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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "droparea.h"
#include <QDragEnterEvent>
#include <QMimeData>
using namespace Qt::StringLiterals;
//! [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->hasFormat(u"text/markdown"_s)) {
setText(QString::fromUtf8(mimeData->data(u"text/markdown"_s)));
setTextFormat(Qt::MarkdownText);
} 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 (qsizetype i = 0, count = qMin(urlList.size(), qsizetype(32)); i < count; ++i)
text += urlList.at(i).path() + u'\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]
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