sendcoinsdialog.cpp
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sendcoinsdialog.cpp
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	// Copyright (c) 2011-2014 The Bitcoin developers
	// Distributed under the MIT/X11 software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#include "sendcoinsdialog.h"
	#include "ui_sendcoinsdialog.h"

	#include "addresstablemodel.h"
	#include "bitcoinunits.h"
	#include "coincontroldialog.h"
	#include "guiutil.h"
	#include "optionsmodel.h"
	#include "sendcoinsentry.h"
	#include "walletmodel.h"

	#include "base58.h"
	#include "coincontrol.h"
	#include "ui_interface.h"

	#include <QMessageBox>
	#include <QScrollBar>
	#include <QTextDocument>

	SendCoinsDialog::SendCoinsDialog(QWidget *parent) :
	QDialog(parent),
	ui(new Ui::SendCoinsDialog),
	model(0)
	{
	ui->setupUi(this);

	#ifdef Q_OS_MAC // Icons on push buttons are very uncommon on Mac
	ui->addButton->setIcon(QIcon());
	ui->clearButton->setIcon(QIcon());
	ui->sendButton->setIcon(QIcon());
	#endif

	GUIUtil::setupAddressWidget(ui->lineEditCoinControlChange, this);

	addEntry();

	connect(ui->addButton, SIGNAL(clicked()), this, SLOT(addEntry()));
	connect(ui->clearButton, SIGNAL(clicked()), this, SLOT(clear()));

	// Coin Control
	connect(ui->pushButtonCoinControl, SIGNAL(clicked()), this, SLOT(coinControlButtonClicked()));
	connect(ui->checkBoxCoinControlChange, SIGNAL(stateChanged(int)), this, SLOT(coinControlChangeChecked(int)));
	connect(ui->lineEditCoinControlChange, SIGNAL(textEdited(const QString &)), this, SLOT(coinControlChangeEdited(const QString &)));

	// Coin Control: clipboard actions
	QAction *clipboardQuantityAction = new QAction(tr("Copy quantity"), this);
	QAction *clipboardAmountAction = new QAction(tr("Copy amount"), this);
	QAction *clipboardFeeAction = new QAction(tr("Copy fee"), this);
	QAction *clipboardAfterFeeAction = new QAction(tr("Copy after fee"), this);
	QAction *clipboardBytesAction = new QAction(tr("Copy bytes"), this);
	QAction *clipboardPriorityAction = new QAction(tr("Copy priority"), this);
	QAction *clipboardLowOutputAction = new QAction(tr("Copy dust"), this);
	QAction *clipboardChangeAction = new QAction(tr("Copy change"), this);
	connect(clipboardQuantityAction, SIGNAL(triggered()), this, SLOT(coinControlClipboardQuantity()));
	connect(clipboardAmountAction, SIGNAL(triggered()), this, SLOT(coinControlClipboardAmount()));
	connect(clipboardFeeAction, SIGNAL(triggered()), this, SLOT(coinControlClipboardFee()));
	connect(clipboardAfterFeeAction, SIGNAL(triggered()), this, SLOT(coinControlClipboardAfterFee()));
	connect(clipboardBytesAction, SIGNAL(triggered()), this, SLOT(coinControlClipboardBytes()));
	connect(clipboardPriorityAction, SIGNAL(triggered()), this, SLOT(coinControlClipboardPriority()));
	connect(clipboardLowOutputAction, SIGNAL(triggered()), this, SLOT(coinControlClipboardLowOutput()));
	connect(clipboardChangeAction, SIGNAL(triggered()), this, SLOT(coinControlClipboardChange()));
	ui->labelCoinControlQuantity->addAction(clipboardQuantityAction);
	ui->labelCoinControlAmount->addAction(clipboardAmountAction);
	ui->labelCoinControlFee->addAction(clipboardFeeAction);
	ui->labelCoinControlAfterFee->addAction(clipboardAfterFeeAction);
	ui->labelCoinControlBytes->addAction(clipboardBytesAction);
	ui->labelCoinControlPriority->addAction(clipboardPriorityAction);
	ui->labelCoinControlLowOutput->addAction(clipboardLowOutputAction);
	ui->labelCoinControlChange->addAction(clipboardChangeAction);

	fNewRecipientAllowed = true;
	}

	void SendCoinsDialog::setModel(WalletModel *model)
	{
	this->model = model;

	if(model && model->getOptionsModel())
	{
	for(int i = 0; i < ui->entries->count(); ++i)
	{
	SendCoinsEntry entry = qobject_cast<SendCoinsEntry>(ui->entries->itemAt(i)->widget());
	if(entry)
	{
	entry->setModel(model);
	}
	}

	setBalance(model->getBalance(), model->getUnconfirmedBalance(), model->getImmatureBalance(),
	model->getWatchBalance(), model->getWatchUnconfirmedBalance(), model->getWatchImmatureBalance());
	connect(model, SIGNAL(balanceChanged(qint64, qint64, qint64, qint64, qint64, qint64)), this, SLOT(setBalance(qint64, qint64, qint64, qint64, qint64, qint64)));
	connect(model->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));

