Position of start point of line, at the end of which we draw the arrow.
 600   double startPositionX = 0.0 , startPositionY = 0.0;
 601
 602   switch (arrow->GetPosition())
 603   {
 604     case ARROW_POSITION_START:
 605     {
 606       // If we're using a proportional offset, calculate just where this will
 607       // be on the line.
 608       double realOffset = xOffset;
 609       if (proportionalOffset)
 610       {
 611         double totalLength =
 612           (double)sqrt((second_line_point->x - first_line_point->x)*(second_line_point->x - first_line_point->x) +
 613                       (second_line_point->y - first_line_point->y)*(second_line_point->y - first_line_point->y));
 614         realOffset = (double)(xOffset * totalLength);
 615       }
 616       GetPointOnLine(second_line_point->x, second_line_point->y,
 617                      first_line_point->x, first_line_point->y,
 618                      realOffset, &positionOnLineX, &positionOnLineY);
 619       startPositionX = second_line_point->x;
 620       startPositionY = second_line_point->y;
 621       break;
 622     }
 623     case ARROW_POSITION_END:
 624     {
 625       // If we're using a proportional offset, calculate just where this will
 626       // be on the line.
 627       double realOffset = xOffset;
 628       if (proportionalOffset)
 629       {
 630         double totalLength =
 631           (double)sqrt((second_last_line_point->x - last_line_point->x)*(second_last_line_point->x - last_line_point->x) +
 632                       (second_last_line_point->y - last_line_point->y)*(second_last_line_point->y - last_line_point->y));
 633         realOffset = (double)(xOffset * totalLength);
 634       }
 635       GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
 636                      last_line_point->x, last_line_point->y,
 637                      realOffset, &positionOnLineX, &positionOnLineY);
 638       startPositionX = second_last_line_point->x;
 639       startPositionY = second_last_line_point->y;
 640       break;
 641     }
 642     case ARROW_POSITION_MIDDLE:
 643     {
 644       // Choose a point half way between the last and penultimate points
 645       double x = ((last_line_point->x + second_last_line_point->x)/2);
 646       double y = ((last_line_point->y + second_last_line_point->y)/2);
 647
 648       // If we're using a proportional offset, calculate just where this will
 649       // be on the line.
 650       double realOffset = xOffset;
 651       if (proportionalOffset)
 652       {
 653         double totalLength =
 654           (double)sqrt((second_last_line_point->x - x)*(second_last_line_point->x - x) +
 655                       (second_last_line_point->y - y)*(second_last_line_point->y - y));
 656         realOffset = (double)(xOffset * totalLength);
 657       }
 658
 659       GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
 660                      x, y, realOffset, &positionOnLineX, &positionOnLineY);
 661       startPositionX = second_last_line_point->x;
 662       startPositionY = second_last_line_point->y;
 663       break;
 664     }
 665   }
 666
 667   /*
 668    * Add yOffset to arrow, if any
 669    */
 670
 671   const double myPi = (double) 3.14159265;
 672   // The translation that the y offset may give
 673   double deltaX = 0.0;
 674   double deltaY = 0.0;
 675   if ((arrow->GetYOffset() != 0.0) && !m_ignoreArrowOffsets)
 676   {
 677     /*
 678                                  |(x4, y4)
 679                                  |d
 680                                  |
 681        (x1, y1)--------------(x3, y3)------------------(x2, y2)
 682        x4 = x3 - d * sin(theta)
 683        y4 = y3 + d * cos(theta)
 684
 685        Where theta = tan(-1) of (y3-y1)/(x3-x1)
 686      */
 687      double x1 = startPositionX;
 688      double y1 = startPositionY;
 689      double x3 = positionOnLineX;
 690      double y3 = positionOnLineY;
 691      double d = -arrow->GetYOffset(); // Negate so +offset is above line
 692
 693      double theta;
 694      if (x3 == x1)
 695        theta = (double)(myPi/2.0);
 696      else
 697        theta = (double)atan((y3-y1)/(x3-x1));
 698
 699      double x4 = (double)(x3 - (d*sin(theta)));
 700      double y4 = (double)(y3 + (d*cos(theta)));
 701
 702      deltaX = x4 - positionOnLineX;
 703      deltaY = y4 - positionOnLineY;
 704   }
 705
 706   switch (arrow->_GetType())
 707   {
 708     case ARROW_ARROW:
 709     {
 710       double arrowLength = arrow->GetSize();
 711       double arrowWidth = (double)(arrowLength/3.0);
 712
 713       double tip_x, tip_y, side1_x, side1_y, side2_x, side2_y;
 714       oglGetArrowPoints(startPositionX+deltaX, startPositionY+deltaY,
 715                        positionOnLineX+deltaX, positionOnLineY+deltaY,
 716                        arrowLength, arrowWidth, &tip_x, &tip_y,
 717                        &side1_x, &side1_y, &side2_x, &side2_y);
 718
 719       wxPoint points[4];
 720       points[0].x = (int) tip_x; points[0].y = (int) tip_y;
 721       points[1].x = (int) side1_x; points[1].y = (int) side1_y;
 722       points[2].x = (int) side2_x; points[2].y = (int) side2_y;
 723       points[3].x = (int) tip_x; points[3].y = (int) tip_y;
 724
 725       dc.SetPen(* m_pen);
 726       dc.SetBrush(* m_brush);
 727       dc.DrawPolygon(4, points);
 728       break;
 729     }
 730     case ARROW_HOLLOW_CIRCLE:
 731     case ARROW_FILLED_CIRCLE:
 732     {
 733       // Find point on line of centre of circle, which is a radius away
 734       // from the end position
 735       double diameter = (double)(arrow->GetSize());
 736       double x, y;
 737       GetPointOnLine(startPositionX+deltaX, startPositionY+deltaY,
 738                    positionOnLineX+deltaX, positionOnLineY+deltaY,
 739                    (double)(diameter/2.0),
 740                    &x, &y);
 741
 742       // Convert ellipse centre to top-left coordinates
 743       double x1 = (double)(x - (diameter/2.0));
 744       double y1 = (double)(y - (diameter/2.0));
 745
 746       dc.SetPen(* m_pen);
 747       if (arrow->_GetType() == ARROW_HOLLOW_CIRCLE)
 748         dc.SetBrush(GetBackgroundBrush());
 749       else
 750         dc.SetBrush(* m_brush);
 751
 752       dc.DrawEllipse((long) x1, (long) y1, (long) diameter, (long) diameter);
 753       break;
 754     }
 755     case ARROW_SINGLE_OBLIQUE:
 756     {
 757       break;
 758     }
 759     case ARROW_METAFILE:
 760     {
 761       if (arrow->GetMetaFile())
 762       {
 763         // Find point on line of centre of object, which is a half-width away
 764         // from the end position
 765         /*
 766          *                width
 767          * <-- start pos  <-----><-- positionOnLineX
 768          *                _____
 769          * --------------|  x  | <-- e.g. rectangular arrowhead
 770          *                -----
 771          */
 772         double x, y;
 773         GetPointOnLine(startPositionX, startPositionY,
 774                    positionOnLineX, positionOnLineY,
 775                    (double)(arrow->GetMetaFile()->m_width/2.0),
 776                    &x, &y);
 777
 778         // Calculate theta for rotating the metafile.
 779         /*
 780           |
 781           |     o(x2, y2)   'o' represents the arrowhead.
 782           |    /
 783           |   /
 784           |  /theta
 785           | /(x1, y1)
 786           |______________________
 787         */
 788         double theta = 0.0;
 789         double x1 = startPositionX;
 790         double y1 = startPositionY;
 791         double x2 = positionOnLineX;
 792         double y2 = positionOnLineY;
 793
 794         if ((x1 == x2) && (y1 == y2))
 795           theta = 0.0;
 796
 797         else if ((x1 == x2) && (y1 > y2))
 798           theta = (double)(3.0*myPi/2.0);
 799
 800         else if ((x1 == x2) && (y2 > y1))
 801           theta = (double)(myPi/2.0);
 802
 803         else if ((x2 > x1) && (y2 >= y1))
 804           theta = (double)atan((y2 - y1)/(x2 - x1));
 805
 806         else if (x2 < x1)
 807           theta = (double)(myPi + atan((y2 - y1)/(x2 - x1)));
 808
 809         else if ((x2 > x1) && (y2 < y1))
 810           theta = (double)(2*myPi + atan((y2 - y1)/(x2 - x1)));
 811
 812         else
 813         {
 814           wxLogFatalError(wxT("Unknown arrowhead rotation case in lines.cc"));
 815         }
 816
 817         // Rotate about the centre of the object, then place
 818         // the object on the line.
 819         if (arrow->GetMetaFile()->GetRotateable())
 820           arrow->GetMetaFile()->Rotate(0.0, 0.0, theta);
 821
 822         if (m_erasing)
 823         {
 824           // If erasing, just draw a rectangle.
