mainwindow.cpp Example File | Qt Widgets 5.12.7

Qt 5.12 | Qt Widgets | Order Form Example | mainwindow.cpp Example File

Qt 5.12.7 Reference Documentation

# mainwindow.cpp Example File

richtext/orderform/mainwindow.cpp

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      #include <QtWidgets>
      #if defined(QT_PRINTSUPPORT_LIB)
      #include <QtPrintSupport/qtprintsupportglobal.h>
      #if QT_CONFIG(printdialog)
      #include <QPrinter>
      #include <QPrintDialog>
      #endif
      #endif

      #include "detailsdialog.h"
      #include "mainwindow.h"

      MainWindow::MainWindow()
      {
          QMenu *fileMenu = new QMenu(tr("&File"), this);
          QAction *newAction = fileMenu->addAction(tr("&New..."));
          newAction->setShortcuts(QKeySequence::New);
          printAction = fileMenu->addAction(tr("&Print..."), this, SLOT(printFile()));
          printAction->setShortcuts(QKeySequence::Print);
          printAction->setEnabled(false);
          QAction *quitAction = fileMenu->addAction(tr("E&xit"));
          quitAction->setShortcuts(QKeySequence::Quit);
          menuBar()->addMenu(fileMenu);

          letters = new QTabWidget;

          connect(newAction, &QAction::triggered, this, &MainWindow::openDialog);
          connect(quitAction, &QAction::triggered, this, &MainWindow::close);

          setCentralWidget(letters);
          setWindowTitle(tr("Order Form"));
      }

      void MainWindow::createLetter(const QString &name, const QString &address,
                                    QList<QPair<QString,int> > orderItems,
                                    bool sendOffers)
      {
          QTextEdit *editor = new QTextEdit;
          int tabIndex = letters->addTab(editor, name);
          letters->setCurrentIndex(tabIndex);

          QTextCursor cursor(editor->textCursor());
          cursor.movePosition(QTextCursor::Start);
          QTextFrame *topFrame = cursor.currentFrame();
          QTextFrameFormat topFrameFormat = topFrame->frameFormat();
          topFrameFormat.setPadding(16);
          topFrame->setFrameFormat(topFrameFormat);

          QTextCharFormat textFormat;
          QTextCharFormat boldFormat;
          boldFormat.setFontWeight(QFont::Bold);

          QTextFrameFormat referenceFrameFormat;
          referenceFrameFormat.setBorder(1);
          referenceFrameFormat.setPadding(8);
          referenceFrameFormat.setPosition(QTextFrameFormat::FloatRight);
          referenceFrameFormat.setWidth(QTextLength(QTextLength::PercentageLength, 40));
          cursor.insertFrame(referenceFrameFormat);

          cursor.insertText("A company", boldFormat);
          cursor.insertBlock();
          cursor.insertText("321 City Street");
          cursor.insertBlock();
          cursor.insertText("Industry Park");
          cursor.insertBlock();
          cursor.insertText("Another country");

          cursor.setPosition(topFrame->lastPosition());

          cursor.insertText(name, textFormat);
          QString line;
          foreach (line, address.split("\n")) {
              cursor.insertBlock();
              cursor.insertText(line);
          }
          cursor.insertBlock();
          cursor.insertBlock();

          QDate date = QDate::currentDate();
          cursor.insertText(tr("Date: %1").arg(date.toString("d MMMM yyyy")),
                            textFormat);
          cursor.insertBlock();

          QTextFrameFormat bodyFrameFormat;
          bodyFrameFormat.setWidth(QTextLength(QTextLength::PercentageLength, 100));
          cursor.insertFrame(bodyFrameFormat);

          cursor.insertText(tr("I would like to place an order for the following "
                               "items:"), textFormat);
          cursor.insertBlock();
          cursor.insertBlock();

          QTextTableFormat orderTableFormat;
          orderTableFormat.setAlignment(Qt::AlignHCenter);
          QTextTable *orderTable = cursor.insertTable(1, 2, orderTableFormat);

          QTextFrameFormat orderFrameFormat = cursor.currentFrame()->frameFormat();
          orderFrameFormat.setBorder(1);
          cursor.currentFrame()->setFrameFormat(orderFrameFormat);

          cursor = orderTable->cellAt(0, 0).firstCursorPosition();
          cursor.insertText(tr("Product"), boldFormat);
          cursor = orderTable->cellAt(0, 1).firstCursorPosition();
          cursor.insertText(tr("Quantity"), boldFormat);

          for (int i = 0; i < orderItems.count(); ++i) {
              QPair<QString,int> item = orderItems[i];
              int row = orderTable->rows();

              orderTable->insertRows(row, 1);
              cursor = orderTable->cellAt(row, 0).firstCursorPosition();
              cursor.insertText(item.first, textFormat);
              cursor = orderTable->cellAt(row, 1).firstCursorPosition();
              cursor.insertText(QString("%1").arg(item.second), textFormat);
          }

          cursor.setPosition(topFrame->lastPosition());

          cursor.insertBlock();
          cursor.insertText(tr("Please update my records to take account of the "
                               "following privacy information:"));
          cursor.insertBlock();

          QTextTable *offersTable = cursor.insertTable(2, 2);

          cursor = offersTable->cellAt(0, 1).firstCursorPosition();
          cursor.insertText(tr("I want to receive more information about your "
                               "company's products and special offers."), textFormat);
          cursor = offersTable->cellAt(1, 1).firstCursorPosition();
          cursor.insertText(tr("I do not want to receive any promotional information "
                               "from your company."), textFormat);

          if (sendOffers)
              cursor = offersTable->cellAt(0, 0).firstCursorPosition();
          else
              cursor = offersTable->cellAt(1, 0).firstCursorPosition();

          cursor.insertText("X", boldFormat);

          cursor.setPosition(topFrame->lastPosition());
          cursor.insertBlock();
          cursor.insertText(tr("Sincerely,"), textFormat);
          cursor.insertBlock();
          cursor.insertBlock();
          cursor.insertBlock();
          cursor.insertText(name);

          printAction->setEnabled(true);
      }

      void MainWindow::createSample()
      {
          DetailsDialog dialog("Dialog with default values", this);
          createLetter("Mr. Smith", "12 High Street\nSmall Town\nThis country",
                       dialog.orderItems(), true);
      }

      void MainWindow::openDialog()
      {
          DetailsDialog dialog(tr("Enter Customer Details"), this);

          if (dialog.exec() == QDialog::Accepted) {
              createLetter(dialog.senderName(), dialog.senderAddress(),
                           dialog.orderItems(), dialog.sendOffers());
          }
      }

      void MainWindow::printFile()
      {
      #if QT_CONFIG(printdialog)
          QTextEdit *editor = static_cast<QTextEdit*>(letters->currentWidget());
          QPrinter printer;

          QPrintDialog dialog(&printer, this);
          dialog.setWindowTitle(tr("Print Document"));
          if (editor->textCursor().hasSelection())
              dialog.addEnabledOption(QAbstractPrintDialog::PrintSelection);
          if (dialog.exec() != QDialog::Accepted) {
              return;
          }

          editor->print(&printer);
      #endif
      }