Shamusworld >> Repos - ttedit/blob - src/editwindow.cpp

   1 //
   2 // TTEDIT.CPP - The TrueType Editor
   3 // by James L. Hammons
   4 // (C) 2004 Underground Software
   5 //
   6 // JLH = James L. Hammons <jlhamm@acm.org>
   7 //
   8 // Who  When        What
   9 // ---  ----------  -----------------------------------------------------------
  10 // JLH  08/28/2008  Created this file
  11 // JLH  09/02/2008  Separated scrolling from dedicated tool to MMB drag
  12 // JLH  03/13/2009  Converted from wxWidgets to Qt
  13 //
  14
  15 // FIXED:
  16 //
  17 // - Fixed scrolling
  18 //
  19 // STILL TO BE DONE:
  20 //
  21 // - Fix bug in Glyphpoints when dragging on an empty canvas or loading a font
  22 // - Fix zooming, settings (ini)
  23 // - Fix point adding bug 1: should be able to add points to empty canvas
  24 // - Fix point adding bug 2: should be able to add point successfully to single
  25 //   point on screen
  26 // - Add poly multi-select
  27 // - Add point multi-select
  28 // - Undo system
  29 //
  30
  31 // Uncomment this for debugging...
  32 #define DEBUG
  33 #define DEBUGFOO            // Various tool debugging...
  34 #define DEBUGTP                         // Toolpalette debugging...
  35
  36 #include "editwindow.h"
  37 #include "charwindow.h"
  38 #include "debug.h"
  39 #include "global.h"
  40 #include "mainwindow.h"
  41 #include "ttedit.h"
  42 #include "vector.h"
  43
  44
  45 EditWindow::EditWindow(QWidget * parent/*= NULL*/): QWidget(parent),
  46         scale(1.0), offsetX(-10), offsetY(-10), tool(TOOLSelect),
  47         ptHighlight(-1), oldPtHighlight(-1), ptNextHighlight(-1), oldPtNextHighlight(-1),
  48         polyFirstPoint(true), showRotationCenter(false), haveZeroPoint(false),
  49         selectionInProgress(false)
  50 {
  51         setBackgroundRole(QPalette::Base);
  52         setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
  53
  54         toolPalette = new ToolWindow();
  55         CreateCursors();
  56         setCursor(cur[TOOLSelect]);
  57         setMouseTracking(true);
  58         ClearSelection();
  59 }
  60
  61
  62 QSize EditWindow::minimumSizeHint() const
  63 {
  64         return QSize(50, 50);
  65 }
  66
  67
  68 QSize EditWindow::sizeHint() const
  69 {
  70         return QSize(400, 400);
  71 }
  72
  73
  74 void EditWindow::CreateCursors(void)
  75 {
  76         int hotx[12] = {  1,  1, 1, 15,  1,  1,  1,  1,  1,  1,  1, 11 };
  77         int hoty[12] = {  1,  1, 1, 13,  1,  1,  1,  1,  1,  1,  1, 11 };
  78         char cursorName[12][48] = { "select", "select-poly", "select-multi", "zoom",
  79                 "add-point", "add-poly", "del-point", "del-poly", "rotate", "rotate",
  80                 "select", "scroll" };
  81
  82         for(int i=0; i<12; i++)
  83         {
  84                 QString s;
  85                 s.sprintf(":/res/cursor-%s.png", cursorName[i]);
  86                 QPixmap pmTmp(s);
  87                 cur[i] = QCursor(pmTmp, hotx[i], hoty[i]);
  88         }
  89 }
  90
  91 #if 0
  92 QPoint EditWindow::GetAdjustedMousePosition(QMouseEvent * event)
  93 {
  94         // This is undoing the transform, e.g. going from client coords to local
  95         // coords. In essence, the height - y is height + (y * -1), the (y * -1)
  96         // term doing the conversion of the y-axis from increasing bottom to top.
  97         return QPoint(offsetX + event->x(), offsetY + (size().height() - event->y()));
  98 }
  99
 100
 101 QPoint EditWindow::GetAdjustedClientPosition(int x, int y)
 102 {
 103         // VOODOO ALERT (ON Y COMPONENT!!!!)
