Qt creator beginer questions

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i'm making a files hash calculator app for a kde linux enviroment
but i'm facing a few problems:

in this code that calculate the file's hash

hashwrapper *sha512 = new sha512wrapper();
std::string sha512Hashing = sha512->getHashFromFile("file01.iso");

you notice the file01.iso here
my question is:
1. how to place an interpolation file here instead of a predefined file?
i mean i don't know the name of the file that the user will choose in advanced
so how i do an interpolating move like in Ruby we do

userInput=gets
#{userInput}

how do i do so in Qt Creator

2. i have a lineEdit box that i made only to display the name of the file
that the user will choose after closing QFileDialog
how display the file name in the lineEdit box ?

i'm so grateful to whoever whom will answer my questions

What I have tried:

 QFile filename01;
hashwrapper *sha512 = new sha512wrapper();
std::string sha512Hashing = sha512->getHashFromFile(filename01);

and a lot of similar moves but no luck

Posted 24-Sep-16 1:06am

A7lam Lover

Updated 31-Oct-16 23:03pm

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[no name] 24-Sep-16 7:29am

"filename01" is nothing so I don't see how you think that would work. You should work through some tutorials on C++.

2 solutions

Solution 1

You would most likely use a dialog. Either a predefined OpenFileDialog or QDialog Class | Qt 4.8[^].

Posted 24-Sep-16 4:03am

Richard MacCutchan

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A7lam Lover · Accepted Answer · 2016-10-31T23:03:00

i have found the solusion

C++

QString open_file = QFileDialog::getOpenFileName(this,"open file","/home path");
QFile file01(open_file);

now if you want to use the file for any operation you like
for example (get the file name or size) just use (file01)
to do operations on

by the way there's 2 types of files on QFileDialog
1. Static File....example ("/home/user/documents/file01.iso")
2. Dynamic File...example (the file that the user WILL pick from Open Dialog)

i hope this will be clear to the beginners like myself