TankWidget

The TankWidget represents a fluid slot widget within a container GUI. It displays a fluid in a designated tank and supports fluid interactions such as filling and emptying. In addition, it integrates with external systems (JEI/REI/EMI) to show fluid ingredient details and provides configurable options for hover overlays, tooltips, and click behavior.

Basic Properties

Field	Description
fluidTank	The fluid storage or transfer handler associated with this widget
tank	The index of the fluid tank being represented
showAmount	Determines whether the fluid amount is displayed
allowClickFilled	Controls whether clicking the slot when filled triggers container-filling behavior
allowClickDrained	Controls whether clicking the slot when empty triggers container-emptying behavior
drawHoverOverlay	Indicates if a hover overlay should be drawn when the mouse is over the widget
drawHoverTips	Indicates if hover tooltips should be displayed
fillDirection	The direction in which the fluid fill is rendered (e.g. DOWN_TO_UP)
lastFluidInTank	Last fluid stored in the tank
lastTankCapacity	Last tank capacity

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APIs

setFluidTank (IFluidStorage)

Associates the widget with a fluid storage and sets the tank index to 0.

tankWidget.setFluidTank(fluidStorage);

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setFluidTank (IFluidTransfer, int)

Associates the widget with a fluid transfer handler and specifies the tank index.

tankWidget.setFluidTank(fluidTransfer, 1);

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setFluid

Set the internal fluidstack with/without notify.

tankWidget.setFluid(fluidstack); // it will also trigger the listen you set
tankWidget.setFluid(fluidstack, false); // it wont trigger the listen

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getFluid

Get the internal fluidstack stored.

var fluidstack = tankWidget.getFluid();

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setChangeListener

Configures additional slot location information, such as whether it belongs to the player container or hotbar. It will affect the shift move behaviour.

tankWidget.setChangeListener(() -> {
    var last = tankWidget.getLastFluidInTank();
    var current = tankWidget.getFluid();
});

slotWidget.setChangeListener(() => {
    let last = tankWidget.getLastFluidInTank();
    let current = tankWidget.getFluid();
});

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