LayoutManager.java 文件源码

@Override
public void onPreDraw(GuiContainer gui) {
    if (!isHidden() && isEnabled() && gui instanceof InventoryEffectRenderer)//Reset the gui to the center of the screen, for potion effect offsets etc
    {
        gui.guiLeft = (gui.width - gui.xSize) / 2;
        gui.guiTop = (gui.height - gui.ySize) / 2;

        if (gui instanceof GuiContainerCreative && gui.buttonList.size() >= 2) {
            GuiButton button1 = (GuiButton) gui.buttonList.get(0);
            GuiButton button2 = (GuiButton) gui.buttonList.get(1);
            button1.xPosition = gui.guiLeft;
            button2.xPosition = gui.guiLeft + gui.xSize - 20;
        }
    }
}