text: // Copyright (c) 2011-2014 The Bitcoin developers
  // Copyright (c) 2014-2015 The Dash developers
  // Copyright (c) 2015-2017 The PIVX developers
  // Copyright (c) 2018 The ADD developers
  // Distributed under the MIT/X11 software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "sendcoinsentry.h"
  #include "ui_sendcoinsentry.h"
  
  #include "addressbookpage.h"
  #include "addresstablemodel.h"
  #include "guiutil.h"
  #include "optionsmodel.h"
  #include "walletmodel.h"
  
  #include <QApplication>
  #include <QClipboard>
  
  SendCoinsEntry::SendCoinsEntry(QWidget* parent) : QStackedWidget(parent),
                                                    ui(new Ui::SendCoinsEntry),
                                                    model(0)
  {
      ui->setupUi(this);
  
      setCurrentWidget(ui->SendCoins);
  
  #ifdef Q_OS_MAC
      ui->payToLayout->setSpacing(4);
  #endif
  #if QT_VERSION >= 0x040700
      ui->addAsLabel->setPlaceholderText(tr("Enter a label for this address to add it to your address book"));
  #endif
  
      // normal add address field
      GUIUtil::setupAddressWidget(ui->payTo, this);
      // just a label for displaying add address(es)
      ui->payTo_is->setFont(GUIUtil::bitcoinAddressFont());
  
      // Connect signals
      connect(ui->payAmount, SIGNAL(valueChanged()), this, SIGNAL(payAmountChanged()));
      connect(ui->deleteButton, SIGNAL(clicked()), this, SLOT(deleteClicked()));
      connect(ui->deleteButton_is, SIGNAL(clicked()), this, SLOT(deleteClicked()));
      connect(ui->deleteButton_s, SIGNAL(clicked()), this, SLOT(deleteClicked()));
  }
  
  SendCoinsEntry::~SendCoinsEntry()
  {
      delete ui;
  }
  
  void SendCoinsEntry::on_pasteButton_clicked()
  {
      // Paste text from clipboard into recipient field
      ui->payTo->setText(QApplication::clipboard()->text());
  }
  
  void SendCoinsEntry::on_addressBookButton_clicked()
  {
      if (!model)
          return;
      AddressBookPage dlg(AddressBookPage::ForSelection, AddressBookPage::SendingTab, this);
      dlg.setModel(model->getAddressTableModel());
      if (dlg.exec()) {
          ui->payTo->setText(dlg.getReturnValue());
          ui->payAmount->setFocus();
      }
  }
  
  void SendCoinsEntry::on_payTo_textChanged(const QString& address)
  {
      updateLabel(address);
  }
  
  void SendCoinsEntry::setModel(WalletModel* model)
  {
      this->model = model;
  
      if (model && model->getOptionsModel())
          connect(model->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
  
      clear();
  }
  
  void SendCoinsEntry::clear()
  {
      // clear UI elements for normal payment
      ui->payTo->clear();
      ui->addAsLabel->clear();
      ui->payAmount->clear();
      ui->messageTextLabel->clear();
      ui->messageTextLabel->hide();
      ui->messageLabel->hide();
      // clear UI elements for insecure payment request
      ui->payTo_is->clear();
      ui->memoTextLabel_is->clear();
      ui->payAmount_is->clear();
      // clear UI elements for secure payment request
      ui->payTo_s->clear();
      ui->memoTextLabel_s->clear();
      ui->payAmount_s->clear();
  
      // update the display unit, to not use the default ("BTC")
      updateDisplayUnit();
  }
  
  void SendCoinsEntry::deleteClicked()
  {
      emit removeEntry(this);
  }
  
  bool SendCoinsEntry::validate()
  {
      if (!model)
          return false;
  
      // Check input validity
      bool retval = true;
  
      // Skip checks for payment request
      if (recipient.paymentRequest.IsInitialized())
          return retval;
  
      if (!model->validateAddress(ui->payTo->text())) {
          ui->payTo->setValid(false);
          retval = false;
      }
  
      if (!ui->payAmount->validate()) {
          retval = false;
      }
  
      // Sending a zero amount is invalid
      if (ui->payAmount->value(0) <= 0) {
          ui->payAmount->setValid(false);
          retval = false;
      }
  
