plasma-framework/widgets/icon.cpp

/*
 *   Copyright (C) 2007 by Aaron Seigo <aseigo@kde.org>
 *   Copyright (C) 2007 by Riccardo Iaconelli <riccardo@kde.org>
 *   Copyright (C) 2007 by Matt Broadstone <mbroadst@gmail.com>
 *   Copyright (C) 2006-2007 Fredrik Höglund <fredrik@kde.org>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License version 2 as
 *   published by the Free Software Foundation
 *
 *   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 Library 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 "icon.h"
#include "icon_p.h"

#include <QAction>
#include <QApplication>
#include <QPainter>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsView>
#include <QStyleOptionGraphicsItem>
#include <QTextLayout>

//#define BACKINGSTORE_BLUR_HACK

#ifdef BACKINGSTORE_BLUR_HACK
#include <private/qwindowsurface_p.h>
#endif

#include <KIcon>
#include <KImageEffect>
#include <KIconEffect>
#include <KIconLoader>
#include <K3Icon>
#include <KUrl>
#include <KRun>
#include <KMimeType>
#include <KDebug>

#include "phase.h"
#include "svg.h"
#include "effects/blur.cpp"

namespace Plasma
{

Icon::Private::Private()
    : svg("widgets/iconbutton"),
      svgElements(0),
      size(128*1.1, 128*1.1),
      iconSize(128, 128),
      state(Private::NoState),
      orientation(Qt::Vertical),
      calculateSizeRequested(true)          // First time always true
{
    svg.setContentType(Plasma::Svg::ImageSet);
    svg.resize(size);

    //TODO: recheck when svg changes
    checkSvgElements();
}

Icon::Private::~Private()
{
    qDeleteAll(cornerActions);
}

void Icon::Private::checkSvgElements()
{
    if (svg.elementExists("background")) {
        svgElements |= SvgBackground;
    }

    if (svg.elementExists("background-hover")) {
        svgElements |= SvgBackgroundHover;
    }

    if (svg.elementExists("background-pressed")) {
        svgElements |= SvgBackgroundPressed;
    }

    if (svg.elementExists("foreground")) {
        svgElements |= SvgForeground;
    }

    if (svg.elementExists("foreground-hover")) {
        svgElements |= SvgForegroundHover;
    }

    if (svg.elementExists("foreground-pressed")) {
        svgElements |= SvgForegroundPressed;
    }

    if (svg.elementExists("minibutton")) {
        svgElements |= SvgMinibutton;
    }

    if (svg.elementExists("minibutton-hover")) {
        svgElements |= SvgMinibuttonHover;
    }

    if (svg.elementExists("minibutton-pressed")) {
        svgElements |= SvgMinibuttonPressed;
    }
}



IconAction::IconAction(Icon* icon, QAction *action)
    : m_icon(icon),
      m_action(action),
      m_hovered(false),
      m_pressed(false),
      m_visible(false),
      m_animationId(-1)
{
}

void IconAction::show()
{
    if (m_animationId) {
        Phase::self()->stopElementAnimation(m_animationId);
    }

    rebuildPixmap();

    m_animationId = Phase::self()->animateElement(m_icon, Phase::ElementAppear);
    Phase::self()->setAnimationPixmap(m_animationId, m_pixmap);
    m_visible = true;
}

void IconAction::hide()
{
    if (m_animationId) {
        Phase::self()->stopElementAnimation(m_animationId);
    }

    rebuildPixmap();

    m_animationId = Phase::self()->animateElement(m_icon, Phase::ElementDisappear);
    Phase::self()->setAnimationPixmap(m_animationId, m_pixmap);
    m_visible = false;
}

bool IconAction::isVisible() const
{
    return m_visible;
}

bool IconAction::isPressed() const
{
    return m_pressed;
}

bool IconAction::isHovered() const
{
    return m_hovered;
}

void IconAction::setSelected(bool selected)
{
    m_selected = selected;
}

bool IconAction::isSelected() const
{
    return m_selected;
}

void IconAction::setRect(const QRectF &rect)
{
    m_rect = rect;
}

QRectF IconAction::rect() const
{
    return m_rect;
}

void IconAction::rebuildPixmap()
{
    // Determine proper QIcon mode based on selection status
    QIcon::Mode mode = QIcon::Normal;
    if (m_selected) {
        mode = QIcon::Selected;
    }