 104         return QPoint(-offsetX + x, (size().height() - (-offsetY + y)) * +1.0);
 105 }
 106 #endif
 107
 108 /*
 109 TODO:
 110  o  Different colors for polys on selected points
 111  o  Different colors for handles on non-selected polys
 112  o  Line of sight (dashed, dotted) for off-curve points
 113  o  Repaints for press/release of CTRL/SHIFT during point creation
 114 */
 115 void EditWindow::paintEvent(QPaintEvent * /*event*/)
 116 {
 117         QPainter qtp(this);
 118         Painter painter(&qtp);
 119         painter.SetRenderHint(QPainter::Antialiasing);
 120
 121         Global::zoom = scale;
 122         Global::origin = Vector(offsetX, offsetY);
 123         Global::viewportHeight = size().height();
 124         Global::screenSize = Vector(size().width(), size().height());
 125 //      p.translate(QPoint(-offsetX, size().height() - (-offsetY)));
 126 //      p.scale(1.0, -1.0);
 127 //Nope, a big load of shit. So we'll have to bite the bullet and do it the
 128 //hard way™.
 129 //      p.scale(scale, -scale);
 130
 131 // Scrolling can be done by using OffsetViewportOrgEx
 132 // Scaling can be done by adjusting SetWindowExtEx (it's denominator of txform)
 133 // you'd use: % = ViewportExt / WindowExt
 134 // But it makes the window look like crap: fuggetuboutit.
 135 // Instead, we have to scale EVERYTHING by hand. Crap!
 136 // It's not *that* bad, but not as convenient either...
 137
 138         painter.SetPen(QPen(Qt::blue, 1.0, Qt::DotLine));
 139
 140         // Draw coordinate axes
 141
 142         painter.DrawLine(0, -16384, 0, 16384);
 143         painter.DrawLine(-16384, 0, 16384, 0);
 144
 145         // Draw rotation center (if active)
 146
 147         if (showRotationCenter)
 148         {
 149                 painter.SetPen(QPen(Qt::red, 2.0, Qt::SolidLine));
 150                 painter.DrawLine(rotationCenter.x + 7, rotationCenter.y, rotationCenter.x - 7, rotationCenter.y);
 151                 painter.DrawLine(rotationCenter.x, rotationCenter.y + 7, rotationCenter.x, rotationCenter.y - 7);
 152         }
 153
 154         // Draw points
 155
 156         for(int i=0; i<pts.GetNumPoints(); i++)
 157         {
 158                 /*if (tool == TOOLMultiSelect)
 159                 {
 160                         if (selectedPoints[i])
 161                         {
 162                                 qtp.setPen(QPen(Qt::red, 1.0, Qt::SolidLine));
 163                         }
 164                         else
 165                         {
 166                                 qtp.setPen(QPen(Qt::black, 1.0, Qt::SolidLine));
 167                         }
 168                 }
 169                 else*/
 170                 if (((i == ptHighlight) && (tool != TOOLMultiSelect)) || ((tool == TOOLMultiSelect) && selectedPoints[i]))
 171                 {
 172                         painter.SetPen(QPen(Qt::red, 1.0, Qt::SolidLine));
 173
 174                         if (pts.GetOnCurve(i))
 175                         {
 176                                 painter.DrawSquareDotN(pts.GetXY(i), 7);
 177                                 painter.DrawSquareDotN(pts.GetXY(i), 9);
 178                         }
 179                         else
 180                         {
 181                                 painter.DrawRoundDotN(pts.GetXY(i), 7);
 182                                 painter.DrawRoundDotN(pts.GetXY(i), 9);
 183                         }
 184                 }
 185                 else if ((i == ptHighlight || i == ptNextHighlight) && tool == TOOLAddPt)
 186                 {
 187                         painter.SetPen(QPen(Qt::green, 1.0, Qt::SolidLine));
 188
 189                         if (pts.GetOnCurve(i))
 190                         {
 191                                 painter.DrawSquareDotN(pts.GetXY(i), 7);
 192                                 painter.DrawSquareDotN(pts.GetXY(i), 9);
 193                         }
 194                         else
 195                         {
 196                                 painter.DrawRoundDotN(pts.GetXY(i), 7);
 197                                 painter.DrawRoundDotN(pts.GetXY(i), 9);
 198                         }
 199                 }
 200                 else
 201                 {
 202                         painter.SetPen(QPen(Qt::black, 1.0, Qt::SolidLine));
 203
 204 #if 1
 205                         if (pts.GetOnCurve(i))
 206                                 painter.DrawSquareDot(pts.GetXY(i));
 207                         else
 208                                 painter.DrawRoundDot(pts.GetXY(i));
 209 #else
 210                         (pts.GetOnCurve(i) ? DrawSquareDot(p, pts.GetX(i), pts.GetY(i))
 211                                 : DrawRoundDot(p, pts.GetX(i), pts.GetY(i)));
 212 #endif
 213                 }
 214
