| /* |
| * 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.compose.ui.demos.gestures |
| |
| import androidx.compose.foundation.background |
| import androidx.compose.foundation.gestures.awaitEachGesture |
| import androidx.compose.foundation.layout.Column |
| import androidx.compose.foundation.layout.Row |
| import androidx.compose.foundation.layout.fillMaxWidth |
| import androidx.compose.material.Text |
| import androidx.compose.runtime.Composable |
| import androidx.compose.runtime.getValue |
| import androidx.compose.runtime.mutableStateOf |
| import androidx.compose.runtime.remember |
| import androidx.compose.runtime.setValue |
| import androidx.compose.ui.Modifier |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.ui.input.pointer.isAltPressed |
| import androidx.compose.ui.input.pointer.isBackPressed |
| import androidx.compose.ui.input.pointer.isCapsLockOn |
| import androidx.compose.ui.input.pointer.isCtrlPressed |
| import androidx.compose.ui.input.pointer.isForwardPressed |
| import androidx.compose.ui.input.pointer.isFunctionPressed |
| import androidx.compose.ui.input.pointer.isMetaPressed |
| import androidx.compose.ui.input.pointer.isNumLockOn |
| import androidx.compose.ui.input.pointer.isPrimaryPressed |
| import androidx.compose.ui.input.pointer.isScrollLockOn |
| import androidx.compose.ui.input.pointer.isSecondaryPressed |
| import androidx.compose.ui.input.pointer.isShiftPressed |
| import androidx.compose.ui.input.pointer.isSymPressed |
| import androidx.compose.ui.input.pointer.isTertiaryPressed |
| import androidx.compose.ui.input.pointer.pointerInput |
| |
| /** |
| * Demo to show the state of buttons and meta keys |
| */ |
| @Composable |
| fun ButtonMetaStateDemo() { |
| var control by remember { mutableStateOf(false) } |
| var alt by remember { mutableStateOf(false) } |
| var shift by remember { mutableStateOf(false) } |
| var meta by remember { mutableStateOf(false) } |
| var sym by remember { mutableStateOf(false) } |
| var function by remember { mutableStateOf(false) } |
| var numLock by remember { mutableStateOf(false) } |
| var scrollLock by remember { mutableStateOf(false) } |
| var capsLock by remember { mutableStateOf(false) } |
| |
| var primary by remember { mutableStateOf(false) } |
| var secondary by remember { mutableStateOf(false) } |
| var tertiary by remember { mutableStateOf(false) } |
| var back by remember { mutableStateOf(false) } |
| var forward by remember { mutableStateOf(false) } |
| |
| fun trippedModifier(isActive: Boolean, color: Color) = |
| Modifier.background(if (isActive) color else Color.Transparent).fillMaxWidth() |
| |
| Column( |
| Modifier.pointerInput(Unit) { |
| awaitEachGesture { |
| do { |
| val event = awaitPointerEvent() |
| val metaState = event.keyboardModifiers |
| control = metaState.isCtrlPressed |
| alt = metaState.isAltPressed |
| shift = metaState.isShiftPressed |
| meta = metaState.isMetaPressed |
| sym = metaState.isSymPressed |
| function = metaState.isFunctionPressed |
| numLock = metaState.isNumLockOn |
| scrollLock = metaState.isScrollLockOn |
| capsLock = metaState.isCapsLockOn |
| |
| val buttons = event.buttons |
| primary = buttons.isPrimaryPressed |
| secondary = buttons.isSecondaryPressed |
| tertiary = buttons.isTertiaryPressed |
| back = buttons.isBackPressed |
| forward = buttons.isForwardPressed |
| } while (event.changes.any { it.pressed }) |
| // In the future, hover events should work also, but it isn't |
| // implemented yet. |
| control = false |
| alt = false |
| shift = false |
| meta = false |
| sym = false |
| function = false |
| numLock = false |
| scrollLock = false |
| capsLock = false |
| primary = false |
| secondary = false |
| tertiary = false |
| back = false |
| forward = false |
| } |
| } |
| ) { |
| Text("Demonstrates which buttons and meta keys are active during pointer input") |
| Row { |
| Column(Modifier.weight(1f)) { |
| Text("Shift", trippedModifier(shift, Color.Blue)) |
| Text("Control", trippedModifier(control, Color.Green)) |
| Text("Alt", trippedModifier(alt, Color.Yellow)) |
| Text("Meta", trippedModifier(meta, Color.Red)) |
| Text("Sym", trippedModifier(sym, Color.Cyan)) |
| Text("Function", trippedModifier(function, Color.Magenta)) |
| Text("Num Lock", trippedModifier(numLock, Color.DarkGray)) |
| Text("Scroll Lock", trippedModifier(scrollLock, Color.Gray)) |
| Text("Caps Lock", trippedModifier(capsLock, Color.LightGray)) |
| } |
| Column(Modifier.weight(1f)) { |
| Text("Left", trippedModifier(primary, Color.Red)) |
| Text("Right", trippedModifier(secondary, Color.Yellow)) |
| Text("Middle", trippedModifier(tertiary, Color.Green)) |
| Text("Back", trippedModifier(back, Color.Blue)) |
| Text("Forward", trippedModifier(forward, Color.Magenta)) |
| } |
| } |
| } |
| } |
