kstars/kstars/skymapevents.cpp

   1 /***************************************************************************
   2                           skymapevents.cpp  -  K Desktop Planetarium
   3                              -------------------
   4     begin                : Sat Feb 10 2001
   5     copyright            : (C) 2001 by Jason Harris
   6     email                : jharris@30doradus.org
   7  ***************************************************************************/
   8
   9 /***************************************************************************
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 //This file contains Event handlers for the SkyMap class.
  19
  20 #include <stdlib.h>
  21 #include <math.h> //using fabs()
  22
  23 #include <qcursor.h>
  24 #include <qpainter.h>
  25 #include <qfile.h>
  26
  27 #include <kiconloader.h>
  28 #include <kstatusbar.h>
  29 #include <kshortcut.h> //KKey class
  30
  31 #include "skymap.h"
  32 #include "Options.h"
  33 #include "kstars.h"
  34 #include "kstarsdata.h"
  35 #include "ksutils.h"
  36 #include "simclock.h"
  37 #include "infoboxes.h"
  38 #include "ksfilereader.h"
  39 #include "kspopupmenu.h"
  40 #include "ksmoon.h"
  41
  42 void SkyMap::resizeEvent( QResizeEvent * )
  43 {
  44         computeSkymap = true; // skymap must be new computed
  45         if ( testWState(WState_AutoMask) ) updateMask();
  46
  47         // avoid phantom positions of infoboxes
  48         if ( ksw && ( isVisible() || width() == ksw->width() || height() == ksw->height() ) ) {
  49                 infoBoxes()->resize( width(), height() );
  50         }
  51         sky->resize( width(), height() );
  52 }
  53
  54 void SkyMap::keyPressEvent( QKeyEvent *e ) {
  55         QString s;
  56         bool arrowKeyPressed( false );
  57         bool shiftPressed( false );
  58         float step = 1.0;
  59         if ( e->state() & ShiftButton ) { step = 10.0; shiftPressed = true; }
  60
  61         //If the DCOP resume key was pressed, we process it here
  62         if ( ! data->resumeKey.isNull() && e->key() == data->resumeKey.keyCodeQt() ) {
  63                 //kdDebug() << "resumeKey pressed; resuming DCOP." << endl;
  64                 ksw->resumeDCOP();
  65                 return;
  66         }
  67
  68         switch ( e->key() ) {
  69                 case Key_Left :
  70                         if ( Options::useAltAz() ) {
  71                                 focus()->setAz( dms( focus()->az()->Degrees() - step * MINZOOM/Options::zoomFactor() ).reduce() );
  72                                 focus()->HorizontalToEquatorial( data->LST, data->geo()->lat() );
  73                         } else {
  74                                 focus()->setRA( focus()->ra()->Hours() + 0.05*step * MINZOOM/Options::zoomFactor() );
  75                                 focus()->EquatorialToHorizontal( data->LST, data->geo()->lat() );
  76                         }
  77
  78                         arrowKeyPressed = true;
  79                         slewing = true;
  80                         ++scrollCount;
  81                         break;
  82
  83                 case Key_Right :
  84                         if ( Options::useAltAz() ) {
  85                                 focus()->setAz( dms( focus()->az()->Degrees() + step * MINZOOM/Options::zoomFactor() ).reduce() );
  86                                 focus()->HorizontalToEquatorial( data->LST, data->geo()->lat() );
  87                         } else {
  88                                 focus()->setRA( focus()->ra()->Hours() - 0.05*step * MINZOOM/Options::zoomFactor() );
  89                                 focus()->EquatorialToHorizontal( data->LST, data->geo()->lat() );
  90                         }
  91
  92                         arrowKeyPressed = true;
  93                         slewing = true;
  94                         ++scrollCount;
  95                         break;
  96
  97                 case Key_Up :
  98                         if ( Options::useAltAz() ) {
  99                                 focus()->setAlt( focus()->alt()->Degrees() + step * MINZOOM/Options::zoomFactor() );
 100                                 if ( focus()->alt()->Degrees() > 90.0 ) focus()->setAlt( 90.0 );
 101                                 focus()->HorizontalToEquatorial( data->LST, data->geo()->lat() );
 102                         } else {
 103                                 focus()->setDec( focus()->dec()->Degrees() + step * MINZOOM/Options::zoomFactor() );
 104                                 if (focus()->dec()->Degrees() > 90.0) focus()->setDec( 90.0 );
 105                                 focus()->EquatorialToHorizontal( data->LST, data->geo()->lat() );
 106                         }
 107
 108                         arrowKeyPressed = true;
 109                         slewing = true;
