utils/ogl/src/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 #include <wx/wxexpr.h>
  29
  30 #if wxUSE_IOSTREAMH
  31 #include <iostream.h>
  32 #else
  33 #include <iostream>
  34 #endif
  35
  36 #include <ctype.h>
  37 #include <math.h>
  38
  39 #include "basic.h"
  40 #include "basicp.h"
  41 #include "lines.h"
  42 #include "linesp.h"
  43 #include "drawn.h"
  44 #include "misc.h"
  45 #include "canvas.h"
  46
  47 // Line shape
  48 IMPLEMENT_DYNAMIC_CLASS(wxLineShape, wxShape)
  49
  50 wxLineShape::wxLineShape()
  51 {
  52   m_sensitivity = OP_CLICK_LEFT | OP_CLICK_RIGHT;
  53   m_draggable = FALSE;
  54   m_attachmentTo = 0;
  55   m_attachmentFrom = 0;
  56 /*
  57   m_actualTextWidth = 0.0;
  58   m_actualTextHeight = 0.0;
  59 */
  60   m_from = NULL;
  61   m_to = NULL;
  62   m_erasing = FALSE;
  63   m_arrowSpacing = 5.0; // For the moment, don't bother saving this to file.
  64   m_ignoreArrowOffsets = FALSE;
  65   m_isSpline = FALSE;
  66   m_maintainStraightLines = FALSE;
  67   m_alignmentStart = 0;
  68   m_alignmentEnd = 0;
  69
  70   m_lineControlPoints = NULL;
  71
  72   // Clear any existing regions (created in an earlier constructor)
  73   // and make the three line regions.
  74   ClearRegions();
  75   wxShapeRegion *newRegion = new wxShapeRegion;
  76   newRegion->SetName("Middle");
  77   newRegion->SetSize(150, 50);
  78   m_regions.Append((wxObject *)newRegion);
  79
  80   newRegion = new wxShapeRegion;
  81   newRegion->SetName("Start");
  82   newRegion->SetSize(150, 50);
  83   m_regions.Append((wxObject *)newRegion);
  84
  85   newRegion = new wxShapeRegion;
  86   newRegion->SetName("End");
  87   newRegion->SetSize(150, 50);
  88   m_regions.Append((wxObject *)newRegion);
  89
  90   for (int i = 0; i < 3; i++)
  91     m_labelObjects[i] = NULL;
  92 }
  93
  94 wxLineShape::~wxLineShape()
  95 {
  96   if (m_lineControlPoints)
  97   {
  98     ClearPointList(*m_lineControlPoints);
  99     delete m_lineControlPoints;
 100   }
 101   for (int i = 0; i < 3; i++)
 102   {
 103     if (m_labelObjects[i])
 104     {
 105       m_labelObjects[i]->Select(FALSE);
 106       m_labelObjects[i]->RemoveFromCanvas(m_canvas);
 107       delete m_labelObjects[i];
 108       m_labelObjects[i] = NULL;
 109     }
 110   }
 111   ClearArrowsAtPosition(-1);
 112 }
 113
 114 void wxLineShape::MakeLineControlPoints(int n)
 115 {
 116   if (m_lineControlPoints)
 117   {
 118     ClearPointList(*m_lineControlPoints);
 119     delete m_lineControlPoints;
 120   }
 121   m_lineControlPoints = new wxList;
 122
 123   int i = 0;
 124   for (i = 0; i < n; i++)
 125   {
 126     wxRealPoint *point = new wxRealPoint(-999, -999);
 127     m_lineControlPoints->Append((wxObject*) point);
 128   }
 129 }
 130
 131 wxNode *wxLineShape::InsertLineControlPoint(wxDC* dc)
 132 {
 133     if (dc)
 134         Erase(*dc);
 135
 136   wxNode *last = m_lineControlPoints->Last();
 137   wxNode *second_last = last->Previous();
 138   wxRealPoint *last_point = (wxRealPoint *)last->Data();
 139   wxRealPoint *second_last_point = (wxRealPoint *)second_last->Data();
 140
 141   // Choose a point half way between the last and penultimate points
 142   double line_x = ((last_point->x + second_last_point->x)/2);
 143   double line_y = ((last_point->y + second_last_point->y)/2);
 144
 145   wxRealPoint *point = new wxRealPoint(line_x, line_y);
 146   wxNode *node = m_lineControlPoints->Insert(last, (wxObject*) point);
 147   return node;
 148 }
 149
 150 bool wxLineShape::DeleteLineControlPoint()
 151 {
 152   if (m_lineControlPoints->Number() < 3)
 153     return FALSE;
 154
 155   wxNode *last = m_lineControlPoints->Last();
 156   wxNode *second_last = last->Previous();
 157
 158   wxRealPoint *second_last_point = (wxRealPoint *)second_last->Data();
 159   delete second_last_point;
 160   delete second_last;
 161
 162   return TRUE;
 163 }
 164
 165 void wxLineShape::Initialise()
 166 {
 167   if (m_lineControlPoints)
 168   {
 169     // Just move the first and last control points
 170     wxNode *first = m_lineControlPoints->First();
 171     wxRealPoint *first_point = (wxRealPoint *)first->Data();
 172
 173     wxNode *last = m_lineControlPoints->Last();
 174     wxRealPoint *last_point = (wxRealPoint *)last->Data();
 175
 176     // If any of the line points are at -999, we must
 177     // initialize them by placing them half way between the first
 178     // and the last.
 179     wxNode *node = first->Next();
 180     while (node)
 181     {
 182       wxRealPoint *point = (wxRealPoint *)node->Data();
 183       if (point->x == -999)
 184       {
 185         double x1, y1, x2, y2;
 186         if (first_point->x < last_point->x)
 187           { x1 = first_point->x; x2 = last_point->x; }
 188         else
 189           { x2 = first_point->x; x1 = last_point->x; }
 190
 191         if (first_point->y < last_point->y)
 192           { y1 = first_point->y; y2 = last_point->y; }
 193         else
 194           { y2 = first_point->y; y1 = last_point->y; }
 195
 196         point->x = ((x2 - x1)/2 + x1);
 197         point->y = ((y2 - y1)/2 + y1);
 198       }
 199       node = node->Next();
 200     }
 201   }
 202 }
 203
 204 // Format a text string according to the region size, adding
 205 // strings with positions to region text list
 206 void wxLineShape::FormatText(wxDC& dc, const wxString& s, int i)
 207 {
 208   double w, h;
 209   ClearText(i);
 210
 211   if (m_regions.Number() < 1)
 212     return;
 213   wxNode *node = m_regions.Nth(i);
 214   if (!node)
 215     return;
 216
 217   wxShapeRegion *region = (wxShapeRegion *)node->Data();
 218   region->SetText(s);
 219   dc.SetFont(region->GetFont());
 220
 221   region->GetSize(&w, &h);
 222   // Initialize the size if zero
 223   if (((w == 0) || (h == 0)) && (strlen(s) > 0))
 224   {
 225     w = 100; h = 50;
 226     region->SetSize(w, h);
 227   }
 228
 229   wxStringList *string_list = oglFormatText(dc, s, (w-5), (h-5), region->GetFormatMode());
 230   node = string_list->First();
 231   while (node)
 232   {
 233     char *s = (char *)node->Data();
 234     wxShapeTextLine *line = new wxShapeTextLine(0.0, 0.0, s);
 235     region->GetFormattedText().Append((wxObject *)line);
 236     node = node->Next();
 237   }
 238   delete string_list;
 239   double actualW = w;
 240   double actualH = h;
 241   if (region->GetFormatMode() & FORMAT_SIZE_TO_CONTENTS)
 242   {
 243     oglGetCentredTextExtent(dc, &(region->GetFormattedText()), m_xpos, m_ypos, w, h, &actualW, &actualH);
 244     if ((actualW != w ) || (actualH != h))
 245     {
 246       double xx, yy;
 247       GetLabelPosition(i, &xx, &yy);
 248       EraseRegion(dc, region, xx, yy);
 249       if (m_labelObjects[i])
 250       {
 251         m_labelObjects[i]->Select(FALSE, &dc);
 252         m_labelObjects[i]->Erase(dc);
 253         m_labelObjects[i]->SetSize(actualW, actualH);
 254       }
 255
 256       region->SetSize(actualW, actualH);
 257
 258       if (m_labelObjects[i])
 259       {
 260         m_labelObjects[i]->Select(TRUE, & dc);
 261         m_labelObjects[i]->Draw(dc);
 262       }
 263     }
 264   }
 265   oglCentreText(dc, &(region->GetFormattedText()), m_xpos, m_ypos, actualW, actualH, region->GetFormatMode());
 266   m_formatted = TRUE;
 267 }
 268
 269 void wxLineShape::DrawRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
 270 {
 271   if (GetDisableLabel())
 272     return;
 273
 274   double w, h;
 275   double xx, yy;
 276   region->GetSize(&w, &h);
 277
 278   // Get offset from x, y
 279   region->GetPosition(&xx, &yy);
 280
 281   double xp = xx + x;
 282   double yp = yy + y;
 283
 284   // First, clear a rectangle for the text IF there is any
 285   if (region->GetFormattedText().Number() > 0)
 286   {
 287       dc.SetPen(g_oglWhiteBackgroundPen);
 288       dc.SetBrush(g_oglWhiteBackgroundBrush);
 289
 290       // Now draw the text
 291       if (region->GetFont()) dc.SetFont(region->GetFont());
 292
 293       dc.DrawRectangle((double)(xp - w/2.0), (double)(yp - h/2.0), (double)w, (double)h);
 294
 295       if (m_pen) dc.SetPen(m_pen);
 296       dc.SetTextForeground(* region->GetActualColourObject());
 297
 298 #ifdef __WXMSW__
 299       dc.SetTextBackground(g_oglWhiteBackgroundBrush->GetColour());
 300 #endif
 301
 302       oglDrawFormattedText(dc, &(region->GetFormattedText()), xp, yp, w, h, region->GetFormatMode());
 303   }
 304 }
 305
 306 void wxLineShape::EraseRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
 307 {
 308   if (GetDisableLabel())
 309     return;
 310
 311   double w, h;
 312   double xx, yy;
 313   region->GetSize(&w, &h);
 314
 315   // Get offset from x, y
 316   region->GetPosition(&xx, &yy);
 317
 318   double xp = xx + x;
 319   double yp = yy + y;
 320
 321   if (region->GetFormattedText().Number() > 0)
 322   {
 323       dc.SetPen(g_oglWhiteBackgroundPen);
 324       dc.SetBrush(g_oglWhiteBackgroundBrush);
 325
 326       dc.DrawRectangle((double)(xp - w/2.0), (double)(yp - h/2.0), (double)w, (double)h);
 327   }
 328 }
 329
 330 // Get the reference point for a label. Region x and y
 331 // are offsets from this.
