mirror of
https://github.com/meshtastic/Meshtastic-Android.git
synced 2026-04-20 22:23:37 +00:00
06bf9e5ecd
* The battery line is only drawn from point to point when we don't have a significant break in time. * Implemented GraphUtil.plotPoint * Implemented GraphUtil.createPath * Added licence to GraphUtil.kt.
105 lines
3.5 KiB
Kotlin
105 lines
3.5 KiB
Kotlin
/*
|
|
* Copyright (c) 2024 Meshtastic LLC
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package com.geeksville.mesh.util
|
|
|
|
import androidx.compose.ui.graphics.Path
|
|
import androidx.compose.ui.geometry.Offset
|
|
import androidx.compose.ui.graphics.Color
|
|
import androidx.compose.ui.graphics.drawscope.DrawContext
|
|
import com.geeksville.mesh.TelemetryProtos.Telemetry
|
|
import java.util.concurrent.TimeUnit
|
|
|
|
private const val TIME_SEPARATION_THRESHOLD = 2L
|
|
|
|
object GraphUtil {
|
|
|
|
/**
|
|
* @param value Must be zero-scaled before passing.
|
|
* @param divisor The range for the data set.
|
|
*/
|
|
fun plotPoint(
|
|
drawContext: DrawContext,
|
|
color: Color,
|
|
radius: Float,
|
|
x: Float,
|
|
value: Float,
|
|
divisor: Float,
|
|
) {
|
|
val height = drawContext.size.height
|
|
val ratio = value / divisor
|
|
val y = height - (ratio * height)
|
|
drawContext.canvas.drawCircle(
|
|
center = Offset(x, y),
|
|
radius = radius,
|
|
paint = androidx.compose.ui.graphics.Paint().apply { this.color = color }
|
|
)
|
|
}
|
|
|
|
/**
|
|
* Creates a [Path] that could be used to draw a line from the `index` to the end of `telemetries`
|
|
* or the last point before a time separation between [Telemetry]s.
|
|
*
|
|
* @param telemetries data used to create the [Path]
|
|
* @param index current place in the [List]
|
|
* @param path [Path] that will be used to draw
|
|
* @param timeRange The time range for the data set
|
|
* @param width of the [DrawContext]
|
|
* @param calculateY (`index`) -> `y` coordinate
|
|
*/
|
|
fun createPath(
|
|
telemetries: List<Telemetry>,
|
|
index: Int,
|
|
path: Path,
|
|
oldestTime: Int,
|
|
timeRange: Int,
|
|
width: Float,
|
|
calculateY: (Int) -> Float
|
|
): Int {
|
|
var i = index
|
|
var isNewLine = true
|
|
with(path) {
|
|
while (i < telemetries.size) {
|
|
val telemetry = telemetries[i]
|
|
val nextTelemetry = telemetries.getOrNull(i + 1) ?: telemetries.last()
|
|
|
|
/* Check to see if we have a significant time break between telemetries. */
|
|
if (nextTelemetry.time - telemetry.time > TimeUnit.HOURS.toSeconds(TIME_SEPARATION_THRESHOLD)) {
|
|
i++
|
|
break
|
|
}
|
|
|
|
val x1Ratio = (telemetry.time - oldestTime).toFloat() / timeRange
|
|
val x1 = x1Ratio * width
|
|
val y1 = calculateY(i)
|
|
|
|
val x2Ratio = (nextTelemetry.time - oldestTime).toFloat() / timeRange
|
|
val x2 = x2Ratio * width
|
|
val y2 = calculateY(i + 1)
|
|
|
|
if (isNewLine || i == 0) {
|
|
isNewLine = false
|
|
moveTo(x1, y1)
|
|
}
|
|
|
|
quadraticTo(x1, y1, (x1 + x2) / 2f, (y1 + y2) / 2f)
|
|
i++
|
|
}
|
|
}
|
|
return i
|
|
}
|
|
}
|