    // Draw everything
    m_pixmap = QPixmap(26, 26);
    m_pixmap.fill(Qt::transparent);

    int element = Icon::Private::SvgMinibutton;
    if (m_pressed) {
        element = Icon::Private::SvgMinibuttonPressed;
    } else if (m_hovered) {
        element = Icon::Private::SvgMinibuttonHover;
    }

    QPainter painter(&m_pixmap);
    m_icon->drawActionButtonBase(&painter, m_pixmap.size(), element);
    m_action->icon().paint(&painter, 2, 2, 22, 22, Qt::AlignCenter, mode);
}

bool IconAction::event(QEvent::Type type, const QPointF &pos)
{
    switch (type) {
    case QEvent::MouseButtonPress: {
        setSelected(m_rect.contains(pos));
        return isSelected();
        }
        break;

    case QEvent::MouseMove: {
        bool wasSelected = isSelected();
        bool active = m_rect.contains(pos);
        setSelected(wasSelected && active);
        return (wasSelected != isSelected()) || active;
        }
        break;

    case QEvent::MouseButtonRelease: {
        kDebug() << "IconAction::event got a QEvent::MouseButtonRelease, " << isSelected();
        bool wasSelected = isSelected();
        setSelected(false);
        if (wasSelected) {
            m_action->trigger();
        }

        return wasSelected;
        }
        break;

    case QEvent::GraphicsSceneHoverEnter:
        m_pressed = false;
        m_hovered = true;
        break;

    case QEvent::GraphicsSceneHoverLeave:
        m_pressed = false;
        m_hovered = false;
        break;

    default:
            break;
    }

    return false;
}

Phase::AnimId IconAction::animationId() const
{
    return m_animationId;
}

QAction* IconAction::action() const
{
    return m_action;
}

void IconAction::paint(QPainter *painter) const
{
    painter->drawPixmap(m_rect.toRect(), Phase::self()->animationResult(m_animationId));
}

Icon::Icon(QGraphicsItem *parent)
    : Plasma::Widget(parent),
      d(new Private)
{
    init();
}

Icon::Icon(const QString &text, QGraphicsItem *parent)
    : Plasma::Widget(parent),
      d(new Private)
{
    setText(text);
    init();
}

Icon::Icon(const QIcon &icon, const QString &text, QGraphicsItem *parent)
    : Plasma::Widget(parent),
      d(new Private)
{
    setText(text);
    setIcon(icon);
    init();
}

Icon::~Icon()
{
    delete d;
}

void Icon::init()
{
    // setAcceptedMouseButtons(Qt::LeftButton);
    setAcceptsHoverEvents(true);

    int focusHMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin);
    int focusVMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameVMargin);

    // Margins for horizontal mode (list views, tree views, table views)
    d->setHorizontalMargin(Private::TextMargin, focusHMargin, focusVMargin);
    d->setHorizontalMargin(Private::IconMargin, focusHMargin, focusVMargin);
    d->setHorizontalMargin(Private::ItemMargin, 0, 0);

    // Margins for vertical mode (icon views)
    d->setVerticalMargin(Private::TextMargin, 6, 2);
    d->setVerticalMargin(Private::IconMargin, focusHMargin, focusVMargin);
    d->setVerticalMargin(Private::ItemMargin, 0, 0);
}

void Icon::addAction(QAction *action)
{
    int count = d->cornerActions.count();
    if (count > 3) {
        kDebug() << "Icon::addAction(QAction*) no more room for more actions!";
    }

    IconAction* iconAction = new IconAction(this, action);
    d->cornerActions.append(iconAction);
    connect(action, SIGNAL(destroyed(QObject*)), this, SLOT(actionDestroyed(QObject*)));

