rollupwidget.cpp

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#include <QEvent>
#include <QPainter>
#include <QMouseEvent>
#include "gui/rollupwidget.h"
#include "ui_glspectrumgui.h"

RollupWidget::RollupWidget(QWidget* parent) :
    QWidget(parent),
    m_highlighted(false),
    m_contextMenuType(ContextMenuNone),
    m_streamIndicator("S")
{
    setMinimumSize(250, 150);
    setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
    setBackgroundRole(QPalette::Window);

    setAutoFillBackground(false);
    setAttribute(Qt::WA_OpaquePaintEvent, true);

    // Vorgaben aus der Palette
    m_titleColor = palette().highlight().color();
    m_titleTextColor = palette().highlightedText().color();
}

QByteArray RollupWidget::saveState(int version) const
{
    QByteArray state;
    QDataStream stream(&state, QIODevice::WriteOnly);
    int count = 0;

    for(int i = 0; i < children().count(); ++i) {
        QWidget* r = qobject_cast<QWidget*>(children()[i]);
        if(r != NULL)
            count++;
    }

    stream << VersionMarker;
    stream << version;
    stream << count;

    for(int i = 0; i < children().count(); ++i) {
        QWidget* r = qobject_cast<QWidget*>(children()[i]);
        if(r != NULL) {
            stream << r->objectName();
            if(r->isHidden())
                stream << (int)0;
            else stream << (int)1;
        }
    }

    return state;
}

bool RollupWidget::restoreState(const QByteArray& state, int version)
{
    if(state.isEmpty())
        return false;
    QByteArray sd = state;
    QDataStream stream(&sd, QIODevice::ReadOnly);
    int marker, v;
    stream >> marker;
    stream >> v;
    if((stream.status() != QDataStream::Ok) || (marker != VersionMarker) || (v != version))
        return false;

    int count;
    stream >> count;

    if(stream.status() != QDataStream::Ok)
        return false;
    for(int i = 0; i < count; ++i) {
        QString name;
        int visible;

        stream >> name;
        stream >> visible;

        if(stream.status() != QDataStream::Ok)
            return false;

        for(int j = 0; j < children().count(); ++j) {
            QWidget* r = qobject_cast<QWidget*>(children()[j]);
            if(r != NULL) {
                if(r->objectName() == name) {
                    if(visible)
                        r->show();
                    else r->hide();
                    break;
                }
            }
        }
    }

    return true;
}

void RollupWidget::setTitleColor(const QColor& c)
{
    m_titleColor = c;
    float l = 0.2126*c.redF() + 0.7152*c.greenF() + 0.0722*c.blueF();
    m_titleTextColor = l < 0.5f ? Qt::white : Qt::black;
    update();
}

void RollupWidget::setHighlighted(bool highlighted)
{
    if (m_highlighted != highlighted)
    {
        m_highlighted = highlighted;
        update();
    }
}

int RollupWidget::arrangeRollups()
{
    QFontMetrics fm(font());
    int pos = fm.height() + 4;

    for(int i = 0; i < children().count(); ++i)
    {
        QWidget* r = qobject_cast<QWidget*>(children()[i]);
        if (r != nullptr)
        {
            pos += fm.height() + 2;

            if (!r->isHidden() && (r->windowTitle() != "Basic channel settings") && (r->windowTitle() != "Select device stream"))
            {
                r->move(2, pos + 3);
                int h = 0;

                if(r->hasHeightForWidth()) {
                    h = r->heightForWidth(width() - 4);
                } else {
                    h = r->sizeHint().height();
                }

                r->resize(width() - 4, h);
                pos += r->height() + 5;
            }
        }
    }

    setMinimumHeight(pos);
    setMaximumHeight(pos);

    return pos;
}

void RollupWidget::paintEvent(QPaintEvent*)
{
    QPainter p(this);
    QColor frame = palette().highlight().color();

    // Eigenbau
    QFontMetrics fm(font());

    p.setRenderHint(QPainter::Antialiasing, true);

    // Ecken
    p.setPen(Qt::NoPen);
    p.setBrush(palette().base());
    p.drawRect(0, 0, 5, 5);
    p.drawRect(width() - 5, 0, 5, 5);
    p.drawRect(0, height() - 5, 5, 5);
    p.drawRect(width() - 5, height() - 5, 5, 5);

    // Rahmen
    p.setPen(m_highlighted ? Qt::white : frame);
    p.setBrush(palette().window());
    QRectF r(rect());
    r.adjust(0.5, 0.5, -0.5, -0.5);
    p.drawRoundedRect(r, 3.0, 3.0, Qt::AbsoluteSize);

