Shamusworld >> Repos - architektonas/blob - src/base/rs_grid.cpp

   1 // rs_grid.cpp
   2 //
   3 // Part of the Architektonas Project
   4 // Originally part of QCad Community Edition by Andrew Mustun
   5 // Extensively rewritten and refactored by James L. Hammons
   6 // (C) 2010 Underground Software
   7 //
   8 // JLH = James L. Hammons <jlhamm@acm.org>
   9 //
  10 // Who  When        What
  11 // ---  ----------  -----------------------------------------------------------
  12 // JLH  05/21/2010  Added this text. :-)
  13 //
  14
  15 #include "rs_grid.h"
  16
  17 #include "rs_units.h"
  18 #include "drawing.h"
  19 #include "settings.h"
  20
  21 /**
  22  * Constructor.
  23  */
  24 RS_Grid::RS_Grid(RS_GraphicView * gv): graphicView(gv), pt(NULL), number(0),
  25         metaX(NULL), numMetaX(0), metaY(NULL), numMetaY(0)
  26 {
  27 }
  28
  29 /**
  30  * Destructor.
  31  */
  32 RS_Grid::~RS_Grid()
  33 {
  34         if (pt != NULL)
  35                 delete[] pt;
  36
  37         if (metaX != NULL)
  38                 delete[] metaX;
  39
  40         if (metaY != NULL)
  41                 delete[] metaY;
  42 }
  43
  44 /**
  45  * Updates the grid point array.
  46  */
  47 void RS_Grid::update()
  48 {
  49         RS_DEBUG->print("RS_Grid::update");
  50
  51         if (!graphicView->isGridOn())
  52                 return;
  53
  54         Drawing * graphic = graphicView->getGraphic();
  55
  56         // auto scale grid?
  57         settings.beginGroup("Appearance");
  58         bool scaleGrid = settings.value("ScaleGrid", true).toBool();
  59         int minGridSpacing = settings.value("MinGridSpacing", 10).toInt();
  60         settings.endGroup();
  61
  62         // get grid setting
  63         Vector userGrid;
  64
  65         if (graphic != NULL)
  66                 userGrid = graphic->getVariableVector("$GRIDUNIT", Vector(-1.0, -1.0));
  67
  68         // delete old grid:
  69         if (pt != NULL)
  70         {
  71                 delete[] pt;
  72                 pt = NULL;
  73         }
  74
  75         if (metaX != NULL)
  76         {
  77                 delete[] metaX;
  78                 metaX = NULL;
  79         }
  80
  81         if (metaY != NULL)
  82         {
  83                 delete[] metaY;
  84                 metaY = NULL;
  85         }
  86
  87         number = 0;
  88         numMetaX = 0;
  89         numMetaY = 0;
  90
  91         RS_DEBUG->print("RS_Grid::update: 001");
  92
  93         // find out unit:
  94         RS2::Unit unit = RS2::None;
  95         RS2::LinearFormat format = RS2::Decimal;
  96
  97         if (graphic != NULL)
  98         {
  99                 unit = graphic->getUnit();
 100                 format = graphic->getLinearFormat();
 101         }
 102
 103         Vector gridWidth;
 104         Vector metaGridWidth;
 105
 106         RS_DEBUG->print("RS_Grid::update: 002");
 107
 108         // init grid spacing:
 109         // metric grid:
 110         if (RS_Units::isMetric(unit) || unit == RS2::None
 111                 || format == RS2::Decimal || format == RS2::Engineering)
 112         {
 113                 if (userGrid.x > 0.0)
 114                         gridWidth.x = userGrid.x;
 115                 else
 116                         gridWidth.x = 0.000001;
 117
 118                 if (userGrid.y > 0.0)
 119                         gridWidth.y = userGrid.y;
 120                 else
 121                         gridWidth.y = 0.000001;
 122
 123                 RS_DEBUG->print("RS_Grid::update: 003");
 124
 125                 // auto scale grid
 126                 if (scaleGrid)
 127                 {
 128                         while (graphicView->toGuiDX(gridWidth.x) < minGridSpacing)
 129                                 gridWidth.x *= 10;
 130
 131                         while (graphicView->toGuiDY(gridWidth.y) < minGridSpacing)
 132                                 gridWidth.y *= 10;
 133                 }
 134
 135                 metaGridWidth.x = gridWidth.x * 10;
 136                 metaGridWidth.y = gridWidth.y * 10;
 137
 138                 RS_DEBUG->print("RS_Grid::update: 004");
 139         }
 140         // imperial grid:
 141         else
 142         {
 143                 RS_DEBUG->print("RS_Grid::update: 005");
