preparations for multiple unit (uBTC, mBTC, BTC) support, fix amount entry issue

14 files changed, 220 insertions, 46 deletions

diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index f1bc8e7fd2..e8d2deffc4 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -87,7 +87,8 @@ HEADERS += src/qt/bitcoingui.h \
     src/qt/qtwin.h \
     src/crypter.h \
     src/qt/sendcoinsentry.h \
-    src/qt/qvalidatedlineedit.h
+    src/qt/qvalidatedlineedit.h \
+    src/qt/bitcoinunits.h
 SOURCES += src/qt/bitcoin.cpp src/qt/bitcoingui.cpp \
     src/qt/transactiontablemodel.cpp \
     src/qt/addresstablemodel.cpp \
@@ -129,7 +130,8 @@ SOURCES += src/qt/bitcoin.cpp src/qt/bitcoingui.cpp \
     src/qt/qtwin.cpp \
     src/crypter.cpp \
     src/qt/sendcoinsentry.cpp \
-    src/qt/qvalidatedlineedit.cpp
+    src/qt/qvalidatedlineedit.cpp \
+    src/qt/bitcoinunits.cpp
 
 RESOURCES += \
     src/qt/bitcoin.qrc
diff --git a/src/qt/bitcoinamountfield.cpp b/src/qt/bitcoinamountfield.cpp
index b312b9792e..330a7bfdef 100644
--- a/src/qt/bitcoinamountfield.cpp
+++ b/src/qt/bitcoinamountfield.cpp
@@ -1,5 +1,6 @@
 #include "bitcoinamountfield.h"
 #include "qvalidatedlineedit.h"
+#include "bitcoinunits.h"
 
 #include <QLabel>
 #include <QLineEdit>
@@ -11,7 +12,7 @@ BitcoinAmountField::BitcoinAmountField(QWidget *parent):
         QWidget(parent), amount(0), decimals(0)
 {
     amount = new QValidatedLineEdit(this);
-    amount->setValidator(new QRegExpValidator(QRegExp("[0-9]?"), this));
+    amount->setValidator(new QRegExpValidator(QRegExp("[0-9]*"), this));
     amount->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
     amount->installEventFilter(this);
     amount->setMaximumWidth(100);
@@ -26,7 +27,7 @@ BitcoinAmountField::BitcoinAmountField(QWidget *parent):
     layout->addWidget(amount);
     layout->addWidget(new QLabel(QString(".")));
     layout->addWidget(decimals);
-    layout->addWidget(new QLabel(QString(" BTC")));
+    layout->addWidget(new QLabel(QString(" ") + BitcoinUnits::name(BitcoinUnits::BTC)));
     layout->addStretch(1);
     layout->setContentsMargins(0,0,0,0);
 
@@ -69,6 +70,13 @@ bool BitcoinAmountField::validate()
         decimals->setValid(false);
         valid = false;
     }
+    if(!BitcoinUnits::parse(BitcoinUnits::BTC, text(), 0))
+    {
+        amount->setValid(false);
+        decimals->setValid(false);
+        valid = false;
+    }
+
     return valid;
 }
 
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 938d030d25..bd80e42d03 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -11,13 +11,13 @@
 #include "aboutdialog.h"
 #include "clientmodel.h"
 #include "walletmodel.h"
-#include "guiutil.h"
 #include "editaddressdialog.h"
 #include "optionsmodel.h"
 #include "transactiondescdialog.h"
 #include "addresstablemodel.h"
 #include "transactionview.h"
 #include "overviewpage.h"
+#include "bitcoinunits.h"
 
