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* [Added] Candle Stick Chart
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45 changes: 45 additions & 0 deletions
45
app/src/main/java/com/himanshoe/charty/ui/CandleStickChartDemo.kt
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| @@ -0,0 +1,45 @@ | ||
| package com.himanshoe.charty.ui | ||
|
|
||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.height | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.unit.dp | ||
| import com.himanshoe.charty.candle.CandleStickChart | ||
| import com.himanshoe.charty.candle.model.CandleEntry | ||
|
|
||
| val candleDummyData = listOf( | ||
| CandleEntry(49151.66f, 48899.99f, 49000f, 49058.67f), | ||
| CandleEntry(49146.02f, 48840.84f, 48949.8f, 49000f), | ||
| CandleEntry(49222.54f, 48905.83f, 49157.65f, 48947.89f), | ||
| CandleEntry(49474.09f, 49109.58f, 49335.38f, 49149.15f), | ||
| CandleEntry(49500f, 49277.56f, 49314.68f, 49340.75f), | ||
| CandleEntry(49896.7f, 49252.85f, 49844.7f, 49314.67f), | ||
| CandleEntry(49894.47f, 49760.66f, 49765.13f, 49844.7f), | ||
| CandleEntry(49893.15f, 49604.31f, 49893.15f, 49737.15f), | ||
| CandleEntry(49146.02f, 48840.84f, 48949.8f, 49000f), | ||
| CandleEntry(49222.54f, 48905.83f, 49157.65f, 48947.89f), | ||
| CandleEntry(49474.09f, 49109.58f, 49335.38f, 49149.15f), | ||
| CandleEntry(49500f, 49277.56f, 49314.68f, 49340.75f), | ||
| CandleEntry(49896.7f, 49252.85f, 49844.7f, 49314.67f), | ||
| CandleEntry(49894.47f, 49760.66f, 49765.13f, 49844.7f), | ||
| CandleEntry(49893.15f, 49604.31f, 49893.15f, 49737.15f), | ||
| CandleEntry(49151.66f, 48899.99f, 49000f, 49058.67f), | ||
| CandleEntry(49146.02f, 48840.84f, 48949.8f, 49000f), | ||
| CandleEntry(49222.54f, 48905.83f, 49157.65f, 48947.89f), | ||
| CandleEntry(49474.09f, 49109.58f, 49335.38f, 49149.15f), | ||
| CandleEntry(49500f, 49277.56f, 49314.68f, 49340.75f), | ||
| CandleEntry(49896.7f, 49252.85f, 49844.7f, 49314.67f), | ||
| CandleEntry(49894.47f, 49760.66f, 49765.13f, 49844.7f), | ||
| CandleEntry(49893.15f, 49604.31f, 49893.15f, 49737.15f), | ||
| ) | ||
|
|
||
| @Composable | ||
| fun CandleStickChartDemo() { | ||
| CandleStickChart( | ||
| modifier = Modifier | ||
| .fillMaxWidth() | ||
| .height(300.dp), | ||
| candleEntryData = candleDummyData, | ||
| ) | ||
| } |
131 changes: 131 additions & 0 deletions
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charty/src/main/java/com/himanshoe/charty/candle/CandleStickChart.kt
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| package com.himanshoe.charty.candle | ||
|
|
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| import android.graphics.Typeface | ||
| import androidx.compose.animation.core.Animatable | ||
| import androidx.compose.animation.core.FastOutLinearInEasing | ||
| import androidx.compose.animation.core.tween | ||
| import androidx.compose.foundation.Canvas | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.draw.drawBehind | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.graphics.Paint | ||
| import androidx.compose.ui.graphics.Path | ||
| import androidx.compose.ui.graphics.drawscope.Stroke | ||
| import androidx.compose.ui.graphics.drawscope.drawIntoCanvas | ||
| import androidx.compose.ui.graphics.nativeCanvas | ||
| import androidx.compose.ui.graphics.toArgb | ||
| import androidx.compose.ui.unit.dp | ||
| import com.himanshoe.charty.candle.config.CandleStickConfig | ||
| import com.himanshoe.charty.candle.config.CandleStickDefaults | ||
| import com.himanshoe.charty.candle.model.CandleEntry | ||
| import com.himanshoe.charty.common.axis.AxisConfig | ||