    //TODO: fewer magic numbers, please =) 38, 32, 6, etc... needs to go.
    //      at the very least static const ints with nice names.
    switch (count) {
    case Private::TopLeft:
        iconAction->setRect(QRectF(6, 6, 32, 32));
        break;
    case Private::TopRight:
        iconAction->setRect(QRectF(d->size.width() - 38, 6, 32, 32));
        break;
    case Private::BottomLeft:
        iconAction->setRect(QRectF(6, d->size.height() - 38, 32, 32));
        break;
    case Private::BottomRight:
        iconAction->setRect(QRectF(d->size.width() - 38, d->size.height() - 38, 32, 32));
        break;
    }
}

void Icon::actionDestroyed(QObject* action)
{
    QList<IconAction*>::iterator it = d->cornerActions.begin();

    while (it != d->cornerActions.end()) {
        if ((*it)->action() == action) {
            d->cornerActions.erase(it);
            break;
        }
    }

    update();   // redraw since an action has been deleted.
}

QSizeF Icon::Private::displaySizeHint(const QStyleOptionGraphicsItem *option) const
{
    QString label = text;
    const qreal maxWidth = (orientation == Qt::Vertical) ? iconSize.width() + 10 : 32757;
    kDebug() << "Icon::Private::displaySizeHint maxWidth: " << maxWidth;

    // To compute the nominal size for the label + info, we'll just append
    // the information string to the label
    const QString info = infoText;
    if (!info.isEmpty())
        label += QString(QChar::LineSeparator) + info;

    QTextLayout layout;
    setLayoutOptions(layout, option);

    kDebug() << "Icon::Private::displaySizeHint maxWidth: " << maxWidth;
    QSizeF size = layoutText(layout, option, label, QSizeF(iconSize.width() + 10, 32757));
    kDebug() << "Icon::Private::displaySizeHint size.width: " << size.width();

    return addMargin(size, TextMargin);
}

void Icon::calculateSize(const QStyleOptionGraphicsItem *option)
{
    if (!d->calculateSizeRequested)
        return;

    prepareGeometryChange();
    d->setActiveMargins();

    const QSizeF displaySize    = d->displaySizeHint(option);
    const QSizeF decorationSize = d->addMargin(d->iconSize, Private::IconMargin);

    QSizeF newSize;
    if (d->orientation == Qt::Vertical)
    {
        newSize.rwidth()  = qMax(decorationSize.width(), displaySize.width());
        newSize.rheight() = decorationSize.height() + displaySize.height() + 1;
    }
    else
    {
        newSize.rwidth()  = decorationSize.width() + displaySize.width() + 1;
        newSize.rheight() = qMax(decorationSize.height(), displaySize.height());
    }

    kDebug() << "Icon::calculateSize newSize: " << newSize;
    d->size = d->addMargin(newSize, Private::ItemMargin);
    d->svg.resize(d->size);
    d->calculateSizeRequested = false;

    int count = 0;
    foreach (IconAction* iconAction, d->cornerActions) {
        //TODO: fewer magic numbers, please =) 38, 32, 6, etc... needs to go.
        //      at the very least static const ints with nice names.
        switch (count) {
        case Private::TopLeft:
            // top left never changes, so don't bother setting it
            //iconAction->setRect(QRectF(6, 6, 32, 32));
            break;
        case Private::TopRight:
            iconAction->setRect(QRectF(d->size.width() - 38, 6, 32, 32));
            break;
        case Private::BottomLeft:
            iconAction->setRect(QRectF(6, d->size.height() - 38, 32, 32));
            break;
        case Private::BottomRight:
            iconAction->setRect(QRectF(d->size.width() - 38, d->size.height() - 38, 32, 32));
            break;
        }

        ++count;
    }

    update();
}

QRectF Icon::boundingRect() const
{
    return QRectF(QPointF(0, 0), d->size);
}

void Icon::Private::drawBackground(QPainter *painter)
{
    QString element;
    if (svgElements & Private::SvgBackground) {
        element = "background";
    }

    switch (state) {
        case Private::NoState:
            break;
        case Private::HoverState:
            if (svgElements & Private::SvgBackgroundHover) {
                element = "background-hover";
            }
            break;
        case Private::PressedState:
            if (svgElements & Private::SvgBackgroundPressed) {
                element = "background-pressed";
            } else if (svgElements & Private::SvgBackgroundHover) {
                element = "background-hover";
            }
            break;
    }