 #include <QApplication>
 #include <QMainWindow>
@@ -436,7 +436,8 @@ void BitcoinGUI::askFee(qint64 nFeeRequired, bool *payFee)
     QString strMessage =
         tr("This transaction is over the size limit.  You can still send it for a fee of %1, "
           "which goes to the nodes that process your transaction and helps to support the network.  "
-          "Do you want to pay the fee?").arg(GUIUtil::formatMoney(nFeeRequired));
+          "Do you want to pay the fee?").arg(
+                BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, nFeeRequired));
     QMessageBox::StandardButton retval = QMessageBox::question(
           this, tr("Sending..."), strMessage,
           QMessageBox::Yes|QMessageBox::Cancel, QMessageBox::Yes);
@@ -462,7 +463,7 @@ void BitcoinGUI::incomingTransaction(const QModelIndex & parent, int start, int
         trayIcon->showMessage((amount)<0 ? tr("Sent transaction") :
                                            tr("Incoming transaction"),
                               tr("Date: ") + date + "\n" +
-                              tr("Amount: ") + GUIUtil::formatMoney(amount, true) + "\n" +
+                              tr("Amount: ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, amount, true) + "\n" +
                               tr("Type: ") + type + "\n" +
                               tr("Address: ") + address + "\n",
                               QSystemTrayIcon::Information);
diff --git a/src/qt/bitcoinunits.cpp b/src/qt/bitcoinunits.cpp
new file mode 100644
index 0000000000..ff30563f97
--- /dev/null
+++ b/src/qt/bitcoinunits.cpp
@@ -0,0 +1,96 @@
+#include "bitcoinunits.h"
+
+#include <QStringList>
+
+QString BitcoinUnits::name(BitcoinUnits::Unit unit)
+{
+    switch(unit)
+    {
+    case BTC: return "BTC";
+    case mBTC: return "mBTC";
+    case uBTC: return "uBTC";
+    default: return "???";
+    }
+}
+
+QString BitcoinUnits::description(BitcoinUnits::Unit unit)
+{
+    switch(unit)
+    {
+    case BTC: return "Bitcoin";
+    case mBTC: return "Milli-bitcoin";
+    case uBTC: return "Micro-bitcoin";
+    default: return "???";
+    }
+}
+
+qint64 BitcoinUnits::factor(BitcoinUnits::Unit unit)
+{
+    switch(unit)
+    {
+    case BTC:  return 100000000;
+    case mBTC: return 100000;
+    case uBTC: return 100;
+    default:   return 100000000;
+    }
+}
+
+int BitcoinUnits::decimals(BitcoinUnits::Unit unit)
+{
+    switch(unit)
+    {
+    case BTC: return 8;
+    case mBTC: return 5;
+    case uBTC: return 2;
+    default: return 0;
+    }
+}
+
+QString BitcoinUnits::format(BitcoinUnits::Unit unit, qint64 n, bool fPlus)
+{
+    // Note: not using straight sprintf here because we do NOT want
+    // localized number formatting.
+    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');
+
+    // Right-trim excess 0's after the decimal point
+    int nTrim = 0;
+    for (int i = remainder_str.size()-1; i>=2 && (remainder_str.at(i) == '0'); --i)
+        ++nTrim;
+    remainder_str.chop(nTrim);
+
+    if (n < 0)
+        quotient_str.insert(0, '-');
+    else if (fPlus && n > 0)
+        quotient_str.insert(0, '+');
+    return quotient_str + QString(".") + remainder_str;
+}
+
+QString BitcoinUnits::formatWithUnit(BitcoinUnits::Unit unit, qint64 amount, bool plussign)
+{
+    return format(unit, amount, plussign) + QString(" ") + name(unit);
+}
+
+bool BitcoinUnits::parse(BitcoinUnits::Unit unit, const QString &value, qint64 *val_out)
+{
+    int num_decimals = decimals(unit);
+    QStringList parts = value.split(".");
+    if(parts.size() != 2 || parts.at(1).size() > num_decimals)
+        return false; // Max num decimals
+    bool ok = false;
+    QString str = parts[0] + parts[1].leftJustified(num_decimals, '0');
+    if(str.size()>18)
+        return false; // Bounds check
+
+    qint64 retvalue = str.toLongLong(&ok);
+    if(val_out)
+    {
+        *val_out = retvalue;
+    }
+    return ok;
+}
diff --git a/src/qt/bitcoinunits.h b/src/qt/bitcoinunits.h
new file mode 100644
index 0000000000..fa85755ad4
--- /dev/null
+++ b/src/qt/bitcoinunits.h
@@ -0,0 +1,34 @@
+#ifndef BITCOINUNITS_H
+#define BITCOINUNITS_H
+
+#include <QString>
+
+// Bitcoin unit definitions
+class BitcoinUnits
+{
+public:
+    enum Unit
+    {
+        BTC,
+        mBTC,
+        uBTC
+    };
+
+    // Short name
+    static QString name(Unit unit);
+    // Longer description
+    static QString description(Unit unit);
+    // Number of satoshis / unit
+    static qint64 factor(Unit unit);
+    // Number of decimals left
+    static int decimals(Unit unit);
+    // Format as string
+    static QString format(Unit unit, qint64 amount, bool plussign=false);
+    // Format as string (with unit)
+    static QString formatWithUnit(Unit unit, qint64 amount, bool plussign=false);
+    // Parse string to coin amount
+    static bool parse(Unit unit, const QString &value, qint64 *val_out);
+
+};
+
+#endif // BITCOINUNITS_H
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 31b28024df..308a6ba9bc 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -37,13 +37,3 @@ void GUIUtil::setupAmountWidget(QLineEdit *widget, QWidget *parent)
     widget->setValidator(amountValidator);
     widget->setAlignment(Qt::AlignRight|Qt::AlignVCenter);
 }
-
-bool GUIUtil::parseMoney(const QString &amount, qint64 *val_out)
-{
-    return ParseMoney(amount.toStdString(), *val_out);
-}
-
-QString GUIUtil::formatMoney(qint64 amount, bool plussign)
-{
-    return QString::fromStdString(FormatMoney(amount, plussign));
-}
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index 58f8979511..26a1a03712 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -20,12 +20,6 @@ public:
     static void setupAddressWidget(QLineEdit *widget, QWidget *parent);
 
