How to Dynamically Load Candlesticks in QML

Kiovtorov

Does someone have a working example of dynamically loading candlesticks because I have tried numerous variants but none of them worked

import QtQuick
import QtCharts
import QtQuick.Controls

Window {
    id: root
    visible: true
    width: 800
    height: 600

    ChartView {
        id: chart
        anchors.fill: parent
        title: "Candlestick Chart Example"
        antialiasing: true

        CandlestickSeries {
            id: candleSeries
            name: "Stock Data"
            increasingColor: "green"
            decreasingColor: "red"
        }
    }

    Button {
        text: "Add Candlestick"
        anchors.bottom: parent.bottom
        anchors.horizontalCenter: parent.horizontalCenter
        onClicked: root.addCandlestick()
        background: Rectangle
        {
            color: "black"
        }
    }

    function addCandlestick() {
        let open = Math.random() * 100 + 50;
        let high = open + Math.random() * 10;
        let low = open - Math.random() * 10;
        let close = low + Math.random() * (high - low);

        // Create a CandlestickSet instance using the correct method
        let set = Qt.createQmlObject(`
            import QtCharts 2.15;
            CandlestickSet {
                timestamp: ` + Date.now() + `;
                open: ` + open + `;
                high: ` + high + `;
                low: ` + low + `;
                close: ` + close + `;
            }
        `, candleSeries);

        candleSeries.append(set);
    }
}

or

    function addCandlestick() {
        let open = Math.random() * 100 + 50;
        let high = open + Math.random() * 10;
        let low = open - Math.random() * 10;
        let close = low + Math.random() * (high - low);

        let candlestick = Qt.createComponent("QtCharts.CandlestickSet");
        let set = candlestick.createObject(candleSeries, { timestamp: Date.now(), open, high, low, close });

        candleSeries.append(set);
    }

etc...

Bob64

I wonder if there is a bug in Qt. In the debugger I see count go up on candleSeries each time a CandlestickSet is added, but like you I see nothing on the chart. (I am using Qt 5.15 - so this doesn't seem to be an issue with specific versions.)