 332 // position is 0, 1, 2
 333 void wxLineShape::GetLabelPosition(int position, double *x, double *y)
 334 {
 335   switch (position)
 336   {
 337     case 0:
 338     {
 339       // Want to take the middle section for the label
 340       int n = m_lineControlPoints->Number();
 341       int half_way = (int)(n/2);
 342
 343       // Find middle of this line
 344       wxNode *node = m_lineControlPoints->Nth(half_way - 1);
 345       wxRealPoint *point = (wxRealPoint *)node->Data();
 346       wxNode *next_node = node->Next();
 347       wxRealPoint *next_point = (wxRealPoint *)next_node->Data();
 348
 349       double dx = (next_point->x - point->x);
 350       double dy = (next_point->y - point->y);
 351       *x = (double)(point->x + dx/2.0);
 352       *y = (double)(point->y + dy/2.0);
 353       break;
 354     }
 355     case 1:
 356     {
 357       wxNode *node = m_lineControlPoints->First();
 358       *x = ((wxRealPoint *)node->Data())->x;
 359       *y = ((wxRealPoint *)node->Data())->y;
 360       break;
 361     }
 362     case 2:
 363     {
 364       wxNode *node = m_lineControlPoints->Last();
 365       *x = ((wxRealPoint *)node->Data())->x;
 366       *y = ((wxRealPoint *)node->Data())->y;
 367       break;
 368     }
 369     default:
 370       break;
 371   }
 372 }
 373
 374 /*
 375  * Find whether line is supposed to be vertical or horizontal and
 376  * make it so.
 377  *
 378  */
 379 void GraphicsStraightenLine(wxRealPoint *point1, wxRealPoint *point2)
 380 {
 381   double dx = point2->x - point1->x;
 382   double dy = point2->y - point1->y;
 383
 384   if (dx == 0.0)
 385     return;
 386   else if (fabs(dy/dx) > 1.0)
 387   {
 388     point2->x = point1->x;
 389   }
 390   else point2->y = point1->y;
 391 }
 392
 393 void wxLineShape::Straighten(wxDC *dc)
 394 {
 395   if (!m_lineControlPoints || m_lineControlPoints->Number() < 3)
 396     return;
 397
 398   if (dc)
 399     Erase(* dc);
 400
 401   wxNode *first_point_node = m_lineControlPoints->First();
 402   wxNode *last_point_node = m_lineControlPoints->Last();
 403   wxNode *second_last_point_node = last_point_node->Previous();
 404
 405   wxRealPoint *last_point = (wxRealPoint *)last_point_node->Data();
 406   wxRealPoint *second_last_point = (wxRealPoint *)second_last_point_node->Data();
 407
 408   GraphicsStraightenLine(last_point, second_last_point);
 409
 410   wxNode *node = first_point_node;
 411   while (node && (node != second_last_point_node))
 412   {
 413     wxRealPoint *point = (wxRealPoint *)node->Data();
 414     wxRealPoint *next_point = (wxRealPoint *)(node->Next()->Data());
 415
 416     GraphicsStraightenLine(point, next_point);
 417     node = node->Next();
 418   }
 419
 420   if (dc)
 421     Draw(* dc);
 422 }
 423
 424
 425 void wxLineShape::Unlink()
 426 {
 427   if (m_to)
 428     m_to->GetLines().DeleteObject(this);
 429   if (m_from)
 430     m_from->GetLines().DeleteObject(this);
 431   m_to = NULL;
 432   m_from = NULL;
 433 }
 434
 435 void wxLineShape::SetEnds(double x1, double y1, double x2, double y2)
 436 {
 437   // Find centre point
 438   wxNode *first_point_node = m_lineControlPoints->First();
 439   wxNode *last_point_node = m_lineControlPoints->Last();
 440   wxRealPoint *first_point = (wxRealPoint *)first_point_node->Data();
 441   wxRealPoint *last_point = (wxRealPoint *)last_point_node->Data();
 442
 443   first_point->x = x1;
 444   first_point->y = y1;
 445   last_point->x = x2;
 446   last_point->y = y2;
 447
 448   m_xpos = (double)((x1 + x2)/2.0);
 449   m_ypos = (double)((y1 + y2)/2.0);
 450 }
 451
 452 // Get absolute positions of ends
 453 void wxLineShape::GetEnds(double *x1, double *y1, double *x2, double *y2)
 454 {
 455   wxNode *first_point_node = m_lineControlPoints->First();
 456   wxNode *last_point_node = m_lineControlPoints->Last();
 457   wxRealPoint *first_point = (wxRealPoint *)first_point_node->Data();
 458   wxRealPoint *last_point = (wxRealPoint *)last_point_node->Data();
 459
 460   *x1 = first_point->x; *y1 = first_point->y;
 461   *x2 = last_point->x; *y2 = last_point->y;
 462 }
 463
 464 void wxLineShape::SetAttachments(int from_attach, int to_attach)
 465 {
 466   m_attachmentFrom = from_attach;
 467   m_attachmentTo = to_attach;
 468 }
 469
 470 bool wxLineShape::HitTest(double x, double y, int *attachment, double *distance)
 471 {
 472   if (!m_lineControlPoints)
 473     return FALSE;
 474
 475   // Look at label regions in case mouse is over a label
 476   bool inLabelRegion = FALSE;
 477   for (int i = 0; i < 3; i ++)
 478   {
 479     wxNode *regionNode = m_regions.Nth(i);
 480     if (regionNode)
 481     {
 482       wxShapeRegion *region = (wxShapeRegion *)regionNode->Data();
 483       if (region->m_formattedText.Number() > 0)
 484       {
 485         double xp, yp, cx, cy, cw, ch;
 486         GetLabelPosition(i, &xp, &yp);
 487         // Offset region from default label position
 488         region->GetPosition(&cx, &cy);
 489         region->GetSize(&cw, &ch);
 490         cx += xp;
 491         cy += yp;
 492         double rLeft = (double)(cx - (cw/2.0));
 493         double rTop = (double)(cy - (ch/2.0));
 494         double rRight = (double)(cx + (cw/2.0));
 495         double rBottom = (double)(cy + (ch/2.0));
 496         if (x > rLeft && x < rRight && y > rTop && y < rBottom)
 497         {
 498           inLabelRegion = TRUE;
 499           i = 3;
 500         }
 501       }
 502     }
 503   }
 504
 505   wxNode *node = m_lineControlPoints->First();
 506
 507   while (node && node->Next())
 508   {
 509     wxRealPoint *point1 = (wxRealPoint *)node->Data();
 510     wxRealPoint *point2 = (wxRealPoint *)node->Next()->Data();
 511
 512     // Allow for inaccurate mousing or vert/horiz lines
 513     int extra = 4;
 514     double left = wxMin(point1->x, point2->x) - extra;
 515     double right = wxMax(point1->x, point2->x) + extra;
 516
 517     double bottom = wxMin(point1->y, point2->y) - extra;
 518     double top = wxMax(point1->y, point2->y) + extra;
 519
 520     if ((x > left && x < right && y > bottom && y < top) || inLabelRegion)
 521     {
 522       // Work out distance from centre of line
 523       double centre_x = (double)(left + (right - left)/2.0);
 524       double centre_y = (double)(bottom + (top - bottom)/2.0);
 525
 526       *attachment = 0;
 527       *distance = (double)sqrt((centre_x - x)*(centre_x - x) + (centre_y - y)*(centre_y - y));
 528       return TRUE;
 529     }
 530
 531     node = node->Next();
 532   }
 533   return FALSE;
 534 }
 535
 536 void wxLineShape::DrawArrows(wxDC& dc)
 537 {
 538   // Distance along line of each arrow: space them out evenly.
 539   double startArrowPos = 0.0;
 540   double endArrowPos = 0.0;
 541   double middleArrowPos = 0.0;
 542
 543   wxNode *node = m_arcArrows.First();
 544   while (node)
 545   {
 546     wxArrowHead *arrow = (wxArrowHead *)node->Data();
 547     switch (arrow->GetArrowEnd())
 548     {
 549       case ARROW_POSITION_START:
 550       {
 551         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 552           // If specified, x offset is proportional to line length
 553           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 554         else
 555         {
 556           DrawArrow(dc, arrow, startArrowPos, FALSE);      // Absolute distance
 557           startArrowPos += arrow->GetSize() + arrow->GetSpacing();
 558         }
 559         break;
 560       }
 561       case ARROW_POSITION_END:
 562       {
 563         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 564           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 565         else
 566         {
 567           DrawArrow(dc, arrow, endArrowPos, FALSE);
 568           endArrowPos += arrow->GetSize() + arrow->GetSpacing();
 569         }
 570         break;
 571       }
 572       case ARROW_POSITION_MIDDLE:
 573       {
 574         arrow->SetXOffset(middleArrowPos);
 575         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 576           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 577         else
 578         {
 579           DrawArrow(dc, arrow, middleArrowPos, FALSE);
 580           middleArrowPos += arrow->GetSize() + arrow->GetSpacing();
 581         }
 582         break;
 583       }
 584     }
 585     node = node->Next();
 586   }
 587 }
 588
 589 void wxLineShape::DrawArrow(wxDC& dc, wxArrowHead *arrow, double xOffset, bool proportionalOffset)
 590 {
 591   wxNode *first_line_node = m_lineControlPoints->First();
 592   wxRealPoint *first_line_point = (wxRealPoint *)first_line_node->Data();
 593   wxNode *second_line_node = first_line_node->Next();
 594   wxRealPoint *second_line_point = (wxRealPoint *)second_line_node->Data();
 595
 596   wxNode *last_line_node = m_lineControlPoints->Last();
 597   wxRealPoint *last_line_point = (wxRealPoint *)last_line_node->Data();
 598   wxNode *second_last_line_node = last_line_node->Previous();
 599   wxRealPoint *second_last_line_point = (wxRealPoint *)second_last_line_node->Data();
 600
 601   // Position where we want to start drawing
 602   double positionOnLineX, positionOnLineY;
 603
 604   // Position of start point of line, at the end of which we draw the arrow.
 605   double startPositionX, startPositionY;
 606
 607   switch (arrow->GetPosition())
 608   {
 609     case ARROW_POSITION_START:
 610     {
 611       // If we're using a proportional offset, calculate just where this will
 612       // be on the line.
 613       double realOffset = xOffset;
 614       if (proportionalOffset)
 615       {
 616         double totalLength =
 617           (double)sqrt((second_line_point->x - first_line_point->x)*(second_line_point->x - first_line_point->x) +
 618                       (second_line_point->y - first_line_point->y)*(second_line_point->y - first_line_point->y));
 619         realOffset = (double)(xOffset * totalLength);
 620       }
 621       GetPointOnLine(second_line_point->x, second_line_point->y,
 622                      first_line_point->x, first_line_point->y,
 623                      realOffset, &positionOnLineX, &positionOnLineY);
 624       startPositionX = second_line_point->x;
 625       startPositionY = second_line_point->y;
 626       break;
 627     }
 628     case ARROW_POSITION_END:
 629     {
 630       // If we're using a proportional offset, calculate just where this will
 631       // be on the line.
 632       double realOffset = xOffset;
 633       if (proportionalOffset)
 634       {
 635         double totalLength =
 636           (double)sqrt((second_last_line_point->x - last_line_point->x)*(second_last_line_point->x - last_line_point->x) +
 637                       (second_last_line_point->y - last_line_point->y)*(second_last_line_point->y - last_line_point->y));
 638         realOffset = (double)(xOffset * totalLength);
 639       }
 640       GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
 641                      last_line_point->x, last_line_point->y,
 642                      realOffset, &positionOnLineX, &positionOnLineY);
 643       startPositionX = second_last_line_point->x;
 644       startPositionY = second_last_line_point->y;
 645       break;
 646     }
 647     case ARROW_POSITION_MIDDLE:
 648     {
 649       // Choose a point half way between the last and penultimate points
 650       double x = ((last_line_point->x + second_last_line_point->x)/2);
 651       double y = ((last_line_point->y + second_last_line_point->y)/2);
 652
 653       // If we're using a proportional offset, calculate just where this will
 654       // be on the line.
