Qt 4.2: dropsitewindow.cpp Example File (draganddrop/dropsite/dropsitewindow.cpp)

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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 example classes 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:
     ** http://www.trolltech.com/products/qt/licensing.html or contact the
     ** sales department at sales@trolltech.com.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #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 {
                 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);
     }