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

   1 #include "lrameter.h"
   2
   3 #include <QPainter>
   4 #include <QPalette>
   5 #include <QPen>
   6 #include "vu_common.h"
   7
   8 class QPaintEvent;
   9
  10 using namespace std;
  11
  12 LRAMeter::LRAMeter(QWidget *parent)
  13         : QWidget(parent)
  14 {
  15 }
  16
  17 void LRAMeter::paintEvent(QPaintEvent *event)
  18 {
  19         QPainter painter(this);
  20
  21         painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
  22
  23         float level_lufs;
  24         float range_low_lufs;
  25         float range_high_lufs;
  26         {
  27                 unique_lock<mutex> lock(level_mutex);
  28                 level_lufs = this->level_lufs;
  29                 range_low_lufs = this->range_low_lufs;
  30                 range_high_lufs = this->range_high_lufs;
  31         }
  32
  33         float level_lu = level_lufs + 23.0f;
  34         float range_low_lu = range_low_lufs + 23.0f;
  35         float range_high_lu = range_high_lufs + 23.0f;
  36         const int margin = 5;
  37         draw_vu_meter(painter, range_low_lu, range_high_lu, width(), height(), margin);
  38
  39         // Draw the target area (+/-1 LU is allowed EBU range).
  40         // It turns green when we're within.
  41         int min_y = lufs_to_pos(1.0f, height());
  42         int max_y = lufs_to_pos(-1.0f, height());
  43
  44         // FIXME: This outlining isn't so pretty.
  45         {
  46                 QPen pen(Qt::black);
  47                 pen.setWidth(5);
  48                 painter.setPen(pen);
  49                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  50         }
  51         {
  52                 QPen pen;
  53                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  54                         pen.setColor(Qt::green);
  55                 } else {
  56                         pen.setColor(Qt::red);
  57                 }
  58                 pen.setWidth(3);
  59                 painter.setPen(pen);
  60                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  61         }
  62
  63         // Draw the integrated loudness meter, in the same color as the target area.
  64         int y = lufs_to_pos(level_lu, height());
  65         {
  66                 QPen pen(Qt::black);
  67                 pen.setWidth(5);
  68                 painter.setPen(pen);
  69                 painter.drawRect(2, y, width() - 5, 1);
  70         }
  71         {
  72                 QPen pen;
  73                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  74                         pen.setColor(Qt::green);
  75                 } else {
  76                         pen.setColor(Qt::red);
  77                 }
  78                 pen.setWidth(3);
  79                 painter.setPen(pen);
  80                 painter.drawRect(2, y, width() - 5, 1);
  81         }
  82 }