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86 lines
2.1 KiB
86 lines
2.1 KiB
/* |
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SPDX-FileCopyrightText: 2022 Kai Uwe Broulik <kde@broulik.de> |
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SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL |
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*/ |
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#include "draghelper.h" |
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#include <QDrag> |
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#include <QGuiApplication> |
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#include <QMetaObject> |
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#include <QMimeData> |
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#include <QQuickWindow> |
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#include <QStyleHints> |
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DragHelper::DragHelper(QObject *parent) |
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: QObject(parent) |
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{ |
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} |
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DragHelper::~DragHelper() = default; |
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bool DragHelper::dragActive() const |
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{ |
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return m_dragActive; |
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} |
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int DragHelper::dragPixmapSize() const |
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{ |
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return m_dragPixmapSize; |
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} |
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void DragHelper::setDragPixmapSize(int dragPixmapSize) |
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{ |
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if (m_dragPixmapSize != dragPixmapSize) { |
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m_dragPixmapSize = dragPixmapSize; |
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Q_EMIT dragPixmapSizeChanged(); |
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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() >= qApp->styleHints()->startDragDistance()); |
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} |
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void DragHelper::startDrag(QQuickItem *item, const QUrl &url, const QString &iconName) |
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{ |
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startDrag(item, url, QIcon::fromTheme(iconName).pixmap(m_dragPixmapSize, m_dragPixmapSize)); |
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} |
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void DragHelper::startDrag(QQuickItem *item, const QUrl &url, const QPixmap &pixmap) |
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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 |
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QMetaObject::invokeMethod(this, "doDrag", Qt::QueuedConnection, Q_ARG(QQuickItem *, item), Q_ARG(QUrl, url), Q_ARG(QPixmap, pixmap)); |
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} |
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void DragHelper::doDrag(QQuickItem *item, const QUrl &url, const QPixmap &pixmap) |
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{ |
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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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drag->setMimeData(mimeData); |
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if (!pixmap.isNull()) { |
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drag->setPixmap(pixmap); |
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} |
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m_dragActive = true; |
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Q_EMIT dragActiveChanged(); |
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drag->exec(); |
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m_dragActive = false; |
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Q_EMIT dragActiveChanged(); |
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}
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