1750acc392
Show the color that is dragged in, both graphically and textually. Revert to default palette for other data types. Prioritize colors over text: if an application (such as kolourpaint) offers both x-color and text, the color is probably the intention, and the text may be just a hex string for placing into a color text field. Pick-to: 6.8 6.9 Fixes: QTBUG-134313 Change-Id: I6c19f1220712881d2057bc9758bbc8cbd9247c81 Reviewed-by: Liang Qi <liang.qi@qt.io>
102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "droparea.h"
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#include <QDragEnterEvent>
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#include <QMimeData>
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using namespace Qt::StringLiterals;
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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->hasColor()) {
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const auto color = mimeData->colorData().value<QColor>();
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setText(tr("Color: %1").arg(color.name()));
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setPalette(QPalette(color));
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setBackgroundRole(QPalette::Button);
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} else if (mimeData->hasFormat(u"text/markdown"_s)) {
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setText(QString::fromUtf8(mimeData->data(u"text/markdown"_s)));
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setTextFormat(Qt::MarkdownText);
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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 (qsizetype i = 0, count = qMin(urlList.size(), qsizetype(32)); i < count; ++i)
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text += urlList.at(i).path() + u'\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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if (!mimeData->hasColor()) {
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setPalette({});
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setBackgroundRole(QPalette::Dark);
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}
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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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