 110                         ++scrollCount;
 111                         break;
 112
 113                 case Key_Down:
 114                         if ( Options::useAltAz() ) {
 115                                 focus()->setAlt( focus()->alt()->Degrees() - step * MINZOOM/Options::zoomFactor() );
 116                                 if ( focus()->alt()->Degrees() < -90.0 ) focus()->setAlt( -90.0 );
 117                                 focus()->HorizontalToEquatorial( data->LST, data->geo()->lat() );
 118                         } else {
 119                                 focus()->setDec( focus()->dec()->Degrees() - step * MINZOOM/Options::zoomFactor() );
 120                                 if (focus()->dec()->Degrees() < -90.0) focus()->setDec( -90.0 );
 121                                 focus()->EquatorialToHorizontal( data->LST, data->geo()->lat() );
 122                         }
 123
 124                         arrowKeyPressed = true;
 125                         slewing = true;
 126                         ++scrollCount;
 127                         break;
 128
 129                 case Key_Plus:   //Zoom in
 130                 case Key_Equal:
 131                         if ( ksw ) ksw->slotZoomIn();
 132                         break;
 133
 134                 case Key_Minus:  //Zoom out
 135                 case Key_Underscore:
 136                         if ( ksw ) ksw->slotZoomOut();
 137                         break;
 138
 139 //In the following cases, we set slewing=true in order to disengage tracking
 140                 case Key_N: //center on north horizon
 141                         stopTracking();
 142                         setDestinationAltAz( 15.0, 0.0001 );
 143                         break;
 144
 145                 case Key_E: //center on east horizon
 146                         stopTracking();
 147                         setDestinationAltAz( 15.0, 90.0 );
 148                         break;
 149
 150                 case Key_S: //center on south horizon
 151                         stopTracking();
 152                         setDestinationAltAz( 15.0, 180.0 );
 153                         break;
 154
 155                 case Key_W: //center on west horizon
 156                         stopTracking();
 157                         setDestinationAltAz( 15.0, 270.0 );
 158                         break;
 159
 160                 case Key_Z: //center on Zenith
 161                         stopTracking();
 162                         setDestinationAltAz( 90.0, focus()->az()->Degrees() );
 163                         break;
 164
 165                 case Key_0: //center on Sun
 166                         setClickedObject( data->PCat->findByName("Sun") );
 167                         setClickedPoint( clickedObject() );
 168                         slotCenter();
 169                         break;
 170
 171                 case Key_1: //center on Mercury
 172                         setClickedObject( data->PCat->findByName("Mercury") );
 173                         setClickedPoint( clickedObject() );
 174                         slotCenter();
 175                         break;
 176
 177                 case Key_2: //center on Venus
 178                         setClickedObject( data->PCat->findByName("Venus") );
 179                         setClickedPoint( clickedObject() );
 180                         slotCenter();
 181                         break;
 182
 183                 case Key_3: //center on Moon
 184                         setClickedObject( data->Moon );
 185                         setClickedPoint( clickedObject() );
 186                         slotCenter();
 187                         break;
 188
 189                 case Key_4: //center on Mars
 190                         setClickedObject( data->PCat->findByName("Mars") );
 191                         setClickedPoint( clickedObject() );
 192                         slotCenter();
 193                         break;
 194
 195                 case Key_5: //center on Jupiter
 196                         setClickedObject( data->PCat->findByName("Jupiter") );
 197                         setClickedPoint( clickedObject() );
 198                         slotCenter();
 199                         break;
 200
 201                 case Key_6: //center on Saturn
 202                         setClickedObject( data->PCat->findByName("Saturn") );
 203                         setClickedPoint( clickedObject() );
 204                         slotCenter();
 205                         break;
 206
 207                 case Key_7: //center on Uranus
 208                         setClickedObject( data->PCat->findByName("Uranus") );
 209                         setClickedPoint( clickedObject() );
 210                         slotCenter();
 211                         break;
 212
 213                 case Key_8: //center on Neptune