     static void setupAmountWidget(QLineEdit *widget, QWidget *parent);
-
-    // Convenience wrapper around ParseMoney that takes QString
-    static bool parseMoney(const QString &amount, qint64 *val_out);
-
-    // Convenience wrapper around FormatMoney that returns QString
-    static QString formatMoney(qint64 amount, bool plussign=false);
 };
 
 #endif // GUIUTIL_H
diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp
index 3697b9fe41..4f3a82d319 100644
--- a/src/qt/optionsdialog.cpp
+++ b/src/qt/optionsdialog.cpp
@@ -17,8 +17,9 @@
 #include <QDoubleValidator>
 #include <QRegExpValidator>
 #include <QDialogButtonBox>
+#include <QDebug>
 
-/* First (currently only) page of options */
+/* First page of options */
 class MainOptionsPage : public QWidget
 {
 public:
@@ -41,9 +42,23 @@ public slots:
 
 };
 
+class DisplayOptionsPage : public QWidget
+{
+public:
+    explicit DisplayOptionsPage(QWidget *parent=0);
+
+    void setMapper(MonitoredDataMapper *mapper);
+private:
+    QLineEdit *unit;
+signals:
+
+public slots:
+
+};
+
 OptionsDialog::OptionsDialog(QWidget *parent):
     QDialog(parent), contents_widget(0), pages_widget(0),
-    main_options_page(0), model(0)
+    model(0), main_page(0), display_page(0)
 {
     contents_widget = new QListWidget();
     contents_widget->setMaximumWidth(128);
@@ -53,8 +68,13 @@ OptionsDialog::OptionsDialog(QWidget *parent):
 
     QListWidgetItem *item_main = new QListWidgetItem(tr("Main"));
     contents_widget->addItem(item_main);
-    main_options_page = new MainOptionsPage(this);
-    pages_widget->addWidget(main_options_page);
+    main_page = new MainOptionsPage(this);
+    pages_widget->addWidget(main_page);
+
+    QListWidgetItem *item_display = new QListWidgetItem(tr("Display"));
+    //contents_widget->addItem(item_display);
+    display_page = new DisplayOptionsPage(this);
+    pages_widget->addWidget(display_page);
 
     contents_widget->setCurrentRow(0);
 
@@ -83,6 +103,8 @@ OptionsDialog::OptionsDialog(QWidget *parent):
     connect(mapper, SIGNAL(currentIndexChanged(int)), this, SLOT(disableApply()));
 
