taler-android

Android apps for GNU Taler (wallet, PoS, cashier)
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DemandAttention.kt (2423B)

      1 /*
      2  * This file is part of GNU Taler
      3  * (C) 2024 Taler Systems S.A.
      4  *
      5  * GNU Taler is free software; you can redistribute it and/or modify it under the
      6  * terms of the GNU General Public License as published by the Free Software
      7  * Foundation; either version 3, or (at your option) any later version.
      8  *
      9  * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
     10  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     11  * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
     12  *
     13  * You should have received a copy of the GNU General Public License along with
     14  * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
     15  */
     16 
     17 package net.taler.wallet.compose
     18 
     19 import androidx.compose.animation.core.Animatable
     20 import androidx.compose.animation.core.LinearEasing
     21 import androidx.compose.animation.core.RepeatMode
     22 import androidx.compose.animation.core.repeatable
     23 import androidx.compose.animation.core.tween
     24 import androidx.compose.foundation.layout.Box
     25 import androidx.compose.foundation.layout.offset
     26 import androidx.compose.runtime.Composable
     27 import androidx.compose.runtime.LaunchedEffect
     28 import androidx.compose.runtime.remember
     29 import androidx.compose.ui.Modifier
     30 import androidx.compose.ui.unit.dp
     31 import kotlinx.coroutines.delay
     32 
     33 @Composable
     34 fun DemandAttention(
     35     initialDelayMillis: Long = 400,
     36     wiggleWidth: Float = 5f,
     37     wiggleCount: Int = 2,
     38     demandAttention: Boolean = true,
     39     content: @Composable () -> Unit,
     40 ) {
     41     val offsetX = remember { Animatable(0f) }
     42 
     43     suspend fun wiggle() {
     44         offsetX.animateTo(
     45             targetValue = -wiggleWidth,
     46             animationSpec = tween(80, easing = LinearEasing),
     47         )
     48 
     49         offsetX.animateTo(
     50             targetValue = wiggleWidth,
     51             animationSpec = repeatable(
     52                 iterations = 5,
     53                 animation = tween(90, easing = LinearEasing),
     54                 repeatMode = RepeatMode.Reverse,
     55             )
     56         )
     57 
     58         offsetX.animateTo(
     59             targetValue = 0f,
     60             animationSpec = tween(80, easing = LinearEasing),
     61         )
     62     }
     63 
     64     LaunchedEffect(demandAttention) {
     65         if (demandAttention) {
     66             delay(initialDelayMillis)
     67             repeat(wiggleCount) {
     68                 wiggle()
     69             }
     70         }
     71     }
     72 
     73     Box(Modifier.offset(offsetX.value.dp, 0.dp)) {
     74         content()
     75     }
     76 }