 214                         setClickedObject( data->PCat->findByName("Neptune") );
 215                         setClickedPoint( clickedObject() );
 216                         slotCenter();
 217                         break;
 218
 219                 case Key_9: //center on Pluto
 220                         setClickedObject( data->PCat->findByName("Pluto") );
 221                         setClickedPoint( clickedObject() );
 222                         slotCenter();
 223                         break;
 224
 225                 case Key_BracketLeft:   // Begin measuring angular distance
 226                         if ( !isAngleMode() ) {
 227                                 slotBeginAngularDistance();
 228                         }
 229
 230                         break;
 231
 232                 case Key_BracketRight:  // End measuring angular distance
 233                         if ( isAngleMode() ) {
 234                                 slotEndAngularDistance();
 235                         }
 236
 237                         break;
 238
 239                 case Key_Escape:        // Cancel angular distance measurement
 240                         if  (isAngleMode() ) {
 241                                 slotCancelAngularDistance();
 242                         }
 243                         break;
 244
 245                 case Key_Comma:  //advance one step backward in time
 246                 case Key_Less:
 247                         if ( data->clock()->isActive() ) data->clock()->stop();
 248                         data->clock()->setScale( -1.0 * data->clock()->scale() ); //temporarily need negative time step
 249                         data->clock()->manualTick( true );
 250                         data->clock()->setScale( -1.0 * data->clock()->scale() ); //reset original sign of time step
 251                         update();
 252                         kapp->processEvents();
 253                         break;
 254
 255                 case Key_Period: //advance one step forward in time
 256                 case Key_Greater:
 257                         if ( data->clock()->isActive() ) data->clock()->stop();
 258                         data->clock()->manualTick( true );
 259                         update();
 260                         kapp->processEvents();
 261                         break;
 262
 263                         //FIXME: Uncomment after feature thaw!
 264 //              case Key_C: //Center clicked object object
 265 //                      if ( clickedObject() ) slotCenter();
 266 //                      break;
 267
 268                 case Key_D: //Details window for Clicked/Centered object
 269                         if ( shiftPressed ) setClickedObject( focusObject() );
 270                         if ( clickedObject() ) slotDetail();
 271                         break;
 272
 273                 case Key_P: //Show Popup menu for Clicked/Centered object
 274                         if ( shiftPressed ) setClickedObject( focusObject() );
 275                         if ( clickedObject() )
 276                                 clickedObject()->showPopupMenu( pmenu, QCursor::pos() );
 277                         break;
 278
 279                 case Key_O: //Add object to Observing List
 280                         if ( shiftPressed ) setClickedObject( focusObject() );
 281                         if ( clickedObject() )
 282                                 ksw->observingList()->slotAddObject();
 283                         break;
 284
 285                 case Key_L: //Toggle User label on Clicked/Centered object
 286                         if ( shiftPressed ) setClickedObject( focusObject() );
 287                         if ( clickedObject() ) {
 288                                 if ( isObjectLabeled( clickedObject() ) )
 289                                         slotRemoveObjectLabel();
 290                                 else
 291                                         slotAddObjectLabel();
 292                         }
 293                         break;
 294
 295                 case Key_T: //Toggle planet trail on Clicked/Centered object (if solsys)
 296                         if ( shiftPressed ) setClickedObject( focusObject() );
 297                         if ( clickedObject() && clickedObject()->isSolarSystem() ) {
 298                                 if ( ((KSPlanetBase*)clickedObject())->hasTrail() )
 299                                         slotRemovePlanetTrail();
 300                                 else
 301                                         slotAddPlanetTrail();
 302                         }
 303                         break;
 304
 305
 306
 307 //TIMING
 308 /*
 309                 case Key_G: //loop through all cities
 310                 {
 311
 312       QFile file;
 313         if ( KSUtils::openDataFile( file, "Cities.dat" ) ) {
 314         KSFileReader fileReader( file );
