| /* |
| * 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.ui.core.demos.gestures |
| |
| import androidx.compose.Composable |
| import androidx.compose.state |
| import androidx.ui.core.Alignment |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.gesture.pressIndicatorGestureFilter |
| import androidx.ui.foundation.Border |
| import androidx.ui.foundation.Box |
| import androidx.ui.foundation.Text |
| import androidx.ui.graphics.compositeOver |
| import androidx.ui.layout.Column |
| import androidx.ui.layout.fillMaxSize |
| import androidx.ui.layout.preferredSize |
| import androidx.ui.layout.wrapContentSize |
| import androidx.ui.unit.PxPosition |
| import androidx.ui.unit.dp |
| |
| /** |
| * Simple [pressIndicatorGestureFilter] demo. |
| */ |
| @Composable |
| fun PressIndicatorGestureFilterDemo() { |
| val pressed = state { false } |
| |
| val onStart: (PxPosition) -> Unit = { |
| pressed.value = true |
| } |
| |
| val onStop = { |
| pressed.value = false |
| } |
| |
| val color = |
| if (pressed.value) { |
| PressedColor.compositeOver(Grey) |
| } else { |
| Grey |
| } |
| |
| Column { |
| Text("The box shows press indication when you press it.") |
| Box( |
| Modifier.fillMaxSize() |
| .wrapContentSize(Alignment.Center) |
| .pressIndicatorGestureFilter(onStart, onStop, onStop) |
| .preferredSize(192.dp), |
| backgroundColor = color, |
| border = Border(2.dp, BorderColor) |
| ) |
| } |
| } |
