| /* |
| * 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.ui.demos.gestures |
| |
| import androidx.compose.foundation.background |
| import androidx.compose.foundation.border |
| import androidx.compose.foundation.gestures.detectTapGestures |
| import androidx.compose.foundation.layout.Box |
| import androidx.compose.foundation.layout.Column |
| import androidx.compose.foundation.layout.fillMaxSize |
| import androidx.compose.foundation.layout.size |
| import androidx.compose.foundation.layout.wrapContentSize |
| import androidx.compose.material.Text |
| import androidx.compose.runtime.Composable |
| import androidx.compose.runtime.mutableStateOf |
| import androidx.compose.runtime.remember |
| import androidx.compose.ui.Alignment |
| import androidx.compose.ui.Modifier |
| import androidx.compose.ui.geometry.Offset |
| import androidx.compose.ui.input.pointer.pointerInput |
| import androidx.compose.ui.unit.dp |
| |
| /** |
| * Simple [detectTapGestures] demo for double tap. |
| */ |
| @Composable |
| fun DoubleTapGestureFilterDemo() { |
| val color = remember { mutableStateOf(Colors.random()) } |
| |
| val onDoubleTap: (Offset) -> Unit = { |
| color.value = color.value.anotherRandomColor() |
| } |
| |
| Column { |
| Text("The box changes color when you double tap it.") |
| Box( |
| Modifier.fillMaxSize() |
| .wrapContentSize(Alignment.Center) |
| .size(192.dp) |
| .pointerInput(Unit) { detectTapGestures(onDoubleTap = onDoubleTap) } |
| .border(2.dp, BorderColor) |
| .background(color = color.value) |
| ) |
| } |
| } |