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 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include <wx/wxprec.h>
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include <wx/wx.h>
  25 #endif
  26
  27 #ifdef PROLOGIO
  28 #include <wx/wxexpr.h>
  29 #endif
  30
  31 #if USE_IOSTREAMH
  32 #include <iostream.h>
  33 #else
  34 #include <iostream>
  35 #endif
  36
  37 #include <ctype.h>
  38 #include <math.h>
  39
  40 #include "basic.h"
  41 #include "basicp.h"
  42 #include "lines.h"
  43 #include "linesp.h"
  44 #include "drawn.h"
  45 #include "misc.h"
  46 #include "canvas.h"
  47
  48 // Line shape
  49 IMPLEMENT_DYNAMIC_CLASS(wxLineShape, wxShape)
  50
  51 wxLineShape::wxLineShape()
  52 {
  53   m_sensitivity = OP_CLICK_LEFT | OP_CLICK_RIGHT;
  54   m_draggable = FALSE;
  55   m_attachmentTo = 0;
  56   m_attachmentFrom = 0;
  57 /*
  58   m_actualTextWidth = 0.0;
  59   m_actualTextHeight = 0.0;
  60 */
  61   m_from = NULL;
  62   m_to = NULL;
  63   m_erasing = FALSE;
  64   m_arrowSpacing = 5.0; // For the moment, don't bother saving this to file.
  65   m_ignoreArrowOffsets = FALSE;
  66   m_isSpline = FALSE;
  67   m_maintainStraightLines = FALSE;
  68   m_alignmentStart = 0;
  69   m_alignmentEnd = 0;
  70
  71   m_lineControlPoints = NULL;
  72
  73   // Clear any existing regions (created in an earlier constructor)
  74   // and make the three line regions.
  75   ClearRegions();
  76   wxShapeRegion *newRegion = new wxShapeRegion;
  77   newRegion->SetName("Middle");
  78   newRegion->SetSize(150, 50);
  79   m_regions.Append((wxObject *)newRegion);
  80
  81   newRegion = new wxShapeRegion;
  82   newRegion->SetName("Start");
  83   newRegion->SetSize(150, 50);
  84   m_regions.Append((wxObject *)newRegion);
  85
  86   newRegion = new wxShapeRegion;
  87   newRegion->SetName("End");
  88   newRegion->SetSize(150, 50);
  89   m_regions.Append((wxObject *)newRegion);
  90
  91   for (int i = 0; i < 3; i++)
  92     m_labelObjects[i] = NULL;
  93 }
  94
  95 wxLineShape::~wxLineShape()
  96 {
  97   if (m_lineControlPoints)
  98   {
  99     ClearPointList(*m_lineControlPoints);
 100     delete m_lineControlPoints;
 101   }
 102   for (int i = 0; i < 3; i++)
 103   {
 104     if (m_labelObjects[i])
 105     {
 106       m_labelObjects[i]->Select(FALSE);
 107       m_labelObjects[i]->RemoveFromCanvas(m_canvas);
 108       delete m_labelObjects[i];
 109       m_labelObjects[i] = NULL;
 110     }
 111   }
 112   ClearArrowsAtPosition(-1);
 113 }
 114
 115 void wxLineShape::MakeLineControlPoints(int n)
 116 {
 117   if (m_lineControlPoints)
 118   {
 119     ClearPointList(*m_lineControlPoints);
 120     delete m_lineControlPoints;
 121   }
 122   m_lineControlPoints = new wxList;
 123
 124   int i = 0;
 125   for (i = 0; i < n; i++)
 126   {
 127     wxRealPoint *point = new wxRealPoint(-999, -999);
 128     m_lineControlPoints->Append((wxObject*) point);
 129   }
 130 }
 131
 132 wxNode *wxLineShape::InsertLineControlPoint(wxDC* dc)
 133 {
 134     if (dc)
 135         Erase(*dc);
 136
 137   wxNode *last = m_lineControlPoints->Last();
 138   wxNode *second_last = last->Previous();
 139   wxRealPoint *last_point = (wxRealPoint *)last->Data();
 140   wxRealPoint *second_last_point = (wxRealPoint *)second_last->Data();
 141
 142   // Choose a point half way between the last and penultimate points
 143   double line_x = ((last_point->x + second_last_point->x)/2);
 144   double line_y = ((last_point->y + second_last_point->y)/2);
 145
 146   wxRealPoint *point = new wxRealPoint(line_x, line_y);
 147   wxNode *node = m_lineControlPoints->Insert(last, (wxObject*) point);
 148   return node;
 149 }
 150
 151 bool wxLineShape::DeleteLineControlPoint()
 152 {
 153   if (m_lineControlPoints->Number() < 3)
 154     return FALSE;
 155
 156   wxNode *last = m_lineControlPoints->Last();
 157   wxNode *second_last = last->Previous();
 158
 159   wxRealPoint *second_last_point = (wxRealPoint *)second_last->Data();
 160   delete second_last_point;
 161   delete second_last;
 162
 163   return TRUE;
 164 }
 165
 166 void wxLineShape::Initialise()
 167 {
 168   if (m_lineControlPoints)
 169   {
 170     // Just move the first and last control points
 171     wxNode *first = m_lineControlPoints->First();
 172     wxRealPoint *first_point = (wxRealPoint *)first->Data();
 173
 174     wxNode *last = m_lineControlPoints->Last();
 175     wxRealPoint *last_point = (wxRealPoint *)last->Data();
 176
 177     // If any of the line points are at -999, we must
 178     // initialize them by placing them half way between the first
 179     // and the last.
 180     wxNode *node = first->Next();
 181     while (node)
 182     {
 183       wxRealPoint *point = (wxRealPoint *)node->Data();
 184       if (point->x == -999)
 185       {
 186         double x1, y1, x2, y2;
 187         if (first_point->x < last_point->x)
 188           { x1 = first_point->x; x2 = last_point->x; }
 189         else
 190           { x2 = first_point->x; x1 = last_point->x; }
 191
 192         if (first_point->y < last_point->y)
 193           { y1 = first_point->y; y2 = last_point->y; }
 194         else
 195           { y2 = first_point->y; y1 = last_point->y; }
 196
 197         point->x = ((x2 - x1)/2 + x1);
 198         point->y = ((y2 - y1)/2 + y1);
 199       }
 200       node = node->Next();
 201     }
 202   }
 203 }
 204
 205 // Format a text string according to the region size, adding
 206 // strings with positions to region text list
 207 void wxLineShape::FormatText(wxDC& dc, const wxString& s, int i)
 208 {
 209   double w, h;
 210   ClearText(i);
 211
 212   if (m_regions.Number() < 1)
 213     return;
 214   wxNode *node = m_regions.Nth(i);
 215   if (!node)
 216     return;
 217
 218   wxShapeRegion *region = (wxShapeRegion *)node->Data();
 219   region->SetText(s);
 220   dc.SetFont(region->GetFont());
 221
 222   region->GetSize(&w, &h);
 223   // Initialize the size if zero
 224   if (((w == 0) || (h == 0)) && (strlen(s) > 0))
 225   {
 226     w = 100; h = 50;
 227     region->SetSize(w, h);
 228   }
 229
 230   wxStringList *string_list = oglFormatText(dc, s, (w-5), (h-5), region->GetFormatMode());
 231   node = string_list->First();
 232   while (node)
 233   {
 234     char *s = (char *)node->Data();
 235     wxShapeTextLine *line = new wxShapeTextLine(0.0, 0.0, s);
 236     region->GetFormattedText().Append((wxObject *)line);
 237     node = node->Next();
 238   }
 239   delete string_list;
 240   double actualW = w;
 241   double actualH = h;
 242   if (region->GetFormatMode() & FORMAT_SIZE_TO_CONTENTS)
 243   {
 244     oglGetCentredTextExtent(dc, &(region->GetFormattedText()), m_xpos, m_ypos, w, h, &actualW, &actualH);
 245     if ((actualW != w ) || (actualH != h))
 246     {
 247       double xx, yy;
 248       GetLabelPosition(i, &xx, &yy);
 249       EraseRegion(dc, region, xx, yy);
 250       if (m_labelObjects[i])
 251       {
 252         m_labelObjects[i]->Select(FALSE, &dc);
 253         m_labelObjects[i]->Erase(dc);
 254         m_labelObjects[i]->SetSize(actualW, actualH);
 255       }
 256
 257       region->SetSize(actualW, actualH);
 258
 259       if (m_labelObjects[i])
 260       {
 261         m_labelObjects[i]->Select(TRUE, & dc);
 262         m_labelObjects[i]->Draw(dc);
 263       }
 264     }
 265   }
 266   oglCentreText(dc, &(region->GetFormattedText()), m_xpos, m_ypos, actualW, actualH, region->GetFormatMode());
 267   m_formatted = TRUE;
 268 }
 269
 270 void wxLineShape::DrawRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
 271 {
 272   if (GetDisableLabel())
 273     return;
 274
 275   double w, h;
 276   double xx, yy;
 277   region->GetSize(&w, &h);
 278
 279   // Get offset from x, y
 280   region->GetPosition(&xx, &yy);
 281
 282   double xp = xx + x;
 283   double yp = yy + y;
 284
 285   // First, clear a rectangle for the text IF there is any
 286   if (region->GetFormattedText().Number() > 0)
 287   {
 288       dc.SetPen(g_oglWhiteBackgroundPen);
 289       dc.SetBrush(g_oglWhiteBackgroundBrush);
 290
 291       // Now draw the text
 292       if (region->GetFont()) dc.SetFont(region->GetFont());
 293
 294       dc.DrawRectangle((double)(xp - w/2.0), (double)(yp - h/2.0), (double)w, (double)h);
 295
 296       if (m_pen) dc.SetPen(m_pen);
 297       dc.SetTextForeground(* region->GetActualColourObject());
 298
 299 #ifdef __WXMSW__
 300       dc.SetTextBackground(g_oglWhiteBackgroundBrush->GetColour());
 301 #endif
 302
 303       oglDrawFormattedText(dc, &(region->GetFormattedText()), xp, yp, w, h, region->GetFormatMode());
 304   }
 305 }
 306
 307 void wxLineShape::EraseRegion(wxDC& dc, wxShapeRegion *region, double x, double y)
 308 {
 309   if (GetDisableLabel())
 310     return;
 311
 312   double w, h;
 313   double xx, yy;
 314   region->GetSize(&w, &h);
 315
 316   // Get offset from x, y
 317   region->GetPosition(&xx, &yy);
 318
 319   double xp = xx + x;
 320   double yp = yy + y;
 321
 322   if (region->GetFormattedText().Number() > 0)
 323   {
 324       dc.SetPen(g_oglWhiteBackgroundPen);
 325       dc.SetBrush(g_oglWhiteBackgroundBrush);
 326
 327       dc.DrawRectangle((double)(xp - w/2.0), (double)(yp - h/2.0), (double)w, (double)h);
 328   }
 329 }
 330
 331 // Get the reference point for a label. Region x and y
 332 // are offsets from this.
