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/*
* Copyright (C) 2023 Arseniy Movshev <dodoradio@outlook.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
import QtQuick 2.15
import org.asteroid.controls 1.0
Item {
id: root
property real startValue: 0
property real endValue: 0
property int minLabels: 3
property int maxLabels: 8
property real valueDivisionsInterval: 0
property real startValueDivision: 0
property real valuesDelta
onStartValueChanged: update()
onEndValueChanged: update()
onMinLabelsChanged: update()
onMaxLabelsChanged: update()
function update() { // this tries to guess how to generate nice looking labels
valuesDelta = endValue - startValue
var powTen = Math.pow(10,Math.trunc(Math.log10(valuesDelta)))
var interval = powTen
var numLabel = Math.floor(valuesDelta/interval)
if (numLabel > maxLabels) {
interval = powTen*2
numLabel = valuesDelta/interval
if (numLabel > maxLabels) {
interval = powTen*5
numLabel = valuesDelta/interval
if (numLabel > maxLabels) {
interval = powTen*10
numLabel = valuesDelta/interval
}
}
}
if (numLabel < minLabels) {
interval = powTen/2
numLabel = valuesDelta/interval
if (numLabel < minLabels) {
interval = powTen/5
numLabel = valuesDelta/interval
if (numLabel < minLabels) {
interval = powTen/10
numLabel = valuesDelta/interval
}
}
}
valueDivisionsInterval = interval
labelsRepeater.model = Math.round(numLabel) + 1
startValueDivision = powTen*Math.trunc(startValue/powTen)
}
Repeater {
id: labelsRepeater
delegate: Label {
anchors.right: parent.right
property real value: root.startValueDivision + root.valueDivisionsInterval*index
text: value > 1000 ? value/1000 + "k" : value
font.pixelSize: Dims.w(5)
y: parent.height - (parent.height)*(value/root.valuesDelta) - height/2
verticalAlignment: Text.AlignVCenter
}
}
}
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