RangeDefaults.kt
/*
* Copyright 2021 The Android Open Source Project
*
* 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.
*/
package androidx.wear.compose.material
import androidx.compose.foundation.progressSemantics
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.disabled
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.semantics.setProgress
import androidx.wear.compose.materialcore.RangeDefaults
internal fun Modifier.rangeSemantics(
value: Float,
enabled: Boolean,
onValueChange: (Float) -> Unit,
valueRange: ClosedFloatingPointRange<Float>,
steps: Int
): Modifier {
val step = RangeDefaults.snapValueToStep(value, valueRange, steps)
return semantics(mergeDescendants = true) {
if (!enabled) disabled()
setProgress(
action = { targetValue ->
val newStepIndex = RangeDefaults.snapValueToStep(targetValue, valueRange, steps)
if (step == newStepIndex) {
false
} else {
onValueChange(targetValue)
true
}
}
)
}.progressSemantics(
RangeDefaults.calculateCurrentStepValue(step, steps, valueRange), valueRange, steps
)
}
internal fun IntProgression.stepsNumber(): Int = (last - first) / step - 1