Viz title
package com.sogeti.quantumleap.uielements
import android.content.Context
import android.view.ViewGroup
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.viewinterop.AndroidView
import io.data2viz.charts.chart.Chart
import io.data2viz.charts.chart.chart
import io.data2viz.charts.chart.discrete
import io.data2viz.charts.chart.mark.bar
import io.data2viz.charts.chart.quantitative
import io.data2viz.geom.Size
import io.data2viz.random.RandomDistribution
import io.data2viz.viz.VizContainerView
import kotlin.random.Random
// Data class to represent population counts
data class PopCount(val year: Int, val population: Double)
// Composable function to display the chart
@Composable
fun Data2VizChart(
modifier: Modifier = Modifier,
maxYValue: Double = 8000.0, // Default maximum Y value
barCount: Int = 30, // Default number of bars
data: List<PopCount> = generateRandomData(barCount, maxYValue) // Generate random data
) {
AndroidView(
modifier = modifier,
factory = { context ->
CanadaChart(context).apply {
layoutParams = ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT
)
}
},
update = { view ->
view.updateChartData(data)
}
)
}
// Utility function to generate random data
fun generateRandomData(barCount: Int, maxYValue: Double): List<PopCount> {
val generator = RandomDistribution.uniform(max = maxYValue)
return List(barCount) { index ->
PopCount(index, generator().toDouble())
}
}
class CanadaChart(context: Context) : VizContainerView(context) {
// Current data of the chart
private var currentData: List<PopCount> = listOf()
// Initially create the chart with the current data and a size of 0.0 by 0.0
var chart: Chart<PopCount> = createChart(currentData, Size(0.0, 0.0))
// This method will create a chart with given data and size
private fun createChart(data: List<PopCount>, size: Size): Chart<PopCount> {
return chart(data) {
this.size = size
title = "Population of Canada 1851–2001 (Statistics Canada)"
val year = discrete({ domain.year })
val population = quantitative({ domain.population }) {
name = "Population (millions)"
}
bar(year, population)
}
}
// Call this method to update the chart data
fun updateChartData(newData: List<PopCount>) {
currentData = newData
chart = createChart(newData, Size(width.toDouble(), height.toDouble()))
invalidate()
}
override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
super.onSizeChanged(w, h, oldw, oldh)
// Update the chart with the new size
chart = createChart(currentData, Size(w.toDouble(), h.toDouble()))
invalidate()
}
}
Sketch created by
anon
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