 144
 145                 if (userGrid.x > 0.0)
 146                         gridWidth.x = userGrid.x;
 147                 else
 148                         gridWidth.x = 1.0 / 1024.0;
 149
 150                 if (userGrid.y > 0.0)
 151                         gridWidth.y = userGrid.y;
 152                 else
 153                         gridWidth.y = 1.0 / 1024.0;
 154
 155                 RS_DEBUG->print("RS_Grid::update: 006");
 156
 157                 if (unit == RS2::Inch)
 158                 {
 159                         RS_DEBUG->print("RS_Grid::update: 007");
 160
 161                         // auto scale grid
 162                         if (scaleGrid)
 163                         {
 164                                 while (graphicView->toGuiDX(gridWidth.x) < minGridSpacing)
 165                                 {
 166                                         if (RS_Math::round(gridWidth.x) >= 36)
 167                                         {
 168                                                 gridWidth.x *= 2;
 169                                         }
 170                                         else if (RS_Math::round(gridWidth.x) >= 12)
 171                                         {
 172                                                 gridWidth.x *= 3;
 173                                         }
 174                                         else if (RS_Math::round(gridWidth.x) >= 4)
 175                                         {
 176                                                 gridWidth.x *= 3;
 177                                         }
 178                                         else if (RS_Math::round(gridWidth.x) >= 1)
 179                                         {
 180                                                 gridWidth.x *= 2;
 181                                         }
 182                                         else
 183                                         {
 184                                                 gridWidth.x*=2;
 185                                         }
 186                                 }
 187
 188                                 while (graphicView->toGuiDY(gridWidth.y) < minGridSpacing)
 189                                 {
 190                                         if (RS_Math::round(gridWidth.y) >= 36)
 191                                         {
 192                                                 gridWidth.y *= 2;
 193                                         }
 194                                         else if (RS_Math::round(gridWidth.y) >= 12)
 195                                         {
 196                                                 gridWidth.y *= 3;
 197                                         }
 198                                         else if (RS_Math::round(gridWidth.y) >= 4)
 199                                         {
 200                                                 gridWidth.y *= 3;
 201                                         }
 202                                         else if (RS_Math::round(gridWidth.y) >= 1)
 203                                         {
 204                                                 gridWidth.y *= 2;
 205                                         }
 206                                         else
 207                                         {
 208                                                 gridWidth.y *= 2;
 209                                         }
 210                                 }
 211                         }
 212
 213                         RS_DEBUG->print("RS_Grid::update: 008");
 214
 215                         // metagrid X shows inches..
 216                         metaGridWidth.x = 1.0;
 217
 218                         if (graphicView->toGuiDX(metaGridWidth.x) < minGridSpacing * 2)
 219                         {
 220                                 // .. or feet
 221                                 metaGridWidth.x = 12.0;
 222
 223                                 // .. or yards
 224                                 if (graphicView->toGuiDX(metaGridWidth.x) < minGridSpacing * 2)
 225                                 {
 226                                         metaGridWidth.x = 36.0;
 227
 228                                         // .. or miles (not really..)
