ProgressBar

Since 2.2.1

ProgressBar displays a value within a configurable [min, max] range as a partially-filled bar. The fill direction, interpolation animation, and inner textures are all configurable. An optional centered Label can overlay the bar.

ProgressBar implements IBindable<Float> and IDataConsumer<Float>, so its value can be driven by a data provider and kept in sync with the server automatically.

INFO

Everything documented on UIElement (layout, styles, events, data bindings, etc.) applies here too.

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Usage

var bar = new ProgressBar();
bar.setRange(0, 100);
bar.setProgress(75f);
parent.addChild(bar);

// Data-bound (server → client, ticks every tick)
bar.bindDataSource(DataBindingBuilder.floatValS2C(
    () -> machine.getProgress() / (float) machine.getMaxProgress()
).build());

progressBar({
    layout { width(80).height(14) }
    style { background(Sprites.PROGRESS_CONTAINER) }
}) {
    api {
        setRange(0f, 100f)
        setProgress(75f)
    }
}

let bar = new ProgressBar();
bar.setRange(0, 100);
bar.setProgress(75);
parent.addChild(bar);

---

XML

<!-- Basic progress bar at 50 % -->
<progress-bar min-value="0" max-value="100" value="50"/>

<!-- With a centered text label -->
<progress-bar min-value="0" max-value="200" value="100" text="my.progress.key"/>

XML Attribute	Type	Description
min-value	float	Minimum value. Default: 0.
max-value	float	Maximum value. Default: 1.
value	float	Current value. Default: 0.
text	string	Sets the overlay label (translated).

---

Internal Structure

Index	Field	Type	CSS class	Description
0	barContainer	UIElement	.__progress-bar_bar-container__	Outer container with the background texture and padding.

The following elements are nested inside the internal structure:

Field	CSS class	Description
bar	.__progress-bar_bar__	The filled portion of the bar.
label	.__progress-bar_label__	The optional overlay Label (absolute-positioned, centred).

---

Progress Bar Style

INFO

fill-direction

Direction in which the bar fills as the value increases.

Default: LEFT_TO_RIGHT

Value	Description
LEFT_TO_RIGHT	Bar grows from the left edge.
RIGHT_TO_LEFT	Bar grows from the right edge.
UP_TO_DOWN	Bar grows from the top edge.
DOWN_TO_UP	Bar grows from the bottom edge.
ALWAYS_FULL	Bar is always fully visible regardless of value.

bar.progressBarStyle(style -> style.fillDirection(FillDirection.DOWN_TO_UP));

progress-bar {
    fill-direction: DOWN_TO_UP;
}

INFO

interpolate

When true, the bar visually animates toward the target value each tick instead of jumping.

Default: true

bar.progressBarStyle(style -> style.interpolate(false));

progress-bar {
    interpolate: false;
}

INFO

interpolate-step

Fraction of the total range (max - min) moved per tick during interpolation. Negative values use partial-tick lerp for extra smoothness.

Default: 0.1

bar.progressBarStyle(style -> style.interpolateStep(0.05f)); // slower animation
bar.progressBarStyle(style -> style.interpolateStep(-1f));    // partial-tick lerp

progress-bar {
    interpolate-step: 0.05;
}

---

Customising the Bar Texture

The bar uses Sprites.PROGRESS_CONTAINER for the outer container and Sprites.PROGRESS_BAR for the fill. Override these via style or DSL:

bar.barContainer(c -> c.style(s -> s.background(myContainerTexture)));
bar.bar(b -> b.style(s -> s.background(myBarTexture)));

.__progress-bar_bar-container__ {
    background: sprite("mymod:textures/gui/bar_bg.png");
}
.__progress-bar_bar__ {
    background: sprite("mymod:textures/gui/bar_fill.png");
}

---

Data Binding

ProgressBar subscribes to IDataProvider<Float> for automatic value updates.

var binding = DataBindingBuilder.floatValS2C(
    () -> machine.getProgress() / (float) machine.getMaxProgress()
).build();

bar.bindDataSource(binding);
bar.unbindDataSource(binding); // when done

See Data Bindings for the full binding API.

---

Fields

Name	Type	Access	Description
barContainer	UIElement	public final	Outer container element.
bar	UIElement	public final	The filled bar element.
label	Label	public final	The overlay label element.
progressBarStyle	ProgressBarStyle	private (getter)	Current progress bar style.
minValue	float	private (getter)	Minimum range value.
maxValue	float	private (getter)	Maximum range value.

---

Methods

Method	Returns	Description
setProgress(float)	ProgressBar	Sets the current value (clamped to [min, max]).
setRange(float, float)	ProgressBar	Sets the [min, max] range and re-evaluates the current value.
setMinValue(float)	ProgressBar	Sets the minimum value.
setMaxValue(float)	ProgressBar	Sets the maximum value.
progressBarStyle(Consumer<ProgressBarStyle>)	ProgressBar	Configures ProgressBarStyle fluently.
bar(Consumer<UIElement>)	ProgressBar	Configures the fill bar element.
barContainer(Consumer<UIElement>)	ProgressBar	Configures the outer container element.
label(Consumer<Label>)	ProgressBar	Configures the overlay label.
bindDataSource(IDataProvider<Float>)	ProgressBar	Subscribes to a data provider.
unbindDataSource(IDataProvider<Float>)	ProgressBar	Unsubscribes from a data provider.
getValue()	Float	Returns the current value.
getNormalizedValue()	float	Returns the current value normalized to [0, 1].