text: // Copyright (c) 2011-2015 The Bitcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "receivecoinsdialog.h"
  #include "ui_receivecoinsdialog.h"
  
  #include "addressbookpage.h"
  #include "addresstablemodel.h"
  #include "bitcoinunits.h"
  #include "guiutil.h"
  #include "optionsmodel.h"
  #include "platformstyle.h"
  #include "receiverequestdialog.h"
  #include "recentrequeststablemodel.h"
  #include "walletmodel.h"
  
  #include <QAction>
  #include <QCursor>
  #include <QItemSelection>
  #include <QMessageBox>
  #include <QScrollBar>
  #include <QTextDocument>
  
  ReceiveCoinsDialog::ReceiveCoinsDialog(const PlatformStyle *platformStyle, QWidget *parent) :
      QDialog(parent),
      ui(new Ui::ReceiveCoinsDialog),
      columnResizingFixer(0),
      model(0),
      platformStyle(platformStyle)
  {
      ui->setupUi(this);
      QString theme = GUIUtil::getThemeName();
      
      ui->label_5->setVisible(false);
  
      if (!platformStyle->getImagesOnButtons()) {
          ui->clearButton->setIcon(QIcon());
          ui->receiveButton->setIcon(QIcon());
          ui->showRequestButton->setIcon(QIcon());
          ui->removeRequestButton->setIcon(QIcon());
      } else {
          ui->clearButton->setIcon(QIcon(":/icons/" + theme + "/remove"));
          ui->receiveButton->setIcon(QIcon(":/icons/" + theme + "/receiving_addresses"));
          ui->showRequestButton->setIcon(QIcon(":/icons/" + theme + "/edit"));
          ui->removeRequestButton->setIcon(QIcon(":/icons/" + theme + "/remove"));
      }
  
      // context menu actions
      QAction *copyURIAction = new QAction(tr("Copy URI"), this);
      QAction *copyLabelAction = new QAction(tr("Copy label"), this);
      QAction *copyMessageAction = new QAction(tr("Copy message"), this);
      QAction *copyAmountAction = new QAction(tr("Copy amount"), this);
  
      // context menu
      contextMenu = new QMenu(this);
      contextMenu->addAction(copyURIAction);
      contextMenu->addAction(copyLabelAction);
      contextMenu->addAction(copyMessageAction);
      contextMenu->addAction(copyAmountAction);
  
      // context menu signals
      connect(ui->recentRequestsView, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(showMenu(QPoint)));
      connect(copyURIAction, SIGNAL(triggered()), this, SLOT(copyURI()));
      connect(copyLabelAction, SIGNAL(triggered()), this, SLOT(copyLabel()));
      connect(copyMessageAction, SIGNAL(triggered()), this, SLOT(copyMessage()));
      connect(copyAmountAction, SIGNAL(triggered()), this, SLOT(copyAmount()));
  
      connect(ui->clearButton, SIGNAL(clicked()), this, SLOT(clear()));
  }
  
  void ReceiveCoinsDialog::setModel(WalletModel *model)
  {
      this->model = model;
  
      if(model && model->getOptionsModel())
      {
          model->getRecentRequestsTableModel()->sort(RecentRequestsTableModel::Date, Qt::DescendingOrder);
          connect(model->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
          updateDisplayUnit();
  
          QTableView* tableView = ui->recentRequestsView;
  
          tableView->verticalHeader()->hide();
          tableView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
          tableView->setModel(model->getRecentRequestsTableModel());
          tableView->setAlternatingRowColors(true);
          tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
          tableView->setSelectionMode(QAbstractItemView::ContiguousSelection);
          tableView->setColumnWidth(RecentRequestsTableModel::Date, DATE_COLUMN_WIDTH);
          tableView->setColumnWidth(RecentRequestsTableModel::Label, LABEL_COLUMN_WIDTH);
  
          connect(tableView->selectionModel(),
              SIGNAL(selectionChanged(QItemSelection, QItemSelection)), this,
              SLOT(recentRequestsView_selectionChanged(QItemSelection, QItemSelection)));
          // Last 2 columns are set by the columnResizingFixer, when the table geometry is ready.
          columnResizingFixer = new GUIUtil::TableViewLastColumnResizingFixer(tableView, AMOUNT_MINIMUM_COLUMN_WIDTH, DATE_COLUMN_WIDTH, this);
      }
  }
  
  ReceiveCoinsDialog::~ReceiveCoinsDialog()
  {
      delete ui;
  }
  
  void ReceiveCoinsDialog::clear()
  {
      ui->reqAmount->clear();
      ui->reqLabel->setText("");
      ui->reqMessage->setText("");
      ui->reuseAddress->setChecked(false);
      updateDisplayUnit();
  }
  
  void ReceiveCoinsDialog::reject()
  {
      clear();
  }
  
  void ReceiveCoinsDialog::accept()
  {
      clear();
  }
  
  void ReceiveCoinsDialog::updateDisplayUnit()
  {
      if(model && model->getOptionsModel())
      {
          ui->reqAmount->setDisplayUnit(model->getOptionsModel()->getDisplayUnit());
      }
  }
  
  void ReceiveCoinsDialog::on_receiveButton_clicked()
  {
      if(!model || !model->getOptionsModel() || !model->getAddressTableModel() || !model->getRecentRequestsTableModel())
          return;
  