 315         int nCount = 0;
 316         while (fileReader.hasMoreLines()) {
 317           QString line = fileReader.readLine();
 318           nCount++;
 319                         kdDebug() << "Line " << nCount << " : " << line;
 320         }
 321       }
 322
 323                         QTime t1;
 324                         t1.start();
 325       for (int i=0;i<10;i++) {
 326         if ( KSUtils::openDataFile( file, "Cities.dat" ) ) {
 327           QString sAll( file.readAll() );
 328           QStringList lines = QStringList::split( "\n", sAll );
 329           int nSize = lines.size();
 330           for ( int i=0; i<nSize; i++ ) {
 331             QString& line = lines[i];
 332           }
 333                 file.close();
 334         }
 335       }
 336                         kdDebug() << "time taken for reading city data via read all (10 times): (msec): " << t1.elapsed() << endl;
 337
 338                         QTime t2;
 339                         t2.start();
 340       for (int i=0;i<10;i++) {
 341         if ( KSUtils::openDataFile( file, "Cities.dat" ) ) {
 342                 QTextStream stream( &file );
 343                 while ( !stream.eof() ) {
 344                         QString line = stream.readLine();
 345                 }
 346                 file.close();
 347         }
 348       }
 349                         kdDebug() << "time taken for reading city data old code (10 times): (msec): " << t2.elapsed() << endl;
 350
 351                         QTime t3;
 352                         t3.start();
 353       for (int i=0;i<1;i++) {
 354         if ( KSUtils::openDataFile( file, "ngcic.dat" ) ) {
 355           QString sAll( file.readAll() );
 356           QStringList lines = QStringList::split( "\n", sAll );
 357           int nSize = lines.size();
 358           for ( int i=0; i<nSize; i++ ) {
 359             QString& line = lines[i];
 360           }
 361                 file.close();
 362         }
 363       }
 364                         kdDebug() << "time taken for reading deep sky data via read all (1 times): (msec): " << t3.elapsed() << endl;
 365
 366                         QTime t4;
 367                         t4.start();
 368       for (int i=0;i<1;i++) {
 369         if ( KSUtils::openDataFile( file, "ngcic.dat" ) ) {
 370                 QTextStream stream( &file );
 371                 while ( !stream.eof() ) {
 372                         QString line = stream.readLine();
 373                 }
 374                 file.close();
 375         }
 376       }
 377                         kdDebug() << "time taken for reading deep sky data old code  (1 times): (msec): " << t4.elapsed() << endl;
 378
 379                         break;
 380                 }
 381 */
 382
 383 //END_TIMING
 384         }
 385
 386         setOldFocus( focus() );
 387         oldfocus()->setAz( focus()->az()->Degrees() );
 388         oldfocus()->setAlt( focus()->alt()->Degrees() );
 389
 390         double dHA = data->LST->Hours() - focus()->ra()->Hours();
 391         while ( dHA < 0.0 ) dHA += 24.0;
 392         data->HourAngle->setH( dHA );
 393
 394         if ( arrowKeyPressed ) {
 395                 infoBoxes()->focusObjChanged( i18n( "nothing" ) );
 396                 stopTracking();
 397
 398                 if ( scrollCount > 10 ) {
 399                         setDestination( focus() );
 400                         scrollCount = 0;
 401                 }
 402         }
 403
 404         forceUpdate(); //need a total update, or slewing with the arrow keys doesn't work.
 405 }
 406
 407 void SkyMap::stopTracking() {
 408         if ( ksw && Options::isTracking() ) ksw->slotTrack();
 409 }
 410
 411 void SkyMap::keyReleaseEvent( QKeyEvent *e ) {
 412         switch ( e->key() ) {
 413                 case Key_Left :  //no break; continue to Key_Down
 414                 case Key_Right :  //no break; continue to Key_Down
 415                 case Key_Up :  //no break; continue to Key_Down
 416                 case Key_Down :
 417                         slewing = false;
 418                         scrollCount = 0;
 419
 420                         if ( Options::useAltAz() )
 421                                 setDestinationAltAz( focus()->alt()->Degrees(), focus()->az()->Degrees() );
 422                         else
 423                                 setDestination( focus() );
 424
 425                         showFocusCoords();
 426                         forceUpdate();  // Need a full update to draw faint objects that are not drawn while slewing.
 427                         break;
 428         }
 429 }
 430
 431 void SkyMap::mouseMoveEvent( QMouseEvent *e ) {
 432         if ( Options::useHoverLabel() ) {
 433                 //First of all, if the transientObject() pointer is not NULL, then
 434                 //we just moved off of a hovered object.  Begin fading the label.
