git.sesse.net Git - nageru/blob - lrameter.cpp

   1 #include <QPainter>
   2
   3 #include "lrameter.h"
   4 #include "vu_common.h"
   5
   6 using namespace std;
   7
   8 LRAMeter::LRAMeter(QWidget *parent)
   9         : QWidget(parent)
  10 {
  11 }
  12
  13 void LRAMeter::paintEvent(QPaintEvent *event)
  14 {
  15         QPainter painter(this);
  16
  17         painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
  18
  19         float level_lufs;
  20         float range_low_lufs;
  21         float range_high_lufs;
  22         {
  23                 unique_lock<mutex> lock(level_mutex);
  24                 level_lufs = this->level_lufs;
  25                 range_low_lufs = this->range_low_lufs;
  26                 range_high_lufs = this->range_high_lufs;
  27         }
  28
  29         float level_lu = level_lufs + 23.0f;
  30         float range_low_lu = range_low_lufs + 23.0f;
  31         float range_high_lu = range_high_lufs + 23.0f;
  32         const int margin = 5;
  33         draw_vu_meter(painter, range_low_lu, range_high_lu, width(), height(), margin);
  34
  35         // Draw the target area (+/-1 LU is allowed EBU range).
  36         // It turns green when we're within.
  37         int min_y = lufs_to_pos(1.0f, height());
  38         int max_y = lufs_to_pos(-1.0f, height());
  39
  40         // FIXME: This outlining isn't so pretty.
  41         {
  42                 QPen pen(Qt::black);
  43                 pen.setWidth(5);
  44                 painter.setPen(pen);
  45                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  46         }
  47         {
  48                 QPen pen;
  49                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  50                         pen.setColor(Qt::green);
  51                 } else {
  52                         pen.setColor(Qt::red);
  53                 }
  54                 pen.setWidth(3);
  55                 painter.setPen(pen);
  56                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  57         }
  58
  59         // Draw the integrated loudness meter, in the same color as the target area.
  60         int y = lufs_to_pos(level_lu, height());
  61         {
  62                 QPen pen(Qt::black);
  63                 pen.setWidth(5);
  64                 painter.setPen(pen);
  65                 painter.drawRect(2, y, width() - 5, 1);
  66         }
  67         {
  68                 QPen pen;
  69                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  70                         pen.setColor(Qt::green);
  71                 } else {
  72                         pen.setColor(Qt::red);
  73                 }
  74                 pen.setWidth(3);
  75                 painter.setPen(pen);
  76                 painter.drawRect(2, y, width() - 5, 1);
  77         }
  78 }