 825           double minX, minY, maxX, maxY;
 826           arrow->GetMetaFile()->GetBounds(&minX, &minY, &maxX, &maxY);
 827           // Make erasing rectangle slightly bigger or you get droppings.
 828           int extraPixels = 4;
 829           dc.DrawRectangle((long)(deltaX + x + minX - (extraPixels/2.0)), (long)(deltaY + y + minY - (extraPixels/2.0)),
 830                            (long)(maxX - minX + extraPixels), (long)(maxY - minY + extraPixels));
 831         }
 832         else
 833           arrow->GetMetaFile()->Draw(dc, x+deltaX, y+deltaY);
 834       }
 835       break;
 836     }
 837     default:
 838     {
 839     }
 840   }
 841 }
 842
 843 void wxLineShape::OnErase(wxDC& dc)
 844 {
 845     wxPen *old_pen = m_pen;
 846     wxBrush *old_brush = m_brush;
 847     wxPen bg_pen = GetBackgroundPen();
 848     wxBrush bg_brush = GetBackgroundBrush();
 849     SetPen(&bg_pen);
 850     SetBrush(&bg_brush);
 851
 852     double bound_x, bound_y;
 853     GetBoundingBoxMax(&bound_x, &bound_y);
 854     if (m_font) dc.SetFont(* m_font);
 855
 856     // Undraw text regions
 857     for (int i = 0; i < 3; i++)
 858     {
 859       wxNode *node = m_regions.Item(i);
 860       if (node)
 861       {
 862         double x, y;
 863         wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 864         GetLabelPosition(i, &x, &y);
 865         EraseRegion(dc, region, x, y);
 866       }
 867     }
 868
 869     // Undraw line
 870     dc.SetPen(GetBackgroundPen());
 871     dc.SetBrush(GetBackgroundBrush());
 872
 873     // Drawing over the line only seems to work if the line has a thickness
 874     // of 1.
 875     if (old_pen && (old_pen->GetWidth() > 1))
 876     {
 877       dc.DrawRectangle((long)(m_xpos - (bound_x/2.0) - 2.0), (long)(m_ypos - (bound_y/2.0) - 2.0),
 878                         (long)(bound_x+4.0),  (long)(bound_y+4.0));
 879     }
 880     else
 881     {
 882       m_erasing = TRUE;
 883       GetEventHandler()->OnDraw(dc);
 884       GetEventHandler()->OnEraseControlPoints(dc);
 885       m_erasing = FALSE;
 886     }
 887
 888     if (old_pen) SetPen(old_pen);
 889     if (old_brush) SetBrush(old_brush);
 890 }
 891
 892 void wxLineShape::GetBoundingBoxMin(double *w, double *h)
 893 {
 894   double x1 = 10000;
 895   double y1 = 10000;
 896   double x2 = -10000;
 897   double y2 = -10000;
 898
 899   wxNode *node = m_lineControlPoints->GetFirst();
 900   while (node)
 901   {
 902     wxRealPoint *point = (wxRealPoint *)node->GetData();
 903
 904     if (point->x < x1) x1 = point->x;
 905     if (point->y < y1) y1 = point->y;
 906     if (point->x > x2) x2 = point->x;
 907     if (point->y > y2) y2 = point->y;
 908
 909     node = node->GetNext();
 910   }
 911   *w = (double)(x2 - x1);
 912   *h = (double)(y2 - y1);
 913 }
 914
 915 /*
 916  * For a node image of interest, finds the position of this arc
 917  * amongst all the arcs which are attached to THIS SIDE of the node image,
 918  * and the number of same.
 919  */
 920 void wxLineShape::FindNth(wxShape *image, int *nth, int *no_arcs, bool incoming)
 921 {
 922   int n = -1;
 923   int num = 0;
 924   wxNode *node = image->GetLines().GetFirst();
 925   int this_attachment;
 926   if (image == m_to)
 927     this_attachment = m_attachmentTo;
 928   else
 929     this_attachment = m_attachmentFrom;
 930
 931   // Find number of lines going into/out of this particular attachment point
 932   while (node)
 933   {
 934     wxLineShape *line = (wxLineShape *)node->GetData();
 935
 936     if (line->m_from == image)
 937     {
 938       // This is the nth line attached to 'image'
 939       if ((line == this) && !incoming)
 940         n = num;
 941
 942       // Increment num count if this is the same side (attachment number)
 943       if (line->m_attachmentFrom == this_attachment)
 944         num ++;
 945     }
 946
 947     if (line->m_to == image)
 948     {
 949       // This is the nth line attached to 'image'
 950       if ((line == this) && incoming)
 951         n = num;
 952
 953       // Increment num count if this is the same side (attachment number)
 954       if (line->m_attachmentTo == this_attachment)
 955         num ++;
 956     }
 957
 958     node = node->GetNext();
 959   }
 960   *nth = n;
 961   *no_arcs = num;
 962 }
 963
 964 void wxLineShape::OnDrawOutline(wxDC& dc, double WXUNUSED(x), double WXUNUSED(y), double WXUNUSED(w), double WXUNUSED(h))
 965 {
 966   wxPen *old_pen = m_pen;
 967   wxBrush *old_brush = m_brush;
 968
 969   wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 970   SetPen(& dottedPen);
 971   SetBrush( wxTRANSPARENT_BRUSH );
 972
 973   GetEventHandler()->OnDraw(dc);
 974
 975   if (old_pen) SetPen(old_pen);
 976   else SetPen(NULL);
 977   if (old_brush) SetBrush(old_brush);
 978   else SetBrush(NULL);
 979 }
 980
 981 bool wxLineShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool WXUNUSED(display))
 982 {
 983   double x_offset = x - old_x;
 984   double y_offset = y - old_y;
 985
 986   if (m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
 987   {
 988     wxNode *node = m_lineControlPoints->GetFirst();
 989     while (node)
 990     {
 991       wxRealPoint *point = (wxRealPoint *)node->GetData();
 992       point->x += x_offset;
 993       point->y += y_offset;
 994       node = node->GetNext();
 995     }
 996
 997   }
 998
 999   // Move temporary label rectangles if necessary
1000   for (int i = 0; i < 3; i++)
1001   {
1002     if (m_labelObjects[i])
1003     {
1004       m_labelObjects[i]->Erase(dc);
1005       double xp, yp, xr, yr;
1006       GetLabelPosition(i, &xp, &yp);
1007       wxNode *node = m_regions.Item(i);
1008       if (node)
1009       {
1010         wxShapeRegion *region = (wxShapeRegion *)node->GetData();
1011         region->GetPosition(&xr, &yr);
1012       }
1013       else
1014       {
1015         xr = 0.0; yr = 0.0;
1016       }
1017
1018       m_labelObjects[i]->Move(dc, xp+xr, yp+yr);
1019     }
1020   }
1021   return TRUE;
1022 }
1023
1024 void wxLineShape::OnMoveLink(wxDC& dc, bool moveControlPoints)
1025 {
1026   if (!m_from || !m_to)
1027    return;
1028
1029     if (m_lineControlPoints->GetCount() > 2)
1030       Initialise();
1031
1032     // Do each end - nothing in the middle. User has to move other points
1033     // manually if necessary.
1034     double end_x, end_y;
1035     double other_end_x, other_end_y;
1036
1037     FindLineEndPoints(&end_x, &end_y, &other_end_x, &other_end_y);
1038
1039     wxNode *first = m_lineControlPoints->GetFirst();
1040     /* wxRealPoint *first_point = */ (wxRealPoint *)first->GetData();
1041     wxNode *last = m_lineControlPoints->GetLast();
1042     /* wxRealPoint *last_point = */ (wxRealPoint *)last->GetData();
1043
1044 /* This is redundant, surely? Done by SetEnds.
1045     first_point->x = end_x; first_point->y = end_y;
1046     last_point->x = other_end_x; last_point->y = other_end_y;
1047 */
1048
1049     double oldX = m_xpos;
1050     double oldY = m_ypos;
1051
1052     SetEnds(end_x, end_y, other_end_x, other_end_y);
1053
1054     // Do a second time, because one may depend on the other.
1055     FindLineEndPoints(&end_x, &end_y, &other_end_x, &other_end_y);
1056     SetEnds(end_x, end_y, other_end_x, other_end_y);
1057
1058     // Try to move control points with the arc
1059     double x_offset = m_xpos - oldX;
1060     double y_offset = m_ypos - oldY;
1061
1062 //    if (moveControlPoints && m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
1063     // Only move control points if it's a self link. And only works if attachment mode is ON.
1064     if ((m_from == m_to) && (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE) && moveControlPoints && m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
1065     {
1066       wxNode *node = m_lineControlPoints->GetFirst();
1067       while (node)
1068       {
1069         if ((node != m_lineControlPoints->GetFirst()) && (node != m_lineControlPoints->GetLast()))
1070         {
1071           wxRealPoint *point = (wxRealPoint *)node->GetData();
1072           point->x += x_offset;
1073           point->y += y_offset;
1074         }
1075         node = node->GetNext();
1076       }
1077     }
1078
1079     Move(dc, m_xpos, m_ypos);
1080 }
1081
1082 // Finds the x, y points at the two ends of the line.