      QString address;
      QString label = ui->reqLabel->text();
      if(ui->reuseAddress->isChecked())
      {
          /* Choose existing receiving address */
          AddressBookPage dlg(platformStyle, AddressBookPage::ForSelection, AddressBookPage::ReceivingTab, this);
          dlg.setModel(model->getAddressTableModel());
          if(dlg.exec())
          {
              address = dlg.getReturnValue();
              if(label.isEmpty()) /* If no label provided, use the previously used label */
              {
                  label = model->getAddressTableModel()->labelForAddress(address);
              }
          } else {
              return;
          }
      } else {
          /* Generate new receiving address */
          address = model->getAddressTableModel()->addRow(AddressTableModel::Receive, label, "");
      }
      SendCoinsRecipient info(address, label,
          ui->reqAmount->value(), ui->reqMessage->text());
      info.fUseInstantSend = ui->checkUseInstantSend->isChecked();
      ReceiveRequestDialog *dialog = new ReceiveRequestDialog(this);
      dialog->setAttribute(Qt::WA_DeleteOnClose);
      dialog->setModel(model->getOptionsModel());
      dialog->setInfo(info);
      dialog->show();
      clear();
  
      /* Store request for later reference */
      model->getRecentRequestsTableModel()->addNewRequest(info);
  }
  
  void ReceiveCoinsDialog::on_recentRequestsView_doubleClicked(const QModelIndex &index)
  {
      const RecentRequestsTableModel *submodel = model->getRecentRequestsTableModel();
      ReceiveRequestDialog *dialog = new ReceiveRequestDialog(this);
      dialog->setModel(model->getOptionsModel());
      dialog->setInfo(submodel->entry(index.row()).recipient);
      dialog->setAttribute(Qt::WA_DeleteOnClose);
      dialog->show();
  }
  
  void ReceiveCoinsDialog::recentRequestsView_selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
  {
      // Enable Show/Remove buttons only if anything is selected.
      bool enable = !ui->recentRequestsView->selectionModel()->selectedRows().isEmpty();
      ui->showRequestButton->setEnabled(enable);
      ui->removeRequestButton->setEnabled(enable);
  }
  
  void ReceiveCoinsDialog::on_showRequestButton_clicked()
  {
      if(!model || !model->getRecentRequestsTableModel() || !ui->recentRequestsView->selectionModel())
          return;
      QModelIndexList selection = ui->recentRequestsView->selectionModel()->selectedRows();
  
      Q_FOREACH (const QModelIndex& index, selection) {
          on_recentRequestsView_doubleClicked(index);
      }
  }
  
  void ReceiveCoinsDialog::on_removeRequestButton_clicked()
  {
      if(!model || !model->getRecentRequestsTableModel() || !ui->recentRequestsView->selectionModel())
          return;
      QModelIndexList selection = ui->recentRequestsView->selectionModel()->selectedRows();
      if(selection.empty())
          return;
      // correct for selection mode ContiguousSelection
      QModelIndex firstIndex = selection.at(0);
      model->getRecentRequestsTableModel()->removeRows(firstIndex.row(), selection.length(), firstIndex.parent());
  }
  
  // We override the virtual resizeEvent of the QWidget to adjust tables column
  // sizes as the tables width is proportional to the dialogs width.
  void ReceiveCoinsDialog::resizeEvent(QResizeEvent *event)
  {
      QWidget::resizeEvent(event);
      columnResizingFixer->stretchColumnWidth(RecentRequestsTableModel::Message);
  }
  
  void ReceiveCoinsDialog::keyPressEvent(QKeyEvent *event)
  {
      if (event->key() == Qt::Key_Return)
      {
          // press return -> submit form
          if (ui->reqLabel->hasFocus() || ui->reqAmount->hasFocus() || ui->reqMessage->hasFocus())
          {
              event->ignore();
              on_receiveButton_clicked();
              return;
          }
      }
  
      this->QDialog::keyPressEvent(event);
  }
  
  QModelIndex ReceiveCoinsDialog::selectedRow()
  {
      if(!model || !model->getRecentRequestsTableModel() || !ui->recentRequestsView->selectionModel())
          return QModelIndex();
      QModelIndexList selection = ui->recentRequestsView->selectionModel()->selectedRows();
      if(selection.empty())
          return QModelIndex();
      // correct for selection mode ContiguousSelection
      QModelIndex firstIndex = selection.at(0);
      return firstIndex;
  }
  
  // copy column of selected row to clipboard
  void ReceiveCoinsDialog::copyColumnToClipboard(int column)
  {
      QModelIndex firstIndex = selectedRow();
      if (!firstIndex.isValid()) {
          return;
      }
      GUIUtil::setClipboard(model->getRecentRequestsTableModel()->data(firstIndex.child(firstIndex.row(), column), Qt::EditRole).toString());
  }
  
  // context menu
  void ReceiveCoinsDialog::showMenu(const QPoint &point)
  {
      if (!selectedRow().isValid()) {
          return;
      }
      contextMenu->exec(QCursor::pos());
  }
  
  // context menu action: copy URI
  void ReceiveCoinsDialog::copyURI()
  {
      QModelIndex sel = selectedRow();
      if (!sel.isValid()) {
          return;
      }
  
      const RecentRequestsTableModel * const submodel = model->getRecentRequestsTableModel();
      const QString uri = GUIUtil::formatBitcoinURI(submodel->entry(sel.row()).recipient);
      GUIUtil::setClipboard(uri);
  }
  
  // context menu action: copy label
  void ReceiveCoinsDialog::copyLabel()
  {
      copyColumnToClipboard(RecentRequestsTableModel::Label);
  }
  
  // context menu action: copy message
  void ReceiveCoinsDialog::copyMessage()
  {
      copyColumnToClipboard(RecentRequestsTableModel::Message);
  }
  
  // context menu action: copy amount
  void ReceiveCoinsDialog::copyAmount()
  {
      copyColumnToClipboard(RecentRequestsTableModel::Amount);
  }
  