 215                 if (tool == TOOLDelPt && i == ptHighlight)
 216                 {
 217                         painter.SetPen(QPen(Qt::red, 1.0, Qt::SolidLine));
 218                         painter.DrawLine(pts.GetX(i) - 5, pts.GetY(i) - 5, pts.GetX(i) + 5, pts.GetY(i) + 5);
 219                         painter.DrawLine(pts.GetX(i) + 5, pts.GetY(i) - 5, pts.GetX(i) - 5, pts.GetY(i) + 5);
 220                 }
 221         }
 222
 223         // Draw curve formed by points
 224
 225         painter.SetPen(QPen(Qt::black, 1.0, Qt::SolidLine));
 226         DrawGlyph(painter, pts);
 227
 228         if (haveZeroPoint)
 229         {
 230                 // Rotation code
 231                 GlyphPoints rotated = pts;
 232
 233                 if (tool == TOOLRotate)
 234                         rotated.RotatePoints(rotationAngle, IPoint(rotationCenter.x, rotationCenter.y));
 235                 else if (tool == TOOLRotatePoly)
 236                 {
 237                         uint16_t poly = rotated.GetPolyForPointNumber(ptHighlight);
 238                         rotated.RotatePolyAroundCentroid(poly, rotationAngle);
 239                 }
 240
 241                 painter.SetPen(QPen(QColor(255, 0, 255), 1.0, Qt::SolidLine));
 242                 DrawGlyph(painter, rotated);
 243         }
 244
 245         if (selectionInProgress)
 246         {
 247                 painter.SetPen(QPen(QColor(255, 127, 0, 255)));
 248                 painter.SetBrush(QBrush(QColor(255, 127, 0, 100)));
 249                 painter.DrawRect(selection);
 250         }
 251 }
 252
 253
 254 void EditWindow::DrawGlyph(Painter & p, GlyphPoints & glyph)
 255 {
 256         for(int poly=0; poly<glyph.GetNumPolys(); poly++)
 257         {
 258 #if 0
 259                 if (glyph.GetNumPoints(poly) < 3)
 260                         continue;
 261
 262                 // Initial move: If our start point is on curve, then go to it. Otherwise,
 263                 // check previous point. If it's on curve, go to it otherwise go the
 264                 // midpoint between start point and previous (since it's between two curve
 265                 // control points).
 266                 IPoint pt = (glyph.GetOnCurve(poly, 0)
 267                         ? glyph.GetPoint(poly, 0) : (glyph.GetPrevOnCurve(poly, 0)
 268                                 ? glyph.GetPrevPoint(poly, 0) : glyph.GetMidpointToPrev(poly, 0)));
 269
 270 // Need to add separate color handling here for polys that are being manipulated...
 271
 272                 for(int i=0; i<glyph.GetNumPoints(poly); i++)
 273                 {
 274                         // If this point and then next are both on curve, we have a line...
 275                         if (glyph.GetOnCurve(poly, i) && glyph.GetNextOnCurve(poly, i))
 276                         {
 277                                 IPoint pt2 = glyph.GetNextPoint(poly, i);
 278                                 p.drawLine(pt.x, pt.y, pt2.x, pt2.y);
 279                                 pt = pt2;
 280                         }
 281                         else
 282                         {
 283                                 // Skip point if it's on curve (start of curve--it's already
 284                                 // been plotted so we don't need to handle it...)
 285                                 if (glyph.GetOnCurve(poly, i))
 286                                         continue;
 287
 288                                 // We are now guaranteed that we are sitting on a curve control point
 289                                 // (off curve). Figure the extent of the curve: If the following is a
 290                                 // curve control point, then use the midpoint to it otherwise go to
 291                                 // the next point since it's on curve.
 292                                 IPoint pt2 = (glyph.GetNextOnCurve(poly, i)
 293                                         ? glyph.GetNextPoint(poly, i) : glyph.GetMidpointToNext(poly, i));
 294
 295                                 Bezier(p, pt, glyph.GetPoint(poly, i), pt2);
 296                                 pt = pt2;
 297                         }
 298                 }
 299 #else
 300                 DrawGlyphPoly(p, glyph, poly);
 301 #endif
 302         }
 303 }
 304
 305
 306 void EditWindow::DrawGlyphPoly(Painter & p, GlyphPoints & glyph, uint16_t poly)
 307 {
 308         // Sanity check
 309         if (glyph.GetNumPoints(poly) < 3)
 310                 return;
 311
 312         // Initial move: If our start point is on curve, then go to it. Otherwise,
 313         // check previous point. If it's on curve, go to it otherwise go the
 314         // midpoint between start point and previous (since it's between two curve
 315         // control points).