 435                 if ( transientObject() && ! TransientTimer.isActive() ) {
 436                         fadeTransientLabel();
 437                 }
 438
 439                 //Start a single-shot timer to monitor whether we are currently hovering.
 440                 //The idea is that whenever a moveEvent occurs, the timer is reset.  It
 441                 //will only timeout if there are no move events for HOVER_INTERVAL ms
 442                 HoverTimer.start( HOVER_INTERVAL, true );
 443         }
 444
 445         //Are we dragging an infoBox?
 446         if ( infoBoxes()->dragBox( e ) ) {
 447                 update();
 448                 return;
 449         }
 450
 451         //Are we defining a ZoomRect?
 452         if ( ZoomRect.center().x() > 0 && ZoomRect.center().y() > 0 ) {
 453                 //cancel operation if the user let go of CTRL
 454                 if ( !( e->state() & ControlButton ) ) {
 455                         ZoomRect = QRect(); //invalidate ZoomRect
 456                         update();
 457                 } else {
 458                         //Resize the rectangle so that it passes through the cursor position
 459                         QPoint pcenter = ZoomRect.center();
 460                         int dx = abs(e->x() - pcenter.x());
 461                         int dy = abs(e->y() - pcenter.y());
 462                         if ( dx == 0 || float(dy)/float(dx) > float(height())/float(width()) ) {
 463                                 //Size rect by height
 464                                 ZoomRect.setHeight( 2*dy );
 465                                 ZoomRect.setWidth( 2*dy*width()/height() );
 466                         } else {
 467                                 //Size rect by height
 468                                 ZoomRect.setWidth( 2*dx );
 469                                 ZoomRect.setHeight( 2*dx*height()/width() );
 470                         }
 471                         ZoomRect.moveCenter( pcenter ); //reset center
 472
 473                         update();
 474                         return;
 475                 }
 476         }
 477
 478         double dx = ( 0.5*width()  - e->x() )/Options::zoomFactor();
 479         double dy = ( 0.5*height() - e->y() )/Options::zoomFactor();
 480         double dyPix = 0.5*height() - e->y();
 481
 482         if (unusablePoint (dx, dy)) return;     // break if point is unusable
 483
 484         //determine RA, Dec of mouse pointer
 485         setMousePoint( dXdYToRaDec( dx, dy, Options::useAltAz(), data->LST, data->geo()->lat(), Options::useRefraction() ) );
 486         mousePoint()->EquatorialToHorizontal( data->LST, data->geo()->lat() );
 487
 488
 489         if ( midMouseButtonDown ) { //zoom according to y-offset
 490                 float yoff = dyPix - y0;
 491
 492                 if (yoff > 10 ) {
 493                         y0 = dyPix;
 494                         if ( ksw ) ksw->slotZoomIn();
 495                 }
 496                 if (yoff < -10 ) {
 497                         y0 = dyPix;
 498                         if ( ksw ) ksw->slotZoomOut();
 499                 }
 500         }
 501
 502         if ( mouseButtonDown ) {
 503                 // set the mouseMoveCursor and set slewing=true, if they are not set yet
 504                 if (!mouseMoveCursor) setMouseMoveCursor();
 505                 if (!slewing) {
 506                         slewing = true;
 507                         infoBoxes()->focusObjChanged( i18n( "nothing" ) );
 508                         if ( ksw && Options::isTracking() ) ksw->slotTrack(); //toggle tracking off
 509                 }
 510
 511                 //Update focus such that the sky coords at mouse cursor remain approximately constant
 512                 if ( Options::useAltAz() ) {
 513                         mousePoint()->EquatorialToHorizontal( data->LST, data->geo()->lat() );
 514                         clickedPoint()->EquatorialToHorizontal( data->LST, data->geo()->lat() );
 515                         dms dAz = mousePoint()->az()->Degrees() - clickedPoint()->az()->Degrees();
 516                         dms dAlt = mousePoint()->alt()->Degrees() - clickedPoint()->alt()->Degrees();
 517                         focus()->setAz( focus()->az()->Degrees() - dAz.Degrees() ); //move focus in opposite direction
 518                         focus()->setAlt( focus()->alt()->Degrees() - dAlt.Degrees() );
 519
 520                         if ( focus()->alt()->Degrees() >90.0 ) focus()->setAlt( 90.0 );
