3 #include <QPaintDevice>
13 #include "vu_common.h"
20 LRAMeter::LRAMeter(QWidget *parent)
25 void LRAMeter::resizeEvent(QResizeEvent *event)
27 recalculate_pixmaps();
30 void LRAMeter::paintEvent(QPaintEvent *event)
32 QPainter painter(this);
36 float range_high_lufs;
38 lock_guard<mutex> lock(level_mutex);
39 level_lufs = this->level_lufs;
40 range_low_lufs = this->range_low_lufs;
41 range_high_lufs = this->range_high_lufs;
44 float level_lu = level_lufs - ref_level_lufs;
45 float range_low_lu = range_low_lufs - ref_level_lufs;
46 float range_high_lu = range_high_lufs - ref_level_lufs;
47 int range_low_pos = lrint(lufs_to_pos(range_low_lu, height()));
48 int range_high_pos = lrint(lufs_to_pos(range_high_lu, height()));
50 QRect top_off_rect(0, 0, width(), range_high_pos);
51 QRect on_rect(0, range_high_pos, width(), range_low_pos - range_high_pos);
52 QRect bottom_off_rect(0, range_low_pos, width(), height() - range_low_pos);
54 painter.drawPixmap(top_off_rect, off_pixmap, top_off_rect);
55 painter.drawPixmap(on_rect, on_pixmap, on_rect);
56 painter.drawPixmap(bottom_off_rect, off_pixmap, bottom_off_rect);
58 // Draw the target area (+/-1 LU is allowed EBU range).
59 // It turns green when we're within.
60 int min_y = lrint(lufs_to_pos(1.0f, height()));
61 int max_y = lrint(lufs_to_pos(-1.0f, height()));
63 // FIXME: This outlining isn't so pretty.
68 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
72 if (level_lu >= -1.0f && level_lu <= 1.0f) {
73 pen.setColor(Qt::green);
75 pen.setColor(Qt::red);
79 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
82 // Draw the integrated loudness meter, in the same color as the target area.
83 int y = lrint(lufs_to_pos(level_lu, height()));
88 painter.drawRect(2, y, width() - 5, 1);
92 if (level_lu >= -1.0f && level_lu <= 1.0f) {
93 pen.setColor(Qt::green);
95 pen.setColor(Qt::red);
99 painter.drawRect(2, y, width() - 5, 1);
103 void LRAMeter::recalculate_pixmaps()
105 const int margin = 5;
107 on_pixmap = QPixmap(width(), height());
108 QPainter on_painter(&on_pixmap);
109 on_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
110 draw_vu_meter(on_painter, width(), height(), margin, 2.0, true, min_level, max_level, /*flip=*/false);
112 off_pixmap = QPixmap(width(), height());
113 QPainter off_painter(&off_pixmap);
114 off_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
115 draw_vu_meter(off_painter, width(), height(), margin, 2.0, false, min_level, max_level, /*flip=*/false);