commonMain.jetbrains.datalore.plot.base.geom.LineRangeGeom.kt Maven / Gradle / Ivy

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/*
 * Copyright (c) 2020. JetBrains s.r.o.
 * Use of this source code is governed by the MIT license that can be found in the LICENSE file.
 */

package jetbrains.datalore.plot.base.geom

import jetbrains.datalore.base.geometry.DoubleRectangle
import jetbrains.datalore.base.geometry.DoubleVector
import jetbrains.datalore.plot.base.*
import jetbrains.datalore.plot.base.aes.AesScaling
import jetbrains.datalore.plot.base.geom.util.BarTooltipHelper
import jetbrains.datalore.plot.base.geom.util.GeomHelper
import jetbrains.datalore.plot.base.geom.util.GeomUtil
import jetbrains.datalore.plot.base.geom.util.GeomUtil.extendTrueWidth
import jetbrains.datalore.plot.base.geom.util.HintColorUtil
import jetbrains.datalore.plot.base.render.LegendKeyElementFactory
import jetbrains.datalore.plot.base.render.SvgRoot
import kotlin.math.max

class LineRangeGeom : GeomBase() {

    override val legendKeyElementFactory: LegendKeyElementFactory
        get() = VLineGeom.LEGEND_KEY_ELEMENT_FACTORY

    override fun buildIntern(
        root: SvgRoot,
        aesthetics: Aesthetics,
        pos: PositionAdjustment,
        coord: CoordinateSystem,
        ctx: GeomContext
    ) {
        val geomHelper = GeomHelper(pos, coord, ctx)
        val helper = geomHelper.createSvgElementHelper()
        val colorsByDataPoint = HintColorUtil.createColorMarkerMapper(GeomKind.LINE_RANGE, ctx)
        for (p in GeomUtil.withDefined(aesthetics.dataPoints(), Aes.X, Aes.YMIN, Aes.YMAX)) {
            val x = p.x()!!
            val ymin = p.ymin()!!
            val ymax = p.ymax()!!

            val start = DoubleVector(x, ymin)
            val end = DoubleVector(x, ymax)
            val line = helper.createLine(start, end, p)
            if (line != null) {
                root.add(line)
            }
        }

        BarTooltipHelper.collectRectangleTargets(
            listOf(Aes.YMAX, Aes.YMIN),
            aesthetics, pos, coord, ctx,
            clientRectByDataPoint(ctx, geomHelper),
            { HintColorUtil.colorWithAlpha(it) },
            colorMarkerMapper = colorsByDataPoint
        )
    }

    companion object {
        const val HANDLES_GROUPS = false

        private fun clientRectByDataPoint(ctx: GeomContext, geomHelper: GeomHelper): (DataPointAesthetics) -> DoubleRectangle? {
            return { p ->
                if (p.defined(Aes.X) &&
                    p.defined(Aes.YMIN) &&
                    p.defined(Aes.YMAX)
                ) {
                    val x = p.x()!!
                    val ymin = p.ymin()!!
                    val ymax = p.ymax()!!
                    val height = ymax - ymin

                    val rect = geomHelper.toClient(
                        DoubleRectangle(DoubleVector(x, ymax - height / 2), DoubleVector.ZERO),
                        p
                    )!!
                    val width = max(AesScaling.strokeWidth(p), 2.0)
                    extendTrueWidth(rect, width, ctx)
                } else {
                    null
                }
            }
        }
    }
}