How to pass String Value in decimal to QlineEdit?

Wasee

@jsulm ;
Thanks!
But I am getting error of invalid conversion from int to const string for lineedit.

ui->lineedit->setText(num);

jsulm

@Wasee Do you understand that setText expects a string, not int?

Wasee

Hi; everyone;
I am unable to fix my problem. Please provide exact information to do that.

jsulm

@Wasee said in How to pass String Value in decimal to QlineEdit?:

Please provide exact information to do that

I will do once more your work, but last time now. I will not spend more of my time if you refuse to learn basics.
Go to https://doc.qt.io/qt-5/qlineedit.html#text-prop and check what the type is.
Type is QString.
C++ most basic knowledge: QString != int.
So, you can't pass an int as parameter to QLineEdit::setText, because setText() expects a QString.
I really fail to understand what is not clear about it?!
Maybe you should read a C++ book?

Temp_reading.start("sudo devmem2 0x80000000");
Temp_reading.waitForFinished();
QString output(Temp_reading.readAllStandardOutput());
ui->lineedit->setText(output);

Wasee

@jsulm Hi;
Its giving me Values continuous but I need to print these values after 0x in integer form in line-edit.
(0xb6f44000):0x11EACAC
(0xb6efe00):0x11EACAC
(0xb6fd4000):0x11EACAC
(0xb6fde000):0x11EACAC

jsulm

@Wasee What's wrong with https://doc.qt.io/qt-5/qstring.html#number-1?

d = Qstring(list).toInt(&ok, 16); // Since you handle hex numbers you need to tell toInt that it is a hex number - so pass 16 as base
ui->lineedit->setText(QString::number(d));

Wasee

@jsulm Hi;
Its giving me value 0 in my lineedit.

jsulm

@Wasee That means that the conversion from string to int failed. I'm now out of this thread. Debug your code to see what happens and fix the issues...

J.Hilk

Temp_reading.start("sudo devmem2 0x80000000");
Temp_reading.waitForFinished();
QString output(Temp_reading.readAllStandardOutput());
output = output.replace("(", "").replace(")", "").replace(":", "");
auto split = output.split("0x");
QString str("%1:%2");
str= str.arg(split.at(1).toLongLong(nullptr, 16)).arg(split.at(2).toLongLong(nullptr, 16));
ui->lineedit->setText(str);

alt text

Wasee

@J-Hilk Hi;
I am still getting error "split does not name a type" and "split is not declare in this scope" and "nullptr was not declared in this scope"
thanks

J.Hilk

@Wasee said in How to pass String Value in decimal to QlineEdit?:

"nullptr was not declared in this scope"

impossible if you're using c++11 or later !

split does not name a type

either you forgot auto or you're really not using c++11. Split it is of type QStringList

Wasee

@J-Hilk Hi;
how I can solve this issue?

J.Hilk

@Wasee add c++11 to your compiler call

Wasee

@J-Hilk Hi;
Problem solved but I need little bit change its giving me value 0:108280000, I didn't need 0: in this value how I can remove it.

jsulm

@Wasee said in How to pass String Value in decimal to QlineEdit?:

how I can remove it

How about doing what you already did in this thread: use split() method and ':' as split character.

J.Hilk

@Wasee
the magic happens here

QString str("%1:%2");
str= str.arg(split.at(1).toLongLong(nullptr, 16)).arg(split.at(2).toLongLong(nullptr, 16));

do you see, what is happening?

assuming your result from the external process is of the format
(0xb6f44000):0x11EACAC

like you wrote earlier.
than splitwill contain

output = output.replace("(", "").replace(")", "").replace(":", "");
auto split = output.split("0x");
// index 0 = ""
//index 1 = "b6f44000"
//index 2 = "11EACAC"

so depending on what value you want, you want index 1 or 2 therefore

ui->lineedit->setText(QString::number(split.at(index1or2),16);

Wasee

@J-Hilk Hi;
Its giving me index1or2 declaration error here.
thanks

jsulm

@Wasee said in How to pass String Value in decimal to QlineEdit?:

index1or2

Come on - this is just a placeholder. You need to replace it with either index1 or index2...

Wasee

@jsulm Hi;
When I placed this code:
/@
ui->lineedit->setText(QString::number(split.at(index1or2),16);
@/

Its giving me error again of invalid conversion.
Simply tell me how I can convert it into integer of following external value.
/@jsulm
Temp_reading.start("sudo devmem2 0x80000000");
Temp_reading.waitForFinished();
QString output(Temp_reading.readAllStandardOutput());
output = output.replace("(", "").replace(")", "").replace(":", "");
auto split = output.split("0x");
QString str("%1:%2");
str= str.arg(split.at(1).toLongLong(nullptr, 16)).arg(split.at(2).toLongLong(nullptr, 16));

@/
just convert it into integer value.

jsulm

@Wasee said in How to pass String Value in decimal to QlineEdit?:

Simply tell me how I can convert it into integer of following external value

You already was told how and @J-Hilk even gave you code.
If it does not work then please be so kind and analyse what happens. This is what a developer should do in such a situation.
What does split.at(index1) or split.at(index2) return? Does it return a string containing a valid hex number?