 333 // position is 0, 1, 2
 334 void wxLineShape::GetLabelPosition(int position, double *x, double *y)
 335 {
 336   switch (position)
 337   {
 338     case 0:
 339     {
 340       // Want to take the middle section for the label
 341       int n = m_lineControlPoints->Number();
 342       int half_way = (int)(n/2);
 343
 344       // Find middle of this line
 345       wxNode *node = m_lineControlPoints->Nth(half_way - 1);
 346       wxRealPoint *point = (wxRealPoint *)node->Data();
 347       wxNode *next_node = node->Next();
 348       wxRealPoint *next_point = (wxRealPoint *)next_node->Data();
 349
 350       double dx = (next_point->x - point->x);
 351       double dy = (next_point->y - point->y);
 352       *x = (double)(point->x + dx/2.0);
 353       *y = (double)(point->y + dy/2.0);
 354       break;
 355     }
 356     case 1:
 357     {
 358       wxNode *node = m_lineControlPoints->First();
 359       *x = ((wxRealPoint *)node->Data())->x;
 360       *y = ((wxRealPoint *)node->Data())->y;
 361       break;
 362     }
 363     case 2:
 364     {
 365       wxNode *node = m_lineControlPoints->Last();
 366       *x = ((wxRealPoint *)node->Data())->x;
 367       *y = ((wxRealPoint *)node->Data())->y;
 368       break;
 369     }
 370     default:
 371       break;
 372   }
 373 }
 374
 375 /*
 376  * Find whether line is supposed to be vertical or horizontal and
 377  * make it so.
 378  *
 379  */
 380 void GraphicsStraightenLine(wxRealPoint *point1, wxRealPoint *point2)
 381 {
 382   double dx = point2->x - point1->x;
 383   double dy = point2->y - point1->y;
 384
 385   if (dx == 0.0)
 386     return;
 387   else if (fabs(dy/dx) > 1.0)
 388   {
 389     point2->x = point1->x;
 390   }
 391   else point2->y = point1->y;
 392 }
 393
 394 void wxLineShape::Straighten(wxDC *dc)
 395 {
 396   if (!m_lineControlPoints || m_lineControlPoints->Number() < 3)
 397     return;
 398
 399   if (dc)
 400     Erase(* dc);
 401
 402   wxNode *first_point_node = m_lineControlPoints->First();
 403   wxNode *last_point_node = m_lineControlPoints->Last();
 404   wxNode *second_last_point_node = last_point_node->Previous();
 405
 406   wxRealPoint *last_point = (wxRealPoint *)last_point_node->Data();
 407   wxRealPoint *second_last_point = (wxRealPoint *)second_last_point_node->Data();
 408
 409   GraphicsStraightenLine(last_point, second_last_point);
 410
 411   wxNode *node = first_point_node;
 412   while (node && (node != second_last_point_node))
 413   {
 414     wxRealPoint *point = (wxRealPoint *)node->Data();
 415     wxRealPoint *next_point = (wxRealPoint *)(node->Next()->Data());
 416
 417     GraphicsStraightenLine(point, next_point);
 418     node = node->Next();
 419   }
 420
 421   if (dc)
 422     Draw(* dc);
 423 }
 424
 425
 426 void wxLineShape::Unlink()
 427 {
 428   if (m_to)
 429     m_to->GetLines().DeleteObject(this);
 430   if (m_from)
 431     m_from->GetLines().DeleteObject(this);
 432   m_to = NULL;
 433   m_from = NULL;
 434 }
 435
 436 void wxLineShape::SetEnds(double x1, double y1, double x2, double y2)
 437 {
 438   // Find centre point
 439   wxNode *first_point_node = m_lineControlPoints->First();
 440   wxNode *last_point_node = m_lineControlPoints->Last();
 441   wxRealPoint *first_point = (wxRealPoint *)first_point_node->Data();
 442   wxRealPoint *last_point = (wxRealPoint *)last_point_node->Data();
 443
 444   first_point->x = x1;
 445   first_point->y = y1;
 446   last_point->x = x2;
 447   last_point->y = y2;
 448
 449   m_xpos = (double)((x1 + x2)/2.0);
 450   m_ypos = (double)((y1 + y2)/2.0);
 451 }
 452
 453 // Get absolute positions of ends
 454 void wxLineShape::GetEnds(double *x1, double *y1, double *x2, double *y2)
 455 {
 456   wxNode *first_point_node = m_lineControlPoints->First();
 457   wxNode *last_point_node = m_lineControlPoints->Last();
 458   wxRealPoint *first_point = (wxRealPoint *)first_point_node->Data();
 459   wxRealPoint *last_point = (wxRealPoint *)last_point_node->Data();
 460
 461   *x1 = first_point->x; *y1 = first_point->y;
 462   *x2 = last_point->x; *y2 = last_point->y;
 463 }
 464
 465 void wxLineShape::SetAttachments(int from_attach, int to_attach)
 466 {
 467   m_attachmentFrom = from_attach;
 468   m_attachmentTo = to_attach;
 469 }
 470
 471 bool wxLineShape::HitTest(double x, double y, int *attachment, double *distance)
 472 {
 473   if (!m_lineControlPoints)
 474     return FALSE;
 475
 476   // Look at label regions in case mouse is over a label
 477   bool inLabelRegion = FALSE;
 478   for (int i = 0; i < 3; i ++)
 479   {
 480     wxNode *regionNode = m_regions.Nth(i);
 481     if (regionNode)
 482     {
 483       wxShapeRegion *region = (wxShapeRegion *)regionNode->Data();
 484       if (region->m_formattedText.Number() > 0)
 485       {
 486         double xp, yp, cx, cy, cw, ch;
 487         GetLabelPosition(i, &xp, &yp);
 488         // Offset region from default label position
 489         region->GetPosition(&cx, &cy);
 490         region->GetSize(&cw, &ch);
 491         cx += xp;
 492         cy += yp;
 493         double rLeft = (double)(cx - (cw/2.0));
 494         double rTop = (double)(cy - (ch/2.0));
 495         double rRight = (double)(cx + (cw/2.0));
 496         double rBottom = (double)(cy + (ch/2.0));
 497         if (x > rLeft && x < rRight && y > rTop && y < rBottom)
 498         {
 499           inLabelRegion = TRUE;
 500           i = 3;
 501         }
 502       }
 503     }
 504   }
 505
 506   wxNode *node = m_lineControlPoints->First();
 507
 508   while (node && node->Next())
 509   {
 510     wxRealPoint *point1 = (wxRealPoint *)node->Data();
 511     wxRealPoint *point2 = (wxRealPoint *)node->Next()->Data();
 512
 513     // Allow for inaccurate mousing or vert/horiz lines
 514     int extra = 4;
 515     double left = wxMin(point1->x, point2->x) - extra;
 516     double right = wxMax(point1->x, point2->x) + extra;
 517
 518     double bottom = wxMin(point1->y, point2->y) - extra;
 519     double top = wxMax(point1->y, point2->y) + extra;
 520
 521     if ((x > left && x < right && y > bottom && y < top) || inLabelRegion)
 522     {
 523       // Work out distance from centre of line
 524       double centre_x = (double)(left + (right - left)/2.0);
 525       double centre_y = (double)(bottom + (top - bottom)/2.0);
 526
 527       *attachment = 0;
 528       *distance = (double)sqrt((centre_x - x)*(centre_x - x) + (centre_y - y)*(centre_y - y));
 529       return TRUE;
 530     }
 531
 532     node = node->Next();
 533   }
 534   return FALSE;
 535 }
 536
 537 void wxLineShape::DrawArrows(wxDC& dc)
 538 {
 539   // Distance along line of each arrow: space them out evenly.
 540   double startArrowPos = 0.0;
 541   double endArrowPos = 0.0;
 542   double middleArrowPos = 0.0;
 543
 544   wxNode *node = m_arcArrows.First();
 545   while (node)
 546   {
 547     wxArrowHead *arrow = (wxArrowHead *)node->Data();
 548     switch (arrow->GetArrowEnd())
 549     {
 550       case ARROW_POSITION_START:
 551       {
 552         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 553           // If specified, x offset is proportional to line length
 554           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 555         else
 556         {
 557           DrawArrow(dc, arrow, startArrowPos, FALSE);      // Absolute distance
 558           startArrowPos += arrow->GetSize() + arrow->GetSpacing();
 559         }
 560         break;
 561       }
 562       case ARROW_POSITION_END:
 563       {
 564         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 565           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 566         else
 567         {
 568           DrawArrow(dc, arrow, endArrowPos, FALSE);
 569           endArrowPos += arrow->GetSize() + arrow->GetSpacing();
 570         }
 571         break;
 572       }
 573       case ARROW_POSITION_MIDDLE:
 574       {
 575         arrow->SetXOffset(middleArrowPos);
 576         if ((arrow->GetXOffset() != 0.0) && !m_ignoreArrowOffsets)
 577           DrawArrow(dc, arrow, arrow->GetXOffset(), TRUE);
 578         else
 579         {
 580           DrawArrow(dc, arrow, middleArrowPos, FALSE);
 581           middleArrowPos += arrow->GetSize() + arrow->GetSpacing();
 582         }
 583         break;
 584       }
 585     }
 586     node = node->Next();
 587   }
 588 }
 589
 590 void wxLineShape::DrawArrow(wxDC& dc, wxArrowHead *arrow, double xOffset, bool proportionalOffset)
 591 {
 592   wxNode *first_line_node = m_lineControlPoints->First();
 593   wxRealPoint *first_line_point = (wxRealPoint *)first_line_node->Data();
 594   wxNode *second_line_node = first_line_node->Next();
 595   wxRealPoint *second_line_point = (wxRealPoint *)second_line_node->Data();
 596
 597   wxNode *last_line_node = m_lineControlPoints->Last();
 598   wxRealPoint *last_line_point = (wxRealPoint *)last_line_node->Data();
 599   wxNode *second_last_line_node = last_line_node->Previous();
 600   wxRealPoint *second_last_line_point = (wxRealPoint *)second_last_line_node->Data();
 601
 602   // Position where we want to start drawing
 603   double positionOnLineX, positionOnLineY;
 604
 605   // Position of start point of line, at the end of which we draw the arrow.
 606   double startPositionX, startPositionY;
 607
 608   switch (arrow->GetPosition())
 609   {
 610     case ARROW_POSITION_START:
 611     {
 612       // If we're using a proportional offset, calculate just where this will
 613       // be on the line.
 614       double realOffset = xOffset;
 615       if (proportionalOffset)
 616       {
 617         double totalLength =
 618           (double)sqrt((second_line_point->x - first_line_point->x)*(second_line_point->x - first_line_point->x) +
 619                       (second_line_point->y - first_line_point->y)*(second_line_point->y - first_line_point->y));
 620         realOffset = (double)(xOffset * totalLength);
 621       }
 622       GetPointOnLine(second_line_point->x, second_line_point->y,
 623                      first_line_point->x, first_line_point->y,
 624                      realOffset, &positionOnLineX, &positionOnLineY);
 625       startPositionX = second_line_point->x;
 626       startPositionY = second_line_point->y;
 627       break;
 628     }
 629     case ARROW_POSITION_END:
 630     {
 631       // If we're using a proportional offset, calculate just where this will
 632       // be on the line.
 633       double realOffset = xOffset;
 634       if (proportionalOffset)
 635       {
 636         double totalLength =
 637           (double)sqrt((second_last_line_point->x - last_line_point->x)*(second_last_line_point->x - last_line_point->x) +
 638                       (second_last_line_point->y - last_line_point->y)*(second_last_line_point->y - last_line_point->y));
 639         realOffset = (double)(xOffset * totalLength);
 640       }
 641       GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
 642                      last_line_point->x, last_line_point->y,
 643                      realOffset, &positionOnLineX, &positionOnLineY);
 644       startPositionX = second_last_line_point->x;
 645       startPositionY = second_last_line_point->y;
 646       break;
 647     }
 648     case ARROW_POSITION_MIDDLE:
 649     {
 650       // Choose a point half way between the last and penultimate points
 651       double x = ((last_line_point->x + second_last_line_point->x)/2);
 652       double y = ((last_line_point->y + second_last_line_point->y)/2);
 653
 654       // If we're using a proportional offset, calculate just where this will
 655       // be on the line.