      // Reject dust outputs:
      if (retval && GUIUtil::isDust(ui->payTo->text(), ui->payAmount->value())) {
          ui->payAmount->setValid(false);
          retval = false;
      }
  
      return retval;
  }
  
  SendCoinsRecipient SendCoinsEntry::getValue()
  {
      // Payment request
      if (recipient.paymentRequest.IsInitialized())
          return recipient;
  
      // Normal payment
      recipient.address = ui->payTo->text();
      recipient.label = ui->addAsLabel->text();
      recipient.amount = ui->payAmount->value();
      recipient.message = ui->messageTextLabel->text();
  
      return recipient;
  }
  
  QWidget* SendCoinsEntry::setupTabChain(QWidget* prev)
  {
      QWidget::setTabOrder(prev, ui->payTo);
      QWidget::setTabOrder(ui->payTo, ui->addAsLabel);
      QWidget* w = ui->payAmount->setupTabChain(ui->addAsLabel);
      QWidget::setTabOrder(w, ui->addressBookButton);
      QWidget::setTabOrder(ui->addressBookButton, ui->pasteButton);
      QWidget::setTabOrder(ui->pasteButton, ui->deleteButton);
      return ui->deleteButton;
  }
  
  void SendCoinsEntry::setValue(const SendCoinsRecipient& value)
  {
      recipient = value;
  
      if (recipient.paymentRequest.IsInitialized()) // payment request
      {
          if (recipient.authenticatedMerchant.isEmpty()) // insecure
          {
              ui->payTo_is->setText(recipient.address);
              ui->memoTextLabel_is->setText(recipient.message);
              ui->payAmount_is->setValue(recipient.amount);
              ui->payAmount_is->setReadOnly(true);
              setCurrentWidget(ui->SendCoins_InsecurePaymentRequest);
          } else // secure
          {
              ui->payTo_s->setText(recipient.authenticatedMerchant);
              ui->memoTextLabel_s->setText(recipient.message);
              ui->payAmount_s->setValue(recipient.amount);
              ui->payAmount_s->setReadOnly(true);
              setCurrentWidget(ui->SendCoins_SecurePaymentRequest);
          }
      } else // normal payment
      {
          // message
          ui->messageTextLabel->setText(recipient.message);
          ui->messageTextLabel->setVisible(!recipient.message.isEmpty());
          ui->messageLabel->setVisible(!recipient.message.isEmpty());
  
          ui->addAsLabel->clear();
          ui->payTo->setText(recipient.address); // this may set a label from addressbook
          if (!recipient.label.isEmpty())        // if a label had been set from the addressbook, dont overwrite with an empty label
              ui->addAsLabel->setText(recipient.label);
          ui->payAmount->setValue(recipient.amount);
      }
  }
  
  void SendCoinsEntry::setAddress(const QString& address)
  {
      ui->payTo->setText(address);
      ui->payAmount->setFocus();
  }
  
  bool SendCoinsEntry::isClear()
  {
      return ui->payTo->text().isEmpty() && ui->payTo_is->text().isEmpty() && ui->payTo_s->text().isEmpty();
  }
  
  void SendCoinsEntry::setFocus()
  {
      ui->payTo->setFocus();
  }
  
  void SendCoinsEntry::updateDisplayUnit()
  {
      if (model && model->getOptionsModel()) {
          // Update payAmount with the current unit
          ui->payAmount->setDisplayUnit(model->getOptionsModel()->getDisplayUnit());
          ui->payAmount_is->setDisplayUnit(model->getOptionsModel()->getDisplayUnit());
          ui->payAmount_s->setDisplayUnit(model->getOptionsModel()->getDisplayUnit());
      }
  }
  
  bool SendCoinsEntry::updateLabel(const QString& address)
  {
      if (!model)
          return false;
  
      // Fill in label from address book, if address has an associated label
      QString associatedLabel = model->getAddressTableModel()->labelForAddress(address);
      if (!associatedLabel.isEmpty()) {
          ui->addAsLabel->setText(associatedLabel);
          return true;
      }
  
      return false;
  }
  