Conversion of QLists and Qvectors from floats to doubles

[mobucl]

Hi, this may be a simple question but i have looked arround and havent seen a direct answer. I have two situations, the first is:

QVector<float> test // contains a series of floating point numbers

BUT how can i convert these to QVector<double> easily. I was hoping for a simple test.toDouble() but this seems to not be the case.

Second - a bit more complex? can i convert a QList<Qlist<float> > in a similiar manner Here is some code:

QList<QList<float> > out; // create the variable discussed above
 
for (int i = 0; i< 10; i++) //create 10 Qlists to hold values
{
    out << QList<float>();
}
for (int ii = 0; ii<10;ii++ // fill the Qlists with some values
 {
     out[ii] << somevalues[ii]
  }
 
QVector<double> test;
test = out[1].toDouble // trying to take all the elements in the first Qlist of floats 
                                // and ouput them to a QVector of doubles ->DOESNT WORK

QList<QList<float> > out; // create the variable discussed above

for (int i = 0; i< 10; i++) //create 10 Qlists to hold values
{
    out << QList<float>();
}
for (int ii = 0; ii<10;ii++ // fill the Qlists with some values
 {
     out[ii] << somevalues[ii]
  }

QVector<double> test;
test = out[1].toDouble // trying to take all the elements in the first Qlist of floats 
                                // and ouput them to a QVector of doubles ->DOESNT WORK

To copy to clipboard, switch view to plain text mode 

Hope this makes sense!

Thanks

Matt

[stampede]

I was hoping for a simple test.toDouble()

QList and QVector are supposed to be generic containers, so they have no methods related to stored datatype. If you want to convert, loop and convert the numbers yourself. Or make your own FloatList, FloatVector, DoubleList, etc. classes, where you can implement conversion methods toFloat(), toDouble() and reuse it in the rest of your code ( and maybe in your other projects ).

[mobucl]

thanks stampede - i will give this a try!