ProgressBarAttribute class

The following example shows how ProgressBar can be used.

public class ProgressBarExample : MonoBehaviour
{
	// Default progress bar.
	[ProgressBar(0, 100)]
	public int ProgressBar;

	// Health bar.
	[ProgressBar(0, 100, ColorMember = "GetHealthBarColor")]
	public float HealthBar = 50;

	private Color GetHealthBarColor(float value)
	{
		// Blends between red, and yellow color for when the health is below 30,
		// and blends between yellow and green color for when the health is above 30.
		return Color.Lerp(Color.Lerp(
			Color.red, Color.yellow, MathUtilities.LinearStep(0f, 30f, value)),
			Color.green, MathUtilities.LinearStep(0f, 100f, value));
	}

	// Stacked health bar.
	// The ProgressBar attribute is placed on property, without a set method, so it can't be edited directly.
	// So instead we have this Range attribute on a float to change the value.
	[Range(0, 300)]
	public float StackedHealth;

	[ProgressBar(0, 100, ColorMember = "GetStackedHealthColor", BackgroundColorMember = "GetStackHealthBackgroundColor")]
	private float StackedHealthProgressBar
	{
		// Loops the stacked health value between 0, and 100.
		get { return this.StackedHealth - 100 * (int)((this.StackedHealth - 1) / 100); }
	}

	private Color GetStackedHealthColor()
	{
		return
			this.StackedHealth > 200 ? Color.cyan :
			this.StackedHealth > 100 ? Color.green :
			Color.red;
	}

	private Color GetStackHealthBackgroundColor()
	{
		return
			this.StackedHealth > 200 ? Color.green :
			this.StackedHealth > 100 ? Color.red :
			new Color(0.16f, 0.16f, 0.16f, 1f);
	}

	// Custom color and height.
	[ProgressBar(-100, 100, r: 1, g: 1, b: 1, Height = 30)]
	public short BigProgressBar = 50;

    // You can also reference members by name to dynamically assign the min and max progress bar values.
    [ProgressBar("DynamicMin", "DynamicMax")]
    public float DynamicProgressBar;

    public float DynamicMin, DynamicMax;
}