dropsitewindow.cpp Example File
^{draganddrop/dropsite/dropsitewindow.cpp}

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    ** This file is part of the documentation of the Qt Toolkit.
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    #include <QtGui>

    #include "dropsitewindow.h"

    DropSiteWindow::DropSiteWindow(QWidget *parent)
        : QWidget(parent)
    {
        abstractLabel = new QLabel(tr("The Drop Site example accepts drops from other "
                                      "applications, and displays the MIME formats "
                                      "provided by the drag object."));
        abstractLabel->setWordWrap(true);
        abstractLabel->adjustSize();

        dropSiteWidget = new DropSiteWidget;
        connect(dropSiteWidget, SIGNAL(changed(const QMimeData*)),
                this, SLOT(updateSupportedFormats(const QMimeData*)));

        supportedFormats = new QTableWidget(0, 2);
        QStringList labels;
        labels << tr("Format") << tr("Content");
        supportedFormats->setHorizontalHeaderLabels(labels);
        supportedFormats->horizontalHeader()->setStretchLastSection(true);

        quitButton = new QPushButton(tr("Quit"));
        connect(quitButton, SIGNAL(pressed()), this, SLOT(close()));

        clearButton = new QPushButton(tr("Clear"));
        connect(clearButton, SIGNAL(pressed()), dropSiteWidget, SLOT(clear()));

        QHBoxLayout *buttonLayout = new QHBoxLayout;
        buttonLayout->addStretch();
        buttonLayout->addWidget(clearButton);
        buttonLayout->addWidget(quitButton);
        buttonLayout->addStretch();

        layout = new QVBoxLayout;
        layout->addWidget(abstractLabel);
        layout->addWidget(dropSiteWidget);
        layout->addWidget(supportedFormats);
        layout->addLayout(buttonLayout);

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

    void DropSiteWindow::resizeEvent(QResizeEvent *event)
    {
        supportedFormats->resizeColumnToContents(0);
        QWidget::resizeEvent(event);
    }

    void DropSiteWindow::updateSupportedFormats(const QMimeData *mimeData)
    {
        supportedFormats->setRowCount(0);

        if (!mimeData)
            return;

        QStringList formats = mimeData->formats();

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

            QByteArray data = mimeData->data(format);
            QTableWidgetItem *dataItem;

            QString text = dropSiteWidget->createPlainText(data, format);
            qApp->processEvents();
            if (!text.isEmpty()) {
                dataItem = new QTableWidgetItem(text);
            } else {
                QString hexdata = "";
                foreach (uint byte, data) {
                    if (hexdata.length() < 128) {
                        QString hex = QString("%1").arg(byte, 2, 16, QLatin1Char('0')).toUpper();
                        hexdata.append(hex + " ");
                    }
                }
                dataItem = new QTableWidgetItem(hexdata);
            }
            dataItem->setFlags(Qt::ItemIsEnabled);

            int row = supportedFormats->rowCount();
            supportedFormats->insertRow(row);
            supportedFormats->setItem(row, 0, formatItem);
            supportedFormats->setItem(row, 1, dataItem);
        }

        supportedFormats->resizeColumnToContents(0);
    }