drawScreenMethod

 /**
     * Draws the screen and all the components in it.
     */
    public void drawScreen(int mouseX, int mouseY, float partialTicks)
    {
        int i = this.guiLeft;
        int j = this.guiTop;
        this.drawGuiContainerBackgroundLayer(partialTicks, mouseX, mouseY);
        GlStateManager.disableRescaleNormal();
        RenderHelper.disableStandardItemLighting();
        GlStateManager.disableLighting();
        GlStateManager.disableDepth();
        super.drawScreen(mouseX, mouseY, partialTicks);
        RenderHelper.enableGUIStandardItemLighting();
        GlStateManager.pushMatrix();
        GlStateManager.translate((float)i, (float)j, 0.0F);
        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
        GlStateManager.enableRescaleNormal();
        this.hoveredSlot = null;
        int k = 240;
        int l = 240;
        OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 240.0F, 240.0F);
        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);

        for (int i1 = 0; i1 < this.inventorySlots.inventorySlots.size(); ++i1)
        {
            Slot slot = this.inventorySlots.inventorySlots.get(i1);

            if (slot.isEnabled())
            {
                this.drawSlot(slot);
            }

            if (this.isMouseOverSlot(slot, mouseX, mouseY) && slot.isEnabled())
            {
                this.hoveredSlot = slot;
                GlStateManager.disableLighting();
                GlStateManager.disableDepth();
                int j1 = slot.xPos;
                int k1 = slot.yPos;
                GlStateManager.colorMask(true, true, true, false);
                this.drawGradientRect(j1, k1, j1 + 16, k1 + 16, -2130706433, -2130706433);
                GlStateManager.colorMask(true, true, true, true);
                GlStateManager.enableLighting();
                GlStateManager.enableDepth();
            }
        }

        RenderHelper.disableStandardItemLighting();
        this.drawGuiContainerForegroundLayer(mouseX, mouseY);
        RenderHelper.enableGUIStandardItemLighting();
        net.minecraftforge.common.MinecraftForge.EVENT_BUS.post(new net.minecraftforge.client.event.GuiContainerEvent.DrawForeground(this, mouseX, mouseY));
        InventoryPlayer inventoryplayer = this.mc.player.inventory;
        ItemStack itemstack = this.draggedStack.isEmpty() ? inventoryplayer.getItemStack() : this.draggedStack;

        if (!itemstack.isEmpty())
        {
            int j2 = 8;
            int k2 = this.draggedStack.isEmpty() ? 8 : 16;
            String s = null;

            if (!this.draggedStack.isEmpty() && this.isRightMouseClick)
            {
                itemstack = itemstack.copy();
                itemstack.setCount(MathHelper.ceil((float)itemstack.getCount() / 2.0F));
            }
            else if (this.dragSplitting && this.dragSplittingSlots.size() > 1)
            {
                itemstack = itemstack.copy();
                itemstack.setCount(this.dragSplittingRemnant);

                if (itemstack.isEmpty())
                {
                    s = "" + TextFormatting.YELLOW + "0";
                }
            }

            this.drawItemStack(itemstack, mouseX - i - 8, mouseY - j - k2, s);
        }

        if (!this.returningStack.isEmpty())
        {
            float f = (float)(Minecraft.getSystemTime() - this.returningStackTime) / 100.0F;

            if (f >= 1.0F)
            {
                f = 1.0F;
                this.returningStack = ItemStack.EMPTY;
            }

            int l2 = this.returningStackDestSlot.xPos - this.touchUpX;
            int i3 = this.returningStackDestSlot.yPos - this.touchUpY;
            int l1 = this.touchUpX + (int)((float)l2 * f);
            int i2 = this.touchUpY + (int)((float)i3 * f);
            this.drawItemStack(this.returningStack, l1, i2, (String)null);
        }

        GlStateManager.popMatrix();
        GlStateManager.enableLighting();
        GlStateManager.enableDepth();
        RenderHelper.enableStandardItemLighting();
    }