qt qml 图表显示

在chartview 显示带时间刻度的曲线

源码

import QtQuick 2.10

import QtQuick.Window 2.10

import QtCharts 2.0

Window {

    visible: true

    width: 640

    height: 480

    title: qsTr("Hello World")

    ChartView

    {

        anchors.fill: parent

        id:chart

        DateTimeAxis

        {

            format: "yyyy-MM-dd HH:mm mm:ss"; //"yyyy MMM dd";HH:mm mm:ss

            id:thex

         //   tickCount: 6

        }

        ValueAxis

        {

            max: 1

            min: -1

            id:theY

        }

        LineSeries

        {

            name:"测试"

            axisX: thex

            axisY: theY

        }

    }

    Component.onCompleted:

    {

        var p = Math.PI/512;

        var t = new Date();

        thex.min = t;

        var t2 = new Date();

        t2.setHours(t2.getHours()+1024);

        thex.max = t2;

        for(var i = 0; i< 1024; i++)

        {

            t.setHours(t.getHours() + 1);

            chart.series(0).append(t.getTime(),Math.sin( i*p));

        }

    }

}