    if (!element.isEmpty()) {
        svg.paint(painter, 0, 0, element);
    }
}

void Icon::Private::drawForeground(QPainter *painter)
{
    QString element;
    if (svgElements & Private::SvgForeground) {
        element = "foreground";
    }

    switch (state) {
        case Private::NoState:
            break;
        case Private::HoverState:
            if (svgElements & Private::SvgForegroundHover) {
                element = "foreground-hover";
            }
            break;
        case Private::PressedState:
            if (svgElements & Private::SvgForegroundPressed) {
                element = "foreground-pressed";
            } else if (svgElements & Private::SvgForegroundHover) {
                element = "foreground-hover";
            }
            break;
    }

    if (!element.isEmpty()) {
        svg.paint(painter, 0, 0, element);
    }
}

QPixmap Icon::Private::decoration(const QStyleOptionGraphicsItem *option) const
{
    QPixmap result;

    QIcon::Mode mode   = option->state & QStyle::State_Enabled ? QIcon::Normal : QIcon::Disabled;
    QIcon::State state = option->state & QStyle::State_Open ? QIcon::On : QIcon::Off;
    const QSize size = icon.actualSize(iconSize.toSize(), mode, state);
    result = icon.pixmap(size, mode, state);

    if (!result.isNull())
    {
        // Apply the configured hover effect    NOTE: This has no visible effect because we 
        //                                            do drawForeground() -MB
        if (option->state & QStyle::State_MouseOver) {
            KIconEffect *effect = KIconLoader::global()->iconEffect();

            // Note that in KIconLoader terminology, active = hover.
            // ### We're assuming that the icon group is desktop/filemanager, since this
            //     is KFileItemDelegate.
            if (effect->hasEffect(K3Icon::Desktop, K3Icon::ActiveState)) {
                result = effect->apply(result, K3Icon::Desktop, K3Icon::ActiveState);
            }
        }
    }

    return result;
}

QPointF Icon::Private::iconPosition(const QStyleOptionGraphicsItem *option, const QPixmap &pixmap) const
{
    const QRectF itemRect = subtractMargin(option->rect, Private::ItemMargin);
    Qt::Alignment alignment = Qt::AlignHCenter | Qt::AlignTop;  // NOTE: This assumes always top-center -MB

    // Compute the nominal decoration rectangle
    const QSizeF size = addMargin(iconSize, Private::IconMargin);
    const QRect iconRect = QStyle::alignedRect(option->direction, alignment, size.toSize(), itemRect.toRect());

    // Position the pixmap in the center of the rectangle
    QRect pixmapRect = pixmap.rect();
    pixmapRect.moveCenter(iconRect.center());

    // add a gimmicky margin of 5px to y, TEMP TEMP TEMP
    // pixmapRect = pixmapRect.adjusted(0, 5, 0, 0);

    return QPointF(pixmapRect.topLeft());
}

QRectF Icon::Private::labelRectangle(const QStyleOptionGraphicsItem *option, const QPixmap &icon,
                                    const QString &string) const
{
    Q_UNUSED(string)

    if (icon.isNull())
        return option->rect;

    const QSizeF decoSize = addMargin(iconSize, Private::IconMargin); 

    kDebug() << "Icon::Private::labelRectangle option->rect: " << option->rect;
    const QRectF itemRect = subtractMargin(option->rect, Private::ItemMargin);
    QRectF textArea(QPointF(0, 0), itemRect.size());

    textArea.setTop(decoSize.height() + 1);
    textArea.translate(itemRect.topLeft());
    return QRectF(QStyle::visualRect(option->direction, option->rect, textArea.toRect()));
}

// Lays the text out in a rectangle no larger than constraints, eliding it as necessary
QSizeF Icon::Private::layoutText(QTextLayout &layout, const QStyleOptionGraphicsItem *option,
                                const QString &text, const QSizeF &constraints) const
{
    const QSizeF size = layoutText(layout, text, constraints.width());

    if (size.width() > constraints.width() || size.height() > constraints.height())
    {
        const QString elided = elidedText(layout, option, constraints);
        return layoutText(layout, elided, constraints.width());
    }

    return size;
}

// Lays the text out in a rectangle no wider than maxWidth
QSizeF Icon::Private::layoutText(QTextLayout &layout, const QString &text, qreal maxWidth) const
{
    QFontMetricsF metrics(layout.font());
    qreal leading     = metrics.leading();
    qreal height      = 0.0;
    qreal widthUsed   = 0.0;
    QTextLine line;

    layout.setText(text);

    layout.beginLayout();

