private static QImage makeShade(QImage image, boolean highlight, boolean darker) {
double shade_alpha = 0.8;
double shade_size = 0.2;
double hl_pos = GOLDEN_MEAN;
QColor shade_color = QColor.fromRgbF(0, 0, 0, shade_alpha);
QColor transparent = darker ? QColor.fromRgbF(0, 0, 0, 0.25) : QColor.fromRgbF(0, 0, 0, 0);
QColor hl_color = QColor.fromRgbF(1, 1, 1, 0.7);
image = image.copy();
QPainter p = new QPainter();
p.begin(image);
p.scale(image.width(), image.height());
QLinearGradient lg = new QLinearGradient(0, 0, 1, 0);
lg.setColorAt(0, shade_color);
lg.setColorAt(shade_size, transparent);
if (highlight) lg.setColorAt(hl_pos, hl_color);
lg.setColorAt(1 - shade_size, transparent);
lg.setColorAt(1, shade_color);
p.fillRect(0, 0, 1, 1, new QBrush(lg));
if (highlight) {
QRadialGradient rg = new QRadialGradient(hl_pos, 1 - hl_pos, 0.4, hl_pos, 1 - hl_pos);
rg.setColorAt(0, hl_color);
rg.setColorAt(1, transparent);
p.fillRect(0, 0, 1, 1, new QBrush(rg));
}
p.end();
return image;
}
@Override
protected void paintEvent(QPaintEvent e) {
m_smoke_effect.next();
QPainter p = new QPainter();
p.begin(this);
p.fillRect(rect(), new QBrush(QColor.white));
// p.fillRect(rect(), new QBrush(Qt.CrossPattern));
p.drawImage(50, 80, m_logo);
p.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform);
QImage im = m_smoke_effect.image();
p.drawImage(
new QRect(50, -20, im.width(), im.height()),
im,
new QRect(0, (int) (im.height() * 0.60), im.width(), (int) (im.height() * 0.39)));
p.end();
}