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mapdatahandler.cpp
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mapdatahandler.cpp
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#include "mapdatahandler.h"
#define LABEL_CLASS "function Label(opt_options) {"\
" this.setValues(opt_options);"\
"var span = this.span_ = document.createElement('span');"\
"span.style.cssText = 'position: relative; left: -50%; top: -8px; ' +"\
" 'white-space: nowrap; border: 1px solid blue; ' +"\
"'padding: 2px; background-color: white';"\
"var div = this.div_ = document.createElement('div');"\
"div.appendChild(span);"\
"div.style.cssText = 'position: absolute; display: none';"\
"};"\
"Label.prototype = new google.maps.OverlayView;"\
"Label.prototype.onAdd = function() {"\
" var pane = this.getPanes().overlayLayer;"\
" pane.appendChild(this.div_);"\
" var me = this;"\
"this.listeners_ = ["\
" google.maps.event.addListener(this, 'position_changed',"\
" function() { me.draw(); }),"\
" google.maps.event.addListener(this, 'text_changed',"\
"function() { me.draw(); })"\
"];"\
"};"\
"Label.prototype.onRemove = function() {"\
" this.div_.parentNode.removeChild(this.div_);"\
" for (var i = 0, I = this.listeners_.length; i < I; ++i) {"\
" google.maps.event.removeListener(this.listeners_[i]);"\
" }"\
"};"\
"Label.prototype.draw = function() {"\
" var projection = this.getProjection();"\
"var position = projection.fromLatLngToDivPixel(this.get('position'));"\
"var div = this.div_;"\
"div.style.left = position.x + 'px';"\
"div.style.top = position.y + 'px';"\
" div.style.display = 'block';"\
"this.span_.innerHTML = this.get('text').toString();"\
"};"
MapDataHandler::MapDataHandler()
{
dbq.connect();
if(dbq.isConnected()) dbConnected=true;
else dbConnected = false;
queryContent="";
}
MapDataHandler::~MapDataHandler()
{
dbq.closeDB();
}
QString MapDataHandler::composeCode()
{
QString html;
QString labeljs= LABEL_CLASS;
html = "<html><head><script type=\"text/javascript\" "\
"src=\"http://maps.google.com/maps/api/js?v=3.1&sensor=true\"></script>"\
"<script type=\"text/javascript\">"+ labeljs + "</script>"\
"<style>body { font-family: sans-serif; font-size: small;}"\
"</style>"\
" </head><body style=\"margin:0px; padding:0px;\">"\
" <div id=\"map\" style=\"width: 100%; height: 100%;border: 1px solid black;margin-bottom: 10px;\"> "\
"<script type=\"text/javascript\">"\
" var map = new google.maps.Map(document.getElementById(\"map\"), "\
"{ zoom: 2, center: new google.maps.LatLng("+centerlat+","+centerlng+"), "\
"mapTypeId: google.maps.MapTypeId.ROADMAP, optimized:false, navigationControl:true, draggable:true });"\
+queryContent+
"</script>"\
"</div>"\
"</body></html>";
return html;
}
void MapDataHandler::runQuery()
{
if(!dbq.isConnected()){
emit statusUpdate("No connection to db " );
}else
{
QSqlQuery latqry;
if(latqry.exec("select distinct place, latitude, longitude from samples, location where origin_id=location.id;"))
{
if(latqry.next())
{
//take the first latitude and longitude as center of map
centerlat = latqry.value(1).toString();
centerlng = latqry.value(2).toString();
do
{
QMap<QString, double> alt;//store the alternate bases, to be displayed with the allele frequency
QString place,lat,lng;
double total;
place = latqry.value(0).toString().replace(" ","_");
QString nameNoDash = place;
nameNoDash = nameNoDash.replace("-","_");
lat = latqry.value(1).toString();
lng = latqry.value(2).toString();
queryContent.append("var marker"+nameNoDash+" = new google.maps.Marker({"\
"position: new google.maps.LatLng("+lat+","+lng+"),"\
"map: map");
queryContent.append("}); ");
queryContent.append(addFullInfoWindow(place));
total=0;
}while(latqry.next());
}/*end of if(latqry.next())*/
emit statusUpdate("Database loaded" );
}/*end of if starting query successfull*/
}
}
void MapDataHandler::updateQuery(QString condition)
{
queryContent = "";
if(!dbq.isConnected()){
emit statusUpdate("No connection to db :( " );
}else
{
QSqlQuery latqry;
if(latqry.exec("select distinct place, latitude, longitude from samples, location where origin_id=location.id and "+ condition + " ;"))
{
if(latqry.next())
{
//take the first latitude and longitude as center of map
