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518 lines
15 KiB
C++
518 lines
15 KiB
C++
// Copyright (c) 2011-2019 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <qt/bitcoinamountfield.h>
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#include <qt/bitcoinunits.h>
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#include <qt/guiconstants.h>
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#include <qt/guiutil.h>
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#include <qt/qvaluecombobox.h>
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#include <qt/guiutil.h>
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#include <assetsdir.h>
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#include <chainparams.h>
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#include <QApplication>
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#include <QAbstractSpinBox>
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#include <QHBoxLayout>
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#include <QKeyEvent>
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#include <QLineEdit>
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Q_DECLARE_METATYPE(CAsset)
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/** QSpinBox that uses fixed-point numbers internally and uses our own
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* formatting/parsing functions.
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*/
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class AmountSpinBox: public QAbstractSpinBox
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{
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Q_OBJECT
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public:
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explicit AmountSpinBox(QWidget *parent):
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QAbstractSpinBox(parent),
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currentUnit(BitcoinUnits::BTC),
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singleStep(0)
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{
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current_asset = Params().GetConsensus().pegged_asset;
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setAlignment(Qt::AlignRight);
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connect(lineEdit(), &QLineEdit::textEdited, this, &AmountSpinBox::valueChanged);
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}
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QValidator::State validate(QString &text, int &pos) const override
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{
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if(text.isEmpty())
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return QValidator::Intermediate;
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bool valid = false;
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parse(text, &valid);
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/* Make sure we return Intermediate so that fixup() is called on defocus */
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return valid ? QValidator::Intermediate : QValidator::Invalid;
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}
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void fixup(QString &input) const override
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{
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bool valid;
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CAmount val;
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if (input.isEmpty() && !m_allow_empty) {
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valid = true;
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val = m_min_amount;
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} else {
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valid = false;
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val = parse(input, &valid);
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}
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if(valid)
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{
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val = qBound(m_min_amount, val, m_max_amount);
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input = GUIUtil::formatAssetAmount(current_asset, val, currentUnit, BitcoinUnits::SeparatorStyle::ALWAYS, false);
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lineEdit()->setText(input);
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}
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}
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int currentPeggedUnit() const
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{
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assert(current_asset == Params().GetConsensus().pegged_asset);
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return currentUnit;
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}
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std::pair<CAsset, CAmount> value(bool *valid_out=nullptr) const
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{
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return std::make_pair(current_asset, parse(text(), valid_out));
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}
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void setValue(const CAsset& asset, CAmount value)
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{
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current_asset = asset;
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lineEdit()->setText(GUIUtil::formatAssetAmount(asset, value, currentUnit, BitcoinUnits::SeparatorStyle::ALWAYS, false));
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Q_EMIT valueChanged();
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}
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inline void setValue(const std::pair<CAsset, CAmount>& value)
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{
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setValue(value.first, value.second);
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}
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void SetAllowEmpty(bool allow)
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{
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m_allow_empty = allow;
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}
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void SetMinValue(const CAmount& value)
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{
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m_min_amount = value;
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}
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void SetMaxValue(const CAmount& value)
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{
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m_max_amount = value;
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}
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void stepBy(int steps) override
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{
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bool valid = false;
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auto val = value(&valid);
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CAmount currentSingleStep = singleStep;
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if (!currentSingleStep) {
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if (current_asset == Params().GetConsensus().pegged_asset) {
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currentSingleStep = 100000; // satoshis
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} else {
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currentSingleStep = 100000000; // a whole asset
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}
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}
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val.second = val.second + steps * singleStep;
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val.second = qMax(val.second, CAmount(0));
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val.second = qBound(m_min_amount, val.second, m_max_amount);
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// FIXME: Add this back in when assets can have > MAX_MONEY
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// if (val.first == Params().GetConsensus().pegged_asset)
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{
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val.second = qMin(val.second, BitcoinUnits::maxMoney());
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}
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setValue(val);
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}
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void setDisplayUnit(const CAsset& asset)
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{
