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, SIGNAL(changed(const QMimeData*)),
             this, SLOT(updateFormatsTable(const QMimeData*)));

     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, SIGNAL(pressed()), this, SLOT(close()));
     connect(clearButton, SIGNAL(pressed()), dropArea, SLOT(clear()));

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

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

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

     formatsTable->resizeColumnToContents(0);
 }