1083 // This function can be used by e.g. line-routing routines to
1084 // get the actual points on the two node images where the lines will be drawn
1085 // to/from.
1086 void wxLineShape::FindLineEndPoints(double *fromX, double *fromY, double *toX, double *toY)
1087 {
1088   if (!m_from || !m_to)
1089    return;
1090
1091   // Do each end - nothing in the middle. User has to move other points
1092   // manually if necessary.
1093   double end_x, end_y;
1094   double other_end_x, other_end_y;
1095
1096   wxNode *first = m_lineControlPoints->GetFirst();
1097   /* wxRealPoint *first_point = */ (wxRealPoint *)first->GetData();
1098   wxNode *last = m_lineControlPoints->GetLast();
1099   /* wxRealPoint *last_point = */ (wxRealPoint *)last->GetData();
1100
1101   wxNode *second = first->GetNext();
1102   wxRealPoint *second_point = (wxRealPoint *)second->GetData();
1103
1104   wxNode *second_last = last->GetPrevious();
1105   wxRealPoint *second_last_point = (wxRealPoint *)second_last->GetData();
1106
1107   if (m_lineControlPoints->GetCount() > 2)
1108   {
1109     if (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1110     {
1111       int nth, no_arcs;
1112       FindNth(m_from, &nth, &no_arcs, FALSE); // Not incoming
1113       m_from->GetAttachmentPosition(m_attachmentFrom, &end_x, &end_y, nth, no_arcs, this);
1114     }
1115     else
1116       (void) m_from->GetPerimeterPoint(m_from->GetX(), m_from->GetY(),
1117                                    (double)second_point->x, (double)second_point->y,
1118                                     &end_x, &end_y);
1119
1120     if (m_to->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1121     {
1122       int nth, no_arcs;
1123       FindNth(m_to, &nth, &no_arcs, TRUE); // Incoming
1124       m_to->GetAttachmentPosition(m_attachmentTo, &other_end_x, &other_end_y, nth, no_arcs, this);
1125     }
1126     else
1127       (void) m_to->GetPerimeterPoint(m_to->GetX(), m_to->GetY(),
1128                                 (double)second_last_point->x, (double)second_last_point->y,
1129                                 &other_end_x, &other_end_y);
1130   }
1131   else
1132   {
1133     double fromX = m_from->GetX();
1134     double fromY = m_from->GetY();
1135     double toX = m_to->GetX();
1136     double toY = m_to->GetY();
1137
1138     if (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1139     {
1140       int nth, no_arcs;
1141       FindNth(m_from, &nth, &no_arcs, FALSE);
1142       m_from->GetAttachmentPosition(m_attachmentFrom, &end_x, &end_y, nth, no_arcs, this);
1143       fromX = end_x;
1144       fromY = end_y;
1145     }
1146
1147     if (m_to->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1148     {
1149       int nth, no_arcs;
1150       FindNth(m_to, &nth, &no_arcs, TRUE);
1151       m_to->GetAttachmentPosition(m_attachmentTo, &other_end_x, &other_end_y, nth, no_arcs, this);
1152       toX = other_end_x;
1153       toY = other_end_y;
1154     }
1155
1156     if (m_from->GetAttachmentMode() == ATTACHMENT_MODE_NONE)
1157       (void) m_from->GetPerimeterPoint(m_from->GetX(), m_from->GetY(),
1158                                   toX, toY,
1159                                   &end_x, &end_y);
1160
1161     if (m_to->GetAttachmentMode() == ATTACHMENT_MODE_NONE)
1162       (void) m_to->GetPerimeterPoint(m_to->GetX(), m_to->GetY(),
1163                                 fromX, fromY,
1164                                 &other_end_x, &other_end_y);
1165   }
1166   *fromX = end_x;
1167   *fromY = end_y;
1168   *toX = other_end_x;
1169   *toY = other_end_y;
1170 }
1171
1172 void wxLineShape::OnDraw(wxDC& dc)
1173 {
1174   if (m_lineControlPoints)
1175   {
1176     if (m_pen)
1177       dc.SetPen(* m_pen);
1178     if (m_brush)
1179       dc.SetBrush(* m_brush);
1180
1181     int n = m_lineControlPoints->GetCount();
1182     wxPoint *points = new wxPoint[n];
1183     int i;
1184     for (i = 0; i < n; i++)
1185     {
1186         wxRealPoint* point = (wxRealPoint*) m_lineControlPoints->Item(i)->GetData();
1187         points[i].x = WXROUND(point->x);
1188         points[i].y = WXROUND(point->y);
1189     }
1190
1191     if (m_isSpline)
1192       dc.DrawSpline(n, points);
1193     else
1194       dc.DrawLines(n, points);
1195
1196 #ifdef __WXMSW__
1197     // For some reason, last point isn't drawn under Windows.
1198     dc.DrawPoint(points[n-1]);
1199 #endif
1200
1201     delete[] points;
1202
1203
1204     // Problem with pen - if not a solid pen, does strange things
1205     // to the arrowhead. So make (get) a new pen that's solid.
1206     if (m_pen && (m_pen->GetStyle() != wxSOLID))
1207     {
1208       wxPen *solid_pen =
1209         wxThePenList->FindOrCreatePen(m_pen->GetColour(), 1, wxSOLID);
1210       if (solid_pen)
1211         dc.SetPen(* solid_pen);
1212     }
1213     DrawArrows(dc);
1214   }
1215 }
1216
1217 void wxLineShape::OnDrawControlPoints(wxDC& dc)
1218 {
1219   if (!m_drawHandles)
1220     return;
1221
1222   // Draw temporary label rectangles if necessary
1223   for (int i = 0; i < 3; i++)
1224   {
1225     if (m_labelObjects[i])
1226       m_labelObjects[i]->Draw(dc);
1227   }
1228   wxShape::OnDrawControlPoints(dc);
1229 }
1230
1231 void wxLineShape::OnEraseControlPoints(wxDC& dc)
1232 {
1233   // Erase temporary label rectangles if necessary
1234   for (int i = 0; i < 3; i++)
1235   {
1236     if (m_labelObjects[i])
1237       m_labelObjects[i]->Erase(dc);
1238   }
1239   wxShape::OnEraseControlPoints(dc);
1240 }
1241
1242 void wxLineShape::OnDragLeft(bool WXUNUSED(draw), double WXUNUSED(x), double WXUNUSED(y), int WXUNUSED(keys), int WXUNUSED(attachment))
1243 {
1244 }
1245
1246 void wxLineShape::OnBeginDragLeft(double WXUNUSED(x), double WXUNUSED(y), int WXUNUSED(keys), int WXUNUSED(attachment))
1247 {
1248 }
1249
1250 void wxLineShape::OnEndDragLeft(double WXUNUSED(x), double WXUNUSED(y), int WXUNUSED(keys), int WXUNUSED(attachment))
1251 {
1252 }
1253
1254 /*
1255 void wxLineShape::SetArrowSize(double length, double width)
1256 {
1257   arrow_length = length;
1258   arrow_width = width;
1259 }
1260
1261 void wxLineShape::SetStartArrow(int style)
1262 {
1263   start_style = style;
1264 }
1265
1266 void wxLineShape::SetMiddleArrow(int style)
1267 {
1268   middle_style = style;
1269 }
1270
1271 void wxLineShape::SetEndArrow(int style)
1272 {
1273   end_style = style;
1274 }
1275 */
1276
1277 void wxLineShape::OnDrawContents(wxDC& dc)
1278 {
1279   if (GetDisableLabel())
1280     return;
1281
1282   for (int i = 0; i < 3; i++)
1283   {
1284     wxNode *node = m_regions.Item(i);
1285     if (node)
1286     {
1287       wxShapeRegion *region = (wxShapeRegion *)node->GetData();
1288       double x, y;
1289       GetLabelPosition(i, &x, &y);
1290       DrawRegion(dc, region, x, y);
1291     }
1292   }
1293 }
1294
1295 void wxLineShape::SetTo(wxShape *object)
1296 {
1297   m_to = object;
1298 }
1299
1300 void wxLineShape::SetFrom(wxShape *object)
1301 {
1302   m_from = object;
1303 }
1304
1305 void wxLineShape::MakeControlPoints()
1306 {
