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/*
SPDX-FileCopyrightText: 2022 Kai Uwe Broulik <kde@broulik.de>
SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
*/
#include "draghelper.h"
#include <QDrag>
#include <QGuiApplication>
#include <QMetaObject>
#include <QMimeData>
#include <QQuickWindow>
#include <QStyleHints>
DragHelper::DragHelper(QObject *parent)
: QObject(parent)
{
}
DragHelper::~DragHelper() = default;
bool DragHelper::dragActive() const
{
return m_dragActive;
}
int DragHelper::dragPixmapSize() const
{
return m_dragPixmapSize;
}
void DragHelper::setDragPixmapSize(int dragPixmapSize)
{
if (m_dragPixmapSize != dragPixmapSize) {
m_dragPixmapSize = dragPixmapSize;
Q_EMIT dragPixmapSizeChanged();
}
}
bool DragHelper::isDrag(int oldX, int oldY, int newX, int newY) const
{
return ((QPoint(oldX, oldY) - QPoint(newX, newY)).manhattanLength() >= qApp->styleHints()->startDragDistance());
}
void DragHelper::startDrag(QQuickItem *item, const QUrl &url, const QString &iconName)
{
startDrag(item, url, QIcon::fromTheme(iconName).pixmap(m_dragPixmapSize, m_dragPixmapSize));
}
void DragHelper::startDrag(QQuickItem *item, const QUrl &url, const QPixmap &pixmap)
{
// This allows the caller to return, making sure we don't crash if
// the caller is destroyed mid-drag
QMetaObject::invokeMethod(this, "doDrag", Qt::QueuedConnection, Q_ARG(QQuickItem *, item), Q_ARG(QUrl, url), Q_ARG(QPixmap, pixmap));
}
void DragHelper::doDrag(QQuickItem *item, const QUrl &url, const QPixmap &pixmap)
{
if (item && item->window() && item->window()->mouseGrabberItem()) {
item->window()->mouseGrabberItem()->ungrabMouse();
}
QDrag *drag = new QDrag(item);
QMimeData *mimeData = new QMimeData();
if (!url.isEmpty()) {
mimeData->setUrls(QList<QUrl>() << url);
}
drag->setMimeData(mimeData);
if (!pixmap.isNull()) {
drag->setPixmap(pixmap);
}
m_dragActive = true;
Q_EMIT dragActiveChanged();
drag->exec();
m_dragActive = false;
Q_EMIT dragActiveChanged();
}
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