react-native-chart-kit/dist/v2/react-native/viewport/config.js

Beautiful React Native charts for dashboards, reports, and data-rich mobile apps.

const defaultMinPanDistance = 6;
const defaultMinVisiblePoints = 6;
const defaultPinchSensitivity = 1;
const normalizeFiniteNumber = (value, fallback, min) => typeof value === "number" && Number.isFinite(value)
    ? Math.max(min, value)
    : fallback;
const normalizePositiveInteger = (value, fallback, min) => Math.floor(normalizeFiniteNumber(value, fallback, min));
export const resolveChartViewportInteractionConfig = (viewportInteraction) => {
    if (!viewportInteraction) {
        return {
            lockParentScroll: true,
            maxVisiblePoints: undefined,
            minPanDistance: defaultMinPanDistance,
            minVisiblePoints: defaultMinVisiblePoints,
            onGestureEnd: undefined,
            onGestureStart: undefined,
            pan: false,
            pinchSensitivity: defaultPinchSensitivity,
            pinchZoom: false
        };
    }
    if (viewportInteraction === true) {
        return {
            lockParentScroll: true,
            maxVisiblePoints: undefined,
            minPanDistance: defaultMinPanDistance,
            minVisiblePoints: defaultMinVisiblePoints,
            onGestureEnd: undefined,
            onGestureStart: undefined,
            pan: true,
            pinchSensitivity: defaultPinchSensitivity,
            pinchZoom: false
        };
    }
    return {
        lockParentScroll: viewportInteraction.lockParentScroll !== false,
        maxVisiblePoints: typeof viewportInteraction.maxVisiblePoints === "number" &&
            Number.isFinite(viewportInteraction.maxVisiblePoints)
            ? Math.max(2, Math.floor(viewportInteraction.maxVisiblePoints))
            : undefined,
        minPanDistance: typeof viewportInteraction.minPanDistance === "number" &&
            Number.isFinite(viewportInteraction.minPanDistance)
            ? Math.max(0, viewportInteraction.minPanDistance)
            : defaultMinPanDistance,
        minVisiblePoints: normalizePositiveInteger(viewportInteraction.minVisiblePoints, defaultMinVisiblePoints, 2),
        onGestureEnd: viewportInteraction.onGestureEnd,
        onGestureStart: viewportInteraction.onGestureStart,
        pan: viewportInteraction.pan !== false,
        pinchSensitivity: normalizeFiniteNumber(viewportInteraction.pinchSensitivity, defaultPinchSensitivity, 0.1),
        pinchZoom: viewportInteraction.pinchZoom === true
    };
};
export const getChartViewportPanDeltaPoints = ({ currentLocationX, plotWidth, startLocationX, visibleCount }) => {
    const safePlotWidth = Number.isFinite(plotWidth) && plotWidth > 0 ? plotWidth : 1;
    const pointSpacing = safePlotWidth / Math.max(1, visibleCount - 1);
    return Math.round((startLocationX - currentLocationX) / pointSpacing);
};
export const getChartViewportPinchZoomFactor = ({ scale, sensitivity }) => {
    const safeScale = typeof scale === "number" && Number.isFinite(scale)
        ? Math.max(0.05, scale)
        : 1;
    const safeSensitivity = normalizeFiniteNumber(sensitivity, defaultPinchSensitivity, 0.1);
    return Math.pow(safeScale, safeSensitivity);
};