text: // Copyright (c) 2011-2013 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 "sendcoinsentry.h"
  #include "ui_sendcoinsentry.h"
  
  #include "guiutil.h"
  #include "bitcoinunits.h"
  #include "addressbookpage.h"
  #include "walletmodel.h"
  #include "optionsmodel.h"
  #include "addresstablemodel.h"
  
  #include <QApplication>
  #include <QClipboard>
  
  SendCoinsEntry::SendCoinsEntry(QWidget *parent) :
      QFrame(parent),
      ui(new Ui::SendCoinsEntry),
      model(0)
  {
      ui->setupUi(this);
  
  #ifdef Q_OS_MAC
      ui->payToLayout->setSpacing(4);
  #endif
  #if QT_VERSION >= 0x040700
      /* Do not move this to the XML file, Qt before 4.7 will choke on it */
      ui->addAsLabel->setPlaceholderText(tr("Enter a label for this address to add it to your address book"));
      ui->payTo->setPlaceholderText(tr("Enter a Reactcoin address (e.g. Ler4HNAEfwYhBmGXcFP2Po1NpRUEiK8km2)"));
  #endif
      setFocusPolicy(Qt::TabFocus);
      setFocusProxy(ui->payTo);
  
      GUIUtil::setupAddressWidget(ui->payTo, this);
  }
  
  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::ForSending, 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)
  {
      if(!model)
          return;
      // 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);
  }
  
  void SendCoinsEntry::setModel(WalletModel *model)
  {
      this->model = model;
  
      if(model && model->getOptionsModel())
          connect(model->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
  
      connect(ui->payAmount, SIGNAL(textChanged()), this, SIGNAL(payAmountChanged()));
  
      clear();
  }
  
  void SendCoinsEntry::setRemoveEnabled(bool enabled)
  {
      ui->deleteButton->setEnabled(enabled);
  }
  
  void SendCoinsEntry::clear()
  {
      ui->payTo->clear();
      ui->addAsLabel->clear();
      ui->payAmount->clear();
      ui->payTo->setFocus();
      // update the display unit, to not use the default ("BTC")
      updateDisplayUnit();
  }
  
  void SendCoinsEntry::on_deleteButton_clicked()
  {
      emit removeEntry(this);
  }
  
  bool SendCoinsEntry::validate()
  {
      // Check input validity
      bool retval = true;
  
      if(!ui->payAmount->validate())
      {
          retval = false;
      }
      else
      {
          if(ui->payAmount->value() <= 0)
          {
              // Cannot send 0 coins or less
              ui->payAmount->setValid(false);
              retval = false;
          }
      }
  
      if(!ui->payTo->hasAcceptableInput() ||
         (model && !model->validateAddress(ui->payTo->text())))
      {
          ui->payTo->setValid(false);
          retval = false;
      }
  
      return retval;
  }
  
  SendCoinsRecipient SendCoinsEntry::getValue()
  {
      SendCoinsRecipient rv;
  
      rv.address = ui->payTo->text();
      rv.label = ui->addAsLabel->text();
      rv.amount = ui->payAmount->value();
  
      return rv;
  }
  
  QWidget *SendCoinsEntry::setupTabChain(QWidget *prev)
  {
      QWidget::setTabOrder(prev, ui->payTo);
      QWidget::setTabOrder(ui->payTo, ui->addressBookButton);
      QWidget::setTabOrder(ui->addressBookButton, ui->pasteButton);
      QWidget::setTabOrder(ui->pasteButton, ui->deleteButton);
      QWidget::setTabOrder(ui->deleteButton, ui->addAsLabel);
      return ui->payAmount->setupTabChain(ui->addAsLabel);
  }
  
  void SendCoinsEntry::setValue(const SendCoinsRecipient &value)
  {
      ui->payTo->setText(value.address);
      ui->addAsLabel->setText(value.label);
      ui->payAmount->setValue(value.amount);
  }
  
  void SendCoinsEntry::setAddress(const QString &address)
  {
      ui->payTo->setText(address);
      ui->payAmount->setFocus();
  }
  
  bool SendCoinsEntry::isClear()
  {
      return ui->payTo->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());
      }
  }
  