[Qt-interest] QString (hex) to unsigned int conversion

[Sean Harmer]

On 22/12/2010 09:34, Carel Combrink wrote:
> Hi,
>
> Is there an easy way to convert a QString containing a hex value to
> integer. See example below:
>
> bool ok;
> ui->lineEdit->setText("0xABCD");
> //ui->lineEdit->setText("0xabcd");
> //ui->lineEdit->setText("43981");
> unsigned int value = ui->lineEdit->text().toUInt(&ok);

Change the above line to:

unsigned int value = ui->lineEdit->text().toUInt(&ok, 16);

if you do not include the "0x" prefix.

If you do include the "0x" prefix then you can use a base of 0:

unsigned int value = ui->lineEdit->text().toUInt(&ok, 0);

 From the QString docs:

"If base is 0, the C language convention is used: If the string begins 
with "0x", base 16 is used; if the string begins with "0", base 8 is 
used; otherwise, base 10 is used."

Sean