 521                         if ( focus()->alt()->Degrees() <-90.0 ) focus()->setAlt( -90.0 );
 522                         focus()->setAz( focus()->az()->reduce() );
 523                         focus()->HorizontalToEquatorial( data->LST, data->geo()->lat() );
 524                 } else {
 525                         dms dRA = mousePoint()->ra()->Degrees() - clickedPoint()->ra()->Degrees();
 526                         dms dDec = mousePoint()->dec()->Degrees() - clickedPoint()->dec()->Degrees();
 527                         focus()->setRA( focus()->ra()->Hours() - dRA.Hours() ); //move focus in opposite direction
 528                         focus()->setDec( focus()->dec()->Degrees() - dDec.Degrees() );
 529
 530                         if ( focus()->dec()->Degrees() >90.0 ) focus()->setDec( 90.0 );
 531                         if ( focus()->dec()->Degrees() <-90.0 ) focus()->setDec( -90.0 );
 532                         focus()->setRA( focus()->ra()->reduce() );
 533                         focus()->EquatorialToHorizontal( data->LST, data->geo()->lat() );
 534                 }
 535
 536                 ++scrollCount;
 537                 if ( scrollCount > 4 ) {
 538                         showFocusCoords();
 539                         scrollCount = 0;
 540                 }
 541
 542                 setOldFocus( focus() );
 543
 544                 double dHA = data->LST->Hours() - focus()->ra()->Hours();
 545                 while ( dHA < 0.0 ) dHA += 24.0;
 546                 data->HourAngle->setH( dHA );
 547
 548                 //redetermine RA, Dec of mouse pointer, using new focus
 549                 setMousePoint( dXdYToRaDec( dx, dy, Options::useAltAz(), data->LST, data->geo()->lat(), Options::useRefraction() ) );
 550                 setClickedPoint( mousePoint() );
 551
 552                 forceUpdate();  // must be new computed
 553         } else {
 554
 555                 if ( ksw ) {
 556                         QString sX, sY, s;
 557                         sX = mousePoint()->az()->toDMSString(true);  //true = force +/- symbol
 558                         sY = mousePoint()->alt()->toDMSString(true); //true = force +/- symbol
 559                         s = sX + ",  " + sY;
 560                         ksw->statusBar()->changeItem( s, 1 );
 561
 562                         sX = mousePoint()->ra()->toHMSString();
 563                         sY = mousePoint()->dec()->toDMSString(true); //true = force +/- symbol
 564                         s = sX + ",  " + sY;
 565                         ksw->statusBar()->changeItem( s, 2 );
 566                 }
 567         }
 568 }
 569
 570 void SkyMap::wheelEvent( QWheelEvent *e ) {
 571         if ( ksw && e->delta() > 0 ) ksw->slotZoomIn();
 572         else if ( ksw ) ksw->slotZoomOut();
 573 }
 574
 575 void SkyMap::mouseReleaseEvent( QMouseEvent * ) {
 576         if ( infoBoxes()->unGrabBox() ) {
 577                 update();
 578                 return;
 579         }
 580
 581         if ( ZoomRect.isValid() ) {
 582                 //Zoom in on center of Zoom Circle, by a factor equal to the ratio
 583                 //of the sky pixmap's width to the Zoom Circle's diameter
 584                 float factor = float(width()) / float(ZoomRect.width());
 585
 586                 double dx = ( 0.5*width()  - ZoomRect.center().x() )/Options::zoomFactor();
 587                 double dy = ( 0.5*height() - ZoomRect.center().y() )/Options::zoomFactor();
 588
 589                 SkyPoint newcenter = dXdYToRaDec( dx, dy, Options::useAltAz(), data->LST, data->geo()->lat(), Options::useRefraction() );
 590                 setClickedPoint( &newcenter );
 591                 setClickedObject( NULL );
 592                 setFocusObject( NULL );
 593                 setFocus( &newcenter );
 594                 setDestination( &newcenter );
 595                 setOldFocus( &newcenter );
 596                 ksw->zoom( Options::zoomFactor() * factor );
 597
 598                 setDefaultMouseCursor();
 599                 ZoomRect = QRect(); //invalidate ZoomRect
 600                 forceUpdate();
 601         } else {
 602                 setDefaultMouseCursor();
 603                 ZoomRect = QRect(); //just in case user Ctrl+clicked + released w/o dragging...
 604         }
 605
 606         if (mouseMoveCursor) setDefaultMouseCursor();   // set default cursor
 607         if (mouseButtonDown) { //false if double-clicked, because it's unset there.
