kstars/kstars/mapcanvas.cpp

   1 /***************************************************************************
   2                           mapcanvas.cpp  -  K Desktop Planetarium
   3                              -------------------
   4     begin                : Tue Apr 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 #include <stdlib.h>
  19 #include <kstandarddirs.h>
  20 #include <qpainter.h>
  21 #include <qpixmap.h>
  22
  23 #include "mapcanvas.h"
  24 #include "locationdialog.h"
  25 #include "kstars.h"
  26 #include "kstarsdata.h"
  27
  28 MapCanvas::MapCanvas(QWidget *parent, const char *name ) : QWidget(parent,name) {
  29         BGColor = "#33A";
  30         setBackgroundColor( QColor( BGColor ) );
  31         setBackgroundMode( QWidget::NoBackground );
  32         Canvas = new QPixmap();
  33         bgImage = new QPixmap();
  34         LocationDialog *ld = (LocationDialog *)topLevelWidget();
  35         KStars *ks = (KStars *)ld->parent();
  36         QString bgFile = ks->data()->stdDirs->findResource( "data", "kstars/geomap.png" );
  37         bgImage->load( bgFile, "PNG" );
  38 }
  39
  40 MapCanvas::~MapCanvas(){
  41         delete bgImage;
  42         delete Canvas;
  43 }
  44
  45 void MapCanvas::setGeometry( int x, int y, int w, int h ) {
  46         QWidget::setGeometry( x, y, w, h );
  47         Canvas->resize( w, h );
  48         origin.setX( w/2 );
  49         origin.setY( h/2 );
  50 }
  51
  52 void MapCanvas::setGeometry( const QRect &r ) {
  53         QWidget::setGeometry( r );
  54         Canvas->resize( r.width(), r.height() );
  55         origin.setX( r.width()/2 );
  56         origin.setY( r.height()/2 );
  57 }
  58
  59 void MapCanvas::mousePressEvent( QMouseEvent *e ) {
  60         LocationDialog *ld = (LocationDialog *)topLevelWidget();
  61
  62         //Determine Lat/Long corresponding to event press
  63         int lng = ( e->x() - origin.x() );
  64         int lat  = ( origin.y() - e->y() );
  65
  66         ld->findCitiesNear( lng, lat );
  67 }
  68
  69 void MapCanvas::paintEvent( QPaintEvent * ) {
  70         QPainter pcanvas;
  71         LocationDialog *ld = (LocationDialog *)topLevelWidget();
  72   KStars *ks = (KStars *)ld->parent();
  73
  74         //prepare the canvas
  75         pcanvas.begin( Canvas );
  76 //      pcanvas.fillRect( 0, 0, width(), height(), QBrush( QColor( BGColor ) ) );
  77         pcanvas.drawPixmap( 0, 0, *bgImage );
  78 //      pcanvas.setBrush( white );
  79         pcanvas.setPen( QPen( QColor( "SlateGrey" ) ) );
  80
  81         //Draw cities
  82         QPoint o;
  83
  84         for ( GeoLocation *g=ks->data()->geoList.first(); g; g = ks->data()->geoList.next() ) {
  85                 o.setX( int( g->lng()->Degrees() + origin.x() ) );
  86                 o.setY( height() - int( g->lat()->Degrees() + origin.y() ) );
  87
  88                 if ( o.x() >= 0 && o.x() <= width() && o.y() >=0 && o.y() <=height() ) {
  89                         pcanvas.drawPoint( o.x(), o.y() );
  90                 }
  91         }
  92
  93   //redraw the cities that appear in the filtered list, with a white pen
  94         //If the list has not been filtered, skip the redraw.
  95         if ( ld->filteredList()->count() ) {
  96                 pcanvas.setPen( white );
  97                 for ( GeoLocation *g=ld->filteredList()->first(); g; g = ld->filteredList()->next() ) {
  98                         o.setX( int( g->lng()->Degrees() + origin.x() ) );
  99                         o.setY( height() - int( g->lat()->Degrees() + origin.y() ) );
 100
 101                         if ( o.x() >= 0 && o.x() <= width() && o.y() >=0 && o.y() <=height() ) {
 102                                 pcanvas.drawPoint( o.x(), o.y() );
 103                         }
 104                 }
 105         }
 106
 107         GeoLocation *g = ld->selectedCity();
 108         if ( g ) {
 109                 o.setX( int( g->lng()->Degrees() + origin.x() ) );
 110                 o.setY( height() - int( g->lat()->Degrees() + origin.y() ) );
 111
 112                 pcanvas.setPen( red );
 113                 pcanvas.setBrush( red );
 114                 pcanvas.drawEllipse( o.x()-3, o.y()-3, 6, 6 );
 115                 pcanvas.moveTo( o.x()-16, o.y() );
 116                 pcanvas.lineTo( o.x()-8, o.y() );
 117                 pcanvas.moveTo( o.x()+8, o.y() );
 118                 pcanvas.lineTo( o.x()+16, o.y() );
 119                 pcanvas.moveTo( o.x(), o.y()-16 );
 120                 pcanvas.lineTo( o.x(), o.y()-8 );
 121                 pcanvas.moveTo( o.x(), o.y()+8 );
 122                 pcanvas.lineTo( o.x(), o.y()+16 );
 123                 pcanvas.setPen( white );
 124                 pcanvas.setBrush( white );
 125   }
 126
 127         pcanvas.end();
 128         bitBlt( this, 0, 0, Canvas );
 129 }
 130 #include "mapcanvas.moc"