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