//    kDebug() << "layoutText called with maxWidth: " << maxWidth;
    while ((line = layout.createLine()).isValid())
    {
        line.setLineWidth(maxWidth);
        height += leading;
        line.setPosition(QPointF(0.0, height));
        height += line.height();
        widthUsed = qMax(widthUsed, line.naturalTextWidth());
    }
    layout.endLayout();

//    return layout.boundingRect().size();          // ARGH!
    return QSizeF(widthUsed, height);
}

// Elides the text in the layout, by iterating over each line in the layout, eliding
// or word breaking the line if it's wider than the max width, and finally adding an
// ellipses at the end of the last line, if there are more lines than will fit within
// the vertical size constraints.
QString Icon::Private::elidedText(QTextLayout &layout, const QStyleOptionGraphicsItem *option,
                                  const QSizeF &size) const
{
    Q_UNUSED(option)

    QFontMetricsF metrics(layout.font());
    const QString text = layout.text();
    qreal maxWidth       = size.width();
    qreal maxHeight      = size.height();
    qreal height         = 0;

    // If the string contains a single line of text it shouldn't be word wrapped
    if (text.indexOf(QChar::LineSeparator) == -1)
        return metrics.elidedText(text, Qt::ElideRight, maxWidth);

    // Elide each line that has already been laid out in the layout.
    QString elided;
    elided.reserve(text.length());

    for (int i = 0; i < layout.lineCount(); i++)
    {
        QTextLine line = layout.lineAt(i);
        int start  = line.textStart();
        int length = line.textLength();

        height += metrics.leading();
        if (height + line.height() + metrics.lineSpacing() > maxHeight)
        {
            // Unfortunately, if the line ends because of a line separator, elidedText() will be too
            // clever and keep adding lines until it finds one that's too wide.
            if (line.naturalTextWidth() < maxWidth && text[start + length - 1] == QChar::LineSeparator)
                elided += text.mid(start, length - 1);
            else
                elided += metrics.elidedText(text.mid(start), Qt::ElideRight, maxWidth);
            break;
        }
        else if (line.naturalTextWidth() > maxWidth)
            elided += metrics.elidedText(text.mid(start, length), Qt::ElideRight, maxWidth);
        else
            elided += text.mid(start, length);

        height += line.height();
    }

    return elided;
}

void Icon::Private::layoutTextItems(const QStyleOptionGraphicsItem *option,
                                    const QPixmap &icon, QTextLayout *labelLayout,
                                    QTextLayout *infoLayout, QRectF *textBoundingRect) const
{
    bool showInformation = false;

    setLayoutOptions(*labelLayout, option);

    QFontMetricsF fm(labelLayout->font());
    const QRectF textArea = labelRectangle(option, icon, text);
    QRectF textRect       = subtractMargin(textArea, Private::TextMargin);

    // Sizes and constraints for the different text parts
    QSizeF maxLabelSize = textRect.size();
    QSizeF maxInfoSize  = textRect.size();
    QSizeF labelSize;
    QSizeF infoSize;

    // If we have additional info text, and there's space for at least two lines of text,
    // adjust the max label size to make room for at least one line of the info text
    if (!infoText.isEmpty() && textRect.height() >= fm.lineSpacing() * 2)
    {
        infoLayout->setFont(labelLayout->font());
        infoLayout->setTextOption(labelLayout->textOption());

        maxLabelSize.rheight() -= fm.lineSpacing();
        showInformation = true;
    }

    // Lay out the label text, and adjust the max info size based on the label size
    kDebug() << "Icon::Private::layoutTextItems maxLabelSize: " << maxLabelSize;
    labelSize = layoutText(*labelLayout, option, text, maxLabelSize);
    maxInfoSize.rheight() -= labelSize.height();

