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projectlistview.cpp

/***************************************************************************
 *   Copyright (C) 2007 by Jean-Baptiste Mardelle (jb@kdenlive.org)        *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/


#include "projectlistview.h"
#include "projectitem.h"
#include "subprojectitem.h"
#include "folderprojectitem.h"
#include "kdenlivesettings.h"

#include <KDebug>
#include <KMenu>
#include <KLocale>

#include <QApplication>
#include <QHeaderView>
#include <QAction>

ProjectListView::ProjectListView(QWidget *parent) :
        QTreeWidget(parent),
        m_dragStarted(false)
{
    setSelectionMode(QAbstractItemView::ExtendedSelection);
    setDragDropMode(QAbstractItemView::DragDrop);
    setDropIndicatorShown(true);
    setAlternatingRowColors(true);
    setDragEnabled(true);
    setAcceptDrops(true);


    setColumnCount(3);
    QStringList headers;
    headers << i18n("Clip") << i18n("Description") << i18n("Rating");
    setHeaderLabels(headers);

    QHeaderView* headerView = header();
    headerView->setContextMenuPolicy(Qt::CustomContextMenu);
    connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
            this, SLOT(configureColumns(const QPoint&)));
    headerView->setClickable(true);
    headerView->setSortIndicatorShown(true);
    headerView->setMovable(false);
    sortByColumn(0, Qt::AscendingOrder);
    setSortingEnabled(true);

    if (!KdenliveSettings::showdescriptioncolumn()) hideColumn(1);
    if (!KdenliveSettings::showratingcolumn()) hideColumn(2);
}

ProjectListView::~ProjectListView()
{
}

void ProjectListView::configureColumns(const QPoint& pos)
{
    KMenu popup(this);
    popup.addTitle(i18nc("@title:menu", "Columns"));

    QHeaderView* headerView = header();
    for (int i = 1; i < headerView->count(); ++i) {
        const QString text = model()->headerData(i, Qt::Horizontal).toString();
        QAction* action = popup.addAction(text);
        action->setCheckable(true);
        action->setChecked(!headerView->isSectionHidden(i));
        action->setData(i);
    }

    QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
    if (activatedAction != 0) {
        const bool show = activatedAction->isChecked();

        // remember the changed column visibility in the settings
        const int columnIndex = activatedAction->data().toInt();
        switch (columnIndex) {
        case 1:
            KdenliveSettings::setShowdescriptioncolumn(show);
            break;
        case 2:
            KdenliveSettings::setShowratingcolumn(show);
            break;
        default:
            break;
        }

        // apply the changed column visibility
        if (show) {
            showColumn(columnIndex);
        } else {
            hideColumn(columnIndex);
        }
    }
}

// virtual
void ProjectListView::contextMenuEvent(QContextMenuEvent * event)
{
    emit requestMenu(event->globalPos(), itemAt(event->pos()));
}

// virtual
void ProjectListView::mouseDoubleClickEvent(QMouseEvent * event)
{
    QTreeWidgetItem *it = itemAt(event->pos());
    if (!it) {
        emit addClip();
        return;
    }
    ProjectItem *item;
    if (it->type() == PROJECTFOLDERTYPE) {
        if ((columnAt(event->pos().x()) == 0)) QTreeWidget::mouseDoubleClickEvent(event);
        return;
    }
    if (it->type() == PROJECTSUBCLIPTYPE) {
        // subitem
        if ((columnAt(event->pos().x()) == 1)) {
            QTreeWidget::mouseDoubleClickEvent(event);
            return;
        }
        item = static_cast <ProjectItem *>(it->parent());
    } else item = static_cast <ProjectItem *>(it);

    if (!(item->flags() & Qt::ItemIsDragEnabled)) return;

    int column = columnAt(event->pos().x());
    if (column == 0 && (item->clipType() == SLIDESHOW || item->clipType() == TEXT || item->clipType() == COLOR)) {
        QPixmap pix = qVariantValue<QPixmap>(it->data(0, Qt::DecorationRole));
        int offset = pix.width() + indentation();
        if (item->parent()) offset += indentation();
        if ((pix.isNull() || offset < event->pos().x())) {
            QTreeWidget::mouseDoubleClickEvent(event);
            return;
        }
    }
    if ((column == 1) && it->type() != PROJECTSUBCLIPTYPE) {
        QTreeWidget::mouseDoubleClickEvent(event);
        return;
    }
    emit showProperties(item->referencedClip());
}

// virtual
void ProjectListView::dragEnterEvent(QDragEnterEvent *event)
{
    if (event->mimeData()->hasUrls() || event->mimeData()->hasText()) {
        kDebug() << "////////////////  DRAG ENTR OK";
    }
    event->acceptProposedAction();
}

