Support for cursor stacks

[BRNSystems]

Could you add the ItemStack that the player is clicking with passing to the onClick family of events?
It is possible, since it is sent in the packet.
I know this won't be used much, but at least for my mod it would be useful.

[HyperPaint]

@BRNSystems hi. Have you found a way to get ItemStack in a click event? I'm trying to put an item in the gui, but I've only been able to take item from it :(

[BRNSystems]

In my mod, I only needed to take from the slot. @Patbox should be more helpful

[HyperPaint]

I did it, but not well. Shift + left click for return items, right click for divide items and left click + move doesnt work. But i can put and get items.

final GuiElementInterface.ClickCallback clickCallback = new GuiElementInterface.ClickCallback() {
   @Override
   public void click(int index, ClickType type, SlotActionType action, SlotGuiInterface gui) {
       if (action == SlotActionType.PICKUP) {
           final ItemStack playerItemStack = serverPlayerEntity.currentScreenHandler.getCursorStack();
           final GuiElementInterface slot = gui.getSlot(index);
           final ItemStack slotItemStack = slot == null ? ItemStack.EMPTY : slot.getItemStack();
           if (!playerItemStack.isEmpty() && slotItemStack.isEmpty()) {
               // Положить предмет
               gui.setSlot(index, playerItemStack.copyAndEmpty(), this);
           } else if (!playerItemStack.isEmpty() && playerItemStack.getItem().equals(slotItemStack.getItem())) {
               // Доложить предмет
               final int count = playerItemStack.getCount() + slotItemStack.getCount();
               final int maxCount = slotItemStack.getMaxCount();
               if (count > maxCount) {
                   slotItemStack.setCount(maxCount);
                   playerItemStack.setCount(count - playerItemStack.getCount());
               } else {
                   slotItemStack.setCount(count);
                   playerItemStack.setCount(0);
               }
           } else if (playerItemStack.isEmpty() && !slotItemStack.isEmpty()) {
               // Взять предмет
               serverPlayerEntity.currentScreenHandler.setCursorStack(slotItemStack.copyAndEmpty());
           }
       }
   }
};

SimpleGuiBuilder builder = new SimpleGuiBuilder(ScreenHandlerType.HOPPER, false);
for (int i = 0; i < HopperScreenHandler.SLOT_COUNT; i++) {
   builder.setSlot(i, ItemStack.EMPTY, clickCallback);
}
SimpleGui simpleGui = builder.build(serverPlayerEntity);
simpleGui.setLockPlayerInventory(false);
simpleGui.open();

But at some moment, interaction becomes unstable, as if there is a problem with synchronization