viewmode.cpp 10.9 KB
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/***************************************************************************
    begin                : Sat Jun 7 2003
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    copyright            : (C) 2003 - 2004 by Scott Wheeler, 
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    email                : wheeler@kde.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.                                   *
 *                                                                         *
 ***************************************************************************/

#include <kiconloader.h>
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#include <kdebug.h>
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#include <qpixmap.h>
#include <qpainter.h>

#include "viewmode.h"
#include "playlistbox.h"
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#include "searchplaylist.h"
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#include "treeviewitemplaylist.h"
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#include "collectionlist.h"
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////////////////////////////////////////////////////////////////////////////////
// ViewMode
////////////////////////////////////////////////////////////////////////////////

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ViewMode::ViewMode(PlaylistBox *b) :
    QObject(b),
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    m_playlistBox(b),
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    m_visible(false),
    m_needsRefresh(false)
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{
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    m_playlistBox->viewport()->installEventFilter(this);
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}

ViewMode::~ViewMode()
{

}

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void ViewMode::paintCell(PlaylistBox::Item *item,
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                         QPainter *painter, 
                         const QColorGroup &colorGroup,
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                         int column, int width, int)
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{
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    if(width < item->pixmap(column)->width())
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	return;

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    if(m_needsRefresh)
	updateHeights();

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    QFontMetrics fm = painter->fontMetrics();

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    int y = item->listView()->itemMargin() + border;
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    const QPixmap *pm = item->pixmap(column);

    if(item->isSelected()) {
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        painter->eraseRect(0, 0, width, item->height());

        QPen oldPen = painter->pen();
        QPen newPen = oldPen;

        newPen.setWidth(5);
        newPen.setJoinStyle(RoundJoin);
        newPen.setColor(QColorGroup::Highlight);

        painter->setPen(newPen);
        painter->drawRect(border, border, width - border * 2, item->height() - border * 2 + 1);
        painter->setPen(oldPen);

        painter->fillRect(border, border, width - border * 2, item->height() - border * 2 + 1,
                          colorGroup.brush(QColorGroup::Highlight));
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        painter->setPen(colorGroup.highlightedText());
    }
    else
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        painter->eraseRect(0, 0, width, item->height());
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    if (!pm->isNull()) {
        int x = (width - pm->width()) / 2;
        x = QMAX(x, item->listView()->itemMargin());
        painter->drawPixmap(x, y, *pm);
    }
    y += pm->height() + fm.height() - fm.descent();
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    for(QStringList::Iterator it = m_lines[item].begin(); it != m_lines[item].end(); ++it) {
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        int x = (width - fm.width(*it)) / 2;
        x = QMAX(x, item->listView()->itemMargin());
        painter->drawText(x, y, *it);
        y += fm.height() - fm.descent();
    }
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    if(item == item->listView()->dropItem())
        paintDropIndicator(painter, width, item->height());
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}

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bool ViewMode::eventFilter(QObject *watched, QEvent *e)
{
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    if(m_visible && watched == m_playlistBox->viewport() && e->type() == QEvent::Resize) {
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        QResizeEvent *re = static_cast<QResizeEvent *>(e);
        if(re->size().width() != re->oldSize().width())
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            m_needsRefresh = true;
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    }
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    if(e->type() == QEvent::Hide)
	m_needsRefresh = true;
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    return QObject::eventFilter(watched, e);
}

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void ViewMode::setShown(bool shown)
{
    m_visible = shown;
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    if(shown) {
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        updateIcons(32);
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	m_needsRefresh = true;
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    }
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}

void ViewMode::updateIcons(int size)
{
    for(QListViewItemIterator it(m_playlistBox); it.current(); ++it) {
        PlaylistBox::Item *i = static_cast<PlaylistBox::Item *>(*it);
        i->setPixmap(0, SmallIcon(i->iconName(), size));
    }
}

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void ViewMode::setupItem(PlaylistBox::Item *item) const
{
    const PlaylistBox *box = item->listView();
    const int width = box->width() - box->verticalScrollBar()->width() - border * 2;
    const int baseHeight = 2 * box->itemMargin() + 32 + border * 2;
    const QFontMetrics fm = box->fontMetrics();
    item->setHeight(baseHeight + (fm.height() - fm.descent()) * lines(item, fm, width).count());
}

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void ViewMode::updateHeights()
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{
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    const int width = m_playlistBox->width() - m_playlistBox->verticalScrollBar()->width() - border * 2;
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    const int baseHeight = 2 * m_playlistBox->itemMargin() + 32 + border * 2;
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    const QFontMetrics fm = m_playlistBox->fontMetrics();

    for(QListViewItemIterator it(m_playlistBox); it.current(); ++it) {
        PlaylistBox::Item *i = static_cast<PlaylistBox::Item *>(it.current());
        m_lines[i] = lines(i, fm, width);
        const int height = baseHeight + (fm.height() - fm.descent()) * m_lines[i].count();
        i->setHeight(height);
    }
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    m_needsRefresh = false;
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}

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void ViewMode::paintDropIndicator(QPainter *painter, int width, int height) // static
{
    static const int border = 1;
    static const int lineWidth = 2;

    QPen oldPen = painter->pen();
    QPen newPen = oldPen;

    newPen.setWidth(lineWidth);
    newPen.setStyle(DotLine);

    painter->setPen(newPen);
    painter->drawRect(border, border, width - border * 2, height - border * 2);
    painter->setPen(oldPen);
}

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QStringList ViewMode::lines(const PlaylistBox::Item *item,
			    const QFontMetrics &fm,
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			    int width)
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{
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    // Here 32 is a bit arbitrary, but that's the width of the icons in this
    // mode and seems to a reasonable lower bound.