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if (asset == Params().GetConsensus().pegged_asset) {
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setDisplayUnit(currentUnit);
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return;
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}
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// Only used for bitcoins -> other asset
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// Leave the number alone, since the user probably intended it for this asset
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current_asset = asset;
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Q_EMIT valueChanged();
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}
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void setDisplayUnit(int unit)
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{
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bool valid = false;
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std::pair<CAsset, CAmount> val = value(&valid);
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const bool was_pegged = (val.first == Params().GetConsensus().pegged_asset);
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current_asset = Params().GetConsensus().pegged_asset;
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currentUnit = unit;
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lineEdit()->setPlaceholderText(BitcoinUnits::format(currentUnit, m_min_amount, false, BitcoinUnits::SeparatorStyle::ALWAYS));
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if (!was_pegged) {
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// Leave the text as-is, if it's valid
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value(&valid);
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if (!valid) {
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clear();
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}
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} else
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if(valid)
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setValue(val);
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else
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clear();
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Q_EMIT valueChanged();
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}
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void setSingleStep(const CAmount& step)
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{
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singleStep = step;
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}
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QSize minimumSizeHint() const override
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{
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if(cachedMinimumSizeHint.isEmpty())
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{
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ensurePolished();
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const QFontMetrics fm(fontMetrics());
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int h = lineEdit()->minimumSizeHint().height();
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int w = GUIUtil::TextWidth(fm, BitcoinUnits::format(BitcoinUnits::BTC, BitcoinUnits::maxMoney(), false, BitcoinUnits::SeparatorStyle::ALWAYS));
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w += 2; // cursor blinking space
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QStyleOptionSpinBox opt;
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initStyleOption(&opt);
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QSize hint(w, h);
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QSize extra(35, 6);
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opt.rect.setSize(hint + extra);
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extra += hint - style()->subControlRect(QStyle::CC_SpinBox, &opt,
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QStyle::SC_SpinBoxEditField, this).size();
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// get closer to final result by repeating the calculation
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opt.rect.setSize(hint + extra);
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extra += hint - style()->subControlRect(QStyle::CC_SpinBox, &opt,
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QStyle::SC_SpinBoxEditField, this).size();
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hint += extra;
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hint.setHeight(h);
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opt.rect = rect();
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cachedMinimumSizeHint = style()->sizeFromContents(QStyle::CT_SpinBox, &opt, hint, this)
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.expandedTo(QApplication::globalStrut());
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}
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return cachedMinimumSizeHint;
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}
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private:
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CAsset current_asset;
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int currentUnit{BitcoinUnits::BTC};
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CAmount singleStep{CAmount(100000)}; // satoshis
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mutable QSize cachedMinimumSizeHint;
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bool m_allow_empty{true};
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CAmount m_min_amount{CAmount(0)};
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CAmount m_max_amount{BitcoinUnits::maxMoney()};
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/**
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* Parse a string into a number of base monetary units and
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* return validity.
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* @note Must return 0 if !valid.
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*/
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CAmount parse(const QString &text, bool *valid_out=nullptr) const
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{
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CAmount val = 0;
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bool valid = GUIUtil::parseAssetAmount(current_asset, text, currentUnit, &val);
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if(valid)
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{
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// FIXME: Add this back in when assets can have > MAX_MONEY
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if (val < 0 || (val > BitcoinUnits::maxMoney() /*&& current_asset == Params().GetConsensus().pegged_asset*/)) {
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valid = false;
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}
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}
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if(valid_out)
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*valid_out = valid;
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return valid ? val : 0;
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}
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protected:
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bool event(QEvent *event) override
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{
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if (event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease)
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{
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QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
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if (keyEvent->key() == Qt::Key_Comma)
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{
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// Translate a comma into a period
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QKeyEvent periodKeyEvent(event->type(), Qt::Key_Period, keyEvent->modifiers(), ".", keyEvent->isAutoRepeat(), keyEvent->count());
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return QAbstractSpinBox::event(&periodKeyEvent);
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}
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}
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return QAbstractSpinBox::event(event);
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}
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StepEnabled stepEnabled() const override
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{
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if (isReadOnly()) // Disable steps when AmountSpinBox is read-only
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return StepNone;
