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   int i = 0;
 119   for (i = 0; i < n; i++)
 120   {
 121     wxRealPoint *point = new wxRealPoint(-999, -999);
 122     m_lineControlPoints->Append((wxObject*) point);
 123   }
 124 }
 125
 126 wxNode *wxLineShape::InsertLineControlPoint(wxDC* dc)
 127 {
 128     if (dc)
 129         Erase(*dc);
 130
 131   wxNode *last = m_lineControlPoints->GetLast();
 132   wxNode *second_last = last->GetPrevious();
 133   wxRealPoint *last_point = (wxRealPoint *)last->GetData();
 134   wxRealPoint *second_last_point = (wxRealPoint *)second_last->GetData();
 135
 136   // Choose a point half way between the last and penultimate points
 137   double line_x = ((last_point->x + second_last_point->x)/2);
 138   double line_y = ((last_point->y + second_last_point->y)/2);
 139
 140   wxRealPoint *point = new wxRealPoint(line_x, line_y);
 141   wxNode *node = m_lineControlPoints->Insert(last, (wxObject*) point);
 142   return node;
 143 }
 144
 145 bool wxLineShape::DeleteLineControlPoint()
 146 {
 147   if (m_lineControlPoints->GetCount() < 3)
 148     return FALSE;
 149
 150   wxNode *last = m_lineControlPoints->GetLast();
 151   wxNode *second_last = last->GetPrevious();
 152
 153   wxRealPoint *second_last_point = (wxRealPoint *)second_last->GetData();
 154   delete second_last_point;
 155   delete second_last;
 156
 157   return TRUE;
 158 }
 159
 160 void wxLineShape::Initialise()
 161 {
 162   if (m_lineControlPoints)
 163   {
 164     // Just move the first and last control points
 165     wxNode *first = m_lineControlPoints->GetFirst();
 166     wxRealPoint *first_point = (wxRealPoint *)first->GetData();
 167
 168     wxNode *last = m_lineControlPoints->GetLast();
 169     wxRealPoint *last_point = (wxRealPoint *)last->GetData();
 170
 171     // If any of the line points are at -999, we must
 172     // initialize them by placing them half way between the first
 173     // and the last.
 174     wxNode *node = first->GetNext();
 175     while (node)
 176     {
 177       wxRealPoint *point = (wxRealPoint *)node->GetData();
 178       if (point->x == -999)
 179       {
 180         double x1, y1, x2, y2;
 181         if (first_point->x < last_point->x)
 182           { x1 = first_point->x; x2 = last_point->x; }
 183         else
 184           { x2 = first_point->x; x1 = last_point->x; }
 185
 186         if (first_point->y < last_point->y)
 187           { y1 = first_point->y; y2 = last_point->y; }
 188         else
 189           { y2 = first_point->y; y1 = last_point->y; }
 190
 191         point->x = ((x2 - x1)/2 + x1);
 192         point->y = ((y2 - y1)/2 + y1);
 193       }
 194       node = node->GetNext();
 195     }
 196   }
 197 }
 198
 199 // Format a text string according to the region size, adding
 200 // strings with positions to region text list
 201 void wxLineShape::FormatText(wxDC& dc, const wxString& s, int i)
 202 {
 203   double w, h;
 204   ClearText(i);
 205
 206   if (m_regions.GetCount() < 1)
 207     return;
 208   wxNode *node = m_regions.Item(i);
 209   if (!node)
 210     return;
 211
 212   wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 213   region->SetText(s);
 214   dc.SetFont(* region->GetFont());
 215
 216   region->GetSize(&w, &h);
 217   // Initialize the size if zero
 218   if (((w == 0) || (h == 0)) && (s.Length() > 0))
 219   {
 220     w = 100; h = 50;
 221     region->SetSize(w, h);
 222   }
 223
 224   wxStringList *string_list = oglFormatText(dc, s, (w-5), (h-5), region->GetFormatMode());
 225   node = (wxNode*)string_list->GetFirst();
 226   while (node)
 227   {
 228     wxChar *s = (wxChar *)node->GetData();
 229     wxShapeTextLine *line = new wxShapeTextLine(0.0, 0.0, s);
 230     region->GetFormattedText().Append((wxObject *)line);
 231     node = node->GetNext();
 232   }
 233   delete string_list;
 234   double actualW = w;
 235   double actualH = h;
 236   if (region->GetFormatMode() & FORMAT_SIZE_TO_CONTENTS)
 237   {
 238     oglGetCentredTextExtent(dc, &(region->GetFormattedText()), m_xpos, m_ypos, w, h, &actualW, &actualH);
 239     if ((actualW != w ) || (actualH != h))
 240     {
 241       double xx, yy;
 242       GetLabelPosition(i, &xx, &yy);
 243       EraseRegion(dc, region, xx, yy);
 244       if (m_labelObjects[i])
 245       {
 246         m_labelObjects[i]->Select(FALSE, &dc);
 247         m_labelObjects[i]->Erase(dc);
 248         m_labelObjects[i]->SetSize(actualW, actualH);
 249       }
 250
 251       region->SetSize(actualW, actualH);
 252
 253       if (m_labelObjects[i])
 254       {
 255         m_labelObjects[i]->Select(TRUE, & dc);
 256         m_labelObjects[i]->Draw(dc);
 257       }
 258     }
 259   }
 260   oglCentreText(dc, &(region->GetFormattedText()), m_xpos, m_ypos, actualW, actualH, region->GetFormatMode());
 261   m_formatted = TRUE;
 262 }
 263
 264 void wxLineShape::DrawRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
 265 {
 266   if (GetDisableLabel())
 267     return;
 268
 269   double w, h;
 270   double xx, yy;
 271   region->GetSize(&w, &h);
 272
 273   // Get offset from x, y
 274   region->GetPosition(&xx, &yy);
 275
 276   double xp = xx + x;
 277   double yp = yy + y;
 278
 279   // First, clear a rectangle for the text IF there is any
 280   if (region->GetFormattedText().GetCount() > 0)
 281   {
 282       dc.SetPen(GetBackgroundPen());
 283       dc.SetBrush(GetBackgroundBrush());
 284
 285       // Now draw the text
 286       if (region->GetFont()) dc.SetFont(* region->GetFont());
 287
 288       dc.DrawRectangle((long)(xp - w/2.0), (long)(yp - h/2.0), (long)w, (long)h);
 289
 290       if (m_pen) dc.SetPen(* m_pen);
 291       dc.SetTextForeground(* region->GetActualColourObject());
 292
 293 #ifdef __WXMSW__
 294       dc.SetTextBackground(GetBackgroundBrush().GetColour());
 295 #endif
 296
 297       oglDrawFormattedText(dc, &(region->GetFormattedText()), xp, yp, w, h, region->GetFormatMode());
 298   }
 299 }
 300
 301 void wxLineShape::EraseRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
 302 {
 303   if (GetDisableLabel())
 304     return;
 305
 306   double w, h;
 307   double xx, yy;
 308   region->GetSize(&w, &h);
 309
 310   // Get offset from x, y
 311   region->GetPosition(&xx, &yy);
 312
 313   double xp = xx + x;
 314   double yp = yy + y;
 315
 316   if (region->GetFormattedText().GetCount() > 0)
 317   {
 318       dc.SetPen(GetBackgroundPen());
 319       dc.SetBrush(GetBackgroundBrush());
 320
 321       dc.DrawRectangle((long)(xp - w/2.0), (long)(yp - h/2.0), (long)w, (long)h);
 322   }
 323 }
 324
 325 // Get the reference point for a label. Region x and y
 326 // are offsets from this.
 327 // position is 0, 1, 2
 328 void wxLineShape::GetLabelPosition(int position, double *x, double *y)
 329 {
 330   switch (position)
 331   {
 332     case 0:
 333     {
 334       // Want to take the middle section for the label
 335       int n = m_lineControlPoints->GetCount();
 336       int half_way = (int)(n/2);
 337
 338       // Find middle of this line
 339       wxNode *node = m_lineControlPoints->Item(half_way - 1);
 340       wxRealPoint *point = (wxRealPoint *)node->GetData();
 341       wxNode *next_node = node->GetNext();
 342       wxRealPoint *next_point = (wxRealPoint *)next_node->GetData();
 343
 344       double dx = (next_point->x - point->x);
 345       double dy = (next_point->y - point->y);
 346       *x = (double)(point->x + dx/2.0);
 347       *y = (double)(point->y + dy/2.0);
 348       break;
 349     }
 350     case 1:
 351     {
 352       wxNode *node = m_lineControlPoints->GetFirst();
 353       *x = ((wxRealPoint *)node->GetData())->x;
 354       *y = ((wxRealPoint *)node->GetData())->y;
 355       break;
 356     }
 357     case 2:
 358     {
 359       wxNode *node = m_lineControlPoints->GetLast();
 360       *x = ((wxRealPoint *)node->GetData())->x;
 361       *y = ((wxRealPoint *)node->GetData())->y;
 362       break;
 363     }
 364     default:
 365       break;
 366   }
 367 }
 368
 369 /*
 370  * Find whether line is supposed to be vertical or horizontal and
 371  * make it so.
