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104 lines
2.5 KiB
104 lines
2.5 KiB
/* |
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SPDX-FileCopyrightText: 2013 Eike Hein <hein@kde.org> |
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SPDX-License-Identifier: GPL-2.0-or-later |
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*/ |
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#include "draghelper.h" |
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#include <QApplication> |
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#include <QDrag> |
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#include <QMimeData> |
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#include <QQuickItem> |
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#include <QQuickWindow> |
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#include <QTimer> |
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DragHelper::DragHelper(QObject *parent) |
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: QObject(parent) |
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, m_dragIconSize(32) |
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, m_dragging(false) |
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{ |
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} |
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DragHelper::~DragHelper() |
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{ |
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} |
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int DragHelper::dragIconSize() const |
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{ |
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return m_dragIconSize; |
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} |
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void DragHelper::setDragIconSize(int size) |
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{ |
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if (m_dragIconSize != size) { |
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m_dragIconSize = size; |
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emit dragIconSizeChanged(); |
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} |
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} |
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bool DragHelper::isDrag(int oldX, int oldY, int newX, int newY) const |
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{ |
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return ((QPoint(oldX, oldY) - QPoint(newX, newY)).manhattanLength() >= QApplication::startDragDistance()); |
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} |
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void DragHelper::startDrag(QQuickItem *item, const QUrl &url, const QIcon &icon, const QString &extraMimeType, const QString &extraMimeData) |
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{ |
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// This allows the caller to return, making sure we don't crash if |
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// the caller is destroyed mid-drag (as can happen due to a sycoca |
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// change). |
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QMetaObject::invokeMethod(this, |
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"doDrag", |
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Qt::QueuedConnection, |
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Q_ARG(QQuickItem *, item), |
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Q_ARG(QUrl, url), |
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Q_ARG(QIcon, icon), |
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Q_ARG(QString, extraMimeType), |
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Q_ARG(QString, extraMimeData)); |
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} |
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void DragHelper::doDrag(QQuickItem *item, const QUrl &url, const QIcon &icon, const QString &extraMimeType, const QString &extraMimeData) |
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{ |
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setDragging(true); |
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if (item && item->window() && item->window()->mouseGrabberItem()) { |
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item->window()->mouseGrabberItem()->ungrabMouse(); |
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} |
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QDrag *drag = new QDrag(item); |
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QMimeData *mimeData = new QMimeData(); |
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if (!url.isEmpty()) { |
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mimeData->setUrls(QList<QUrl>() << url); |
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} |
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if (!extraMimeType.isEmpty() && !extraMimeData.isEmpty()) { |
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mimeData->setData(extraMimeType, extraMimeData.toLatin1()); |
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} |
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drag->setMimeData(mimeData); |
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if (!icon.isNull()) { |
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drag->setPixmap(icon.pixmap(m_dragIconSize, m_dragIconSize)); |
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} |
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drag->exec(); |
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emit dropped(); |
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// Ensure dragging is still true when onRelease is called. |
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QTimer::singleShot(0, qApp, [this] { |
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setDragging(false); |
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}); |
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} |
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void DragHelper::setDragging(bool dragging) |
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{ |
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if (m_dragging == dragging) |
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return; |
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m_dragging = dragging; |
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emit draggingChanged(); |
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}
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