 655       double realOffset = xOffset;
 656       if (proportionalOffset)
 657       {
 658         double totalLength =
 659           (double)sqrt((second_last_line_point->x - x)*(second_last_line_point->x - x) +
 660                       (second_last_line_point->y - y)*(second_last_line_point->y - y));
 661         realOffset = (double)(xOffset * totalLength);
 662       }
 663
 664       GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
 665                      x, y, realOffset, &positionOnLineX, &positionOnLineY);
 666       startPositionX = second_last_line_point->x;
 667       startPositionY = second_last_line_point->y;
 668       break;
 669     }
 670   }
 671
 672   /*
 673    * Add yOffset to arrow, if any
 674    */
 675
 676   const double myPi = (double) 3.14159265;
 677   // The translation that the y offset may give
 678   double deltaX = 0.0;
 679   double deltaY = 0.0;
 680   if ((arrow->GetYOffset() != 0.0) && !m_ignoreArrowOffsets)
 681   {
 682     /*
 683                                  |(x4, y4)
 684                                  |d
 685                                  |
 686        (x1, y1)--------------(x3, y3)------------------(x2, y2)
 687        x4 = x3 - d * sin(theta)
 688        y4 = y3 + d * cos(theta)
 689
 690        Where theta = tan(-1) of (y3-y1)/(x3-x1)
 691      */
 692      double x1 = startPositionX;
 693      double y1 = startPositionY;
 694      double x3 = positionOnLineX;
 695      double y3 = positionOnLineY;
 696      double d = -arrow->GetYOffset(); // Negate so +offset is above line
 697
 698      double theta = 0.0;
 699      if (x3 == x1)
 700        theta = (double)(myPi/2.0);
 701      else
 702        theta = (double)atan((y3-y1)/(x3-x1));
 703
 704      double x4 = (double)(x3 - (d*sin(theta)));
 705      double y4 = (double)(y3 + (d*cos(theta)));
 706
 707      deltaX = x4 - positionOnLineX;
 708      deltaY = y4 - positionOnLineY;
 709   }
 710
 711   switch (arrow->_GetType())
 712   {
 713     case ARROW_ARROW:
 714     {
 715       double arrowLength = arrow->GetSize();
 716       double arrowWidth = (double)(arrowLength/3.0);
 717
 718       double tip_x, tip_y, side1_x, side1_y, side2_x, side2_y;
 719       oglGetArrowPoints(startPositionX+deltaX, startPositionY+deltaY,
 720                        positionOnLineX+deltaX, positionOnLineY+deltaY,
 721                        arrowLength, arrowWidth, &tip_x, &tip_y,
 722                        &side1_x, &side1_y, &side2_x, &side2_y);
 723
 724       wxPoint points[4];
 725       points[0].x = tip_x; points[0].y = tip_y;
 726       points[1].x = side1_x; points[1].y = side1_y;
 727       points[2].x = side2_x; points[2].y = side2_y;
 728       points[3].x = tip_x; points[3].y = tip_y;
 729
 730       dc.SetPen(m_pen);
 731       dc.SetBrush(m_brush);
 732       dc.DrawPolygon(4, points);
 733       break;
 734     }
 735     case ARROW_HOLLOW_CIRCLE:
 736     case ARROW_FILLED_CIRCLE:
 737     {
 738       // Find point on line of centre of circle, which is a radius away
 739       // from the end position
 740       double diameter = (double)(arrow->GetSize());
 741       double x, y;
 742       GetPointOnLine(startPositionX+deltaX, startPositionY+deltaY,
 743                    positionOnLineX+deltaX, positionOnLineY+deltaY,
 744                    (double)(diameter/2.0),
 745                    &x, &y);
 746
 747       // Convert ellipse centre to top-left coordinates
 748       double x1 = (double)(x - (diameter/2.0));
 749       double y1 = (double)(y - (diameter/2.0));
 750
 751       dc.SetPen(m_pen);
 752       if (arrow->_GetType() == ARROW_HOLLOW_CIRCLE)
 753         dc.SetBrush(g_oglWhiteBackgroundBrush);
 754       else
 755         dc.SetBrush(m_brush);
 756
 757       dc.DrawEllipse(x1, y1, diameter, diameter);
 758       break;
 759     }
 760     case ARROW_SINGLE_OBLIQUE:
 761     {
 762       break;
 763     }
 764     case ARROW_METAFILE:
 765     {
 766       if (arrow->GetMetaFile())
 767       {
 768         // Find point on line of centre of object, which is a half-width away
 769         // from the end position
 770         /*
 771          *                width
 772          * <-- start pos  <-----><-- positionOnLineX
 773          *                _____
 774          * --------------|  x  | <-- e.g. rectangular arrowhead
 775          *                -----
 776          */
 777         double x, y;
 778         GetPointOnLine(startPositionX, startPositionY,
 779                    positionOnLineX, positionOnLineY,
 780                    (double)(arrow->GetMetaFile()->m_width/2.0),
 781                    &x, &y);
 782
 783         // Calculate theta for rotating the metafile.
 784         /*
 785           |
 786           |     o(x2, y2)   'o' represents the arrowhead.
 787           |    /
 788           |   /
 789           |  /theta
 790           | /(x1, y1)
 791           |______________________
 792         */
 793         double theta = 0.0;
 794         double x1 = startPositionX;
 795         double y1 = startPositionY;
 796         double x2 = positionOnLineX;
 797         double y2 = positionOnLineY;
 798
 799         if ((x1 == x2) && (y1 == y2))
 800           theta = 0.0;
 801
 802         else if ((x1 == x2) && (y1 > y2))
 803           theta = (double)(3.0*myPi/2.0);
 804
 805         else if ((x1 == x2) && (y2 > y1))
 806           theta = (double)(myPi/2.0);
 807
 808         else if ((x2 > x1) && (y2 >= y1))
 809           theta = (double)atan((y2 - y1)/(x2 - x1));
 810
 811         else if (x2 < x1)
 812           theta = (double)(myPi + atan((y2 - y1)/(x2 - x1)));
 813
 814         else if ((x2 > x1) && (y2 < y1))
 815           theta = (double)(2*myPi + atan((y2 - y1)/(x2 - x1)));
 816
 817         else
 818         {
 819           wxFatalError("Unknown arrowhead rotation case in lines.cc");
 820         }
 821
 822         // Rotate about the centre of the object, then place
 823         // the object on the line.
 824         if (arrow->GetMetaFile()->GetRotateable())
 825           arrow->GetMetaFile()->Rotate(0.0, 0.0, theta);
 826
 827         if (m_erasing)
 828         {
 829           // If erasing, just draw a rectangle.
 830           double minX, minY, maxX, maxY;
 831           arrow->GetMetaFile()->GetBounds(&minX, &minY, &maxX, &maxY);
 832           // Make erasing rectangle slightly bigger or you get droppings.
 833           int extraPixels = 4;
 834           dc.DrawRectangle((double)(deltaX + x + minX - (extraPixels/2.0)), (double)(deltaY + y + minY - (extraPixels/2.0)),
 835                            (double)(maxX - minX + extraPixels), (double)(maxY - minY + extraPixels));
 836         }
 837         else
 838           arrow->GetMetaFile()->Draw(dc, x+deltaX, y+deltaY);
 839       }
 840       break;
 841     }
 842     default:
 843     {
 844     }
 845   }
 846 }
 847
 848 void wxLineShape::OnErase(wxDC& dc)
 849 {
 850     wxPen *old_pen = m_pen;
 851     wxBrush *old_brush = m_brush;
 852     SetPen(g_oglWhiteBackgroundPen);
 853     SetBrush(g_oglWhiteBackgroundBrush);
 854
 855     double bound_x, bound_y;
 856     GetBoundingBoxMax(&bound_x, &bound_y);
 857     if (m_font) dc.SetFont(m_font);
 858
 859     // Undraw text regions
 860     for (int i = 0; i < 3; i++)
 861     {
 862       wxNode *node = m_regions.Nth(i);
 863       if (node)
 864       {
 865         double x, y;
 866         wxShapeRegion *region = (wxShapeRegion *)node->Data();
 867         GetLabelPosition(i, &x, &y);
 868         EraseRegion(dc, region, x, y);
 869       }
 870     }
 871
 872     // Undraw line
 873     dc.SetPen(g_oglWhiteBackgroundPen);
 874     dc.SetBrush(g_oglWhiteBackgroundBrush);
 875
 876     // Drawing over the line only seems to work if the line has a thickness
 877     // of 1.
 878     if (old_pen && (old_pen->GetWidth() > 1))
 879     {
 880       dc.DrawRectangle((double)(m_xpos - (bound_x/2.0) - 2.0), (double)(m_ypos - (bound_y/2.0) - 2.0),
 881                         (double)(bound_x+4.0),  (double)(bound_y+4.0));
 882     }
 883     else
 884     {
 885       m_erasing = TRUE;
 886       GetEventHandler()->OnDraw(dc);
 887       GetEventHandler()->OnEraseControlPoints(dc);
 888       m_erasing = FALSE;
 889     }
 890
 891     if (old_pen) SetPen(old_pen);
 892     if (old_brush) SetBrush(old_brush);
 893 }
 894
 895 void wxLineShape::GetBoundingBoxMin(double *w, double *h)
 896 {
 897   double x1 = 10000;
 898   double y1 = 10000;
 899   double x2 = -10000;
 900   double y2 = -10000;
 901
 902   wxNode *node = m_lineControlPoints->First();
 903   while (node)
 904   {
 905     wxRealPoint *point = (wxRealPoint *)node->Data();
 906
 907     if (point->x < x1) x1 = point->x;
 908     if (point->y < y1) y1 = point->y;
 909     if (point->x > x2) x2 = point->x;
 910     if (point->y > y2) y2 = point->y;
 911
 912     node = node->Next();
 913   }
 914   *w = (double)(x2 - x1);
 915   *h = (double)(y2 - y1);
 916 }
 917
 918 /*
 919  * For a node image of interest, finds the position of this arc
 920  * amongst all the arcs which are attached to THIS SIDE of the node image,
 921  * and the number of same.
