[2] | 1 | /****************************************************************************
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| 2 | **
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[651] | 3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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[561] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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[2] | 6 | **
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| 7 | ** This file is part of the documentation of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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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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[561] | 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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[2] | 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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[561] | 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at [email protected].
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[2] | 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | /*
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| 43 | finalwidget.cpp
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| 44 |
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| 45 | A widget to display an image and a label containing a description.
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| 46 | */
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| 47 |
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| 48 | #include <QtGui>
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| 49 | #include "finalwidget.h"
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| 50 |
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| 51 | FinalWidget::FinalWidget(QWidget *parent, const QString &name,
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| 52 | const QSize &labelSize)
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| 53 | : QFrame(parent)
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| 54 | {
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| 55 | hasImage = false;
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| 56 | imageLabel = new QLabel;
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| 57 | imageLabel->setFrameShadow(QFrame::Sunken);
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| 58 | imageLabel->setFrameShape(QFrame::StyledPanel);
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| 59 | imageLabel->setMinimumSize(labelSize);
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| 60 | nameLabel = new QLabel(name);
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| 61 |
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| 62 | QVBoxLayout *layout = new QVBoxLayout;
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| 63 | layout->addWidget(imageLabel, 1);
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| 64 | layout->addWidget(nameLabel, 0);
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| 65 | setLayout(layout);
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| 66 | }
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| 67 |
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| 68 | /*!
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| 69 | If the mouse moves far enough when the left mouse button is held down,
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| 70 | start a drag and drop operation.
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| 71 | */
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| 72 |
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| 73 | void FinalWidget::mouseMoveEvent(QMouseEvent *event)
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| 74 | {
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| 75 | if (!(event->buttons() & Qt::LeftButton))
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| 76 | return;
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| 77 | if ((event->pos() - dragStartPosition).manhattanLength()
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| 78 | < QApplication::startDragDistance())
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| 79 | return;
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| 80 | if (!hasImage)
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| 81 | return;
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| 82 |
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| 83 | QDrag *drag = new QDrag(this);
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| 84 | QMimeData *mimeData = new QMimeData;
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| 85 |
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| 86 | //! [0]
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| 87 | QByteArray output;
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| 88 | QBuffer outputBuffer(&output);
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| 89 | outputBuffer.open(QIODevice::WriteOnly);
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| 90 | imageLabel->pixmap()->toImage().save(&outputBuffer, "PNG");
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| 91 | mimeData->setData("image/png", output);
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| 92 | //! [0]
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| 93 | /*
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| 94 | //! [1]
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| 95 | mimeData->setImageData(QVariant(*imageLabel->pixmap()));
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| 96 | //! [1]
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| 97 | */
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| 98 | drag->setMimeData(mimeData);
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| 99 | drag->setPixmap(imageLabel->pixmap()->scaled(64, 64, Qt::KeepAspectRatio));
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| 100 | //! [2]
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| 101 | drag->setHotSpot(QPoint(drag->pixmap().width()/2,
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| 102 | drag->pixmap().height()));
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| 103 | //! [2]
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| 104 |
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| 105 | drag->start();
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| 106 | }
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| 107 |
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| 108 | /*!
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| 109 | Check for left mouse button presses in order to enable drag and drop.
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| 110 | */
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| 111 |
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| 112 | void FinalWidget::mousePressEvent(QMouseEvent *event)
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| 113 | {
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| 114 | if (event->button() == Qt::LeftButton)
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| 115 | dragStartPosition = event->pos();
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| 116 | }
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| 117 |
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| 118 | const QPixmap* FinalWidget::pixmap() const
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| 119 | {
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| 120 | return imageLabel->pixmap();
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| 121 | }
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| 122 |
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| 123 | void FinalWidget::setPixmap(const QPixmap &pixmap)
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| 124 | {
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| 125 | imageLabel->setPixmap(pixmap);
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| 126 | hasImage = true;
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| 127 | }
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