mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-27 14:38:28 +08:00
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
|
|
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
|
|
|
|
#include "pieceslist.h"
|
|
|
|
#include <QDrag>
|
|
#include <QDragEnterEvent>
|
|
#include <QMimeData>
|
|
|
|
PiecesList::PiecesList(int pieceSize, QWidget *parent)
|
|
: QListWidget(parent), m_PieceSize(pieceSize)
|
|
{
|
|
setDragEnabled(true);
|
|
setViewMode(QListView::IconMode);
|
|
setIconSize(QSize(m_PieceSize, m_PieceSize));
|
|
setSpacing(10);
|
|
setAcceptDrops(true);
|
|
setDropIndicatorShown(true);
|
|
}
|
|
|
|
void PiecesList::dragEnterEvent(QDragEnterEvent *event)
|
|
{
|
|
if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType()))
|
|
event->accept();
|
|
else
|
|
event->ignore();
|
|
}
|
|
|
|
void PiecesList::dragMoveEvent(QDragMoveEvent *event)
|
|
{
|
|
if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType())) {
|
|
event->setDropAction(Qt::MoveAction);
|
|
event->accept();
|
|
} else {
|
|
event->ignore();
|
|
}
|
|
}
|
|
|
|
void PiecesList::dropEvent(QDropEvent *event)
|
|
{
|
|
if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType())) {
|
|
QByteArray pieceData = event->mimeData()->data(PiecesList::puzzleMimeType());
|
|
QDataStream dataStream(&pieceData, QIODevice::ReadOnly);
|
|
QPixmap pixmap;
|
|
QPoint location;
|
|
dataStream >> pixmap >> location;
|
|
|
|
addPiece(pixmap, location);
|
|
|
|
event->setDropAction(Qt::MoveAction);
|
|
event->accept();
|
|
} else {
|
|
event->ignore();
|
|
}
|
|
}
|
|
|
|
void PiecesList::addPiece(const QPixmap &pixmap, const QPoint &location)
|
|
{
|
|
QListWidgetItem *pieceItem = new QListWidgetItem(this);
|
|
pieceItem->setIcon(QIcon(pixmap));
|
|
pieceItem->setData(Qt::UserRole, QVariant(pixmap));
|
|
pieceItem->setData(Qt::UserRole+1, location);
|
|
pieceItem->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsDragEnabled);
|
|
}
|
|
|
|
void PiecesList::startDrag(Qt::DropActions /*supportedActions*/)
|
|
{
|
|
QListWidgetItem *item = currentItem();
|
|
|
|
QByteArray itemData;
|
|
QDataStream dataStream(&itemData, QIODevice::WriteOnly);
|
|
QPixmap pixmap = qvariant_cast<QPixmap>(item->data(Qt::UserRole));
|
|
QPoint location = item->data(Qt::UserRole+1).toPoint();
|
|
|
|
dataStream << pixmap << location;
|
|
|
|
QMimeData *mimeData = new QMimeData;
|
|
mimeData->setData(PiecesList::puzzleMimeType(), itemData);
|
|
|
|
QDrag *drag = new QDrag(this);
|
|
drag->setMimeData(mimeData);
|
|
drag->setHotSpot(QPoint(pixmap.width()/2, pixmap.height()/2));
|
|
drag->setPixmap(pixmap);
|
|
|
|
if (drag->exec(Qt::MoveAction) == Qt::MoveAction)
|
|
delete takeItem(row(item));
|
|
}
|