    // Titel-Hintergrund
    p.setPen(Qt::NoPen);
    p.setBrush(m_titleColor);
    QPainterPath path;
    path.moveTo(1.5, fm.height() + 2.5);
    path.lineTo(width() - 1.5, fm.height() + 2.5);
    path.lineTo(width() - 1.5, 3.5);
    path.arcTo(QRectF(width() - 3.5, 0, 2.5, 2.5), 270, -90);
    path.lineTo(3.5, 1.5);
    path.arcTo(QRectF(1.5, 2.5, 2.5, 2.5), 90, 90);
    p.drawPath(path);

    // Titel-Abschlusslinie
    p.setPen(frame);
    p.drawLine(QPointF(0.5, 2 + fm.height() + 1.5), QPointF(width() - 1.5, 2 + fm.height() + 1.5));

    // Aktiv-Button links
    p.setPen(QPen(palette().windowText().color(), 1.0));
    p.setBrush(palette().light());
    p.drawRoundedRect(QRectF(3.5, 3.5, fm.ascent(), fm.ascent()), 2.0, 2.0, Qt::AbsoluteSize);
    p.setPen(QPen(Qt::white, 1.0));
    p.drawText(QRectF(3.5, 2.5, fm.ascent(), fm.ascent()),  Qt::AlignCenter, "c");

    // Stromkanal-Button links
    p.setPen(QPen(palette().windowText().color(), 1.0));
    p.setBrush(palette().light());
    p.drawRoundedRect(QRectF(5.5 + fm.ascent(), 2.5, fm.ascent() + 2.0, fm.ascent() + 2.0), 2.0, 2.0, Qt::AbsoluteSize);
    p.setPen(QPen(Qt::white, 1.0));
    p.drawText(QRectF(5.5 + fm.ascent(), 2.5, fm.ascent() + 2.0, fm.ascent() + 2.0),  Qt::AlignCenter, m_streamIndicator);

    // Schließen-Button rechts
    p.setRenderHint(QPainter::Antialiasing, true);
    p.setPen(QPen(palette().windowText().color(), 1.0));
    p.setBrush(palette().light());
    r = QRectF(width() - 3.5 - fm.ascent(), 3.5, fm.ascent(), fm.ascent());
    p.drawRoundedRect(r, 2.0, 2.0, Qt::AbsoluteSize);
    p.setPen(QPen(palette().windowText().color(), 1.5));
    p.drawLine(r.topLeft() + QPointF(1, 1), r.bottomRight() + QPointF(-1, -1));
    p.drawLine(r.bottomLeft() + QPointF(1, -1), r.topRight() + QPointF(-1, 1));

    // Titel
    //p.setPen(palette().highlightedText().color());
    p.setPen(m_titleTextColor);
    p.drawText(QRect(2 + 2*fm.height() + 2, 2, width() - 6 - 3*fm.height(), fm.height()),
        fm.elidedText(windowTitle(), Qt::ElideMiddle, width() - 6 - 3*fm.height(), 0));

    // Rollups
    int pos = fm.height() + 4;

    const QObjectList& c = children();
    QObjectList::ConstIterator w = c.begin();
    QObjectList::ConstIterator n = c.begin();

    for(n = c.begin(); n != c.end(); ++n) {
        if(qobject_cast<QWidget*>(*n) != NULL)
            break;
    }
    for(w = n; w != c.end(); w = n) {
        if(n != c.end())
            ++n;
        for(; n != c.end(); ++n) {
            if(qobject_cast<QWidget*>(*n) != NULL)
                break;
        }
        pos += paintRollup(qobject_cast<QWidget*>(*w), pos, &p, n == c.end(), frame);
    }
}

int RollupWidget::paintRollup(QWidget* rollup, int pos, QPainter* p, bool last, const QColor& frame)
{
    if ((rollup->windowTitle() == "Basic channel settings") || (rollup->windowTitle() == "Select device stream")) {
        return 0;
    }

    QFontMetrics fm(font());
    int height = 1;

    // Titel-Abschlusslinie
    if(!rollup->isHidden()) {
        p->setPen(palette().dark().color());
        p->drawLine(QPointF(1.5, pos + fm.height() + 1.5), QPointF(width() - 1.5, pos + fm.height() + 1.5));
        p->setPen(palette().light().color());
        p->drawLine(QPointF(1.5, pos + fm.height() + 2.5), QPointF(width() - 1.5, pos + fm.height() + 2.5));
        height += 2;
    } else {
        if(!last) {
            p->setPen(frame);
            p->drawLine(QPointF(1.5, pos + fm.height() + 1.5), QPointF(width() - 1.5, pos + fm.height() + 1.5));
            height++;
        }
    }