 608                 mouseButtonDown = false;
 609                 if ( slewing ) {
 610                         slewing = false;
 611
 612                         if ( Options::useAltAz() )
 613                                 setDestinationAltAz( focus()->alt()->Degrees(), focus()->az()->Degrees() );
 614                         else
 615                                 setDestination( focus() );
 616                 }
 617
 618                 setOldFocus( focus() );
 619                 forceUpdate();  // is needed because after moving the sky not all stars are shown
 620         }
 621         if ( midMouseButtonDown ) midMouseButtonDown = false;  // if middle button was pressed unset here
 622
 623         scrollCount = 0;
 624 }
 625
 626 void SkyMap::mousePressEvent( QMouseEvent *e ) {
 627         //did we Grab an infoBox?
 628         if ( e->button() == LeftButton && infoBoxes()->grabBox( e ) ) {
 629                 update(); //refresh without redrawing skymap
 630                 return;
 631         }
 632
 633         if ( (e->state() & ControlButton) && (e->button() == LeftButton) ) {
 634                 ZoomRect.moveCenter( e->pos() );
 635                 setZoomMouseCursor();
 636                 update(); //refresh without redrawing skymap
 637                 return;
 638         }
 639
 640         // if button is down and cursor is not moved set the move cursor after 500 ms
 641         QTimer t;
 642         t.singleShot (500, this, SLOT (setMouseMoveCursor()));
 643
 644         double dx = ( 0.5*width()  - e->x() )/Options::zoomFactor();
 645         double dy = ( 0.5*height() - e->y() )/Options::zoomFactor();
 646         if (unusablePoint (dx, dy)) return;     // break if point is unusable
 647
 648         if ( !midMouseButtonDown && e->button() == MidButton ) {
 649                 y0 = 0.5*height() - e->y();  //record y pixel coordinate for middle-button zooming
 650                 midMouseButtonDown = true;
 651         }
 652
 653         if ( !mouseButtonDown ) {
 654                 if ( e->button()==LeftButton ) {
 655                         mouseButtonDown = true;
 656                         scrollCount = 0;
 657                 }
 658
 659                 //determine RA, Dec of mouse pointer
 660                 setMousePoint( dXdYToRaDec( dx, dy, Options::useAltAz(),
 661                                 data->LST, data->geo()->lat(), Options::useRefraction() ) );
 662                 setClickedPoint( mousePoint() );
 663
 664                 //Find object nearest to clickedPoint()
 665                 setClickedObject( objectNearest( clickedPoint() ) );
 666
 667                 if ( clickedObject() ) {
 668                         setClickedPoint( clickedObject() );
 669
 670                         if ( e->button() == RightButton ) {
 671                                 clickedObject()->showPopupMenu( pmenu, QCursor::pos() );
 672                         }
 673
 674                         if ( ksw && e->button() == LeftButton ) {
 675                                 ksw->statusBar()->changeItem( clickedObject()->translatedLongName(), 0 );
 676                         }
 677                 } else {
 678                         //Empty sky selected.  If left-click, display "nothing" in the status bar.
 679             //If right-click, open "empty" popup menu.
 680                         setClickedObject( NULL );
 681
 682                         switch (e->button()) {
 683                                 case LeftButton:
 684                                         if ( ksw ) ksw->statusBar()->changeItem( i18n( "Empty sky" ), 0 );
 685                                         break;
 686                                 case RightButton:
 687                                 {
 688                                         SkyObject *nullObj = new SkyObject( SkyObject::TYPE_UNKNOWN, clickedPoint()->ra()->Hours(), clickedPoint()->dec()->Degrees() );
 689                                         pmenu->createEmptyMenu( nullObj );
 690                                         delete nullObj;
 691
 692                                         pmenu->popup(  QCursor::pos() );
 693                                         break;
 694                                 }
 695
 696                                 default:
 697                                         break;
 698                         }
 699                 }
 700         }
 701 }
 702
 703 void SkyMap::mouseDoubleClickEvent( QMouseEvent *e ) {
 704         //Was the event inside an infoBox?  If so, shade the box.