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if (text().isEmpty()) // Allow step-up with empty field
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return StepUpEnabled;
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StepEnabled rv = StepNone;
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bool valid = false;
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const std::pair<CAsset, CAmount> val = value(&valid);
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if(valid)
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{
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if (val.second > m_min_amount) {
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rv |= StepDownEnabled;
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}
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if (val.second < m_max_amount || val.first != Params().GetConsensus().pegged_asset) {
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rv |= StepUpEnabled;
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}
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}
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return rv;
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}
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Q_SIGNALS:
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void valueChanged();
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};
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#include <qt/bitcoinamountfield.moc>
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BitcoinAmountField::BitcoinAmountField(std::set<CAsset> allowed_assets, QWidget *parent) :
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QWidget(parent),
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m_allowed_assets(allowed_assets),
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amount(nullptr)
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{
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amount = new AmountSpinBox(this);
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amount->setLocale(QLocale::c());
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amount->installEventFilter(this);
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amount->setMaximumWidth(240);
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QHBoxLayout *layout = new QHBoxLayout(this);
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layout->addWidget(amount);
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unit = new QComboBox(this);
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m_allowed_assets = allowed_assets;
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for (const auto& asset : allowed_assets) {
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addAssetChoice(asset);
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}
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layout->addWidget(unit);
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layout->addStretch(1);
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layout->setContentsMargins(0,0,0,0);
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setLayout(layout);
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setFocusPolicy(Qt::TabFocus);
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setFocusProxy(amount);
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// If one if the widgets changes, the combined content changes as well
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connect(amount, &AmountSpinBox::valueChanged, this, &BitcoinAmountField::valueChanged);
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connect(unit, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &BitcoinAmountField::unitChanged);
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// Set default based on configuration
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unitChanged(unit->currentIndex());
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}
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BitcoinAmountField::BitcoinAmountField(QWidget *parent) :
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BitcoinAmountField(std::set<CAsset>({Params().GetConsensus().pegged_asset}), parent)
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{
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}
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void BitcoinAmountField::clear()
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{
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amount->clear();
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unit->setCurrentIndex(0);
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}
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void BitcoinAmountField::setEnabled(bool fEnabled)
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{
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amount->setEnabled(fEnabled);
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unit->setEnabled(fEnabled);
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}
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bool BitcoinAmountField::validate()
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{
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bool valid = false;
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fullValue(&valid);
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setValid(valid);
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return valid;
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}
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void BitcoinAmountField::setValid(bool valid)
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{
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if (valid)
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amount->setStyleSheet("");
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else
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amount->setStyleSheet(STYLE_INVALID);
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}
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bool BitcoinAmountField::eventFilter(QObject *object, QEvent *event)
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{
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if (event->type() == QEvent::FocusIn)
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{
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// Clear invalid flag on focus
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setValid(true);
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}
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return QWidget::eventFilter(object, event);
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}
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QWidget *BitcoinAmountField::setupTabChain(QWidget *prev)
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{
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QWidget::setTabOrder(prev, amount);
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QWidget::setTabOrder(amount, unit);
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return unit;
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}
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std::pair<CAsset, CAmount> BitcoinAmountField::fullValue(bool *valid_out) const
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{
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return amount->value(valid_out);
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}
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void BitcoinAmountField::setFullValue(const CAsset& asset, const CAmount& value)
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{
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amount->setValue(asset, value);
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setDisplayUnit(asset);
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}
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CAmount BitcoinAmountField::value(bool *valid_out) const
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{
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std::pair<CAsset, CAmount> val = amount->value(valid_out);
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assert(val.first == Params().GetConsensus().pegged_asset);
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return val.second;
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}
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void BitcoinAmountField::setValue(const CAmount& value)
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{
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amount->setValue(Params().GetConsensus().pegged_asset, value);
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setDisplayUnit(amount->currentPeggedUnit());
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}
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void BitcoinAmountField::SetAllowEmpty(bool allow)
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{
