Add null checks for timebase in TimeScaledObject and fix background color assignment in ViewerDisplayWidget

CMakeLists.txt

@@ -107,6 +107,7 @@ list(APPEND OLIVE_INCLUDE_DIRS ${OPENEXR_INCLUDES})
 list(APPEND OLIVE_LIBRARIES olivecore)
 list(APPEND OLIVE_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/ext/core/include)
 
+
 # Link Qt
 set(QT_LIBRARIES
   Core

app/widget/timebased/timescaledobject.cpp

@@ -58,6 +58,9 @@ const double &TimeScaledObject::timebase_dbl() const
 rational TimeScaledObject::SceneToTime(const double &x, const double &x_scale,
 									   const rational &timebase, bool round)
 {
+	if (timebase.isNull()) {
+		return rational();
+	}
 	double unscaled_time = x / x_scale / timebase.toDouble();
 
 	// Adjust screen point by scale and timebase
@@ -87,16 +90,25 @@ rational TimeScaledObject::SceneToTimeNoGrid(const double &x,
 
 double TimeScaledObject::TimeToScene(const rational &time) const
 {
+	if (timebase_.isNull()) {
+		return 0.0;
+	}
 	return time.toDouble() * scale_;
 }
 
 rational TimeScaledObject::SceneToTime(const double &x, bool round) const
 {
+	if (timebase_.isNull()) {
+		return rational();
+	}
 	return SceneToTime(x, scale_, timebase_, round);
 }
 
 rational TimeScaledObject::SceneToTimeNoGrid(const double &x) const
 {
+	if (timebase_.isNull()) {
+		return rational::fromDouble(x / scale_);
+	}
 	return SceneToTimeNoGrid(x, scale_);
 }
 

app/widget/viewer/viewerdisplay.cpp

@@ -374,7 +374,7 @@ bool ViewerDisplayWidget::eventFilter(QObject *o, QEvent *e)
 void ViewerDisplayWidget::OnPaint()
 {
 	// Clear background to empty
-	QColor bg_color = show_widget_background_ ? palette().window().color() :
+ 	QColor bg_color = show_widget_background_ ? palette().window().color() :
 												Qt::black;
 	renderer()->ClearDestination(nullptr, bg_color.redF(), bg_color.greenF(),
 								 bg_color.blueF());