effectslistwidget.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 "effectslistwidget.h"
#include "effectslist.h"
#include "mainwindow.h"

#include "KDebug"

#include "QApplication"
#include "QMouseEvent"
#include <QMenu>


static const int EFFECT_VIDEO = 1;
static const int EFFECT_AUDIO = 2;
static const int EFFECT_CUSTOM = 3;

const int TypeRole = Qt::UserRole;
const int IdRole = TypeRole + 1;

EffectsListWidget::EffectsListWidget(QMenu *menu, QWidget *parent) :
        KListWidget(parent),
        m_menu(menu)
{
    //setSelectionMode(QAbstractItemView::ExtendedSelection);
    //setDragDropMode(QAbstractItemView::DragDrop);
    setDropIndicatorShown(true);
    setAlternatingRowColors(true);
    setSortingEnabled(true);
    setDragEnabled(true);
    setAcceptDrops(true);
    initList();
}

EffectsListWidget::~EffectsListWidget()
{
}

void EffectsListWidget::initList()
{
    clear();
    QListWidgetItem *item;
    QString effectName;
    QStringList effectInfo;
    KIcon videoIcon("kdenlive-show-video");
    KIcon audioIcon("kdenlive-show-audio");
    int ct = MainWindow::videoEffects.count();
    for (int ix = 0; ix < ct; ix ++) {
        effectInfo = MainWindow::videoEffects.effectIdInfo(ix);
        if (!effectInfo.isEmpty()) {
            item = new QListWidgetItem(videoIcon, effectInfo.takeFirst(), this);
            item->setData(TypeRole, QString::number((int) EFFECT_VIDEO));
            item->setData(IdRole, effectInfo);
        }
    }

    ct = MainWindow::audioEffects.count();
    for (int ix = 0; ix < ct; ix ++) {
        effectInfo = MainWindow::audioEffects.effectIdInfo(ix);
        if (!effectInfo.isEmpty()) {
            item = new QListWidgetItem(audioIcon, effectInfo.takeFirst(), this);
            item->setData(TypeRole, QString::number((int) EFFECT_AUDIO));
            item->setData(IdRole, effectInfo);
        }
    }

    ct = MainWindow::customEffects.count();
    for (int ix = 0; ix < ct; ix ++) {
        effectInfo = MainWindow::customEffects.effectIdInfo(ix);
        if (!effectInfo.isEmpty()) {
            item = new QListWidgetItem(effectInfo.takeFirst(), this);
            item->setData(TypeRole, QString::number((int) EFFECT_CUSTOM));
            item->setData(IdRole, effectInfo);
        }
    }
}

QDomElement EffectsListWidget::currentEffect()
{
    return itemEffect(currentItem());
}

QDomElement EffectsListWidget::itemEffect(QListWidgetItem *item)
{
    QDomElement effect;
    if (!item) return effect;
    QStringList effectInfo = item->data(IdRole).toStringList();
    kDebug() << "// EFFECT SELECTED: " << effectInfo;
    switch (item->data(TypeRole).toInt()) {
    case 1:
        effect =  MainWindow::videoEffects.getEffectByTag(effectInfo.at(0), effectInfo.at(1));
        break;
    case 2:
        effect = MainWindow::audioEffects.getEffectByTag(effectInfo.at(0), effectInfo.at(1));
        break;
    default:
        effect = MainWindow::customEffects.getEffectByTag(effectInfo.at(0), effectInfo.at(1));
        break;
    }
    return effect;
}


QString EffectsListWidget::currentInfo()
{
    QListWidgetItem *item = currentItem();
    if (!item) return QString();
    QString info;
    QStringList effectInfo = item->data(IdRole).toStringList();
    switch (item->data(TypeRole).toInt()) {
    case 1:
        info = MainWindow::videoEffects.getInfo(effectInfo.at(0), effectInfo.at(1));
        break;
    case 2:
        info = MainWindow::audioEffects.getInfo(effectInfo.at(0), effectInfo.at(1));
        break;
    default:
        info = MainWindow::customEffects.getInfo(effectInfo.at(0), effectInfo.at(1));
        break;
    }
    return info;
}

// virtual
void EffectsListWidget::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton) {
        m_DragStartPosition = event->pos();
        m_dragStarted = true;
    }
    KListWidget::mousePressEvent(event);
}

// virtual
void EffectsListWidget::mouseMoveEvent(QMouseEvent *event)
{
    if (!m_dragStarted) return;
    if ((event->pos() - m_DragStartPosition).manhattanLength()
            < QApplication::startDragDistance())
        return;

    {
        QListWidgetItem *clickItem = itemAt(event->pos());
        if (clickItem) {
            QDrag *drag = new QDrag(this);
            QMimeData *mimeData = new QMimeData;
            const QList <QListWidgetItem *>list = selectedItems();
            QDomDocument doc;
            foreach(QListWidgetItem *item, list) {
                QDomElement e = itemEffect(item);
                if (!e.isNull()) doc.appendChild(doc.importNode(e, true));
            }
            QByteArray data;
            data.append(doc.toString().toUtf8());
            mimeData->setData("kdenlive/effectslist", data);
            drag->setMimeData(mimeData);
            //QPixmap pix = qVariantValue<QPixmap>(clickItem->data(Qt::DecorationRole));
            //drag->setPixmap(pix);
            //drag->setHotSpot(QPoint(0, 50));
            drag->start(Qt::MoveAction);
        }
        //event->accept();
    }
}

void EffectsListWidget::dragMoveEvent(QDragMoveEvent * event)
{
    event->setDropAction(Qt::IgnoreAction);
    //if (item) {
    event->setDropAction(Qt::MoveAction);
    if (event->mimeData()->hasText()) {
        event->acceptProposedAction();
    }
    //}
}

//virtual
void EffectsListWidget::contextMenuEvent(QContextMenuEvent * event)
{
    QListWidgetItem *item = itemAt(event->pos());
    if (item && item->data(TypeRole).toInt() == EFFECT_CUSTOM) m_menu->popup(event->globalPos());
}

#include "effectslistwidget.moc"