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     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the documentation of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

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    31 **

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    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "window.h"

    45 

    46 MyWidget::MyWidget(QWidget *parent)

    47     : QWidget(parent)

    48 {

    49     QLabel *textLabel = new QLabel(tr("Data:"), this);

    50     dataLabel = new QLabel(this);

    51     dataLabel->setFixedSize(200, 200);

    52 

    53     QVBoxLayout *layout = new QVBoxLayout(this);

    54     layout->addWidget(textLabel);

    55     layout->addWidget(dataLabel);

    56 

    57     setAcceptDrops(true);

    58     setWindowTitle(tr("Drop Events"));

    59 }

    60 

    61 //! [0]

    62 void MyWidget::dragEnterEvent(QDragEnterEvent *event)

    63 {

    64     if (event->mimeData()->hasText() || event->mimeData()->hasImage())

    65         event->acceptProposedAction();

    66 }

    67 //! [0]

    68 

    69 //! [1]

    70 void MyWidget::dropEvent(QDropEvent *event)

    71 {

    72     if (event->mimeData()->hasText())

    73         dataLabel->setText(event->mimeData()->text());

    74     else if (event->mimeData()->hasImage()) {

    75         QVariant imageData = event->mimeData()->imageData();

    76         dataLabel->setPixmap(qvariant_cast<QPixmap>(imageData));

    77     }

    78     event->acceptProposedAction();

    79 }

    80 //! [1]

    81 

    82 //! [2]

    83 void MyWidget::mousePressEvent(QMouseEvent *event)

    84 {

    85 //! [2]

    86     QString text = dataLabel->text();

    87     QPixmap iconPixmap(32, 32);

    88     iconPixmap.fill(qRgba(255, 0, 0, 127));

    89     QImage image(100, 100, QImage::Format_RGB32);

    90     image.fill(qRgb(0, 0, 255));

    91 

    92 //! [3]

    93     if (event->button() == Qt::LeftButton) {

    94 

    95         QDrag *drag = new QDrag(this);

    96         QMimeData *mimeData = new QMimeData;

    97 

    98         mimeData->setText(text);

    99         mimeData->setImageData(image);

   100         drag->setMimeData(mimeData);

   101         drag->setPixmap(iconPixmap);

   102 

   103         Qt::DropAction dropAction = drag->exec();

   104 //! [3]

   105         // ...

   106 //! [4]

   107         event->accept();

   108     }

   109 //! [4]

   110     else if (event->button() == Qt::MidButton) {

   111 

   112         QDrag *drag = new QDrag(this);

   113         QMimeData *mimeData = new QMimeData;

   114 

   115         mimeData->setImageData(image);

   116         drag->setMimeData(mimeData);

   117         drag->setPixmap(iconPixmap);

   118 

   119         Qt::DropAction dropAction = drag->exec();

   120         // ...

   121         event->accept();

   122     }

   123 //! [5]

   124 }

   125 //! [5]