    // Lay out the info text
    if (showInformation)
        infoSize = layoutText(*infoLayout, option, infoText, maxInfoSize);
    else
        infoSize = QSizeF(0, 0);

    // Compute the bounding rect of the text
    const Qt::Alignment alignment = labelLayout->textOption().alignment();
    const QSizeF size(qMax(labelSize.width(), infoSize.width()), labelSize.height() + infoSize.height());
    *textBoundingRect = QStyle::alignedRect(option->direction, alignment, size.toSize(), textRect.toRect());

    // Compute the positions where we should draw the layouts
    labelLayout->setPosition(QPointF(textRect.x(), textBoundingRect->y()));
    infoLayout->setPosition(QPointF(textRect.x(), textBoundingRect->y() + labelSize.height()));
}

QBrush Icon::Private::foregroundBrush(const QStyleOptionGraphicsItem *option) const
{
    const QPalette::ColorGroup group = option->state & QStyle::State_Enabled ?
            QPalette::Normal : QPalette::Disabled;

    // Always use the highlight color for selected items
    if (option->state & QStyle::State_Selected)
        return option->palette.brush(group, QPalette::HighlightedText);

    return option->palette.brush(group, QPalette::Text);
}

QBrush Icon::Private::backgroundBrush(const QStyleOptionGraphicsItem *option) const
{
    const QPalette::ColorGroup group = option->state & QStyle::State_Enabled ?
            QPalette::Normal : QPalette::Disabled;

    QBrush background(Qt::NoBrush);

    // Always use the highlight color for selected items
    if (option->state & QStyle::State_Selected)
        background = option->palette.brush(group, QPalette::Highlight);

    return background;
}

void Icon::Private::drawTextItems(QPainter *painter, const QStyleOptionGraphicsItem *option,
                                  const QTextLayout &labelLayout, const QTextLayout &infoLayout) const
{
    QPen pen(foregroundBrush(option), 0);
    painter->setPen(pen);
    labelLayout.draw(painter, QPointF());

    if (!infoLayout.text().isEmpty())
    {
        QColor color;
        if (option->state & QStyle::State_Selected)
        {
            color = option->palette.color(QPalette::HighlightedText);
            color.setAlphaF(.5);
        } else
            color = option->palette.color(QPalette::Highlight);

        painter->setPen(color);
        infoLayout.draw(painter, QPointF());
    }
}


void Icon::paintWidget(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    Q_UNUSED(option)
    Q_UNUSED(widget)

#ifdef BACKINGSTORE_BLUR_HACK
     if (d->state == Private::HoverState && scene()) {
         QList<QGraphicsView*> views = scene()->views();
         if (views.count() > 0) {
             QPixmap* pix = static_cast<QPixmap*>(views[0]->windowSurface()->paintDevice());
             QImage image(boundingRect().size().toSize(), QImage::Format_ARGB32_Premultiplied);
             {
                 QPainter p(&image);
                 p.drawPixmap(image.rect(), *pix, sceneBoundingRect());
             }
             expblur<16,7>(image, 8);
             painter->drawImage(0, 0, image);
         }
     }
#endif

    calculateSize(option);
    d->setActiveMargins();

    // Compute the metrics, and lay out the text items
    // ========================================================================
    QPixmap icon         = d->decoration(option);
    const QPointF iconPos = d->iconPosition(option, icon);

    QTextLayout labelLayout, infoLayout;
    QRectF textBoundingRect;
    d->layoutTextItems(option, icon, &labelLayout, &infoLayout, &textBoundingRect);

    d->svg.resize(d->size);
    d->drawBackground(painter);

    // draw icon
    painter->drawPixmap(iconPos, icon);

    d->drawForeground(painter);

    // Draw corner actions
    foreach (IconAction *action, d->cornerActions) {
        if (action->animationId()) {
            action->paint(painter);
        }
    }

    // Draw text last because its overlayed
    d->drawTextItems(painter, option, labelLayout, infoLayout);

