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

   1 #include <QPainter>
   2
   3 #include "vumeter.h"
   4 #include "vu_common.h"
   5
   6 using namespace std;
   7
   8 VUMeter::VUMeter(QWidget *parent)
   9         : QWidget(parent)
  10 {
  11 }
  12
  13 void VUMeter::resizeEvent(QResizeEvent *event)
  14 {
  15         on_pixmap = QPixmap(width(), height());
  16         QPainter on_painter(&on_pixmap);
  17         draw_vu_meter(on_painter, width(), height(), 0, true);
  18
  19         off_pixmap = QPixmap(width(), height());
  20         QPainter off_painter(&off_pixmap);
  21         draw_vu_meter(off_painter, width(), height(), 0, false);
  22 }
  23
  24 void VUMeter::paintEvent(QPaintEvent *event)
  25 {
  26         QPainter painter(this);
  27
  28         float level_lufs;
  29         {
  30                 unique_lock<mutex> lock(level_mutex);
  31                 level_lufs = this->level_lufs;
  32         }
  33
  34         float level_lu = level_lufs + 23.0f;
  35         int on_pos = lrint(lufs_to_pos(level_lu, height()));
  36         QRect off_rect(0, 0, width(), on_pos);
  37         QRect on_rect(0, on_pos, width(), height() - on_pos);
  38
  39         painter.drawPixmap(off_rect, off_pixmap, off_rect);
  40         painter.drawPixmap(on_rect, on_pixmap, on_rect);
  41 }