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Diffstat (limited to 'src/gui/doc/snippets/separations')
-rw-r--r-- | src/gui/doc/snippets/separations/finalwidget.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/gui/doc/snippets/separations/finalwidget.cpp b/src/gui/doc/snippets/separations/finalwidget.cpp new file mode 100644 index 0000000000..81a4aa1c42 --- /dev/null +++ b/src/gui/doc/snippets/separations/finalwidget.cpp @@ -0,0 +1,126 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/* +finalwidget.cpp + +A widget to display an image and a label containing a description. +*/ + +#include <QtGui> +#include "finalwidget.h" + +FinalWidget::FinalWidget(QWidget *parent, const QString &name, + const QSize &labelSize) + : QFrame(parent) +{ + hasImage = false; + imageLabel = new QLabel; + imageLabel->setFrameShadow(QFrame::Sunken); + imageLabel->setFrameShape(QFrame::StyledPanel); + imageLabel->setMinimumSize(labelSize); + nameLabel = new QLabel(name); + + QVBoxLayout *layout = new QVBoxLayout; + layout->addWidget(imageLabel, 1); + layout->addWidget(nameLabel, 0); + setLayout(layout); +} + +/*! + If the mouse moves far enough when the left mouse button is held down, + start a drag and drop operation. +*/ + +void FinalWidget::mouseMoveEvent(QMouseEvent *event) +{ + if (!(event->buttons() & Qt::LeftButton)) + return; + if ((event->pos() - dragStartPosition).manhattanLength() + < QApplication::startDragDistance()) + return; + if (!hasImage) + return; + + QDrag *drag = new QDrag(this); + QMimeData *mimeData = new QMimeData; + +//! [0] + QByteArray output; + QBuffer outputBuffer(&output); + outputBuffer.open(QIODevice::WriteOnly); + imageLabel->pixmap()->toImage().save(&outputBuffer, "PNG"); + mimeData->setData("image/png", output); +//! [0] +/* +//! [1] + mimeData->setImageData(QVariant(*imageLabel->pixmap())); +//! [1] +*/ + drag->setMimeData(mimeData); + drag->setPixmap(imageLabel->pixmap()->scaled(64, 64, Qt::KeepAspectRatio)); +//! [2] + drag->setHotSpot(QPoint(drag->pixmap().width()/2, + drag->pixmap().height())); +//! [2] + + drag->start(); +} + +/*! + Check for left mouse button presses in order to enable drag and drop. +*/ + +void FinalWidget::mousePressEvent(QMouseEvent *event) +{ + if (event->button() == Qt::LeftButton) + dragStartPosition = event->pos(); +} + +const QPixmap* FinalWidget::pixmap() const +{ + return imageLabel->pixmap(); +} + +void FinalWidget::setPixmap(const QPixmap &pixmap) +{ + imageLabel->setPixmap(pixmap); + hasImage = true; +} |