commonMain.com.aay.compose.baseComponents.YAxisDrawing.kt Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of chart Show documentation

Multiplatform library for desktop and android

The newest version!

package com.aay.compose.baseComponents

import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.graphics.drawscope.DrawScope
import androidx.compose.ui.graphics.nativeCanvas
import androidx.compose.ui.text.ExperimentalTextApi
import androidx.compose.ui.text.TextMeasurer
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.drawText
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.times
import com.aay.compose.utils.formatToThousandsMillionsBillions

@OptIn(ExperimentalTextApi::class)
internal fun DrawScope.yAxisDrawing(
    upperValue: Float, lowerValue: Float,
    textMeasure: TextMeasurer,
    spacing: Dp,
    yAxisStyle: TextStyle,
    yAxisRange: Int,
    specialChart: Boolean,
    isFromBarChart: Boolean,
) {
    if (specialChart) {
        return
    }
    val dataRange = if (isFromBarChart) upperValue else upperValue - lowerValue
    val dataStep = dataRange / yAxisRange

    (0..yAxisRange).forEach { i ->
        val yValue = if (isFromBarChart) {
            dataStep * i
        } else {
            lowerValue + dataStep * i
        }

        val y = (size.height.toDp() - spacing - i * (size.height.toDp() - spacing) / yAxisRange)
        drawContext.canvas.nativeCanvas.apply {
            drawText(
                textMeasurer = textMeasure,
                text = yValue.formatToThousandsMillionsBillions(),
                style = yAxisStyle,
                topLeft = Offset(0f, y.toPx())
            )
        }
    }
}