 372  *
 373  */
 374 void GraphicsStraightenLine(wxRealPoint *point1, wxRealPoint *point2)
 375 {
 376   double dx = point2->x - point1->x;
 377   double dy = point2->y - point1->y;
 378
 379   if (dx == 0.0)
 380     return;
 381   else if (fabs(dy/dx) > 1.0)
 382   {
 383     point2->x = point1->x;
 384   }
 385   else point2->y = point1->y;
 386 }
 387
 388 void wxLineShape::Straighten(wxDC *dc)
 389 {
 390   if (!m_lineControlPoints || m_lineControlPoints->GetCount() < 3)
 391     return;
 392
 393   if (dc)
 394     Erase(* dc);
 395
 396   wxNode *first_point_node = m_lineControlPoints->GetFirst();
 397   wxNode *last_point_node = m_lineControlPoints->GetLast();
 398   wxNode *second_last_point_node = last_point_node->GetPrevious();
 399
 400   wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
 401   wxRealPoint *second_last_point = (wxRealPoint *)second_last_point_node->GetData();
 402
 403   GraphicsStraightenLine(last_point, second_last_point);
 404
 405   wxNode *node = first_point_node;
 406   while (node && (node != second_last_point_node))
 407   {
 408     wxRealPoint *point = (wxRealPoint *)node->GetData();
 409     wxRealPoint *next_point = (wxRealPoint *)(node->GetNext()->GetData());
 410
 411     GraphicsStraightenLine(point, next_point);
 412     node = node->GetNext();
 413   }
 414
 415   if (dc)
 416     Draw(* dc);
 417 }
 418
 419
 420 void wxLineShape::Unlink()
 421 {
 422   if (m_to)
 423     m_to->GetLines().DeleteObject(this);
 424   if (m_from)
 425     m_from->GetLines().DeleteObject(this);
 426   m_to = NULL;
 427   m_from = NULL;
 428 }
 429
 430 void wxLineShape::SetEnds(double x1, double y1, double x2, double y2)
 431 {
 432   // Find centre point
 433   wxNode *first_point_node = m_lineControlPoints->GetFirst();
 434   wxNode *last_point_node = m_lineControlPoints->GetLast();
 435   wxRealPoint *first_point = (wxRealPoint *)first_point_node->GetData();
 436   wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
 437
 438   first_point->x = x1;
 439   first_point->y = y1;
 440   last_point->x = x2;
 441   last_point->y = y2;
 442
 443   m_xpos = (double)((x1 + x2)/2.0);
 444   m_ypos = (double)((y1 + y2)/2.0);
 445 }
 446
 447 // Get absolute positions of ends
 448 void wxLineShape::GetEnds(double *x1, double *y1, double *x2, double *y2)
 449 {
 450   wxNode *first_point_node = m_lineControlPoints->GetFirst();
 451   wxNode *last_point_node = m_lineControlPoints->GetLast();
 452   wxRealPoint *first_point = (wxRealPoint *)first_point_node->GetData();
 453   wxRealPoint *last_point = (wxRealPoint *)last_point_node->GetData();
 454
 455   *x1 = first_point->x; *y1 = first_point->y;
 456   *x2 = last_point->x; *y2 = last_point->y;
 457 }
 458
 459 void wxLineShape::SetAttachments(int from_attach, int to_attach)
 460 {
 461   m_attachmentFrom = from_attach;
 462   m_attachmentTo = to_attach;
 463 }
 464
 465 bool wxLineShape::HitTest(double x, double y, int *attachment, double *distance)
 466 {
 467   if (!m_lineControlPoints)
 468     return FALSE;
 469
 470   // Look at label regions in case mouse is over a label
 471   bool inLabelRegion = FALSE;
 472   for (int i = 0; i < 3; i ++)
 473   {
 474     wxNode *regionNode = m_regions.Item(i);
 475     if (regionNode)
 476     {
 477       wxShapeRegion *region = (wxShapeRegion *)regionNode->GetData();
 478       if (region->m_formattedText.GetCount() > 0)
 479       {
 480         double xp, yp, cx, cy, cw, ch;
 481         GetLabelPosition(i, &xp, &yp);
 482         // Offset region from default label position
 483         region->GetPosition(&cx, &cy);
 484         region->GetSize(&cw, &ch);
 485         cx += xp;
 486         cy += yp;
 487         double rLeft = (double)(cx - (cw/2.0));
 488         double rTop = (double)(cy - (ch/2.0));
 489         double rRight = (double)(cx + (cw/2.0));
 490         double rBottom = (double)(cy + (ch/2.0));
 491         if (x > rLeft && x < rRight && y > rTop && y < rBottom)
 492         {
 493           inLabelRegion = TRUE;
 494           i = 3;
 495         }
 496       }
 497     }
 498   }
 499
 500   wxNode *node = m_lineControlPoints->GetFirst();
 501
 502   while (node && node->GetNext())
 503   {
 504     wxRealPoint *point1 = (wxRealPoint *)node->GetData();
 505     wxRealPoint *point2 = (wxRealPoint *)node->GetNext()->GetData();
 506
 507     // For inaccurate mousing allow 8 pixel corridor
 508     int extra = 4;
 509
 510     double dx = point2->x - point1->x;
 511     double dy = point2->y - point1->y;
 512     double seg_len = sqrt(dx*dx+dy*dy);
 513     double distance_from_seg =
 514       seg_len*((x-point1->x)*dy-(y-point1->y)*dx)/(dy*dy+dx*dx);
 515     double distance_from_prev =
 516       seg_len*((y-point1->y)*dy+(x-point1->x)*dx)/(dy*dy+dx*dx);
 517
 518     if ((fabs(distance_from_seg) < extra &&
 519          distance_from_prev >= 0 && distance_from_prev <= seg_len)
 520         || inLabelRegion)
 521     {
 522       *attachment = 0;
 523       *distance = distance_from_seg;
 524       return TRUE;
 525     }
 526
 527     node = node->GetNext();
 528   }
 529   return FALSE;
 530 }
 531
 532 void wxLineShape::DrawArrows(wxDC& dc)
 533 {
 534   // Distance along line of each arrow: space them out evenly.
 535   double startArrowPos = 0.0;
 536   double endArrowPos = 0.0;
 537   double middleArrowPos = 0.0;
 538
 539   wxNode *node = m_arcArrows.GetFirst();
 540   while (node)
 541   {
 542     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
 543     switch (arrow->GetArrowEnd())
 544     {
 545       case ARROW_POSITION_START:
 546       {
 547         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 548           // If specified, x offset is proportional to line length
 549           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 550         else
 551         {
 552           DrawArrow(dc, arrow, startArrowPos, FALSE);      // Absolute distance
 553           startArrowPos += arrow->GetSize() + arrow->GetSpacing();
 554         }
 555         break;
 556       }
 557       case ARROW_POSITION_END:
 558       {
 559         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 560           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 561         else
 562         {
 563           DrawArrow(dc, arrow, endArrowPos, FALSE);
 564           endArrowPos += arrow->GetSize() + arrow->GetSpacing();
 565         }
 566         break;
 567       }
 568       case ARROW_POSITION_MIDDLE:
 569       {
 570         arrow->SetXOffset(middleArrowPos);
 571         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 572           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 573         else
 574         {
 575           DrawArrow(dc, arrow, middleArrowPos, FALSE);
 576           middleArrowPos += arrow->GetSize() + arrow->GetSpacing();
 577         }
 578         break;
 579       }
 580     }
 581     node = node->GetNext();
 582   }
 583 }
 584
 585 void wxLineShape::DrawArrow(wxDC& dc, wxArrowHead *arrow, double xOffset, bool proportionalOffset)
 586 {
 587   wxNode *first_line_node = m_lineControlPoints->GetFirst();
 588   wxRealPoint *first_line_point = (wxRealPoint *)first_line_node->GetData();
 589   wxNode *second_line_node = first_line_node->GetNext();
 590   wxRealPoint *second_line_point = (wxRealPoint *)second_line_node->GetData();
 591
 592   wxNode *last_line_node = m_lineControlPoints->GetLast();
 593   wxRealPoint *last_line_point = (wxRealPoint *)last_line_node->GetData();
 594   wxNode *second_last_line_node = last_line_node->GetPrevious();
 595   wxRealPoint *second_last_line_point = (wxRealPoint *)second_last_line_node->GetData();
 596
 597   // Position where we want to start drawing
 598   double positionOnLineX, positionOnLineY;
 599
 600   // Position of start point of line, at the end of which we draw the arrow.
 601   double startPositionX, startPositionY;
 602
 603   switch (arrow->GetPosition())
 604   {
 605     case ARROW_POSITION_START:
 606     {
 607       // If we're using a proportional offset, calculate just where this will
 608       // be on the line.
 609       double realOffset = xOffset;
 610       if (proportionalOffset)
 611       {
 612         double totalLength =
 613           (double)sqrt((second_line_point->x - first_line_point->x)*(second_line_point->x - first_line_point->x) +
 614                       (second_line_point->y - first_line_point->y)*(second_line_point->y - first_line_point->y));
 615         realOffset = (double)(xOffset * totalLength);
 616       }
 617       GetPointOnLine(second_line_point->x, second_line_point->y,
 618                      first_line_point->x, first_line_point->y,
 619                      realOffset, &positionOnLineX, &positionOnLineY);
 620       startPositionX = second_line_point->x;
 621       startPositionY = second_line_point->y;
 622       break;
 623     }
 624     case ARROW_POSITION_END:
 625     {
 626       // If we're using a proportional offset, calculate just where this will
 627       // be on the line.
 628       double realOffset = xOffset;
 629       if (proportionalOffset)
 630       {
 631         double totalLength =
 632           (double)sqrt((second_last_line_point->x - last_line_point->x)*(second_last_line_point->x - last_line_point->x) +
 633                       (second_last_line_point->y - last_line_point->y)*(second_last_line_point->y - last_line_point->y));
 634         realOffset = (double)(xOffset * totalLength);
 635       }
 636       GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
 637                      last_line_point->x, last_line_point->y,
 638                      realOffset, &positionOnLineX, &positionOnLineY);
 639       startPositionX = second_last_line_point->x;
 640       startPositionY = second_last_line_point->y;
 641       break;
 642     }
 643     case ARROW_POSITION_MIDDLE:
 644     {
 645       // Choose a point half way between the last and penultimate points
 646       double x = ((last_line_point->x + second_last_line_point->x)/2);
 647       double y = ((last_line_point->y + second_last_line_point->y)/2);
 648
 649       // If we're using a proportional offset, calculate just where this will
 650       // be on the line.
