---
title: "TransformingLazyColumnItemScope"
description: "Receiver scope being used by the item content parameter of [TransformingLazyColumn]."
type: "interface"
---

<div class='type'>Interface</div>


<a id='references'></a>

<div class='sourceset sourceset-android'>Android</div>



```kotlin
@TransformingLazyColumnScopeMarker
public sealed interface TransformingLazyColumnItemScope
```


Receiver scope being used by the item content parameter of `TransformingLazyColumn`.


## Functions

```kotlin
public fun Modifier.transformedHeight(
        heightProvider:
            (measuredHeight: Int, scrollProgress: TransformingLazyColumnItemScrollProgress) -> Int
    ): Modifier
```


Applies the new height of the item depending on its scroll progress and measured height.

#### Parameters

| | |
| --- | --- |
| heightProvider | The transformation to be applied. The first parameter is the height of the item returned during measurement. The second parameter is the scroll progress of the item. This lambda should not read from any state values. |



```kotlin
public fun Modifier.animateItem(
        fadeInSpec: FiniteAnimationSpec<Float>? = spring(stiffness = Spring.StiffnessMediumLow),
        placementSpec: FiniteAnimationSpec<IntOffset>? =
            spring(
                stiffness = Spring.StiffnessMediumLow,
                visibilityThreshold = IntOffset.VisibilityThreshold,
            ),
        fadeOutSpec: FiniteAnimationSpec<Float>? = spring(stiffness = Spring.StiffnessMediumLow),
    ): Modifier
```


This modifier animates item appearance (fade in), disappearance (fade out) and placement
changes (such as an item reordering).

You should also provide a unique key via `TransformingLazyColumnScope.item`/
`TransformingLazyColumnScope.items` for this modifier to enable animations.

#### Parameters

| | |
| --- | --- |
| fadeInSpec | an animation spec to use for animating the item appearance. When null is provided the item will appear without animations. |
| placementSpec | an animation spec that will be used to animate the item placement. Aside from item reordering all other position changes caused by events like arrangement or alignment changes will also be animated. When null is provided no animations will happen. |
| fadeOutSpec | an animation spec to use for animating the item disappearance. When null is provided the item will be disappearance without animations. |



```kotlin
public fun Modifier.minimumVerticalContentPadding(top: Dp, bottom: Dp): Modifier
```


This modifier allows items to choose a preferred content padding for the list, if they are
placed at the top or bottom edge. When this item is at the top or bottom of the layout, the
`TransformingLazyColumn` takes its contentPadding as the maximum of these vertical padding
values and its own contentPadding parameter.

The vertical padding values are expected to be provided by design systems, such as the
recommended values in Material3 `ButtonDefaults`, `CardDefaults`, `ListHeaderDefaults` and so
on.

This modifier can be used to ensure that, when a list item is at the top or bottom of the
list, the distance from the item to the screen edge is sufficient (such as to avoid the item
being clipped by edges of a round screen).

#### Parameters

| | |
| --- | --- |
| top | The preferred top content padding for the list, when this item is placed at the top edge. Used when either this is the first item for a layout that is not reversed, or this is the last item for a reversed layout. |
| bottom | The preferred bottom content padding for the list, when this item is placed at the bottom edge. Used when either this is the last item for a layout that is not reversed, or this is the first item for a reversed layout. |



```kotlin
public fun Modifier.minimumVerticalContentPadding(padding: Dp): Modifier
```


This modifier allows items to choose a preferred content padding for the list, if they are
placed at the top or bottom edge. When this item is at the top or bottom of the layout, the
`TransformingLazyColumn` takes its contentPadding as the maximum of this vertical padding
value and its own contentPadding parameter.

The vertical padding values are expected to be provided by design systems, such as the
recommended values in Material3 `ButtonDefaults`, `CardDefaults`, `ListHeaderDefaults` and so
on.

This modifier can be used to ensure that, when a list item is at the top or bottom of the
list, the distance from the item to the screen edge is sufficient (such as to avoid the item
being clipped by edges of a round screen).

#### Parameters

| | |
| --- | --- |
| padding | The preferred content padding for the list, when this item is placed at either the top or bottom edges. |