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BoxplotGeom.kt
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BoxplotGeom.kt
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/*
* Copyright (c) 2023. JetBrains s.r.o.
* Use of this source code is governed by the MIT license that can be found in the LICENSE file.
*/
package org.jetbrains.letsPlot.core.plot.base.geom
import org.jetbrains.letsPlot.commons.geometry.DoubleRectangle
import org.jetbrains.letsPlot.commons.geometry.DoubleVector
import org.jetbrains.letsPlot.core.plot.base.*
import org.jetbrains.letsPlot.core.plot.base.geom.util.BarTooltipHelper
import org.jetbrains.letsPlot.core.plot.base.geom.util.BoxHelper
import org.jetbrains.letsPlot.core.plot.base.geom.util.GeomHelper
import org.jetbrains.letsPlot.core.plot.base.geom.util.GeomUtil.extendHeight
import org.jetbrains.letsPlot.core.plot.base.geom.util.HintColorUtil.colorWithAlpha
import org.jetbrains.letsPlot.core.plot.base.render.LegendKeyElementFactory
import org.jetbrains.letsPlot.core.plot.base.render.SvgRoot
import org.jetbrains.letsPlot.core.plot.base.tooltip.TipLayoutHint
class BoxplotGeom : GeomBase() {
var fattenMidline: Double = DEF_FATTEN_MIDLINE
var whiskerWidth: Double = DEF_WHISKER_WIDTH
override val legendKeyElementFactory: LegendKeyElementFactory
get() = LEGEND_FACTORY
override fun buildIntern(
root: SvgRoot,
aesthetics: Aesthetics,
pos: PositionAdjustment,
coord: CoordinateSystem,
ctx: GeomContext
) {
val geomHelper = GeomHelper(pos, coord, ctx)
BoxHelper.buildBoxes(
root, aesthetics, pos, coord, ctx,
clientRectByDataPoint(ctx, geomHelper, isHintRect = false)
)
buildLines(root, aesthetics, ctx, geomHelper)
BarTooltipHelper.collectRectangleTargets(
listOf(Aes.YMAX, Aes.UPPER, Aes.MIDDLE, Aes.LOWER, Aes.YMIN),
aesthetics, pos, coord, ctx,
clientRectByDataPoint(ctx, geomHelper, isHintRect = true),
{ colorWithAlpha(it) },
defaultTooltipKind = TipLayoutHint.Kind.CURSOR_TOOLTIP
)
}
private fun buildLines(
root: SvgRoot,
aesthetics: Aesthetics,
ctx: GeomContext,
geomHelper: GeomHelper
) {
BoxHelper.buildMidlines(
root,
aesthetics,
xAes = Aes.X,
middleAes = Aes.MIDDLE,
sizeAes = Aes.WIDTH,
ctx,
geomHelper,
fatten = fattenMidline,
flip = false
)
val elementHelper = geomHelper.createSvgElementHelper()
for (p in aesthetics.dataPoints()) {
val x = p.finiteOrNull(Aes.X) ?: continue
val width = p.finiteOrNull(Aes.WIDTH) ?: 0.0
val halfWidth = width * ctx.getResolution(Aes.X) / 2
val halfFenceWidth = halfWidth * whiskerWidth
// lower whisker
p.finiteOrNull(Aes.LOWER, Aes.YMIN)?.let { (hinge, fence) ->
// whisker line
root.add(
elementHelper.createLine(
DoubleVector(x, hinge),
DoubleVector(x, fence),
p
)!!.first
)
// fence line
root.add(
elementHelper.createLine(
DoubleVector(x - halfFenceWidth, fence),
DoubleVector(x + halfFenceWidth, fence),
p
)!!.first
)
}
// upper whisker
p.finiteOrNull(Aes.UPPER, Aes.YMAX)?.let { (hinge, fence) ->
// whisker line
root.add(
elementHelper.createLine(
DoubleVector(x, hinge),
DoubleVector(x, fence),
p
)!!.first
)
// fence line
root.add(
elementHelper.createLine(
DoubleVector(x - halfFenceWidth, fence),
DoubleVector(x + halfFenceWidth, fence),
p
)!!.first
)
}
}
}
companion object {
const val DEF_FATTEN_MIDLINE = 2.0
const val DEF_WHISKER_WIDTH = 0.5
const val HANDLES_GROUPS = false
private val LEGEND_FACTORY = BoxHelper.legendFactory(true)
private fun clientRectByDataPoint(
ctx: GeomContext,
geomHelper: GeomHelper,
isHintRect: Boolean
): (DataPointAesthetics) -> DoubleRectangle? {
fun factory(p: DataPointAesthetics): DoubleRectangle? {
val x = p.finiteOrNull(Aes.X) ?: return null
val lower = p.finiteOrNull(Aes.LOWER) ?: return null
val upper = p.finiteOrNull(Aes.UPPER) ?: return null
val w = p.finiteOrNull(Aes.WIDTH) ?: return null
val width = w * ctx.getResolution(Aes.X)
val rect = DoubleRectangle.XYWH(x - width / 2, lower, width, upper - lower)
return geomHelper.toClient(rect, p)?.let {
if (isHintRect && upper == lower) {
// Add tooltips for geom_boxplot with zero height (issue #563)
extendHeight(it, 2.0, ctx.flipped)
} else {
it
}
}
}
return ::factory
}
}
}