Key Input Handler

package halocraft;

import org.lwjgl.opengl.GL11;

import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Gui;
import net.minecraft.client.gui.ScaledResolution;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.WorldRenderer;
import net.minecraft.util.ChatComponentText;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.common.gameevent.InputEvent;

public class KeyInputHandler extends Gui {
	private Minecraft mc = Minecraft.getMinecraft();
	ResourceLocation brscope = new ResourceLocation("halocraft:textures/gui/BattleRifleScope.png");
	public static boolean keyPressed = false;
    @SubscribeEvent
    public void onKeyInput(InputEvent.KeyInputEvent event) {
        while(KeyBindings.scope.isPressed()){
        	if(mc.thePlayer.getHeldItem() != null){
        		if(mc.thePlayer.getHeldItem().getItem() == halocraft.Main.itemBattleRifle){
        			//Chat Message telling Player Scope is Initialized{Debugging Purpose}
        			mc.thePlayer.addChatMessage(new ChatComponentText("[HaloCraft 2.0] Scope Initialized."));
        			//Rendering Scope
    	    		// Add this block of code before you draw the section of your texture containing transparency
    	    		//Rendering Halo HUD
    	    		ScaledResolution scaled = new ScaledResolution(mc, mc.displayWidth, mc.displayHeight);
    	    		System.out.println("Scaled Width: " + scaled.getScaledWidth());
    	    		System.out.println("Scaled Height: " + scaled.getScaledHeight());
    	    		int xPos = (scaled.getScaledWidth() - 256) / 2;
    	    		int yPos = (scaled.getScaledHeight() - 256) / 2;
    	    		System.out.println("X-Pos " + xPos + " Y-Pos " + yPos);
    	    		this.mc.getTextureManager().bindTexture(brscope);
    	    		// Add this block of code before you draw the section of your texture containing transparency
    	    		GL11.glEnable(GL11.GL_BLEND);
    	    		GL11.glDisable(GL11.GL_DEPTH_TEST);
    	    		GL11.glDepthMask(false);
    	    		GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    	    		GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
    	    		GL11.glDisable(GL11.GL_ALPHA_TEST);
    	    		drawTexturedModalRect(xPos, yPos, 256, 256, 256, 256);
    	    		GL11.glDisable(GL11.GL_BLEND);
    	    		GL11.glEnable(GL11.GL_DEPTH_TEST);
    	    		GL11.glDepthMask(true);

            	}
            	else{
            		mc.thePlayer.addChatMessage(new ChatComponentText("[HaloCraft 2.0] This is not a weapon or does not have a scope."));
            	}
        	}
        	else{
        		mc.thePlayer.addChatMessage(new ChatComponentText("[HaloCraft 2.0] You're not holding anything!"));
        	}
        }
    }

}