 656       double realOffset = xOffset;
 657       if (proportionalOffset)
 658       {
 659         double totalLength =
 660           (double)sqrt((second_last_line_point->x - x)*(second_last_line_point->x - x) +
 661                       (second_last_line_point->y - y)*(second_last_line_point->y - y));
 662         realOffset = (double)(xOffset * totalLength);
 663       }
 664
 665       GetPointOnLine(second_last_line_point->x, second_last_line_point->y,
 666                      x, y, realOffset, &positionOnLineX, &positionOnLineY);
 667       startPositionX = second_last_line_point->x;
 668       startPositionY = second_last_line_point->y;
 669       break;
 670     }
 671   }
 672
 673   /*
 674    * Add yOffset to arrow, if any
 675    */
 676
 677   const double myPi = (double) 3.14159265;
 678   // The translation that the y offset may give
 679   double deltaX = 0.0;
 680   double deltaY = 0.0;
 681   if ((arrow->GetYOffset() != 0.0) && !m_ignoreArrowOffsets)
 682   {
 683     /*
 684                                  |(x4, y4)
 685                                  |d
 686                                  |
 687        (x1, y1)--------------(x3, y3)------------------(x2, y2)
 688        x4 = x3 - d * sin(theta)
 689        y4 = y3 + d * cos(theta)
 690
 691        Where theta = tan(-1) of (y3-y1)/(x3-x1)
 692      */
 693      double x1 = startPositionX;
 694      double y1 = startPositionY;
 695      double x3 = positionOnLineX;
 696      double y3 = positionOnLineY;
 697      double d = -arrow->GetYOffset(); // Negate so +offset is above line
 698
 699      double theta = 0.0;
 700      if (x3 == x1)
 701        theta = (double)(myPi/2.0);
 702      else
 703        theta = (double)atan((y3-y1)/(x3-x1));
 704
 705      double x4 = (double)(x3 - (d*sin(theta)));
 706      double y4 = (double)(y3 + (d*cos(theta)));
 707
 708      deltaX = x4 - positionOnLineX;
 709      deltaY = y4 - positionOnLineY;
 710   }
 711
 712   switch (arrow->_GetType())
 713   {
 714     case ARROW_ARROW:
 715     {
 716       double arrowLength = arrow->GetSize();
 717       double arrowWidth = (double)(arrowLength/3.0);
 718
 719       double tip_x, tip_y, side1_x, side1_y, side2_x, side2_y;
 720       oglGetArrowPoints(startPositionX+deltaX, startPositionY+deltaY,
 721                        positionOnLineX+deltaX, positionOnLineY+deltaY,
 722                        arrowLength, arrowWidth, &tip_x, &tip_y,
 723                        &side1_x, &side1_y, &side2_x, &side2_y);
 724
 725       wxPoint points[4];
 726       points[0].x = tip_x; points[0].y = tip_y;
 727       points[1].x = side1_x; points[1].y = side1_y;
 728       points[2].x = side2_x; points[2].y = side2_y;
 729       points[3].x = tip_x; points[3].y = tip_y;
 730
 731       dc.SetPen(m_pen);
 732       dc.SetBrush(m_brush);
 733       dc.DrawPolygon(4, points);
 734       break;
 735     }
 736     case ARROW_HOLLOW_CIRCLE:
 737     case ARROW_FILLED_CIRCLE:
 738     {
 739       // Find point on line of centre of circle, which is a radius away
 740       // from the end position
 741       double diameter = (double)(arrow->GetSize());
 742       double x, y;
 743       GetPointOnLine(startPositionX+deltaX, startPositionY+deltaY,
 744                    positionOnLineX+deltaX, positionOnLineY+deltaY,
 745                    (double)(diameter/2.0),
 746                    &x, &y);
 747
 748       // Convert ellipse centre to top-left coordinates
 749       double x1 = (double)(x - (diameter/2.0));
 750       double y1 = (double)(y - (diameter/2.0));
 751
 752       dc.SetPen(m_pen);
 753       if (arrow->_GetType() == ARROW_HOLLOW_CIRCLE)
 754         dc.SetBrush(g_oglWhiteBackgroundBrush);
 755       else
 756         dc.SetBrush(m_brush);
 757
 758       dc.DrawEllipse(x1, y1, diameter, diameter);
 759       break;
 760     }
 761     case ARROW_SINGLE_OBLIQUE:
 762     {
 763       break;
 764     }
 765     case ARROW_METAFILE:
 766     {
 767       if (arrow->GetMetaFile())
 768       {
 769         // Find point on line of centre of object, which is a half-width away
 770         // from the end position
 771         /*
 772          *                width
 773          * <-- start pos  <-----><-- positionOnLineX
 774          *                _____
 775          * --------------|  x  | <-- e.g. rectangular arrowhead
 776          *                -----
 777          */
 778         double x, y;
 779         GetPointOnLine(startPositionX, startPositionY,
 780                    positionOnLineX, positionOnLineY,
 781                    (double)(arrow->GetMetaFile()->m_width/2.0),
 782                    &x, &y);
 783
 784         // Calculate theta for rotating the metafile.
 785         /*
 786           |
 787           |     o(x2, y2)   'o' represents the arrowhead.
 788           |    /
 789           |   /
 790           |  /theta
 791           | /(x1, y1)
 792           |______________________
 793         */
 794         double theta = 0.0;
 795         double x1 = startPositionX;
 796         double y1 = startPositionY;
 797         double x2 = positionOnLineX;
 798         double y2 = positionOnLineY;
 799
 800         if ((x1 == x2) && (y1 == y2))
 801           theta = 0.0;
 802
 803         else if ((x1 == x2) && (y1 > y2))
 804           theta = (double)(3.0*myPi/2.0);
 805
 806         else if ((x1 == x2) && (y2 > y1))
 807           theta = (double)(myPi/2.0);
 808
 809         else if ((x2 > x1) && (y2 >= y1))
 810           theta = (double)atan((y2 - y1)/(x2 - x1));
 811
 812         else if (x2 < x1)
 813           theta = (double)(myPi + atan((y2 - y1)/(x2 - x1)));
 814
 815         else if ((x2 > x1) && (y2 < y1))
 816           theta = (double)(2*myPi + atan((y2 - y1)/(x2 - x1)));
 817
 818         else
 819         {
 820           wxFatalError("Unknown arrowhead rotation case in lines.cc");
 821         }
 822
 823         // Rotate about the centre of the object, then place
 824         // the object on the line.
 825         if (arrow->GetMetaFile()->GetRotateable())
 826           arrow->GetMetaFile()->Rotate(0.0, 0.0, theta);
 827
 828         if (m_erasing)
 829         {
 830           // If erasing, just draw a rectangle.
 831           double minX, minY, maxX, maxY;
 832           arrow->GetMetaFile()->GetBounds(&minX, &minY, &maxX, &maxY);
 833           // Make erasing rectangle slightly bigger or you get droppings.
 834           int extraPixels = 4;
 835           dc.DrawRectangle((double)(deltaX + x + minX - (extraPixels/2.0)), (double)(deltaY + y + minY - (extraPixels/2.0)),
 836                            (double)(maxX - minX + extraPixels), (double)(maxY - minY + extraPixels));
 837         }
 838         else
 839           arrow->GetMetaFile()->Draw(dc, x+deltaX, y+deltaY);
 840       }
 841       break;
 842     }
 843     default:
 844     {
 845     }
 846   }
 847 }
 848
 849 void wxLineShape::OnErase(wxDC& dc)
 850 {
 851     wxPen *old_pen = m_pen;
 852     wxBrush *old_brush = m_brush;
 853     SetPen(g_oglWhiteBackgroundPen);
 854     SetBrush(g_oglWhiteBackgroundBrush);
 855
 856     double bound_x, bound_y;
 857     GetBoundingBoxMax(&bound_x, &bound_y);
 858     if (m_font) dc.SetFont(m_font);
 859
 860     // Undraw text regions
 861     for (int i = 0; i < 3; i++)
 862     {
 863       wxNode *node = m_regions.Nth(i);
 864       if (node)
 865       {
 866         double x, y;
 867         wxShapeRegion *region = (wxShapeRegion *)node->Data();
 868         GetLabelPosition(i, &x, &y);
 869         EraseRegion(dc, region, x, y);
 870       }
 871     }
 872
 873     // Undraw line
 874     dc.SetPen(g_oglWhiteBackgroundPen);
 875     dc.SetBrush(g_oglWhiteBackgroundBrush);
 876
 877     // Drawing over the line only seems to work if the line has a thickness
 878     // of 1.
 879     if (old_pen && (old_pen->GetWidth() > 1))
 880     {
 881       dc.DrawRectangle((double)(m_xpos - (bound_x/2.0) - 2.0), (double)(m_ypos - (bound_y/2.0) - 2.0),
 882                         (double)(bound_x+4.0),  (double)(bound_y+4.0));
 883     }
 884     else
 885     {
 886       m_erasing = TRUE;
 887       GetEventHandler()->OnDraw(dc);
 888       GetEventHandler()->OnEraseControlPoints(dc);
 889       m_erasing = FALSE;
 890     }
 891
 892     if (old_pen) SetPen(old_pen);
 893     if (old_brush) SetBrush(old_brush);
 894 }
 895
 896 void wxLineShape::GetBoundingBoxMin(double *w, double *h)
 897 {
 898   double x1 = 10000;
 899   double y1 = 10000;
 900   double x2 = -10000;
 901   double y2 = -10000;
 902
 903   wxNode *node = m_lineControlPoints->First();
 904   while (node)
 905   {
 906     wxRealPoint *point = (wxRealPoint *)node->Data();
 907
 908     if (point->x < x1) x1 = point->x;
 909     if (point->y < y1) y1 = point->y;
 910     if (point->x > x2) x2 = point->x;
 911     if (point->y > y2) y2 = point->y;
 912
 913     node = node->Next();
 914   }
 915   *w = (double)(x2 - x1);
 916   *h = (double)(y2 - y1);
 917 }
 918
 919 /*
 920  * For a node image of interest, finds the position of this arc
 921  * amongst all the arcs which are attached to THIS SIDE of the node image,
 922  * and the number of same.