 316         IPoint pt = (glyph.GetOnCurve(poly, 0)
 317                 ? glyph.GetPoint(poly, 0) : (glyph.GetPrevOnCurve(poly, 0)
 318                         ? glyph.GetPrevPoint(poly, 0) : glyph.GetMidpointToPrev(poly, 0)));
 319
 320         for(int i=0; i<glyph.GetNumPoints(poly); i++)
 321         {
 322                 // If this point and then next are both on curve, we have a line...
 323                 if (glyph.GetOnCurve(poly, i) && glyph.GetNextOnCurve(poly, i))
 324                 {
 325                         IPoint pt2 = glyph.GetNextPoint(poly, i);
 326                         p.DrawLine(pt.x, pt.y, pt2.x, pt2.y);
 327                         pt = pt2;
 328                 }
 329                 else
 330                 {
 331                         // Skip point if it's on curve (start of curve--it's already
 332                         // been plotted so we don't need to handle it...)
 333                         if (glyph.GetOnCurve(poly, i))
 334                                 continue;
 335
 336                         // We are now guaranteed that we are sitting on a curve control
 337                         // point (off curve). Figure the extent of the curve: If the
 338                         // following is a curve control point, then use the midpoint to it
 339                         // otherwise go to the next point since it's on curve.
 340                         IPoint pt2 = (glyph.GetNextOnCurve(poly, i)
 341                                 ? glyph.GetNextPoint(poly, i) : glyph.GetMidpointToNext(poly, i));
 342
 343                         p.DrawBezier(pt, glyph.GetPoint(poly, i), pt2);
 344                         pt = pt2;
 345                 }
 346         }
 347 }
 348
 349
 350 void EditWindow::ClearSelection(void)
 351 {
 352         for(int i=0; i<65536; i++)
 353                 selectedPoints[i] = false;
 354 }
 355
 356
 357 void EditWindow::mousePressEvent(QMouseEvent * event)
 358 {
 359         if (event->button() == Qt::RightButton)
 360         {
 361                 toolPalette->move(event->globalPos());
 362                 toolPalette->setVisible(true);
 363                 setCursor(cur[TOOLSelect]);
 364                 toolPalette->prevTool = TOOLSelect;
 365         }
 366         else if (event->button() == Qt::MidButton)
 367         {
 368                 // Scrolling cursor
 369                 setCursor(cur[11]);
 370                 ptPrevious = Vector(event->x(), event->y());
 371                 ptPrevious /= Global::zoom;
 372         }
 373         else if (event->button() == Qt::LeftButton)
 374         {
 375                 if (tool == TOOLScroll || tool == TOOLZoom)
 376 ;//meh                  CaptureMouse();                                         // Make sure we capture the mouse when in scroll/zoom mode
 377                 else if (tool == TOOLMultiSelect)
 378                 {
 379 //                      QPoint pt = GetAdjustedMousePosition(event);
 380                         Vector pt = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 381                         selectionInProgress = true;
 382                         selection.setTopLeft(QPoint(pt.x, pt.y));
 383                         selection.setBottomRight(QPoint(pt.x, pt.y));
 384                 }
 385                 else if (tool == TOOLAddPt)             // "Add Point" tool
 386                 {
 387 //                      QPoint pt = GetAdjustedMousePosition(event);
 388                         Vector pt = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 389                         IPoint pointToAdd(pt.x, pt.y, ((event->modifiers() == Qt::ShiftModifier || event->modifiers() == Qt::ControlModifier) ? false : true));
 390
 391                         if (pts.GetNumPoints() < 2)
 392                         {
 393 //                              pts += IPoint(pt.x(), pt.y(), ((event->modifiers() == Qt::ShiftModifier || event->modifiers() == Qt::ControlModifier) ? false : true));
 394                                 pts += pointToAdd;
 395                                 ptHighlight = pts.GetNumPoints() - 1;
 396                         }
 397                         else
 398                         {
 399 //                              QPoint pt = GetAdjustedMousePosition(event);
 400 //                              pts.InsertPoint(pts.GetNext(ptHighlight), pt.x(), pt.y(), ((event->modifiers() == Qt::ShiftModifier || event->modifiers() == Qt::ControlModifier) ? false : true));
 401                                 pts.InsertPoint(pts.GetNext(ptHighlight), pointToAdd);
 402                                 ptHighlight = ptNextHighlight;
 403 //                              update();
 404                         }
 405
 406                         update();
 407                 }
 408                 else if (tool == TOOLAddPoly)   // "Add Poly" tool
 409                 {
 410 #ifdef DEBUGFOO
 411 WriteLogMsg("Adding point... # polys: %u, # points: %u", pts.GetNumPolys(), pts.GetNumPoints());
 412 #endif
 413                         if (polyFirstPoint)
 414                         {
 415                                 polyFirstPoint = false;
 416                                 pts.AddNewPolyAtEnd();
 417                         }
 418
 419 //                      QPoint pt = GetAdjustedMousePosition(event);
