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@@ -28,6 +28,7 @@ enum class ItemType{ | |
| SWITCH, | ||
| SLIDER, | ||
| LABEL, | ||
| JOYSTICK, | ||
| BUTTON, | ||
| DPAD | ||
| } | ||
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app/src/main/java/com/github/umer0586/droidpad/ui/components/ControlPadJoyStick.kt
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| /* | ||
| * This file is a part of DroidPad (https://www.github.com/umer0586/DroidPad) | ||
| * Copyright (C) 2025 Umer Farooq (umerfarooq2383@gmail.com) | ||
| * | ||
| * DroidPad is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * DroidPad is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with DroidPad. If not, see <https://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
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| package com.github.umer0586.droidpad.ui.components | ||
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| import androidx.compose.foundation.Canvas | ||
| import androidx.compose.foundation.gestures.TransformableState | ||
| import androidx.compose.foundation.gestures.detectDragGestures | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.BoxWithConstraints | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.foundation.layout.size | ||
| import androidx.compose.material3.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.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.geometry.Offset | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.input.pointer.pointerInput | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.dp | ||
| import androidx.compose.ui.unit.min | ||
| import com.github.umer0586.droidpad.data.properties.JoyStickProperties | ||
| import com.github.umer0586.droidpad.ui.theme.DroidPadTheme | ||
| import kotlin.math.pow | ||
| import kotlin.math.sqrt | ||
|
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||
| @Composable | ||
| fun ControlPadJoyStick( | ||
| modifier: Modifier = Modifier, | ||
| offset: Offset, | ||
| rotation: Float, | ||
| scale: Float, | ||
| properties: JoyStickProperties = JoyStickProperties(), | ||
| enabled: Boolean = true, | ||
| transformableState: TransformableState? = null, | ||
| showControls: Boolean = true, | ||
| onEditClick: (() -> Unit)? = null, | ||
| onDeleteClick: (() -> Unit)? = null, | ||
| onMove: ((Float, Float) -> Unit)? = null | ||
|
|
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| ) { | ||
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| ControlPadItemBase( | ||
| modifier = modifier, | ||
| offset = offset, | ||
| rotation = rotation, | ||
| scale = scale, | ||
| transformableState = transformableState, | ||
| showControls = showControls, | ||
| onEditClick = onEditClick, | ||
| onDeleteClick = onDeleteClick | ||
| ){ | ||
| Joystick( | ||
| modifier = Modifier.size(150.dp), | ||
| enable = enabled, | ||
| backgroundColor = Color(properties.backgroundColor), | ||
| handleColor = Color(properties.handleColor), | ||
| onMove = { x, y -> | ||
| onMove?.invoke(x, y) | ||
| } | ||
| ) | ||
| } | ||
| } | ||
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| @Composable | ||
| fun Joystick( | ||
| modifier: Modifier = Modifier, | ||
| enable: Boolean = false, | ||
| backgroundColor: Color = Color.LightGray, | ||
| handleColor: Color = Color.Blue, | ||
| onMove: (Float, Float) -> Unit | ||
| ) { | ||
| val handleRadiusFactor = 0.4f // Ratio of handle radius to joystick radius | ||
| var handlePosition by remember { mutableStateOf(Offset(0f, 0f)) } | ||
| var isDraggingHandle by remember { mutableStateOf(false) } // Track if the handle is being dragged | ||
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| BoxWithConstraints(modifier = modifier) { | ||
| val size = min(maxWidth, maxHeight) // Dp value for joystick size | ||
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| Canvas( | ||
| modifier = Modifier | ||
| .size(size) // Use size as Dp | ||
| .pointerInput(enable) { // Reinitialize interaction based on `disable` | ||
| if (enable) { | ||
| detectDragGestures( | ||
| onDragStart = { offset -> | ||
| val canvasCenter = Offset(size.toPx() / 2, size.toPx() / 2) | ||
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| // Distance from touch point to joystick handle | ||
| val distanceToHandle = (offset - (canvasCenter + handlePosition)).getDistance() | ||
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| // Start dragging only if within the handle radius | ||
| val handleRadius = (size.toPx() / 2) * handleRadiusFactor | ||
| isDraggingHandle = distanceToHandle <= handleRadius | ||
| }, | ||
| onDrag = { change, dragAmount -> | ||
| if (isDraggingHandle) { | ||
| // Calculate new handle position | ||
| val joystickRadius = size.toPx() / 2 | ||
| val newOffset = handlePosition + Offset(dragAmount.x, dragAmount.y) | ||
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| // Clamp the handle within the circular boundary | ||
| val distance = sqrt(newOffset.x.pow(2) + newOffset.y.pow(2)) | ||
| handlePosition = if (distance <= joystickRadius) { | ||
| newOffset | ||
| } else { | ||
| // Scale to the boundary of the circle | ||
| val scale = joystickRadius / distance | ||
| Offset(newOffset.x * scale, newOffset.y * scale) | ||
| } | ||
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| // Normalize to range [-1, 1] | ||
| // The joystick's normalized value gets very close to 1 or -1 (e.g., 0.9999324) but never reaches exactly 1 due to floating-point precision. | ||
| // TODO: To handle this, set a threshold: if the value is greater than or equal to 0.9999, treat it as 1 (or -1). | ||
| val normalizedX = handlePosition.x / joystickRadius | ||
| val normalizedY = -handlePosition.y / joystickRadius | ||
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| onMove(normalizedX, normalizedY) | ||
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| // Consume the gesture | ||
| change.consume() | ||
| } | ||
| }, | ||
| onDragEnd = { | ||
| // Snap handle back to center | ||
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| handlePosition = Offset(0f, 0f) | ||
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| onMove(0f, 0f) | ||
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| isDraggingHandle = false | ||
| } | ||
| ) | ||
| } | ||
| } | ||
| ) { | ||
| val joystickRadius = size.toPx() / 2 | ||
| val canvasCenter = Offset(joystickRadius, joystickRadius) | ||
| val handleRadius = joystickRadius * handleRadiusFactor | ||
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| // Draw the joystick area | ||
| drawCircle( | ||
| color = backgroundColor, | ||
| radius = joystickRadius, | ||
| center = canvasCenter | ||
| ) | ||
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| // Draw the joystick handle | ||
| drawCircle( | ||
| color = handleColor, | ||
| radius = handleRadius, | ||
| center = canvasCenter + handlePosition | ||
| ) | ||
| } | ||
| } | ||
| } | ||
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| @Preview(showBackground = true) | ||
| @Composable | ||
| private fun ControlPadJoyStickPreview() { | ||
| DroidPadTheme { | ||
| ControlPadJoyStick( | ||
| offset = Offset.Zero, | ||
| rotation = 0f, | ||
| scale = 1f, | ||
| showControls = true | ||
| ) | ||
| } | ||
| } | ||
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| @Preview(showBackground = true) | ||
| @Composable | ||
| private fun JoyStickPreview(modifier: Modifier = Modifier) { | ||
| DroidPadTheme { | ||
| Box( | ||
| modifier = Modifier.fillMaxSize(), | ||
| contentAlignment = Alignment.Center | ||
| ){ | ||
| var cords by remember { | ||
| mutableStateOf("(0,0)") | ||
| } | ||
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| Text( | ||
| modifier = Modifier.align(Alignment.TopCenter), | ||
| text = cords | ||
| ) | ||
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| Joystick( | ||
| modifier = modifier.size(250.dp), | ||
| enable = true, | ||
| onMove = { x, y -> | ||
| cords = "($x,$y)" | ||
| } | ||
| ) | ||
| } | ||
| } | ||
| } | ||
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