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July 4, 2024 07:44
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| import android.content.Context | |
| import android.graphics.Canvas | |
| import android.graphics.Paint | |
| import android.util.AttributeSet | |
| import android.view.View | |
| class TransparentGridLinesView @JvmOverloads constructor( | |
| context: Context, attrs: AttributeSet? = null, defStyle: Int = 0 | |
| ) : View(context, attrs, defStyle) { | |
| private val blackPaint = Paint().apply { | |
| color = 0xFF000000.toInt() // Black color | |
| strokeWidth = 2f // Set the width of the lines | |
| } | |
| private val grayPaint = Paint().apply { | |
| color = 0xFF888888.toInt() // Gray color | |
| strokeWidth = 2f // Set the width of the lines | |
| } | |
| override fun onDraw(canvas: Canvas) { | |
| super.onDraw(canvas) | |
| val centerX = width / 2f | |
| val centerY = height / 2f | |
| // Grid spacing | |
| val gridSpacing = 50f | |
| // Draw vertical lines from center | |
| var x = centerX | |
| var paint = blackPaint | |
| while (x <= width) { | |
| canvas.drawLine(x, 0f, x, height.toFloat(), paint) | |
| paint = if (paint == blackPaint) grayPaint else blackPaint | |
| x += gridSpacing | |
| } | |
| x = centerX - gridSpacing | |
| paint = grayPaint | |
| while (x >= 0) { | |
| canvas.drawLine(x, 0f, x, height.toFloat(), paint) | |
| paint = if (paint == blackPaint) grayPaint else blackPaint | |
| x -= gridSpacing | |
| } | |
| // Draw horizontal lines from center | |
| var y = centerY | |
| paint = blackPaint | |
| while (y <= height) { | |
| canvas.drawLine(0f, y, width.toFloat(), y, paint) | |
| paint = if (paint == blackPaint) grayPaint else blackPaint | |
| y += gridSpacing | |
| } | |
| y = centerY - gridSpacing | |
| paint = grayPaint | |
| while (y >= 0) { | |
| canvas.drawLine(0f, y, width.toFloat(), y, paint) | |
| paint = if (paint == blackPaint) grayPaint else blackPaint | |
| y -= gridSpacing | |
| } | |
| } | |
| } |
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