| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:BSD$
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| 10 | ** You may use this file under the terms of the BSD license as follows:
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| 11 | **
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| 12 | ** "Redistribution and use in source and binary forms, with or without
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| 13 | ** modification, are permitted provided that the following conditions are
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| 14 | ** met:
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| 15 | ** * Redistributions of source code must retain the above copyright
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| 16 | ** notice, this list of conditions and the following disclaimer.
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| 17 | ** * Redistributions in binary form must reproduce the above copyright
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| 18 | ** notice, this list of conditions and the following disclaimer in
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| 19 | ** the documentation and/or other materials provided with the
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| 20 | ** distribution.
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| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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| 22 | ** the names of its contributors may be used to endorse or promote
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| 23 | ** products derived from this software without specific prior written
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| 24 | ** permission.
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| 25 | **
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| 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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| 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ****************************************************************************/
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| 40 |
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| 41 | #include <QtGui>
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| 42 |
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| 43 | #include "droparea.h"
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| 44 |
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| 45 | //! [DropArea constructor]
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| 46 | DropArea::DropArea(QWidget *parent)
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| 47 | : QLabel(parent)
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| 48 | {
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| 49 | setMinimumSize(200, 200);
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| 50 | setFrameStyle(QFrame::Sunken | QFrame::StyledPanel);
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| 51 | setAlignment(Qt::AlignCenter);
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| 52 | setAcceptDrops(true);
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| 53 | setAutoFillBackground(true);
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| 54 | clear();
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| 55 | }
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| 56 | //! [DropArea constructor]
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| 57 |
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| 58 | //! [dragEnterEvent() function]
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| 59 | void DropArea::dragEnterEvent(QDragEnterEvent *event)
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| 60 | {
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| 61 | setText(tr("<drop content>"));
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| 62 | setBackgroundRole(QPalette::Highlight);
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| 63 |
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| 64 | event->acceptProposedAction();
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| 65 | emit changed(event->mimeData());
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| 66 | }
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| 67 | //! [dragEnterEvent() function]
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| 68 |
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| 69 | //! [dragMoveEvent() function]
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| 70 | void DropArea::dragMoveEvent(QDragMoveEvent *event)
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| 71 | {
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| 72 | event->acceptProposedAction();
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| 73 | }
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| 74 | //! [dragMoveEvent() function]
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| 75 |
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| 76 | //! [dropEvent() function part1]
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| 77 | void DropArea::dropEvent(QDropEvent *event)
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| 78 | {
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| 79 | const QMimeData *mimeData = event->mimeData();
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| 80 | //! [dropEvent() function part1]
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| 81 |
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| 82 | //! [dropEvent() function part2]
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| 83 | if (mimeData->hasImage()) {
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| 84 | setPixmap(qvariant_cast<QPixmap>(mimeData->imageData()));
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| 85 | } else if (mimeData->hasHtml()) {
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| 86 | setText(mimeData->html());
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| 87 | setTextFormat(Qt::RichText);
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| 88 | } else if (mimeData->hasText()) {
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| 89 | setText(mimeData->text());
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| 90 | setTextFormat(Qt::PlainText);
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| 91 | } else if (mimeData->hasUrls()) {
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| 92 | QList<QUrl> urlList = mimeData->urls();
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| 93 | QString text;
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| 94 | for (int i = 0; i < urlList.size() && i < 32; ++i) {
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| 95 | QString url = urlList.at(i).path();
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| 96 | text += url + QString("\n");
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| 97 | }
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| 98 | setText(text);
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| 99 | } else {
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| 100 | setText(tr("Cannot display data"));
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| 101 | }
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| 102 | //! [dropEvent() function part2]
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| 103 |
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| 104 | //! [dropEvent() function part3]
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| 105 | setBackgroundRole(QPalette::Dark);
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| 106 | event->acceptProposedAction();
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| 107 | }
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| 108 | //! [dropEvent() function part3]
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| 109 |
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| 110 | //! [dragLeaveEvent() function]
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| 111 | void DropArea::dragLeaveEvent(QDragLeaveEvent *event)
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| 112 | {
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| 113 | clear();
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| 114 | event->accept();
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| 115 | }
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| 116 | //! [dragLeaveEvent() function]
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| 117 |
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| 118 | //! [clear() function]
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| 119 | void DropArea::clear()
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| 120 | {
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| 121 | setText(tr("<drop content>"));
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| 122 | setBackgroundRole(QPalette::Dark);
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| 123 |
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| 124 | emit changed();
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| 125 | }
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| 126 | //! [clear() function]
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