 922  */
 923 void wxLineShape::FindNth(wxShape *image, int *nth, int *no_arcs, bool incoming)
 924 {
 925   int n = -1;
 926   int num = 0;
 927   wxNode *node = image->GetLines().First();
 928   int this_attachment;
 929   if (image == m_to)
 930     this_attachment = m_attachmentTo;
 931   else
 932     this_attachment = m_attachmentFrom;
 933
 934   // Find number of lines going into/out of this particular attachment point
 935   while (node)
 936   {
 937     wxLineShape *line = (wxLineShape *)node->Data();
 938
 939     if (line->m_from == image)
 940     {
 941       // This is the nth line attached to 'image'
 942       if ((line == this) && !incoming)
 943         n = num;
 944
 945       // Increment num count if this is the same side (attachment number)
 946       if (line->m_attachmentFrom == this_attachment)
 947         num ++;
 948     }
 949
 950     if (line->m_to == image)
 951     {
 952       // This is the nth line attached to 'image'
 953       if ((line == this) && incoming)
 954         n = num;
 955
 956       // Increment num count if this is the same side (attachment number)
 957       if (line->m_attachmentTo == this_attachment)
 958         num ++;
 959     }
 960
 961     node = node->Next();
 962   }
 963   *nth = n;
 964   *no_arcs = num;
 965 }
 966
 967 void wxLineShape::OnDrawOutline(wxDC& dc, double x, double y, double w, double h)
 968 {
 969   wxPen *old_pen = m_pen;
 970   wxBrush *old_brush = m_brush;
 971
 972   wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 973   SetPen(& dottedPen);
 974   SetBrush( wxTRANSPARENT_BRUSH );
 975
 976   GetEventHandler()->OnDraw(dc);
 977
 978   if (old_pen) SetPen(old_pen);
 979   else SetPen(NULL);
 980   if (old_brush) SetBrush(old_brush);
 981   else SetBrush(NULL);
 982 }
 983
 984 bool wxLineShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
 985 {
 986   double x_offset = x - old_x;
 987   double y_offset = y - old_y;
 988
 989   if (m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
 990   {
 991     wxNode *node = m_lineControlPoints->First();
 992     while (node)
 993     {
 994       wxRealPoint *point = (wxRealPoint *)node->Data();
 995       point->x += x_offset;
 996       point->y += y_offset;
 997       node = node->Next();
 998     }
 999
1000   }
1001
1002   // Move temporary label rectangles if necessary
1003   for (int i = 0; i < 3; i++)
1004   {
1005     if (m_labelObjects[i])
1006     {
1007       m_labelObjects[i]->Erase(dc);
1008       double xp, yp, xr, yr;
1009       GetLabelPosition(i, &xp, &yp);
1010       wxNode *node = m_regions.Nth(i);
1011       if (node)
1012       {
1013         wxShapeRegion *region = (wxShapeRegion *)node->Data();
1014         region->GetPosition(&xr, &yr);
1015       }
1016       else
1017       {
1018         xr = 0.0; yr = 0.0;
1019       }
1020
1021       m_labelObjects[i]->Move(dc, xp+xr, yp+yr);
1022     }
1023   }
1024   return TRUE;
1025 }
1026
1027 void wxLineShape::OnMoveLink(wxDC& dc, bool moveControlPoints)
1028 {
1029   if (!m_from || !m_to)
1030    return;
1031
1032     if (m_lineControlPoints->Number() > 2)
1033       Initialise();
1034
1035     // Do each end - nothing in the middle. User has to move other points
1036     // manually if necessary.
1037     double end_x, end_y;
1038     double other_end_x, other_end_y;
1039
1040     FindLineEndPoints(&end_x, &end_y, &other_end_x, &other_end_y);
1041
1042     wxNode *first = m_lineControlPoints->First();
1043     wxRealPoint *first_point = (wxRealPoint *)first->Data();
1044     wxNode *last = m_lineControlPoints->Last();
1045     wxRealPoint *last_point = (wxRealPoint *)last->Data();
1046
1047 /* This is redundant, surely? Done by SetEnds.
1048     first_point->x = end_x; first_point->y = end_y;
1049     last_point->x = other_end_x; last_point->y = other_end_y;
1050 */
1051
1052     double oldX = m_xpos;
1053     double oldY = m_ypos;
1054
1055     SetEnds(end_x, end_y, other_end_x, other_end_y);
1056
1057     // Do a second time, because one may depend on the other.
1058     FindLineEndPoints(&end_x, &end_y, &other_end_x, &other_end_y);
1059     SetEnds(end_x, end_y, other_end_x, other_end_y);
1060
1061     // Try to move control points with the arc
1062     double x_offset = m_xpos - oldX;
1063     double y_offset = m_ypos - oldY;
1064
1065 //    if (moveControlPoints && m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
1066     // Only move control points if it's a self link. And only works if attachment mode is ON.
1067     if ((m_from == m_to) && (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE) && moveControlPoints && m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
1068     {
1069       wxNode *node = m_lineControlPoints->First();
1070       while (node)
1071       {
1072         if ((node != m_lineControlPoints->First()) && (node != m_lineControlPoints->Last()))
1073         {
1074           wxRealPoint *point = (wxRealPoint *)node->Data();
1075           point->x += x_offset;
1076           point->y += y_offset;
1077         }
1078         node = node->Next();
1079       }
1080     }
1081
1082     Move(dc, m_xpos, m_ypos);
1083 }
1084
1085 // Finds the x, y points at the two ends of the line.
1086 // This function can be used by e.g. line-routing routines to
1087 // get the actual points on the two node images where the lines will be drawn
1088 // to/from.
1089 void wxLineShape::FindLineEndPoints(double *fromX, double *fromY, double *toX, double *toY)
1090 {
1091   if (!m_from || !m_to)
1092    return;
1093
1094   // Do each end - nothing in the middle. User has to move other points
1095   // manually if necessary.
1096   double end_x, end_y;
1097   double other_end_x, other_end_y;
1098
1099   wxNode *first = m_lineControlPoints->First();
1100   wxRealPoint *first_point = (wxRealPoint *)first->Data();
1101   wxNode *last = m_lineControlPoints->Last();
1102   wxRealPoint *last_point = (wxRealPoint *)last->Data();
1103
1104   wxNode *second = first->Next();
1105   wxRealPoint *second_point = (wxRealPoint *)second->Data();
1106
1107   wxNode *second_last = last->Previous();
1108   wxRealPoint *second_last_point = (wxRealPoint *)second_last->Data();
1109
1110   if (m_lineControlPoints->Number() > 2)
1111   {
1112     if (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1113     {
1114       int nth, no_arcs;
1115       FindNth(m_from, &nth, &no_arcs, FALSE); // Not incoming
1116       m_from->GetAttachmentPosition(m_attachmentFrom, &end_x, &end_y, nth, no_arcs, this);
1117     }
1118     else
1119       (void) m_from->GetPerimeterPoint(m_from->GetX(), m_from->GetY(),
1120                                    (double)second_point->x, (double)second_point->y,
1121                                     &end_x, &end_y);
1122
1123     if (m_to->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1124     {
1125       int nth, no_arcs;
1126       FindNth(m_to, &nth, &no_arcs, TRUE); // Incoming
1127       m_to->GetAttachmentPosition(m_attachmentTo, &other_end_x, &other_end_y, nth, no_arcs, this);
1128     }
1129     else
1130       (void) m_to->GetPerimeterPoint(m_to->GetX(), m_to->GetY(),
1131                                 (double)second_last_point->x, (double)second_last_point->y,
1132                                 &other_end_x, &other_end_y);
1133   }
1134   else
1135   {
1136     double fromX = m_from->GetX();
1137     double fromY = m_from->GetY();
1138     double toX = m_to->GetX();
1139     double toY = m_to->GetY();
1140
1141     if (m_from->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1142     {
1143       int nth, no_arcs;
1144       FindNth(m_from, &nth, &no_arcs, FALSE);
1145       m_from->GetAttachmentPosition(m_attachmentFrom, &end_x, &end_y, nth, no_arcs, this);
1146       fromX = end_x;
1147       fromY = end_y;
1148     }
1149
1150     if (m_to->GetAttachmentMode() != ATTACHMENT_MODE_NONE)
1151     {
1152       int nth, no_arcs;
1153       FindNth(m_to, &nth, &no_arcs, TRUE);
1154       m_to->GetAttachmentPosition(m_attachmentTo, &other_end_x, &other_end_y, nth, no_arcs, this);
1155       toX = other_end_x;
1156       toY = other_end_y;
1157     }
1158
1159     if (m_from->GetAttachmentMode() == ATTACHMENT_MODE_NONE)
1160       (void) m_from->GetPerimeterPoint(m_from->GetX(), m_from->GetY(),
1161                                   toX, toY,
1162                                   &end_x, &end_y);
1163
1164     if (m_to->GetAttachmentMode() == ATTACHMENT_MODE_NONE)
1165       (void) m_to->GetPerimeterPoint(m_to->GetX(), m_to->GetY(),
1166                                 fromX, fromY,
1167                                 &other_end_x, &other_end_y);
1168   }
1169   *fromX = end_x;
1170   *fromY = end_y;
1171   *toX = other_end_x;
1172   *toY = other_end_y;
1173 }
1174
1175 void wxLineShape::OnDraw(wxDC& dc)
1176 {
1177   if (m_lineControlPoints)
1178   {
1179     if (m_pen)
1180       dc.SetPen(m_pen);
1181     if (m_brush)
1182       dc.SetBrush(m_brush);
1183
1184     int n = m_lineControlPoints->Number();
1185     wxPoint *points = new wxPoint[n];
1186     int i;
1187     for (i = 0; i < n; i++)
1188     {
1189         wxRealPoint* point = (wxRealPoint*) m_lineControlPoints->Nth(i)->Data();
1190         points[i].x = WXROUND(point->x);
1191         points[i].y = WXROUND(point->y);
1192     }
1193
1194     if (m_isSpline)
1195       dc.DrawSpline(n, points);
1196     else
1197       dc.DrawLines(n, points);
1198
1199 #ifdef __WXMSW__
1200     // For some reason, last point isn't drawn under Windows.
1201     dc.DrawPoint(points[n-1]);
1202 #endif
1203
1204     delete[] points;
1205
1206
1207     // Problem with pen - if not a solid pen, does strange things
1208     // to the arrowhead. So make (get) a new pen that's solid.
