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

   1 #include "jpeg_frame_view.h"
   2
   3 #include "post_to_main_thread.h"
   4
   5 #include <QGraphicsPixmapItem>
   6 #include <QPixmap>
   7
   8 using namespace std;
   9
  10 string filename_for_frame(unsigned stream_idx, int64_t pts);
  11
  12 JPEGFrameView::JPEGFrameView(QWidget *parent)
  13         : QGraphicsView(parent) {
  14         scene.addItem(&item);
  15         setScene(&scene);
  16         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  17         setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  18 }
  19
  20 void JPEGFrameView::update_frame()
  21 {
  22         dirty = true;
  23         post_to_main_thread([this]{
  24                 hide();
  25                 show();
  26         });
  27 }
  28
  29 void JPEGFrameView::resizeEvent(QResizeEvent *event)
  30 {
  31         fitInView(&item, Qt::KeepAspectRatio);
  32 }
  33
  34 void JPEGFrameView::paintEvent(QPaintEvent *event)
  35 {
  36         if (dirty) {
  37                 dirty = false;
  38                 item.setPixmap(QPixmap(QString::fromStdString(filename_for_frame(stream_idx, pts))));
  39                 fitInView(&item, Qt::KeepAspectRatio);
  40         }
  41         QGraphicsView::paintEvent(event);
  42 }