[SOLVED]Remember Last LineEdit data

[A Former User]

This the main.cpp file of my application ...Here idline is the pointer to QLineEdit taking input for Id
@#include<QApplication>
#include<websis.h>
#include"gui.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
a.setApplicationName("Websis Desktop Application");
a.setOrganizationName("LUG Manipal");
a.setOrganizationDomain("rajatgupta431@gmail.com");
qApp->addLibraryPath("C:/Qt/4.8.4/plugins/imageformats");

QSettings *settings;
settings = new QSettings;

makegui gogoi;
QVariant idvar;
idvar.setValue(gogoi.idline->text());
settings->setValue("Id",&idvar);
gogoi.idline->setText(settings->value("id","not set").toString());

return a.exec();

}
@
Results are not as expected...Please look into it :)

[andre]

You're not telling us what is "expected", so it is hard to judge where your code deviates from your plan

Just use a QSettings object on the stack (line 14 & 15)

What is makegui gogoi; doing? (line 17)

Why do you set a pointer to a QVariant in your settings? (line 20)

[mlong]

Also, you're using "Id" in line 20, and "id" in line 21.

[A Former User]

[quote author="Andre" date="1363711273"]# You're not telling us what is "expected", so it is hard to judge where your code deviates from your plan

Just use a QSettings object on the stack (line 14 & 15)

What is makegui gogoi; doing? (line 17)

Why do you set a pointer to a QVariant in your settings? (line 20)[/quote]

Expected is that , when user closes and restarts the application , the QLineEdit fiels already has the previously Entered Text...makegui gogoi ; declares the object of the class makegui that is responsible for making the gui part and then calling other neseccary funtions.....

[A Former User]

[quote author="mlong" date="1363711569"]Also, you're using "Id" in line 20, and "id" in line 21.
[/quote]

Fixed It :)

[mlong]

You can't just "bind" a QSettings value to a widget, which I think is what you're trying to do. QSettings doesn't work that way.

You'll need to store the text from your QLineEdit by calling QSettings::setValue() each time the text changes (either as the user type it, or when you process the values -- however it's done in your gui.) This won't typically be done in main(). It is most likely best handled in your makegui class. Also, at the time you build/initialize your gui is when you'll use QSettings::value() to set your text.

[A Former User]

[quote author="Andre" date="1363698916"]Of course. Make it persistant via storing it to a file, or using the QSettings class. Either way, you will need to load the information back on the next run.[/quote]
Am unable to use QSettings for this...Can u guide me with the other Way of storing in A text file and then retrieving it from there?

[andre]

Using a text file is not going to be any easier.

[A Former User]

Can I get a line of code that saves text of QLineedit and on restarting the app , it is retrieved ?
Please help , its very important for my project ...

[andre]

No. The point is, that there isn't any such one line of code.

You've already been given many hints, but you refuse to take the hints given.

[A Former User]

This is What was needed, its Done :)
@//read
QSettings settings("settingName");
QString aValue=settings.value("aKey").toString();

//write
QSettings settings("settingName");
QString somevalue=textedit.text();
settings.setValue("aKey",somevalue);
@