1209     if (m_pen && (m_pen->GetStyle() != wxSOLID))
1210     {
1211       wxPen *solid_pen =
1212         wxThePenList->FindOrCreatePen(m_pen->GetColour(), 1, wxSOLID);
1213       if (solid_pen)
1214         dc.SetPen(solid_pen);
1215     }
1216     DrawArrows(dc);
1217   }
1218 }
1219
1220 void wxLineShape::OnDrawControlPoints(wxDC& dc)
1221 {
1222   if (!m_drawHandles)
1223     return;
1224
1225   // Draw temporary label rectangles if necessary
1226   for (int i = 0; i < 3; i++)
1227   {
1228     if (m_labelObjects[i])
1229       m_labelObjects[i]->Draw(dc);
1230   }
1231   wxShape::OnDrawControlPoints(dc);
1232 }
1233
1234 void wxLineShape::OnEraseControlPoints(wxDC& dc)
1235 {
1236   // Erase temporary label rectangles if necessary
1237   for (int i = 0; i < 3; i++)
1238   {
1239     if (m_labelObjects[i])
1240       m_labelObjects[i]->Erase(dc);
1241   }
1242   wxShape::OnEraseControlPoints(dc);
1243 }
1244
1245 void wxLineShape::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
1246 {
1247 }
1248
1249 void wxLineShape::OnBeginDragLeft(double x, double y, int keys, int attachment)
1250 {
1251 }
1252
1253 void wxLineShape::OnEndDragLeft(double x, double y, int keys, int attachment)
1254 {
1255 }
1256
1257 /*
1258 void wxLineShape::SetArrowSize(double length, double width)
1259 {
1260   arrow_length = length;
1261   arrow_width = width;
1262 }
1263
1264 void wxLineShape::SetStartArrow(int style)
1265 {
1266   start_style = style;
1267 }
1268
1269 void wxLineShape::SetMiddleArrow(int style)
1270 {
1271   middle_style = style;
1272 }
1273
1274 void wxLineShape::SetEndArrow(int style)
1275 {
1276   end_style = style;
1277 }
1278 */
1279
1280 void wxLineShape::OnDrawContents(wxDC& dc)
1281 {
1282   if (GetDisableLabel())
1283     return;
1284
1285   for (int i = 0; i < 3; i++)
1286   {
1287     wxNode *node = m_regions.Nth(i);
1288     if (node)
1289     {
1290       wxShapeRegion *region = (wxShapeRegion *)node->Data();
1291       double x, y;
1292       GetLabelPosition(i, &x, &y);
1293       DrawRegion(dc, region, x, y);
1294     }
1295   }
1296 }
1297
1298 void wxLineShape::SetTo(wxShape *object)
1299 {
1300   m_to = object;
1301 }
1302
1303 void wxLineShape::SetFrom(wxShape *object)
1304 {
1305   m_from = object;
1306 }
1307
1308 void wxLineShape::MakeControlPoints()
1309 {
1310   if (m_canvas && m_lineControlPoints)
1311   {
1312     wxNode *first = m_lineControlPoints->First();
1313     wxNode *last = m_lineControlPoints->Last();
1314     wxRealPoint *first_point = (wxRealPoint *)first->Data();
1315     wxRealPoint *last_point = (wxRealPoint *)last->Data();
1316
1317     wxLineControlPoint *control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1318                                                first_point->x, first_point->y,
1319                                                CONTROL_POINT_ENDPOINT_FROM);
1320     control->m_point = first_point;
1321     m_canvas->AddShape(control);
1322     m_controlPoints.Append(control);
1323
1324
1325     wxNode *node = first->Next();
1326     while (node != last)
1327     {
1328       wxRealPoint *point = (wxRealPoint *)node->Data();
1329
1330       control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1331                                                point->x, point->y,
1332                                                CONTROL_POINT_LINE);
1333       control->m_point = point;
1334
1335       m_canvas->AddShape(control);
1336       m_controlPoints.Append(control);
1337
1338       node = node->Next();
1339     }
1340     control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1341                                                last_point->x, last_point->y,
1342                                                CONTROL_POINT_ENDPOINT_TO);
1343     control->m_point = last_point;
1344     m_canvas->AddShape(control);
1345     m_controlPoints.Append(control);
1346
1347   }
1348
1349 }
1350
1351 void wxLineShape::ResetControlPoints()
1352 {
1353   if (m_canvas && m_lineControlPoints && m_controlPoints.Number() > 0)
1354   {
1355     wxNode *node = m_controlPoints.First();
1356     wxNode *control_node = m_lineControlPoints->First();
1357     while (node && control_node)
1358     {
1359       wxRealPoint *point = (wxRealPoint *)control_node->Data();
1360       wxLineControlPoint *control = (wxLineControlPoint *)node->Data();
1361       control->SetX(point->x);
1362       control->SetY(point->y);
1363
1364       node = node->Next();
1365       control_node = control_node->Next();
1366     }
1367   }
1368 }
1369
1370 #ifdef PROLOGIO
1371 void wxLineShape::WriteAttributes(wxExpr *clause)
1372 {
1373   wxShape::WriteAttributes(clause);
1374
1375   if (m_from)
1376     clause->AddAttributeValue("from", m_from->GetId());
1377   if (m_to)
1378     clause->AddAttributeValue("to", m_to->GetId());
1379
1380   if (m_attachmentTo != 0)
1381     clause->AddAttributeValue("attachment_to", (long)m_attachmentTo);
1382   if (m_attachmentFrom != 0)
1383     clause->AddAttributeValue("attachment_from", (long)m_attachmentFrom);
1384
1385   if (m_alignmentStart != 0)
1386     clause->AddAttributeValue("align_start", (long)m_alignmentStart);
1387   if (m_alignmentEnd != 0)
1388     clause->AddAttributeValue("align_end", (long)m_alignmentEnd);
1389
1390   clause->AddAttributeValue("is_spline", (long)m_isSpline);
1391   if (m_maintainStraightLines)
1392     clause->AddAttributeValue("keep_lines_straight", (long)m_maintainStraightLines);
1393
1394   // Make a list of lists for the (sp)line controls
1395   wxExpr *list = new wxExpr(wxExprList);
1396   wxNode *node = m_lineControlPoints->First();
1397   while (node)
1398   {
1399     wxRealPoint *point = (wxRealPoint *)node->Data();
1400     wxExpr *point_list = new wxExpr(wxExprList);
1401     wxExpr *x_expr = new wxExpr((double) point->x);
1402     wxExpr *y_expr = new wxExpr((double) point->y);
1403     point_list->Append(x_expr);
1404     point_list->Append(y_expr);
1405     list->Append(point_list);
1406
1407     node = node->Next();
1408   }
1409   clause->AddAttributeValue("controls", list);
1410
1411   // Write arc arrows in new OGL format, if there are any.
1412   // This is a list of lists. Each sublist comprises:
1413   // (arrowType arrowEnd xOffset arrowSize)
1414   if (m_arcArrows.Number() > 0)
1415   {
1416     wxExpr *arrow_list = new wxExpr(wxExprList);
1417     node = m_arcArrows.First();
1418     while (node)
1419     {
1420       wxArrowHead *head = (wxArrowHead *)node->Data();
1421       wxExpr *head_list = new wxExpr(wxExprList);
1422       head_list->Append(new wxExpr((long)head->_GetType()));
1423       head_list->Append(new wxExpr((long)head->GetArrowEnd()));
1424       head_list->Append(new wxExpr(head->GetXOffset()));
1425       head_list->Append(new wxExpr(head->GetArrowSize()));
1426       head_list->Append(new wxExpr(wxExprString, head->GetName()));
1427       head_list->Append(new wxExpr(head->GetId()));
1428
1429       // New members of wxArrowHead
1430       head_list->Append(new wxExpr(head->GetYOffset()));
1431       head_list->Append(new wxExpr(head->GetSpacing()));
1432
1433       arrow_list->Append(head_list);
1434
1435       node = node->Next();
1436     }
1437     clause->AddAttributeValue("arrows", arrow_list);
1438   }
1439 }
1440
1441 void wxLineShape::ReadAttributes(wxExpr *clause)
1442 {
1443   wxShape::ReadAttributes(clause);
1444
1445   int iVal = (int) m_isSpline;
1446   clause->AssignAttributeValue("is_spline", &iVal);
1447   m_isSpline = (iVal != 0);
1448
1449   iVal = (int) m_maintainStraightLines;
1450   clause->AssignAttributeValue("keep_lines_straight", &iVal);
1451   m_maintainStraightLines = (iVal != 0);
1452
1453   clause->AssignAttributeValue("align_start", &m_alignmentStart);
1454   clause->AssignAttributeValue("align_end", &m_alignmentEnd);
1455
1456   // Compatibility: check for no regions.
1457   if (m_regions.Number() == 0)
1458   {
1459     wxShapeRegion *newRegion = new wxShapeRegion;
1460     newRegion->SetName("Middle");
1461     newRegion->SetSize(150, 50);
1462     m_regions.Append((wxObject *)newRegion);
1463     if (m_text.Number() > 0)
1464     {
1465       newRegion->ClearText();
1466       wxNode *node = m_text.First();
1467       while (node)
1468       {
1469         wxShapeTextLine *textLine = (wxShapeTextLine *)node->Data();
1470         wxNode *next = node->Next();
1471         newRegion->GetFormattedText().Append((wxObject *)textLine);
1472         delete node;
1473         node = next;
1474       }
1475     }
1476
1477     newRegion = new wxShapeRegion;
1478     newRegion->SetName("Start");
1479     newRegion->SetSize(150, 50);
1480     m_regions.Append((wxObject *)newRegion);
1481
1482     newRegion = new wxShapeRegion;
1483     newRegion->SetName("End");
1484     newRegion->SetSize(150, 50);
1485     m_regions.Append((wxObject *)newRegion);
1486   }
1487
1488   m_attachmentTo = 0;
1489   m_attachmentFrom = 0;
1490
1491   clause->AssignAttributeValue("attachment_to", &m_attachmentTo);
1492   clause->AssignAttributeValue("attachment_from", &m_attachmentFrom);
1493
1494   wxExpr *line_list = NULL;
1495
1496   // When image is created, there are default control points. Override
1497   // them if there are some in the file.
