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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 ** Contact: Qt Software Information (qt-info@nokia.com)
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5 **
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6 ** This file is part of the examples of the Qt Toolkit.
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7 **
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8 ** $QT_BEGIN_LICENSE:LGPL$
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9 ** Commercial Usage
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10 ** Licensees holding valid Qt Commercial licenses may use this file in
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11 ** accordance with the Qt Commercial License Agreement provided with the
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12 ** Software or, alternatively, in accordance with the terms contained in
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13 ** a written agreement between you and Nokia.
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14 **
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15 ** GNU Lesser General Public License Usage
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16 ** Alternatively, this file may be used under the terms of the GNU Lesser
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17 ** General Public License version 2.1 as published by the Free Software
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18 ** Foundation and appearing in the file LICENSE.LGPL included in the
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19 ** packaging of this file. Please review the following information to
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20 ** ensure the GNU Lesser General Public License version 2.1 requirements
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21 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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22 **
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23 ** In addition, as a special exception, Nokia gives you certain
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24 ** additional rights. These rights are described in the Nokia Qt LGPL
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25 ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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26 ** package.
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27 **
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28 ** GNU General Public License Usage
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29 ** Alternatively, this file may be used under the terms of the GNU
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30 ** General Public License version 3.0 as published by the Free Software
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31 ** Foundation and appearing in the file LICENSE.GPL included in the
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32 ** packaging of this file. Please review the following information to
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33 ** ensure the GNU General Public License version 3.0 requirements will be
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34 ** met: http://www.gnu.org/copyleft/gpl.html.
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35 **
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36 ** If you are unsure which license is appropriate for your use, please
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37 ** contact the sales department at qt-sales@nokia.com.
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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 module droparea;
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43
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44 import qt.gui.QLabel;
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45
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46 import tango.io.Stdout;
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47
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48
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49 class DropArea : public QLabel
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50 {
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51 public:
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52 this(QWidget parent = null)
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53 {
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54 super(parent);
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55
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56 setMinimumSize(200, 200);
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57 setFrameStyle(QFrame.Sunken | QFrame.StyledPanel);
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58 setAlignment(Qt.AlignCenter);
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59 setAcceptDrops(true);
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60 setAutoFillBackground(true);
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61 clearArea();
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62 }
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63
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64 void clearArea()
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65 {
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66 setText(tr("<drop content>"));
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67 setBackgroundRole(QPalette.Dark);
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68
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69 changed.emit(null);
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70 }
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71
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72 mixin Signal!("changed", QMimeData);
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73
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74 protected:
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75
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76 void dragEnterEvent(QDragEnterEvent event)
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77 {
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78 setText(tr("<drop content>"));
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79 setBackgroundRole(QPalette.Highlight);
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80
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81 event.acceptProposedAction();
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82 changed.emit(event.mimeData);
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83 }
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84
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85 void dragMoveEvent(QDragMoveEvent event)
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86 {
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87 event.acceptProposedAction();
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88 }
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89
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90 void dragLeaveEvent(QDragLeaveEvent event)
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91 {
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92 clearArea();
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93 event.accept();
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94 }
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95
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96 void dropEvent(QDropEvent event)
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97 {
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98 QMimeData mimeData = event.mimeData();
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99
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100 if (mimeData.hasImage()) {
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101 //TODO setPixmap(qvariant_cast<QPixmap>(mimeData.imageData());
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102 } else if (mimeData.hasHtml()) {
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103 setText(mimeData.html());
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104 setTextFormat(Qt.RichText);
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105 } else if (mimeData.hasText()) {
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106 setText(mimeData.text());
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107 setTextFormat(Qt.PlainText);
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108 } else if (mimeData.hasUrls()) {
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109 QUrl[] urlList = mimeData.urls();
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110 char[] text;
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111 for (int i = 0; i < urlList.length && i < 32; ++i) {
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112 text ~= urlList[i].path() ~ "\n";
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113 }
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114 setText(text);
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115 } else {
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116 setText(tr("Cannot display data"));
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117 }
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118
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119 setBackgroundRole(QPalette.Dark);
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120 event.acceptProposedAction();
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121 }
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122
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123 private:
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124 QLabel label;
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125 }
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126
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