kstars

mapcanvas.cpp

00001 /***************************************************************************
00002                           mapcanvas.cpp  -  K Desktop Planetarium
00003                              -------------------
00004     begin                : Tue Apr 10 2001
00005     copyright            : (C) 2001 by Jason Harris
00006     email                : jharris@30doradus.org
00007  ***************************************************************************/
00008 
00009 /***************************************************************************
00010  *                                                                         *
00011  *   This program is free software; you can redistribute it and/or modify  *
00012  *   it under the terms of the GNU General Public License as published by  *
00013  *   the Free Software Foundation; either version 2 of the License, or     *
00014  *   (at your option) any later version.                                   *
00015  *                                                                         *
00016  ***************************************************************************/
00017 
00018 #include <stdlib.h>
00019 #include <kstandarddirs.h>
00020 #include <qpainter.h>
00021 #include <qpixmap.h>
00022 
00023 #include "mapcanvas.h"
00024 #include "locationdialog.h"
00025 #include "kstars.h"
00026 #include "kstarsdata.h"
00027 
00028 MapCanvas::MapCanvas(QWidget *parent, const char *name ) : QWidget(parent,name) {
00029     BGColor = "#33A";
00030     setBackgroundColor( QColor( BGColor ) );
00031     setBackgroundMode( QWidget::NoBackground );
00032     Canvas = new QPixmap();
00033     bgImage = new QPixmap();
00034     LocationDialog *ld = (LocationDialog *)topLevelWidget();
00035     KStars *ks = (KStars *)ld->parent();
00036     QString bgFile = ks->data()->stdDirs->findResource( "data", "kstars/geomap.png" );
00037     bgImage->load( bgFile, "PNG" );
00038 }
00039 
00040 MapCanvas::~MapCanvas(){
00041     delete bgImage;
00042     delete Canvas;
00043 }
00044 
00045 void MapCanvas::setGeometry( int x, int y, int w, int h ) {
00046     QWidget::setGeometry( x, y, w, h );
00047     Canvas->resize( w, h );
00048     origin.setX( w/2 );
00049     origin.setY( h/2 );
00050 }
00051 
00052 void MapCanvas::setGeometry( const QRect &r ) {
00053     QWidget::setGeometry( r );
00054     Canvas->resize( r.width(), r.height() );
00055     origin.setX( r.width()/2 );
00056     origin.setY( r.height()/2 );
00057 }
00058 
00059 void MapCanvas::mousePressEvent( QMouseEvent *e ) {
00060     LocationDialog *ld = (LocationDialog *)topLevelWidget();
00061 
00062     //Determine Lat/Long corresponding to event press
00063     int lng = ( e->x() - origin.x() );
00064     int lat  = ( origin.y() - e->y() );
00065 
00066     ld->findCitiesNear( lng, lat );
00067 }
00068 
00069 void MapCanvas::paintEvent( QPaintEvent * ) {
00070     QPainter pcanvas;
00071     LocationDialog *ld = (LocationDialog *)topLevelWidget();
00072   KStars *ks = (KStars *)ld->parent();
00073 
00074     //prepare the canvas
00075     pcanvas.begin( Canvas );
00076 //  pcanvas.fillRect( 0, 0, width(), height(), QBrush( QColor( BGColor ) ) );
00077     pcanvas.drawPixmap( 0, 0, *bgImage );
00078 //  pcanvas.setBrush( white );
00079     pcanvas.setPen( QPen( QColor( "SlateGrey" ) ) );
00080 
00081     //Draw cities
00082     QPoint o;
00083 
00084     for ( GeoLocation *g=ks->data()->geoList.first(); g; g = ks->data()->geoList.next() ) {
00085         o.setX( int( g->lng()->Degrees() + origin.x() ) );
00086         o.setY( height() - int( g->lat()->Degrees() + origin.y() ) );
00087 
00088         if ( o.x() >= 0 && o.x() <= width() && o.y() >=0 && o.y() <=height() ) {
00089             pcanvas.drawPoint( o.x(), o.y() );
00090         }
00091     }
00092 
00093   //redraw the cities that appear in the filtered list, with a white pen
00094     //If the list has not been filtered, skip the redraw.
00095     if ( ld->filteredList()->count() ) {
00096         pcanvas.setPen( white );
00097         for ( GeoLocation *g=ld->filteredList()->first(); g; g = ld->filteredList()->next() ) {
00098             o.setX( int( g->lng()->Degrees() + origin.x() ) );
00099             o.setY( height() - int( g->lat()->Degrees() + origin.y() ) );
00100 
00101             if ( o.x() >= 0 && o.x() <= width() && o.y() >=0 && o.y() <=height() ) {
00102                 pcanvas.drawPoint( o.x(), o.y() );
00103             }
00104         }
00105     }
00106 
00107     GeoLocation *g = ld->selectedCity();
00108     if ( g ) {
00109         o.setX( int( g->lng()->Degrees() + origin.x() ) );
00110         o.setY( height() - int( g->lat()->Degrees() + origin.y() ) );
00111 
00112         pcanvas.setPen( red );
00113         pcanvas.setBrush( red );
00114         pcanvas.drawEllipse( o.x()-3, o.y()-3, 6, 6 );
00115         pcanvas.moveTo( o.x()-16, o.y() );
00116         pcanvas.lineTo( o.x()-8, o.y() );
00117         pcanvas.moveTo( o.x()+8, o.y() );
00118         pcanvas.lineTo( o.x()+16, o.y() );
00119         pcanvas.moveTo( o.x(), o.y()-16 );
00120         pcanvas.lineTo( o.x(), o.y()-8 );
00121         pcanvas.moveTo( o.x(), o.y()+8 );
00122         pcanvas.lineTo( o.x(), o.y()+16 );
00123         pcanvas.setPen( white );
00124         pcanvas.setBrush( white );
00125   }
00126 
00127     pcanvas.end();
00128     bitBlt( this, 0, 0, Canvas );
00129 }
00130 #include "mapcanvas.moc"
kstars

mapcanvas.cpp

kstars

API Reference