 651       double realOffset = xOffset;
 652       if (proportionalOffset)
 653       {
 654         double totalLength =
 655           (double)sqrt((second_last_line_point->x - x)*(second_last_line_point->x - x) +
 656                       (second_last_line_point->y - y)*(second_last_line_point->y - y));
 657         realOffset = (double)(xOffset * totalLength);
 658       }
 659
 660       GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
 661                      x, y, realOffset, &positionOnLineX, &positionOnLineY);
 662       startPositionX = second_last_line_point->x;
 663       startPositionY = second_last_line_point->y;
 664       break;
 665     }
 666   }
 667
 668   /*
 669    * Add yOffset to arrow, if any
 670    */
 671
 672   const double myPi = (double) 3.14159265;
 673   // The translation that the y offset may give
 674   double deltaX = 0.0;
 675   double deltaY = 0.0;
 676   if ((arrow->GetYOffset() != 0.0) && !m_ignoreArrowOffsets)
 677   {
 678     /*
 679                                  |(x4, y4)
 680                                  |d
 681                                  |
 682        (x1, y1)--------------(x3, y3)------------------(x2, y2)
 683        x4 = x3 - d * sin(theta)
 684        y4 = y3 + d * cos(theta)
 685
 686        Where theta = tan(-1) of (y3-y1)/(x3-x1)
 687      */
 688      double x1 = startPositionX;
 689      double y1 = startPositionY;
 690      double x3 = positionOnLineX;
 691      double y3 = positionOnLineY;
 692      double d = -arrow->GetYOffset(); // Negate so +offset is above line
 693
 694      double theta = 0.0;
 695      if (x3 == x1)
 696        theta = (double)(myPi/2.0);
 697      else
 698        theta = (double)atan((y3-y1)/(x3-x1));
 699
 700      double x4 = (double)(x3 - (d*sin(theta)));
 701      double y4 = (double)(y3 + (d*cos(theta)));
 702
 703      deltaX = x4 - positionOnLineX;
 704      deltaY = y4 - positionOnLineY;
 705   }
 706
 707   switch (arrow->_GetType())
 708   {
 709     case ARROW_ARROW:
 710     {
 711       double arrowLength = arrow->GetSize();
 712       double arrowWidth = (double)(arrowLength/3.0);
 713
 714       double tip_x, tip_y, side1_x, side1_y, side2_x, side2_y;
 715       oglGetArrowPoints(startPositionX+deltaX, startPositionY+deltaY,
 716                        positionOnLineX+deltaX, positionOnLineY+deltaY,
 717                        arrowLength, arrowWidth, &tip_x, &tip_y,
 718                        &side1_x, &side1_y, &side2_x, &side2_y);
 719
 720       wxPoint points[4];
 721       points[0].x = (int) tip_x; points[0].y = (int) tip_y;
 722       points[1].x = (int) side1_x; points[1].y = (int) side1_y;
 723       points[2].x = (int) side2_x; points[2].y = (int) side2_y;
 724       points[3].x = (int) tip_x; points[3].y = (int) tip_y;
 725
 726       dc.SetPen(* m_pen);
 727       dc.SetBrush(* m_brush);
 728       dc.DrawPolygon(4, points);
 729       break;
 730     }
 731     case ARROW_HOLLOW_CIRCLE:
 732     case ARROW_FILLED_CIRCLE:
 733     {
 734       // Find point on line of centre of circle, which is a radius away
 735       // from the end position
 736       double diameter = (double)(arrow->GetSize());
 737       double x, y;
 738       GetPointOnLine(startPositionX+deltaX, startPositionY+deltaY,
 739                    positionOnLineX+deltaX, positionOnLineY+deltaY,
 740                    (double)(diameter/2.0),
 741                    &x, &y);
 742
 743       // Convert ellipse centre to top-left coordinates
 744       double x1 = (double)(x - (diameter/2.0));
 745       double y1 = (double)(y - (diameter/2.0));
 746
 747       dc.SetPen(* m_pen);
 748       if (arrow->_GetType() == ARROW_HOLLOW_CIRCLE)
 749         dc.SetBrush(* g_oglWhiteBackgroundBrush);
 750       else
 751         dc.SetBrush(* m_brush);
 752
 753       dc.DrawEllipse((long) x1, (long) y1, (long) diameter, (long) diameter);
 754       break;
 755     }
 756     case ARROW_SINGLE_OBLIQUE:
 757     {
 758       break;
 759     }
 760     case ARROW_METAFILE:
 761     {
 762       if (arrow->GetMetaFile())
 763       {
 764         // Find point on line of centre of object, which is a half-width away
 765         // from the end position
 766         /*
 767          *                width
 768          * <-- start pos  <-----><-- positionOnLineX
 769          *                _____
 770          * --------------|  x  | <-- e.g. rectangular arrowhead
 771          *                -----
 772          */
 773         double x, y;
 774         GetPointOnLine(startPositionX, startPositionY,
 775                    positionOnLineX, positionOnLineY,
 776                    (double)(arrow->GetMetaFile()->m_width/2.0),
 777                    &x, &y);
 778
 779         // Calculate theta for rotating the metafile.
 780         /*
 781           |
 782           |     o(x2, y2)   'o' represents the arrowhead.
 783           |    /
 784           |   /
 785           |  /theta
 786           | /(x1, y1)
 787           |______________________
 788         */
 789         double theta = 0.0;
 790         double x1 = startPositionX;
 791         double y1 = startPositionY;
 792         double x2 = positionOnLineX;
 793         double y2 = positionOnLineY;
 794
 795         if ((x1 == x2) && (y1 == y2))
 796           theta = 0.0;
 797
 798         else if ((x1 == x2) && (y1 > y2))
 799           theta = (double)(3.0*myPi/2.0);
 800
 801         else if ((x1 == x2) && (y2 > y1))
 802           theta = (double)(myPi/2.0);
 803
 804         else if ((x2 > x1) && (y2 >= y1))
 805           theta = (double)atan((y2 - y1)/(x2 - x1));
 806
 807         else if (x2 < x1)
 808           theta = (double)(myPi + atan((y2 - y1)/(x2 - x1)));
 809
 810         else if ((x2 > x1) && (y2 < y1))
 811           theta = (double)(2*myPi + atan((y2 - y1)/(x2 - x1)));
 812
 813         else
 814         {
 815           wxLogFatalError(wxT("Unknown arrowhead rotation case in lines.cc"));
 816         }
 817
 818         // Rotate about the centre of the object, then place
 819         // the object on the line.
 820         if (arrow->GetMetaFile()->GetRotateable())
 821           arrow->GetMetaFile()->Rotate(0.0, 0.0, theta);
 822
 823         if (m_erasing)
 824         {
 825           // If erasing, just draw a rectangle.
 826           double minX, minY, maxX, maxY;
 827           arrow->GetMetaFile()->GetBounds(&minX, &minY, &maxX, &maxY);
 828           // Make erasing rectangle slightly bigger or you get droppings.
 829           int extraPixels = 4;
 830           dc.DrawRectangle((long)(deltaX + x + minX - (extraPixels/2.0)), (long)(deltaY + y + minY - (extraPixels/2.0)),
 831                            (long)(maxX - minX + extraPixels), (long)(maxY - minY + extraPixels));
 832         }
 833         else
 834           arrow->GetMetaFile()->Draw(dc, x+deltaX, y+deltaY);
 835       }
 836       break;
 837     }
 838     default:
 839     {
 840     }
 841   }
 842 }
 843
 844 void wxLineShape::OnErase(wxDC& dc)
 845 {
 846     wxPen *old_pen = m_pen;
 847     wxBrush *old_brush = m_brush;
 848     wxPen bg_pen = GetBackgroundPen();
 849     wxBrush bg_brush = GetBackgroundBrush();
 850     SetPen(&bg_pen);
 851     SetBrush(&bg_brush);
 852
 853     double bound_x, bound_y;
 854     GetBoundingBoxMax(&bound_x, &bound_y);
 855     if (m_font) dc.SetFont(* m_font);
 856
 857     // Undraw text regions
 858     for (int i = 0; i < 3; i++)
 859     {
 860       wxNode *node = m_regions.Item(i);
 861       if (node)
 862       {
 863         double x, y;
 864         wxShapeRegion *region = (wxShapeRegion *)node->GetData();
 865         GetLabelPosition(i, &x, &y);
 866         EraseRegion(dc, region, x, y);
 867       }
 868     }
 869
 870     // Undraw line
 871     dc.SetPen(GetBackgroundPen());
 872     dc.SetBrush(GetBackgroundBrush());
 873
 874     // Drawing over the line only seems to work if the line has a thickness
 875     // of 1.
 876     if (old_pen && (old_pen->GetWidth() > 1))
 877     {
 878       dc.DrawRectangle((long)(m_xpos - (bound_x/2.0) - 2.0), (long)(m_ypos - (bound_y/2.0) - 2.0),
 879                         (long)(bound_x+4.0),  (long)(bound_y+4.0));
 880     }
 881     else
 882     {
 883       m_erasing = TRUE;
 884       GetEventHandler()->OnDraw(dc);
 885       GetEventHandler()->OnEraseControlPoints(dc);
 886       m_erasing = FALSE;
 887     }
 888
 889     if (old_pen) SetPen(old_pen);
 890     if (old_brush) SetBrush(old_brush);
 891 }
 892
 893 void wxLineShape::GetBoundingBoxMin(double *w, double *h)
 894 {
 895   double x1 = 10000;
 896   double y1 = 10000;
 897   double x2 = -10000;
 898   double y2 = -10000;
 899
 900   wxNode *node = m_lineControlPoints->GetFirst();
 901   while (node)
 902   {
 903     wxRealPoint *point = (wxRealPoint *)node->GetData();
 904
 905     if (point->x < x1) x1 = point->x;
 906     if (point->y < y1) y1 = point->y;
 907     if (point->x > x2) x2 = point->x;
 908     if (point->y > y2) y2 = point->y;
 909
 910     node = node->GetNext();
 911   }
 912   *w = (double)(x2 - x1);
 913   *h = (double)(y2 - y1);
 914 }
 915
 916 /*
 917  * For a node image of interest, finds the position of this arc
 918  * amongst all the arcs which are attached to THIS SIDE of the node image,
 919  * and the number of same.
 920  */
 921 void wxLineShape::FindNth(wxShape *image, int *nth, int *no_arcs, bool incoming)
 922 {
 923   int n = -1;
 924   int num = 0;
 925   wxNode *node = image->GetLines().GetFirst();
 926   int this_attachment;
 927   if (image == m_to)
 928     this_attachment = m_attachmentTo;
 929   else
 930     this_attachment = m_attachmentFrom;
 931
 932   // Find number of lines going into/out of this particular attachment point
 933   while (node)
 934   {
 935     wxLineShape *line = (wxLineShape *)node->GetData();
 936
 937     if (line->m_from == image)
 938     {
 939       // This is the nth line attached to 'image'
 940       if ((line == this) && !incoming)
 941         n = num;
 942
 943       // Increment num count if this is the same side (attachment number)
 944       if (line->m_attachmentFrom == this_attachment)
 945         num ++;
 946     }
 947
 948     if (line->m_to == image)
 949     {
 950       // This is the nth line attached to 'image'
 951       if ((line == this) && incoming)
 952         n = num;
 953
 954       // Increment num count if this is the same side (attachment number)
 955       if (line->m_attachmentTo == this_attachment)
 956         num ++;
 957     }
 958
 959     node = node->GetNext();
 960   }
 961   *nth = n;
 962   *no_arcs = num;
 963 }
 964
 965 void wxLineShape::OnDrawOutline(wxDC& dc, double x, double y, double w, double h)
 966 {
 967   wxPen *old_pen = m_pen;
 968   wxBrush *old_brush = m_brush;
 969
 970   wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 971   SetPen(& dottedPen);
 972   SetBrush( wxTRANSPARENT_BRUSH );
 973
 974   GetEventHandler()->OnDraw(dc);
 975
 976   if (old_pen) SetPen(old_pen);
 977   else SetPen(NULL);
 978   if (old_brush) SetBrush(old_brush);
 979   else SetBrush(NULL);
 980 }
 981
 982 bool wxLineShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
 983 {
 984   double x_offset = x - old_x;
 985   double y_offset = y - old_y;
 986
 987   if (m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
 988   {
 989     wxNode *node = m_lineControlPoints->GetFirst();
 990     while (node)
 991     {
 992       wxRealPoint *point = (wxRealPoint *)node->GetData();
 993       point->x += x_offset;
 994       point->y += y_offset;
 995       node = node->GetNext();
 996     }
 997
 998   }
 999
1000   // Move temporary label rectangles if necessary
1001   for (int i = 0; i < 3; i++)
1002   {
1003     if (m_labelObjects[i])
1004     {
1005       m_labelObjects[i]->Erase(dc);
1006       double xp, yp, xr, yr;
1007       GetLabelPosition(i, &xp, &yp);
1008       wxNode *node = m_regions.Item(i);
1009       if (node)
1010       {
1011         wxShapeRegion *region = (wxShapeRegion *)node->GetData();
1012         region->GetPosition(&xr, &yr);
1013       }
1014       else
1015       {
1016         xr = 0.0; yr = 0.0;
1017       }
1018
1019       m_labelObjects[i]->Move(dc, xp+xr, yp+yr);
1020     }
1021   }
1022   return TRUE;
1023 }
1024
1025 void wxLineShape::OnMoveLink(wxDC& dc, bool moveControlPoints)
1026 {
1027   if (!m_from || !m_to)
1028    return;
1029
1030     if (m_lineControlPoints->GetCount() > 2)
1031       Initialise();
1032
1033     // Do each end - nothing in the middle. User has to move other points
1034     // manually if necessary.
