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::resizeEvent(QResizeEvent *event)
  18 {
  19         const int margin = 5;
  20
  21         on_pixmap = QPixmap(width(), height());
  22         QPainter on_painter(&on_pixmap);
  23         on_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
  24         draw_vu_meter(on_painter, width(), height(), margin, true);
  25
  26         off_pixmap = QPixmap(width(), height());
  27         QPainter off_painter(&off_pixmap);
  28         off_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
  29         draw_vu_meter(off_painter, width(), height(), margin, false);
  30 }
  31
  32 void LRAMeter::paintEvent(QPaintEvent *event)
  33 {
  34         QPainter painter(this);
  35
  36         float level_lufs;
  37         float range_low_lufs;
  38         float range_high_lufs;
  39         {
  40                 unique_lock<mutex> lock(level_mutex);
  41                 level_lufs = this->level_lufs;
  42                 range_low_lufs = this->range_low_lufs;
  43                 range_high_lufs = this->range_high_lufs;
  44         }
  45
  46         float level_lu = level_lufs + 23.0f;
  47         float range_low_lu = range_low_lufs + 23.0f;
  48         float range_high_lu = range_high_lufs + 23.0f;
  49         int range_low_pos = lrint(lufs_to_pos(range_low_lu, height()));
  50         int range_high_pos = lrint(lufs_to_pos(range_high_lu, height()));
  51
  52         QRect top_off_rect(0, 0, width(), range_high_pos);
  53         QRect on_rect(0, range_high_pos, width(), range_low_pos - range_high_pos);
  54         QRect bottom_off_rect(0, range_low_pos, width(), height() - range_low_pos);
  55
  56         painter.drawPixmap(top_off_rect, off_pixmap, top_off_rect);
  57         painter.drawPixmap(on_rect, on_pixmap, on_rect);
  58         painter.drawPixmap(bottom_off_rect, off_pixmap, bottom_off_rect);
  59
  60         // Draw the target area (+/-1 LU is allowed EBU range).
  61         // It turns green when we're within.
  62         int min_y = lrint(lufs_to_pos(1.0f, height()));
  63         int max_y = lrint(lufs_to_pos(-1.0f, height()));
  64
  65         // FIXME: This outlining isn't so pretty.
  66         {
  67                 QPen pen(Qt::black);
  68                 pen.setWidth(5);
  69                 painter.setPen(pen);
  70                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  71         }
  72         {
  73                 QPen pen;
  74                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  75                         pen.setColor(Qt::green);
  76                 } else {
  77                         pen.setColor(Qt::red);
  78                 }
  79                 pen.setWidth(3);
  80                 painter.setPen(pen);
  81                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  82         }
  83
  84         // Draw the integrated loudness meter, in the same color as the target area.
  85         int y = lrint(lufs_to_pos(level_lu, height()));
  86         {
  87                 QPen pen(Qt::black);
  88                 pen.setWidth(5);
  89                 painter.setPen(pen);
  90                 painter.drawRect(2, y, width() - 5, 1);
  91         }
  92         {
  93                 QPen pen;
  94                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  95                         pen.setColor(Qt::green);
  96                 } else {
  97                         pen.setColor(Qt::red);
  98                 }
  99                 pen.setWidth(3);
 100                 painter.setPen(pen);
 101                 painter.drawRect(2, y, width() - 5, 1);
 102         }
 103 }