| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the examples of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
| ** |
| ** "Redistribution and use in source and binary forms, with or without |
| ** modification, are permitted provided that the following conditions are |
| ** met: |
| ** * Redistributions of source code must retain the above copyright |
| ** notice, this list of conditions and the following disclaimer. |
| ** * Redistributions in binary form must reproduce the above copyright |
| ** notice, this list of conditions and the following disclaimer in |
| ** the documentation and/or other materials provided with the |
| ** distribution. |
| ** * Neither the name of The Qt Company Ltd nor the names of its |
| ** contributors may be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** |
| ** |
| ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "droparea.h" |
| |
| #include <QDragEnterEvent> |
| #include <QMimeData> |
| |
| //! [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) |
| text += urlList.at(i).path() + QLatin1Char('\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] |