1035     double end_x, end_y;
1036     double other_end_x, other_end_y;
1037
1038     FindLineEndPoints(&end_x, &end_y, &other_end_x, &other_end_y);
1039
1040     wxNode *first = m_lineControlPoints->GetFirst();
1041     wxRealPoint *first_point = (wxRealPoint *)first->GetData();
1042     wxNode *last = m_lineControlPoints->GetLast();
1043     wxRealPoint *last_point = (wxRealPoint *)last->GetData();
1044
1045 /* This is redundant, surely? Done by SetEnds.
1046     first_point->x = end_x; first_point->y = end_y;
1047     last_point->x = other_end_x; last_point->y = other_end_y;
1048 */
1049
1050     double oldX = m_xpos;
1051     double oldY = m_ypos;
1052
1053     SetEnds(end_x, end_y, other_end_x, other_end_y);
1054
1055     // Do a second time, because one may depend on the other.
1056     FindLineEndPoints(&end_x, &end_y, &other_end_x, &other_end_y);
1057     SetEnds(end_x, end_y, other_end_x, other_end_y);
1058
1059     // Try to move control points with the arc
1060     double x_offset = m_xpos - oldX;
1061     double y_offset = m_ypos - oldY;
1062
1063 //    if (moveControlPoints && m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
1064     // Only move control points if it's a self link. And only works if attachment mode is ON.
1065     if ((m_from == m_to) && (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE) && moveControlPoints && m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
1066     {
1067       wxNode *node = m_lineControlPoints->GetFirst();
1068       while (node)
1069       {
1070         if ((node != m_lineControlPoints->GetFirst()) && (node != m_lineControlPoints->GetLast()))
1071         {
1072           wxRealPoint *point = (wxRealPoint *)node->GetData();
1073           point->x += x_offset;
1074           point->y += y_offset;
1075         }
1076         node = node->GetNext();
1077       }
1078     }
1079
1080     Move(dc, m_xpos, m_ypos);
1081 }
1082
1083 // Finds the x, y points at the two ends of the line.
1084 // This function can be used by e.g. line-routing routines to
1085 // get the actual points on the two node images where the lines will be drawn
1086 // to/from.
1087 void wxLineShape::FindLineEndPoints(double *fromX, double *fromY, double *toX, double *toY)
1088 {
1089   if (!m_from || !m_to)
1090    return;
1091
1092   // Do each end - nothing in the middle. User has to move other points
1093   // manually if necessary.
1094   double end_x, end_y;
1095   double other_end_x, other_end_y;
1096
1097   wxNode *first = m_lineControlPoints->GetFirst();
1098   wxRealPoint *first_point = (wxRealPoint *)first->GetData();
1099   wxNode *last = m_lineControlPoints->GetLast();
1100   wxRealPoint *last_point = (wxRealPoint *)last->GetData();
1101
1102   wxNode *second = first->GetNext();
1103   wxRealPoint *second_point = (wxRealPoint *)second->GetData();
1104
1105   wxNode *second_last = last->GetPrevious();
1106   wxRealPoint *second_last_point = (wxRealPoint *)second_last->GetData();
1107
1108   if (m_lineControlPoints->GetCount() > 2)
1109   {
1110     if (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1111     {
1112       int nth, no_arcs;
1113       FindNth(m_from, &nth, &no_arcs, FALSE); // Not incoming
1114       m_from->GetAttachmentPosition(m_attachmentFrom, &end_x, &end_y, nth, no_arcs, this);
1115     }
1116     else
1117       (void) m_from->GetPerimeterPoint(m_from->GetX(), m_from->GetY(),
1118                                    (double)second_point->x, (double)second_point->y,
1119                                     &end_x, &end_y);
1120
1121     if (m_to->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1122     {
1123       int nth, no_arcs;
1124       FindNth(m_to, &nth, &no_arcs, TRUE); // Incoming
1125       m_to->GetAttachmentPosition(m_attachmentTo, &other_end_x, &other_end_y, nth, no_arcs, this);
1126     }
1127     else
1128       (void) m_to->GetPerimeterPoint(m_to->GetX(), m_to->GetY(),
1129                                 (double)second_last_point->x, (double)second_last_point->y,
1130                                 &other_end_x, &other_end_y);
1131   }
1132   else
1133   {
1134     double fromX = m_from->GetX();
1135     double fromY = m_from->GetY();
1136     double toX = m_to->GetX();
1137     double toY = m_to->GetY();
1138
1139     if (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1140     {
1141       int nth, no_arcs;
1142       FindNth(m_from, &nth, &no_arcs, FALSE);
1143       m_from->GetAttachmentPosition(m_attachmentFrom, &end_x, &end_y, nth, no_arcs, this);
1144       fromX = end_x;
1145       fromY = end_y;
1146     }
1147
1148     if (m_to->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1149     {
1150       int nth, no_arcs;
1151       FindNth(m_to, &nth, &no_arcs, TRUE);
1152       m_to->GetAttachmentPosition(m_attachmentTo, &other_end_x, &other_end_y, nth, no_arcs, this);
1153       toX = other_end_x;
1154       toY = other_end_y;
1155     }
1156
1157     if (m_from->GetAttachmentMode() == ATTACHMENT_MODE_NONE)
1158       (void) m_from->GetPerimeterPoint(m_from->GetX(), m_from->GetY(),
1159                                   toX, toY,
1160                                   &end_x, &end_y);
1161
1162     if (m_to->GetAttachmentMode() == ATTACHMENT_MODE_NONE)
1163       (void) m_to->GetPerimeterPoint(m_to->GetX(), m_to->GetY(),
1164                                 fromX, fromY,
1165                                 &other_end_x, &other_end_y);
1166   }
1167   *fromX = end_x;
1168   *fromY = end_y;
1169   *toX = other_end_x;
1170   *toY = other_end_y;
1171 }
1172
1173 void wxLineShape::OnDraw(wxDC& dc)
1174 {
1175   if (m_lineControlPoints)
1176   {
1177     if (m_pen)
1178       dc.SetPen(* m_pen);
1179     if (m_brush)
1180       dc.SetBrush(* m_brush);
1181
1182     int n = m_lineControlPoints->GetCount();
1183     wxPoint *points = new wxPoint[n];
1184     int i;
1185     for (i = 0; i < n; i++)
1186     {
1187         wxRealPoint* point = (wxRealPoint*) m_lineControlPoints->Item(i)->GetData();
1188         points[i].x = WXROUND(point->x);
1189         points[i].y = WXROUND(point->y);
1190     }
1191
1192     if (m_isSpline)
1193       dc.DrawSpline(n, points);
1194     else
1195       dc.DrawLines(n, points);
1196
1197 #ifdef __WXMSW__
1198     // For some reason, last point isn't drawn under Windows.
1199     dc.DrawPoint(points[n-1]);
1200 #endif
1201
1202     delete[] points;
1203
1204
1205     // Problem with pen - if not a solid pen, does strange things
1206     // to the arrowhead. So make (get) a new pen that's solid.
1207     if (m_pen && (m_pen->GetStyle() != wxSOLID))
1208     {
1209       wxPen *solid_pen =
1210         wxThePenList->FindOrCreatePen(m_pen->GetColour(), 1, wxSOLID);
1211       if (solid_pen)
1212         dc.SetPen(* solid_pen);
1213     }
1214     DrawArrows(dc);
1215   }
1216 }
1217
1218 void wxLineShape::OnDrawControlPoints(wxDC& dc)
1219 {
1220   if (!m_drawHandles)
1221     return;
1222
1223   // Draw temporary label rectangles if necessary
1224   for (int i = 0; i < 3; i++)
1225   {
1226     if (m_labelObjects[i])
1227       m_labelObjects[i]->Draw(dc);
1228   }
1229   wxShape::OnDrawControlPoints(dc);
1230 }
1231
1232 void wxLineShape::OnEraseControlPoints(wxDC& dc)
1233 {
1234   // Erase temporary label rectangles if necessary
1235   for (int i = 0; i < 3; i++)
1236   {
1237     if (m_labelObjects[i])
1238       m_labelObjects[i]->Erase(dc);
1239   }
1240   wxShape::OnEraseControlPoints(dc);
1241 }
1242
1243 void wxLineShape::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
1244 {
1245 }
1246
1247 void wxLineShape::OnBeginDragLeft(double x, double y, int keys, int attachment)
1248 {
1249 }
1250
1251 void wxLineShape::OnEndDragLeft(double x, double y, int keys, int attachment)
1252 {
1253 }
1254
1255 /*
1256 void wxLineShape::SetArrowSize(double length, double width)
1257 {
1258   arrow_length = length;
1259   arrow_width = width;
1260 }
1261
1262 void wxLineShape::SetStartArrow(int style)
1263 {
1264   start_style = style;
1265 }
1266
1267 void wxLineShape::SetMiddleArrow(int style)
1268 {
1269   middle_style = style;
1270 }
1271
1272 void wxLineShape::SetEndArrow(int style)
1273 {
1274   end_style = style;
1275 }
1276 */
1277
1278 void wxLineShape::OnDrawContents(wxDC& dc)
1279 {
1280   if (GetDisableLabel())
1281     return;
1282
1283   for (int i = 0; i < 3; i++)
1284   {
1285     wxNode *node = m_regions.Item(i);
1286     if (node)
1287     {
1288       wxShapeRegion *region = (wxShapeRegion *)node->GetData();
1289       double x, y;
1290       GetLabelPosition(i, &x, &y);
1291       DrawRegion(dc, region, x, y);
1292     }
1293   }
1294 }
1295
1296 void wxLineShape::SetTo(wxShape *object)
1297 {
1298   m_to = object;
1299 }
1300
1301 void wxLineShape::SetFrom(wxShape *object)
1302 {
1303   m_from = object;
1304 }
1305
1306 void wxLineShape::MakeControlPoints()
1307 {
1308   if (m_canvas && m_lineControlPoints)
1309   {
1310     wxNode *first = m_lineControlPoints->GetFirst();
1311     wxNode *last = m_lineControlPoints->GetLast();
1312     wxRealPoint *first_point = (wxRealPoint *)first->GetData();
1313     wxRealPoint *last_point = (wxRealPoint *)last->GetData();
1314
1315     wxLineControlPoint *control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1316                                                first_point->x, first_point->y,
1317                                                CONTROL_POINT_ENDPOINT_FROM);
1318     control->m_point = first_point;
1319     m_canvas->AddShape(control);
1320     m_controlPoints.Append(control);
1321
1322
1323     wxNode *node = first->GetNext();
1324     while (node != last)