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amount->SetAllowEmpty(allow);
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}
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void BitcoinAmountField::SetMinValue(const CAmount& value)
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{
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amount->SetMinValue(value);
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}
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void BitcoinAmountField::SetMaxValue(const CAmount& value)
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{
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amount->SetMaxValue(value);
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}
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void BitcoinAmountField::setReadOnly(bool fReadOnly)
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{
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amount->setReadOnly(fReadOnly);
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}
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bool BitcoinAmountField::hasAssetChoice(const CAsset& asset) const
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{
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if (asset == Params().GetConsensus().pegged_asset) {
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return -1 != unit->findData(0, Qt::UserRole);
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}
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return -1 != unit->findData(QVariant::fromValue(asset), Qt::UserRole);
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}
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void BitcoinAmountField::addAssetChoice(const CAsset& asset)
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{
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if (asset == Params().GetConsensus().pegged_asset) {
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// Special handling
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for (const auto& pegged_unit : BitcoinUnits::availableUnits()) {
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unit->addItem(BitcoinUnits::shortName(pegged_unit), int(pegged_unit));
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}
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return;
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}
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unit->addItem(QString::fromStdString(gAssetsDir.GetIdentifier(asset)), QVariant::fromValue(asset));
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}
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void BitcoinAmountField::removeAssetChoice(const CAsset& asset)
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{
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if (asset == Params().GetConsensus().pegged_asset) {
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// Special handling
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for (const auto& pegged_unit : BitcoinUnits::availableUnits()) {
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unit->removeItem(unit->findData(int(pegged_unit), Qt::UserRole));
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}
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return;
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}
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unit->removeItem(unit->findData(QVariant::fromValue(asset), Qt::UserRole));
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}
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void BitcoinAmountField::setAllowedAssets(const std::set<CAsset>& allowed_assets)
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{
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std::set<CAsset> assets_to_remove;
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for (const auto& asset : m_allowed_assets) {
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if (!allowed_assets.count(asset)) {
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assets_to_remove.insert(asset);
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}
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}
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m_allowed_assets = allowed_assets;
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const QVariant& sel_userdata = unit->itemData(unit->currentIndex(), Qt::UserRole);
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const CAsset sel_asset = (sel_userdata.type() == QVariant::UserType) ? sel_userdata.value<CAsset>() : Params().GetConsensus().pegged_asset;
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for (const auto& asset : assets_to_remove) {
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// Leave it in place for now if it's selected
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if (sel_asset == asset) continue;
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removeAssetChoice(asset);
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}
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for (const auto& asset : allowed_assets) {
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if (!hasAssetChoice(asset)) {
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addAssetChoice(asset);
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}
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}
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}
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void BitcoinAmountField::unitChanged(int idx)
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{
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const CAsset previous_asset = amount->value().first;
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// Use description tooltip for current unit for the combobox
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const QVariant& userdata = unit->itemData(idx, Qt::UserRole);
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if (userdata.type() == QVariant::UserType) {
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const CAsset asset = userdata.value<CAsset>();
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unit->setToolTip(tr("Custom asset (%1)").arg(QString::fromStdString(asset.GetHex())));
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amount->setDisplayUnit(asset);
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} else {
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// Determine new unit ID
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int newUnit = userdata.toInt();
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unit->setToolTip(BitcoinUnits::description(newUnit));
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amount->setDisplayUnit(newUnit);
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}
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if (!(m_allowed_assets.count(previous_asset) || amount->value().first == previous_asset)) {
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removeAssetChoice(previous_asset);
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}
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}
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void BitcoinAmountField::setDisplayUnit(const CAsset& asset)
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{
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if (asset == Params().GetConsensus().pegged_asset) {
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setDisplayUnit(amount->currentPeggedUnit());
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return;
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}
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if (!hasAssetChoice(asset)) {
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addAssetChoice(asset);
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}
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unit->setCurrentIndex(unit->findData(QVariant::fromValue(asset), Qt::UserRole));
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}
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void BitcoinAmountField::setDisplayUnit(int newUnit)
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{
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if (!hasAssetChoice(Params().GetConsensus().pegged_asset)) {
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addAssetChoice(Params().GetConsensus().pegged_asset);
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}
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unit->setCurrentIndex(unit->findData(newUnit, Qt::UserRole));
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}
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void BitcoinAmountField::setSingleStep(const CAmount& step)
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{
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amount->setSingleStep(step);
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}
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