I have a button that appears in a HUD GUI after a key is pressed. this button is clickable and works. I want to make this button open up the players inventory and disable the "E" key for opening inventory that way. I have tried the following in my GUI button class but this didnt work. Anyone know how to open the players vanilla item inventory using a GUI button.

 

@Override
    protected void actionPerformed(GuiButton button){
          f(button.id == BUTTON_ITEM_ID){
            	 System.out.println("open item inventory"); // this outprints when I click my button but no inventory opens
            	EntityPlayer player = Minecraft.getMinecraft().thePlayer; //Client side player
                player.inventory.openInventory();
              }
}

You can open player inventory using Minecraft#displayGuiScreen(new GuiInventory(this.thePlayer)).