 420                         Vector pt = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 421 //printf("GetAdjustedMousePosition = %i, %i\n", pt.x(), pt.y());
 422                         // Append a point to the end of the structure
 423                         pts += IPoint(pt.x, pt.y, ((event->modifiers() == Qt::ShiftModifier || event->modifiers() == Qt::ControlModifier) ? false : true));
 424                         ptHighlight = pts.GetNumPoints() - 1;
 425                         update();
 426 #ifdef DEBUGFOO
 427 WriteLogMsg(" --> [# polys: %u, # points: %u]\n", pts.GetNumPolys(), pts.GetNumPoints());
 428 #endif
 429                 }
 430                 else if (tool == TOOLSelect || tool == TOOLPolySelect)
 431                 {
 432                         if (pts.GetNumPoints() > 0)
 433                         {
 434 //                              pt = GetAdjustedClientPosition(pts.GetX(ptHighlight), pts.GetY(ptHighlight));
 435                                 Vector pt = Painter::CartesianToQtCoords(Vector(pts.GetX(ptHighlight), pts.GetY(ptHighlight)));
 436 //printf("GetAdjustedClientPosition = %i, %i\n", pt.x(), pt.y());
 437                                 QPoint warp(pt.x, pt.y);
 438                                 QCursor::setPos(mapToGlobal(warp));
 439
 440                                 if (event->modifiers() == Qt::ShiftModifier || event->modifiers() == Qt::ControlModifier)
 441                                 {
 442                                         pts.SetOnCurve(ptHighlight, !pts.GetOnCurve(ptHighlight));
 443                                         update();
 444                                 }
 445                         }
 446                 }
 447                 else if (tool == TOOLDelPt)
 448                 {
 449                         if (pts.GetNumPoints() > 0)
 450 //Or could use:
 451 //                      if (ptHighlight != -1)
 452                         {
 453 //This assumes that WM_MOUSEMOVE happens before this!
 454 //The above commented out line should take care of this contingency... !!! FIX !!!
 455                                 pts.DeletePoint(ptHighlight);
 456                                 update();
 457                         }
 458                 }
 459                 else if (tool == TOOLRotate)
 460                 {
 461                         // I think what's needed here is to keep the initial mouse click,
 462                         // paint the rotation center, then use the 1st mouse move event to establish
 463                         // the rotation "zero line", which becomes the line of reference to all
 464                         // subsequent mouse moves.
 465 //                      rotationCenter = GetAdjustedMousePosition(event);
 466                         rotationCenter = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 467                         showRotationCenter = true;
 468                         haveZeroPoint = false;
 469                         rotationAngle = 0;
 470                         update();
 471                 }
 472                 else if (tool == TOOLRotatePoly)
 473                 {
 474                         IPoint centroid = pts.GetPolyCentroid(pts.GetPolyForPointNumber(ptHighlight));
 475                         rotationCenter = Vector(centroid.x, centroid.y);
 476                         showRotationCenter = true;
 477 //                      pt = GetAdjustedClientPosition(pts.GetX(ptHighlight), pts.GetY(ptHighlight));
 478                         Vector pt = Painter::CartesianToQtCoords(Vector(pts.GetX(ptHighlight), pts.GetY(ptHighlight)));
 479                         QCursor::setPos(mapToGlobal(QPoint(pt.x, pt.y)));
 480                         rotationZeroPoint = Vector(pts.GetX(ptHighlight), pts.GetY(ptHighlight));
 481                         haveZeroPoint = true;
 482                         rotationAngle = 0;
 483                         update();
 484                 }
 485                 else if (tool == TOOLFlipWinding)
 486                 {
 487                         pts.InvertPolyDrawSequence(pts.GetPolyForPointNumber(ptHighlight));
 488 //                      pt = GetAdjustedClientPosition(pts.GetX(ptHighlight), pts.GetY(ptHighlight));
 489                         Vector pt = Painter::CartesianToQtCoords(Vector(pts.GetX(ptHighlight), pts.GetY(ptHighlight)));
 490                         QCursor::setPos(mapToGlobal(QPoint(pt.x, pt.y)));
 491                         update();
 492                 }
 493         }
 494
 495         event->accept();
 496 }
 497
 498
 499 void EditWindow::mouseMoveEvent(QMouseEvent * event)
 500 {
 501         if (event->buttons() == Qt::RightButton)
 502         {
 503                 ToolType newTool = toolPalette->FindSelectedTool();
 504
 505                 if (newTool != toolPalette->prevTool)
 506                 {
 507                         toolPalette->prevTool = newTool;
 508                         toolPalette->repaint();
 509                 }
 510         }
 511         else if (event->buttons() == Qt::MidButton)
 512         {
 513                 // Calc offset from previous point
 514                 Vector pt(event->x(), event->y());
 515                 pt /= Global::zoom;
 516                 ptOffset = Vector(pt.x - ptPrevious.x, pt.y - ptPrevious.y);
 517
 518 // Then multiply it by the scaling factor. Whee!
