src/main/java/mekanism/client/gui/GuiEnergyGauge.java

package mekanism.client.gui;

import mekanism.api.energy.IStrictEnergyStorage;
import mekanism.client.render.MekanismRenderer;
import mekanism.common.util.MekanismUtils;

import net.minecraft.util.IIcon;
import net.minecraft.util.ResourceLocation;

import codechicken.lib.vec.Rectangle4i;

public class GuiEnergyGauge extends GuiGauge
{
	IEnergyInfoHandler infoHandler;

	public GuiEnergyGauge(IEnergyInfoHandler handler, Type type, IGuiWrapper gui, ResourceLocation def, int x, int y)
	{
		super(type, gui, def, x, y);

		infoHandler = handler;
	}
	
	@Override
	public Rectangle4i getBounds(int guiWidth, int guiHeight)
	{
		return new Rectangle4i(guiWidth - 26, guiHeight + 6, 26, 26);
	}

	@Override
	public int getScaledLevel()
	{
		return (int)(infoHandler.getEnergyStorage().getEnergy()*(height-2) / infoHandler.getEnergyStorage().getMaxEnergy());
	}

	@Override
	public IIcon getIcon()
	{
		return MekanismRenderer.energyIcon;
	}

	@Override
	public String getTooltipText()
	{
		return infoHandler.getEnergyStorage().getEnergy() > 0 ? MekanismUtils.getEnergyDisplay(infoHandler.getEnergyStorage().getEnergy()) : MekanismUtils.localize("gui.empty");
	}

	public static interface IEnergyInfoHandler
	{
		public IStrictEnergyStorage getEnergyStorage();
	}
}