 923  */
 924 void wxLineShape::FindNth(wxShape *image, int *nth, int *no_arcs, bool incoming)
 925 {
 926   int n = -1;
 927   int num = 0;
 928   wxNode *node = image->GetLines().First();
 929   int this_attachment;
 930   if (image == m_to)
 931     this_attachment = m_attachmentTo;
 932   else
 933     this_attachment = m_attachmentFrom;
 934
 935   // Find number of lines going into/out of this particular attachment point
 936   while (node)
 937   {
 938     wxLineShape *line = (wxLineShape *)node->Data();
 939
 940     if (line->m_from == image)
 941     {
 942       // This is the nth line attached to 'image'
 943       if ((line == this) && !incoming)
 944         n = num;
 945
 946       // Increment num count if this is the same side (attachment number)
 947       if (line->m_attachmentFrom == this_attachment)
 948         num ++;
 949     }
 950
 951     if (line->m_to == image)
 952     {
 953       // This is the nth line attached to 'image'
 954       if ((line == this) && incoming)
 955         n = num;
 956
 957       // Increment num count if this is the same side (attachment number)
 958       if (line->m_attachmentTo == this_attachment)
 959         num ++;
 960     }
 961
 962     node = node->Next();
 963   }
 964   *nth = n;
 965   *no_arcs = num;
 966 }
 967
 968 void wxLineShape::OnDrawOutline(wxDC& dc, double x, double y, double w, double h)
 969 {
 970   wxPen *old_pen = m_pen;
 971   wxBrush *old_brush = m_brush;
 972
 973   wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
 974   SetPen(& dottedPen);
 975   SetBrush( wxTRANSPARENT_BRUSH );
 976
 977   GetEventHandler()->OnDraw(dc);
 978
 979   if (old_pen) SetPen(old_pen);
 980   else SetPen(NULL);
 981   if (old_brush) SetBrush(old_brush);
 982   else SetBrush(NULL);
 983 }
 984
 985 bool wxLineShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
 986 {
 987   double x_offset = x - old_x;
 988   double y_offset = y - old_y;
 989
 990   if (m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
 991   {
 992     wxNode *node = m_lineControlPoints->First();
 993     while (node)
 994     {
 995       wxRealPoint *point = (wxRealPoint *)node->Data();
 996       point->x += x_offset;
 997       point->y += y_offset;
 998       node = node->Next();
 999     }
1000
1001   }
1002
1003   // Move temporary label rectangles if necessary
1004   for (int i = 0; i < 3; i++)
1005   {
1006     if (m_labelObjects[i])
1007     {
1008       m_labelObjects[i]->Erase(dc);
1009       double xp, yp, xr, yr;
1010       GetLabelPosition(i, &xp, &yp);
1011       wxNode *node = m_regions.Nth(i);
1012       if (node)
1013       {
1014         wxShapeRegion *region = (wxShapeRegion *)node->Data();
1015         region->GetPosition(&xr, &yr);
1016       }
1017       else
1018       {
1019         xr = 0.0; yr = 0.0;
1020       }
1021
1022       m_labelObjects[i]->Move(dc, xp+xr, yp+yr);
1023     }
1024   }
1025   return TRUE;
1026 }
1027
1028 void wxLineShape::OnMoveLink(wxDC& dc, bool moveControlPoints)
1029 {
1030   if (!m_from || !m_to)
1031    return;
1032
1033     if (m_lineControlPoints->Number() > 2)
1034       Initialise();
1035
1036     // Do each end - nothing in the middle. User has to move other points
1037     // manually if necessary.
1038     double end_x, end_y;
1039     double other_end_x, other_end_y;
1040
1041     FindLineEndPoints(&end_x, &end_y, &other_end_x, &other_end_y);
1042
1043     wxNode *first = m_lineControlPoints->First();
1044     wxRealPoint *first_point = (wxRealPoint *)first->Data();
1045     wxNode *last = m_lineControlPoints->Last();
1046     wxRealPoint *last_point = (wxRealPoint *)last->Data();
1047
1048 /* This is redundant, surely? Done by SetEnds.
1049     first_point->x = end_x; first_point->y = end_y;
1050     last_point->x = other_end_x; last_point->y = other_end_y;
1051 */
1052
1053     double oldX = m_xpos;
1054     double oldY = m_ypos;
1055
1056     SetEnds(end_x, end_y, other_end_x, other_end_y);
1057
1058     // Do a second time, because one may depend on the other.
1059     FindLineEndPoints(&end_x, &end_y, &other_end_x, &other_end_y);
1060     SetEnds(end_x, end_y, other_end_x, other_end_y);
1061
1062     // Try to move control points with the arc
1063     double x_offset = m_xpos - oldX;
1064     double y_offset = m_ypos - oldY;
1065
1066 //    if (moveControlPoints && m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
1067     // Only move control points if it's a self link. And only works if attachment mode is ON.
1068     if ((m_from == m_to) && m_from->GetAttachmentMode() && moveControlPoints && m_lineControlPoints && !(x_offset == 0.0 && y_offset == 0.0))
1069     {
1070       wxNode *node = m_lineControlPoints->First();
1071       while (node)
1072       {
1073         if ((node != m_lineControlPoints->First()) && (node != m_lineControlPoints->Last()))
1074         {
1075           wxRealPoint *point = (wxRealPoint *)node->Data();
1076           point->x += x_offset;
1077           point->y += y_offset;
1078         }
1079         node = node->Next();
1080       }
1081     }
1082
1083     Move(dc, m_xpos, m_ypos);
1084 }
1085
1086 // Finds the x, y points at the two ends of the line.
1087 // This function can be used by e.g. line-routing routines to
1088 // get the actual points on the two node images where the lines will be drawn
1089 // to/from.
1090 void wxLineShape::FindLineEndPoints(double *fromX, double *fromY, double *toX, double *toY)
1091 {
1092   if (!m_from || !m_to)
1093    return;
1094
1095   // Do each end - nothing in the middle. User has to move other points
1096   // manually if necessary.
1097   double end_x, end_y;
1098   double other_end_x, other_end_y;
1099
1100   wxNode *first = m_lineControlPoints->First();
1101   wxRealPoint *first_point = (wxRealPoint *)first->Data();
1102   wxNode *last = m_lineControlPoints->Last();
1103   wxRealPoint *last_point = (wxRealPoint *)last->Data();
1104
1105   wxNode *second = first->Next();
1106   wxRealPoint *second_point = (wxRealPoint *)second->Data();
1107
1108   wxNode *second_last = last->Previous();
1109   wxRealPoint *second_last_point = (wxRealPoint *)second_last->Data();
1110
1111   if (m_lineControlPoints->Number() > 2)
1112   {
1113     if (m_from->GetAttachmentMode())
1114     {
1115       int nth, no_arcs;
1116       FindNth(m_from, &nth, &no_arcs, FALSE); // Not incoming
1117       m_from->GetAttachmentPosition(m_attachmentFrom, &end_x, &end_y, nth, no_arcs, this);
1118     }
1119     else
1120       (void) m_from->GetPerimeterPoint(m_from->GetX(), m_from->GetY(),
1121                                    (double)second_point->x, (double)second_point->y,
1122                                     &end_x, &end_y);
1123
1124     if (m_to->GetAttachmentMode())
1125     {
1126       int nth, no_arcs;
1127       FindNth(m_to, &nth, &no_arcs, TRUE); // Incoming
1128       m_to->GetAttachmentPosition(m_attachmentTo, &other_end_x, &other_end_y, nth, no_arcs, this);
1129     }
1130     else
1131       (void) m_to->GetPerimeterPoint(m_to->GetX(), m_to->GetY(),
1132                                 (double)second_last_point->x, (double)second_last_point->y,
1133                                 &other_end_x, &other_end_y);
1134   }
1135   else
1136   {
1137     double fromX = m_from->GetX();
1138     double fromY = m_from->GetY();
1139     double toX = m_to->GetX();
1140     double toY = m_to->GetY();
1141
1142     if (m_from->GetAttachmentMode())
1143     {
1144       int nth, no_arcs;
1145       FindNth(m_from, &nth, &no_arcs, FALSE);
1146       m_from->GetAttachmentPosition(m_attachmentFrom, &end_x, &end_y, nth, no_arcs, this);
1147       fromX = end_x;
1148       fromY = end_y;
1149     }
1150
1151     if (m_to->GetAttachmentMode())
1152     {
1153       int nth, no_arcs;
1154       FindNth(m_to, &nth, &no_arcs, TRUE);
1155       m_to->GetAttachmentPosition(m_attachmentTo, &other_end_x, &other_end_y, nth, no_arcs, this);
1156       toX = other_end_x;
1157       toY = other_end_y;
1158     }
1159
1160     if (!m_from->GetAttachmentMode())
1161       (void) m_from->GetPerimeterPoint(m_from->GetX(), m_from->GetY(),
1162                                   toX, toY,
1163                                   &end_x, &end_y);
1164
1165     if (!m_to->GetAttachmentMode())
1166       (void) m_to->GetPerimeterPoint(m_to->GetX(), m_to->GetY(),
1167                                 fromX, fromY,
1168                                 &other_end_x, &other_end_y);
1169   }
1170   *fromX = end_x;
1171   *fromY = end_y;
1172   *toX = other_end_x;
1173   *toY = other_end_y;
1174 }
1175
1176 void wxLineShape::OnDraw(wxDC& dc)
1177 {
1178   if (m_lineControlPoints)
1179   {
1180     if (m_pen)
1181       dc.SetPen(m_pen);
1182     if (m_brush)
1183       dc.SetBrush(m_brush);
1184
1185     int n = m_lineControlPoints->Number();
1186     wxPoint *points = new wxPoint[n];
1187     int i;
1188     for (i = 0; i < n; i++)
1189     {
1190         wxRealPoint* point = (wxRealPoint*) m_lineControlPoints->Nth(i)->Data();
1191         points[i].x = WXROUND(point->x);
1192         points[i].y = WXROUND(point->y);
1193     }
1194
1195     if (m_isSpline)
1196       dc.DrawSpline(n, points);
1197     else
1198       dc.DrawLines(n, points);
1199
1200 #ifdef __WXMSW__
1201     // For some reason, last point isn't drawn under Windows.
1202     dc.DrawPoint(points[n-1]);
1203 #endif
1204
1205     delete[] points;
1206
1207
1208     // Problem with pen - if not a solid pen, does strange things
1209     // to the arrowhead. So make (get) a new pen that's solid.
