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#include <QtGui>

#include "droparea.h"

//! [DropArea constructor]

DropArea::DropArea(QWidget *parent)

    : QLabel(parent)

{

    setMinimumSize(200, 200);

    setFrameStyle(QFrame::Sunken | QFrame::StyledPanel);

    setAlignment(Qt::AlignCenter);

    setAcceptDrops(true);

    setAutoFillBackground(true);

    clear();

}

//! [DropArea constructor]

//! [dragEnterEvent() function]

void DropArea::dragEnterEvent(QDragEnterEvent *event)

{

    setText(tr("<drop content>"));

    setBackgroundRole(QPalette::Highlight);

    event->acceptProposedAction();

    emit changed(event->mimeData());

}

//! [dragEnterEvent() function]

//! [dragMoveEvent() function]

void DropArea::dragMoveEvent(QDragMoveEvent *event)

{

    event->acceptProposedAction();

}

//! [dragMoveEvent() function]

//! [dropEvent() function part1]

void DropArea::dropEvent(QDropEvent *event)

{

    const QMimeData *mimeData = event->mimeData();

//! [dropEvent() function part1]

//! [dropEvent() function part2]

    if (mimeData->hasImage()) {

        setPixmap(qvariant_cast<QPixmap>(mimeData->imageData()));

    } else if (mimeData->hasHtml()) {

        setText(mimeData->html());

        setTextFormat(Qt::RichText);

    } else if (mimeData->hasText()) {

        setText(mimeData->text());    

        setTextFormat(Qt::PlainText);

    } else if (mimeData->hasUrls()) {

        QList<QUrl> urlList = mimeData->urls();

        QString text;

        for (int i = 0; i < urlList.size() && i < 32; ++i) {

            QString url = urlList.at(i).path();

            text += url + QString("\n");

        }

        setText(text);

    } else {

        setText(tr("Cannot display data"));

    }

//! [dropEvent() function part2]

//! [dropEvent() function part3]    

    setBackgroundRole(QPalette::Dark);

    event->acceptProposedAction();

}

//! [dropEvent() function part3]

//! [dragLeaveEvent() function]

void DropArea::dragLeaveEvent(QDragLeaveEvent *event)

{

    clear();

    event->accept();

}

//! [dragLeaveEvent() function]

//! [clear() function]

void DropArea::clear()

{

    setText(tr("<drop content>"));

    setBackgroundRole(QPalette::Dark);

    emit changed();

}

//! [clear() function]