public void drawScreen(int par1, int par2, float par3)
    {
        this.mouseX = par1;
        this.mouseY = par2;
        this.drawBackground();
        int var4 = this.getSize();
        int var5 = this.getScrollBarX();
        int var6 = var5 + 6;
        int var9;
        int var10;
        int var11;
        int var13;
        int var19;

        if (Mouse.isButtonDown(0))
        {
            if (this.initialClickY == -1.0F)
            {
                boolean var7 = true;

                if (par2 >= this.top && par2 <= this.bottom)
                {
                    int var8 = this.width / 2 - slotSizeHalf;
                    var9 = this.width / 2 + slotSizeHalf;
                    var10 = par2 - this.top - this.field_77242_t + (int)this.amountScrolled - 4;
                    var11 = var10 / this.slotHeight;

                    if (par1 >= var8 && par1 <= var9 && var11 >= 0 && var10 >= 0 && var11 < var4)
                    {
                        boolean var12 = var11 == this.selectedElement && Minecraft.getSystemTime() - this.lastClicked < 250L;
                        this.elementClicked(var11, var12);
                        this.selectedElement = var11;
                        this.lastClicked = Minecraft.getSystemTime();
                    }
                    else if (par1 >= var8 && par1 <= var9 && var10 < 0)
                    {
                        this.func_77224_a(par1 - var8, par2 - this.top + (int)this.amountScrolled - 4);
                        var7 = false;
                    }

                    if (par1 >= var5 && par1 <= var6)
                    {
                        this.scrollMultiplier = -1.0F;
                        var19 = this.func_77209_d();

                        if (var19 < 1)
                        {
                            var19 = 1;
                        }

                        var13 = (int)((float)((this.bottom - this.top) * (this.bottom - this.top)) / (float)this.getContentHeight());

                        if (var13 < 32)
                        {
                            var13 = 32;
                        }

                        if (var13 > this.bottom - this.top - 8)
                        {
                            var13 = this.bottom - this.top - 8;
                        }

                        this.scrollMultiplier /= (float)(this.bottom - this.top - var13) / (float)var19;
                    }
                    else
                    {
                        this.scrollMultiplier = 1.0F;
                    }

                    if (var7)
                    {
                        this.initialClickY = (float)par2;
                    }
                    else
                    {
                        this.initialClickY = -2.0F;
                    }
                }
                else
                {
                    this.initialClickY = -2.0F;
                }
            }
            else if (this.initialClickY >= 0.0F)
            {
                this.amountScrolled -= ((float)par2 - this.initialClickY) * this.scrollMultiplier;
                this.initialClickY = (float)par2;
            }
        }
        else
        {
            while (Mouse.next())
            {
                int var16 = Mouse.getEventDWheel();

                if (var16 != 0)
                {
                    if (var16 > 0)
                    {
                        var16 = -1;
                    }
                    else if (var16 < 0)
                    {
                        var16 = 1;
                    }

                    this.amountScrolled += (float)(var16 * this.slotHeight / 2);
                }
            }

            this.initialClickY = -1.0F;
        }

        this.bindAmountScrolled();
        GL11.glDisable(GL11.GL_LIGHTING);
        GL11.glDisable(GL11.GL_FOG);
        Tessellator var18 = Tessellator.instance;
        drawContainerBackgroundFull(var18);
        var9 = this.width / 2 - slotSizeHalf - 0;
        var10 = this.top + 4 - (int)this.amountScrolled;

        if (this.field_77243_s)
        {
            this.func_77222_a(var9, var10, var18);
        }

        int var14;

        for (var11 = 0; var11 < var4; ++var11)
        {
            var19 = var10 + var11 * this.slotHeight + this.field_77242_t;
            var13 = this.slotHeight - 4;

            if (var19 <= this.bottom && var19 + var13 >= this.top)
            {
                if (this.showSelectionBox && this.isSelected(var11))
                {
                    var14 = this.width / 2 - slotSizeHalf;
                    int var15 = this.width / 2 + slotSizeHalf;
                    GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
                    GL11.glDisable(GL11.GL_TEXTURE_2D);
                    var18.startDrawingQuads();
                    var18.setColorOpaque_I(8421504);
                    var18.addVertexWithUV((double)var14, (double)(var19 + var13 + 2), 0.0D, 0.0D, 1.0D);
                    var18.addVertexWithUV((double)var15, (double)(var19 + var13 + 2), 0.0D, 1.0D, 1.0D);
                    var18.addVertexWithUV((double)var15, (double)(var19 - 2), 0.0D, 1.0D, 0.0D);
                    var18.addVertexWithUV((double)var14, (double)(var19 - 2), 0.0D, 0.0D, 0.0D);
                    var18.setColorOpaque_I(0);
                    var18.addVertexWithUV((double)(var14 + 1), (double)(var19 + var13 + 1), 0.0D, 0.0D, 1.0D);
                    var18.addVertexWithUV((double)(var15 - 1), (double)(var19 + var13 + 1), 0.0D, 1.0D, 1.0D);
                    var18.addVertexWithUV((double)(var15 - 1), (double)(var19 - 1), 0.0D, 1.0D, 0.0D);
                    var18.addVertexWithUV((double)(var14 + 1), (double)(var19 - 1), 0.0D, 0.0D, 0.0D);
                    var18.draw();
                    GL11.glEnable(GL11.GL_TEXTURE_2D);
                }