1210     if (m_pen && (m_pen->GetStyle() != wxSOLID))
1211     {
1212       wxPen *solid_pen =
1213         wxThePenList->FindOrCreatePen(m_pen->GetColour(), 1, wxSOLID);
1214       if (solid_pen)
1215         dc.SetPen(solid_pen);
1216     }
1217     DrawArrows(dc);
1218   }
1219 }
1220
1221 void wxLineShape::OnDrawControlPoints(wxDC& dc)
1222 {
1223   if (!m_drawHandles)
1224     return;
1225
1226   // Draw temporary label rectangles if necessary
1227   for (int i = 0; i < 3; i++)
1228   {
1229     if (m_labelObjects[i])
1230       m_labelObjects[i]->Draw(dc);
1231   }
1232   wxShape::OnDrawControlPoints(dc);
1233 }
1234
1235 void wxLineShape::OnEraseControlPoints(wxDC& dc)
1236 {
1237   // Erase temporary label rectangles if necessary
1238   for (int i = 0; i < 3; i++)
1239   {
1240     if (m_labelObjects[i])
1241       m_labelObjects[i]->Erase(dc);
1242   }
1243   wxShape::OnEraseControlPoints(dc);
1244 }
1245
1246 void wxLineShape::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
1247 {
1248 }
1249
1250 void wxLineShape::OnBeginDragLeft(double x, double y, int keys, int attachment)
1251 {
1252 }
1253
1254 void wxLineShape::OnEndDragLeft(double x, double y, int keys, int attachment)
1255 {
1256 }
1257
1258 /*
1259 void wxLineShape::SetArrowSize(double length, double width)
1260 {
1261   arrow_length = length;
1262   arrow_width = width;
1263 }
1264
1265 void wxLineShape::SetStartArrow(int style)
1266 {
1267   start_style = style;
1268 }
1269
1270 void wxLineShape::SetMiddleArrow(int style)
1271 {
1272   middle_style = style;
1273 }
1274
1275 void wxLineShape::SetEndArrow(int style)
1276 {
1277   end_style = style;
1278 }
1279 */
1280
1281 void wxLineShape::OnDrawContents(wxDC& dc)
1282 {
1283   if (GetDisableLabel())
1284     return;
1285
1286   for (int i = 0; i < 3; i++)
1287   {
1288     wxNode *node = m_regions.Nth(i);
1289     if (node)
1290     {
1291       wxShapeRegion *region = (wxShapeRegion *)node->Data();
1292       double x, y;
1293       GetLabelPosition(i, &x, &y);
1294       DrawRegion(dc, region, x, y);
1295     }
1296   }
1297 }
1298
1299 void wxLineShape::SetTo(wxShape *object)
1300 {
1301   m_to = object;
1302 }
1303
1304 void wxLineShape::SetFrom(wxShape *object)
1305 {
1306   m_from = object;
1307 }
1308
1309 void wxLineShape::MakeControlPoints()
1310 {
1311   if (m_canvas && m_lineControlPoints)
1312   {
1313     wxNode *first = m_lineControlPoints->First();
1314     wxNode *last = m_lineControlPoints->Last();
1315     wxRealPoint *first_point = (wxRealPoint *)first->Data();
1316     wxRealPoint *last_point = (wxRealPoint *)last->Data();
1317
1318     wxLineControlPoint *control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1319                                                first_point->x, first_point->y,
1320                                                CONTROL_POINT_ENDPOINT_FROM);
1321     control->m_point = first_point;
1322     m_canvas->AddShape(control);
1323     m_controlPoints.Append(control);
1324
1325
1326     wxNode *node = first->Next();
1327     while (node != last)
1328     {
1329       wxRealPoint *point = (wxRealPoint *)node->Data();
1330
1331       control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1332                                                point->x, point->y,
1333                                                CONTROL_POINT_LINE);
1334       control->m_point = point;
1335
1336       m_canvas->AddShape(control);
1337       m_controlPoints.Append(control);
1338
1339       node = node->Next();
1340     }
1341     control = new wxLineControlPoint(m_canvas, this, CONTROL_POINT_SIZE,
1342                                                last_point->x, last_point->y,
1343                                                CONTROL_POINT_ENDPOINT_TO);
1344     control->m_point = last_point;
1345     m_canvas->AddShape(control);
1346     m_controlPoints.Append(control);
1347
1348   }
1349
1350 }
1351
1352 void wxLineShape::ResetControlPoints()
1353 {
1354   if (m_canvas && m_lineControlPoints && m_controlPoints.Number() > 0)
1355   {
1356     wxNode *node = m_controlPoints.First();
1357     wxNode *control_node = m_lineControlPoints->First();
1358     while (node && control_node)
1359     {
1360       wxRealPoint *point = (wxRealPoint *)control_node->Data();
1361       wxLineControlPoint *control = (wxLineControlPoint *)node->Data();
1362       control->SetX(point->x);
1363       control->SetY(point->y);
1364
1365       node = node->Next();
1366       control_node = control_node->Next();
1367     }
1368   }
1369 }
1370
1371 #ifdef PROLOGIO
1372 void wxLineShape::WriteAttributes(wxExpr *clause)
1373 {
1374   wxShape::WriteAttributes(clause);
1375
1376   if (m_from)
1377     clause->AddAttributeValue("from", m_from->GetId());
1378   if (m_to)
1379     clause->AddAttributeValue("to", m_to->GetId());
1380
1381   if (m_attachmentTo != 0)
1382     clause->AddAttributeValue("attachment_to", (long)m_attachmentTo);
1383   if (m_attachmentFrom != 0)
1384     clause->AddAttributeValue("attachment_from", (long)m_attachmentFrom);
1385
1386   if (m_alignmentStart != 0)
1387     clause->AddAttributeValue("align_start", (long)m_alignmentStart);
1388   if (m_alignmentEnd != 0)
1389     clause->AddAttributeValue("align_end", (long)m_alignmentEnd);
1390
1391   clause->AddAttributeValue("is_spline", (long)m_isSpline);
1392   if (m_maintainStraightLines)
1393     clause->AddAttributeValue("keep_lines_straight", (long)m_maintainStraightLines);
1394
1395   // Make a list of lists for the (sp)line controls
1396   wxExpr *list = new wxExpr(PrologList);
1397   wxNode *node = m_lineControlPoints->First();
1398   while (node)
1399   {
1400     wxRealPoint *point = (wxRealPoint *)node->Data();
1401     wxExpr *point_list = new wxExpr(PrologList);
1402     wxExpr *x_expr = new wxExpr((double) point->x);
1403     wxExpr *y_expr = new wxExpr((double) point->y);
1404     point_list->Append(x_expr);
1405     point_list->Append(y_expr);
1406     list->Append(point_list);
1407
1408     node = node->Next();
1409   }
1410   clause->AddAttributeValue("controls", list);
1411
1412   // Write arc arrows in new OGL format, if there are any.
1413   // This is a list of lists. Each sublist comprises:
1414   // (arrowType arrowEnd xOffset arrowSize)
1415   if (m_arcArrows.Number() > 0)
1416   {
1417     wxExpr *arrow_list = new wxExpr(PrologList);
1418     node = m_arcArrows.First();
1419     while (node)
1420     {
1421       wxArrowHead *head = (wxArrowHead *)node->Data();
1422       wxExpr *head_list = new wxExpr(PrologList);
1423       head_list->Append(new wxExpr((long)head->_GetType()));
1424       head_list->Append(new wxExpr((long)head->GetArrowEnd()));
1425       head_list->Append(new wxExpr(head->GetXOffset()));
1426       head_list->Append(new wxExpr(head->GetArrowSize()));
1427       head_list->Append(new wxExpr(PrologString, (head->GetName() ? head->GetName() : "")));
1428       head_list->Append(new wxExpr(head->GetId()));
1429
1430       // New members of wxArrowHead
1431       head_list->Append(new wxExpr(head->GetYOffset()));
1432       head_list->Append(new wxExpr(head->GetSpacing()));
1433
1434       arrow_list->Append(head_list);
1435
1436       node = node->Next();
1437     }
1438     clause->AddAttributeValue("arrows", arrow_list);
1439   }
1440 }
1441
1442 void wxLineShape::ReadAttributes(wxExpr *clause)
1443 {
1444   wxShape::ReadAttributes(clause);
1445
1446   int iVal = (int) m_isSpline;
1447   clause->AssignAttributeValue("is_spline", &iVal);
1448   m_isSpline = (iVal != 0);
1449
1450   iVal = (int) m_maintainStraightLines;
1451   clause->AssignAttributeValue("keep_lines_straight", &iVal);
1452   m_maintainStraightLines = (iVal != 0);
1453
1454   clause->AssignAttributeValue("align_start", &m_alignmentStart);
1455   clause->AssignAttributeValue("align_end", &m_alignmentEnd);
1456
1457   // Compatibility: check for no regions.
1458   if (m_regions.Number() == 0)
1459   {
1460     wxShapeRegion *newRegion = new wxShapeRegion;
1461     newRegion->SetName("Middle");
1462     newRegion->SetSize(150, 50);
1463     m_regions.Append((wxObject *)newRegion);
1464     if (m_text.Number() > 0)
1465     {
1466       newRegion->ClearText();
1467       wxNode *node = m_text.First();
1468       while (node)
1469       {
1470         wxShapeTextLine *textLine = (wxShapeTextLine *)node->Data();
1471         wxNode *next = node->Next();
1472         newRegion->GetFormattedText().Append((wxObject *)textLine);
1473         delete node;
1474         node = next;
1475       }
1476     }
1477
1478     newRegion = new wxShapeRegion;
1479     newRegion->SetName("Start");
1480     newRegion->SetSize(150, 50);
1481     m_regions.Append((wxObject *)newRegion);
1482
1483     newRegion = new wxShapeRegion;
1484     newRegion->SetName("End");
1485     newRegion->SetSize(150, 50);
1486     m_regions.Append((wxObject *)newRegion);
1487   }
1488
1489   m_attachmentTo = 0;
1490   m_attachmentFrom = 0;
1491
1492   clause->AssignAttributeValue("attachment_to", &m_attachmentTo);
1493   clause->AssignAttributeValue("attachment_from", &m_attachmentFrom);
1494
1495   wxExpr *line_list = NULL;
1496
1497   // When image is created, there are default control points. Override
1498   // them if there are some in the file.
