dropsitewindow.cpp Example File

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  #include <QtWidgets>

  #include "droparea.h"
  #include "dropsitewindow.h"

  DropSiteWindow::DropSiteWindow()
  {
      abstractLabel = new QLabel(tr("This example accepts drags from other "
                                    "applications and displays the MIME types "
                                    "provided by the drag object."));
      abstractLabel->setWordWrap(true);
      abstractLabel->adjustSize();

      dropArea = new DropArea;
      connect(dropArea, &DropArea::changed,
              this, &DropSiteWindow::updateFormatsTable);

      QStringList labels;
      labels << tr("Format") << tr("Content");

      formatsTable = new QTableWidget;
      formatsTable->setColumnCount(2);
      formatsTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
      formatsTable->setHorizontalHeaderLabels(labels);
      formatsTable->horizontalHeader()->setStretchLastSection(true);

      clearButton = new QPushButton(tr("Clear"));
      quitButton = new QPushButton(tr("Quit"));

      buttonBox = new QDialogButtonBox;
      buttonBox->addButton(clearButton, QDialogButtonBox::ActionRole);
      buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);

      connect(quitButton, &QAbstractButton::pressed, this, &QWidget::close);
      connect(clearButton, &QAbstractButton::pressed, dropArea, &DropArea::clear);

      QVBoxLayout *mainLayout = new QVBoxLayout(this);
      mainLayout->addWidget(abstractLabel);
      mainLayout->addWidget(dropArea);
      mainLayout->addWidget(formatsTable);
      mainLayout->addWidget(buttonBox);

      setWindowTitle(tr("Drop Site"));
      setMinimumSize(350, 500);
  }

  void DropSiteWindow::updateFormatsTable(const QMimeData *mimeData)
  {
      formatsTable->setRowCount(0);
      if (!mimeData)
          return;

      foreach (QString format, mimeData->formats()) {
          QTableWidgetItem *formatItem = new QTableWidgetItem(format);
          formatItem->setFlags(Qt::ItemIsEnabled);
          formatItem->setTextAlignment(Qt::AlignTop | Qt::AlignLeft);

          QString text;
          if (format == QLatin1String("text/plain")) {
              text = mimeData->text().simplified();
          } else if (format == QLatin1String("text/html")) {
              text = mimeData->html().simplified();
          } else if (format == QLatin1String("text/uri-list")) {
              QList<QUrl> urlList = mimeData->urls();
              for (int i = 0; i < urlList.size() && i < 32; ++i)
                  text.append(urlList.at(i).toString() + QLatin1Char(' '));
          } else {
              QByteArray data = mimeData->data(format);
              for (int i = 0; i < data.size() && i < 32; ++i)
                  text.append(QStringLiteral("%1 ").arg(uchar(data[i]), 2, 16, QLatin1Char('0')).toUpper());
          }

          int row = formatsTable->rowCount();
          formatsTable->insertRow(row);
          formatsTable->setItem(row, 0, new QTableWidgetItem(format));
          formatsTable->setItem(row, 1, new QTableWidgetItem(text));
      }

      formatsTable->resizeColumnToContents(0);
  }