Qt:Документация 4.3.2/draganddrop-dropsite-dropsitewindow-cpp

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[править] dropsitewindow.cpp Example File
draganddrop/dropsite/dropsitewindow.cpp

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 #include <QtGui>
 
 #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) {
                 QString url = urlList.at(i).path();
                 text.append(url + " ");
             }
         } 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);
 }

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Qt 4.3.2