 705         if ( e->button() == LeftButton ) {
 706                 if ( infoBoxes()->shadeBox( e ) ) {
 707                         update();
 708                         return;
 709                 }
 710
 711                 double dx = ( 0.5*width()  - e->x() )/Options::zoomFactor();
 712                 double dy = ( 0.5*height() - e->y() )/Options::zoomFactor();
 713                 if (unusablePoint (dx, dy)) return;     // break if point is unusable
 714
 715                 if (mouseButtonDown ) mouseButtonDown = false;
 716                 if ( dx != 0.0 || dy != 0.0 )  slotCenter();
 717         }
 718 }
 719
 720 void SkyMap::paintEvent( QPaintEvent * )
 721 {
 722         //If computeSkymap is false, then we just refresh the window using the stored sky pixmap
 723         //and draw the "overlays" on top.  This lets us update the overlay information rapidly
 724         //without needing to recompute the entire skymap.
 725         //use update() to trigger this "short" paint event; to force a full "recompute"
 726         //of the skymap, use forceUpdate().
 727         if (!computeSkymap)
 728         {
 729                 QPixmap *sky2 = new QPixmap( *sky );
 730                 drawOverlays( sky2 );
 731                 bitBlt( this, 0, 0, sky2 );
 732                 delete sky2;
 733                 return ; // exit because the pixmap is repainted and that's all what we want
 734         }
 735
 736         QPainter psky;
 737         setMapGeometry();
 738
 739         //checkSlewing combines the slewing flag (which is true when the display is actually in motion),
 740         //the hideOnSlew option (which is true if slewing should hide objects),
 741         //and clockSlewing (which is true if the timescale exceeds Options::slewTimeScale)
 742         bool checkSlewing = ( ( slewing || ( clockSlewing && data->clock()->isActive() ) )
 743                                 && Options::hideOnSlew() );
 744
 745         //shortcuts to inform wheter to draw different objects
 746         bool drawPlanets( Options::showPlanets() && !(checkSlewing && Options::hidePlanets() ) );
 747         bool drawMW( Options::showMilkyWay() && !(checkSlewing && Options::hideMilkyWay() ) );
 748         bool drawCNames( Options::showCNames() && !(checkSlewing && Options::hideCNames() ) );
 749         bool drawCLines( Options::showCLines() &&!(checkSlewing && Options::hideCLines() ) );
 750         bool drawCBounds( Options::showCBounds() &&!(checkSlewing && Options::hideCBounds() ) );
 751         bool drawGrid( Options::showGrid() && !(checkSlewing && Options::hideGrid() ) );
 752
 753         psky.begin( sky );
 754         psky.fillRect( 0, 0, width(), height(), QBrush( data->colorScheme()->colorNamed( "SkyColor" ) ) );
 755
 756         if ( drawMW ) drawMilkyWay( psky );
 757         if ( drawGrid ) drawCoordinateGrid( psky );
 758
 759         if ( drawCBounds ) drawConstellationBoundaries( psky );
 760         if ( drawCLines ) drawConstellationLines( psky );
 761         if ( drawCNames ) drawConstellationNames( psky );
 762
 763         if ( Options::showEquator() ) drawEquator( psky );
 764         if ( Options::showEcliptic() ) drawEcliptic( psky );
 765
 766         //drawing to screen, so leave scale parameter at its default value of 1.0
 767         drawStars( psky );
 768         drawDeepSkyObjects( psky );
 769         drawSolarSystem( psky, drawPlanets );
 770         drawAttachedLabels( psky );
 771         drawHorizon( psky );
 772
 773         //Finish up
 774         psky.end();
 775
 776         QPixmap *sky2 = new QPixmap( *sky );
 777         drawOverlays( sky2 );
 778         bitBlt( this, 0, 0, sky2 );
 779         delete sky2;
 780
 781         computeSkymap = false;  // use forceUpdate() to compute new skymap else old pixmap will be shown
 782 }
 783