 519                 // This looks wacky because we're using screen coords for the offset...
 520                 // Otherwise, we would subtract both offsets!
 521                 offsetX -= ptOffset.x, offsetY += ptOffset.y;
 522                 update();
 523                 ptPrevious = pt;
 524         }
 525         else if (event->buttons() == Qt::LeftButton)
 526         {
 527                 if (tool == TOOLAddPt || tool == TOOLAddPoly || tool == TOOLSelect)
 528                 {
 529                         // Bail out if we have the select tool and no points yet...
 530                         if (tool == TOOLSelect && pts.GetNumPoints() == 0)
 531                                 return;
 532
 533 //                      QPoint pt2 = GetAdjustedMousePosition(event);
 534                         Vector pt2 = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 535                         pts.SetXY(ptHighlight, pt2.x, pt2.y);
 536                         update();
 537                 }
 538                 else if (tool == TOOLPolySelect)
 539                 {
 540                         if (pts.GetNumPoints() > 0)
 541                         {
 542 //                              QPoint pt2 = GetAdjustedMousePosition(event);
 543                                 Vector pt2 = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 544                                 // Should also set onCurve here as well, depending on keystate
 545 //Or should we?
 546 //Would be nice, but we'd need to trap the keyPressEvent() as well, otherwise pressing/releasing
 547 //the hotkey would show no change until the user moved their mouse.
 548                                 pts.OffsetPoly(pts.GetPoly(ptHighlight), pt2.x - pts.GetX(ptHighlight), pt2.y - pts.GetY(ptHighlight));
 549                                 update();
 550                         }
 551                 }
 552                 else if (tool == TOOLRotate || tool == TOOLRotatePoly)
 553                 {
 554                         if (pts.GetNumPoints() > 0)
 555                         {
 556                                 if (!haveZeroPoint)
 557                                 {
 558 //                                      rotationZeroPoint = GetAdjustedMousePosition(event);
 559                                         rotationZeroPoint = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 560                                         haveZeroPoint = true;
 561                                 }
 562                                 else
 563                                 {
 564                                         // Figure out the angle between the "zero" vector and the current one,
 565                                         // then rotate all points relative to the "zero" vector (done by paint())
 566 //                                      QPoint currentPoint = GetAdjustedMousePosition(event);
 567                                         Vector currentPoint = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 568                                         Vector v1(rotationZeroPoint.x, rotationZeroPoint.y, 0,
 569                                                 rotationCenter.x, rotationCenter.y, 0);
 570                                         Vector v2(currentPoint.x, currentPoint.y, 0,
 571                                                 rotationCenter.x, rotationCenter.y, 0);
 572 //                                      rotationAngle = v1.Angle(v2);
 573                                         rotationAngle = v2.Angle(v1);
 574
 575                                         QString s;
 576                                         s.sprintf("%.3f degrees", rotationAngle * 180.0 / 3.14159265358979323);
 577                                         ((TTEdit *)qApp)->mainWindow->statusBar()->showMessage(s);
 578                                 }
 579
 580                                 update();
 581                         }
 582                 }
 583                 else if (tool == TOOLMultiSelect)
 584                 {
 585 //                      QPoint pt = GetAdjustedMousePosition(event);
 586                         Vector pt = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 587                         selection.setBottomRight(QPoint(pt.x, pt.y));
 588
 589                         for(int i=0; i<pts.GetNumPoints(); i++)
 590                         {
 591                                 if (selection.contains(QPoint(pts.GetX(i), pts.GetY(i))))
 592                                         selectedPoints[i] = true;
 593                                 else
 594                                         selectedPoints[i] = false;
 595                         }
 596
 597                         update();
 598                 }
 599         }
 600         else if (event->buttons() == Qt::NoButton)
 601         {
 602                 // Moving, not dragging...