1307   if (m_canvas && m_lineControlPoints)
1308   {
1309     wxNode *first = m_lineControlPoints->GetFirst();
1310     wxNode *last = m_lineControlPoints->GetLast();
1311     wxRealPoint *first_point = (wxRealPoint *)first->GetData();
1312     wxRealPoint *last_point = (wxRealPoint *)last->GetData();
1313
1314     wxLineControlPoint *control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1315                                                first_point->x, first_point->y,
1316                                                CONTROL_POINT_ENDPOINT_FROM);
1317     control->m_point = first_point;
1318     m_canvas->AddShape(control);
1319     m_controlPoints.Append(control);
1320
1321
1322     wxNode *node = first->GetNext();
1323     while (node != last)
1324     {
1325       wxRealPoint *point = (wxRealPoint *)node->GetData();
1326
1327       control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1328                                                point->x, point->y,
1329                                                CONTROL_POINT_LINE);
1330       control->m_point = point;
1331
1332       m_canvas->AddShape(control);
1333       m_controlPoints.Append(control);
1334
1335       node = node->GetNext();
1336     }
1337     control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1338                                                last_point->x, last_point->y,
1339                                                CONTROL_POINT_ENDPOINT_TO);
1340     control->m_point = last_point;
1341     m_canvas->AddShape(control);
1342     m_controlPoints.Append(control);
1343
1344   }
1345
1346 }
1347
1348 void wxLineShape::ResetControlPoints()
1349 {
1350   if (m_canvas && m_lineControlPoints && m_controlPoints.GetCount() > 0)
1351   {
1352     wxNode *node = m_controlPoints.GetFirst();
1353     wxNode *control_node = m_lineControlPoints->GetFirst();
1354     while (node && control_node)
1355     {
1356       wxRealPoint *point = (wxRealPoint *)control_node->GetData();
1357       wxLineControlPoint *control = (wxLineControlPoint *)node->GetData();
1358       control->SetX(point->x);
1359       control->SetY(point->y);
1360
1361       node = node->GetNext();
1362       control_node = control_node->GetNext();
1363     }
1364   }
1365 }
1366
1367 #if wxUSE_PROLOGIO
1368 void wxLineShape::WriteAttributes(wxExpr *clause)
1369 {
1370   wxShape::WriteAttributes(clause);
1371
1372   if (m_from)
1373     clause->AddAttributeValue(_T("from"), m_from->GetId());
1374   if (m_to)
1375     clause->AddAttributeValue(_T("to"), m_to->GetId());
1376
1377   if (m_attachmentTo != 0)
1378     clause->AddAttributeValue(_T("attachment_to"), (long)m_attachmentTo);
1379   if (m_attachmentFrom != 0)
1380     clause->AddAttributeValue(_T("attachment_from"), (long)m_attachmentFrom);
1381
1382   if (m_alignmentStart != 0)
1383     clause->AddAttributeValue(_T("align_start"), (long)m_alignmentStart);
1384   if (m_alignmentEnd != 0)
1385     clause->AddAttributeValue(_T("align_end"), (long)m_alignmentEnd);
1386
1387   clause->AddAttributeValue(_T("is_spline"), (long)m_isSpline);
1388   if (m_maintainStraightLines)
1389     clause->AddAttributeValue(_T("keep_lines_straight"), (long)m_maintainStraightLines);
1390
1391   // Make a list of lists for the (sp)line controls
1392   wxExpr *list = new wxExpr(wxExprList);
1393   wxNode *node = m_lineControlPoints->GetFirst();
1394   while (node)
1395   {
1396     wxRealPoint *point = (wxRealPoint *)node->GetData();
1397     wxExpr *point_list = new wxExpr(wxExprList);
1398     wxExpr *x_expr = new wxExpr((double) point->x);
1399     wxExpr *y_expr = new wxExpr((double) point->y);
1400     point_list->Append(x_expr);
1401     point_list->Append(y_expr);
1402     list->Append(point_list);
1403
1404     node = node->GetNext();
1405   }
1406   clause->AddAttributeValue(_T("controls"), list);
1407
1408   // Write arc arrows in new OGL format, if there are any.
1409   // This is a list of lists. Each sublist comprises:
1410   // (arrowType arrowEnd xOffset arrowSize)
1411   if (m_arcArrows.GetCount() > 0)
1412   {
1413     wxExpr *arrow_list = new wxExpr(wxExprList);
1414     node = m_arcArrows.GetFirst();
1415     while (node)
1416     {
1417       wxArrowHead *head = (wxArrowHead *)node->GetData();
1418       wxExpr *head_list = new wxExpr(wxExprList);
1419       head_list->Append(new wxExpr((long)head->_GetType()));
1420       head_list->Append(new wxExpr((long)head->GetArrowEnd()));
1421       head_list->Append(new wxExpr(head->GetXOffset()));
1422       head_list->Append(new wxExpr(head->GetArrowSize()));
1423       head_list->Append(new wxExpr(wxExprString, head->GetName()));
1424       head_list->Append(new wxExpr(head->GetId()));
1425
1426       // New members of wxArrowHead
1427       head_list->Append(new wxExpr(head->GetYOffset()));
1428       head_list->Append(new wxExpr(head->GetSpacing()));
1429
1430       arrow_list->Append(head_list);
1431
1432       node = node->GetNext();
1433     }
1434     clause->AddAttributeValue(_T("arrows"), arrow_list);
1435   }
1436 }
1437
1438 void wxLineShape::ReadAttributes(wxExpr *clause)
1439 {
1440   wxShape::ReadAttributes(clause);
1441
1442   int iVal = (int) m_isSpline;
1443   clause->AssignAttributeValue(wxT("is_spline"), &iVal);
1444   m_isSpline = (iVal != 0);
1445
1446   iVal = (int) m_maintainStraightLines;
1447   clause->AssignAttributeValue(wxT("keep_lines_straight"), &iVal);
1448   m_maintainStraightLines = (iVal != 0);
1449
1450   clause->AssignAttributeValue(wxT("align_start"), &m_alignmentStart);
1451   clause->AssignAttributeValue(wxT("align_end"), &m_alignmentEnd);
1452
1453   // Compatibility: check for no regions.
1454   if (m_regions.GetCount() == 0)
1455   {
1456     wxShapeRegion *newRegion = new wxShapeRegion;
1457     newRegion->SetName(_T("Middle"));
1458     newRegion->SetSize(150, 50);
1459     m_regions.Append((wxObject *)newRegion);
1460     if (m_text.GetCount() > 0)
1461     {
1462       newRegion->ClearText();
1463       wxNode *node = m_text.GetFirst();
1464       while (node)
1465       {
1466         wxShapeTextLine *textLine = (wxShapeTextLine *)node->GetData();
1467         wxNode *next = node->GetNext();
1468         newRegion->GetFormattedText().Append((wxObject *)textLine);
1469         delete node;
1470         node = next;
1471       }
1472     }
1473
1474     newRegion = new wxShapeRegion;
1475     newRegion->SetName(wxT("Start"));
1476     newRegion->SetSize(150, 50);
1477     m_regions.Append((wxObject *)newRegion);
1478
1479     newRegion = new wxShapeRegion;
1480     newRegion->SetName(wxT("End"));
1481     newRegion->SetSize(150, 50);
1482     m_regions.Append((wxObject *)newRegion);
1483   }
1484
1485   m_attachmentTo = 0;
1486   m_attachmentFrom = 0;
1487
1488   clause->AssignAttributeValue(wxT("attachment_to"), &m_attachmentTo);
1489   clause->AssignAttributeValue(wxT("attachment_from"), &m_attachmentFrom);
1490
1491   wxExpr *line_list = NULL;
1492
1493   // When image is created, there are default control points. Override
1494   // them if there are some in the file.