 229                                         //if (graphicView->toGuiDX(metaGridWidth.x)<20) {
 230                                         //    metaGridWidth.x = 63360.0;
 231                                         //}
 232
 233                                         // .. or nothing
 234                                         if (graphicView->toGuiDX(metaGridWidth.x) < minGridSpacing * 2)
 235                                                 metaGridWidth.x = -1.0;
 236
 237                                 }
 238                         }
 239
 240                         RS_DEBUG->print("RS_Grid::update: 009");
 241
 242                         // metagrid Y shows inches..
 243                         metaGridWidth.y = 1.0;
 244
 245                         if (graphicView->toGuiDY(metaGridWidth.y) < minGridSpacing * 2)
 246                         {
 247                                 // .. or feet
 248                                 metaGridWidth.y = 12.0;
 249
 250                                 // .. or yards
 251                                 if (graphicView->toGuiDY(metaGridWidth.y) < minGridSpacing * 2)
 252                                 {
 253                                         metaGridWidth.y = 36.0;
 254
 255                                         // .. or miles (not really..)
 256                                         //if (graphicView->toGuiDY(metaGridWidth.y)<20) {
 257                                         //    metaGridWidth.y = 63360.0;
 258                                         //}
 259
 260                                         // .. or nothing
 261                                         if (graphicView->toGuiDY(metaGridWidth.y) < minGridSpacing * 2)
 262                                         {
 263                                                 metaGridWidth.y = -1.0;
 264                                         }
 265
 266                                 }
 267                         }
 268
 269                         RS_DEBUG->print("RS_Grid::update: 010");
 270                 }
 271                 else
 272                 {
 273                         RS_DEBUG->print("RS_Grid::update: 011");
 274
 275                         if (scaleGrid)
 276                         {
 277                                 while (graphicView->toGuiDX(gridWidth.x) < minGridSpacing)
 278                                 {
 279                                         gridWidth.x *= 2;
 280                                 }
 281
 282                                 metaGridWidth.x = -1.0;
 283
 284                                 while (graphicView->toGuiDY(gridWidth.y) < minGridSpacing)
 285                                 {
 286                                         gridWidth.y *= 2;
 287                                 }
 288
 289                                 metaGridWidth.y = -1.0;
 290                         }
 291                         RS_DEBUG->print("RS_Grid::update: 012");
 292                 }
 293                 //gridWidth.y = gridWidth.x;
 294                 //metaGridWidth.y = metaGridWidth.x;
 295         }
 296
 297         RS_DEBUG->print("RS_Grid::update: 013");
 298
 299         // for grid info:
 300         spacing = gridWidth.x;
 301         metaSpacing = metaGridWidth.x;
 302
 303         if (gridWidth.x > 1.0e-6 && gridWidth.y > 1.0e-6
 304                 && graphicView->toGuiDX(gridWidth.x) > 2
 305                 && graphicView->toGuiDY(gridWidth.y) > 2)
 306         {
 307                 // find grid boundaries
 308                 double left = (int)(graphicView->toGraphX(0) / gridWidth.x)
 309                         * gridWidth.x;
 310                 double right = (int)(graphicView->toGraphX(graphicView->getWidth())
 311                         / gridWidth.x) * gridWidth.x;
 312                 double top = (int)(graphicView->toGraphY(0)
 313                         / gridWidth.y) * gridWidth.y;
 314                 double bottom =
 315                         (int)(graphicView->toGraphY(graphicView->getHeight())
 316                         / gridWidth.y) * gridWidth.y;
 317
 318
 319                 left -= gridWidth.x;
 320                 right += gridWidth.x;
 321                 top += gridWidth.y;
 322                 bottom -= gridWidth.y;
 323
 324                 // calculate number of visible grid points
 325                 int numberX = (RS_Math::round((right-left) / gridWidth.x) + 1);