	// Coin Control
	connect(model->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(coinControlUpdateLabels()));
	connect(model->getOptionsModel(), SIGNAL(coinControlFeaturesChanged(bool)), this, SLOT(coinControlFeatureChanged(bool)));
	connect(model->getOptionsModel(), SIGNAL(transactionFeeChanged(qint64)), this, SLOT(coinControlUpdateLabels()));
	ui->frameCoinControl->setVisible(model->getOptionsModel()->getCoinControlFeatures());
	coinControlUpdateLabels();
	}
	}

	SendCoinsDialog::~SendCoinsDialog()
	{
	delete ui;
	}

	void SendCoinsDialog::on_sendButton_clicked()
	{
	if(!model \|\| !model->getOptionsModel())
	return;

	QList<SendCoinsRecipient> recipients;
	bool valid = true;

	for(int i = 0; i < ui->entries->count(); ++i)
	{
	SendCoinsEntry entry = qobject_cast<SendCoinsEntry>(ui->entries->itemAt(i)->widget());
	if(entry)
	{
	if(entry->validate())
	{
	recipients.append(entry->getValue());
	}
	else
	{
	valid = false;
	}
	}
	}

	if(!valid \|\| recipients.isEmpty())
	{
	return;
	}

	// Format confirmation message
	QStringList formatted;
	foreach(const SendCoinsRecipient &rcp, recipients)
	{
	// generate bold amount string
	QString amount = "<b>" + BitcoinUnits::formatHtmlWithUnit(model->getOptionsModel()->getDisplayUnit(), rcp.amount);
	amount.append("</b>");
	// generate monospace address string
	QString address = "<span style='font-family: monospace;'>" + rcp.address;
	address.append("</span>");

	QString recipientElement;

	if (!rcp.paymentRequest.IsInitialized()) // normal payment
	{
	if(rcp.label.length() > 0) // label with address
	{
	recipientElement = tr("%1 to %2").arg(amount, GUIUtil::HtmlEscape(rcp.label));
	recipientElement.append(QString(" (%1)").arg(address));
	}
	else // just address
	{
	recipientElement = tr("%1 to %2").arg(amount, address);
	}
	}
	else if(!rcp.authenticatedMerchant.isEmpty()) // secure payment request
	{
	recipientElement = tr("%1 to %2").arg(amount, GUIUtil::HtmlEscape(rcp.authenticatedMerchant));
	}
	else // insecure payment request
	{
	recipientElement = tr("%1 to %2").arg(amount, address);
	}

	formatted.append(recipientElement);
	}

	fNewRecipientAllowed = false;


	WalletModel::UnlockContext ctx(model->requestUnlock());
	if(!ctx.isValid())
	{
	// Unlock wallet was cancelled
	fNewRecipientAllowed = true;
	return;
	}

	// prepare transaction for getting txFee earlier
	WalletModelTransaction currentTransaction(recipients);
	WalletModel::SendCoinsReturn prepareStatus;
	if (model->getOptionsModel()->getCoinControlFeatures()) // coin control enabled
	prepareStatus = model->prepareTransaction(currentTransaction, CoinControlDialog::coinControl);
	else
	prepareStatus = model->prepareTransaction(currentTransaction);

	// process prepareStatus and on error generate message shown to user
	processSendCoinsReturn(prepareStatus,
	BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), currentTransaction.getTransactionFee()));

	if(prepareStatus.status != WalletModel::OK) {
	fNewRecipientAllowed = true;
	return;
	}

	qint64 txFee = currentTransaction.getTransactionFee();
	QString questionString = tr("Are you sure you want to send?");
	questionString.append("<br /><br />%1");

	if(txFee > 0)
	{
	// append fee string if a fee is required
	questionString.append("<hr /><span style='color:#aa0000;'>");
	questionString.append(BitcoinUnits::formatHtmlWithUnit(model->getOptionsModel()->getDisplayUnit(), txFee));
	questionString.append("</span> ");
	questionString.append(tr("added as transaction fee"));
	}

