Where can I find a code for BC 0.8 GUI?

[Many Coins]

Hello!

Where is the code responsible for the autocomplete form fields in Bitcoin Core 0.8?

For example:



Here, the "Amount" field is auto-completed with zeros after the number is entered. I want to find the code that does this. Where do I need to look?

Thank you!

[1715452686]

1715452686

[Xynerise]

Bitcoin Core uses the Qt GUI, and everything pertaining to it can be found in

Code:

master/src/qt

[starmyc]

Hello!

Where is the code responsible for the autocomplete form fields in Bitcoin Core 0.8?

Not 100% sure, but it is most likely filed by validator in the widget there:

Code:

void setupAmountWidget(QLineEdit *widget, QWidget *parent)
{
    QDoubleValidator *amountValidator = new QDoubleValidator(parent);
    amountValidator->setDecimals(8);
    amountValidator->setBottom(0.0);
    widget->setValidator(amountValidator);
    widget->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
}

[shahzadafzal]

Check below source code at location

Code:

\bitcoin-master\src\qt\bitcoingui.cpp

This is the code responsible for formatting the amounts:

Code:

QString BitcoinUnits::format(int unit, const CAmount& nIn, bool fPlus, SeparatorStyle separators)
{
    // Note: not using straight sprintf here because we do NOT want
    // localized number formatting.
    if(!valid(unit))
        return QString(); // Refuse to format invalid unit
    qint64 n = (qint64)nIn;
    qint64 coin = factor(unit);
    int num_decimals = decimals(unit);
    qint64 n_abs = (n > 0 ? n : -n);
    qint64 quotient = n_abs / coin;
    qint64 remainder = n_abs % coin;
    QString quotient_str = QString::number(quotient);
    QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');

    // Use SI-style thin space separators as these are locale independent and can't be
    // confused with the decimal marker.
    QChar thin_sp(THIN_SP_CP);
    int q_size = quotient_str.size();
    if (separators == separatorAlways || (separators == separatorStandard && q_size > 4))
        for (int i = 3; i < q_size; i += 3)
            quotient_str.insert(q_size - i, thin_sp);

    if (n < 0)
        quotient_str.insert(0, '-');
    else if (fPlus && n > 0)
        quotient_str.insert(0, '+');
    return quotient_str + QString(".") + remainder_str;
}

[Many Coins]

shahzadafzal, starmyc, Xynerise

Thank you!

but I try change

Code:

amount->setDecimals(8);

to "5" in src\qt\bitcoinamountfield.cpp and

Code:

amountValidator->setDecimals(8);

in guiutil.cpp and

Code:

case real_type:  os_ << std::showpoint << std::fixed << std::setprecision(8)

in src\json\json_spirit_writer_template.h

No way. The number of zeros after the comma is still 8 and not 5.

How to change it in src\qt\bitcoingui.cpp - I do not understand.

Can you tell me please?

[starmyc]

shahzadafzal, starmyc, Xynerise

Thank you!

but I try change

Code:

amount->setDecimals(8);

to "5" in src\qt\bitcoinamountfield.cpp and

Code:

amountValidator->setDecimals(8);

No way. The number of zeros after the comma is still 8 and not 5.

How to change it in src\qt\bitcoingui.cpp - I do not understand.

Can you tell me please?

Okay, I was wrong.

Your widget is created in bitcoinamountfield.cpp like this:

Code:

BitcoinAmountField::BitcoinAmountField(QWidget *parent):
        QWidget(parent), amount(0), currentUnit(-1)
{
    amount = new QDoubleSpinBox(this);
    amount->setLocale(QLocale::c());
    amount->setDecimals(8);
    amount->installEventFilter(this);
    amount->setMaximumWidth(500);
    amount->setSingleStep(0.001);

    ...

    // Set default based on configuration
    unitChanged(unit->currentIndex());
}

But, the function (also a qt "slot") will also change it:

Code:

void BitcoinAmountField::unitChanged(int idx)
{
    // Use description tooltip for current unit for the combobox
    unit->setToolTip(unit->itemData(idx, Qt::ToolTipRole).toString());

    // Determine new unit ID
    int newUnit = unit->itemData(idx, BitcoinUnits::UnitRole).toInt();

    // Parse current value and convert to new unit
    bool valid = false;
    qint64 currentValue = value(&valid);

    currentUnit = newUnit;

    // Set max length after retrieving the value, to prevent truncation
    amount->setDecimals(BitcoinUnits::decimals(currentUnit));

    ...

If you want to change the number of decimals to 5, you need to change it in the UI constructor and in the BitcoinUnits::decimals function as well (or put 5 instead of modifying the function - at least, it worked for me on your coin source tree)

[Many Coins]

or put 5 instead of modifying the function

Yes, its working Thank you.

I'll try to change the function.

[Many Coins]

Wow! So simply! ))

in src/qt/bitcoinunits.cpp

Code:

int BitcoinUnits::decimals(int unit)
{
    switch(unit)
    {
    case BTC: return 8;
    case mBTC: return 5;
    case uBTC: return 2;
    default: return 0;
    }
}

 

Thank you!

[shahzadafzal]

Wow! So simply! ))

in src/qt/bitcoinunits.cpp

Well I thought you want to change on that particular screen.

Here bitcoinunits.cpp you will change the bitcoin decimals for the whole system? Btw why want to do this?

[Many Coins]

Well I thought you want to change on that particular screen.

Here bitcoinunits.cpp you will change the bitcoin decimals for the whole system? Btw why want to do this?

I'll show you later

By the way, do you happen to know why these values are necessary:

Code:

amount->setDecimals(8); in src/qt/bitcoinamountfield.cpp

Code:

amountValidator->setDecimals(8); in src/qt/guiutil.cpp

Code:

case real_type:  os_ << std::showpoint << std::fixed << std::setprecision(8) in src/json/json_spirit_writer_template.h

What do they influence?