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presentation/src/main/java/com/desarrollodroide/pagekeeper/ui/components/LoadingButton.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| package com.desarrollodroide.pagekeeper.ui.components | ||
|
|
||
| import androidx.compose.animation.AnimatedVisibility | ||
| import androidx.compose.animation.ExperimentalAnimationApi | ||
| import androidx.compose.animation.core.Spring | ||
| import androidx.compose.animation.core.Transition | ||
| import androidx.compose.animation.core.VisibilityThreshold | ||
| import androidx.compose.animation.core.animateDp | ||
| import androidx.compose.animation.core.spring | ||
| import androidx.compose.animation.core.updateTransition | ||
| import androidx.compose.animation.expandHorizontally | ||
| import androidx.compose.animation.fadeIn | ||
| import androidx.compose.animation.fadeOut | ||
| import androidx.compose.animation.shrinkHorizontally | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.PaddingValues | ||
| import androidx.compose.foundation.layout.defaultMinSize | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.layout.size | ||
| import androidx.compose.material3.Button | ||
| import androidx.compose.material3.CircularProgressIndicator | ||
| import androidx.compose.material3.LocalContentColor | ||
| import androidx.compose.material3.Text | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.ui.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.graphics.StrokeCap | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.IntSize | ||
| import androidx.compose.ui.unit.dp | ||
|
|
||
| @Composable | ||
| fun LoadingButton( | ||
| text: String, | ||
| onClick: () -> Unit, | ||
| loading: Boolean, | ||
| ) { | ||
| val transition = updateTransition( | ||
| targetState = loading, | ||
| label = "master transition", | ||
| ) | ||
| val horizontalContentPadding by transition.animateDp( | ||
| transitionSpec = { | ||
| spring( | ||
| stiffness = SpringStiffness, | ||
| ) | ||
| }, | ||
| targetValueByState = { toLoading -> if (toLoading) 12.dp else 24.dp }, | ||
| label = "button's content padding", | ||
| ) | ||
| Button( | ||
| onClick = onClick, | ||
| modifier = Modifier.defaultMinSize(minWidth = 1.dp), | ||
| contentPadding = PaddingValues( | ||
| horizontal = horizontalContentPadding, | ||
| vertical = 8.dp, | ||
| ), | ||
| ) { | ||
| Box(contentAlignment = Alignment.Center) { | ||
| LoadingContent( | ||
| loadingStateTransition = transition, | ||
| ) | ||
| PrimaryContent( | ||
| text = text, | ||
| loadingStateTransition = transition, | ||
| ) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @OptIn(ExperimentalAnimationApi::class) | ||
| @Composable | ||
| private fun LoadingContent( | ||
| loadingStateTransition: Transition<Boolean>, | ||
| ) { | ||
| loadingStateTransition.AnimatedVisibility( | ||
| visible = { loading -> loading }, | ||
| enter = fadeIn(), | ||
| exit = fadeOut( | ||
| animationSpec = spring( | ||
| stiffness = SpringStiffness, | ||
| visibilityThreshold = 0.10f, | ||
| ), | ||
| ), | ||
| ) { | ||
| CircularProgressIndicator( | ||
| modifier = Modifier.size(18.dp), | ||
| color = LocalContentColor.current, | ||
| strokeWidth = 1.5f.dp, | ||
| strokeCap = StrokeCap.Round, | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| @OptIn(ExperimentalAnimationApi::class) | ||
| @Composable | ||
| private fun PrimaryContent( | ||
| loadingStateTransition: Transition<Boolean>, | ||
| text: String, | ||
| ) { | ||
| loadingStateTransition.AnimatedVisibility( | ||
| visible = { loading -> !loading }, | ||
| enter = fadeIn() + expandHorizontally( | ||
| animationSpec = spring( | ||
| stiffness = SpringStiffness, | ||
| dampingRatio = Spring.DampingRatioMediumBouncy, | ||
| visibilityThreshold = IntSize.VisibilityThreshold, | ||
| ), | ||
| expandFrom = Alignment.CenterHorizontally, | ||
| ), | ||
| exit = fadeOut( | ||
| animationSpec = spring( | ||
| stiffness = SpringStiffness, | ||
| visibilityThreshold = 0.10f, | ||
| ), | ||
| ) + shrinkHorizontally( | ||
| animationSpec = spring( | ||
| stiffness = SpringStiffness, | ||
| // dampingRatio is not applicable here, size cannot become negative | ||
| visibilityThreshold = IntSize.VisibilityThreshold, | ||
| ), | ||
| shrinkTowards = Alignment.CenterHorizontally, | ||
| ), | ||
| ) { | ||
| Text( | ||
| text = text, | ||
| modifier = Modifier | ||
| // so that bouncing button's width doesn't cut first and last letters | ||
| .padding(horizontal = 4.dp), | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| // use same spring stiffness so that all animations finish at about the same time | ||
| private val SpringStiffness = Spring.StiffnessMediumLow | ||
|
|
||
| @Preview | ||
| @Composable | ||
| private fun LoadingButtonPreview() { | ||
| Box( | ||
| modifier = Modifier.fillMaxWidth(), | ||
| contentAlignment = Alignment.Center, | ||
| ) { | ||
| LoadingButton( | ||
| text = "Login", | ||
| onClick = {}, | ||
| loading = false, | ||
| ) | ||
| } | ||
| } |
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