1498   clause->AssignAttributeValue("controls", &line_list);
1499
1500   if (line_list)
1501   {
1502     // Read a list of lists for the spline controls
1503     if (m_lineControlPoints)
1504     {
1505       ClearPointList(*m_lineControlPoints);
1506     }
1507     else
1508       m_lineControlPoints = new wxList;
1509
1510     wxExpr *node = line_list->value.first;
1511
1512     while (node)
1513     {
1514       wxExpr *xexpr = node->value.first;
1515       double x = xexpr->RealValue();
1516
1517       wxExpr *yexpr = xexpr->next;
1518       double y = yexpr->RealValue();
1519
1520       wxRealPoint *point = new wxRealPoint(x, y);
1521       m_lineControlPoints->Append((wxObject*) point);
1522
1523       node = node->next;
1524     }
1525   }
1526
1527   // Read arrow list, for new OGL code
1528   wxExpr *arrow_list = NULL;
1529
1530   clause->AssignAttributeValue("arrows", &arrow_list);
1531   if (arrow_list)
1532   {
1533     wxExpr *node = arrow_list->value.first;
1534
1535     while (node)
1536     {
1537       WXTYPE arrowType = ARROW_ARROW;
1538       int arrowEnd = 0;
1539       double xOffset = 0.0;
1540       double arrowSize = 0.0;
1541       wxString arrowName("");
1542       long arrowId = -1;
1543
1544       wxExpr *type_expr = node->Nth(0);
1545       wxExpr *end_expr = node->Nth(1);
1546       wxExpr *dist_expr = node->Nth(2);
1547       wxExpr *size_expr = node->Nth(3);
1548       wxExpr *name_expr = node->Nth(4);
1549       wxExpr *id_expr = node->Nth(5);
1550
1551       // New members of wxArrowHead
1552       wxExpr *yOffsetExpr = node->Nth(6);
1553       wxExpr *spacingExpr = node->Nth(7);
1554
1555       if (type_expr)
1556         arrowType = (int)type_expr->IntegerValue();
1557       if (end_expr)
1558         arrowEnd = (int)end_expr->IntegerValue();
1559       if (dist_expr)
1560         xOffset = dist_expr->RealValue();
1561       if (size_expr)
1562         arrowSize = size_expr->RealValue();
1563       if (name_expr)
1564         arrowName = name_expr->StringValue();
1565       if (id_expr)
1566         arrowId = id_expr->IntegerValue();
1567
1568       if (arrowId == -1)
1569         arrowId = NewId();
1570       else
1571         RegisterId(arrowId);
1572
1573       wxArrowHead *arrowHead = AddArrow(arrowType, arrowEnd, arrowSize, xOffset, (char*) (const char*) arrowName, NULL, arrowId);
1574       if (yOffsetExpr)
1575         arrowHead->SetYOffset(yOffsetExpr->RealValue());
1576       if (spacingExpr)
1577         arrowHead->SetSpacing(spacingExpr->RealValue());
1578
1579       node = node->next;
1580     }
1581   }
1582 }
1583 #endif
1584
1585 void wxLineShape::Copy(wxShape& copy)
1586 {
1587   wxShape::Copy(copy);
1588
1589   wxASSERT( copy.IsKindOf(CLASSINFO(wxLineShape)) );
1590
1591   wxLineShape& lineCopy = (wxLineShape&) copy;
1592
1593   lineCopy.m_to = m_to;
1594   lineCopy.m_from = m_from;
1595   lineCopy.m_attachmentTo = m_attachmentTo;
1596   lineCopy.m_attachmentFrom = m_attachmentFrom;
1597   lineCopy.m_isSpline = m_isSpline;
1598   lineCopy.m_alignmentStart = m_alignmentStart;
1599   lineCopy.m_alignmentEnd = m_alignmentEnd;
1600   lineCopy.m_maintainStraightLines = m_maintainStraightLines;
1601   lineCopy.m_lineOrientations.Clear();
1602
1603   wxNode *node = m_lineOrientations.First();
1604   while (node)
1605   {
1606     lineCopy.m_lineOrientations.Append(node->Data());
1607     node = node->Next();
1608   }
1609
1610   if (lineCopy.m_lineControlPoints)
1611   {
1612     ClearPointList(*lineCopy.m_lineControlPoints);
1613     delete lineCopy.m_lineControlPoints;
1614   }
1615
1616   lineCopy.m_lineControlPoints = new wxList;
1617
1618   node = m_lineControlPoints->First();
1619   while (node)
1620   {
1621     wxRealPoint *point = (wxRealPoint *)node->Data();
1622     wxRealPoint *new_point = new wxRealPoint(point->x, point->y);
1623     lineCopy.m_lineControlPoints->Append((wxObject*) new_point);
1624     node = node->Next();
1625   }
1626
1627   // Copy arrows
1628   lineCopy.ClearArrowsAtPosition(-1);
1629   node = m_arcArrows.First();
1630   while (node)
1631   {
1632     wxArrowHead *arrow = (wxArrowHead *)node->Data();
1633     lineCopy.m_arcArrows.Append(new wxArrowHead(*arrow));
1634     node = node->Next();
1635   }
1636 }
1637
1638 // Override select, to create/delete temporary label-moving objects
1639 void wxLineShape::Select(bool select, wxDC* dc)
1640 {
1641   wxShape::Select(select, dc);
1642   if (select)
1643   {
1644     for (int i = 0; i < 3; i++)
1645     {
1646       wxNode *node = m_regions.Nth(i);
1647       if (node)
1648       {
1649         wxShapeRegion *region = (wxShapeRegion *)node->Data();
1650         if (region->m_formattedText.Number() > 0)
1651         {
1652           double w, h, x, y, xx, yy;
1653           region->GetSize(&w, &h);
1654           region->GetPosition(&x, &y);
1655           GetLabelPosition(i, &xx, &yy);
1656           if (m_labelObjects[i])
1657           {
1658             m_labelObjects[i]->Select(FALSE);
1659             m_labelObjects[i]->RemoveFromCanvas(m_canvas);
1660             delete m_labelObjects[i];
1661           }
1662           m_labelObjects[i] = OnCreateLabelShape(this, region, w, h);
1663           m_labelObjects[i]->AddToCanvas(m_canvas);
1664           m_labelObjects[i]->Show(TRUE);
1665           if (dc)
1666             m_labelObjects[i]->Move(*dc, (double)(x + xx), (double)(y + yy));
1667           m_labelObjects[i]->Select(TRUE, dc);
1668         }
1669       }
1670     }
1671   }
1672   else
1673   {
1674     for (int i = 0; i < 3; i++)
1675     {
1676       if (m_labelObjects[i])
1677       {
1678         m_labelObjects[i]->Select(FALSE, dc);
1679         m_labelObjects[i]->Erase(*dc);
1680         m_labelObjects[i]->RemoveFromCanvas(m_canvas);
1681         delete m_labelObjects[i];
1682         m_labelObjects[i] = NULL;
1683       }
1684     }
1685   }
1686 }
1687
1688 /*
1689  * Line control point
1690  *
1691  */
1692
1693 IMPLEMENT_DYNAMIC_CLASS(wxLineControlPoint, wxControlPoint)
1694
1695 wxLineControlPoint::wxLineControlPoint(wxShapeCanvas *theCanvas, wxShape *object, double size, double x, double y, int the_type):
1696   wxControlPoint(theCanvas, object, size, x, y, the_type)
1697 {
1698   m_xpos = x;
1699   m_ypos = y;
1700   m_type = the_type;
1701   m_point = NULL;
1702 }
1703
1704 wxLineControlPoint::~wxLineControlPoint()
1705 {
1706 }
1707
1708 void wxLineControlPoint::OnDraw(wxDC& dc)
1709 {
1710   wxRectangleShape::OnDraw(dc);
1711 }
1712
1713 // Implement movement of Line point
1714 void wxLineControlPoint::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
1715 {
1716     m_shape->GetEventHandler()->OnSizingDragLeft(this, draw, x, y, keys, attachment);
1717 }
1718
1719 void wxLineControlPoint::OnBeginDragLeft(double x, double y, int keys, int attachment)
1720 {
1721     m_shape->GetEventHandler()->OnSizingBeginDragLeft(this, x, y, keys, attachment);
1722 }
1723
1724 void wxLineControlPoint::OnEndDragLeft(double x, double y, int keys, int attachment)
1725 {
1726     m_shape->GetEventHandler()->OnSizingEndDragLeft(this, x, y, keys, attachment);
1727 }
1728
1729 // Control points ('handles') redirect control to the actual shape, to make it easier
1730 // to override sizing behaviour.
1731 void wxLineShape::OnSizingDragLeft(wxControlPoint* pt, bool draw, double x, double y, int keys, int attachment)
1732 {
1733   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1734
1735   wxClientDC dc(GetCanvas());
1736   GetCanvas()->PrepareDC(dc);
1737
1738   dc.SetLogicalFunction(wxXOR);
1739
1740   wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1741   dc.SetPen(dottedPen);
1742   dc.SetBrush((* wxTRANSPARENT_BRUSH));
1743
1744   if (lpt->m_type == CONTROL_POINT_LINE)
1745   {
1746     m_canvas->Snap(&x, &y);
1747
1748     lpt->SetX(x); lpt->SetY(y);
1749     lpt->m_point->x = x; lpt->m_point->y = y;
1750
1751     wxLineShape *lineShape = (wxLineShape *)this;
1752
1753     wxPen *old_pen = lineShape->GetPen();
1754     wxBrush *old_brush = lineShape->GetBrush();
1755
1756     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1757     lineShape->SetPen(& dottedPen);
1758     lineShape->SetBrush(wxTRANSPARENT_BRUSH);
1759
1760     lineShape->GetEventHandler()->OnMoveLink(dc, FALSE);
1761
1762     lineShape->SetPen(old_pen);
1763     lineShape->SetBrush(old_brush);
1764   }
1765
1766   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM || lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1767   {
1768 //    lpt->SetX(x); lpt->SetY(y);
1769   }
1770
1771 }
1772
1773 void wxLineShape::OnSizingBeginDragLeft(wxControlPoint* pt, double x, double y, int keys, int attachment)
1774 {
1775   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1776
1777   wxClientDC dc(GetCanvas());
1778   GetCanvas()->PrepareDC(dc);
1779
1780   wxLineShape *lineShape = (wxLineShape *)this;
1781   if (lpt->m_type == CONTROL_POINT_LINE)
1782   {
1783     lpt->m_originalPos = * (lpt->m_point);
1784     m_canvas->Snap(&x, &y);
1785
1786     this->Erase(dc);
1787
1788     // Redraw start and end objects because we've left holes
1789     // when erasing the line
1790     lineShape->GetFrom()->OnDraw(dc);
1791     lineShape->GetFrom()->OnDrawContents(dc);
1792     lineShape->GetTo()->OnDraw(dc);
1793     lineShape->GetTo()->OnDrawContents(dc);
1794
1795     this->SetDisableLabel(TRUE);
1796     dc.SetLogicalFunction(wxXOR);
1797
1798     lpt->m_xpos = x; lpt->m_ypos = y;
1799     lpt->m_point->x = x; lpt->m_point->y = y;
1800
1801     wxPen *old_pen = lineShape->GetPen();
1802     wxBrush *old_brush = lineShape->GetBrush();
1803
1804     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1805     lineShape->SetPen(& dottedPen);
1806     lineShape->SetBrush(wxTRANSPARENT_BRUSH);
1807
1808     lineShape->GetEventHandler()->OnMoveLink(dc, FALSE);
1809
1810     lineShape->SetPen(old_pen);
1811     lineShape->SetBrush(old_brush);
1812   }
1813
1814   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM || lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1815   {
1816     m_canvas->SetCursor(g_oglBullseyeCursor);
1817     lpt->m_oldCursor = wxSTANDARD_CURSOR;
1818   }
1819 }
1820
1821 void wxLineShape::OnSizingEndDragLeft(wxControlPoint* pt, double x, double y, int keys, int attachment)
1822 {
1823   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1824
1825   wxClientDC dc(GetCanvas());
1826   GetCanvas()->PrepareDC(dc);
1827
1828   this->SetDisableLabel(FALSE);
1829   wxLineShape *lineShape = (wxLineShape *)this;
1830
1831   if (lpt->m_type == CONTROL_POINT_LINE)
1832   {
1833     m_canvas->Snap(&x, &y);
1834
1835     wxRealPoint pt = wxRealPoint(x, y);
1836
1837     // Move the control point back to where it was;
1838     // MoveControlPoint will move it to the new position
1839     // if it decides it wants. We only moved the position
1840     // during user feedback so we could redraw the line
1841     // as it changed shape.
1842     lpt->m_xpos = lpt->m_originalPos.x; lpt->m_ypos = lpt->m_originalPos.y;
1843     lpt->m_point->x = lpt->m_originalPos.x; lpt->m_point->y = lpt->m_originalPos.y;
1844
1845     OnMoveMiddleControlPoint(dc, lpt, pt);
1846   }
1847   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM)
1848   {
1849     if (lpt->m_oldCursor)
1850       m_canvas->SetCursor(lpt->m_oldCursor);
1851
1852 //    this->Erase(dc);
1853
1854 //    lpt->m_xpos = x; lpt->m_ypos = y;
1855
1856     if (lineShape->GetFrom())
1857     {
1858       lineShape->GetFrom()->MoveLineToNewAttachment(dc, lineShape, x, y);
1859     }
1860   }
1861   if (lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1862   {
1863     if (lpt->m_oldCursor)
1864       m_canvas->SetCursor(lpt->m_oldCursor);
1865
1866 //    lpt->m_xpos = x; lpt->m_ypos = y;
1867
1868     if (lineShape->GetTo())
1869     {
1870       lineShape->GetTo()->MoveLineToNewAttachment(dc, lineShape, x, y);
1871     }
1872   }
1873
1874   // Needed?
