void NewsButton::refreshButton()
{
auto &feed = NewsFeed::instance();
auto unreadCount = feed.unreadCount();
if (unreadCount > 0) {
QPixmap numberPixmap(Utils::smallIconSize());
numberPixmap.fill(Qt::transparent);
QPainter painter(&numberPixmap);
painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
painter.setBrush(QColor(250, 92, 92));
painter.setPen(Qt::NoPen);
painter.drawEllipse(numberPixmap.rect().adjusted(1, 1, -1, -1));
auto font = painter.font();
font.setBold(true);
painter.setFont(font);
painter.setBrush(Qt::white);
painter.setPen(Qt::white);
painter.drawText(numberPixmap.rect(), Qt::AlignCenter, QString::number(unreadCount));
setIcon(QIcon(numberPixmap));
} else {
setIcon(QIcon());
}
setEnabled(!feed.isEmpty());
}
//This function makes a pixmap which is based on icon, but has a number painted on it.
QPixmap BoxContainerItem::calcComplexPixmap(const QPixmap &icon, const QColor &fgColour, const QFont *font, const int count)
{
QPixmap result(icon);
QPixmap numberPixmap(icon.size());
QImage iconImage(icon.convertToImage());
QImage numberImage;
QRgb *rgbline;
QPainter p;
//Make a transparent number; first make a white number on a black background.
//This pixmap also is the base alpha-channel, the foreground colour is added later.
numberPixmap.fill(Qt::black);
p.begin(&numberPixmap, false);
p.setPen(Qt::white);
if(font)
p.setFont(*font);
p.drawText(icon.rect(), Qt::AlignCenter, QString::number(count));
p.end();
//Convert to image and add the alpha channel.
numberImage = numberPixmap.convertToImage();
if(numberImage.depth() != 32) //Make sure depth is 32 (and thus can have an alpha channel)
numberImage = numberImage.convertDepth(32);
numberImage.setAlphaBuffer(true); //Enable alpha channel
for(int xx = 0; xx < numberImage.height(); ++xx)
{
rgbline = (QRgb *)numberImage.scanLine(xx);
for(int yy = 0; yy < numberImage.width(); ++yy)
{
//Set colour and alpha channel
rgbline[ yy ] = qRgba(fgColour.red(), fgColour.green(), fgColour.blue(), qRed(rgbline[ yy ]));
}
}
//Merge icon and number and convert to result.
KIconEffect::overlay(iconImage, numberImage);
result.convertFromImage(iconImage);
return result;
}
