c8cd9f1b9a
- Remove class DragLabel in draggabletext and add a static creation function instead since it only has a constructor setting some properties. - Use QRegularExpression instead of QRegExp - Use new connection syntax. - Ensure compilation with DEFINES += QT_NO_CAST_TO_ASCII QT_NO_CAST_FROM_ASCII demonstrating use of QLatin1String vs QStringLiteral. - Streamline code. Change-Id: I2e2ddeb40837dba379990836c77fb72ad7263e2d Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>
126 lines
4.0 KiB
C++
126 lines
4.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "droparea.h"
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#include <QDragEnterEvent>
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#include <QMimeData>
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//! [DropArea constructor]
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DropArea::DropArea(QWidget *parent)
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: QLabel(parent)
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{
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setMinimumSize(200, 200);
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setFrameStyle(QFrame::Sunken | QFrame::StyledPanel);
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setAlignment(Qt::AlignCenter);
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setAcceptDrops(true);
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setAutoFillBackground(true);
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clear();
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}
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//! [DropArea constructor]
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//! [dragEnterEvent() function]
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void DropArea::dragEnterEvent(QDragEnterEvent *event)
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{
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setText(tr("<drop content>"));
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setBackgroundRole(QPalette::Highlight);
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event->acceptProposedAction();
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emit changed(event->mimeData());
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}
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//! [dragEnterEvent() function]
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//! [dragMoveEvent() function]
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void DropArea::dragMoveEvent(QDragMoveEvent *event)
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{
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event->acceptProposedAction();
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}
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//! [dragMoveEvent() function]
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//! [dropEvent() function part1]
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void DropArea::dropEvent(QDropEvent *event)
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{
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const QMimeData *mimeData = event->mimeData();
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//! [dropEvent() function part1]
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//! [dropEvent() function part2]
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if (mimeData->hasImage()) {
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setPixmap(qvariant_cast<QPixmap>(mimeData->imageData()));
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} else if (mimeData->hasHtml()) {
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setText(mimeData->html());
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setTextFormat(Qt::RichText);
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} else if (mimeData->hasText()) {
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setText(mimeData->text());
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setTextFormat(Qt::PlainText);
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} else if (mimeData->hasUrls()) {
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QList<QUrl> urlList = mimeData->urls();
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QString text;
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for (int i = 0; i < urlList.size() && i < 32; ++i)
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text += urlList.at(i).path() + QLatin1Char('\n');
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setText(text);
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} else {
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setText(tr("Cannot display data"));
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}
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//! [dropEvent() function part2]
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//! [dropEvent() function part3]
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setBackgroundRole(QPalette::Dark);
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event->acceptProposedAction();
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}
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//! [dropEvent() function part3]
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//! [dragLeaveEvent() function]
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void DropArea::dragLeaveEvent(QDragLeaveEvent *event)
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{
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clear();
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event->accept();
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}
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//! [dragLeaveEvent() function]
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//! [clear() function]
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void DropArea::clear()
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{
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setText(tr("<drop content>"));
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setBackgroundRole(QPalette::Dark);
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emit changed();
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}
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//! [clear() function]
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