1875 #if 0
1876   int i = 0;
1877   for (i = 0; i < lineShape->GetLineControlPoints()->Number(); i++)
1878     if (((wxRealPoint *)(lineShape->GetLineControlPoints()->Nth(i)->Data())) == lpt->m_point)
1879       break;
1880
1881   // N.B. in OnMoveControlPoint, an event handler in Hardy could have deselected
1882   // the line and therefore deleted 'this'. -> GPF, intermittently.
1883   // So assume at this point that we've been blown away.
1884
1885   lineShape->OnMoveControlPoint(i+1, x, y);
1886 #endif
1887 }
1888
1889 // This is called only when a non-end control point is moved.
1890 bool wxLineShape::OnMoveMiddleControlPoint(wxDC& dc, wxLineControlPoint* lpt, const wxRealPoint& pt)
1891 {
1892     lpt->m_xpos = pt.x; lpt->m_ypos = pt.y;
1893     lpt->m_point->x = pt.x; lpt->m_point->y = pt.y;
1894
1895     GetEventHandler()->OnMoveLink(dc);
1896
1897     return TRUE;
1898 }
1899
1900 // Implement movement of endpoint to a new attachment
1901 // OBSOLETE: done by dragging with the left button.
1902
1903 #if 0
1904 void wxLineControlPoint::OnDragRight(bool draw, double x, double y, int keys, int attachment)
1905 {
1906   if (m_type == CONTROL_POINT_ENDPOINT_FROM || m_type == CONTROL_POINT_ENDPOINT_TO)
1907   {
1908     m_xpos = x; m_ypos = y;
1909   }
1910 }
1911
1912 void wxLineControlPoint::OnBeginDragRight(double x, double y, int keys, int attachment)
1913 {
1914   wxClientDC dc(GetCanvas());
1915   GetCanvas()->PrepareDC(dc);
1916
1917   wxLineShape *lineShape = (wxLineShape *)m_shape;
1918   if (m_type == CONTROL_POINT_ENDPOINT_FROM || m_type == CONTROL_POINT_ENDPOINT_TO)
1919   {
1920     Erase(dc);
1921     lineShape->GetEventHandler()->OnDraw(dc);
1922     if (m_type == CONTROL_POINT_ENDPOINT_FROM)
1923     {
1924       lineShape->GetFrom()->GetEventHandler()->OnDraw(dc);
1925       lineShape->GetFrom()->GetEventHandler()->OnDrawContents(dc);
1926     }
1927     else
1928     {
1929       lineShape->GetTo()->GetEventHandler()->OnDraw(dc);
1930       lineShape->GetTo()->GetEventHandler()->OnDrawContents(dc);
1931     }
1932     m_canvas->SetCursor(g_oglBullseyeCursor);
1933     m_oldCursor = wxSTANDARD_CURSOR;
1934   }
1935 }
1936
1937 void wxLineControlPoint::OnEndDragRight(double x, double y, int keys, int attachment)
1938 {
1939   wxClientDC dc(GetCanvas());
1940   GetCanvas()->PrepareDC(dc);
1941
1942   wxLineShape *lineShape = (wxLineShape *)m_shape;
1943   if (m_type == CONTROL_POINT_ENDPOINT_FROM)
1944   {
1945     if (m_oldCursor)
1946       m_canvas->SetCursor(m_oldCursor);
1947
1948     m_xpos = x; m_ypos = y;
1949
1950     if (lineShape->GetFrom())
1951     {
1952       lineShape->GetFrom()->EraseLinks(dc);
1953
1954       int new_attachment;
1955       double distance;
1956
1957       if (lineShape->GetFrom()->HitTest(x, y, &new_attachment, &distance))
1958         lineShape->SetAttachments(new_attachment, lineShape->GetAttachmentTo());
1959
1960       lineShape->GetFrom()->MoveLinks(dc);
1961     }
1962   }
1963   if (m_type == CONTROL_POINT_ENDPOINT_TO)
1964   {
1965     if (m_oldCursor)
1966       m_canvas->SetCursor(m_oldCursor);
1967     m_shape->Erase(dc);
1968
1969     m_xpos = x; m_ypos = y;
1970
1971     if (lineShape->GetTo())
1972     {
1973       lineShape->GetTo()->EraseLinks(dc);
1974
1975       int new_attachment;
1976       double distance;
1977       if (lineShape->GetTo()->HitTest(x, y, &new_attachment, &distance))
1978         lineShape->SetAttachments(lineShape->GetAttachmentFrom(), new_attachment);
1979
1980       lineShape->GetTo()->MoveLinks(dc);
1981     }
1982   }
1983   int i = 0;
1984   for (i = 0; i < lineShape->GetLineControlPoints()->Number(); i++)
1985     if (((wxRealPoint *)(lineShape->GetLineControlPoints()->Nth(i)->Data())) == m_point)
1986       break;
1987   lineShape->OnMoveControlPoint(i+1, x, y);
1988   if (!m_canvas->GetQuickEditMode()) m_canvas->Redraw(dc);
1989 }
1990 #endif
1991
1992 /*
1993  * Get the point on the given line (x1, y1) (x2, y2)
1994  * distance 'length' along from the end,
1995  * returned values in x and y
1996  */
1997
1998 void GetPointOnLine(double x1, double y1, double x2, double y2,
1999                     double length, double *x, double *y)
2000 {
2001   double l = (double)sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1));
2002
2003   if (l < 0.01)
2004     l = (double) 0.01;
2005
2006   double i_bar = (x2 - x1)/l;
2007   double j_bar = (y2 - y1)/l;
2008
2009   *x = (- length*i_bar) + x2;
2010   *y = (- length*j_bar) + y2;
2011 }
2012
2013 wxArrowHead *wxLineShape::AddArrow(WXTYPE type, int end, double size, double xOffset,
2014     const wxString& name, wxPseudoMetaFile *mf, long arrowId)
2015 {
2016   wxArrowHead *arrow = new wxArrowHead(type, end, size, xOffset, name, mf, arrowId);
2017   m_arcArrows.Append(arrow);
2018   return arrow;
2019 }
2020
2021 /*
2022  * Add arrowhead at a particular position in the arrowhead list.
2023  */
2024 bool wxLineShape::AddArrowOrdered(wxArrowHead *arrow, wxList& referenceList, int end)
2025 {
2026   wxNode *refNode = referenceList.First();
2027   wxNode *currNode = m_arcArrows.First();
2028   wxString targetName(arrow->GetName());
2029   if (!refNode) return FALSE;
2030
2031   // First check whether we need to insert in front of list,
2032   // because this arrowhead is the first in the reference
2033   // list and should therefore be first in the current list.
2034   wxArrowHead *refArrow = (wxArrowHead *)refNode->Data();
2035   if (refArrow->GetName() == targetName)
2036   {
2037     m_arcArrows.Insert(arrow);
2038     return TRUE;
2039   }
2040
2041   while (refNode && currNode)
2042   {
2043     wxArrowHead *currArrow = (wxArrowHead *)currNode->Data();
2044     refArrow = (wxArrowHead *)refNode->Data();
2045
2046     // Matching: advance current arrow pointer
2047     if ((currArrow->GetArrowEnd() == end) &&
2048         (currArrow->GetName() == refArrow->GetName()))
2049     {
2050       currNode = currNode->Next(); // Could be NULL now
2051       if (currNode)
2052         currArrow = (wxArrowHead *)currNode->Data();
2053     }
2054
2055     // Check if we're at the correct position in the
2056     // reference list
2057     if (targetName == refArrow->GetName())
2058     {
2059       if (currNode)
2060         m_arcArrows.Insert(currNode, arrow);
2061       else
2062         m_arcArrows.Append(arrow);
2063       return TRUE;
2064     }
2065     refNode = refNode->Next();
2066   }
2067   m_arcArrows.Append(arrow);
2068   return TRUE;
2069 }
2070
2071 void wxLineShape::ClearArrowsAtPosition(int end)
2072 {
2073   wxNode *node = m_arcArrows.First();
2074   while (node)
2075   {
2076     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2077     wxNode *next = node->Next();
2078     switch (end)
2079     {
2080       case -1:
2081       {
2082         delete arrow;
2083         delete node;
2084         break;
2085       }
2086       case ARROW_POSITION_START:
2087       {
2088         if (arrow->GetArrowEnd() == ARROW_POSITION_START)
2089         {
2090           delete arrow;
2091           delete node;
2092         }
2093         break;
2094       }
2095       case ARROW_POSITION_END:
2096       {
2097         if (arrow->GetArrowEnd() == ARROW_POSITION_END)
2098         {
2099           delete arrow;
2100           delete node;
2101         }
2102         break;
2103       }
2104       case ARROW_POSITION_MIDDLE:
2105       {
2106         if (arrow->GetArrowEnd() == ARROW_POSITION_MIDDLE)
2107         {
2108           delete arrow;
2109           delete node;
2110         }
2111         break;
2112       }
2113     }
2114     node = next;
2115   }
2116 }
2117
2118 bool wxLineShape::ClearArrow(const wxString& name)
2119 {
2120   wxNode *node = m_arcArrows.First();
2121   while (node)
2122   {
2123     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2124     if (arrow->GetName() == name)
2125     {
2126       delete arrow;
2127       delete node;
2128       return TRUE;
2129     }
2130     node = node->Next();
2131   }
2132   return FALSE;
2133 }
2134
2135 /*
2136  * Finds an arrowhead at the given position (if -1, any position)
2137  *
2138  */
2139
2140 wxArrowHead *wxLineShape::FindArrowHead(int position, const wxString& name)
2141 {
2142   wxNode *node = m_arcArrows.First();
2143   while (node)
2144   {
2145     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2146     if (((position == -1) || (position == arrow->GetArrowEnd())) &&
2147         (arrow->GetName() == name))
2148       return arrow;
2149     node = node->Next();
2150   }
2151   return NULL;
2152 }
2153
2154 wxArrowHead *wxLineShape::FindArrowHead(long arrowId)
2155 {
2156   wxNode *node = m_arcArrows.First();
2157   while (node)
2158   {
2159     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2160     if (arrowId == arrow->GetId())
2161       return arrow;
2162     node = node->Next();
2163   }
2164   return NULL;
2165 }
2166
2167 /*
2168  * Deletes an arrowhead at the given position (if -1, any position)
2169  *
2170  */
2171
2172 bool wxLineShape::DeleteArrowHead(int position, const wxString& name)
2173 {
2174   wxNode *node = m_arcArrows.First();
2175   while (node)
2176   {
2177     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2178     if (((position == -1) || (position == arrow->GetArrowEnd())) &&
2179         (arrow->GetName() == name))
2180     {
2181       delete arrow;
2182       delete node;
2183       return TRUE;
2184     }
2185     node = node->Next();
2186   }
2187   return FALSE;
2188 }
2189
2190 // Overloaded DeleteArrowHead: pass arrowhead id.
2191 bool wxLineShape::DeleteArrowHead(long id)
2192 {
2193   wxNode *node = m_arcArrows.First();
2194   while (node)
2195   {
2196     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2197     if (arrow->GetId() == id)
2198     {
2199       delete arrow;
2200       delete node;
2201       return TRUE;
2202     }
2203     node = node->Next();
2204   }
2205   return FALSE;
2206 }
2207
2208 /*
2209  * Calculate the minimum width a line
2210  * occupies, for the purposes of drawing lines in tools.