 603                 if (tool == TOOLSelect || tool == TOOLDelPt || tool == TOOLAddPt
 604                         || tool == TOOLPolySelect || tool == TOOLRotatePoly || tool == TOOLFlipWinding)
 605                 {
 606 //                      QPoint pt2 = GetAdjustedMousePosition(event);
 607                         Vector pt2 = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
 608                         double closest = 1.0e+99;
 609
 610                         for(int i=0; i<pts.GetNumPoints(); i++)
 611                         {
 612                                 double dist = ((pt2.x - pts.GetX(i)) * (pt2.x - pts.GetX(i)))
 613                                         + ((pt2.y - pts.GetY(i)) * (pt2.y - pts.GetY(i)));
 614
 615                                 if (dist < closest)
 616                                         closest = dist, ptHighlight = i;
 617                         }
 618
 619                         if (ptHighlight != oldPtHighlight)
 620                         {
 621                                 oldPtHighlight = ptHighlight;
 622                                 update();
 623                         }
 624
 625                         // What follows here looks like voodoo, but is really simple. What
 626                         // we do is check to see if the mouse point has a perpendicular
 627                         // intersection with any of the line segments. If it does,
 628                         // calculate the length of the perpendicular and choose the
 629                         // smallest length. If there is no perpendicular, then choose the
 630                         // length of line connecting the closer of either the first
 631                         // endpoint or the second and choose the smallest of those.
 632
 633                         // There is one bit of math that looks like voodoo to me ATM--will
 634                         // explain once I understand it better (the calculation of the
 635                         // length of the perpendicular).
 636
 637                         if (pts.GetNumPoints() > 1 && tool == TOOLAddPt)
 638                         {
 639                                 double smallest = 1.0e+99;
 640
 641                                 for(int i=0; i<pts.GetNumPoints(); i++)
 642                                 {
 643                                         int32_t p1x = pts.GetX(i), p1y = pts.GetY(i),
 644                                                 p2x = pts.GetX(pts.GetNext(i)), p2y = pts.GetY(pts.GetNext(i));
 645
 646                                         Vector ls(p2x, p2y, 0, p1x, p1y, 0),
 647                                                 v1(pt2.x, pt2.y, 0, p1x, p1y, 0),
 648                                                 v2(pt2.x, pt2.y, 0, p2x, p2y, 0);
 649                                         double pp = ls.Dot(v1) / ls.Magnitude(), dist;
 650 // Geometric interpretation:
 651 // pp is the paremeterized point on the vector ls where the perpendicular
 652 // intersects ls. If pp < 0, then the perpendicular lies beyond the 1st
 653 // endpoint. If pp > length of ls, then the perpendicular lies beyond the 2nd
 654 // endpoint.
 655
 656                                         if (pp < 0.0)
 657                                                 dist = v1.Magnitude();
 658                                         else if (pp > ls.Magnitude())
 659                                                 dist = v2.Magnitude();
 660                                         else                                    // distance = ?Det?(ls, v1) / |ls|
 661                                                 dist = fabs((ls.x * v1.y - v1.x * ls.y) / ls.Magnitude());
 662
 663 //The answer to the above looks like it might be found here:
 664 //
 665 //If the segment endpoints are s and e, and the point is p, then the test for
 666 //the perpendicular intercepting the segment is equivalent to insisting that
 667 //the two dot products {s-e}.{s-p} and {e-s}.{e-p} are both non-negative.
 668 //Perpendicular distance from the point to the segment is computed by first
 669 //computing the area of the triangle the three points form, then dividing by
 670 //the length of the segment.  Distances are done just by the Pythagorean
 671 //theorem. Twice the area of the triangle formed by three points is the
 672 //determinant of the following matrix:
 673 //
 674 //sx sy 1
 675 //ex ey 1
 676 //px py 1
 677 //
 678 //By translating the start point to the origin, this can be rewritten as:
 679 //By subtracting row 1 from all rows, you get the following:
 680 //[because sx = sy = 0. you could leave out the -sx/y terms below. because we
 681 //subtracted row 1 from all rows (including row 1) row 1 turns out to be zero.