1325     {
1326       wxRealPoint *point = (wxRealPoint *)node->GetData();
1327
1328       control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1329                                                point->x, point->y,
1330                                                CONTROL_POINT_LINE);
1331       control->m_point = point;
1332
1333       m_canvas->AddShape(control);
1334       m_controlPoints.Append(control);
1335
1336       node = node->GetNext();
1337     }
1338     control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1339                                                last_point->x, last_point->y,
1340                                                CONTROL_POINT_ENDPOINT_TO);
1341     control->m_point = last_point;
1342     m_canvas->AddShape(control);
1343     m_controlPoints.Append(control);
1344
1345   }
1346
1347 }
1348
1349 void wxLineShape::ResetControlPoints()
1350 {
1351   if (m_canvas && m_lineControlPoints && m_controlPoints.GetCount() > 0)
1352   {
1353     wxNode *node = m_controlPoints.GetFirst();
1354     wxNode *control_node = m_lineControlPoints->GetFirst();
1355     while (node && control_node)
1356     {
1357       wxRealPoint *point = (wxRealPoint *)control_node->GetData();
1358       wxLineControlPoint *control = (wxLineControlPoint *)node->GetData();
1359       control->SetX(point->x);
1360       control->SetY(point->y);
1361
1362       node = node->GetNext();
1363       control_node = control_node->GetNext();
1364     }
1365   }
1366 }
1367
1368 #if wxUSE_PROLOGIO
1369 void wxLineShape::WriteAttributes(wxExpr *clause)
1370 {
1371   wxShape::WriteAttributes(clause);
1372
1373   if (m_from)
1374     clause->AddAttributeValue("from", m_from->GetId());
1375   if (m_to)
1376     clause->AddAttributeValue("to", m_to->GetId());
1377
1378   if (m_attachmentTo != 0)
1379     clause->AddAttributeValue("attachment_to", (long)m_attachmentTo);
1380   if (m_attachmentFrom != 0)
1381     clause->AddAttributeValue("attachment_from", (long)m_attachmentFrom);
1382
1383   if (m_alignmentStart != 0)
1384     clause->AddAttributeValue("align_start", (long)m_alignmentStart);
1385   if (m_alignmentEnd != 0)
1386     clause->AddAttributeValue("align_end", (long)m_alignmentEnd);
1387
1388   clause->AddAttributeValue("is_spline", (long)m_isSpline);
1389   if (m_maintainStraightLines)
1390     clause->AddAttributeValue("keep_lines_straight", (long)m_maintainStraightLines);
1391
1392   // Make a list of lists for the (sp)line controls
1393   wxExpr *list = new wxExpr(wxExprList);
1394   wxNode *node = m_lineControlPoints->GetFirst();
1395   while (node)
1396   {
1397     wxRealPoint *point = (wxRealPoint *)node->GetData();
1398     wxExpr *point_list = new wxExpr(wxExprList);
1399     wxExpr *x_expr = new wxExpr((double) point->x);
1400     wxExpr *y_expr = new wxExpr((double) point->y);
1401     point_list->Append(x_expr);
1402     point_list->Append(y_expr);
1403     list->Append(point_list);
1404
1405     node = node->GetNext();
1406   }
1407   clause->AddAttributeValue("controls", list);
1408
1409   // Write arc arrows in new OGL format, if there are any.
1410   // This is a list of lists. Each sublist comprises:
1411   // (arrowType arrowEnd xOffset arrowSize)
1412   if (m_arcArrows.GetCount() > 0)
1413   {
1414     wxExpr *arrow_list = new wxExpr(wxExprList);
1415     node = m_arcArrows.GetFirst();
1416     while (node)
1417     {
1418       wxArrowHead *head = (wxArrowHead *)node->GetData();
1419       wxExpr *head_list = new wxExpr(wxExprList);
1420       head_list->Append(new wxExpr((long)head->_GetType()));
1421       head_list->Append(new wxExpr((long)head->GetArrowEnd()));
1422       head_list->Append(new wxExpr(head->GetXOffset()));
1423       head_list->Append(new wxExpr(head->GetArrowSize()));
1424       head_list->Append(new wxExpr(wxExprString, head->GetName()));
1425       head_list->Append(new wxExpr(head->GetId()));
1426
1427       // New members of wxArrowHead
1428       head_list->Append(new wxExpr(head->GetYOffset()));
1429       head_list->Append(new wxExpr(head->GetSpacing()));
1430
1431       arrow_list->Append(head_list);
1432
1433       node = node->GetNext();
1434     }
1435     clause->AddAttributeValue("arrows", arrow_list);
1436   }
1437 }
1438
1439 void wxLineShape::ReadAttributes(wxExpr *clause)
1440 {
1441   wxShape::ReadAttributes(clause);
1442
1443   int iVal = (int) m_isSpline;
1444   clause->AssignAttributeValue(wxT("is_spline"), &iVal);
1445   m_isSpline = (iVal != 0);
1446
1447   iVal = (int) m_maintainStraightLines;
1448   clause->AssignAttributeValue(wxT("keep_lines_straight"), &iVal);
1449   m_maintainStraightLines = (iVal != 0);
1450
1451   clause->AssignAttributeValue(wxT("align_start"), &m_alignmentStart);
1452   clause->AssignAttributeValue(wxT("align_end"), &m_alignmentEnd);
1453
1454   // Compatibility: check for no regions.
1455   if (m_regions.GetCount() == 0)
1456   {
1457     wxShapeRegion *newRegion = new wxShapeRegion;
1458     newRegion->SetName("Middle");
1459     newRegion->SetSize(150, 50);
1460     m_regions.Append((wxObject *)newRegion);
1461     if (m_text.GetCount() > 0)
1462     {
1463       newRegion->ClearText();
1464       wxNode *node = m_text.GetFirst();
1465       while (node)
1466       {
1467         wxShapeTextLine *textLine = (wxShapeTextLine *)node->GetData();
1468         wxNode *next = node->GetNext();
1469         newRegion->GetFormattedText().Append((wxObject *)textLine);
1470         delete node;
1471         node = next;
1472       }
1473     }
1474
1475     newRegion = new wxShapeRegion;
1476     newRegion->SetName(wxT("Start"));
1477     newRegion->SetSize(150, 50);
1478     m_regions.Append((wxObject *)newRegion);
1479
1480     newRegion = new wxShapeRegion;
1481     newRegion->SetName(wxT("End"));
1482     newRegion->SetSize(150, 50);
1483     m_regions.Append((wxObject *)newRegion);
1484   }
1485
1486   m_attachmentTo = 0;
1487   m_attachmentFrom = 0;
1488
1489   clause->AssignAttributeValue(wxT("attachment_to"), &m_attachmentTo);
1490   clause->AssignAttributeValue(wxT("attachment_from"), &m_attachmentFrom);
1491
1492   wxExpr *line_list = NULL;
1493
1494   // When image is created, there are default control points. Override
1495   // them if there are some in the file.
1496   clause->AssignAttributeValue(wxT("controls"), &line_list);
1497
1498   if (line_list)
1499   {
1500     // Read a list of lists for the spline controls
1501     if (m_lineControlPoints)
1502     {
1503       ClearPointList(*m_lineControlPoints);
1504     }
1505     else
1506       m_lineControlPoints = new wxList;
1507
1508     wxExpr *node = line_list->value.first;
1509
1510     while (node)
1511     {
1512       wxExpr *xexpr = node->value.first;
1513       double x = xexpr->RealValue();
1514
1515       wxExpr *yexpr = xexpr->next;
1516       double y = yexpr->RealValue();
1517
1518       wxRealPoint *point = new wxRealPoint(x, y);
1519       m_lineControlPoints->Append((wxObject*) point);
1520
1521       node = node->next;
1522     }
1523   }
1524
1525   // Read arrow list, for new OGL code
1526   wxExpr *arrow_list = NULL;
1527
1528   clause->AssignAttributeValue(wxT("arrows"), &arrow_list);
1529   if (arrow_list)
1530   {
1531     wxExpr *node = arrow_list->value.first;
1532
1533     while (node)
1534     {
1535       WXTYPE arrowType = ARROW_ARROW;
1536       int arrowEnd = 0;
1537       double xOffset = 0.0;
1538       double arrowSize = 0.0;
1539       wxString arrowName;
1540       long arrowId = -1;
1541
1542       wxExpr *type_expr = node->Nth(0);
1543       wxExpr *end_expr = node->Nth(1);
1544       wxExpr *dist_expr = node->Nth(2);
1545       wxExpr *size_expr = node->Nth(3);
1546       wxExpr *name_expr = node->Nth(4);
1547       wxExpr *id_expr = node->Nth(5);
1548
1549       // New members of wxArrowHead
1550       wxExpr *yOffsetExpr = node->Nth(6);
1551       wxExpr *spacingExpr = node->Nth(7);
1552
1553       if (type_expr)
1554         arrowType = (int)type_expr->IntegerValue();
1555       if (end_expr)
1556         arrowEnd = (int)end_expr->IntegerValue();
1557       if (dist_expr)
1558         xOffset = dist_expr->RealValue();
1559       if (size_expr)
1560         arrowSize = size_expr->RealValue();
1561       if (name_expr)
1562         arrowName = name_expr->StringValue();
1563       if (id_expr)
1564         arrowId = id_expr->IntegerValue();
1565
1566       if (arrowId == -1)
1567         arrowId = wxNewId();
1568       else
1569         wxRegisterId(arrowId);
1570
1571       wxArrowHead *arrowHead = AddArrow(arrowType, arrowEnd, arrowSize, xOffset, arrowName, NULL, arrowId);
1572       if (yOffsetExpr)
1573         arrowHead->SetYOffset(yOffsetExpr->RealValue());
1574       if (spacingExpr)
1575         arrowHead->SetSpacing(spacingExpr->RealValue());
1576
1577       node = node->next;
1578     }
1579   }
1580 }
1581 #endif
1582
1583 void wxLineShape::Copy(wxShape& copy)
1584 {
1585   wxShape::Copy(copy);
1586
1587   wxASSERT( copy.IsKindOf(CLASSINFO(wxLineShape)) );
1588
1589   wxLineShape& lineCopy = (wxLineShape&) copy;
1590
1591   lineCopy.m_to = m_to;
1592   lineCopy.m_from = m_from;
1593   lineCopy.m_attachmentTo = m_attachmentTo;
1594   lineCopy.m_attachmentFrom = m_attachmentFrom;
1595   lineCopy.m_isSpline = m_isSpline;
1596   lineCopy.m_alignmentStart = m_alignmentStart;
1597   lineCopy.m_alignmentEnd = m_alignmentEnd;
1598   lineCopy.m_maintainStraightLines = m_maintainStraightLines;
1599   lineCopy.m_lineOrientations.Clear();
1600
1601   wxNode *node = m_lineOrientations.GetFirst();
1602   while (node)
1603   {
1604     lineCopy.m_lineOrientations.Append(node->GetData());
