126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2012 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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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 General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "listview.h"
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#include "config.h"
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#include <QtCore/QMimeData>
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#include <QtGui/QDrag>
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#include <QtGui/QIcon>
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#include <QtGui/QMouseEvent>
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ListView::ListView(QWidget *parent)
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: QListView(parent)
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{
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setDragEnabled(true);
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setContextMenuPolicy(Qt::NoContextMenu);
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setDragDropMode(QAbstractItemView::DragOnly);
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setSelectionMode(QAbstractItemView::ExtendedSelection);
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setAlternatingRowColors(true);
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setUniformItemSizes(true);
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setAttribute(Qt::WA_MouseTracking);
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}
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ListView::~ListView()
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{
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}
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void ListView::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
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{
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QListView::selectionChanged(selected, deselected);
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bool haveSelection=selectedIndexes().count();
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setContextMenuPolicy(haveSelection ? Qt::ActionsContextMenu : Qt::NoContextMenu);
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emit itemsSelected(haveSelection);
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}
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bool ListView::haveSelectedItems() const
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{
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return selectedIndexes().count()>0;
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}
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bool ListView::haveUnSelectedItems() const
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{
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return selectedIndexes().count()!=model()->rowCount();
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}
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void ListView::startDrag(Qt::DropActions supportedActions)
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{
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if (QListView::IconMode!=viewMode()) {
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QListView::startDrag(supportedActions);
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return;
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}
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QModelIndexList indexes = selectedIndexes();
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if (indexes.count() > 0) {
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QMimeData *data = model()->mimeData(indexes);
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if (!data)
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return;
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QRect rect;
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QDrag *drag = new QDrag(this);
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drag->setMimeData(data);
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if (indexes.count()>1) {
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drag->setPixmap(QIcon::fromTheme(DEFAULT_ALBUM_ICON).pixmap(64, 64));
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} else {
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drag->setPixmap(QPixmap::fromImage(model()->data(indexes.first(), Qt::DecorationRole).value<QImage>()
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.scaled(QSize(64, 64), Qt::KeepAspectRatio, Qt::SmoothTransformation)));
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}
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drag->start(supportedActions);
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}
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}
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void ListView::mouseReleaseEvent(QMouseEvent *event)
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{
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if (Qt::NoModifier==event->modifiers()) {
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QListView::mouseReleaseEvent(event);
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}
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}
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QModelIndexList ListView::selectedIndexes() const
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{
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QModelIndexList indexes=selectionModel()->selectedIndexes();
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qSort(indexes);
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return indexes;
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}
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void ListView::setModel(QAbstractItemModel *m)
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{
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QAbstractItemModel *old=model();
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QListView::setModel(m);
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if (old) {
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disconnect(old, SIGNAL(layoutChanged()), this, SLOT(correctSelection()));
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}
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if (m && old!=m) {
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connect(m, SIGNAL(layoutChanged()), this, SLOT(correctSelection()));
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}
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}
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// Workaround for https://bugreports.qt-project.org/browse/QTBUG-18009
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void ListView::correctSelection()
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{
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QItemSelection s = selectionModel()->selection();
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setCurrentIndex(currentIndex());
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selectionModel()->select(s, QItemSelectionModel::SelectCurrent);
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}
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