@nativescript-community/ui-chart/renderer/BarLineScatterCandleBubbleRenderer.js

A powerful chart / graph plugin, supporting line, bar, pie, radar, bubble, and candlestick charts as well as scaling, panning and animations.

import { Rounding } from '../data/DataSet';
import { DataRenderer } from './DataRenderer';
/**
 * Class representing the bounds of the current viewport in terms of indices in the values array of a DataSet.
 */
export class XBounds {
    /**
     * Calculates the minimum and maximum x values as well as the range between them.
     *
     * @param chart
     * @param dataSet
     */
    set(chart, dataSet, animator) {
        const phaseX = Math.max(0, Math.min(1, animator.phaseX));
        const low = chart.lowestVisibleX;
        const high = chart.highestVisibleX;
        const entryFrom = dataSet.getEntryForXValue(low, NaN, Rounding.DOWN);
        const entryTo = dataSet.getEntryForXValue(high, NaN, Rounding.UP);
        this.min = entryFrom ? dataSet.getEntryIndex(entryFrom) : 0;
        this.max = entryTo ? dataSet.getEntryIndex(entryTo) : 0;
        this.range = (this.max - this.min) * phaseX;
    }
}
/**
 * Created by Philipp Jahoda on 09/06/16.
 */
export class BarLineScatterCandleBubbleRenderer extends DataRenderer {
    constructor(animator, viewPortHandler) {
        super(animator, viewPortHandler);
        /**
         * buffer for storing the current minimum and maximum visible x
         */
        this.mXBounds = new XBounds();
    }
    /**
     * Returns true if the DataSet values should be drawn, false if not.
     *
     * @param set
     * @return
     */
    shouldDrawValues(set) {
        return set.visible && (set.drawValuesEnabled || set.drawIconsEnabled);
    }
    /**
     * Checks if the provided entry object is in bounds for drawing considering the current animation phase.
     *
     * @param e
     * @param set
     * @return
     */
    isInBoundsX(e, set) {
        if (!e)
            return false;
        const entryIndex = set.getEntryIndex(e);
        if (!e || entryIndex >= set.entryCount * this.animator.phaseY) {
            return false;
        }
        else {
            return true;
        }
    }
}
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