1605     node = node->GetNext();
1606   }
1607
1608   if (lineCopy.m_lineControlPoints)
1609   {
1610     ClearPointList(*lineCopy.m_lineControlPoints);
1611     delete lineCopy.m_lineControlPoints;
1612   }
1613
1614   lineCopy.m_lineControlPoints = new wxList;
1615
1616   node = m_lineControlPoints->GetFirst();
1617   while (node)
1618   {
1619     wxRealPoint *point = (wxRealPoint *)node->GetData();
1620     wxRealPoint *new_point = new wxRealPoint(point->x, point->y);
1621     lineCopy.m_lineControlPoints->Append((wxObject*) new_point);
1622     node = node->GetNext();
1623   }
1624
1625   // Copy arrows
1626   lineCopy.ClearArrowsAtPosition(-1);
1627   node = m_arcArrows.GetFirst();
1628   while (node)
1629   {
1630     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
1631     lineCopy.m_arcArrows.Append(new wxArrowHead(*arrow));
1632     node = node->GetNext();
1633   }
1634 }
1635
1636 // Override select, to create/delete temporary label-moving objects
1637 void wxLineShape::Select(bool select, wxDC* dc)
1638 {
1639   wxShape::Select(select, dc);
1640   if (select)
1641   {
1642     for (int i = 0; i < 3; i++)
1643     {
1644       wxNode *node = m_regions.Item(i);
1645       if (node)
1646       {
1647         wxShapeRegion *region = (wxShapeRegion *)node->GetData();
1648         if (region->m_formattedText.GetCount() > 0)
1649         {
1650           double w, h, x, y, xx, yy;
1651           region->GetSize(&w, &h);
1652           region->GetPosition(&x, &y);
1653           GetLabelPosition(i, &xx, &yy);
1654           if (m_labelObjects[i])
1655           {
1656             m_labelObjects[i]->Select(FALSE);
1657             m_labelObjects[i]->RemoveFromCanvas(m_canvas);
1658             delete m_labelObjects[i];
1659           }
1660           m_labelObjects[i] = OnCreateLabelShape(this, region, w, h);
1661           m_labelObjects[i]->AddToCanvas(m_canvas);
1662           m_labelObjects[i]->Show(TRUE);
1663           if (dc)
1664             m_labelObjects[i]->Move(*dc, (double)(x + xx), (double)(y + yy));
1665           m_labelObjects[i]->Select(TRUE, dc);
1666         }
1667       }
1668     }
1669   }
1670   else
1671   {
1672     for (int i = 0; i < 3; i++)
1673     {
1674       if (m_labelObjects[i])
1675       {
1676         m_labelObjects[i]->Select(FALSE, dc);
1677         m_labelObjects[i]->Erase(*dc);
1678         m_labelObjects[i]->RemoveFromCanvas(m_canvas);
1679         delete m_labelObjects[i];
1680         m_labelObjects[i] = NULL;
1681       }
1682     }
1683   }
1684 }
1685
1686 /*
1687  * Line control point
1688  *
1689  */
1690
1691 IMPLEMENT_DYNAMIC_CLASS(wxLineControlPoint, wxControlPoint)
1692
1693 wxLineControlPoint::wxLineControlPoint(wxShapeCanvas *theCanvas, wxShape *object, double size, double x, double y, int the_type):
1694   wxControlPoint(theCanvas, object, size, x, y, the_type)
1695 {
1696   m_xpos = x;
1697   m_ypos = y;
1698   m_type = the_type;
1699   m_point = NULL;
1700 }
1701
1702 wxLineControlPoint::~wxLineControlPoint()
1703 {
1704 }
1705
1706 void wxLineControlPoint::OnDraw(wxDC& dc)
1707 {
1708   wxRectangleShape::OnDraw(dc);
1709 }
1710
1711 // Implement movement of Line point
1712 void wxLineControlPoint::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
1713 {
1714     m_shape->GetEventHandler()->OnSizingDragLeft(this, draw, x, y, keys, attachment);
1715 }
1716
1717 void wxLineControlPoint::OnBeginDragLeft(double x, double y, int keys, int attachment)
1718 {
1719     m_shape->GetEventHandler()->OnSizingBeginDragLeft(this, x, y, keys, attachment);
1720 }
1721
1722 void wxLineControlPoint::OnEndDragLeft(double x, double y, int keys, int attachment)
1723 {
1724     m_shape->GetEventHandler()->OnSizingEndDragLeft(this, x, y, keys, attachment);
1725 }
1726
1727 // Control points ('handles') redirect control to the actual shape, to make it easier
1728 // to override sizing behaviour.
1729 void wxLineShape::OnSizingDragLeft(wxControlPoint* pt, bool draw, double x, double y, int keys, int attachment)
1730 {
1731   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1732
1733   wxClientDC dc(GetCanvas());
1734   GetCanvas()->PrepareDC(dc);
1735
1736   dc.SetLogicalFunction(OGLRBLF);
1737
1738   wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1739   dc.SetPen(dottedPen);
1740   dc.SetBrush((* wxTRANSPARENT_BRUSH));
1741
1742   if (lpt->m_type == CONTROL_POINT_LINE)
1743   {
1744     m_canvas->Snap(&x, &y);
1745
1746     lpt->SetX(x); lpt->SetY(y);
1747     lpt->m_point->x = x; lpt->m_point->y = y;
1748
1749     wxLineShape *lineShape = (wxLineShape *)this;
1750
1751     wxPen *old_pen = lineShape->GetPen();
1752     wxBrush *old_brush = lineShape->GetBrush();
1753
1754     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1755     lineShape->SetPen(& dottedPen);
1756     lineShape->SetBrush(wxTRANSPARENT_BRUSH);
1757
1758     lineShape->GetEventHandler()->OnMoveLink(dc, FALSE);
1759
1760     lineShape->SetPen(old_pen);
1761     lineShape->SetBrush(old_brush);
1762   }
1763
1764   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM || lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1765   {
1766 //    lpt->SetX(x); lpt->SetY(y);
1767   }
1768
1769 }
1770
1771 void wxLineShape::OnSizingBeginDragLeft(wxControlPoint* pt, double x, double y, int keys, int attachment)
1772 {
1773   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1774
1775   wxClientDC dc(GetCanvas());
1776   GetCanvas()->PrepareDC(dc);
1777
1778   wxLineShape *lineShape = (wxLineShape *)this;
1779   if (lpt->m_type == CONTROL_POINT_LINE)
1780   {
1781     lpt->m_originalPos = * (lpt->m_point);
1782     m_canvas->Snap(&x, &y);
1783
1784     this->Erase(dc);
1785
1786     // Redraw start and end objects because we've left holes
1787     // when erasing the line
1788     lineShape->GetFrom()->OnDraw(dc);
1789     lineShape->GetFrom()->OnDrawContents(dc);
1790     lineShape->GetTo()->OnDraw(dc);
1791     lineShape->GetTo()->OnDrawContents(dc);
1792
1793     this->SetDisableLabel(TRUE);
1794     dc.SetLogicalFunction(OGLRBLF);
1795
1796     lpt->m_xpos = x; lpt->m_ypos = y;
1797     lpt->m_point->x = x; lpt->m_point->y = y;
1798
1799     wxPen *old_pen = lineShape->GetPen();
1800     wxBrush *old_brush = lineShape->GetBrush();
1801
1802     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1803     lineShape->SetPen(& dottedPen);
1804     lineShape->SetBrush(wxTRANSPARENT_BRUSH);
1805
1806     lineShape->GetEventHandler()->OnMoveLink(dc, FALSE);
1807
1808     lineShape->SetPen(old_pen);
1809     lineShape->SetBrush(old_brush);
1810   }
1811
1812   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM || lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1813   {
1814     m_canvas->SetCursor(wxCursor(wxCURSOR_BULLSEYE));
1815     lpt->m_oldCursor = wxSTANDARD_CURSOR;
1816   }
1817 }
1818
1819 void wxLineShape::OnSizingEndDragLeft(wxControlPoint* pt, double x, double y, int keys, int attachment)
1820 {
1821   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1822
1823   wxClientDC dc(GetCanvas());
1824   GetCanvas()->PrepareDC(dc);
1825
1826   this->SetDisableLabel(FALSE);
1827   wxLineShape *lineShape = (wxLineShape *)this;
1828
1829   if (lpt->m_type == CONTROL_POINT_LINE)
1830   {
1831     m_canvas->Snap(&x, &y);
1832
1833     wxRealPoint pt = wxRealPoint(x, y);
1834
1835     // Move the control point back to where it was;
1836     // MoveControlPoint will move it to the new position
1837     // if it decides it wants. We only moved the position
1838     // during user feedback so we could redraw the line
1839     // as it changed shape.
1840     lpt->m_xpos = lpt->m_originalPos.x; lpt->m_ypos = lpt->m_originalPos.y;
1841     lpt->m_point->x = lpt->m_originalPos.x; lpt->m_point->y = lpt->m_originalPos.y;
1842
1843     OnMoveMiddleControlPoint(dc, lpt, pt);
1844   }
1845   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM)
1846   {
1847     if (lpt->m_oldCursor)
1848       m_canvas->SetCursor(* lpt->m_oldCursor);
1849
1850 //    this->Erase(dc);
1851
1852 //    lpt->m_xpos = x; lpt->m_ypos = y;
1853
1854     if (lineShape->GetFrom())
1855     {
1856       lineShape->GetFrom()->MoveLineToNewAttachment(dc, lineShape, x, y);
1857     }
1858   }
1859   if (lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1860   {
1861     if (lpt->m_oldCursor)
1862       m_canvas->SetCursor(* lpt->m_oldCursor);
1863
1864 //    lpt->m_xpos = x; lpt->m_ypos = y;
1865
1866     if (lineShape->GetTo())
1867     {
1868       lineShape->GetTo()->MoveLineToNewAttachment(dc, lineShape, x, y);
1869     }
1870   }
1871
1872   // Needed?
1873 #if 0
1874   int i = 0;
1875   for (i = 0; i < lineShape->GetLineControlPoints()->GetCount(); i++)
1876     if (((wxRealPoint *)(lineShape->GetLineControlPoints()->Item(i)->GetData())) == lpt->m_point)
1877       break;
1878
1879   // N.B. in OnMoveControlPoint, an event handler in Hardy could have deselected
1880   // the line and therefore deleted 'this'. -> GPF, intermittently.
1881   // So assume at this point that we've been blown away.
1882
1883   lineShape->OnMoveControlPoint(i+1, x, y);
1884 #endif
1885 }
1886
1887 // This is called only when a non-end control point is moved.
1888 bool wxLineShape::OnMoveMiddleControlPoint(wxDC& dc, wxLineControlPoint* lpt, const wxRealPoint& pt)
1889 {
1890     lpt->m_xpos = pt.x; lpt->m_ypos = pt.y;
1891     lpt->m_point->x = pt.x; lpt->m_point->y = pt.y;
1892
1893     GetEventHandler()->OnMoveLink(dc);
1894
1895     return TRUE;
1896 }
1897
1898 // Implement movement of endpoint to a new attachment
1899 // OBSOLETE: done by dragging with the left button.