1495   clause->AssignAttributeValue(wxT("controls"), &line_list);
1496
1497   if (line_list)
1498   {
1499     // Read a list of lists for the spline controls
1500     if (m_lineControlPoints)
1501     {
1502       ClearPointList(*m_lineControlPoints);
1503     }
1504     else
1505       m_lineControlPoints = new wxList;
1506
1507     wxExpr *node = line_list->value.first;
1508
1509     while (node)
1510     {
1511       wxExpr *xexpr = node->value.first;
1512       double x = xexpr->RealValue();
1513
1514       wxExpr *yexpr = xexpr->next;
1515       double y = yexpr->RealValue();
1516
1517       wxRealPoint *point = new wxRealPoint(x, y);
1518       m_lineControlPoints->Append((wxObject*) point);
1519
1520       node = node->next;
1521     }
1522   }
1523
1524   // Read arrow list, for new OGL code
1525   wxExpr *arrow_list = NULL;
1526
1527   clause->AssignAttributeValue(wxT("arrows"), &arrow_list);
1528   if (arrow_list)
1529   {
1530     wxExpr *node = arrow_list->value.first;
1531
1532     while (node)
1533     {
1534       WXTYPE arrowType = ARROW_ARROW;
1535       int arrowEnd = 0;
1536       double xOffset = 0.0;
1537       double arrowSize = 0.0;
1538       wxString arrowName;
1539       long arrowId = -1;
1540
1541       wxExpr *type_expr = node->Nth(0);
1542       wxExpr *end_expr = node->Nth(1);
1543       wxExpr *dist_expr = node->Nth(2);
1544       wxExpr *size_expr = node->Nth(3);
1545       wxExpr *name_expr = node->Nth(4);
1546       wxExpr *id_expr = node->Nth(5);
1547
1548       // New members of wxArrowHead
1549       wxExpr *yOffsetExpr = node->Nth(6);
1550       wxExpr *spacingExpr = node->Nth(7);
1551
1552       if (type_expr)
1553         arrowType = (int)type_expr->IntegerValue();
1554       if (end_expr)
1555         arrowEnd = (int)end_expr->IntegerValue();
1556       if (dist_expr)
1557         xOffset = dist_expr->RealValue();
1558       if (size_expr)
1559         arrowSize = size_expr->RealValue();
1560       if (name_expr)
1561         arrowName = name_expr->StringValue();
1562       if (id_expr)
1563         arrowId = id_expr->IntegerValue();
1564
1565       if (arrowId == -1)
1566         arrowId = wxNewId();
1567       else
1568         wxRegisterId(arrowId);
1569
1570       wxArrowHead *arrowHead = AddArrow(arrowType, arrowEnd, arrowSize, xOffset, arrowName, NULL, arrowId);
1571       if (yOffsetExpr)
1572         arrowHead->SetYOffset(yOffsetExpr->RealValue());
1573       if (spacingExpr)
1574         arrowHead->SetSpacing(spacingExpr->RealValue());
1575
1576       node = node->next;
1577     }
1578   }
1579 }
1580 #endif
1581
1582 void wxLineShape::Copy(wxShape& copy)
1583 {
1584   wxShape::Copy(copy);
1585
1586   wxASSERT( copy.IsKindOf(CLASSINFO(wxLineShape)) );
1587
1588   wxLineShape& lineCopy = (wxLineShape&) copy;
1589
1590   lineCopy.m_to = m_to;
1591   lineCopy.m_from = m_from;
1592   lineCopy.m_attachmentTo = m_attachmentTo;
1593   lineCopy.m_attachmentFrom = m_attachmentFrom;
1594   lineCopy.m_isSpline = m_isSpline;
1595   lineCopy.m_alignmentStart = m_alignmentStart;
1596   lineCopy.m_alignmentEnd = m_alignmentEnd;
1597   lineCopy.m_maintainStraightLines = m_maintainStraightLines;
1598   lineCopy.m_lineOrientations.Clear();
1599
1600   wxNode *node = m_lineOrientations.GetFirst();
1601   while (node)
1602   {
1603     lineCopy.m_lineOrientations.Append(node->GetData());
1604     node = node->GetNext();
1605   }
1606
1607   if (lineCopy.m_lineControlPoints)
1608   {
1609     ClearPointList(*lineCopy.m_lineControlPoints);
1610     delete lineCopy.m_lineControlPoints;
1611   }
1612
1613   lineCopy.m_lineControlPoints = new wxList;
1614
1615   node = m_lineControlPoints->GetFirst();
1616   while (node)
1617   {
1618     wxRealPoint *point = (wxRealPoint *)node->GetData();
1619     wxRealPoint *new_point = new wxRealPoint(point->x, point->y);
1620     lineCopy.m_lineControlPoints->Append((wxObject*) new_point);
1621     node = node->GetNext();
1622   }
1623
1624   // Copy arrows
1625   lineCopy.ClearArrowsAtPosition(-1);
1626   node = m_arcArrows.GetFirst();
1627   while (node)
1628   {
1629     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
1630     lineCopy.m_arcArrows.Append(new wxArrowHead(*arrow));
1631     node = node->GetNext();
1632   }
1633 }
1634
1635 // Override select, to create/delete temporary label-moving objects
1636 void wxLineShape::Select(bool select, wxDC* dc)
1637 {
1638   wxShape::Select(select, dc);
1639   if (select)
1640   {
1641     for (int i = 0; i < 3; i++)
1642     {
1643       wxNode *node = m_regions.Item(i);
1644       if (node)
1645       {
1646         wxShapeRegion *region = (wxShapeRegion *)node->GetData();
1647         if (region->m_formattedText.GetCount() > 0)
1648         {
1649           double w, h, x, y, xx, yy;
1650           region->GetSize(&w, &h);
1651           region->GetPosition(&x, &y);
1652           GetLabelPosition(i, &xx, &yy);
1653           if (m_labelObjects[i])
1654           {
1655             m_labelObjects[i]->Select(FALSE);
1656             m_labelObjects[i]->RemoveFromCanvas(m_canvas);
1657             delete m_labelObjects[i];
1658           }
1659           m_labelObjects[i] = OnCreateLabelShape(this, region, w, h);
1660           m_labelObjects[i]->AddToCanvas(m_canvas);
1661           m_labelObjects[i]->Show(TRUE);
1662           if (dc)
1663             m_labelObjects[i]->Move(*dc, (double)(x + xx), (double)(y + yy));
1664           m_labelObjects[i]->Select(TRUE, dc);
1665         }
1666       }
1667     }
1668   }
1669   else
1670   {
1671     for (int i = 0; i < 3; i++)
1672     {
1673       if (m_labelObjects[i])
1674       {
1675         m_labelObjects[i]->Select(FALSE, dc);
1676         m_labelObjects[i]->Erase(*dc);
1677         m_labelObjects[i]->RemoveFromCanvas(m_canvas);
1678         delete m_labelObjects[i];
1679         m_labelObjects[i] = NULL;
1680       }
1681     }
1682   }
1683 }
1684
1685 /*
1686  * Line control point
1687  *
1688  */
1689
1690 IMPLEMENT_DYNAMIC_CLASS(wxLineControlPoint, wxControlPoint)
1691
1692 wxLineControlPoint::wxLineControlPoint(wxShapeCanvas *theCanvas, wxShape *object, double size, double x, double y, int the_type):
1693   wxControlPoint(theCanvas, object, size, x, y, the_type)
1694 {
1695   m_xpos = x;
1696   m_ypos = y;
1697   m_type = the_type;
1698   m_point = NULL;
1699 }
1700
1701 wxLineControlPoint::~wxLineControlPoint()
1702 {
1703 }
1704
1705 void wxLineControlPoint::OnDraw(wxDC& dc)
1706 {
1707   wxRectangleShape::OnDraw(dc);
1708 }
1709
1710 // Implement movement of Line point
1711 void wxLineControlPoint::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
1712 {
1713     m_shape->GetEventHandler()->OnSizingDragLeft(this, draw, x, y, keys, attachment);
1714 }
1715
1716 void wxLineControlPoint::OnBeginDragLeft(double x, double y, int keys, int attachment)
1717 {
1718     m_shape->GetEventHandler()->OnSizingBeginDragLeft(this, x, y, keys, attachment);
1719 }
1720
1721 void wxLineControlPoint::OnEndDragLeft(double x, double y, int keys, int attachment)
1722 {
1723     m_shape->GetEventHandler()->OnSizingEndDragLeft(this, x, y, keys, attachment);
1724 }
1725
1726 // Control points ('handles') redirect control to the actual shape, to make it easier
1727 // to override sizing behaviour.
