private void drawSteeringWheel(Graphics g, int panelWidth, int panelHeight) {
// outer circle
int x = panelWidth / 2 - WheelRadius;
int y = panelHeight / 2 - WheelRadius;
Color defaultColor = this.getBackground();
g.setColor(Color.LIGHT_GRAY);
g.fillOval(x, y, WheelRadius * 2, WheelRadius * 2);
// inner circle
int innerWheelRadius = (int) (WheelRadius * InnerWheelRatio);
x = panelWidth / 2 - innerWheelRadius;
y = panelHeight / 2 - innerWheelRadius;
g.setColor(defaultColor);
g.fillOval(x, y, innerWheelRadius * 2, innerWheelRadius * 2);
double steeringWheelRotation = in.getSteeringWheelSignedPercentage();
// drawing the 'needle'
{
double needleRadius = (WheelRadius - innerWheelRadius) / 2;
double needleRotation = (steeringWheelRotation * WheelMovementScaleRatio - 90);
double needleLength = innerWheelRadius + needleRadius;
x =
(int)
(panelWidth / 2
- needleRadius
+ Math.cos(Math.toRadians(needleRotation)) * needleLength);
y =
(int)
(panelHeight / 2
- needleRadius
+ Math.sin(Math.toRadians(needleRotation)) * needleLength);
g.setColor(Color.DARK_GRAY);
g.fillOval(x, y, (int) needleRadius * 2, (int) needleRadius * 2);
}
// drawing the value in text
x = panelWidth / 2 - g.getFontMetrics().stringWidth(steeringWheelRotation + "%") / 2;
y = panelHeight / 2;
g.setColor(Color.BLACK);
g.drawString(steeringWheelRotation + "%", x, y);
}