1499   clause->AssignAttributeValue("controls", &line_list);
1500
1501   if (line_list)
1502   {
1503     // Read a list of lists for the spline controls
1504     if (m_lineControlPoints)
1505     {
1506       ClearPointList(*m_lineControlPoints);
1507     }
1508     else
1509       m_lineControlPoints = new wxList;
1510
1511     wxExpr *node = line_list->value.first;
1512
1513     while (node)
1514     {
1515       wxExpr *xexpr = node->value.first;
1516       double x = xexpr->RealValue();
1517
1518       wxExpr *yexpr = xexpr->next;
1519       double y = yexpr->RealValue();
1520
1521       wxRealPoint *point = new wxRealPoint(x, y);
1522       m_lineControlPoints->Append((wxObject*) point);
1523
1524       node = node->next;
1525     }
1526   }
1527
1528   // Read arrow list, for new OGL code
1529   wxExpr *arrow_list = NULL;
1530
1531   clause->AssignAttributeValue("arrows", &arrow_list);
1532   if (arrow_list)
1533   {
1534     wxExpr *node = arrow_list->value.first;
1535
1536     while (node)
1537     {
1538       WXTYPE arrowType = ARROW_ARROW;
1539       int arrowEnd = 0;
1540       double xOffset = 0.0;
1541       double arrowSize = 0.0;
1542       wxString arrowName("");
1543       long arrowId = -1;
1544
1545       wxExpr *type_expr = node->Nth(0);
1546       wxExpr *end_expr = node->Nth(1);
1547       wxExpr *dist_expr = node->Nth(2);
1548       wxExpr *size_expr = node->Nth(3);
1549       wxExpr *name_expr = node->Nth(4);
1550       wxExpr *id_expr = node->Nth(5);
1551
1552       // New members of wxArrowHead
1553       wxExpr *yOffsetExpr = node->Nth(6);
1554       wxExpr *spacingExpr = node->Nth(7);
1555
1556       if (type_expr)
1557         arrowType = (int)type_expr->IntegerValue();
1558       if (end_expr)
1559         arrowEnd = (int)end_expr->IntegerValue();
1560       if (dist_expr)
1561         xOffset = dist_expr->RealValue();
1562       if (size_expr)
1563         arrowSize = size_expr->RealValue();
1564       if (name_expr)
1565         arrowName = name_expr->StringValue();
1566       if (id_expr)
1567         arrowId = id_expr->IntegerValue();
1568
1569       if (arrowId == -1)
1570         arrowId = NewId();
1571       else
1572         RegisterId(arrowId);
1573
1574       wxArrowHead *arrowHead = AddArrow(arrowType, arrowEnd, arrowSize, xOffset, (char*) (const char*) arrowName, NULL, arrowId);
1575       if (yOffsetExpr)
1576         arrowHead->SetYOffset(yOffsetExpr->RealValue());
1577       if (spacingExpr)
1578         arrowHead->SetSpacing(spacingExpr->RealValue());
1579
1580       node = node->next;
1581     }
1582   }
1583 }
1584 #endif
1585
1586 void wxLineShape::Copy(wxShape& copy)
1587 {
1588   wxShape::Copy(copy);
1589
1590   wxASSERT( copy.IsKindOf(CLASSINFO(wxLineShape)) );
1591
1592   wxLineShape& lineCopy = (wxLineShape&) copy;
1593
1594   lineCopy.m_to = m_to;
1595   lineCopy.m_from = m_from;
1596   lineCopy.m_attachmentTo = m_attachmentTo;
1597   lineCopy.m_attachmentFrom = m_attachmentFrom;
1598   lineCopy.m_isSpline = m_isSpline;
1599   lineCopy.m_alignmentStart = m_alignmentStart;
1600   lineCopy.m_alignmentEnd = m_alignmentEnd;
1601   lineCopy.m_maintainStraightLines = m_maintainStraightLines;
1602   lineCopy.m_lineOrientations.Clear();
1603
1604   wxNode *node = m_lineOrientations.First();
1605   while (node)
1606   {
1607     lineCopy.m_lineOrientations.Append(node->Data());
1608     node = node->Next();
1609   }
1610
1611   if (lineCopy.m_lineControlPoints)
1612   {
1613     ClearPointList(*lineCopy.m_lineControlPoints);
1614     delete lineCopy.m_lineControlPoints;
1615   }
1616
1617   lineCopy.m_lineControlPoints = new wxList;
1618
1619   node = m_lineControlPoints->First();
1620   while (node)
1621   {
1622     wxRealPoint *point = (wxRealPoint *)node->Data();
1623     wxRealPoint *new_point = new wxRealPoint(point->x, point->y);
1624     lineCopy.m_lineControlPoints->Append((wxObject*) new_point);
1625     node = node->Next();
1626   }
1627
1628   // Copy arrows
1629   lineCopy.ClearArrowsAtPosition(-1);
1630   node = m_arcArrows.First();
1631   while (node)
1632   {
1633     wxArrowHead *arrow = (wxArrowHead *)node->Data();
1634     lineCopy.m_arcArrows.Append(new wxArrowHead(*arrow));
1635     node = node->Next();
1636   }
1637 }
1638
1639 // Override select, to create/delete temporary label-moving objects
1640 void wxLineShape::Select(bool select, wxDC* dc)
1641 {
1642   wxShape::Select(select, dc);
1643   if (select)
1644   {
1645     for (int i = 0; i < 3; i++)
1646     {
1647       wxNode *node = m_regions.Nth(i);
1648       if (node)
1649       {
1650         wxShapeRegion *region = (wxShapeRegion *)node->Data();
1651         if (region->m_formattedText.Number() > 0)
1652         {
1653           double w, h, x, y, xx, yy;
1654           region->GetSize(&w, &h);
1655           region->GetPosition(&x, &y);
1656           GetLabelPosition(i, &xx, &yy);
1657           if (m_labelObjects[i])
1658           {
1659             m_labelObjects[i]->Select(FALSE);
1660             m_labelObjects[i]->RemoveFromCanvas(m_canvas);
1661             delete m_labelObjects[i];
1662           }
1663           m_labelObjects[i] = OnCreateLabelShape(this, region, w, h);
1664           m_labelObjects[i]->AddToCanvas(m_canvas);
1665           m_labelObjects[i]->Show(TRUE);
1666           if (dc)
1667             m_labelObjects[i]->Move(*dc, (double)(x + xx), (double)(y + yy));
1668           m_labelObjects[i]->Select(TRUE, dc);
1669         }
1670       }
1671     }
1672   }
1673   else
1674   {
1675     for (int i = 0; i < 3; i++)
1676     {
1677       if (m_labelObjects[i])
1678       {
1679         m_labelObjects[i]->Select(FALSE, dc);
1680         m_labelObjects[i]->Erase(*dc);
1681         m_labelObjects[i]->RemoveFromCanvas(m_canvas);
1682         delete m_labelObjects[i];
1683         m_labelObjects[i] = NULL;
1684       }
1685     }
1686   }
1687 }
1688
1689 /*
1690  * Line control point
1691  *
1692  */
1693
1694 IMPLEMENT_DYNAMIC_CLASS(wxLineControlPoint, wxControlPoint)
1695
1696 wxLineControlPoint::wxLineControlPoint(wxShapeCanvas *theCanvas, wxShape *object, double size, double x, double y, int the_type):
1697   wxControlPoint(theCanvas, object, size, x, y, the_type)
1698 {
1699   m_xpos = x;
1700   m_ypos = y;
1701   m_type = the_type;
1702   m_point = NULL;
1703 }
1704
1705 wxLineControlPoint::~wxLineControlPoint()
1706 {
1707 }
1708
1709 void wxLineControlPoint::OnDraw(wxDC& dc)
1710 {
1711   wxRectangleShape::OnDraw(dc);
1712 }
1713
1714 // Implement movement of Line point
1715 void wxLineControlPoint::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
1716 {
1717     m_shape->GetEventHandler()->OnSizingDragLeft(this, draw, x, y, keys, attachment);
1718 }
1719
1720 void wxLineControlPoint::OnBeginDragLeft(double x, double y, int keys, int attachment)
1721 {
1722     m_shape->GetEventHandler()->OnSizingBeginDragLeft(this, x, y, keys, attachment);
1723 }
1724
1725 void wxLineControlPoint::OnEndDragLeft(double x, double y, int keys, int attachment)
1726 {
1727     m_shape->GetEventHandler()->OnSizingEndDragLeft(this, x, y, keys, attachment);
1728 }
1729
1730 // Control points ('handles') redirect control to the actual shape, to make it easier
1731 // to override sizing behaviour.
1732 void wxLineShape::OnSizingDragLeft(wxControlPoint* pt, bool draw, double x, double y, int keys, int attachment)
1733 {
1734   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1735
1736   wxClientDC dc(GetCanvas());
1737   GetCanvas()->PrepareDC(dc);
1738
1739   dc.SetLogicalFunction(wxXOR);
1740
1741   wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1742   dc.SetPen(dottedPen);
1743   dc.SetBrush((* wxTRANSPARENT_BRUSH));
1744
1745   if (lpt->m_type == CONTROL_POINT_LINE)
1746   {
1747     m_canvas->Snap(&x, &y);
1748
1749     lpt->SetX(x); lpt->SetY(y);
1750     lpt->m_point->x = x; lpt->m_point->y = y;
1751
1752     wxLineShape *lineShape = (wxLineShape *)this;
1753
1754     wxPen *old_pen = lineShape->GetPen();
1755     wxBrush *old_brush = lineShape->GetBrush();
1756
1757     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1758     lineShape->SetPen(& dottedPen);
1759     lineShape->SetBrush(wxTRANSPARENT_BRUSH);
1760
1761     lineShape->GetEventHandler()->OnMoveLink(dc, FALSE);
1762
1763     lineShape->SetPen(old_pen);
1764     lineShape->SetBrush(old_brush);
1765   }
1766
1767   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM || lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1768   {
1769 //    lpt->SetX(x); lpt->SetY(y);
1770   }
1771
1772 }
1773
1774 void wxLineShape::OnSizingBeginDragLeft(wxControlPoint* pt, double x, double y, int keys, int attachment)
1775 {
1776   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1777
1778   wxClientDC dc(GetCanvas());
1779   GetCanvas()->PrepareDC(dc);
1780
1781   wxLineShape *lineShape = (wxLineShape *)this;
1782   if (lpt->m_type == CONTROL_POINT_LINE)
1783   {
1784     lpt->m_originalPos = * (lpt->m_point);
1785     m_canvas->Snap(&x, &y);
1786
1787     this->Erase(dc);
1788
1789     // Redraw start and end objects because we've left holes
1790     // when erasing the line
1791     lineShape->GetFrom()->OnDraw(dc);
1792     lineShape->GetFrom()->OnDrawContents(dc);
1793     lineShape->GetTo()->OnDraw(dc);
1794     lineShape->GetTo()->OnDrawContents(dc);
1795
1796     this->SetDisableLabel(TRUE);
1797     dc.SetLogicalFunction(wxXOR);
1798
1799     lpt->m_xpos = x; lpt->m_ypos = y;
1800     lpt->m_point->x = x; lpt->m_point->y = y;
1801
1802     wxPen *old_pen = lineShape->GetPen();
1803     wxBrush *old_brush = lineShape->GetBrush();
1804
1805     wxPen dottedPen(wxColour(0, 0, 0), 1, wxDOT);
1806     lineShape->SetPen(& dottedPen);
1807     lineShape->SetBrush(wxTRANSPARENT_BRUSH);
1808
1809     lineShape->GetEventHandler()->OnMoveLink(dc, FALSE);
1810
1811     lineShape->SetPen(old_pen);
1812     lineShape->SetBrush(old_brush);
1813   }
1814
1815   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM || lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1816   {
1817     m_canvas->SetCursor(g_oglBullseyeCursor);
1818     lpt->m_oldCursor = wxSTANDARD_CURSOR;
1819   }
1820 }
1821
1822 void wxLineShape::OnSizingEndDragLeft(wxControlPoint* pt, double x, double y, int keys, int attachment)
1823 {
1824   wxLineControlPoint* lpt = (wxLineControlPoint*) pt;
1825
1826   wxClientDC dc(GetCanvas());
1827   GetCanvas()->PrepareDC(dc);
1828
1829   this->SetDisableLabel(FALSE);
1830   wxLineShape *lineShape = (wxLineShape *)this;
1831
1832   if (lpt->m_type == CONTROL_POINT_LINE)
1833   {
1834     m_canvas->Snap(&x, &y);
1835
1836     wxRealPoint pt = wxRealPoint(x, y);
1837
1838     // Move the control point back to where it was;
1839     // MoveControlPoint will move it to the new position
1840     // if it decides it wants. We only moved the position
1841     // during user feedback so we could redraw the line
1842     // as it changed shape.
1843     lpt->m_xpos = lpt->m_originalPos.x; lpt->m_ypos = lpt->m_originalPos.y;
1844     lpt->m_point->x = lpt->m_originalPos.x; lpt->m_point->y = lpt->m_originalPos.y;
1845
1846     OnMoveMiddleControlPoint(dc, lpt, pt);
1847   }
1848   if (lpt->m_type == CONTROL_POINT_ENDPOINT_FROM)
1849   {
1850     if (lpt->m_oldCursor)
1851       m_canvas->SetCursor(lpt->m_oldCursor);
1852
1853 //    this->Erase(dc);
1854
1855 //    lpt->m_xpos = x; lpt->m_ypos = y;
1856
1857     if (lineShape->GetFrom())
1858     {
1859       lineShape->GetFrom()->MoveLineToNewAttachment(dc, lineShape, x, y);
1860     }
1861   }
1862   if (lpt->m_type == CONTROL_POINT_ENDPOINT_TO)
1863   {
1864     if (lpt->m_oldCursor)
1865       m_canvas->SetCursor(lpt->m_oldCursor);
1866
1867 //    lpt->m_xpos = x; lpt->m_ypos = y;
1868
1869     if (lineShape->GetTo())
1870     {
1871       lineShape->GetTo()->MoveLineToNewAttachment(dc, lineShape, x, y);
1872     }
1873   }
1874
1875   // Needed?