}

void Icon::drawActionButtonBase(QPainter* painter, const QSize &size, int element)
{
    // Determine proper svg element
    QString id;
    if (d->svgElements & Private::SvgMinibutton) {
        id = "minibutton";
    }

    if (element == Private::SvgMinibuttonPressed) {
        if (d->svgElements & Private::SvgMinibuttonPressed) {
            id = "minibutton-pressed";
        } else if (d->svgElements & Private::SvgMinibuttonHover) {
            id = "minibutton-hover";
        }
    } else if (element == Icon::Private::SvgMinibuttonHover &&
               d->svgElements & Private::SvgMinibuttonHover) {
        id = "minibutton-hover";
    }

    if (!id.isEmpty()) {
        d->svg.resize(size);
        d->svg.paint(painter, 0, 0, id);
    }
}


void Icon::setText(const QString& text)
{
    d->text = text;
    d->calculateSizeRequested = true;
}

QString Icon::text() const
{
    return d->text;
}

void Icon::setInfoText(const QString& text)
{
    d->infoText = text;
    d->calculateSizeRequested = true;
}

QString Icon::infoText() const
{
    return d->infoText;
}

void Icon::setIcon(const QString& icon)
{
    if (icon.isEmpty()) {
        setIcon(QIcon());
        return;
    }

    setIcon(KIcon(icon));
}

void Icon::setIcon(const QIcon& icon)
{
    d->icon = icon;
    d->calculateSizeRequested = true;
}

QSizeF Icon::iconSize() const
{
    return d->iconSize;
}

void Icon::setIconSize(const QSizeF& s)
{
    d->iconSize = s;
    d->calculateSizeRequested = true;
}

void Icon::setIconSize(int w, int h)
{
    setIconSize(QSizeF(w, h));
}

bool Icon::isDown()
{
    return d->state == Private::PressedState;
}

void Icon::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    foreach (IconAction *action, d->cornerActions) {
        action->event(event->type(), event->pos());
    }

    d->state = Private::PressedState;

    QGraphicsItem::mousePressEvent(event);
    update();
}

void Icon::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    bool inside = boundingRect().contains(event->pos());
    Private::ButtonState was = d->state;

    if (inside) {
        d->state = Private::HoverState;

        foreach (IconAction *action, d->cornerActions) {
            if (action->event(event->type(), event->pos())) {
                inside = false;
                break;
            }
        }
    }
    else if (was == Private::PressedState) {
        emit pressed(false);

        if (inside) {
            emit clicked();
        }
        d->state = Private::NoState;
    }
    else {
        d->state = Private::NoState;
    }

    QGraphicsItem::mouseReleaseEvent(event);
    update();
}

void Icon::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
    foreach (IconAction *action, d->cornerActions) {
        action->show();
        action->event(event->type(), event->pos());
    }

    d->state = Private::HoverState;
    QGraphicsItem::hoverEnterEvent(event);
}

void Icon::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
    foreach (IconAction *action, d->cornerActions) {
        action->hide();
        action->event(event->type(), event->pos());
    }

    d->state = Private::NoState;
    QGraphicsItem::hoverLeaveEvent(event);
}

void Icon::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    if (d->state == Private::PressedState) {
        d->state = Private::HoverState;
    }

    QGraphicsItem::mouseMoveEvent(event);
}

QSizeF Icon::sizeHint() const
{
    return d->size;
}

QSizeF Icon::minimumSize() const
{
    return d->size; // probably should be more flexible on this =)
}

QSizeF Icon::maximumSize() const
{
    return d->size;
}

Qt::Orientations Icon::expandingDirections() const
{
    return Qt::Horizontal;
}

bool Icon::hasHeightForWidth() const
{
    return true;
}

qreal Icon::heightForWidth(qreal w) const
{
    return w; //FIXME: we shouldn't assume squareness but actually calculate based on text and what not
}

bool Icon::hasWidthForHeight() const
{
    return true;
}

qreal Icon::widthForHeight(qreal h) const
{
    return h; //FIXME: we shouldn't assume squareness but actually calculate based on text and what not
}

QRectF Icon::geometry() const
{
    return boundingRect();
}

void Icon::setGeometry(const QRectF &r)
{
    // TODO: this is wrong, but we should probably never call setGeometry anyway!
    setIconSize(r.size());
    setPos(r.x(),r.y());
}

} // namespace Plasma

#include "icon.moc"