[HELP] C++ VS to QT

John_38

Hello / good evening,
I call on to you because I do not manage to realize what I would want to make.
I would like to convert this code written with Visual Studio on Qt.
Here is the code:
@
Wstring Username;
Wcin > > Username;
Username = L"Hello" + Username
@

Current code:
@
std::wstring Username;
QString user = ui->lineEdit->text();
Username = L"Hello" + user;
@

I want put my username in LineEdit.

Thank you if you can help me!

Best Regards,
John

SGaist

Hi and welcome to devnet,

First thing you should do is to use QString. That will simplify thing.

Is it a different QLineEdit ? What should trigger the update of that QLineEdit ?

The basic would to:

ui->otherLineEdit->setText(QStringLiteral("Hello") + ui->lineEdit->text());

John_38

Hello,
Thanks to you to have answered so fast!
I think that I badly expressed myself.
I am developing a software for the modification of a game.
I make the attachment for the process by detection of the name of the window.
The name of the window is: Call of Duty ® - ship - USERNAME (your steam username).
Here is the code which I have at present in my source(spring):
HWND hWnd = FindWindow (0, L " Call of Duty ® - ship - ");
I would like to make this:
HWND hWnd = FindWindow (0, L " Call of Duty ® - ship - " + ui-> lineEdit-> text ());
But it does not work.*
Can you give me work code ?

And in LineEdit he put in his username.
See you what I wants to say ?

Thanks to you!

Best regards,
John.

JohanSolo

@John_38 said:

HWND hWnd = FindWindow (0, L " Call of Duty ® - ship - " + ui-> lineEdit-> text ());
But it does not work.*

Because you cannot concatenate const char* and QString. Use QString( " Call of Duty ® - ship - %1" ).arg( ui-> lineEdit-> text ()) which you should probably transform into const char* afterwards.

John_38

@John_38 said:

HWND hWnd = FindWindow (0, L " Call of Duty ® - ship - " + ui-> lineEdit-> text ());

Thank to your answer ! :-)

Here is what has to look like my code?:
QString("Call of Duty ® - ship - %1").arg(ui->lineEdit->text())

JohanSolo

@John_38 said:

@John_38 said:

HWND hWnd = FindWindow (0, L " Call of Duty ® - ship - " + ui-> lineEdit-> text ());

Thank to your answer ! :-)

Here is what has to look like my code?:
QString("Call of Duty ® - ship - %1").arg(ui->lineEdit->text())

I don't know about FIndWindow signature, I'm assuming it's const char*, therefore your line should read

HWND hWnd = FindWindow (0, QString("Call of Duty ® - ship - %1").arg(ui->lineEdit->text()).toLocal8Bit().constData());

EDIT: If you want help, please give more detail as "it does ot work" doesn't give us much information. My crystal ball is currently unavailable for repairs...

John_38

@JohanSolo said:

HWND hWnd = FindWindow (0, QString("Call of Duty ® - ship - %1").arg(ui->lineEdit->text()).toLocal8Bit().constData());

I have test your code.
I have this error: http://prntscr.com/bu9r6r

JohanSolo

Maybe toStdWString would help...

John_38

@John_38 said:

HWND hWnd = FindWindow (0, QString("Call of Duty ® - ship - %1").arg(ui->lineEdit->text()).toLocal8Bit().constData());

Oh :/
http://prntscr.com/bu9zox

JohanSolo

I'm sorry, but I have no idea about what is this LPCWSTR type is... Therefore I cannot give you any hints on how to convert QString to this type.

John_38

I have found !!!!
Big thank to @JohanSolo !
Code: HWND hwnd = FindWindow (0, QString("Call of Duty® - ship - %1").arg(ui->lineEdit->text()).toStdWString().c_str());

JohanSolo

@John_38 said:

I have found !!!!
Big thank to @JohanSolo !
Code: HWND hwnd = FindWindow (0, QString("Call of Duty® - ship - %1").arg(ui->lineEdit->text()).toStdWString().c_str());

Good job! You're welcome.