centerlat = latqry.value(1).toString();
centerlng = latqry.value(2).toString();
do
{
QMap<QString, double> alt; //store the alternate bases, to be displayed with the allele frequency
QString place,lat,lng;
double total, freq;
place = latqry.value(0).toString().replace(" ","_");
lat = latqry.value(1).toString();
lng = latqry.value(2).toString();
//placing the marker
queryContent.append("var marker"+place+" = new google.maps.Marker({"\
"position: new google.maps.LatLng("+lat+","+lng+"),"\
"map: map,"\
"title:\' ");
//attaching the alleles' frequency to title
for(int c=0;c<alt.size();c++)
{
QString key= alt.keys().at(c);
freq= alt[key]/total*100;
queryContent.append(key+": "+QString::number(freq,'f',1)+"_");
}
queryContent.append("\'}); ");
queryContent.append(addFullInfoWindow(place, condition));
total=0;
}while(latqry.next());
}/*end of if(latqry.next())*/
}/*end of if starting query successfull*/
}
}
QStringList MapDataHandler::queryYearRange()
{
QStringList year;
if(!dbq.isConnected()){
emit statusUpdate("No connection to db :( " );
}else
{
QSqlQuery qry;
if(qry.exec("select min(year) from samples;"))
{
if(qry.next())
{
year.append(qry.value(0).toString());
}
}else
year.append("0");
if(qry.exec("select max(year) from samples;"))
{
if(qry.next())
{
year.append(qry.value(0).toString());
}
}else
year.append("3000");
}
return year;
}
QString MapDataHandler::addInfoWindow(QString place)
{
QSqlQuery sampleqry;
QString script="";
script.append("var infowin"+place+"= new google.maps.InfoWindow();");
if(sampleqry.exec("select Name from Samples where Origin=\'"+place+"\';"))
{
if(sampleqry.next())
{
QString placeList="";
do
{
placeList += sampleqry.value(0).toString()+"<br>";
}while(sampleqry.next());
script.append("infowin"+place+".setContent(\'"+placeList+"\');");
}
}
else
{
script.append("infowin"+place+".setContent('No Information Available');");
}
script.append("google.maps.event.addListener(marker"+place+", 'click', function() {"\
"infowin"+place+".open(map,marker"+place+");"\
"});");
return script;
}
QString MapDataHandler::addFullInfoWindow(QString place)//at the moment it just include name of samples and their isolation year, more information can be included (to be discussed)
{
QSqlQuery sampleqry;
QString script="";
QString placeName = place;
place = place.replace("-","_");
script.append("var infowin"+place+"= new google.maps.InfoWindow();");
if(sampleqry.exec("select name,year from samples,location where location.place=\'"+placeName.replace("_"," ") +"\' and origin_id=location.id ;"))
{
if(sampleqry.next())
{
QString placeList="";
do
{
placeList += sampleqry.value(0).toString()+" ( "+sampleqry.value(1).toString()+") <br>"; // append name of samples and their isolation year
}while(sampleqry.next());
script.append("infowin"+place+".setContent(\'"+placeList+"\');");
}else
qDebug() << "No result for query: "<< sampleqry.lastQuery();
}
else
{
script.append("infowin"+place+".setContent('No Information Available');");
}
script.append("google.maps.event.addListener(marker"+place+", 'click', function() {"\
"infowin"+place+".open(map,marker"+place+");"\
"});");
return script;
}
QString MapDataHandler::addFullInfoWindow(QString place, QString condition)
{
QSqlQuery sampleqry;
QString placeName = place;
QString script="";
place = place.replace("-","_");
script.append("var infowin"+place+"= new google.maps.InfoWindow();");
if(sampleqry.exec("select name,year from samples,location where location.place=\'"+placeName.replace("_"," ") +"\' and origin_id=location.id and "+ condition+ ";"))
{
if(sampleqry.next())
{
QString placeList="";
do
{
placeList += sampleqry.value(0).toString()+" ( "+sampleqry.value(1).toString()+") <br>"; // append name of samples and their isolation year
}while(sampleqry.next());
//qDebug() << "placeList : " << placeList;
script.append("infowin"+place+".setContent(\'"+placeList+"\');");
}
}
else
{
script.append("infowin"+place+".setContent('No Information Available');");
}
script.append("google.maps.event.addListener(marker"+place+", 'click', function() {"\
"infowin"+place+".open(map,marker"+place+");"\
"});");
//qDebug() << "infowin"+place+": " << script;
return script;
}