 682 //duh!]
 683 //
 684 //0         0         0
 685 //(ex - sx) (ey - sy) 0
 686 //(px - sx) (py - sy) 0
 687 //
 688 //which greatly simplifies the calculation of the determinant.
 689
 690                                         if (dist < smallest)
 691                                                 smallest = dist, ptNextHighlight = pts.GetNext(i), ptHighlight = i;
 692                                 }
 693
 694                                 if (ptNextHighlight != oldPtNextHighlight)
 695                                 {
 696                                         oldPtNextHighlight = ptNextHighlight;
 697                                         update();
 698                                 }
 699                         }
 700                 }
 701
 702                 ptPrevious = Vector(event->x(), event->y());
 703         }
 704
 705         event->accept();
 706 }
 707
 708
 709 void EditWindow::mouseReleaseEvent(QMouseEvent * event)
 710 {
 711         if (event->button() == Qt::RightButton)
 712         {
 713                 ToolType newTool = toolPalette->FindSelectedTool();
 714
 715                 // We only change the tool if a new one was actually selected. Otherwise, we do nothing.
 716                 if (newTool != TOOLNone)
 717                 {
 718                         tool = newTool;
 719
 720                         if (tool == TOOLScroll || tool == TOOLZoom || tool == TOOLAddPoly
 721                                 || tool == TOOLDelPoly)
 722                                 ptHighlight = -1;
 723
 724                         if (tool == TOOLAddPoly)
 725                                 polyFirstPoint = true;
 726                 }
 727
 728                 toolPalette->setVisible(false);
 729                 setCursor(cur[tool]);
 730                 // Just in case we changed highlighting style with the new tool...
 731                 update();
 732         }
 733         else if (event->button() == Qt::MidButton)
 734         {
 735                 setCursor(cur[tool]);                                           // Restore previous cursor
 736         }
 737         else if (event->button() == Qt::LeftButton)
 738         {
 739                 if (showRotationCenter)
 740                 {
 741                         showRotationCenter = false;
 742                         haveZeroPoint = false;
 743
 744                         if (tool == TOOLRotate)
 745                                 pts.RotatePoints(rotationAngle, IPoint(rotationCenter.x, rotationCenter.y));
 746                         else
 747                         {
 748                                 uint16_t poly = pts.GetPolyForPointNumber(ptHighlight);
 749                                 pts.RotatePolyAroundCentroid(poly, rotationAngle);
 750                         }
 751
 752                         update();
 753                         ((TTEdit *)qApp)->mainWindow->statusBar()->showMessage("");
 754                 }
 755
 756 //              if (tool == TOOLScroll || tool == TOOLZoom)
 757 //                      ReleaseMouse();
 758 //this is prolly too much
 759                 ((TTEdit *)qApp)->charWnd->MakePathFromPoints(&pts);
 760                 ((TTEdit *)qApp)->charWnd->update();
 761
 762                 if (tool == TOOLMultiSelect)
 763                 {
 764                         selectionInProgress = false;
 765                         update();
 766                 }
 767         }
 768
 769         event->accept();
 770 }
 771
 772
 773 void EditWindow::keyPressEvent(QKeyEvent * event)
 774 {
 775         // Sanity checking...
 776         if (ptHighlight == -1)
 777                 return;
 778
 779         if (event->key() == Qt::Key_Up)
 780         {
 781                 pts.SetXY(ptHighlight, pts.GetX(ptHighlight), pts.GetY(ptHighlight) + 1);
 782         }
 783         else if (event->key() == Qt::Key_Down)
 784                 pts.SetXY(ptHighlight, pts.GetX(ptHighlight), pts.GetY(ptHighlight) - 1);
 785         else if (event->key() == Qt::Key_Right)
 786                 pts.SetXY(ptHighlight, pts.GetX(ptHighlight) + 1, pts.GetY(ptHighlight));
 787         else if (event->key() == Qt::Key_Left)
 788                 pts.SetXY(ptHighlight, pts.GetX(ptHighlight) - 1, pts.GetY(ptHighlight));
 789         else
 790                 return;
 791
 792         event->accept();
 793         update();
 794         ((TTEdit *)qApp)->charWnd->MakePathFromPoints(&pts);
 795         ((TTEdit *)qApp)->charWnd->update();
 796 }
 797
 798
 799 void EditWindow::keyReleaseEvent(QKeyEvent * /*event*/)
 800 {
 801 }
 802