1900
1901 #if 0
1902 void wxLineControlPoint::OnDragRight(bool draw, double x, double y, int keys, int attachment)
1903 {
1904   if (m_type == CONTROL_POINT_ENDPOINT_FROM || m_type == CONTROL_POINT_ENDPOINT_TO)
1905   {
1906     m_xpos = x; m_ypos = y;
1907   }
1908 }
1909
1910 void wxLineControlPoint::OnBeginDragRight(double x, double y, int keys, int attachment)
1911 {
1912   wxClientDC dc(GetCanvas());
1913   GetCanvas()->PrepareDC(dc);
1914
1915   wxLineShape *lineShape = (wxLineShape *)m_shape;
1916   if (m_type == CONTROL_POINT_ENDPOINT_FROM || m_type == CONTROL_POINT_ENDPOINT_TO)
1917   {
1918     Erase(dc);
1919     lineShape->GetEventHandler()->OnDraw(dc);
1920     if (m_type == CONTROL_POINT_ENDPOINT_FROM)
1921     {
1922       lineShape->GetFrom()->GetEventHandler()->OnDraw(dc);
1923       lineShape->GetFrom()->GetEventHandler()->OnDrawContents(dc);
1924     }
1925     else
1926     {
1927       lineShape->GetTo()->GetEventHandler()->OnDraw(dc);
1928       lineShape->GetTo()->GetEventHandler()->OnDrawContents(dc);
1929     }
1930     m_canvas->SetCursor(wxCursor(wxCURSOR_BULLSEYE));
1931     m_oldCursor = wxSTANDARD_CURSOR;
1932   }
1933 }
1934
1935 void wxLineControlPoint::OnEndDragRight(double x, double y, int keys, int attachment)
1936 {
1937   wxClientDC dc(GetCanvas());
1938   GetCanvas()->PrepareDC(dc);
1939
1940   wxLineShape *lineShape = (wxLineShape *)m_shape;
1941   if (m_type == CONTROL_POINT_ENDPOINT_FROM)
1942   {
1943     if (m_oldCursor)
1944       m_canvas->SetCursor(m_oldCursor);
1945
1946     m_xpos = x; m_ypos = y;
1947
1948     if (lineShape->GetFrom())
1949     {
1950       lineShape->GetFrom()->EraseLinks(dc);
1951
1952       int new_attachment;
1953       double distance;
1954
1955       if (lineShape->GetFrom()->HitTest(x, y, &new_attachment, &distance))
1956         lineShape->SetAttachments(new_attachment, lineShape->GetAttachmentTo());
1957
1958       lineShape->GetFrom()->MoveLinks(dc);
1959     }
1960   }
1961   if (m_type == CONTROL_POINT_ENDPOINT_TO)
1962   {
1963     if (m_oldCursor)
1964       m_canvas->SetCursor(m_oldCursor);
1965     m_shape->Erase(dc);
1966
1967     m_xpos = x; m_ypos = y;
1968
1969     if (lineShape->GetTo())
1970     {
1971       lineShape->GetTo()->EraseLinks(dc);
1972
1973       int new_attachment;
1974       double distance;
1975       if (lineShape->GetTo()->HitTest(x, y, &new_attachment, &distance))
1976         lineShape->SetAttachments(lineShape->GetAttachmentFrom(), new_attachment);
1977
1978       lineShape->GetTo()->MoveLinks(dc);
1979     }
1980   }
1981   int i = 0;
1982   for (i = 0; i < lineShape->GetLineControlPoints()->GetCount(); i++)
1983     if (((wxRealPoint *)(lineShape->GetLineControlPoints()->Item(i)->GetData())) == m_point)
1984       break;
1985   lineShape->OnMoveControlPoint(i+1, x, y);
1986   if (!m_canvas->GetQuickEditMode()) m_canvas->Redraw(dc);
1987 }
1988 #endif
1989
1990 /*
1991  * Get the point on the given line (x1, y1) (x2, y2)
1992  * distance 'length' along from the end,
1993  * returned values in x and y
1994  */
1995
1996 void GetPointOnLine(double x1, double y1, double x2, double y2,
1997                     double length, double *x, double *y)
1998 {
1999   double l = (double)sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1));
2000
2001   if (l < 0.01)
2002     l = (double) 0.01;
2003
2004   double i_bar = (x2 - x1)/l;
2005   double j_bar = (y2 - y1)/l;
2006
2007   *x = (- length*i_bar) + x2;
2008   *y = (- length*j_bar) + y2;
2009 }
2010
2011 wxArrowHead *wxLineShape::AddArrow(WXTYPE type, int end, double size, double xOffset,
2012     const wxString& name, wxPseudoMetaFile *mf, long arrowId)
2013 {
2014   wxArrowHead *arrow = new wxArrowHead(type, end, size, xOffset, name, mf, arrowId);
2015   m_arcArrows.Append(arrow);
2016   return arrow;
2017 }
2018
2019 /*
2020  * Add arrowhead at a particular position in the arrowhead list.
2021  */
2022 bool wxLineShape::AddArrowOrdered(wxArrowHead *arrow, wxList& referenceList, int end)
2023 {
2024   wxNode *refNode = referenceList.GetFirst();
2025   wxNode *currNode = m_arcArrows.GetFirst();
2026   wxString targetName(arrow->GetName());
2027   if (!refNode) return FALSE;
2028
2029   // First check whether we need to insert in front of list,
2030   // because this arrowhead is the first in the reference
2031   // list and should therefore be first in the current list.
2032   wxArrowHead *refArrow = (wxArrowHead *)refNode->GetData();
2033   if (refArrow->GetName() == targetName)
2034   {
2035     m_arcArrows.Insert(arrow);
2036     return TRUE;
2037   }
2038
2039   while (refNode && currNode)
2040   {
2041     wxArrowHead *currArrow = (wxArrowHead *)currNode->GetData();
2042     refArrow = (wxArrowHead *)refNode->GetData();
2043
2044     // Matching: advance current arrow pointer
2045     if ((currArrow->GetArrowEnd() == end) &&
2046         (currArrow->GetName() == refArrow->GetName()))
2047     {
2048       currNode = currNode->GetNext(); // Could be NULL now
2049       if (currNode)
2050         currArrow = (wxArrowHead *)currNode->GetData();
2051     }
2052
2053     // Check if we're at the correct position in the
2054     // reference list
2055     if (targetName == refArrow->GetName())
2056     {
2057       if (currNode)
2058         m_arcArrows.Insert(currNode, arrow);
2059       else
2060         m_arcArrows.Append(arrow);
2061       return TRUE;
2062     }
2063     refNode = refNode->GetNext();
2064   }
2065   m_arcArrows.Append(arrow);
2066   return TRUE;
2067 }
2068
2069 void wxLineShape::ClearArrowsAtPosition(int end)
2070 {
2071   wxNode *node = m_arcArrows.GetFirst();
2072   while (node)
2073   {
2074     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2075     wxNode *next = node->GetNext();
2076     switch (end)
2077     {
2078       case -1:
2079       {
2080         delete arrow;
2081         delete node;
2082         break;
2083       }
2084       case ARROW_POSITION_START:
2085       {
2086         if (arrow->GetArrowEnd() == ARROW_POSITION_START)
2087         {
2088           delete arrow;
2089           delete node;
2090         }
2091         break;
2092       }
2093       case ARROW_POSITION_END:
2094       {
2095         if (arrow->GetArrowEnd() == ARROW_POSITION_END)
2096         {
2097           delete arrow;
2098           delete node;
2099         }
2100         break;
2101       }
2102       case ARROW_POSITION_MIDDLE:
2103       {
2104         if (arrow->GetArrowEnd() == ARROW_POSITION_MIDDLE)
2105         {
2106           delete arrow;
2107           delete node;
2108         }
2109         break;
2110       }
2111     }
2112     node = next;
2113   }
2114 }
2115
2116 bool wxLineShape::ClearArrow(const wxString& name)
2117 {
2118   wxNode *node = m_arcArrows.GetFirst();
2119   while (node)
2120   {
2121     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2122     if (arrow->GetName() == name)
2123     {
2124       delete arrow;
2125       delete node;
2126       return TRUE;
2127     }
2128     node = node->GetNext();
2129   }
2130   return FALSE;
2131 }
2132
2133 /*
2134  * Finds an arrowhead at the given position (if -1, any position)
2135  *
2136  */
2137
2138 wxArrowHead *wxLineShape::FindArrowHead(int position, const wxString& name)
2139 {
2140   wxNode *node = m_arcArrows.GetFirst();
2141   while (node)
2142   {
2143     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2144     if (((position == -1) || (position == arrow->GetArrowEnd())) &&
2145         (arrow->GetName() == name))
2146       return arrow;
2147     node = node->GetNext();
2148   }
2149   return NULL;
2150 }
2151
2152 wxArrowHead *wxLineShape::FindArrowHead(long arrowId)
2153 {
2154   wxNode *node = m_arcArrows.GetFirst();
2155   while (node)
2156   {
2157     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2158     if (arrowId == arrow->GetId())
2159       return arrow;
2160     node = node->GetNext();
2161   }
2162   return NULL;
2163 }
2164
2165 /*
2166  * Deletes an arrowhead at the given position (if -1, any position)
2167  *
2168  */
2169
2170 bool wxLineShape::DeleteArrowHead(int position, const wxString& name)
2171 {
2172   wxNode *node = m_arcArrows.GetFirst();
2173   while (node)
2174   {
2175     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2176     if (((position == -1) || (position == arrow->GetArrowEnd())) &&
2177         (arrow->GetName() == name))
2178     {
2179       delete arrow;
2180       delete node;
2181       return TRUE;
2182     }
2183     node = node->GetNext();
2184   }
2185   return FALSE;
2186 }
2187
2188 // Overloaded DeleteArrowHead: pass arrowhead id.
2189 bool wxLineShape::DeleteArrowHead(long id)
2190 {
2191   wxNode *node = m_arcArrows.GetFirst();
2192   while (node)
2193   {
2194     wxArrowHead *arrow = (wxArrowHead *)node->GetData();
2195     if (arrow->GetId() == id)
2196     {
2197       delete arrow;
2198       delete node;
2199       return TRUE;
2200     }
2201     node = node->GetNext();
2202   }
2203   return FALSE;
2204 }
2205
2206 /*
2207  * Calculate the minimum width a line
2208  * occupies, for the purposes of drawing lines in tools.
2209  *
2210  */
2211
2212 double wxLineShape::FindMinimumWidth()
2213 {
2214   double minWidth = 0.0;
2215   wxNode *node = m_arcArrows.GetFirst();
2216   while (node)
2217   {
2218     wxArrowHead *arrowHead = (wxArrowHead *)node->GetData();
2219     minWidth += arrowHead->GetSize();
2220     if (node->GetNext())
2221       minWidth += arrowHead->GetSpacing();
2222
2223     node = node->GetNext();
2224   }
2225   // We have ABSOLUTE minimum now. So
2226   // scale it to give it reasonable aesthetics
2227   // when drawing with line.