1876 #if 0
1877   int i = 0;
1878   for (i = 0; i < lineShape->GetLineControlPoints()->Number(); i++)
1879     if (((wxRealPoint *)(lineShape->GetLineControlPoints()->Nth(i)->Data())) == lpt->m_point)
1880       break;
1881
1882   // N.B. in OnMoveControlPoint, an event handler in Hardy could have deselected
1883   // the line and therefore deleted 'this'. -> GPF, intermittently.
1884   // So assume at this point that we've been blown away.
1885
1886   lineShape->OnMoveControlPoint(i+1, x, y);
1887 #endif
1888 }
1889
1890 // This is called only when a non-end control point is moved.
1891 bool wxLineShape::OnMoveMiddleControlPoint(wxDC& dc, wxLineControlPoint* lpt, const wxRealPoint& pt)
1892 {
1893     lpt->m_xpos = pt.x; lpt->m_ypos = pt.y;
1894     lpt->m_point->x = pt.x; lpt->m_point->y = pt.y;
1895
1896     GetEventHandler()->OnMoveLink(dc);
1897
1898     return TRUE;
1899 }
1900
1901 // Implement movement of endpoint to a new attachment
1902 // OBSOLETE: done by dragging with the left button.
1903
1904 #if 0
1905 void wxLineControlPoint::OnDragRight(bool draw, double x, double y, int keys, int attachment)
1906 {
1907   if (m_type == CONTROL_POINT_ENDPOINT_FROM || m_type == CONTROL_POINT_ENDPOINT_TO)
1908   {
1909     m_xpos = x; m_ypos = y;
1910   }
1911 }
1912
1913 void wxLineControlPoint::OnBeginDragRight(double x, double y, int keys, int attachment)
1914 {
1915   wxClientDC dc(GetCanvas());
1916   GetCanvas()->PrepareDC(dc);
1917
1918   wxLineShape *lineShape = (wxLineShape *)m_shape;
1919   if (m_type == CONTROL_POINT_ENDPOINT_FROM || m_type == CONTROL_POINT_ENDPOINT_TO)
1920   {
1921     Erase(dc);
1922     lineShape->GetEventHandler()->OnDraw(dc);
1923     if (m_type == CONTROL_POINT_ENDPOINT_FROM)
1924     {
1925       lineShape->GetFrom()->GetEventHandler()->OnDraw(dc);
1926       lineShape->GetFrom()->GetEventHandler()->OnDrawContents(dc);
1927     }
1928     else
1929     {
1930       lineShape->GetTo()->GetEventHandler()->OnDraw(dc);
1931       lineShape->GetTo()->GetEventHandler()->OnDrawContents(dc);
1932     }
1933     m_canvas->SetCursor(g_oglBullseyeCursor);
1934     m_oldCursor = wxSTANDARD_CURSOR;
1935   }
1936 }
1937
1938 void wxLineControlPoint::OnEndDragRight(double x, double y, int keys, int attachment)
1939 {
1940   wxClientDC dc(GetCanvas());
1941   GetCanvas()->PrepareDC(dc);
1942
1943   wxLineShape *lineShape = (wxLineShape *)m_shape;
1944   if (m_type == CONTROL_POINT_ENDPOINT_FROM)
1945   {
1946     if (m_oldCursor)
1947       m_canvas->SetCursor(m_oldCursor);
1948
1949     m_xpos = x; m_ypos = y;
1950
1951     if (lineShape->GetFrom())
1952     {
1953       lineShape->GetFrom()->EraseLinks(dc);
1954
1955       int new_attachment;
1956       double distance;
1957
1958       if (lineShape->GetFrom()->HitTest(x, y, &new_attachment, &distance))
1959         lineShape->SetAttachments(new_attachment, lineShape->GetAttachmentTo());
1960
1961       lineShape->GetFrom()->MoveLinks(dc);
1962     }
1963   }
1964   if (m_type == CONTROL_POINT_ENDPOINT_TO)
1965   {
1966     if (m_oldCursor)
1967       m_canvas->SetCursor(m_oldCursor);
1968     m_shape->Erase(dc);
1969
1970     m_xpos = x; m_ypos = y;
1971
1972     if (lineShape->GetTo())
1973     {
1974       lineShape->GetTo()->EraseLinks(dc);
1975
1976       int new_attachment;
1977       double distance;
1978       if (lineShape->GetTo()->HitTest(x, y, &new_attachment, &distance))
1979         lineShape->SetAttachments(lineShape->GetAttachmentFrom(), new_attachment);
1980
1981       lineShape->GetTo()->MoveLinks(dc);
1982     }
1983   }
1984   int i = 0;
1985   for (i = 0; i < lineShape->GetLineControlPoints()->Number(); i++)
1986     if (((wxRealPoint *)(lineShape->GetLineControlPoints()->Nth(i)->Data())) == m_point)
1987       break;
1988   lineShape->OnMoveControlPoint(i+1, x, y);
1989   if (!m_canvas->GetQuickEditMode()) m_canvas->Redraw(dc);
1990 }
1991 #endif
1992
1993 /*
1994  * Get the point on the given line (x1, y1) (x2, y2)
1995  * distance 'length' along from the end,
1996  * returned values in x and y
1997  */
1998
1999 void GetPointOnLine(double x1, double y1, double x2, double y2,
2000                     double length, double *x, double *y)
2001 {
2002   double l = (double)sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1));
2003
2004   if (l < 0.01)
2005     l = (double) 0.01;
2006
2007   double i_bar = (x2 - x1)/l;
2008   double j_bar = (y2 - y1)/l;
2009
2010   *x = (- length*i_bar) + x2;
2011   *y = (- length*j_bar) + y2;
2012 }
2013
2014 wxArrowHead *wxLineShape::AddArrow(WXTYPE type, int end, double size, double xOffset,
2015     const wxString& name, wxPseudoMetaFile *mf, long arrowId)
2016 {
2017   wxArrowHead *arrow = new wxArrowHead(type, end, size, xOffset, name, mf, arrowId);
2018   m_arcArrows.Append(arrow);
2019   return arrow;
2020 }
2021
2022 /*
2023  * Add arrowhead at a particular position in the arrowhead list.
2024  */
2025 bool wxLineShape::AddArrowOrdered(wxArrowHead *arrow, wxList& referenceList, int end)
2026 {
2027   wxNode *refNode = referenceList.First();
2028   wxNode *currNode = m_arcArrows.First();
2029   wxString targetName(arrow->GetName());
2030   if (!refNode) return FALSE;
2031
2032   // First check whether we need to insert in front of list,
2033   // because this arrowhead is the first in the reference
2034   // list and should therefore be first in the current list.
2035   wxArrowHead *refArrow = (wxArrowHead *)refNode->Data();
2036   if (refArrow->GetName() == targetName)
2037   {
2038     m_arcArrows.Insert(arrow);
2039     return TRUE;
2040   }
2041
2042   while (refNode && currNode)
2043   {
2044     wxArrowHead *currArrow = (wxArrowHead *)currNode->Data();
2045     refArrow = (wxArrowHead *)refNode->Data();
2046
2047     // Matching: advance current arrow pointer
2048     if ((currArrow->GetArrowEnd() == end) &&
2049         (currArrow->GetName() == refArrow->GetName()))
2050     {
2051       currNode = currNode->Next(); // Could be NULL now
2052       if (currNode)
2053         currArrow = (wxArrowHead *)currNode->Data();
2054     }
2055
2056     // Check if we're at the correct position in the
2057     // reference list
2058     if (targetName == refArrow->GetName())
2059     {
2060       if (currNode)
2061         m_arcArrows.Insert(currNode, arrow);
2062       else
2063         m_arcArrows.Append(arrow);
2064       return TRUE;
2065     }
2066     refNode = refNode->Next();
2067   }
2068   m_arcArrows.Append(arrow);
2069   return TRUE;
2070 }
2071
2072 void wxLineShape::ClearArrowsAtPosition(int end)
2073 {
2074   wxNode *node = m_arcArrows.First();
2075   while (node)
2076   {
2077     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2078     wxNode *next = node->Next();
2079     switch (end)
2080     {
2081       case -1:
2082       {
2083         delete arrow;
2084         delete node;
2085         break;
2086       }
2087       case ARROW_POSITION_START:
2088       {
2089         if (arrow->GetArrowEnd() == ARROW_POSITION_START)
2090         {
2091           delete arrow;
2092           delete node;
2093         }
2094         break;
2095       }
2096       case ARROW_POSITION_END:
2097       {
2098         if (arrow->GetArrowEnd() == ARROW_POSITION_END)
2099         {
2100           delete arrow;
2101           delete node;
2102         }
2103         break;
2104       }
2105       case ARROW_POSITION_MIDDLE:
2106       {
2107         if (arrow->GetArrowEnd() == ARROW_POSITION_MIDDLE)
2108         {
2109           delete arrow;
2110           delete node;
2111         }
2112         break;
2113       }
2114     }
2115     node = next;
2116   }
2117 }
2118
2119 bool wxLineShape::ClearArrow(const wxString& name)
2120 {
2121   wxNode *node = m_arcArrows.First();
2122   while (node)
2123   {
2124     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2125     if (arrow->GetName() == name)
2126     {
2127       delete arrow;
2128       delete node;
2129       return TRUE;
2130     }
2131     node = node->Next();
2132   }
2133   return FALSE;
2134 }
2135
2136 /*
2137  * Finds an arrowhead at the given position (if -1, any position)
2138  *
2139  */
2140
2141 wxArrowHead *wxLineShape::FindArrowHead(int position, const wxString& name)
2142 {
2143   wxNode *node = m_arcArrows.First();
2144   while (node)
2145   {
2146     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2147     if (((position == -1) || (position == arrow->GetArrowEnd())) &&
2148         (arrow->GetName() == name))
2149       return arrow;
2150     node = node->Next();
2151   }
2152   return NULL;
2153 }
2154
2155 wxArrowHead *wxLineShape::FindArrowHead(long arrowId)
2156 {
2157   wxNode *node = m_arcArrows.First();
2158   while (node)
2159   {
2160     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2161     if (arrowId == arrow->GetId())
2162       return arrow;
2163     node = node->Next();
2164   }
2165   return NULL;
2166 }
2167
2168 /*
2169  * Deletes an arrowhead at the given position (if -1, any position)
2170  *
2171  */
2172
2173 bool wxLineShape::DeleteArrowHead(int position, const wxString& name)
2174 {
2175   wxNode *node = m_arcArrows.First();
2176   while (node)
2177   {
2178     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2179     if (((position == -1) || (position == arrow->GetArrowEnd())) &&
2180         (arrow->GetName() == name))
2181     {
2182       delete arrow;
2183       delete node;
2184       return TRUE;
2185     }
2186     node = node->Next();
2187   }
2188   return FALSE;
2189 }
2190
2191 // Overloaded DeleteArrowHead: pass arrowhead id.
2192 bool wxLineShape::DeleteArrowHead(long id)
2193 {
2194   wxNode *node = m_arcArrows.First();
2195   while (node)
2196   {
2197     wxArrowHead *arrow = (wxArrowHead *)node->Data();
2198     if (arrow->GetId() == id)
2199     {
2200       delete arrow;
2201       delete node;
2202       return TRUE;
2203     }
2204     node = node->Next();
2205   }
2206   return FALSE;
2207 }
2208
2209 /*
2210  * Calculate the minimum width a line
2211  * occupies, for the purposes of drawing lines in tools.