1728 void wxLineShape::OnSizingDragLeft(wxControlPoint* pt, bool WXUNUSED(draw), double x, double y, int WXUNUSED(keys), int WXUNUSED(attachment))
1729 {
1730   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1731
1732   wxClientDC dc(GetCanvas());
1733   GetCanvas()->PrepareDC(dc);
1734
1735   dc.SetLogicalFunction(OGLRBLF);
1736
1737   wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1738   dc.SetPen(dottedPen);
1739   dc.SetBrush((* wxTRANSPARENT_BRUSH));
1740
1741   if (lpt->m_type == CONTROL_POINT_LINE)
1742   {
1743     m_canvas->Snap(&x, &y);
1744
1745     lpt->SetX(x); lpt->SetY(y);
1746     lpt->m_point->x = x; lpt->m_point->y = y;
1747
1748     wxLineShape *lineShape = (wxLineShape *)this;
1749
1750     wxPen *old_pen = lineShape->GetPen();
1751     wxBrush *old_brush = lineShape->GetBrush();
1752
1753     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1754     lineShape->SetPen(& dottedPen);
1755     lineShape->SetBrush(wxTRANSPARENT_BRUSH);
1756
1757     lineShape->GetEventHandler()->OnMoveLink(dc, FALSE);
1758
1759     lineShape->SetPen(old_pen);
1760     lineShape->SetBrush(old_brush);
1761   }
1762
1763   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM || lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1764   {
1765 //    lpt->SetX(x); lpt->SetY(y);
1766   }
1767
1768 }
1769
1770 void wxLineShape::OnSizingBeginDragLeft(wxControlPoint* pt, double x, double y, int WXUNUSED(keys), int WXUNUSED(attachment))
1771 {
1772   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1773
1774   wxClientDC dc(GetCanvas());
1775   GetCanvas()->PrepareDC(dc);
1776
1777   wxLineShape *lineShape = (wxLineShape *)this;
1778   if (lpt->m_type == CONTROL_POINT_LINE)
1779   {
1780     lpt->m_originalPos = * (lpt->m_point);
1781     m_canvas->Snap(&x, &y);
1782
1783     this->Erase(dc);
1784
1785     // Redraw start and end objects because we've left holes
1786     // when erasing the line
1787     lineShape->GetFrom()->OnDraw(dc);
1788     lineShape->GetFrom()->OnDrawContents(dc);
1789     lineShape->GetTo()->OnDraw(dc);
1790     lineShape->GetTo()->OnDrawContents(dc);
1791
1792     this->SetDisableLabel(TRUE);
1793     dc.SetLogicalFunction(OGLRBLF);
1794
1795     lpt->m_xpos = x; lpt->m_ypos = y;
1796     lpt->m_point->x = x; lpt->m_point->y = y;
1797
1798     wxPen *old_pen = lineShape->GetPen();
1799     wxBrush *old_brush = lineShape->GetBrush();
1800
1801     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1802     lineShape->SetPen(& dottedPen);
1803     lineShape->SetBrush(wxTRANSPARENT_BRUSH);
1804
1805     lineShape->GetEventHandler()->OnMoveLink(dc, FALSE);
1806
1807     lineShape->SetPen(old_pen);
1808     lineShape->SetBrush(old_brush);
1809   }
1810
1811   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM || lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1812   {
1813     m_canvas->SetCursor(wxCursor(wxCURSOR_BULLSEYE));
1814     lpt->m_oldCursor = wxSTANDARD_CURSOR;
1815   }
1816 }
1817
1818 void wxLineShape::OnSizingEndDragLeft(wxControlPoint* pt, double x, double y, int WXUNUSED(keys), int WXUNUSED(attachment))
1819 {
1820   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1821
1822   wxClientDC dc(GetCanvas());
1823   GetCanvas()->PrepareDC(dc);
1824
1825   this->SetDisableLabel(FALSE);
1826   wxLineShape *lineShape = (wxLineShape *)this;
1827
1828   if (lpt->m_type == CONTROL_POINT_LINE)
1829   {
1830     m_canvas->Snap(&x, &y);
1831
1832     wxRealPoint pt = wxRealPoint(x, y);
1833
1834     // Move the control point back to where it was;
1835     // MoveControlPoint will move it to the new position
1836     // if it decides it wants. We only moved the position
1837     // during user feedback so we could redraw the line
1838     // as it changed shape.
1839     lpt->m_xpos = lpt->m_originalPos.x; lpt->m_ypos = lpt->m_originalPos.y;
1840     lpt->m_point->x = lpt->m_originalPos.x; lpt->m_point->y = lpt->m_originalPos.y;
1841
1842     OnMoveMiddleControlPoint(dc, lpt, pt);
1843   }
1844   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM)
1845   {
1846     if (lpt->m_oldCursor)
1847       m_canvas->SetCursor(* lpt->m_oldCursor);
1848
1849 //    this->Erase(dc);
1850
1851 //    lpt->m_xpos = x; lpt->m_ypos = y;
1852
1853     if (lineShape->GetFrom())
1854     {
1855       lineShape->GetFrom()->MoveLineToNewAttachment(dc, lineShape, x, y);
1856     }
1857   }
1858   if (lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1859   {
1860     if (lpt->m_oldCursor)
1861       m_canvas->SetCursor(* lpt->m_oldCursor);
1862
1863 //    lpt->m_xpos = x; lpt->m_ypos = y;
1864
1865     if (lineShape->GetTo())
1866     {
1867       lineShape->GetTo()->MoveLineToNewAttachment(dc, lineShape, x, y);
1868     }
1869   }
1870
1871   // Needed?
1872 #if 0
1873   int i = 0;
1874   for (i = 0; i < lineShape->GetLineControlPoints()->GetCount(); i++)
1875     if (((wxRealPoint *)(lineShape->GetLineControlPoints()->Item(i)->GetData())) == lpt->m_point)
1876       break;
1877
1878   // N.B. in OnMoveControlPoint, an event handler in Hardy could have deselected
1879   // the line and therefore deleted 'this'. -> GPF, intermittently.
1880   // So assume at this point that we've been blown away.
1881
1882   lineShape->OnMoveControlPoint(i+1, x, y);
1883 #endif
1884 }
1885
1886 // This is called only when a non-end control point is moved.
1887 bool wxLineShape::OnMoveMiddleControlPoint(wxDC& dc, wxLineControlPoint* lpt, const wxRealPoint& pt)
1888 {
1889     lpt->m_xpos = pt.x; lpt->m_ypos = pt.y;
1890     lpt->m_point->x = pt.x; lpt->m_point->y = pt.y;
1891
1892     GetEventHandler()->OnMoveLink(dc);
1893
1894     return TRUE;
1895 }
1896
1897 // Implement movement of endpoint to a new attachment
1898 // OBSOLETE: done by dragging with the left button.
1899
1900 #if 0
1901 void wxLineControlPoint::OnDragRight(bool draw, double x, double y, int keys, int attachment)
1902 {
1903   if (m_type == CONTROL_POINT_ENDPOINT_FROM || m_type == CONTROL_POINT_ENDPOINT_TO)
1904   {
1905     m_xpos = x; m_ypos = y;
1906   }
1907 }
1908
1909 void wxLineControlPoint::OnBeginDragRight(double x, double y, int keys, int attachment)
1910 {
1911   wxClientDC dc(GetCanvas());
1912   GetCanvas()->PrepareDC(dc);
1913
1914   wxLineShape *lineShape = (wxLineShape *)m_shape;
1915   if (m_type == CONTROL_POINT_ENDPOINT_FROM || m_type == CONTROL_POINT_ENDPOINT_TO)
1916   {
1917     Erase(dc);
1918     lineShape->GetEventHandler()->OnDraw(dc);
1919     if (m_type == CONTROL_POINT_ENDPOINT_FROM)
1920     {
1921       lineShape->GetFrom()->GetEventHandler()->OnDraw(dc);
1922       lineShape->GetFrom()->GetEventHandler()->OnDrawContents(dc);
1923     }
1924     else
1925     {
1926       lineShape->GetTo()->GetEventHandler()->OnDraw(dc);
1927       lineShape->GetTo()->GetEventHandler()->OnDrawContents(dc);
1928     }
1929     m_canvas->SetCursor(wxCursor(wxCURSOR_BULLSEYE));
1930     m_oldCursor = wxSTANDARD_CURSOR;
1931   }
1932 }
1933
1934 void wxLineControlPoint::OnEndDragRight(double x, double y, int keys, int attachment)
1935 {
1936   wxClientDC dc(GetCanvas());
1937   GetCanvas()->PrepareDC(dc);
1938
1939   wxLineShape *lineShape = (wxLineShape *)m_shape;
1940   if (m_type == CONTROL_POINT_ENDPOINT_FROM)
1941   {
1942     if (m_oldCursor)
1943       m_canvas->SetCursor(m_oldCursor);
1944
1945     m_xpos = x; m_ypos = y;
1946
1947     if (lineShape->GetFrom())
1948     {
1949       lineShape->GetFrom()->EraseLinks(dc);
1950
1951       int new_attachment;
1952       double distance;
1953
1954       if (lineShape->GetFrom()->HitTest(x, y, &new_attachment, &distance))
1955         lineShape->SetAttachments(new_attachment, lineShape->GetAttachmentTo());
1956
1957       lineShape->GetFrom()->MoveLinks(dc);
1958     }
1959   }
1960   if (m_type == CONTROL_POINT_ENDPOINT_TO)
1961   {
1962     if (m_oldCursor)
1963       m_canvas->SetCursor(m_oldCursor);
1964     m_shape->Erase(dc);
1965
1966     m_xpos = x; m_ypos = y;
1967
1968     if (lineShape->GetTo())
1969     {
1970       lineShape->GetTo()->EraseLinks(dc);
1971
1972       int new_attachment;
1973       double distance;
1974       if (lineShape->GetTo()->HitTest(x, y, &new_attachment, &distance))
1975         lineShape->SetAttachments(lineShape->GetAttachmentFrom(), new_attachment);
1976
1977       lineShape->GetTo()->MoveLinks(dc);
1978     }
1979   }
1980   int i = 0;
1981   for (i = 0; i < lineShape->GetLineControlPoints()->GetCount(); i++)
1982     if (((wxRealPoint *)(lineShape->GetLineControlPoints()->Item(i)->GetData())) == m_point)
1983       break;
1984   lineShape->OnMoveControlPoint(i+1, x, y);
1985   if (!m_canvas->GetQuickEditMode()) m_canvas->Redraw(dc);
1986 }
1987 #endif
1988
1989 /*
1990  * Get the point on the given line (x1, y1) (x2, y2)
1991  * distance 'length' along from the end,
1992  * returned values in x and y
1993  */
1994
1995 void GetPointOnLine(double x1, double y1, double x2, double y2,
1996                     double length, double *x, double *y)
1997 {
1998   double l = (double)sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1));
1999
2000   if (l < 0.01)
2001     l = (double) 0.01;
2002
2003   double i_bar = (x2 - x1)/l;
2004   double j_bar = (y2 - y1)/l;
2005
2006   *x = (- length*i_bar) + x2;
2007   *y = (- length*j_bar) + y2;
2008 }
2009
2010 wxArrowHead *wxLineShape::AddArrow(WXTYPE type, int end, double size, double xOffset,
2011     const wxString& name, wxPseudoMetaFile *mf, long arrowId)
2012 {
2013   wxArrowHead *arrow = new wxArrowHead(type, end, size, xOffset, name, mf, arrowId);
2014   m_arcArrows.Append(arrow);
2015   return arrow;
2016 }
2017
2018 /*
2019  * Add arrowhead at a particular position in the arrowhead list.