                this.drawSlot(var11, var9, var19, var13, var18);
            }
        }

        GL11.glDisable(GL11.GL_DEPTH_TEST);
        byte var20 = 4;
        this.overlayBackground(0, this.top, 255, 255);
        this.overlayBackground(this.bottom, this.height, 255, 255);
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GL11.glDisable(GL11.GL_ALPHA_TEST);
        GL11.glShadeModel(GL11.GL_SMOOTH);
        GL11.glDisable(GL11.GL_TEXTURE_2D);
        var18.startDrawingQuads();
        var18.setColorRGBA_I(0, 0);
        var18.addVertexWithUV((double)this.left, (double)(this.top + var20), 0.0D, 0.0D, 1.0D);
        var18.addVertexWithUV((double)this.right, (double)(this.top + var20), 0.0D, 1.0D, 1.0D);
        var18.setColorRGBA_I(0, 255);
        var18.addVertexWithUV((double)this.right, (double)this.top, 0.0D, 1.0D, 0.0D);
        var18.addVertexWithUV((double)this.left, (double)this.top, 0.0D, 0.0D, 0.0D);
        var18.draw();
        var18.startDrawingQuads();
        var18.setColorRGBA_I(0, 255);
        var18.addVertexWithUV((double)this.left, (double)this.bottom, 0.0D, 0.0D, 1.0D);
        var18.addVertexWithUV((double)this.right, (double)this.bottom, 0.0D, 1.0D, 1.0D);
        var18.setColorRGBA_I(0, 0);
        var18.addVertexWithUV((double)this.right, (double)(this.bottom - var20), 0.0D, 1.0D, 0.0D);
        var18.addVertexWithUV((double)this.left, (double)(this.bottom - var20), 0.0D, 0.0D, 0.0D);
        var18.draw();
        var19 = this.func_77209_d();

        if (var19 > 0)
        {
            var13 = (this.bottom - this.top) * (this.bottom - this.top) / this.getContentHeight();

            if (var13 < 32)
            {
                var13 = 32;
            }

            if (var13 > this.bottom - this.top - 8)
            {
                var13 = this.bottom - this.top - 8;
            }

            var14 = (int)this.amountScrolled * (this.bottom - this.top - var13) / var19 + this.top;

            if (var14 < this.top)
            {
                var14 = this.top;
            }

            var18.startDrawingQuads();
            var18.setColorRGBA_I(0, 255);
            var18.addVertexWithUV((double)var5, (double)this.bottom, 0.0D, 0.0D, 1.0D);
            var18.addVertexWithUV((double)var6, (double)this.bottom, 0.0D, 1.0D, 1.0D);
            var18.addVertexWithUV((double)var6, (double)this.top, 0.0D, 1.0D, 0.0D);
            var18.addVertexWithUV((double)var5, (double)this.top, 0.0D, 0.0D, 0.0D);
            var18.draw();
            var18.startDrawingQuads();
            var18.setColorRGBA_I(8421504, 255);
            var18.addVertexWithUV((double)var5, (double)(var14 + var13), 0.0D, 0.0D, 1.0D);
            var18.addVertexWithUV((double)var6, (double)(var14 + var13), 0.0D, 1.0D, 1.0D);
            var18.addVertexWithUV((double)var6, (double)var14, 0.0D, 1.0D, 0.0D);
            var18.addVertexWithUV((double)var5, (double)var14, 0.0D, 0.0D, 0.0D);
            var18.draw();
            var18.startDrawingQuads();
            var18.setColorRGBA_I(12632256, 255);
            var18.addVertexWithUV((double)var5, (double)(var14 + var13 - 1), 0.0D, 0.0D, 1.0D);
            var18.addVertexWithUV((double)(var6 - 1), (double)(var14 + var13 - 1), 0.0D, 1.0D, 1.0D);
            var18.addVertexWithUV((double)(var6 - 1), (double)var14, 0.0D, 1.0D, 0.0D);
            var18.addVertexWithUV((double)var5, (double)var14, 0.0D, 0.0D, 0.0D);
            var18.draw();
        }

        this.func_77215_b(par1, par2);
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glShadeModel(GL11.GL_FLAT);
        GL11.glEnable(GL11.GL_ALPHA_TEST);
        GL11.glDisable(GL11.GL_BLEND);
    }