2212  *
2213  */
2214
2215 double wxLineShape::FindMinimumWidth()
2216 {
2217   double minWidth = 0.0;
2218   wxNode *node = m_arcArrows.First();
2219   while (node)
2220   {
2221     wxArrowHead *arrowHead = (wxArrowHead *)node->Data();
2222     minWidth += arrowHead->GetSize();
2223     if (node->Next())
2224       minWidth += arrowHead->GetSpacing();
2225
2226     node = node->Next();
2227   }
2228   // We have ABSOLUTE minimum now. So
2229   // scale it to give it reasonable aesthetics
2230   // when drawing with line.
2231   if (minWidth > 0.0)
2232     minWidth = (double)(minWidth * 1.4);
2233   else
2234     minWidth = 20.0;
2235
2236   SetEnds(0.0, 0.0, minWidth, 0.0);
2237   Initialise();
2238
2239   return minWidth;
2240 }
2241
2242 // Find which position we're talking about at this (x, y).
2243 // Returns ARROW_POSITION_START, ARROW_POSITION_MIDDLE, ARROW_POSITION_END
2244 int wxLineShape::FindLinePosition(double x, double y)
2245 {
2246   double startX, startY, endX, endY;
2247   GetEnds(&startX, &startY, &endX, &endY);
2248
2249   // Find distances from centre, start and end. The smallest wins.
2250   double centreDistance = (double)(sqrt((x - m_xpos)*(x - m_xpos) + (y - m_ypos)*(y - m_ypos)));
2251   double startDistance = (double)(sqrt((x - startX)*(x - startX) + (y - startY)*(y - startY)));
2252   double endDistance = (double)(sqrt((x - endX)*(x - endX) + (y - endY)*(y - endY)));
2253
2254   if (centreDistance < startDistance && centreDistance < endDistance)
2255     return ARROW_POSITION_MIDDLE;
2256   else if (startDistance < endDistance)
2257     return ARROW_POSITION_START;
2258   else
2259     return ARROW_POSITION_END;
2260 }
2261
2262 // Set alignment flags
2263 void wxLineShape::SetAlignmentOrientation(bool isEnd, bool isHoriz)
2264 {
2265   if (isEnd)
2266   {
2267     if (isHoriz && ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) != LINE_ALIGNMENT_HORIZ))
2268       m_alignmentEnd |= LINE_ALIGNMENT_HORIZ;
2269     else if (!isHoriz && ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ))
2270       m_alignmentEnd -= LINE_ALIGNMENT_HORIZ;
2271   }
2272   else
2273   {
2274     if (isHoriz && ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) != LINE_ALIGNMENT_HORIZ))
2275       m_alignmentStart |= LINE_ALIGNMENT_HORIZ;
2276     else if (!isHoriz && ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ))
2277       m_alignmentStart -= LINE_ALIGNMENT_HORIZ;
2278   }
2279 }
2280
2281 void wxLineShape::SetAlignmentType(bool isEnd, int alignType)
2282 {
2283   if (isEnd)
2284   {
2285     if (alignType == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2286     {
2287       if ((m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE) != LINE_ALIGNMENT_TO_NEXT_HANDLE)
2288         m_alignmentEnd |= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2289     }
2290     else if ((m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE) == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2291       m_alignmentEnd -= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2292   }
2293   else
2294   {
2295     if (alignType == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2296     {
2297       if ((m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE) != LINE_ALIGNMENT_TO_NEXT_HANDLE)
2298         m_alignmentStart |= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2299     }
2300     else if ((m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE) == LINE_ALIGNMENT_TO_NEXT_HANDLE)
2301       m_alignmentStart -= LINE_ALIGNMENT_TO_NEXT_HANDLE;
2302   }
2303 }
2304
2305 bool wxLineShape::GetAlignmentOrientation(bool isEnd)
2306 {
2307   if (isEnd)
2308     return ((m_alignmentEnd & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ);
2309   else
2310     return ((m_alignmentStart & LINE_ALIGNMENT_HORIZ) == LINE_ALIGNMENT_HORIZ);
2311 }
2312
2313 int wxLineShape::GetAlignmentType(bool isEnd)
2314 {
2315   if (isEnd)
2316     return (m_alignmentEnd & LINE_ALIGNMENT_TO_NEXT_HANDLE);
2317   else
2318     return (m_alignmentStart & LINE_ALIGNMENT_TO_NEXT_HANDLE);
2319 }
2320
2321 wxRealPoint *wxLineShape::GetNextControlPoint(wxShape *nodeObject)
2322 {
2323   int n = m_lineControlPoints->Number();
2324   int nn = 0;
2325   if (m_to == nodeObject)
2326   {
2327     // Must be END of line, so we want (n - 1)th control point.
2328     // But indexing ends at n-1, so subtract 2.
2329     nn = n - 2;
2330   }
2331   else nn = 1;
2332   wxNode *node = m_lineControlPoints->Nth(nn);
2333   if (node)
2334   {
2335     return (wxRealPoint *)node->Data();
2336   }
2337   else
2338     return FALSE;
2339 }
2340
2341 /*
2342  * Arrowhead
2343  *
2344  */
2345
2346 IMPLEMENT_DYNAMIC_CLASS(wxArrowHead, wxObject)
2347
2348 wxArrowHead::wxArrowHead(WXTYPE type, int end, double size, double dist, const wxString& name,
2349                      wxPseudoMetaFile *mf, long arrowId)
2350 {
2351   m_arrowType = type; m_arrowEnd = end; m_arrowSize = size;
2352   m_xOffset = dist;
2353   m_yOffset = 0.0;
2354   m_spacing = 5.0;
2355
2356   m_arrowName = name;
2357   m_metaFile = mf;
2358   m_id = arrowId;
2359   if (m_id == -1)
2360     m_id = NewId();
2361 }
2362
2363 wxArrowHead::wxArrowHead(wxArrowHead& toCopy)
2364 {
2365   m_arrowType = toCopy.m_arrowType; m_arrowEnd = toCopy.GetArrowEnd();
2366   m_arrowSize = toCopy.m_arrowSize;
2367   m_xOffset = toCopy.m_xOffset;
2368   m_yOffset = toCopy.m_yOffset;
2369   m_spacing = toCopy.m_spacing;
2370   m_arrowName = toCopy.m_arrowName ;
2371   if (toCopy.m_metaFile)
2372     m_metaFile = new wxPseudoMetaFile(*(toCopy.m_metaFile));
2373   else
2374     m_metaFile = NULL;
2375   m_id = NewId();
2376 }
2377
2378 wxArrowHead::~wxArrowHead()
2379 {
2380   if (m_metaFile) delete m_metaFile;
2381 }
2382
2383 void wxArrowHead::SetSize(double size)
2384 {
2385   m_arrowSize = size;
2386   if ((m_arrowType == ARROW_METAFILE) && m_metaFile)
2387   {
2388     double oldWidth = m_metaFile->m_width;
2389     if (oldWidth == 0.0)
2390       return;
2391
2392     double scale = (double)(size/oldWidth);
2393     if (scale != 1.0)
2394       m_metaFile->Scale(scale, scale);
2395   }
2396 }
2397
2398 // Can override this to create a different class of label shape
2399 wxLabelShape* wxLineShape::OnCreateLabelShape(wxLineShape *parent, wxShapeRegion *region, double w, double h)
2400 {
2401     return new wxLabelShape(parent, region, w, h);
2402 }
2403
2404 /*
2405  * Label object
2406  *
2407  */
2408
2409 IMPLEMENT_DYNAMIC_CLASS(wxLabelShape, wxRectangleShape)
2410
2411 wxLabelShape::wxLabelShape(wxLineShape *parent, wxShapeRegion *region, double w, double h):wxRectangleShape(w, h)
2412 {
2413   m_lineShape = parent;
2414   m_shapeRegion = region;
2415   SetPen(wxThePenList->FindOrCreatePen(wxColour(0, 0, 0), 1, wxDOT));
2416 }
2417
2418 wxLabelShape::~wxLabelShape()
2419 {
2420 }
2421
2422 void wxLabelShape::OnDraw(wxDC& dc)
2423 {
2424   if (m_lineShape && !m_lineShape->GetDrawHandles())
2425     return;
2426
2427     double x1 = (double)(m_xpos - m_width/2.0);
2428     double y1 = (double)(m_ypos - m_height/2.0);
2429
2430     if (m_pen)
2431     {
2432       if (m_pen->GetWidth() == 0)
2433         dc.SetPen(g_oglTransparentPen);
2434       else
2435         dc.SetPen(m_pen);
2436     }
2437     dc.SetBrush(wxTRANSPARENT_BRUSH);
2438
2439     if (m_cornerRadius > 0.0)
2440       dc.DrawRoundedRectangle(WXROUND(x1), WXROUND(y1), WXROUND(m_width), WXROUND(m_height), m_cornerRadius);
2441     else
2442       dc.DrawRectangle(WXROUND(x1), WXROUND(y1), WXROUND(m_width), WXROUND(m_height));
2443 }
2444
2445 void wxLabelShape::OnDrawContents(wxDC& dc)
2446 {
2447 }
2448
2449 void wxLabelShape::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
2450 {
2451   wxRectangleShape::OnDragLeft(draw, x, y, keys, attachment);
2452 }
2453
2454 void wxLabelShape::OnBeginDragLeft(double x, double y, int keys, int attachment)
2455 {
2456   wxRectangleShape::OnBeginDragLeft(x, y, keys, attachment);
2457 }
2458
2459 void wxLabelShape::OnEndDragLeft(double x, double y, int keys, int attachment)
2460 {
2461   wxRectangleShape::OnEndDragLeft(x, y, keys, attachment);
2462 }
2463
2464 bool wxLabelShape::OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display)
2465 {
2466     return m_lineShape->OnLabelMovePre(dc, this, x, y, old_x, old_y, display);
2467 }
2468
2469 bool wxLineShape::OnLabelMovePre(wxDC& dc, wxLabelShape* labelShape, double x, double y, double old_x, double old_y, bool display)
2470 {
2471   labelShape->m_shapeRegion->SetSize(labelShape->GetWidth(), labelShape->GetHeight());
2472
2473   // Find position in line's region list
2474   int i = 0;
2475   wxNode *node = GetRegions().First();
2476   while (node)
2477   {
2478     if (labelShape->m_shapeRegion == (wxShapeRegion *)node->Data())
2479       node = NULL;
2480     else
2481     {
2482       node = node->Next();
2483       i ++;
2484     }
2485   }
2486   double xx, yy;
2487   GetLabelPosition(i, &xx, &yy);
2488   // Set the region's offset, relative to the default position for
2489   // each region.
2490   labelShape->m_shapeRegion->SetPosition((double)(x - xx), (double)(y - yy));
2491
2492   labelShape->SetX(x);
2493   labelShape->SetY(y);
2494
2495   // Need to reformat to fit region.
2496   if (labelShape->m_shapeRegion->GetText())
2497   {
2498
2499     wxString s(labelShape->m_shapeRegion->GetText());
2500     labelShape->FormatText(dc, s, i);
2501     DrawRegion(dc, labelShape->m_shapeRegion, xx, yy);
2502   }
2503   return TRUE;
2504 }
2505
2506 // Divert left and right clicks to line object
2507 void wxLabelShape::OnLeftClick(double x, double y, int keys, int attachment)
2508 {
2509   m_lineShape->GetEventHandler()->OnLeftClick(x, y, keys, attachment);
2510 }
2511
2512 void wxLabelShape::OnRightClick(double x, double y, int keys, int attachment)
2513 {
2514   m_lineShape->GetEventHandler()->OnRightClick(x, y, keys, attachment);
2515 }
2516