2211  *
2212  */
2213
2214 double wxLineShape::FindMinimumWidth()
2215 {
2216   double minWidth = 0.0;
2217   wxNode *node = m_arcArrows.First();
2218   while (node)
2219   {
2220     wxArrowHead *arrowHead = (wxArrowHead *)node->Data();
2221     minWidth += arrowHead->GetSize();
2222     if (node->Next())
2223       minWidth += arrowHead->GetSpacing();
2224
2225     node = node->Next();
2226   }
2227   // We have ABSOLUTE minimum now. So
2228   // scale it to give it reasonable aesthetics
2229   // when drawing with line.
2230   if (minWidth > 0.0)
2231     minWidth = (double)(minWidth * 1.4);
2232   else
2233     minWidth = 20.0;
2234
2235   SetEnds(0.0, 0.0, minWidth, 0.0);
2236   Initialise();
2237
2238   return minWidth;
2239 }
2240
2241 // Find which position we're talking about at this (x, y).
2242 // Returns ARROW_POSITION_START, ARROW_POSITION_MIDDLE, ARROW_POSITION_END
2243 int wxLineShape::FindLinePosition(double x, double y)
2244 {
2245   double startX, startY, endX, endY;
2246   GetEnds(&startX, &startY, &endX, &endY);
2247
2248   // Find distances from centre, start and end. The smallest wins.
2249   double centreDistance = (double)(sqrt((x - m_xpos)*(x - m_xpos) + (y - m_ypos)*(y - m_ypos)));
2250   double startDistance = (double)(sqrt((x - startX)*(x - startX) + (y - startY)*(y - startY)));
2251   double endDistance = (double)(sqrt((x - endX)*(x - endX) + (y - endY)*(y - endY)));
2252
2253   if (centreDistance < startDistance && centreDistance < endDistance)
2254     return ARROW_POSITION_MIDDLE;
2255   else if (startDistance < endDistance)
2256     return ARROW_POSITION_START;
2257   else
2258     return ARROW_POSITION_END;
2259 }
2260
2261 // Set alignment flags
2262 void wxLineShape::SetAlignmentOrientation(bool isEnd, bool isHoriz)
2263 {
2264   if (isEnd)
2265   {
2266     if (isHoriz && ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) != LINE_ALIGNMENT_HORIZ))
2267       m_alignmentEnd |= LINE_ALIGNMENT_HORIZ;
2268     else if (!isHoriz && ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ))
2269       m_alignmentEnd -= LINE_ALIGNMENT_HORIZ;
2270   }
2271   else
2272   {
2273     if (isHoriz && ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) != LINE_ALIGNMENT_HORIZ))
2274       m_alignmentStart |= LINE_ALIGNMENT_HORIZ;
2275     else if (!isHoriz && ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ))
2276       m_alignmentStart -= LINE_ALIGNMENT_HORIZ;
2277   }
2278 }
2279
2280 void wxLineShape::SetAlignmentType(bool isEnd, int alignType)
2281 {
2282   if (isEnd)
2283   {
2284     if (alignType == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2285     {
2286       if ((m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE) != LINE_ALIGNMENT_TO_NEXT_HANDLE)
2287         m_alignmentEnd |= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2288     }
2289     else if ((m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE) == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2290       m_alignmentEnd -= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2291   }
2292   else
2293   {
2294     if (alignType == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2295     {
2296       if ((m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE) != LINE_ALIGNMENT_TO_NEXT_HANDLE)
2297         m_alignmentStart |= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2298     }
2299     else if ((m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE) == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2300       m_alignmentStart -= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2301   }
2302 }
2303
2304 bool wxLineShape::GetAlignmentOrientation(bool isEnd)
2305 {
2306   if (isEnd)
2307     return ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ);
2308   else
2309     return ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ);
2310 }
2311
2312 int wxLineShape::GetAlignmentType(bool isEnd)
2313 {
2314   if (isEnd)
2315     return (m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE);
2316   else
2317     return (m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE);
2318 }
2319
2320 wxRealPoint *wxLineShape::GetNextControlPoint(wxShape *nodeObject)
2321 {
2322   int n = m_lineControlPoints->Number();
2323   int nn = 0;
2324   if (m_to == nodeObject)
2325   {
2326     // Must be END of line, so we want (n - 1)th control point.
2327     // But indexing ends at n-1, so subtract 2.
2328     nn = n - 2;
2329   }
2330   else nn = 1;
2331   wxNode *node = m_lineControlPoints->Nth(nn);
2332   if (node)
2333   {
2334     return (wxRealPoint *)node->Data();
2335   }
2336   else
2337     return FALSE;
2338 }
2339
2340 /*
2341  * Arrowhead
2342  *
2343  */
2344
2345 IMPLEMENT_DYNAMIC_CLASS(wxArrowHead, wxObject)
2346
2347 wxArrowHead::wxArrowHead(WXTYPE type, int end, double size, double dist, const wxString& name,
2348                      wxPseudoMetaFile *mf, long arrowId)
2349 {
2350   m_arrowType = type; m_arrowEnd = end; m_arrowSize = size;
2351   m_xOffset = dist;
2352   m_yOffset = 0.0;
2353   m_spacing = 5.0;
2354
2355   m_arrowName = name;
2356   m_metaFile = mf;
2357   m_id = arrowId;
2358   if (m_id == -1)
2359     m_id = NewId();
2360 }
2361
2362 wxArrowHead::wxArrowHead(wxArrowHead& toCopy)
2363 {
2364   m_arrowType = toCopy.m_arrowType; m_arrowEnd = toCopy.GetArrowEnd();
2365   m_arrowSize = toCopy.m_arrowSize;
2366   m_xOffset = toCopy.m_xOffset;
2367   m_yOffset = toCopy.m_yOffset;
2368   m_spacing = toCopy.m_spacing;
2369   m_arrowName = toCopy.m_arrowName ;
2370   if (toCopy.m_metaFile)
2371     m_metaFile = new wxPseudoMetaFile(*(toCopy.m_metaFile));
2372   else
2373     m_metaFile = NULL;
2374   m_id = NewId();
2375 }
2376
2377 wxArrowHead::~wxArrowHead()
2378 {
2379   if (m_metaFile) delete m_metaFile;
2380 }
2381
2382 void wxArrowHead::SetSize(double size)
2383 {
2384   m_arrowSize = size;
2385   if ((m_arrowType == ARROW_METAFILE) && m_metaFile)
2386   {
2387     double oldWidth = m_metaFile->m_width;
2388     if (oldWidth == 0.0)
2389       return;
2390
2391     double scale = (double)(size/oldWidth);
2392     if (scale != 1.0)
2393       m_metaFile->Scale(scale, scale);
2394   }
2395 }
2396
2397 // Can override this to create a different class of label shape
2398 wxLabelShape* wxLineShape::OnCreateLabelShape(wxLineShape *parent, wxShapeRegion *region, double w, double h)
2399 {
2400     return new wxLabelShape(parent, region, w, h);
2401 }
2402
2403 /*
2404  * Label object
2405  *
2406  */
2407
2408 IMPLEMENT_DYNAMIC_CLASS(wxLabelShape, wxRectangleShape)
2409
2410 wxLabelShape::wxLabelShape(wxLineShape *parent, wxShapeRegion *region, double w, double h):wxRectangleShape(w, h)
2411 {
2412   m_lineShape = parent;
2413   m_shapeRegion = region;
2414   SetPen(wxThePenList->FindOrCreatePen(wxColour(0, 0, 0), 1, wxDOT));
2415 }
2416
2417 wxLabelShape::~wxLabelShape()
2418 {
2419 }
2420
2421 void wxLabelShape::OnDraw(wxDC& dc)
2422 {
2423   if (m_lineShape && !m_lineShape->GetDrawHandles())
2424     return;
2425
2426     double x1 = (double)(m_xpos - m_width/2.0);
2427     double y1 = (double)(m_ypos - m_height/2.0);
2428
2429     if (m_pen)
2430     {
2431       if (m_pen->GetWidth() == 0)
2432         dc.SetPen(g_oglTransparentPen);
2433       else
2434         dc.SetPen(m_pen);
2435     }
2436     dc.SetBrush(wxTRANSPARENT_BRUSH);
2437
2438     if (m_cornerRadius > 0.0)
2439       dc.DrawRoundedRectangle(WXROUND(x1), WXROUND(y1), WXROUND(m_width), WXROUND(m_height), m_cornerRadius);
2440     else
2441       dc.DrawRectangle(WXROUND(x1), WXROUND(y1), WXROUND(m_width), WXROUND(m_height));
2442 }
2443
2444 void wxLabelShape::OnDrawContents(wxDC& dc)
2445 {
2446 }
2447
2448 void wxLabelShape::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
2449 {
2450   wxRectangleShape::OnDragLeft(draw, x, y, keys, attachment);
2451 }
2452
2453 void wxLabelShape::OnBeginDragLeft(double x, double y, int keys, int attachment)
2454 {
2455   wxRectangleShape::OnBeginDragLeft(x, y, keys, attachment);
2456 }
2457
2458 void wxLabelShape::OnEndDragLeft(double x, double y, int keys, int attachment)
2459 {
2460   wxRectangleShape::OnEndDragLeft(x, y, keys, attachment);
2461 }
2462
2463 bool wxLabelShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
2464 {
2465     return m_lineShape->OnLabelMovePre(dc, this, x, y, old_x, old_y, display);
2466 }
2467
2468 bool wxLineShape::OnLabelMovePre(wxDC& dc, wxLabelShape* labelShape, double x, double y, double old_x, double old_y, bool display)
2469 {
2470   labelShape->m_shapeRegion->SetSize(labelShape->GetWidth(), labelShape->GetHeight());
2471
2472   // Find position in line's region list
2473   int i = 0;
2474   wxNode *node = GetRegions().First();
2475   while (node)
2476   {
2477     if (labelShape->m_shapeRegion == (wxShapeRegion *)node->Data())
2478       node = NULL;
2479     else
2480     {
2481       node = node->Next();
2482       i ++;
2483     }
2484   }
2485   double xx, yy;
2486   GetLabelPosition(i, &xx, &yy);
2487   // Set the region's offset, relative to the default position for
2488   // each region.
2489   labelShape->m_shapeRegion->SetPosition((double)(x - xx), (double)(y - yy));
2490
2491   labelShape->SetX(x);
2492   labelShape->SetY(y);
2493
2494   // Need to reformat to fit region.
2495   if (labelShape->m_shapeRegion->GetText())
2496   {
2497
2498     wxString s(labelShape->m_shapeRegion->GetText());
2499     labelShape->FormatText(dc, s, i);
2500     DrawRegion(dc, labelShape->m_shapeRegion, xx, yy);
2501   }
2502   return TRUE;
2503 }
2504
2505 // Divert left and right clicks to line object
2506 void wxLabelShape::OnLeftClick(double x, double y, int keys, int attachment)
2507 {
2508   m_lineShape->GetEventHandler()->OnLeftClick(x, y, keys, attachment);
2509 }
2510
2511 void wxLabelShape::OnRightClick(double x, double y, int keys, int attachment)
2512 {
2513   m_lineShape->GetEventHandler()->OnRightClick(x, y, keys, attachment);
2514 }
2515