2 files changed, 26 insertions, 21 deletions

diff --git a/tracker-pt/pt_video_widget.cpp b/tracker-pt/pt_video_widget.cpp
index 99f86eb2..38d7a5e8 100644
--- a/tracker-pt/pt_video_widget.cpp
+++ b/tracker-pt/pt_video_widget.cpp
@@ -1,20 +1,28 @@
 /* Copyright (c) 2012 Patrick Ruoff
- * Copyright (c) 2015 Stanislaw Halik <sthalik@misaki.pl>
+ * Copyright (c) 2014-2016 Stanislaw Halik <sthalik@misaki.pl>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
- *
- * 20130312, WVR: Add 7 lines to resizeGL after resize_frame. This should lower CPU-load.
  */
 
 #include "pt_video_widget.h"
 #include <opencv2/imgproc.hpp>
 
+#include "opentrack/is-window-visible.hpp"
+
+PTVideoWidget::PTVideoWidget(QWidget* parent) :
+    QWidget(parent),
+    freshp(false)
+{
+    connect(&timer, SIGNAL(timeout()), this, SLOT(update_and_repaint()));
+    timer.start(50);
+}
+
 void PTVideoWidget::update_image(const cv::Mat& frame)
 {
     QMutexLocker foo(&mtx);
-    
+
     if (!freshp)
     {
         if (_frame.cols != frame.cols || _frame.rows != frame.rows)
@@ -27,20 +35,27 @@ void PTVideoWidget::update_image(const cv::Mat& frame)
     }
 }
 
+void PTVideoWidget::paintEvent(QPaintEvent* e)
+{
+    QMutexLocker foo(&mtx);
+    QPainter painter(this);
+    painter.drawImage(e->rect(), texture);
+}
+
 void PTVideoWidget::update_and_repaint()
 {
-    if (static_cast<QWidget*>(parent())->isEnabled())
+    if (is_window_visible(this))
     {
         QMutexLocker foo(&mtx);
         if (_frame.empty() || !freshp)
             return;
         cv::cvtColor(_frame, _frame2, cv::COLOR_RGB2BGR);
-        
+
         if (_frame3.cols != width() || _frame3.rows != height())
             _frame3 = cv::Mat(height(), width(), CV_8U);
 
         cv::resize(_frame2, _frame3, cv::Size(width(), height()), 0, 0, cv::INTER_NEAREST);
-        
+
         texture = QImage((const unsigned char*) _frame3.data, _frame3.cols, _frame3.rows, QImage::Format_RGB888);
         freshp = false;
         update();
diff --git a/tracker-pt/pt_video_widget.h b/tracker-pt/pt_video_widget.h
index d9144ac0..c2957876 100644
--- a/tracker-pt/pt_video_widget.h
+++ b/tracker-pt/pt_video_widget.h
@@ -1,5 +1,5 @@
 /* Copyright (c) 2012 Patrick Ruoff
- * Copyright (c) 2014 Stanislaw Halik <sthalik@misaki.pl>
+ * Copyright (c) 2014-2016 Stanislaw Halik <sthalik@misaki.pl>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -19,25 +19,15 @@
 #include <QMutexLocker>
 #include <QDebug>
 
-class PTVideoWidget : public QWidget
+class PTVideoWidget final : public QWidget
 {
     Q_OBJECT
 
 public:
-    PTVideoWidget(QWidget *parent) :
-        QWidget(parent),
-        freshp(false)
-    {
-        connect(&timer, SIGNAL(timeout()), this, SLOT(update_and_repaint()));
-        timer.start(50);
-    }
+    PTVideoWidget(QWidget *parent);
     void update_image(const cv::Mat &frame);
 protected slots:
-    void paintEvent( QPaintEvent* e ) {
-        QMutexLocker foo(&mtx);
-        QPainter painter(this);
-        painter.drawImage(e->rect(), texture);
-    }
+    void paintEvent(QPaintEvent* e) override;
     void update_and_repaint();
 private:
     QMutex mtx;