// virtual
void ProjectListView::dropEvent(QDropEvent *event)
{
    FolderProjectItem *item = NULL;
    QTreeWidgetItem *it = itemAt(event->pos());
    while (it && it->type() != PROJECTFOLDERTYPE) {
        it = it->parent();
    }
    if (it) item = static_cast <FolderProjectItem *>(it);
    if (event->mimeData()->hasUrls()) {
        QString groupName;
        QString groupId;
        if (item) {
            groupName = item->groupName();
            groupId = item->clipId();
        }
        emit addClip(event->mimeData()->urls(), groupName, groupId);
        event->setDropAction(Qt::CopyAction);
        event->accept();
        return;
    } else if (event->mimeData()->hasFormat("kdenlive/producerslist")) {
        if (item) {
            //emit addClip(event->mimeData->text());
            const QList <QTreeWidgetItem *> list = selectedItems();
            ProjectItem *clone;
            QString parentId = item->clipId();
            foreach(QTreeWidgetItem *it, list) {
                // TODO allow dragging of folders ?
                if (it->type() == PROJECTCLIPTYPE) {
                    if (it->parent()) clone = (ProjectItem*) it->parent()->takeChild(it->parent()->indexOfChild(it));
                    else clone = (ProjectItem*) takeTopLevelItem(indexOfTopLevelItem(it));
                    if (clone) {
                        item->addChild(clone);
                        QMap <QString, QString> props;
                        props.insert("groupname", item->groupName());
                        props.insert("groupid", parentId);
                        clone->setProperties(props);
                    }
                } else item = NULL;
            }
        } else {
            // item dropped in empty zone, move it to top level
            const QList <QTreeWidgetItem *> list = selectedItems();
            ProjectItem *clone;
            foreach(QTreeWidgetItem *it, list) {
                QTreeWidgetItem *parent = it->parent();
                if (parent/* && ((ProjectItem *) it)->clipId() < 10000*/)  {
                    kDebug() << "++ item parent: " << parent->text(1);
                    clone = static_cast <ProjectItem*>(parent->takeChild(parent->indexOfChild(it)));
                    if (clone) {
                        addTopLevelItem(clone);
                        clone->clearProperty("groupname");
                        clone->clearProperty("groupid");
                    }
                }
            }
        }
        emit projectModified();
    } else if (event->mimeData()->hasFormat("kdenlive/clip")) {
        QStringList list = QString(event->mimeData()->data("kdenlive/clip")).split(';');
        emit addClipCut(list.at(0), list.at(1).toInt(), list.at(2).toInt());
    }
    event->acceptProposedAction();
}

// virtual
void ProjectListView::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton) {
        m_DragStartPosition = event->pos();
        m_dragStarted = true;
        /*QTreeWidgetItem *underMouse = itemAt(event->pos());
        if (underMouse && underMouse->isSelected()) emit focusMonitor();*/
    }
    QTreeWidget::mousePressEvent(event);
}

// virtual
void ProjectListView::mouseReleaseEvent(QMouseEvent *event)
{
    QTreeWidget::mouseReleaseEvent(event);
    QTreeWidgetItem *underMouse = itemAt(event->pos());
    if (underMouse) emit focusMonitor();
}

// virtual
void ProjectListView::mouseMoveEvent(QMouseEvent *event)
{
    //kDebug() << "// DRAG STARTED, MOUSE MOVED: ";
    if (!m_dragStarted) return;

    if ((event->pos() - m_DragStartPosition).manhattanLength()
            < QApplication::startDragDistance())
        return;

    QTreeWidgetItem *it = itemAt(m_DragStartPosition);
    if (!it) return;
    if (it->type() == PROJECTSUBCLIPTYPE) {
        // subitem
        SubProjectItem *clickItem = static_cast <SubProjectItem *>(it);
        if (clickItem && (clickItem->flags() & Qt::ItemIsDragEnabled)) {
            ProjectItem *clip = static_cast <ProjectItem *>(it->parent());
            QDrag *drag = new QDrag(this);
            QMimeData *mimeData = new QMimeData;

            QStringList list;
            list.append(clip->clipId());
            QPoint p = clickItem->zone();
            list.append(QString::number(p.x()));
            list.append(QString::number(p.y()));
            QByteArray data;
            data.append(list.join(";").toUtf8());
            mimeData->setData("kdenlive/clip", data);
            drag->setMimeData(mimeData);
            drag->setPixmap(clickItem->data(0, Qt::DecorationRole).value<QPixmap>());
            drag->setHotSpot(QPoint(0, 50));
            drag->exec();
        }
    } else {
        if (it && (it->flags() & Qt::ItemIsDragEnabled)) {
            QDrag *drag = new QDrag(this);
            QMimeData *mimeData = new QMimeData;
            const QList <QTreeWidgetItem *> list = selectedItems();
            QStringList ids;
            foreach(const QTreeWidgetItem *item, list) {
                if (item->type() == PROJECTFOLDERTYPE) {
                    const int children = item->childCount();
                    for (int i = 0; i < children; i++) {
                        ids.append(static_cast <ProjectItem *>(item->child(i))->clipId());
                    }
                } else {
                    const ProjectItem *clip = static_cast <const ProjectItem *>(item);
                    ids.append(clip->clipId());
                }
            }
            if (ids.isEmpty()) return;
            QByteArray data;
            data.append(ids.join(";").toUtf8()); //doc.toString().toUtf8());
            mimeData->setData("kdenlive/producerslist", data);
            //mimeData->setText(ids.join(";")); //doc.toString());
            //mimeData->setImageData(image);
            drag->setMimeData(mimeData);
            drag->setPixmap(it->data(0, Qt::DecorationRole).value<QPixmap>());
            drag->setHotSpot(QPoint(0, 50));
            drag->exec();
        }
        //event->accept();
    }
}

// virtual
void ProjectListView::dragMoveEvent(QDragMoveEvent * event)
{
    //event->setDropAction(Qt::MoveAction);
    if (event->mimeData()->hasText()) {
        event->acceptProposedAction();
    }
    // stop playing because we get a crash otherwise when fetching the thumbnails
    emit pauseMonitor();
}

QStringList ProjectListView::mimeTypes() const
{
    QStringList qstrList;
    qstrList << QTreeWidget::mimeTypes();
    // list of accepted mime types for drop
    qstrList.append("text/uri-list");
    qstrList.append("text/plain");
    qstrList.append("kdenlive/producerslist");
    qstrList.append("kdenlive/clip");
    return qstrList;
}


Qt::DropActions ProjectListView::supportedDropActions() const
{
    // returns what actions are supported when dropping
    return Qt::MoveAction;
}

#include "projectlistview.moc"

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