SmoothScroll

package svk.industrialTech.gui;

import org.lwjgl.input.Mouse;

import svk.industrialTech.utils.RenderHelper;
import net.minecraft.client.Minecraft;
import net.minecraft.util.ResourceLocation;

public class SmoothScroll
{
    public final ResourceLocation texture = new ResourceLocation("minecraft:textures/gui/container/creative_inventory/tabs.png");
    int posX, posY, sizeY, step;
    float percent, scrollPower;

    public SmoothScroll(int posX, int posY, int sizeY, int scrollPower)
    {
        this.posX = posX;
        this.posY = posY;
        this.sizeY = sizeY;
        this.scrollPower = scrollPower;
    }

    public void draw()
    {
        Minecraft.getMinecraft().getTextureManager().bindTexture(texture);


        if(percent <= 0.1F) RenderHelper.drawTextureCustomSize(posX, posY, 232, 0, 12, 15, 256, 256);
        else if(percent >= 0.9F) RenderHelper.drawTextureCustomSize(posX, posY + sizeY - 15, 232, 0, 12, 15, 256, 256);
        else RenderHelper.drawTextureCustomSize(posX, posY + sizeY * percent - 7.5F, 232, 0, 12, 15, 256, 256);
    }

    public void mouseClickMove(int x, int y, int key, long time)
    {
        if(x >= posX && y >= posY && x <= posX+12 && y <= posY+sizeY)
        {
            this.percent = (float) (y - posY)/sizeY;
            if(percent <= 0.1F) percent = 0;
            if(percent >= 0.9F) percent = 1;
        }
    }

    public void handleMouseInput(int x, int y)
    {
        if(x >= posX && y >= posY && x <= posX+12 && y <= posY+sizeY)
        {
            int scrollType = Mouse.getEventDWheel();
            if(scrollType < 0) //Back
            {
                this.scrollDown();
            }
            else if(scrollType > 0)//Back to the future
            {
                this.scrollUp();
            }
        }
    }

    public void scrollUp()
    {
        if(this.percent > 0) this.percent -= scrollPower;
        }

    public void scrollDown()
    {
        if(this.percent < 1) this.percent += scrollPower;
    }
}