8 VUMeter::VUMeter(QWidget *parent)
13 void VUMeter::resizeEvent(QResizeEvent *event)
15 recalculate_pixmaps();
18 void VUMeter::paintEvent(QPaintEvent *event)
20 QPainter painter(this);
24 unique_lock<mutex> lock(level_mutex);
25 level_lufs[0] = this->level_lufs[0];
26 level_lufs[1] = this->level_lufs[1];
29 int mid = width() / 2;
31 for (unsigned channel = 0; channel < 2; ++channel) {
32 int left = (channel == 0) ? 0 : mid;
33 int right = (channel == 0) ? mid : width();
34 float level_lu = level_lufs[channel] - ref_level_lufs;
35 int on_pos = lrint(lufs_to_pos(level_lu, height()));
38 QRect on_rect(left, 0, right, height() - on_pos);
39 QRect off_rect(left, height() - on_pos, right, height());
41 painter.drawPixmap(on_rect, on_pixmap, on_rect);
42 painter.drawPixmap(off_rect, off_pixmap, off_rect);
44 QRect off_rect(left, 0, right, on_pos);
45 QRect on_rect(left, on_pos, right, height() - on_pos);
47 painter.drawPixmap(off_rect, off_pixmap, off_rect);
48 painter.drawPixmap(on_rect, on_pixmap, on_rect);
53 void VUMeter::recalculate_pixmaps()
55 on_pixmap = QPixmap(width(), height());
56 QPainter on_painter(&on_pixmap);
57 draw_vu_meter(on_painter, width(), height(), 0, true, min_level, max_level, flip);
59 off_pixmap = QPixmap(width(), height());
60 QPainter off_painter(&off_pixmap);
61 draw_vu_meter(off_painter, width(), height(), 0, false, min_level, max_level, flip);