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120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
/*******************************************************************************
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* plugins/FeedReader/gui/FeedTreeWidget.cpp *
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* *
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* Copyright (C) 2012 RetroShare Team <retroshare.project@gmail.com> *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Affero General Public License as *
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* published by the Free Software Foundation, either version 3 of the *
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* License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Affero General Public License for more details. *
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* *
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* You should have received a copy of the GNU Affero General Public License *
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* along with this program. If not, see <https://www.gnu.org/licenses/>. *
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* *
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*******************************************************************************/
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#include <QDropEvent>
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#include "FeedTreeWidget.h"
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FeedTreeWidget::FeedTreeWidget(QWidget *parent) : RSTreeWidget(parent)
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{
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mDraggedItem = NULL;
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}
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void FeedTreeWidget::dragEnterEvent(QDragEnterEvent *event)
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{
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mDraggedItem = currentItem();
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RSTreeWidget::dragEnterEvent(event);
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}
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void FeedTreeWidget::dragLeaveEvent(QDragLeaveEvent *event)
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{
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RSTreeWidget::dragLeaveEvent(event);
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mDraggedItem = NULL;
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}
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bool FeedTreeWidget::canDrop(QDropEvent *event, QTreeWidgetItem **dropItem)
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{
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if (dropItem) {
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*dropItem = NULL;
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}
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if (!mDraggedItem) {
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/* no drag item */
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return false;
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}
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QModelIndex droppedIndex = indexAt(event->pos());
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if (!droppedIndex.isValid()) {
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/* no drop target */
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return false;
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}
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QTreeWidgetItem *dropItemIntern = itemFromIndex(droppedIndex);
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if (!dropItemIntern) {
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/* no drop item */
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return false;
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}
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if ((dropItemIntern->flags() & Qt::ItemIsDropEnabled) == 0) {
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/* drop is disabled */
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return false;
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}
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if (dropItemIntern == mDraggedItem->parent()) {
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/* drag item parent */
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return false;
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}
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if (dropItem) {
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*dropItem = dropItemIntern;
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}
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return true;
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}
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void FeedTreeWidget::dragMoveEvent(QDragMoveEvent *event)
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{
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if (!canDrop(event)) {
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event->ignore();
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return;
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}
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RSTreeWidget::dragMoveEvent(event);
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}
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void FeedTreeWidget::dropEvent(QDropEvent *event)
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{
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QTreeWidgetItem *dropItem;
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if (!canDrop(event, &dropItem)) {
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event->ignore();
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return;
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}
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if (!mDraggedItem) {
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/* no drag item */
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event->ignore();
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return;
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}
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QTreeWidgetItem *draggedParent = mDraggedItem->parent();
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if (!draggedParent) {
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/* no drag item parent */
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event->ignore();
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return;
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}
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if (!dropItem) {
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/* no drop item */
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event->ignore();
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return;
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}
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emit feedReparent(mDraggedItem, dropItem);
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}
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