Badge.cpp

// SPDX-FileCopyrightText: 2021 Nheko Contributors
//
// SPDX-License-Identifier: GPL-3.0-or-later

#include <QPainter>

#include "Badge.h"

Badge::Badge(QWidget *parent)
  : OverlayWidget(parent)
{
    init();
}

Badge::Badge(const QIcon &icon, QWidget *parent)
  : OverlayWidget(parent)
{
    init();
    setIcon(icon);
}

Badge::Badge(const QString &text, QWidget *parent)
  : OverlayWidget(parent)
{
    init();
    setText(text);
}

void
Badge::init()
{
    x_ = 0;
    y_ = 0;
    // TODO: Make padding configurable.
    padding_  = 5;
    diameter_ = 24;

    setAttribute(Qt::WA_TransparentForMouseEvents);

    QFont _font(font());
    _font.setPointSizeF(7.5);
    _font.setStyleName("Bold");

    setFont(_font);
    setText("");
}

QString
Badge::text() const
{
    return text_;
}

QIcon
Badge::icon() const
{
    return icon_;
}

QSize
Badge::sizeHint() const
{
    const int d = diameter();
    return QSize(d + 4, d + 4);
}

qreal
Badge::relativeYPosition() const
{
    return y_;
}

qreal
Badge::relativeXPosition() const
{
    return x_;
}

QPointF
Badge::relativePosition() const
{
    return QPointF(x_, y_);
}

QColor
Badge::backgroundColor() const
{
    if (!background_color_.isValid())
        return QColor("black");

    return background_color_;
}

QColor
Badge::textColor() const
{
    if (!text_color_.isValid())
        return QColor("white");

    return text_color_;
}

void
Badge::setTextColor(const QColor &color)
{
    text_color_ = color;
}

void
Badge::setBackgroundColor(const QColor &color)
{
    background_color_ = color;
}

void
Badge::setRelativePosition(const QPointF &pos)
{
    setRelativePosition(pos.x(), pos.y());
}

void
Badge::setRelativePosition(qreal x, qreal y)
{
    x_ = x;
    y_ = y;
    update();
}

void
Badge::setRelativeXPosition(qreal x)
{
    x_ = x;
    update();
}

void
Badge::setRelativeYPosition(qreal y)
{
    y_ = y;
    update();
}

void
Badge::setIcon(const QIcon &icon)
{
    icon_ = icon;
    update();
}

void
Badge::setText(const QString &text)
{
    text_ = text;

    if (!icon_.isNull())
        icon_ = QIcon();

    size_ = fontMetrics().size(Qt::TextShowMnemonic, text);

    update();
}

void
Badge::setDiameter(int diameter)
{
    if (diameter > 0) {
        diameter_ = diameter;
        update();
    }
}

void
Badge::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.translate(x_, y_);

    QBrush brush;
    brush.setStyle(Qt::SolidPattern);

    painter.setBrush(brush);
    painter.setPen(Qt::NoPen);

    const int d = diameter();

    QRectF r(0, 0, d, d);
    r.translate(QPointF((width() - d), (height() - d)) / 2);

    if (icon_.isNull()) {
        QPen pen;
        // TODO: Make badge width configurable.
        pen.setWidth(1);
        pen.setColor(textColor());

        painter.setPen(pen);
        painter.drawEllipse(r);

        painter.setPen(textColor());
        painter.setBrush(Qt::NoBrush);
        painter.drawText(r.translated(0, -0.5), Qt::AlignCenter, text_);
    } else {
        painter.drawEllipse(r);
        QRectF q(0, 0, 16, 16);
        q.moveCenter(r.center());
        QPixmap pixmap = icon().pixmap(16, 16);
        QPainter icon(&pixmap);
        icon.setCompositionMode(QPainter::CompositionMode_SourceIn);
        icon.fillRect(pixmap.rect(), textColor());
        painter.drawPixmap(q.toRect(), pixmap);
    }
}

int
Badge::diameter() const
{
    if (icon_.isNull()) {
        return qMax(size_.width(), size_.height()) + padding_;
    }

    return diameter_;
}