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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 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 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include <QtGui> |
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43 |
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44 #include "droparea.h" |
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45 |
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46 //! [DropArea constructor] |
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47 DropArea::DropArea(QWidget *parent) |
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48 : QLabel(parent) |
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49 { |
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50 setMinimumSize(200, 200); |
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51 setFrameStyle(QFrame::Sunken | QFrame::StyledPanel); |
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52 setAlignment(Qt::AlignCenter); |
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53 setAcceptDrops(true); |
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54 setAutoFillBackground(true); |
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55 clear(); |
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56 } |
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57 //! [DropArea constructor] |
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58 |
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59 //! [dragEnterEvent() function] |
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60 void DropArea::dragEnterEvent(QDragEnterEvent *event) |
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61 { |
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62 setText(tr("<drop content>")); |
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63 setBackgroundRole(QPalette::Highlight); |
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64 |
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65 event->acceptProposedAction(); |
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66 emit changed(event->mimeData()); |
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67 } |
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68 //! [dragEnterEvent() function] |
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69 |
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70 //! [dragMoveEvent() function] |
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71 void DropArea::dragMoveEvent(QDragMoveEvent *event) |
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72 { |
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73 event->acceptProposedAction(); |
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74 } |
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75 //! [dragMoveEvent() function] |
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76 |
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77 //! [dropEvent() function part1] |
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78 void DropArea::dropEvent(QDropEvent *event) |
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79 { |
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80 const QMimeData *mimeData = event->mimeData(); |
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81 //! [dropEvent() function part1] |
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82 |
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83 //! [dropEvent() function part2] |
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84 if (mimeData->hasImage()) { |
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85 setPixmap(qvariant_cast<QPixmap>(mimeData->imageData())); |
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86 } else if (mimeData->hasHtml()) { |
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87 setText(mimeData->html()); |
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88 setTextFormat(Qt::RichText); |
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89 } else if (mimeData->hasText()) { |
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90 setText(mimeData->text()); |
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91 setTextFormat(Qt::PlainText); |
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92 } else if (mimeData->hasUrls()) { |
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93 QList<QUrl> urlList = mimeData->urls(); |
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94 QString text; |
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95 for (int i = 0; i < urlList.size() && i < 32; ++i) { |
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96 QString url = urlList.at(i).path(); |
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97 text += url + QString("\n"); |
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98 } |
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99 setText(text); |
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100 } else { |
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101 setText(tr("Cannot display data")); |
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102 } |
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103 //! [dropEvent() function part2] |
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104 |
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105 //! [dropEvent() function part3] |
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106 setBackgroundRole(QPalette::Dark); |
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107 event->acceptProposedAction(); |
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108 } |
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109 //! [dropEvent() function part3] |
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110 |
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111 //! [dragLeaveEvent() function] |
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112 void DropArea::dragLeaveEvent(QDragLeaveEvent *event) |
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113 { |
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114 clear(); |
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115 event->accept(); |
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116 } |
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117 //! [dragLeaveEvent() function] |
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118 |
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119 //! [clear() function] |
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120 void DropArea::clear() |
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121 { |
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122 setText(tr("<drop content>")); |
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123 setBackgroundRole(QPalette::Dark); |
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124 |
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125 emit changed(); |
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126 } |
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127 //! [clear() function] |