2020  */
2021 bool wxLineShape::AddArrowOrdered(wxArrowHead *arrow, wxList& referenceList, int end)
2022 {
2023   wxNode *refNode = referenceList.GetFirst();
2024   wxNode *currNode = m_arcArrows.GetFirst();
2025   wxString targetName(arrow->GetName());
2026   if (!refNode) return FALSE;
2027
2028   // First check whether we need to insert in front of list,
2029   // because this arrowhead is the first in the reference
2030   // list and should therefore be first in the current list.
2031   wxArrowHead *refArrow = (wxArrowHead *)refNode->GetData();
2032   if (refArrow->GetName() == targetName)
2033   {
2034     m_arcArrows.Insert(arrow);
2035     return TRUE;
2036   }
2037
2038   wxArrowHead *currArrow = (wxArrowHead *)currNode->GetData();
2039   while (refNode && currNode)
2040   {
2041     refArrow = (wxArrowHead *)refNode->GetData();
2042
2043     // Matching: advance current arrow pointer
2044     if ((currArrow->GetArrowEnd() == end) &&
2045         (currArrow->GetName() == refArrow->GetName()))
2046     {
2047       currNode = currNode->GetNext(); // Could be NULL now
2048       if (currNode)
2049         currArrow = (wxArrowHead *)currNode->GetData();
2050     }
2051
2052     // Check if we're at the correct position in the
2053     // reference list
2054     if (targetName == refArrow->GetName())
2055     {
2056       if (currNode)
2057         m_arcArrows.Insert(currNode, arrow);
2058       else
2059         m_arcArrows.Append(arrow);
2060       return TRUE;
2061     }
2062     refNode = refNode->GetNext();
2063   }
2064   m_arcArrows.Append(arrow);
2065   return TRUE;
2066 }
2067
2068 void wxLineShape::ClearArrowsAtPosition(int end)
2069 {
2070   wxNode *node = m_arcArrows.GetFirst();
2071   while (node)
2072   {
2073     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2074     wxNode *next = node->GetNext();
2075     switch (end)
2076     {
2077       case -1:
2078       {
2079         delete arrow;
2080         delete node;
2081         break;
2082       }
2083       case ARROW_POSITION_START:
2084       {
2085         if (arrow->GetArrowEnd() == ARROW_POSITION_START)
2086         {
2087           delete arrow;
2088           delete node;
2089         }
2090         break;
2091       }
2092       case ARROW_POSITION_END:
2093       {
2094         if (arrow->GetArrowEnd() == ARROW_POSITION_END)
2095         {
2096           delete arrow;
2097           delete node;
2098         }
2099         break;
2100       }
2101       case ARROW_POSITION_MIDDLE:
2102       {
2103         if (arrow->GetArrowEnd() == ARROW_POSITION_MIDDLE)
2104         {
2105           delete arrow;
2106           delete node;
2107         }
2108         break;
2109       }
2110     }
2111     node = next;
2112   }
2113 }
2114
2115 bool wxLineShape::ClearArrow(const wxString& name)
2116 {
2117   wxNode *node = m_arcArrows.GetFirst();
2118   while (node)
2119   {
2120     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2121     if (arrow->GetName() == name)
2122     {
2123       delete arrow;
2124       delete node;
2125       return TRUE;
2126     }
2127     node = node->GetNext();
2128   }
2129   return FALSE;
2130 }
2131
2132 /*
2133  * Finds an arrowhead at the given position (if -1, any position)
2134  *
2135  */
2136
2137 wxArrowHead *wxLineShape::FindArrowHead(int position, const wxString& name)
2138 {
2139   wxNode *node = m_arcArrows.GetFirst();
2140   while (node)
2141   {
2142     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2143     if (((position == -1) || (position == arrow->GetArrowEnd())) &&
2144         (arrow->GetName() == name))
2145       return arrow;
2146     node = node->GetNext();
2147   }
2148   return NULL;
2149 }
2150
2151 wxArrowHead *wxLineShape::FindArrowHead(long arrowId)
2152 {
2153   wxNode *node = m_arcArrows.GetFirst();
2154   while (node)
2155   {
2156     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2157     if (arrowId == arrow->GetId())
2158       return arrow;
2159     node = node->GetNext();
2160   }
2161   return NULL;
2162 }
2163
2164 /*
2165  * Deletes an arrowhead at the given position (if -1, any position)
2166  *
2167  */
2168
2169 bool wxLineShape::DeleteArrowHead(int position, const wxString& name)
2170 {
2171   wxNode *node = m_arcArrows.GetFirst();
2172   while (node)
2173   {
2174     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2175     if (((position == -1) || (position == arrow->GetArrowEnd())) &&
2176         (arrow->GetName() == name))
2177     {
2178       delete arrow;
2179       delete node;
2180       return TRUE;
2181     }
2182     node = node->GetNext();
2183   }
2184   return FALSE;
2185 }
2186
2187 // Overloaded DeleteArrowHead: pass arrowhead id.
2188 bool wxLineShape::DeleteArrowHead(long id)
2189 {
2190   wxNode *node = m_arcArrows.GetFirst();
2191   while (node)
2192   {
2193     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2194     if (arrow->GetId() == id)
2195     {
2196       delete arrow;
2197       delete node;
2198       return TRUE;
2199     }
2200     node = node->GetNext();
2201   }
2202   return FALSE;
2203 }
2204
2205 /*
2206  * Calculate the minimum width a line
2207  * occupies, for the purposes of drawing lines in tools.
2208  *
2209  */
2210
2211 double wxLineShape::FindMinimumWidth()
2212 {
2213   double minWidth = 0.0;
2214   wxNode *node = m_arcArrows.GetFirst();
2215   while (node)
2216   {
2217     wxArrowHead *arrowHead = (wxArrowHead *)node->GetData();
2218     minWidth += arrowHead->GetSize();
2219     if (node->GetNext())
2220       minWidth += arrowHead->GetSpacing();
2221
2222     node = node->GetNext();
2223   }
2224   // We have ABSOLUTE minimum now. So
2225   // scale it to give it reasonable aesthetics
2226   // when drawing with line.
2227   if (minWidth > 0.0)
2228     minWidth = (double)(minWidth * 1.4);
2229   else
2230     minWidth = 20.0;
2231
2232   SetEnds(0.0, 0.0, minWidth, 0.0);
2233   Initialise();
2234
2235   return minWidth;
2236 }
2237
2238 // Find which position we're talking about at this (x, y).
2239 // Returns ARROW_POSITION_START, ARROW_POSITION_MIDDLE, ARROW_POSITION_END
2240 int wxLineShape::FindLinePosition(double x, double y)
2241 {
2242   double startX, startY, endX, endY;
2243   GetEnds(&startX, &startY, &endX, &endY);
2244
2245   // Find distances from centre, start and end. The smallest wins.
