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Diffstat (limited to 'examples/draganddrop/dropsite/droparea.cpp')
-rw-r--r-- | examples/draganddrop/dropsite/droparea.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/examples/draganddrop/dropsite/droparea.cpp b/examples/draganddrop/dropsite/droparea.cpp new file mode 100644 index 0000000000..2a83de888e --- /dev/null +++ b/examples/draganddrop/dropsite/droparea.cpp @@ -0,0 +1,126 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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 Nokia Corporation and its Subsidiary(-ies) 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 <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] |