2228   if (minWidth > 0.0)
2229     minWidth = (double)(minWidth * 1.4);
2230   else
2231     minWidth = 20.0;
2232
2233   SetEnds(0.0, 0.0, minWidth, 0.0);
2234   Initialise();
2235
2236   return minWidth;
2237 }
2238
2239 // Find which position we're talking about at this (x, y).
2240 // Returns ARROW_POSITION_START, ARROW_POSITION_MIDDLE, ARROW_POSITION_END
2241 int wxLineShape::FindLinePosition(double x, double y)
2242 {
2243   double startX, startY, endX, endY;
2244   GetEnds(&startX, &startY, &endX, &endY);
2245
2246   // Find distances from centre, start and end. The smallest wins.
2247   double centreDistance = (double)(sqrt((x - m_xpos)*(x - m_xpos) + (y - m_ypos)*(y - m_ypos)));
2248   double startDistance = (double)(sqrt((x - startX)*(x - startX) + (y - startY)*(y - startY)));
2249   double endDistance = (double)(sqrt((x - endX)*(x - endX) + (y - endY)*(y - endY)));
2250
2251   if (centreDistance < startDistance && centreDistance < endDistance)
2252     return ARROW_POSITION_MIDDLE;
2253   else if (startDistance < endDistance)
2254     return ARROW_POSITION_START;
2255   else
2256     return ARROW_POSITION_END;
2257 }
2258
2259 // Set alignment flags
2260 void wxLineShape::SetAlignmentOrientation(bool isEnd, bool isHoriz)
2261 {
2262   if (isEnd)
2263   {
2264     if (isHoriz && ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) != LINE_ALIGNMENT_HORIZ))
2265       m_alignmentEnd |= LINE_ALIGNMENT_HORIZ;
2266     else if (!isHoriz && ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ))
2267       m_alignmentEnd -= LINE_ALIGNMENT_HORIZ;
2268   }
2269   else
2270   {
2271     if (isHoriz && ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) != LINE_ALIGNMENT_HORIZ))
2272       m_alignmentStart |= LINE_ALIGNMENT_HORIZ;
2273     else if (!isHoriz && ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ))
2274       m_alignmentStart -= LINE_ALIGNMENT_HORIZ;
2275   }
2276 }
2277
2278 void wxLineShape::SetAlignmentType(bool isEnd, int alignType)
2279 {
2280   if (isEnd)
2281   {
2282     if (alignType == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2283     {
2284       if ((m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE) != LINE_ALIGNMENT_TO_NEXT_HANDLE)
2285         m_alignmentEnd |= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2286     }
2287     else if ((m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE) == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2288       m_alignmentEnd -= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2289   }
2290   else
2291   {
2292     if (alignType == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2293     {
2294       if ((m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE) != LINE_ALIGNMENT_TO_NEXT_HANDLE)
2295         m_alignmentStart |= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2296     }
2297     else if ((m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE) == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2298       m_alignmentStart -= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2299   }
2300 }
2301
2302 bool wxLineShape::GetAlignmentOrientation(bool isEnd)
2303 {
2304   if (isEnd)
2305     return ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ);
2306   else
2307     return ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ);
2308 }
2309
2310 int wxLineShape::GetAlignmentType(bool isEnd)
2311 {
2312   if (isEnd)
2313     return (m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE);
2314   else
2315     return (m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE);
2316 }
2317
2318 wxRealPoint *wxLineShape::GetNextControlPoint(wxShape *nodeObject)
2319 {
2320   int n = m_lineControlPoints->GetCount();
2321   int nn = 0;
2322   if (m_to == nodeObject)
2323   {
2324     // Must be END of line, so we want (n - 1)th control point.
2325     // But indexing ends at n-1, so subtract 2.
2326     nn = n - 2;
2327   }
2328   else nn = 1;
2329   wxNode *node = m_lineControlPoints->Item(nn);
2330   if (node)
2331   {
2332     return (wxRealPoint *)node->GetData();
2333   }
2334   else
2335     return FALSE;
2336 }
2337
2338 /*
2339  * Arrowhead
2340  *
2341  */
2342
2343 IMPLEMENT_DYNAMIC_CLASS(wxArrowHead, wxObject)
2344
2345 wxArrowHead::wxArrowHead(WXTYPE type, int end, double size, double dist, const wxString& name,
2346                      wxPseudoMetaFile *mf, long arrowId)
2347 {
2348   m_arrowType = type; m_arrowEnd = end; m_arrowSize = size;
2349   m_xOffset = dist;
2350   m_yOffset = 0.0;
2351   m_spacing = 5.0;
2352
2353   m_arrowName = name;
2354   m_metaFile = mf;
2355   m_id = arrowId;
2356   if (m_id == -1)
2357     m_id = wxNewId();
2358 }
2359
2360 wxArrowHead::wxArrowHead(wxArrowHead& toCopy)
2361 {
2362   m_arrowType = toCopy.m_arrowType; m_arrowEnd = toCopy.GetArrowEnd();
2363   m_arrowSize = toCopy.m_arrowSize;
2364   m_xOffset = toCopy.m_xOffset;
2365   m_yOffset = toCopy.m_yOffset;
2366   m_spacing = toCopy.m_spacing;
2367   m_arrowName = toCopy.m_arrowName ;
2368   if (toCopy.m_metaFile)
2369     m_metaFile = new wxPseudoMetaFile(*(toCopy.m_metaFile));
2370   else
2371     m_metaFile = NULL;
2372   m_id = wxNewId();
2373 }
2374
2375 wxArrowHead::~wxArrowHead()
2376 {
2377   if (m_metaFile) delete m_metaFile;
2378 }
2379
2380 void wxArrowHead::SetSize(double size)
2381 {
2382   m_arrowSize = size;
2383   if ((m_arrowType == ARROW_METAFILE) && m_metaFile)
2384   {
2385     double oldWidth = m_metaFile->m_width;
2386     if (oldWidth == 0.0)
2387       return;
2388
2389     double scale = (double)(size/oldWidth);
2390     if (scale != 1.0)
2391       m_metaFile->Scale(scale, scale);
2392   }
2393 }
2394
2395 // Can override this to create a different class of label shape
2396 wxLabelShape* wxLineShape::OnCreateLabelShape(wxLineShape *parent, wxShapeRegion *region, double w, double h)
2397 {
2398     return new wxLabelShape(parent, region, w, h);
2399 }
2400
2401 /*
2402  * Label object
2403  *
2404  */
2405
2406 IMPLEMENT_DYNAMIC_CLASS(wxLabelShape, wxRectangleShape)
2407
2408 wxLabelShape::wxLabelShape(wxLineShape *parent, wxShapeRegion *region, double w, double h):wxRectangleShape(w, h)
2409 {
2410   m_lineShape = parent;
2411   m_shapeRegion = region;
2412   SetPen(wxThePenList->FindOrCreatePen(wxColour(0, 0, 0), 1, wxDOT));
2413 }
2414
2415 wxLabelShape::~wxLabelShape()
2416 {
2417 }
2418
2419 void wxLabelShape::OnDraw(wxDC& dc)
2420 {
2421   if (m_lineShape && !m_lineShape->GetDrawHandles())
2422     return;
2423
2424     double x1 = (double)(m_xpos - m_width/2.0);
2425     double y1 = (double)(m_ypos - m_height/2.0);
2426
2427     if (m_pen)
2428     {
2429       if (m_pen->GetWidth() == 0)
2430         dc.SetPen(* g_oglTransparentPen);
2431       else
2432         dc.SetPen(* m_pen);
2433     }
2434     dc.SetBrush(* wxTRANSPARENT_BRUSH);
2435
2436     if (m_cornerRadius > 0.0)
2437       dc.DrawRoundedRectangle(WXROUND(x1), WXROUND(y1), WXROUND(m_width), WXROUND(m_height), m_cornerRadius);
2438     else
2439       dc.DrawRectangle(WXROUND(x1), WXROUND(y1), WXROUND(m_width), WXROUND(m_height));
2440 }
2441
2442 void wxLabelShape::OnDrawContents(wxDC& dc)
2443 {
2444 }
2445
2446 void wxLabelShape::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
2447 {
2448   wxRectangleShape::OnDragLeft(draw, x, y, keys, attachment);
2449 }
2450
2451 void wxLabelShape::OnBeginDragLeft(double x, double y, int keys, int attachment)
2452 {
2453   wxRectangleShape::OnBeginDragLeft(x, y, keys, attachment);
2454 }
2455
2456 void wxLabelShape::OnEndDragLeft(double x, double y, int keys, int attachment)
2457 {
2458   wxRectangleShape::OnEndDragLeft(x, y, keys, attachment);
2459 }
2460
2461 bool wxLabelShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
2462 {
2463     return m_lineShape->OnLabelMovePre(dc, this, x, y, old_x, old_y, display);
2464 }
2465
2466 bool wxLineShape::OnLabelMovePre(wxDC& dc, wxLabelShape* labelShape, double x, double y, double old_x, double old_y, bool display)
2467 {
2468   labelShape->m_shapeRegion->SetSize(labelShape->GetWidth(), labelShape->GetHeight());
2469
2470   // Find position in line's region list
2471   int i = 0;
2472   wxNode *node = GetRegions().GetFirst();
2473   while (node)
2474   {
2475     if (labelShape->m_shapeRegion == (wxShapeRegion *)node->GetData())
2476       node = NULL;
2477     else
2478     {
2479       node = node->GetNext();
2480       i ++;
2481     }
2482   }
2483   double xx, yy;
2484   GetLabelPosition(i, &xx, &yy);
2485   // Set the region's offset, relative to the default position for
2486   // each region.
2487   labelShape->m_shapeRegion->SetPosition((double)(x - xx), (double)(y - yy));
2488
2489   labelShape->SetX(x);
2490   labelShape->SetY(y);
2491
2492   // Need to reformat to fit region.
2493   if (labelShape->m_shapeRegion->GetText())
2494   {
2495
2496     wxString s(labelShape->m_shapeRegion->GetText());
2497     labelShape->FormatText(dc, s, i);
2498     DrawRegion(dc, labelShape->m_shapeRegion, xx, yy);
2499   }
2500   return TRUE;
2501 }
2502
2503 // Divert left and right clicks to line object
2504 void wxLabelShape::OnLeftClick(double x, double y, int keys, int attachment)
2505 {
2506   m_lineShape->GetEventHandler()->OnLeftClick(x, y, keys, attachment);
2507 }
2508
2509 void wxLabelShape::OnRightClick(double x, double y, int keys, int attachment)
2510 {
2511   m_lineShape->GetEventHandler()->OnRightClick(x, y, keys, attachment);
2512 }
2513