	// add total amount in all subdivision units
	questionString.append("<hr />");
	qint64 totalAmount = currentTransaction.getTotalTransactionAmount() + txFee;
	QStringList alternativeUnits;
	foreach(BitcoinUnits::Unit u, BitcoinUnits::availableUnits())
	{
	if(u != model->getOptionsModel()->getDisplayUnit())
	alternativeUnits.append(BitcoinUnits::formatHtmlWithUnit(u, totalAmount));
	}
	questionString.append(tr("Total Amount %1 (= %2)")
	.arg(BitcoinUnits::formatHtmlWithUnit(model->getOptionsModel()->getDisplayUnit(), totalAmount))
	.arg(alternativeUnits.join(" " + tr("or") + " ")));

	QMessageBox::StandardButton retval = QMessageBox::question(this, tr("Confirm send coins"),
	questionString.arg(formatted.join("<br />")),
	QMessageBox::Yes \| QMessageBox::Cancel,
	QMessageBox::Cancel);

	if(retval != QMessageBox::Yes)
	{
	fNewRecipientAllowed = true;
	return;
	}

	// now send the prepared transaction
	WalletModel::SendCoinsReturn sendStatus = model->sendCoins(currentTransaction);
	// process sendStatus and on error generate message shown to user
	processSendCoinsReturn(sendStatus);

	if (sendStatus.status == WalletModel::OK)
	{
	accept();
	CoinControlDialog::coinControl->UnSelectAll();
	coinControlUpdateLabels();
	}
	fNewRecipientAllowed = true;
	}

	void SendCoinsDialog::clear()
	{
	// Remove entries until only one left
	while(ui->entries->count())
	{
	ui->entries->takeAt(0)->widget()->deleteLater();
	}
	addEntry();

	updateTabsAndLabels();
	}

	void SendCoinsDialog::reject()
	{
	clear();
	}

	void SendCoinsDialog::accept()
	{
	clear();
	}

	SendCoinsEntry *SendCoinsDialog::addEntry()
	{
	SendCoinsEntry *entry = new SendCoinsEntry(this);
	entry->setModel(model);
	ui->entries->addWidget(entry);
	connect(entry, SIGNAL(removeEntry(SendCoinsEntry)), this, SLOT(removeEntry(SendCoinsEntry)));
	connect(entry, SIGNAL(payAmountChanged()), this, SLOT(coinControlUpdateLabels()));

	updateTabsAndLabels();

	// Focus the field, so that entry can start immediately
	entry->clear();
	entry->setFocus();
	ui->scrollAreaWidgetContents->resize(ui->scrollAreaWidgetContents->sizeHint());
	qApp->processEvents();
	QScrollBar* bar = ui->scrollArea->verticalScrollBar();
	if(bar)
	bar->setSliderPosition(bar->maximum());
	return entry;
	}

	void SendCoinsDialog::updateTabsAndLabels()
	{
	setupTabChain(0);
	coinControlUpdateLabels();
	}

	void SendCoinsDialog::removeEntry(SendCoinsEntry* entry)
	{
	entry->hide();

	// If the last entry is about to be removed add an empty one
	if (ui->entries->count() == 1)
	addEntry();

	entry->deleteLater();

	updateTabsAndLabels();
	}

	QWidget SendCoinsDialog::setupTabChain(QWidget prev)
	{
	for(int i = 0; i < ui->entries->count(); ++i)
	{
	SendCoinsEntry entry = qobject_cast<SendCoinsEntry>(ui->entries->itemAt(i)->widget());
	if(entry)
	{
	prev = entry->setupTabChain(prev);
	}
	}
	QWidget::setTabOrder(prev, ui->sendButton);
	QWidget::setTabOrder(ui->sendButton, ui->clearButton);
	QWidget::setTabOrder(ui->clearButton, ui->addButton);
	return ui->addButton;
	}

	void SendCoinsDialog::setAddress(const QString &address)
	{
	SendCoinsEntry *entry = 0;
	// Replace the first entry if it is still unused
	if(ui->entries->count() == 1)
	{
	SendCoinsEntry first = qobject_cast<SendCoinsEntry>(ui->entries->itemAt(0)->widget());
	if(first->isClear())
	{
	entry = first;
	}
	}
	if(!entry)
	{
	entry = addEntry();
	}

	entry->setAddress(address);
	}

	void SendCoinsDialog::pasteEntry(const SendCoinsRecipient &rv)
	{
	if(!fNewRecipientAllowed)
	return;