| import com.himanshoe.charty.common.axis.AxisConfigDefaults | ||
| import com.himanshoe.charty.common.axis.yAxis | ||
|
|
||
| @Composable | ||
| fun CandleStickChart( | ||
| candleEntryData: List<CandleEntry>, | ||
| modifier: Modifier = Modifier, | ||
| axisConfig: AxisConfig = AxisConfigDefaults.axisConfigDefaults(), | ||
| candleStickConfig: CandleStickConfig = CandleStickDefaults.candleStickDefaults() | ||
| ) { | ||
| val x = remember { Animatable(0f) } | ||
| val maxYValue = candleEntryData.maxOf { it.high } | ||
| val targetValue = if (candleStickConfig.totalCandles == 0) candleEntryData.count() | ||
| .toFloat() else candleStickConfig.totalCandles.toFloat() | ||
|
|
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| LaunchedEffect(true) { | ||
| x.animateTo( | ||
| targetValue = targetValue, | ||
| animationSpec = tween( | ||
| durationMillis = if (candleStickConfig.shouldAnimateCandle) 3000 else 0, | ||
| easing = FastOutLinearInEasing | ||
| ), | ||
| ) | ||
| } | ||
| val hasPadding = axisConfig.showAxis | ||
| Canvas( | ||
| modifier = modifier | ||
| .padding( | ||
| start = if (hasPadding) 40.dp else 10.dp, | ||
| top = if (hasPadding) 20.dp else 0.dp | ||
| ) | ||
| .drawBehind { | ||
| if (axisConfig.showAxis) { | ||
| yAxis(axisConfig, maxYValue, true) | ||
| } | ||
| } | ||
| .padding(start = if (hasPadding) 20.dp else 0.dp) | ||
|
|
||
| ) { | ||
| val xBounds = Pair(0f, candleEntryData.count().toFloat()) | ||
| val yBounds = getBounds(candleEntryData) | ||
| val scaleX = size.width.div(xBounds.second.minus(xBounds.first)) | ||
| val scaleY = size.height.div(yBounds.second.minus(yBounds.first)) | ||
| val yMove = yBounds.first.times(scaleY) | ||
| val interval = (0.rangeTo(kotlin.math.min(candleEntryData.size.minus(1), x.value.toInt()))) | ||
| val last = interval.last() | ||
|
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| interval.forEach { value -> | ||
| val xPoint = value.times(scaleX) | ||
| val yPointH = (size.height.minus(candleEntryData[value].high.times(scaleY))).plus(yMove) | ||
| val yPointL = (size.height.minus(candleEntryData[value].low.times(scaleY))).plus(yMove) | ||
| val yPointO = (size.height.minus(candleEntryData[value].opening.times(scaleY))).plus(yMove) | ||
| val yPointC = (size.height.minus(candleEntryData[value].closing.times(scaleY))).plus(yMove) | ||
| val path1 = Path() | ||
| val path2 = Path() | ||
| val isPositive = candleEntryData[value].opening <= candleEntryData[value].closing | ||
| val candleColor = if (isPositive) candleStickConfig.positiveColor else candleStickConfig.negativeColor | ||
| val candleLineColor = if (isPositive) candleStickConfig.positiveCandleLineColor else candleStickConfig.negativeCandleLineColor | ||
|
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| path1.moveTo(xPoint, yPointH) | ||
| path1.lineTo(xPoint, yPointL) | ||
| drawPath( | ||
| path = path1, | ||
| color = candleLineColor, | ||
| style = Stroke(candleStickConfig.highLowLineWidth) | ||
| ) | ||
|
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| path2.moveTo(xPoint, yPointO) | ||
| path2.lineTo(xPoint, yPointC) | ||
| drawPath( | ||
| path = path2, | ||
| color = candleColor, | ||
| style = Stroke(scaleX.minus(scaleX.div(8))) | ||
| ) | ||
| } | ||
|
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| if (candleStickConfig.showPriceText) { | ||
| drawIntoCanvas { | ||
| it.nativeCanvas.drawText( | ||
| candleEntryData[last].closing.toString(), | ||
| (last * scaleX) + 50f, // x-coordinates of the origin (top left) | ||
| size.height - (candleEntryData[last].closing * scaleY) + yMove + 20f, // y-coordinates of the origin (top left) | ||
