| /* |
| * Copyright 2020 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.doubleTapGestureFilter |
| import androidx.ui.core.gesture.tapGestureFilter |
| import androidx.compose.foundation.Box |
| import androidx.compose.foundation.Text |
| import androidx.compose.foundation.background |
| import androidx.compose.foundation.drawBorder |
| import androidx.compose.ui.geometry.Offset |
| import androidx.compose.ui.graphics.RectangleShape |
| import androidx.compose.foundation.layout.Column |
| import androidx.compose.foundation.layout.fillMaxSize |
| import androidx.compose.foundation.layout.preferredSize |
| import androidx.compose.foundation.layout.wrapContentSize |
| import androidx.ui.unit.dp |
| |
| @Composable |
| fun DoubleTapInTapDemo() { |
| val defaultColor = Grey |
| |
| val innerColor = state { defaultColor } |
| val outerColor = state { defaultColor } |
| |
| val onTap: (Offset) -> Unit = { |
| outerColor.value = outerColor.value.next() |
| } |
| |
| val onDoubleTap: (Offset) -> Unit = { _ -> |
| innerColor.value = innerColor.value.prev() |
| } |
| |
| Column { |
| Text( |
| "Demonstrates interaction between DoubleTapGestureFilter and TapGestureFilter in an " + |
| "edge case that is nevertheless supported (normally regions will be separated" + |
| " by a pressIndicatorGestureFilter, but here they are not)." |
| ) |
| Text( |
| "Double tap the inner box to change the inner box color. Tap anywhere in the outer " + |
| "box once (including the inner box) to change the outer box background " + |
| "color. Tap rapidly with one or more fingers anywhere and the colors should" + |
| "change as one would expect." |
| ) |
| Box( |
| Modifier |
| |
| .fillMaxSize() |
| .wrapContentSize(Alignment.Center) |
| .preferredSize(192.dp) |
| .tapGestureFilter(onTap) |
| .drawBorder(2.dp, BorderColor) |
| .background(color = outerColor.value) |
| |
| .fillMaxSize() |
| .wrapContentSize(Alignment.Center) |
| .preferredSize(96.dp) |
| .doubleTapGestureFilter(onDoubleTap) |
| .drawBorder(2.dp, BorderColor) |
| .background(color = innerColor.value, shape = RectangleShape) |
| ) |
| } |
| } |