	SendCoinsEntry *entry = 0;
	// Replace the first entry if it is still unused
	if(ui->entries->count() == 1)
	{
	SendCoinsEntry first = qobject_cast<SendCoinsEntry>(ui->entries->itemAt(0)->widget());
	if(first->isClear())
	{
	entry = first;
	}
	}
	if(!entry)
	{
	entry = addEntry();
	}

	entry->setValue(rv);
	updateTabsAndLabels();
	}

	bool SendCoinsDialog::handlePaymentRequest(const SendCoinsRecipient &rv)
	{
	// Just paste the entry, all pre-checks
	// are done in paymentserver.cpp.
	pasteEntry(rv);
	return true;
	}

	void SendCoinsDialog::setBalance(qint64 balance, qint64 unconfirmedBalance, qint64 immatureBalance,
	qint64 watchBalance, qint64 watchUnconfirmedBalance, qint64 watchImmatureBalance)
	{
	Q_UNUSED(unconfirmedBalance);
	Q_UNUSED(immatureBalance);
	Q_UNUSED(watchBalance);
	Q_UNUSED(watchUnconfirmedBalance);
	Q_UNUSED(watchImmatureBalance);

	if(model && model->getOptionsModel())
	{
	ui->labelBalance->setText(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), balance));
	}
	}

	void SendCoinsDialog::updateDisplayUnit()
	{
	setBalance(model->getBalance(), 0, 0, 0, 0, 0);
	}

	void SendCoinsDialog::processSendCoinsReturn(const WalletModel::SendCoinsReturn &sendCoinsReturn, const QString &msgArg)
	{
	QPair<QString, CClientUIInterface::MessageBoxFlags> msgParams;
	// Default to a warning message, override if error message is needed
	msgParams.second = CClientUIInterface::MSG_WARNING;

	// This comment is specific to SendCoinsDialog usage of WalletModel::SendCoinsReturn.
	// WalletModel::TransactionCommitFailed is used only in WalletModel::sendCoins()
	// all others are used only in WalletModel::prepareTransaction()
	switch(sendCoinsReturn.status)
	{
	case WalletModel::InvalidAddress:
	msgParams.first = tr("The recipient address is not valid, please recheck.");
	break;
	case WalletModel::InvalidAmount:
	msgParams.first = tr("The amount to pay must be larger than 0.");
	break;
	case WalletModel::AmountExceedsBalance:
	msgParams.first = tr("The amount exceeds your balance.");
	break;
	case WalletModel::AmountWithFeeExceedsBalance:
	msgParams.first = tr("The total exceeds your balance when the %1 transaction fee is included.").arg(msgArg);
	break;
	case WalletModel::DuplicateAddress:
	msgParams.first = tr("Duplicate address found, can only send to each address once per send operation.");
	break;
	case WalletModel::TransactionCreationFailed:
	msgParams.first = tr("Transaction creation failed!");
	msgParams.second = CClientUIInterface::MSG_ERROR;
	break;
	case WalletModel::TransactionCommitFailed:
	msgParams.first = tr("The transaction was rejected! This might happen if some of the coins in your wallet were already spent, such as if you used a copy of wallet.dat and coins were spent in the copy but not marked as spent here.");
	msgParams.second = CClientUIInterface::MSG_ERROR;
	break;
	// included to prevent a compiler warning.
	case WalletModel::OK:
	default:
	return;
	}

	emit message(tr("Send Coins"), msgParams.first, msgParams.second);
	}

	// Coin Control: copy label "Quantity" to clipboard
	void SendCoinsDialog::coinControlClipboardQuantity()
	{
	GUIUtil::setClipboard(ui->labelCoinControlQuantity->text());
	}

	// Coin Control: copy label "Amount" to clipboard
	void SendCoinsDialog::coinControlClipboardAmount()
	{
	GUIUtil::setClipboard(ui->labelCoinControlAmount->text().left(ui->labelCoinControlAmount->text().indexOf(" ")));
	}

	// Coin Control: copy label "Fee" to clipboard
	void SendCoinsDialog::coinControlClipboardFee()
	{
	GUIUtil::setClipboard(ui->labelCoinControlFee->text().left(ui->labelCoinControlFee->text().indexOf(" ")));
	}

	// Coin Control: copy label "After fee" to clipboard
	void SendCoinsDialog::coinControlClipboardAfterFee()
	{
	GUIUtil::setClipboard(ui->labelCoinControlAfterFee->text().left(ui->labelCoinControlAfterFee->text().indexOf(" ")));
	}

	// Coin Control: copy label "Bytes" to clipboard
	void SendCoinsDialog::coinControlClipboardBytes()
	{
	GUIUtil::setClipboard(ui->labelCoinControlBytes->text());
	}