2246   double centreDistance = (double)(sqrt((x - m_xpos)*(x - m_xpos) + (y - m_ypos)*(y - m_ypos)));
2247   double startDistance = (double)(sqrt((x - startX)*(x - startX) + (y - startY)*(y - startY)));
2248   double endDistance = (double)(sqrt((x - endX)*(x - endX) + (y - endY)*(y - endY)));
2249
2250   if (centreDistance < startDistance && centreDistance < endDistance)
2251     return ARROW_POSITION_MIDDLE;
2252   else if (startDistance < endDistance)
2253     return ARROW_POSITION_START;
2254   else
2255     return ARROW_POSITION_END;
2256 }
2257
2258 // Set alignment flags
2259 void wxLineShape::SetAlignmentOrientation(bool isEnd, bool isHoriz)
2260 {
2261   if (isEnd)
2262   {
2263     if (isHoriz && ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) != LINE_ALIGNMENT_HORIZ))
2264       m_alignmentEnd |= LINE_ALIGNMENT_HORIZ;
2265     else if (!isHoriz && ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ))
2266       m_alignmentEnd -= LINE_ALIGNMENT_HORIZ;
2267   }
2268   else
2269   {
2270     if (isHoriz && ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) != LINE_ALIGNMENT_HORIZ))
2271       m_alignmentStart |= LINE_ALIGNMENT_HORIZ;
2272     else if (!isHoriz && ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ))
2273       m_alignmentStart -= LINE_ALIGNMENT_HORIZ;
2274   }
2275 }
2276
2277 void wxLineShape::SetAlignmentType(bool isEnd, int alignType)
2278 {
2279   if (isEnd)
2280   {
2281     if (alignType == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2282     {
2283       if ((m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE) != LINE_ALIGNMENT_TO_NEXT_HANDLE)
2284         m_alignmentEnd |= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2285     }
2286     else if ((m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE) == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2287       m_alignmentEnd -= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2288   }
2289   else
2290   {
2291     if (alignType == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2292     {
2293       if ((m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE) != LINE_ALIGNMENT_TO_NEXT_HANDLE)
2294         m_alignmentStart |= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2295     }
2296     else if ((m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE) == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2297       m_alignmentStart -= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2298   }
2299 }
2300
2301 bool wxLineShape::GetAlignmentOrientation(bool isEnd)
2302 {
2303   if (isEnd)
2304     return ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ);
2305   else
2306     return ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ);
2307 }
2308
2309 int wxLineShape::GetAlignmentType(bool isEnd)
2310 {
2311   if (isEnd)
2312     return (m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE);
2313   else
2314     return (m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE);
2315 }
2316
2317 wxRealPoint *wxLineShape::GetNextControlPoint(wxShape *nodeObject)
2318 {
2319   int n = m_lineControlPoints->GetCount();
2320   int nn;
2321   if (m_to == nodeObject)
2322   {
2323     // Must be END of line, so we want (n - 1)th control point.
2324     // But indexing ends at n-1, so subtract 2.
2325     nn = n - 2;
2326   }
2327   else nn = 1;
2328   wxNode *node = m_lineControlPoints->Item(nn);
2329   if (node)
2330   {
2331     return (wxRealPoint *)node->GetData();
2332   }
2333   else
2334     return FALSE;
2335 }
2336
2337 /*
2338  * Arrowhead
2339  *
2340  */
2341
2342 IMPLEMENT_DYNAMIC_CLASS(wxArrowHead, wxObject)
2343
2344 wxArrowHead::wxArrowHead(WXTYPE type, int end, double size, double dist, const wxString& name,
2345                      wxPseudoMetaFile *mf, long arrowId)
2346 {
2347   m_arrowType = type; m_arrowEnd = end; m_arrowSize = size;
2348   m_xOffset = dist;
2349   m_yOffset = 0.0;
2350   m_spacing = 5.0;
2351
2352   m_arrowName = name;
2353   m_metaFile = mf;
2354   m_id = arrowId;
2355   if (m_id == -1)
2356     m_id = wxNewId();
2357 }
2358
2359 wxArrowHead::wxArrowHead(wxArrowHead& toCopy)
2360 {
2361   m_arrowType = toCopy.m_arrowType; m_arrowEnd = toCopy.GetArrowEnd();
2362   m_arrowSize = toCopy.m_arrowSize;
2363   m_xOffset = toCopy.m_xOffset;
2364   m_yOffset = toCopy.m_yOffset;
2365   m_spacing = toCopy.m_spacing;
2366   m_arrowName = toCopy.m_arrowName ;
2367   if (toCopy.m_metaFile)
2368     m_metaFile = new wxPseudoMetaFile(*(toCopy.m_metaFile));
2369   else
2370     m_metaFile = NULL;
2371   m_id = wxNewId();
2372 }
2373
2374 wxArrowHead::~wxArrowHead()
2375 {
2376   if (m_metaFile) delete m_metaFile;
2377 }
2378
2379 void wxArrowHead::SetSize(double size)
2380 {
2381   m_arrowSize = size;
2382   if ((m_arrowType == ARROW_METAFILE) && m_metaFile)
2383   {
2384     double oldWidth = m_metaFile->m_width;
2385     if (oldWidth == 0.0)
2386       return;
2387
2388     double scale = (double)(size/oldWidth);
2389     if (scale != 1.0)
2390       m_metaFile->Scale(scale, scale);
2391   }
2392 }
2393
2394 // Can override this to create a different class of label shape
2395 wxLabelShape* wxLineShape::OnCreateLabelShape(wxLineShape *parent, wxShapeRegion *region, double w, double h)
2396 {
2397     return new wxLabelShape(parent, region, w, h);
2398 }
2399
2400 /*
2401  * Label object
2402  *
2403  */
2404
2405 IMPLEMENT_DYNAMIC_CLASS(wxLabelShape, wxRectangleShape)
2406
2407 wxLabelShape::wxLabelShape(wxLineShape *parent, wxShapeRegion *region, double w, double h):wxRectangleShape(w, h)
2408 {
2409   m_lineShape = parent;
2410   m_shapeRegion = region;
2411   SetPen(wxThePenList->FindOrCreatePen(wxColour(0, 0, 0), 1, wxDOT));
2412 }
2413
2414 wxLabelShape::~wxLabelShape()
2415 {
2416 }
2417
2418 void wxLabelShape::OnDraw(wxDC& dc)
2419 {
2420   if (m_lineShape && !m_lineShape->GetDrawHandles())
2421     return;
2422
2423     double x1 = (double)(m_xpos - m_width/2.0);
2424     double y1 = (double)(m_ypos - m_height/2.0);
2425
2426     if (m_pen)
2427     {
2428       if (m_pen->GetWidth() == 0)
2429         dc.SetPen(* g_oglTransparentPen);
2430       else
2431         dc.SetPen(* m_pen);
2432     }
2433     dc.SetBrush(* wxTRANSPARENT_BRUSH);
2434
2435     if (m_cornerRadius > 0.0)
2436       dc.DrawRoundedRectangle(WXROUND(x1), WXROUND(y1), WXROUND(m_width), WXROUND(m_height), m_cornerRadius);
2437     else
2438       dc.DrawRectangle(WXROUND(x1), WXROUND(y1), WXROUND(m_width), WXROUND(m_height));
2439 }
2440
2441 void wxLabelShape::OnDrawContents(wxDC& WXUNUSED(dc))
2442 {
2443 }
2444
2445 void wxLabelShape::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
2446 {
2447   wxRectangleShape::OnDragLeft(draw, x, y, keys, attachment);
2448 }
2449
2450 void wxLabelShape::OnBeginDragLeft(double x, double y, int keys, int attachment)
2451 {
2452   wxRectangleShape::OnBeginDragLeft(x, y, keys, attachment);
2453 }
2454
2455 void wxLabelShape::OnEndDragLeft(double x, double y, int keys, int attachment)
2456 {
2457   wxRectangleShape::OnEndDragLeft(x, y, keys, attachment);
2458 }
2459
2460 bool wxLabelShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
2461 {
2462     return m_lineShape->OnLabelMovePre(dc, this, x, y, old_x, old_y, display);
2463 }
2464
2465 bool wxLineShape::OnLabelMovePre(wxDC& dc, wxLabelShape* labelShape, double x, double y, double WXUNUSED(old_x), double WXUNUSED(old_y), bool WXUNUSED(display))
2466 {
2467   labelShape->m_shapeRegion->SetSize(labelShape->GetWidth(), labelShape->GetHeight());
2468
2469   // Find position in line's region list
2470   int i = 0;
2471   wxNode *node = GetRegions().GetFirst();
2472   while (node)
2473   {
2474     if (labelShape->m_shapeRegion == (wxShapeRegion *)node->GetData())
2475       node = NULL;
2476     else
2477     {
2478       node = node->GetNext();
2479       i ++;
2480     }
2481   }
2482   double xx, yy;
2483   GetLabelPosition(i, &xx, &yy);
2484   // Set the region's offset, relative to the default position for
2485   // each region.
2486   labelShape->m_shapeRegion->SetPosition((double)(x - xx), (double)(y - yy));
2487
2488   labelShape->SetX(x);
2489   labelShape->SetY(y);
2490
2491   // Need to reformat to fit region.
2492   if (labelShape->m_shapeRegion->GetText())
2493   {
2494
2495     wxString s(labelShape->m_shapeRegion->GetText());
2496     labelShape->FormatText(dc, s, i);
2497     DrawRegion(dc, labelShape->m_shapeRegion, xx, yy);
2498   }
2499   return TRUE;
2500 }
2501
2502 // Divert left and right clicks to line object
2503 void wxLabelShape::OnLeftClick(double x, double y, int keys, int attachment)
2504 {
2505   m_lineShape->GetEventHandler()->OnLeftClick(x, y, keys, attachment);
2506 }
2507
2508 void wxLabelShape::OnRightClick(double x, double y, int keys, int attachment)
2509 {
2510   m_lineShape->GetEventHandler()->OnRightClick(x, y, keys, attachment);
2511 }
2512