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package org.terst.nav.temp // Temporarily placing in 'temp' due to permissions, actual package should be 'org.terst.nav'
import android.content.Context
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.Paint
import android.graphics.Rect
import android.util.AttributeSet
import android.view.View
import kotlin.math.cos
import kotlin.math.min
import kotlin.math.sin
class CompassRoseView @JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : View(context, attrs, defStyleAttr) {
private var heading: Float = 0f // Current heading in degrees
set(value) {
field = value % 360 // Ensure heading is within 0-359
invalidate()
}
private var cog: Float = 0f // Course Over Ground in degrees
set(value) {
field = value % 360
invalidate()
}
private var isTrueHeading: Boolean = true // True for True heading, false for Magnetic
private val rosePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
color = Color.DKGRAY
style = Paint.Style.STROKE
strokeWidth = 2f
}
private val textPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
color = Color.WHITE
textSize = 30f
textAlign = Paint.Align.CENTER
}
private val cardinalTextPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
color = Color.WHITE
textSize = 40f
textAlign = Paint.Align.CENTER
isFakeBoldText = true
}
private val majorTickPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
color = Color.WHITE
strokeWidth = 3f
}
private val minorTickPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
color = Color.GRAY
strokeWidth = 1f
}
private val headingNeedlePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
color = Color.RED
style = Paint.Style.FILL
}
private val cogArrowPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
color = Color.BLUE
style = Paint.Style.FILL
strokeWidth = 5f
}
private var viewCenterX: Float = 0f
private var viewCenterY: Float = 0f
private var radius: Float = 0f
override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
super.onSizeChanged(w, h, oldw, oldh)
viewCenterX = w / 2f
viewCenterY = h / 2f
radius = min(w, h) / 2f - 40f // Leave some padding
textPaint.textSize = radius / 6f
cardinalTextPaint.textSize = radius / 4.5f
}
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
// Draw outer circle
canvas.drawCircle(viewCenterX, viewCenterY, radius, rosePaint)
// Draw cardinal and intercardinal points
drawCardinalPoints(canvas)
// Draw tick marks and degree labels
drawDegreeMarks(canvas)
// Draw heading needle
drawHeadingNeedle(canvas, heading, headingNeedlePaint, radius * 0.8f)
// Draw COG arrow
drawCogArrow(canvas, cog, cogArrowPaint, radius * 0.6f)
// Draw current heading text in the center
drawHeadingText(canvas)
}
private fun drawCardinalPoints(canvas: Canvas) {
val cardinalPoints = listOf("N", "E", "S", "W")
val angles = listOf(0f, 90f, 180f, 270f)
val textBound = Rect()
for (i in cardinalPoints.indices) {
val angleRad = Math.toRadians((angles[i] - 90).toDouble()).toFloat() // Adjust for canvas 0deg at 3 o'clock
val x = viewCenterX + (radius * 0.9f) * cos(angleRad)
val y = viewCenterY + (radius * 0.9f) * sin(angleRad)
val text = cardinalPoints[i]
cardinalTextPaint.getTextBounds(text, 0, text.length, textBound)
val textHeight = textBound.height()
canvas.drawText(text, x, y + textHeight / 2, cardinalTextPaint)
}
}
private fun drawDegreeMarks(canvas: Canvas) {
for (i in 0 until 360 step 5) {
val isMajor = (i % 30 == 0) // Major ticks every 30 degrees
val tickLength = if (isMajor) 30f else 15f
val currentTickPaint = if (isMajor) majorTickPaint else minorTickPaint
val startRadius = radius - tickLength
val angleRad = Math.toRadians((i - 90).toDouble()).toFloat() // Adjust for canvas 0deg at 3 o'clock
val startX = viewCenterX + startRadius * cos(angleRad)
val startY = viewCenterY + startRadius * sin(angleRad)
val endX = viewCenterX + radius * cos(angleRad)
val endY = viewCenterY + radius * sin(angleRad)
canvas.drawLine(startX, startY, endX, endY, currentTickPaint)
if (isMajor && i != 0) { // Draw degree labels for major ticks (except North)
val textRadius = radius - tickLength - textPaint.textSize / 2 - 10f
val textX = viewCenterX + textRadius * cos(angleRad)
val textY = viewCenterY + textRadius * sin(angleRad) + textPaint.textSize / 2
canvas.drawText(i.toString(), textX, textY, textPaint)
}
}
}
private fun drawHeadingNeedle(canvas: Canvas, angle: Float, paint: Paint, length: Float) {
val angleRad = Math.toRadians((angle - 90).toDouble()).toFloat() // Adjust for canvas 0deg at 3 o'clock
val endX = viewCenterX + length * cos(angleRad)
val endY = viewCenterY + length * sin(angleRad)
// Draw a simple triangle for the needle
val needleWidth = 20f
val path = android.graphics.Path()
path.moveTo(endX, endY)
path.lineTo(viewCenterX + needleWidth * cos(angleRad - Math.toRadians(90.0).toFloat()),
viewCenterY + needleWidth * sin(angleRad - Math.toRadians(90.0).toFloat()))
path.lineTo(viewCenterX + needleWidth * cos(angleRad + Math.toRadians(90.0).toFloat()),
viewCenterY + needleWidth * sin(angleRad + Math.toRadians(90.0).toFloat()))
path.close()
canvas.drawPath(path, paint)
}
private fun drawCogArrow(canvas: Canvas, angle: Float, paint: Paint, length: Float) {
val angleRad = Math.toRadians((angle - 90).toDouble()).toFloat() // Adjust for canvas 0deg at 3 o'clock
val endX = viewCenterX + length * cos(angleRad)
val endY = viewCenterY + length * sin(angleRad)
val startX = viewCenterX + (length * 0.5f) * cos(angleRad)
val startY = viewCenterY + (length * 0.5f) * sin(angleRad)
canvas.drawLine(startX, startY, endX, endY, paint)
// Draw arrow head
val arrowHeadLength = 25f
val arrowHeadWidth = 15f
val arrowPath = android.graphics.Path()
arrowPath.moveTo(endX, endY)
arrowPath.lineTo(endX - arrowHeadLength * cos(angleRad - Math.toRadians(30.0).toFloat()),
endY - arrowHeadLength * sin(angleRad - Math.toRadians(30.0).toFloat()))
arrowPath.moveTo(endX, endY)
arrowPath.lineTo(endX - arrowHeadLength * cos(angleRad + Math.toRadians(30.0).toFloat()),
endY - arrowHeadLength * sin(angleRad + Math.toRadians(30.0).toFloat()))
canvas.drawPath(arrowPath, paint)
}
private fun drawHeadingText(canvas: Canvas) {
val headingText = "${heading.toInt()}°" + if (isTrueHeading) "T" else "M"
textPaint.color = Color.WHITE
textPaint.textSize = radius / 3.5f // Larger text for main heading
canvas.drawText(headingText, viewCenterX, viewCenterY + textPaint.textSize / 3, textPaint)
}
/**
* Sets the current heading to display.
* @param newHeading The new heading value in degrees (0-359).
* @param isTrue Whether the heading is True (magnetic variation applied) or Magnetic.
*/
fun setHeading(newHeading: Float, isTrue: Boolean) {
this.heading = newHeading
this.isTrueHeading = isTrue
invalidate()
}
/**
* Sets the Course Over Ground (COG) to display.
* @param newCog The new COG value in degrees (0-359).
*/
fun setCog(newCog: Float) {
this.cog = newCog
invalidate()
}
}
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