通过MouseArea向ChartView添加橡皮圈缩放

import QtQuick 2.15
import QtCharts 2.15

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    ChartView {
        id: chartView
        anchors.fill: parent
        antialiasing: true

        LineSeries {
            id: lineSeries
            XYPoint { x: 0; y: 0 }
            XYPoint { x: 1; y: 2 }
            XYPoint { x: 2; y: 3 }
            // ... 添加更多点 ...
        }
    }

    MouseArea {
        id: mouseArea
        anchors.fill: chartView
        property point startPoint: Qt.point(0, 0)
        property bool dragging: false

        onPressed: {
            dragging = true;
            startPoint = Qt.point(mouse.x, mouse.y);
        }

        onPositionChanged: {
            if (dragging) {
                var dx = mouse.x - startPoint.x;
                var dy = mouse.y - startPoint.y;
                var newXMin = chartView.visibleRange.xMin + dx;
                var newXMax = chartView.visibleRange.xMax + dx;
                var newYMin = chartView.visibleRange.yMin + dy;
                var newYMax = chartView.visibleRange.yMax + dy;

                // 应用橡皮圈缩放
                chartView.zoom(newXMin, newXMax, newYMin, newYMax);
            }
        }

        onReleased: {
            dragging = false;
        }
    }
}