void DrawShape::featuredetect(int XPoint,int YPoint)
{
if(!sfile.empty() && XPoint>=(x_pos_shift-increase_width/2)*6.40 && XPoint<=(x_pos_shift-increase_width/2)*6.40+(100+increase_width)*6.4 && YPoint>=(y_pos_shift-increase_height/2)*4.8 && YPoint<=(y_pos_shift-increase_height/2)*4.8+(100+increase_height)*4.8 )//check if point is inside the view area
{
OGRDataSource *poDS;
string dfile = sfile + ".shp";
string shp = "g_4326/" + sfile + ".shp";
poDS = OGRSFDriverRegistrar::Open(shp.c_str(), FALSE ); //comment till here
if( poDS == NULL )
{
WApplication::instance()->doJavaScript("alert('Open failed')");
cout << "Open failed";
}
OGRLayer *poLayer;
poLayer = poDS->GetLayerByName( sfile.c_str() ); // comment here
OGRFeature *poFeature;
OGREnvelope * psExtent = new OGREnvelope();
poLayer->GetExtent(psExtent);
double xMin = psExtent->MinX;
double yMin = psExtent->MinY;
double xMax = psExtent->MaxX;
double yMax = psExtent->MaxY;
stringstream strm;
strm << xMin;
string exp;
double scaleFactor;
string bound_string = strm.str();
int size = bound_string.size();
size_t found=bound_string.find("+");
if (found!=string::npos) {
exp = bound_string.substr(found+1,size);
}
if(exp.empty()) {
stringstream strExtent;
strExtent << yMin;
bound_string = strExtent.str();
size = bound_string.size();
found = bound_string.find("+");
if(found!=string::npos) {
exp = bound_string.substr(found+1,size);
}
}
if(exp.empty()) {
stringstream strExtent;
strExtent << xMax;
bound_string = strExtent.str();
size = bound_string.size();
found = bound_string.find("+");
if(found!=string::npos) {
exp = bound_string.substr(found+1,size);
}
}
if(exp.empty()) {
stringstream strExtent;
strExtent << yMax;
bound_string = strExtent.str();
size = bound_string.size();
found = bound_string.find("+");
if(found!=string::npos) {
exp = bound_string.substr(found+1,size);
}
}
if(!exp.empty()) {
int exponent = boost::lexical_cast<int>(exp);
exponent-=3;
scaleFactor = pow (10,exponent);
}
else
{
scaleFactor = 1;
}
xMin/=scaleFactor;
xMax/=scaleFactor;
yMin/=scaleFactor;
yMax/=scaleFactor;
double gWidth = xMax - xMin;
double gHeight = yMax - yMin;
double widthFactor = 1;
double pwidth = abs(gWidth-gHeight);
double s = gWidth - gHeight;
if(s<0.16)
gWidth = gHeight + 0.16;
double scaledX=(XPoint*(gWidth* widthFactor*(100-increase_width)/100)/640 + (xMin+(-x_pos_shift+increase_width/2)/100*gWidth* widthFactor))*scaleFactor;
double scaledY=(YPoint*(gHeight*widthFactor*(-1+increase_height/100))/480 + (yMax+(y_pos_shift-increase_height/2)/100*gHeight*widthFactor))*scaleFactor;
OGRPoint *poPoint =new OGRPoint();
poPoint->setX(scaledX);
poPoint->setY(scaledY);
poLayer->ResetReading();
int index=0;bool flagFeature=false;
while( (poFeature = poLayer->GetNextFeature()) != NULL )
{
OGRGeometry *poGeometry;
poGeometry = poFeature->GetGeometryRef();
if(poGeometry->Distance(poPoint)/scaleFactor<=0.01*gWidth*widthFactor)
{
flagFeature=true;
//std::cerr<<index<<" " <<flagFeature<<" "<<poGeometry->Distance(poPoint);
break;
}
index++;
}
if(flagFeature)
DBFDialog *attrtable =new DBFDialog(cfile,sfile,flagFeature,index);
}
}
