Display semi major axis value in red if out of slider range (capped)

src/pulsatingscience.cpp

@@ -52,7 +52,6 @@ PulsatingScience::PulsatingScience(QWidget *parent) : QMainWindow(parent)
 	on_sliderPulsarSpinFrequency_valueChanged(ui.sliderPulsarSpinFrequency->value());
 	on_sliderPulsarSpinAxisInclination_valueChanged(ui.sliderPulsarSpinAxisInclination->value());
 	on_sliderPulsarMagneticAxisInclination_valueChanged(ui.sliderPulsarMagneticAxisInclination->value());
-
 }
 
 PulsatingScience::~PulsatingScience()
@@ -140,6 +139,7 @@ void PulsatingScience::on_sliderPulsarSemiMajorAxis_valueChanged(int value)
 {
 	ui.pulsarGlWidget->setPulsarSemiMajorAxis(value * 0.001f);
 	ui.lcdPulsarSemiMajorAxis->display(QString::number(value * 0.001f, 'f', 1));
+	ui.lcdPulsarSemiMajorAxis->setStyleSheet("color: black");
 }
 
 void PulsatingScience::on_actionMenu_bar_toggled(bool checked)
@@ -165,4 +165,9 @@ void PulsatingScience::on_actionAbout_activated()
 void PulsatingScience::updatePulsarSemiMajorAxisValue(double value)
 {
 	ui.sliderPulsarSemiMajorAxis->setValue(value * 1000.0);
+
+	if(value < 1.0 || value > 20.0) {
+		ui.lcdPulsarSemiMajorAxis->setStyleSheet("color: red");
+		ui.lcdPulsarSemiMajorAxis->display(QString::number(value, 'f', 1));
+	}
 }