 326                 int numberY = (RS_Math::round((top-bottom) / gridWidth.y) + 1);
 327                 number = numberX * numberY;
 328
 329                 RS_DEBUG->print("RS_Grid::update: 014");
 330
 331                 // create grid array:
 332                 if (number > 0 && number < 1000000)
 333                 {
 334                         pt = new Vector[number];
 335
 336                         int i=0;
 337                         for(int y=0; y<numberY; ++y)
 338                         {
 339                                 for(int x=0; x<numberX; ++x)
 340                                 {
 341                                         pt[i++] = Vector(left + x * gridWidth.x, bottom + y * gridWidth.y);
 342                                 }
 343                         }
 344                 }
 345                 else
 346                 {
 347                         number = 0;
 348                         pt = NULL;
 349                 }
 350
 351                 RS_DEBUG->print("RS_Grid::update: 015");
 352         }
 353
 354         // find meta grid boundaries
 355         if (metaGridWidth.x > 1.0e-6 && metaGridWidth.y > 1.0e-6
 356                 && graphicView->toGuiDX(metaGridWidth.x) > 2
 357                 && graphicView->toGuiDY(metaGridWidth.y) > 2)
 358         {
 359                 double mleft = (int)(graphicView->toGraphX(0)
 360                         / metaGridWidth.x) * metaGridWidth.x;
 361                 double mright = (int)(graphicView->toGraphX(graphicView->getWidth())
 362                         / metaGridWidth.x) * metaGridWidth.x;
 363                 double mtop = (int)(graphicView->toGraphY(0)
 364                         / metaGridWidth.y) * metaGridWidth.y;
 365                 double mbottom = (int)(graphicView->toGraphY(graphicView->getHeight())
 366                         / metaGridWidth.y) * metaGridWidth.y;
 367
 368                 mleft -= metaGridWidth.x;
 369                 mright += metaGridWidth.x;
 370                 mtop += metaGridWidth.y;
 371                 mbottom -= metaGridWidth.y;
 372
 373                 // calculate number of visible meta grid lines:
 374                 numMetaX = (RS_Math::round((mright - mleft) / metaGridWidth.x) + 1);
 375                 numMetaY = (RS_Math::round((mtop - mbottom) / metaGridWidth.y) + 1);
 376
 377                 if (numMetaX > 0 && numMetaY > 0)
 378                 {
 379                         // create meta grid arrays:
 380                         metaX = new double[numMetaX];
 381                         metaY = new double[numMetaY];
 382
 383                         int i = 0;
 384
 385                         for(int x=0; x<numMetaX; ++x)
 386                                 metaX[i++] = mleft + x * metaGridWidth.x;
 387
 388                         i = 0;
 389
 390                         for(int y=0; y<numMetaY; ++y)
 391                                 metaY[i++] = mbottom + y * metaGridWidth.y;
 392                 }
 393                 else
 394                 {
 395                         numMetaX = 0;
 396                         metaX = NULL;
 397                         numMetaY = 0;
 398                         metaY = NULL;
 399                 }
 400         }
 401
 402         RS_DEBUG->print("RS_Grid::update: OK");
 403 }
 404
 405 /**
 406  * @return Array of all visible grid points.
 407  */
 408 Vector * RS_Grid::getPoints()
 409 {
 410         return pt;
 411 }
 412
 413 /**
 414  * @return Number of visible grid points.
 415  */
 416 int RS_Grid::count()
 417 {
 418         return number;
 419 }
 420
 421 /**
 422  * @return Grid info for status widget.
 423  */
 424 QString RS_Grid::getInfo()
 425 {
 426         return QString("%1 / %2").arg(spacing).arg(metaSpacing);
 427 }
 428
 429 /**
 430  * @return Meta grid positions in X.
 431  */
 432 double * RS_Grid::getMetaX()
 433 {
 434         return metaX;
 435 }
 436
 437 /**
 438  * @return Number of visible meta grid lines in X.
 439  */
 440 int RS_Grid::countMetaX()
 441 {
 442         return numMetaX;
 443 }
 444
 445 /**
 446 * @return Meta grid positions in Y.
 447 */
 448 double * RS_Grid::getMetaY()
 449 {
 450         return metaY;
 451 }
 452
 453 /**
 454 * @return Number of visible meta grid lines in Y.
 455 */
 456 int RS_Grid::countMetaY()
 457 {
 458         return numMetaY;
 459 }