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Diffstat (limited to 'doc/src/snippets/porting4-dropevents/window.cpp')
-rw-r--r-- | doc/src/snippets/porting4-dropevents/window.cpp | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/doc/src/snippets/porting4-dropevents/window.cpp b/doc/src/snippets/porting4-dropevents/window.cpp new file mode 100644 index 0000000..853687a --- /dev/null +++ b/doc/src/snippets/porting4-dropevents/window.cpp @@ -0,0 +1,125 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#include "window.h" + +MyWidget::MyWidget(QWidget *parent) + : QWidget(parent) +{ + QLabel *textLabel = new QLabel(tr("Data:"), this); + dataLabel = new QLabel(this); + dataLabel->setFixedSize(200, 200); + + QVBoxLayout *layout = new QVBoxLayout(this); + layout->addWidget(textLabel); + layout->addWidget(dataLabel); + + setAcceptDrops(true); + setWindowTitle(tr("Drop Events")); +} + +//! [0] +void MyWidget::dragEnterEvent(QDragEnterEvent *event) +{ + if (event->mimeData()->hasText() || event->mimeData()->hasImage()) + event->acceptProposedAction(); +} +//! [0] + +//! [1] +void MyWidget::dropEvent(QDropEvent *event) +{ + if (event->mimeData()->hasText()) + dataLabel->setText(event->mimeData()->text()); + else if (event->mimeData()->hasImage()) { + QVariant imageData = event->mimeData()->imageData(); + dataLabel->setPixmap(qvariant_cast<QPixmap>(imageData)); + } + event->acceptProposedAction(); +} +//! [1] + +//! [2] +void MyWidget::mousePressEvent(QMouseEvent *event) +{ +//! [2] + QString text = dataLabel->text(); + QPixmap iconPixmap(32, 32); + iconPixmap.fill(qRgba(255, 0, 0, 127)); + QImage image(100, 100, QImage::Format_RGB32); + image.fill(qRgb(0, 0, 255)); + +//! [3] + if (event->button() == Qt::LeftButton) { + + QDrag *drag = new QDrag(this); + QMimeData *mimeData = new QMimeData; + + mimeData->setText(text); + mimeData->setImageData(image); + drag->setMimeData(mimeData); + drag->setPixmap(iconPixmap); + + Qt::DropAction dropAction = drag->exec(); +//! [3] + // ... +//! [4] + event->accept(); + } +//! [4] + else if (event->button() == Qt::MidButton) { + + QDrag *drag = new QDrag(this); + QMimeData *mimeData = new QMimeData; + + mimeData->setImageData(image); + drag->setMimeData(mimeData); + drag->setPixmap(iconPixmap); + + Qt::DropAction dropAction = drag->exec(); + // ... + event->accept(); + } +//! [5] +} +//! [5] |