     /* Event bindings */
+    qDebug() << "setup";
+    connect(contents_widget, SIGNAL(currentRowChanged(int)), this, SLOT(changePage(int)));
     connect(buttonbox->button(QDialogButtonBox::Ok), SIGNAL(clicked()), this, SLOT(okClicked()));
     connect(buttonbox->button(QDialogButtonBox::Cancel), SIGNAL(clicked()), this, SLOT(cancelClicked()));
     connect(buttonbox->button(QDialogButtonBox::Apply), SIGNAL(clicked()), this, SLOT(applyClicked()));
@@ -93,18 +115,16 @@ void OptionsDialog::setModel(OptionsModel *model)
     this->model = model;
 
     mapper->setModel(model);
-    main_options_page->setMapper(mapper);
+    main_page->setMapper(mapper);
+    display_page->setMapper(mapper);
 
     mapper->toFirst();
 }
 
-void OptionsDialog::changePage(QListWidgetItem *current, QListWidgetItem *previous)
+void OptionsDialog::changePage(int index)
 {
-    Q_UNUSED(previous);
-    if(current)
-    {
-        pages_widget->setCurrentIndex(contents_widget->row(current));
-    }
+    qDebug() << "page" << index;
+    pages_widget->setCurrentIndex(index);
 }
 
 void OptionsDialog::okClicked()
@@ -224,3 +244,25 @@ void MainOptionsPage::setMapper(MonitoredDataMapper *mapper)
     mapper->addMapping(fee_edit, OptionsModel::Fee);
 }
 
+DisplayOptionsPage::DisplayOptionsPage(QWidget *parent):
+        QWidget(parent)
+{
+    QVBoxLayout *layout = new QVBoxLayout();
+    QHBoxLayout *unit_hbox = new QHBoxLayout();
+    unit_hbox->addSpacing(18);
+    QLabel *unit_label = new QLabel(tr("&Unit: "));
+    unit_hbox->addWidget(unit_label);
+    unit = new QLineEdit();
+
+    unit_label->setBuddy(unit);
+    unit_hbox->addWidget(unit);
+
+    layout->addLayout(unit_hbox);
+    layout->addStretch();
+
+    setLayout(layout);
+}
+
+void DisplayOptionsPage::setMapper(MonitoredDataMapper *mapper)
+{
+}
diff --git a/src/qt/optionsdialog.h b/src/qt/optionsdialog.h
index 07e85297d5..d5238a3664 100644
--- a/src/qt/optionsdialog.h
+++ b/src/qt/optionsdialog.h
@@ -11,6 +11,7 @@ class QPushButton;
 QT_END_NAMESPACE
 class OptionsModel;
 class MainOptionsPage;
+class DisplayOptionsPage;
 class MonitoredDataMapper;
 
 class OptionsDialog : public QDialog
@@ -24,7 +25,8 @@ public:
 signals:
 
 public slots:
-    void changePage(QListWidgetItem *current, QListWidgetItem *previous);
+    void changePage(int index);
+
 private slots:
     void okClicked();
     void cancelClicked();
@@ -34,11 +36,14 @@ private slots:
 private:
     QListWidget *contents_widget;
     QStackedWidget *pages_widget;
-    MainOptionsPage *main_options_page;
     OptionsModel *model;
     MonitoredDataMapper *mapper;
     QPushButton *apply_button;
 
+    // Pages
+    MainOptionsPage *main_page;
+    DisplayOptionsPage *display_page;
+
     void setupMainPage();
 };
 
diff --git a/src/qt/overviewpage.cpp b/src/qt/overviewpage.cpp
index d991f0d7ba..9515117c21 100644
--- a/src/qt/overviewpage.cpp
+++ b/src/qt/overviewpage.cpp
@@ -2,7 +2,7 @@
 #include "ui_overviewpage.h"
 
 #include "walletmodel.h"
-#include "guiutil.h"
+#include "bitcoinunits.h"
 
 OverviewPage::OverviewPage(QWidget *parent) :
     QWidget(parent),
@@ -34,8 +34,8 @@ OverviewPage::~OverviewPage()
 
 void OverviewPage::setBalance(qint64 balance, qint64 unconfirmedBalance)
 {
-    ui->labelBalance->setText(GUIUtil::formatMoney(balance) + QString(" BTC"));
-    ui->labelUnconfirmed->setText(GUIUtil::formatMoney(unconfirmedBalance) + QString(" BTC"));
+    ui->labelBalance->setText(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, balance));
+    ui->labelUnconfirmed->setText(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, unconfirmedBalance));
 }
 
 void OverviewPage::setNumTransactions(int count)
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 38a0a65520..58f9422b27 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -1,7 +1,7 @@
 #include "sendcoinsdialog.h"
 #include "ui_sendcoinsdialog.h"
 #include "walletmodel.h"
-#include "guiutil.h"
+#include "bitcoinunits.h"
 #include "addressbookpage.h"
 #include "optionsmodel.h"
 #include "sendcoinsentry.h"
@@ -71,7 +71,7 @@ void SendCoinsDialog::on_sendButton_clicked()
     QStringList formatted;
     foreach(const SendCoinsRecipient &rcp, recipients)
     {
-        formatted.append(tr("%1 BTC to %2 (%3)").arg(GUIUtil::formatMoney(rcp.amount), rcp.label, rcp.address));
+        formatted.append(tr("%1 to %2 (%3)").arg(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, rcp.amount), rcp.label, rcp.address));
     }
 
