Use of Variable or Constant

freesix

Hi guys,

I wanted to know use of variables or constants not to directly use "mDir.AllDirs" and "mDir.count()" within qDebug as what is in the code below.

I mean to put "mDir.AllDirs" and "mDir.count()" in different variables, then I may use them through qDebug.

@
QDir mDir("C:/Windows/System32");

foreach(QFileInfo mitm, mDir.entryList())
{
    qDebug() << mitm.absoluteFilePath();
}

qDebug () <<"\nNumber of directories :" <<mDir.AllDirs <<"items";

qDebug () <<"\nNumber of files :" <<mDir.count() <<"items";

@

sierdzio

AllDirs is "an enum value in QDir":http://qt-project.org/doc/qt-5/qdir.html#Filter-enum. It is not an access function or anything.

If you want to display all dirs inside a certain QDir, you need to iterate over QDir::entryList() or QDir::entryInfoList(), combined with a filter. Please see the documentation.

freesix

thanks.

if I understand you, you meant there's no other way to do,
and it always must be like I did in the above code?

sierdzio

There are always numerous ways to achieve a goal. I do not really understand what you are trying to do in your code, so I can't answer that question.

freesix

I wanted a code like this :

@QMyVariable FirstVariable = mDir.count();

QMyVariable SecondVariable = mDir.AllDirs;

QDir mDir("C:/Windows/System32");

foreach(QFileInfo mitm, mDir.entryList())
{
    qDebug() << mitm.absoluteFilePath();
}


qDebug () <<"\nNumber of directories :" <<FirstVariable <<"items";

qDebug () <<"\nNumber of files :" <<SecondVariable <<"items";

@

sierdzio

Mate, posting the same (wrong) code again does not help me understand your problem. So, I will be guessing what you mean.

You want to print all files and directories in a folder, and then count them separately. Correct? This should work:

@
QDir mDir("C:/Windows/System32");
qDebug() << mDir.entryList(QDir::Dirs | QDir::Files | QDir:NoDotAndDotDot);
qDebug() << "Number of directories:" << mDir.entryList(QDir::Dirs).count();
qDebug() << "Number of files:" << mDir.entryList(QDir::Files).count();
@

freesix

okay, let me be explicit.

The first code I posted on my first post is working GREAT, without any problem, you may also test it from your PC if you want; and my concern is not there !

I might also use it as it's working fine, [ it doesn't a matter ] but I just want to use variable/constant in that code precisely in qDebug while displaying instead of directly using these enum value, like you called them.

I'm going to reformulate my question :

In accordance with the code that is on my first post, I need the result of "mDir.AllDirs" & "mDir.count()" to be saved in variables before displaying them through qDebug, and after using these variables through qDebug.

sierdzio

@
QDir::Filter myValue1 = mDir.AllDirs;
int myValue2 = mDir.count();
@

But I want to point it out again: AllDir value is an enum. It will not change to anything else, regardless of what you do to mDir variable. You can use QDir::AllDirs and it will have exactly the same effect, without the need to define an object (mDir).