| /* |
| * Copyright 2019 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.compose.foundation.text.demos |
| |
| import androidx.compose.Composable |
| import androidx.compose.foundation.BaseTextField |
| import androidx.compose.foundation.ExperimentalFoundationApi |
| import androidx.compose.foundation.ScrollableColumn |
| import androidx.compose.runtime.savedinstancestate.savedInstanceState |
| import androidx.compose.state |
| import androidx.ui.core.focus.FocusModifier |
| import androidx.ui.graphics.Color |
| import androidx.ui.input.ImeAction |
| import androidx.ui.input.TextFieldValue |
| import androidx.ui.text.TextStyle |
| import androidx.ui.unit.sp |
| |
| @Composable |
| fun TextFieldFocusTransition() { |
| val focusModifiers = List(6) { |
| // TODO(b/161297615): Replace FocusModifier with Modifier.focus() |
| @Suppress("DEPRECATION") |
| FocusModifier() |
| } |
| |
| ScrollableColumn { |
| TextFieldWithFocusId(focusModifiers[0], focusModifiers[1]) |
| TextFieldWithFocusId(focusModifiers[1], focusModifiers[2]) |
| TextFieldWithFocusId(focusModifiers[2], focusModifiers[3]) |
| TextFieldWithFocusId(focusModifiers[3], focusModifiers[4]) |
| TextFieldWithFocusId(focusModifiers[4], focusModifiers[5]) |
| TextFieldWithFocusId(focusModifiers[5], focusModifiers[0]) |
| } |
| } |
| |
| // TODO(b/161297615): Replace the deprecated FocusModifier with the new Focus API. |
| @Suppress("DEPRECATION") |
| @OptIn(ExperimentalFoundationApi::class) |
| @Composable |
| private fun TextFieldWithFocusId(focusModifier: FocusModifier, nextFocusModifier: FocusModifier) { |
| val state = savedInstanceState(saver = TextFieldValue.Saver) { |
| TextFieldValue("Focus Transition Test") |
| } |
| val focused = state { false } |
| val color = if (focused.value) { |
| Color.Red |
| } else { |
| Color.Black |
| } |
| BaseTextField( |
| value = state.value, |
| modifier = focusModifier, |
| textStyle = TextStyle(color = color, fontSize = 32.sp), |
| onValueChange = { |
| state.value = it |
| }, |
| onFocusChanged = { focused.value = it }, |
| imeAction = ImeAction.Next, |
| onImeActionPerformed = { |
| if (it == ImeAction.Next) |
| nextFocusModifier.requestFocus() |
| } |
| ) |
| } |