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#include "bitcoinamountfield.h"
#include "qvalidatedlineedit.h"
#include "bitcoinunits.h"
#include <QLabel>
#include <QLineEdit>
#include <QRegExpValidator>
#include <QHBoxLayout>
#include <QKeyEvent>
#include <QComboBox>
BitcoinAmountField::BitcoinAmountField(QWidget *parent):
QWidget(parent), amount(0), decimals(0), currentUnit(-1)
{
amount = new QValidatedLineEdit(this);
amount->setValidator(new QRegExpValidator(QRegExp("[0-9]*"), this));
amount->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
amount->installEventFilter(this);
amount->setMaximumWidth(100);
decimals = new QValidatedLineEdit(this);
decimals->setValidator(new QRegExpValidator(QRegExp("[0-9]+"), this));
decimals->setAlignment(Qt::AlignLeft|Qt::AlignVCenter);
decimals->setMaximumWidth(75);
QHBoxLayout *layout = new QHBoxLayout(this);
layout->setSpacing(0);
layout->addWidget(amount);
layout->addWidget(new QLabel(QString(".")));
layout->addWidget(decimals);
unit = new QComboBox(this);
unit->setModel(new BitcoinUnits(this));
layout->addWidget(unit);
layout->addStretch(1);
layout->setContentsMargins(0,0,0,0);
setLayout(layout);
setFocusPolicy(Qt::TabFocus);
setFocusProxy(amount);
// If one if the widgets changes, the combined content changes as well
connect(amount, SIGNAL(textChanged(QString)), this, SIGNAL(textChanged()));
connect(decimals, SIGNAL(textChanged(QString)), this, SIGNAL(textChanged()));
connect(unit, SIGNAL(currentIndexChanged(int)), this, SLOT(unitChanged(int)));
// TODO: set default based on configuration
unitChanged(unit->currentIndex());
}
void BitcoinAmountField::setText(const QString &text)
{
const QStringList parts = text.split(QString("."));
if(parts.size() == 2)
{
amount->setText(parts[0]);
decimals->setText(parts[1]);
}
else
{
amount->setText(QString());
decimals->setText(QString());
}
}
void BitcoinAmountField::clear()
{
amount->clear();
decimals->clear();
}
bool BitcoinAmountField::validate()
{
bool valid = true;
if(decimals->text().isEmpty())
{
decimals->setValid(false);
valid = false;
}
if(!BitcoinUnits::parse(BitcoinUnits::BTC, text(), 0))
{
setValid(false);
valid = false;
}
return valid;
}
void BitcoinAmountField::setValid(bool valid)
{
amount->setValid(valid);
decimals->setValid(valid);
}
QString BitcoinAmountField::text() const
{
if(decimals->text().isEmpty() && amount->text().isEmpty())
{
return QString();
}
return amount->text() + QString(".") + decimals->text();
}
// Intercept '.' and ',' keys, if pressed focus a specified widget
bool BitcoinAmountField::eventFilter(QObject *object, QEvent *event)
{
Q_UNUSED(object);
if(event->type() == QEvent::KeyPress)
{
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
if(keyEvent->key() == Qt::Key_Period || keyEvent->key() == Qt::Key_Comma)
{
decimals->setFocus();
decimals->selectAll();
}
}
return false;
}
QWidget *BitcoinAmountField::setupTabChain(QWidget *prev)
{
QWidget::setTabOrder(prev, amount);
QWidget::setTabOrder(amount, decimals);
return decimals;
}
qint64 BitcoinAmountField::value(bool *valid_out) const
{
qint64 val_out = 0;
bool valid = BitcoinUnits::parse(currentUnit, text(), &val_out);
if(valid_out)
{
*valid_out = valid;
}
return val_out;
}
void BitcoinAmountField::setValue(qint64 value)
{
setText(BitcoinUnits::format(currentUnit, value));
}
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->setMaxLength(BitcoinUnits::amountDigits(currentUnit));
decimals->setMaxLength(BitcoinUnits::decimals(currentUnit));
if(valid)
{
setValue(currentValue);
}
else
{
// If current value is invalid, just clear field
setText("");
}
setValid(true);
}
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