    if(width < 32)
	return QStringList();

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    QString line = item->text();

    QStringList l;

    while(!line.isEmpty()) {
        int textLength = line.length();
        while(textLength > 0 && 
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              fm.width(line.mid(0, textLength).stripWhiteSpace()) +
	      item->listView()->itemMargin() * 2 > width)
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        {
            int i = line.findRev(QRegExp( "\\W"), textLength - 1);
            if(i > 0)
                textLength = i;
            else
                textLength--;
        }
        
        l.append(line.mid(0, textLength).stripWhiteSpace());
        line = line.mid(textLength);
    }
    return l;
}

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///////////////////////////////////////////////////////////////////////////////
// CompactViewMode
////////////////////////////////////////////////////////////////////////////////

CompactViewMode::CompactViewMode(PlaylistBox *b) : ViewMode(b)
{

}

CompactViewMode::~CompactViewMode()
{

}

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void CompactViewMode::paintCell(PlaylistBox::Item *item,
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                                QPainter *painter, 
                                const QColorGroup &colorGroup,
                                int column, int width, int align)
{
    item->KListViewItem::paintCell(painter, colorGroup, column, width, align);
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    if(item == item->listView()->dropItem())
        paintDropIndicator(painter, width, item->height());
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}

void CompactViewMode::setShown(bool shown)
{
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    setVisible(shown);

    if(shown) {
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        updateIcons(16);
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	updateHeights();
    }
}

void CompactViewMode::updateHeights()
{
    for(QListViewItemIterator it(playlistBox()); it.current(); ++it)
	it.current()->setup();
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}

////////////////////////////////////////////////////////////////////////////////
// TreeViewMode
////////////////////////////////////////////////////////////////////////////////

TreeViewMode::TreeViewMode(PlaylistBox *b) : CompactViewMode(b)
{

}

TreeViewMode::~TreeViewMode()
{

}

void TreeViewMode::setShown(bool show)
{
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    CompactViewMode::setShown(show);

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    playlistBox()->setRootIsDecorated(show);

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    if(show) {
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        PlaylistBox::Item *collectionItem = PlaylistBox::Item::collectionItem();
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        if(!collectionItem)
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            return;

        if(collectionItem && m_searchCategories.isEmpty())
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            setupCategories();
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        else {
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            for(QDictIterator<PlaylistBox::Item> it(m_searchCategories); it.current(); ++it)
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                it.current()->setVisible(true);
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        }
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    }
    else {
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        for(QDictIterator<PlaylistBox::Item> it(m_searchCategories); it.current(); ++it)
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            it.current()->setVisible(false);
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    }
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}
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void TreeViewMode::slotRemoveItem(const QString &item, unsigned column)
{
    QString itemKey;
    if(column == PlaylistItem::ArtistColumn)
        itemKey = "artists" + item.lower();
    else if(column == PlaylistItem::GenreColumn)
        itemKey = "genres" + item.lower();
    else if(column == PlaylistItem::AlbumColumn)
        itemKey = "albums" + item.lower();
    else {
        kdWarning() << k_funcinfo << "Unhandled column type " << column << endl;
        return;
    }

    if(!m_treeViewItems.contains(itemKey))
        return;

    TreeViewItemPlaylist *itemPlaylist = m_treeViewItems[itemKey];
    m_treeViewItems.remove(itemKey);
    itemPlaylist->deleteLater();
    emit signalPlaylistDestroyed(itemPlaylist);
}

void TreeViewMode::slotAddItem(const QString &item, unsigned column)
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{
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    QValueList<int> columns;
    columns.append(column);
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    QString itemKey, searchCategory;
    if(column == PlaylistItem::ArtistColumn)
        searchCategory = "artists";
    else if(column == PlaylistItem::GenreColumn)
        searchCategory = "genres";
    else if(column == PlaylistItem::AlbumColumn)
        searchCategory = "albums";
    else {
        kdWarning() << k_funcinfo << "Unhandled column type " << column << endl;
        return;
    }
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    itemKey = searchCategory + item.lower();

    if(m_treeViewItems.contains(itemKey))
        return;
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    PlaylistSearch::ComponentList components;
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    PlaylistSearch::Component::MatchMode mode = PlaylistSearch::Component::ContainsWord;
    if(column != PlaylistItem::ArtistColumn)
        mode = PlaylistSearch::Component::Exact;
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    components.append(PlaylistSearch::Component(item, true, columns, mode));
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    PlaylistList playlists;
    playlists.append(CollectionList::instance());
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    PlaylistSearch s(playlists, components, PlaylistSearch::MatchAny, false);
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    TreeViewItemPlaylist *p = new TreeViewItemPlaylist(playlistBox(), s, item, false);
    playlistBox()->setupPlaylist(p, "midi", m_searchCategories[searchCategory]);
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    m_treeViewItems[itemKey] = p;
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}
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void TreeViewMode::setupCategories()
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{
    PlaylistBox::Item *i;
    PlaylistBox::Item *collectionItem = PlaylistBox::Item::collectionItem();
    
    i = new PlaylistBox::Item(collectionItem, "cdimage", i18n("Artists"));
    m_searchCategories.insert("artists", i);

    i = new PlaylistBox::Item(collectionItem, "cdimage", i18n("Albums"));
    m_searchCategories.insert("albums", i);

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    i = new PlaylistBox::Item(collectionItem, "cdimage", i18n("Genres"));
    m_searchCategories.insert("genres", i);

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    for(QDictIterator<PlaylistBox::Item> it(m_searchCategories); it.current(); ++it)
        it.current()->setSortedFirst(true);
}

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#include "viewmode.moc"