     QMessageBox::StandardButton retval = QMessageBox::question(this, tr("Confirm send coins"),
@@ -105,7 +105,7 @@ void SendCoinsDialog::on_sendButton_clicked()
     case WalletModel::AmountWithFeeExceedsBalance:
         QMessageBox::warning(this, tr("Send Coins"),
             tr("Total exceeds your balance when the %1 transaction fee is included").
-            arg(GUIUtil::formatMoney(sendstatus.fee)),
+            arg(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, sendstatus.fee)),
             QMessageBox::Ok, QMessageBox::Ok);
         break;
     case WalletModel::DuplicateAddress:
diff --git a/src/qt/sendcoinsentry.cpp b/src/qt/sendcoinsentry.cpp
index 2d4fe9b123..9fc041111f 100644
--- a/src/qt/sendcoinsentry.cpp
+++ b/src/qt/sendcoinsentry.cpp
@@ -1,6 +1,7 @@
 #include "sendcoinsentry.h"
 #include "ui_sendcoinsentry.h"
 #include "guiutil.h"
+#include "bitcoinunits.h"
 #include "addressbookpage.h"
 #include "walletmodel.h"
 #include "addresstablemodel.h"
@@ -103,7 +104,7 @@ SendCoinsRecipient SendCoinsEntry::getValue()
 
     rv.address = ui->payTo->text();
     rv.label = ui->addAsLabel->text();
-    GUIUtil::parseMoney(ui->payAmount->text(), &rv.amount);
+    BitcoinUnits::parse(BitcoinUnits::BTC, ui->payAmount->text(), &rv.amount);
 
     return rv;
 }
diff --git a/src/qt/transactiontablemodel.cpp b/src/qt/transactiontablemodel.cpp
index 7062ceecbd..2b8fe0b471 100644
--- a/src/qt/transactiontablemodel.cpp
+++ b/src/qt/transactiontablemodel.cpp
@@ -5,6 +5,7 @@
 #include "transactiondesc.h"
 #include "walletmodel.h"
 #include "addresstablemodel.h"
+#include "bitcoinunits.h"
 
 #include "headers.h"
 
@@ -397,7 +398,7 @@ QVariant TransactionTableModel::formatTxToAddress(const TransactionRecord *wtx)
 
 QVariant TransactionTableModel::formatTxAmount(const TransactionRecord *wtx, bool showUnconfirmed) const
 {
-    QString str = QString::fromStdString(FormatMoney(wtx->credit + wtx->debit));
+    QString str = BitcoinUnits::format(BitcoinUnits::BTC, wtx->credit + wtx->debit);
     if(showUnconfirmed)
     {
         if(!wtx->status.confirmed || wtx->status.maturity != TransactionStatus::Mature)
diff --git a/src/qt/transactionview.cpp b/src/qt/transactionview.cpp
index 50291fea42..f88b6fc123 100644
--- a/src/qt/transactionview.cpp
+++ b/src/qt/transactionview.cpp
@@ -5,7 +5,7 @@
 #include "walletmodel.h"
 #include "addresstablemodel.h"
 #include "transactiontablemodel.h"
-#include "guiutil.h"
+#include "bitcoinunits.h"
 #include "csvmodelwriter.h"
 #include "transactiondescdialog.h"
 #include "editaddressdialog.h"
@@ -227,7 +227,7 @@ void TransactionView::changedPrefix(const QString &prefix)
 void TransactionView::changedAmount(const QString &amount)
 {
     qint64 amount_parsed = 0;
-    if(GUIUtil::parseMoney(amount, &amount_parsed))
+    if(BitcoinUnits::parse(BitcoinUnits::BTC, amount, &amount_parsed))
     {
         transactionProxyModel->setMinAmount(amount_parsed);
     }