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compose-tooltip

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A small library which adds support for tooltips in Jetpack Compose

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# Compose Tooltip

[![](https://badgen.net/maven/v/maven-central/dev.patrickgold.compose.tooltip/tooltip)](https://mvnrepository.com/artifact/dev.patrickgold.compose.tooltip/tooltip) ![](https://badgen.net/github/license/patrickgold/compose-tooltip)

A small library which adds support for tooltips in Jetpack Compose on Android:

![Tooltip Demo](https://raw.githubusercontent.com/patrickgold/compose-tooltip/main/.github/compose-tooltip-preview.gif)

The 3 main goals of this library are:
- (a) have the ability to wrap any composable element with a plain tooltip
- (b) the look and behavior of the tooltip should by default match the Material 3 tooltip as close as possible
- (c) The plain tooltip should work in input method service window contexts

## Usage

### Dependency management

```kotlin
// settings.gradle.kts
repositories {
    mavenCentral()
}

// build.gradle.kts
dependencies {
    implementation("dev.patrickgold.compose.tooltip:tooltip:<version>")
}
```

### Basic example

The tooltip is applied as a wrapper `PlainTooltip` composable, for the default look only a text is passed:

```kotlin
PlainTooltip("Search examples") {
    IconButton(
        onClick = { exampleActionCallback("search") },
    ) {
        Icon(Icons.Outlined.Search, "Search examples")
    }
}
```

You can wrap basically any element with `PlainTooltip()`, however in practice you should follow the [Material guidelines](https://m3.material.io/components/tooltips) on where to put a tooltip and where not.

While the tooltip by default tries to mimic the Android framework tooltip as closely as possible, you can style the tooltip as you wish by passing further parameters. Please see the Documentation section for more info.

### Compose UI version compatibility

The following table outlines which Tooltip version matches which Compose version. You can use a different version of Compose UI and it may still work, however there are no guarantees.

| Tooltip | Compose UI | Kotlin |
|---------|------------|--------|
| 0.1.x   | 1.2.x      | 1.7.10 |
| 0.2.x   | 1.7.x      | 2.1.20 |

## Documentation

Material design tooltip following Android's framework tooltip design as close as possible by default.

The tooltip anchors itself automatically to the element this wrapper is applied and does automatic positioning and sizing in a similar way to the Android framework tooltip.

Both long-press touch interactions and mouse hover events are supported. For long-press touches, the tooltip starts to show after the user has triggered a long-click and will then stay until 1.5 seconds after the touch up or cancel event. For mouse hover interactions, the tooltip is shown after a minimum of 0.5 seconds hover, and then shows until either the mouse stops hovering or 15 seconds have passed, whichever comes first.

This composable by default can only be used within an Activity or InputMethodService context, as it requires a window to properly show. Alternatively a custom windowResolver can be passed, where the responsibility is up to the caller to find the window reference.

**_Parameters:_**

- `text`: The text to show in the tooltip, supports [AnnotatedString].
- `backgroundColor`: The background color of this tooltip. Defaults to Material 3 `color.inverseSurface`.
- `textColor`: The text color of this tooltip. Defaults to Material 3 `color.inverseOnSurface`.
- `textStyle`: The text style to be applied to the text. Defaults to Material 3 `typography.body-small`.
- `overflow`: How overflow of the text should be handled. Defaults to [TextOverflow.Ellipsis].
- `maxLines`: How many lines the tooltip can have at most. Defaults to 3.
- `margin`: The margin of this tooltip. Defaults to 8dp on all edges.
- `padding`: The padding of the tooltip. Defaults to 16dp horizontally and 6.5dp vertically.
- `shape`: The shape of the tooltip. Defaults to Material 3 `shape.corner.extra-small`.
- `enabled`: If this tooltip is enabled and showing on long-press. Defaults to true.
- `windowResolver`: The window resolver, which is responsible for retrieving the local window. The default implementation supports both [Activity] and [InputMethodService] contexts. If a custom provider is passed, it must not return null.

**_Composable signature:_**

```kotlin
@Composable
fun PlainTooltip(
    text: CharSequence,
    backgroundColor: Color = Color.Unspecified,
    textColor: Color = Color.Unspecified,
    textStyle: TextStyle = MaterialTheme.typography.bodySmall,
    overflow: TextOverflow = TextOverflow.Ellipsis,
    maxLines: Int = 3,
    margin: PaddingValues = TooltipMargin,
    padding: PaddingValues = TooltipPadding,
    shape: Shape = MaterialTheme.shapes.extraSmall,
    enabled: Boolean = true,
    windowResolver: @Composable () -> Window = { LocalContext.current.findWindow()!! },
    content: @Composable () -> Unit,
)
```

## Known issues

- For elements that are taller than the window height the positioning logic fails and causes the tooltip to be placed on the bottom edge of the window
- The tooltip currently does not provide accessibility semantics, may need to investigate if needed

## License

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
```

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