    // Titel
    p->setPen(palette().windowText().color());
    p->drawText(QRect(2 + fm.height(), pos, width() - 4 - fm.height(), fm.height()),
        fm.elidedText(rollup->windowTitle(), Qt::ElideMiddle, width() - 4 - fm.height(), 0));
    height += fm.height();

    // Ausklapp-Icon
    p->setPen(palette().windowText().color());
    p->setBrush(palette().windowText());
    if(!rollup->isHidden()) {
        QPolygonF a;
        a.append(QPointF(3.5, pos + 2));
        a.append(QPointF(3.5 + fm.ascent(), pos + 2));
        a.append(QPointF(3.5 + fm.ascent() / 2.0, pos + fm.height() - 2));
        p->drawPolygon(a);
    } else {
        QPolygonF a;
        a.append(QPointF(3.5, pos + 2));
        a.append(QPointF(3.5, pos + fm.height() - 2));
        a.append(QPointF(3.5 + fm.ascent(), pos + fm.height() / 2));
        p->drawPolygon(a);
    }

    // Inhalt
    if(!rollup->isHidden() && (!last)) {
        // Rollup-Abschlusslinie
        p->setPen(frame);
        p->drawLine(QPointF(1.5, pos + fm.height() + rollup->height() + 6.5),
                    QPointF(width() - 1.5, pos + fm.height() + rollup->height() + 6.5));
        height += rollup->height() + 4;
    }

    return height;
}

void RollupWidget::resizeEvent(QResizeEvent* size)
{
    arrangeRollups();
    QWidget::resizeEvent(size);
}

void RollupWidget::mousePressEvent(QMouseEvent* event)
{
    QFontMetrics fm(font());

    // menu box left
    if (QRectF(3.5, 3.5, fm.ascent(), fm.ascent()).contains(event->pos()))
    {
        m_contextMenuType = ContextMenuChannelSettings;
        emit customContextMenuRequested(event->globalPos());
        return;
    }

    // Stream channel menu left
    if (QRectF(5.5 + fm.ascent(), 2.5, fm.ascent() + 2.0, fm.ascent() + 2.0).contains(event->pos()))
    {
        m_contextMenuType = ContextMenuStreamSettings;
        emit customContextMenuRequested(event->globalPos());
        return;
    }

    // close button right
    if(QRectF(width() - 3.5 - fm.ascent(), 3.5, fm.ascent(), fm.ascent()).contains(event->pos())) {
        close();
        return;
    }

    // check if we need to change a rollup widget
    int pos = fm.height() + 4;
    for(int i = 0; i < children().count(); ++i) {
        QWidget* r = qobject_cast<QWidget*>(children()[i]);
        if(r != NULL) {
            if((event->y() >= pos) && (event->y() < (pos + fm.height() + 3))) {
                if(r->isHidden()) {
                    r->show();
                    //emit widgetRolled(r, true);
                } else {
                    r->hide();
                    //emit widgetRolled(r, false);
                }
                arrangeRollups();
                repaint();
                return;
            } else {
                pos += fm.height() + 2;
                if(!r->isHidden())
                    pos += r->height() + 5;
            }
        }
    }
}

bool RollupWidget::event(QEvent* event)
{
    if(event->type() == QEvent::ChildAdded) {
        ((QChildEvent*)event)->child()->installEventFilter(this);
        arrangeRollups();
    } else if(event->type() == QEvent::ChildRemoved) {
        ((QChildEvent*)event)->child()->removeEventFilter(this);
        arrangeRollups();
    }
    return QWidget::event(event);
}

bool RollupWidget::eventFilter(QObject* object, QEvent* event)
{
    if(event->type() == QEvent::Show) {
        if(children().contains(object)) {
            arrangeRollups();
            emit widgetRolled(qobject_cast<QWidget*>(object), true);
        }
    } else if(event->type() == QEvent::Hide) {
        if(children().contains(object)) {
            arrangeRollups();
            emit widgetRolled(qobject_cast<QWidget*>(object), false);
        }
    } else if(event->type() == QEvent::WindowTitleChange) {
        if(children().contains(object))
            repaint();
    }
    return QWidget::eventFilter(object, event);
}

void RollupWidget::setStreamIndicator(const QString& indicator)
{
    m_streamIndicator = indicator;
    update();
}