	// Coin Control: copy label "Priority" to clipboard
	void SendCoinsDialog::coinControlClipboardPriority()
	{
	GUIUtil::setClipboard(ui->labelCoinControlPriority->text());
	}

	// Coin Control: copy label "Dust" to clipboard
	void SendCoinsDialog::coinControlClipboardLowOutput()
	{
	GUIUtil::setClipboard(ui->labelCoinControlLowOutput->text());
	}

	// Coin Control: copy label "Change" to clipboard
	void SendCoinsDialog::coinControlClipboardChange()
	{
	GUIUtil::setClipboard(ui->labelCoinControlChange->text().left(ui->labelCoinControlChange->text().indexOf(" ")));
	}

	// Coin Control: settings menu - coin control enabled/disabled by user
	void SendCoinsDialog::coinControlFeatureChanged(bool checked)
	{
	ui->frameCoinControl->setVisible(checked);

	if (!checked && model) // coin control features disabled
	CoinControlDialog::coinControl->SetNull();

	if (checked)
	coinControlUpdateLabels();
	}

	// Coin Control: button inputs -> show actual coin control dialog
	void SendCoinsDialog::coinControlButtonClicked()
	{
	CoinControlDialog dlg;
	dlg.setModel(model);
	dlg.exec();
	coinControlUpdateLabels();
	}

	// Coin Control: checkbox custom change address
	void SendCoinsDialog::coinControlChangeChecked(int state)
	{
	if (state == Qt::Unchecked)
	{
	CoinControlDialog::coinControl->destChange = CNoDestination();
	ui->labelCoinControlChangeLabel->clear();
	}
	else
	// use this to re-validate an already entered address
	coinControlChangeEdited(ui->lineEditCoinControlChange->text());

	ui->lineEditCoinControlChange->setEnabled((state == Qt::Checked));
	}

	// Coin Control: custom change address changed
	void SendCoinsDialog::coinControlChangeEdited(const QString& text)
	{
	if (model && model->getAddressTableModel())
	{
	// Default to no change address until verified
	CoinControlDialog::coinControl->destChange = CNoDestination();
	ui->labelCoinControlChangeLabel->setStyleSheet("QLabel{color:red;}");

	CBitcoinAddress addr = CBitcoinAddress(text.toStdString());

	if (text.isEmpty()) // Nothing entered
	{
	ui->labelCoinControlChangeLabel->setText("");
	}
	else if (!addr.IsValid()) // Invalid address
	{
	ui->labelCoinControlChangeLabel->setText(tr("Warning: Invalid Bitcoin address"));
	}
	else // Valid address
	{
	CPubKey pubkey;
	CKeyID keyid;
	addr.GetKeyID(keyid);
	if (!model->getPubKey(keyid, pubkey)) // Unknown change address
	{
	ui->labelCoinControlChangeLabel->setText(tr("Warning: Unknown change address"));
	}
	else // Known change address
	{
	ui->labelCoinControlChangeLabel->setStyleSheet("QLabel{color:black;}");

	// Query label
	QString associatedLabel = model->getAddressTableModel()->labelForAddress(text);
	if (!associatedLabel.isEmpty())
	ui->labelCoinControlChangeLabel->setText(associatedLabel);
	else
	ui->labelCoinControlChangeLabel->setText(tr("(no label)"));

	CoinControlDialog::coinControl->destChange = addr.Get();
	}
	}
	}
	}

	// Coin Control: update labels
	void SendCoinsDialog::coinControlUpdateLabels()
	{
	if (!model \|\| !model->getOptionsModel() \|\| !model->getOptionsModel()->getCoinControlFeatures())
	return;

	// set pay amounts
	CoinControlDialog::payAmounts.clear();
	for(int i = 0; i < ui->entries->count(); ++i)
	{
	SendCoinsEntry entry = qobject_cast<SendCoinsEntry>(ui->entries->itemAt(i)->widget());
	if(entry)
	CoinControlDialog::payAmounts.append(entry->getValue().amount);
	}

	if (CoinControlDialog::coinControl->HasSelected())
	{
	// actual coin control calculation
	CoinControlDialog::updateLabels(model, this);

	// show coin control stats
	ui->labelCoinControlAutomaticallySelected->hide();
	ui->widgetCoinControl->show();
	}
	else
	{
	// hide coin control stats
	ui->labelCoinControlAutomaticallySelected->show();
	ui->widgetCoinControl->hide();
	ui->labelCoinControlInsuffFunds->hide();
	}
	}

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