12 LRAMeter::LRAMeter(QWidget *parent)
17 void LRAMeter::resizeEvent(QResizeEvent *event)
19 recalculate_pixmaps();
22 void LRAMeter::paintEvent(QPaintEvent *event)
24 QPainter painter(this);
28 float range_high_lufs;
30 unique_lock<mutex> lock(level_mutex);
31 level_lufs = this->level_lufs;
32 range_low_lufs = this->range_low_lufs;
33 range_high_lufs = this->range_high_lufs;
36 float level_lu = level_lufs - ref_level_lufs;
37 float range_low_lu = range_low_lufs - ref_level_lufs;
38 float range_high_lu = range_high_lufs - ref_level_lufs;
39 int range_low_pos = lrint(lufs_to_pos(range_low_lu, height()));
40 int range_high_pos = lrint(lufs_to_pos(range_high_lu, height()));
42 QRect top_off_rect(0, 0, width(), range_high_pos);
43 QRect on_rect(0, range_high_pos, width(), range_low_pos - range_high_pos);
44 QRect bottom_off_rect(0, range_low_pos, width(), height() - range_low_pos);
46 painter.drawPixmap(top_off_rect, off_pixmap, top_off_rect);
47 painter.drawPixmap(on_rect, on_pixmap, on_rect);
48 painter.drawPixmap(bottom_off_rect, off_pixmap, bottom_off_rect);
50 // Draw the target area (+/-1 LU is allowed EBU range).
51 // It turns green when we're within.
52 int min_y = lrint(lufs_to_pos(1.0f, height()));
53 int max_y = lrint(lufs_to_pos(-1.0f, height()));
55 // FIXME: This outlining isn't so pretty.
60 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
64 if (level_lu >= -1.0f && level_lu <= 1.0f) {
65 pen.setColor(Qt::green);
67 pen.setColor(Qt::red);
71 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
74 // Draw the integrated loudness meter, in the same color as the target area.
75 int y = lrint(lufs_to_pos(level_lu, height()));
80 painter.drawRect(2, y, width() - 5, 1);
84 if (level_lu >= -1.0f && level_lu <= 1.0f) {
85 pen.setColor(Qt::green);
87 pen.setColor(Qt::red);
91 painter.drawRect(2, y, width() - 5, 1);
95 void LRAMeter::recalculate_pixmaps()
99 on_pixmap = QPixmap(width(), height());
100 QPainter on_painter(&on_pixmap);
101 on_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
102 draw_vu_meter(on_painter, width(), height(), margin, 2.0, true, min_level, max_level, /*flip=*/false);
104 off_pixmap = QPixmap(width(), height());
105 QPainter off_painter(&off_pixmap);
106 off_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
107 draw_vu_meter(off_painter, width(), height(), margin, 2.0, false, min_level, max_level, /*flip=*/false);