| textPaint(candleStickConfig.textColor, size.width.div(30)) | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| private fun textPaint(textColor: Color = Color.Blue, textSizeValue: Float) = | ||
| Paint().asFrameworkPaint().apply { | ||
| isAntiAlias = true | ||
| textSize = textSizeValue | ||
| color = textColor.toArgb() | ||
| typeface = Typeface.create(Typeface.MONOSPACE, Typeface.BOLD) | ||
| } | ||
|
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| private fun getBounds(candleEntryList: List<CandleEntry>): Pair<Float, Float> { | ||
| var min = Float.MAX_VALUE | ||
| var max = -Float.MAX_VALUE | ||
| candleEntryList.forEach { | ||
| min = min.coerceAtMost(it.low) | ||
| max = max.coerceAtLeast(it.high) | ||
| } | ||
| return Pair(min, max) | ||
| } |
25 changes: 25 additions & 0 deletions
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charty/src/main/java/com/himanshoe/charty/candle/config/CandleStickConfig.kt
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| @@ -0,0 +1,25 @@ | ||
| package com.himanshoe.charty.candle.config | ||
|
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| import androidx.compose.ui.graphics.Color | ||
|
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| data class CandleStickConfig( | ||
| val positiveColor: Color, | ||
| val negativeColor: Color, | ||
| val positiveCandleLineColor: Color = positiveColor, | ||
| val negativeCandleLineColor: Color = negativeColor, | ||
| val textColor: Color, | ||
| val shouldAnimateCandle: Boolean = true, | ||
| val showPriceText: Boolean = true, | ||
| val highLowLineWidth: Float, | ||
| val totalCandles: Int = 0 | ||
| ) | ||
|
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| internal object CandleStickDefaults { | ||
|
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| fun candleStickDefaults() = CandleStickConfig( | ||
| positiveColor = Color.Green, | ||
| negativeColor = Color.Red, | ||
| textColor = Color.Black, | ||
| highLowLineWidth = 4f | ||
| ) | ||
| } |
8 changes: 8 additions & 0 deletions
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charty/src/main/java/com/himanshoe/charty/candle/model/CandleEntry.kt
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| @@ -0,0 +1,8 @@ | ||
| package com.himanshoe.charty.candle.model | ||
|
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| data class CandleEntry( | ||
| val high: Float, | ||
| val low: Float, | ||
| val opening: Float, | ||
| val closing: Float | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| ## CandleStickChart | ||
|
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| > A candlestick chart is a style of financial chart used to describe price movements of a security, derivative, or currency. | ||
| ### Using CandleStickChart in your project: | ||
|
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| ```kotlin | ||
| CandleStickChart( | ||
| candleEntryData = // list of CandleEntry, | ||
| modifier = Modifier, | ||
| ) | ||
| ``` | ||
|
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| ### Creating Data Set: | ||
|
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| to create a data set you need to pass List of `CandleEntry`, where `CandleEntry` looks like: | ||
| ```kotlin | ||
| data class CandleEntry( | ||
| val high: Float, | ||
| val low: Float, | ||
| val opening: Float, | ||
| val closing: Float | ||
| ) | ||
| ``` | ||
|
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| ### Additional Configuration (Optional) | ||
| - To edit Config of the Axis, to suit your need to use `AxisConfig` | ||
| - To edit Individual Bar config of it having corner radius you need to use `BarConfig` |