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# dropsitewindow.cpp Example File
draganddrop/dropsite/dropsitewindow.cpp

        /****************************************************************************
        **
        ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
        ** License version 2.0 as published by the Free Software Foundation
        ** and appearing in the file LICENSE.GPL included in the packaging of
        ** this file.  Please review the following information to ensure GNU
        ** General Public Licensing requirements will be met:
        ** http://www.trolltech.com/products/qt/opensource.html
        **
        ** If you are unsure which license is appropriate for your use, please
        ** review the following information:
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        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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);
        }