import { FFTResult } from "./fft.mjs";
import { SeismographConfig } from "./seismographconfig.mjs";
import { SeismogramDisplayData } from "./seismogram.mjs";
import { Complex } from "./oregondsputil.mjs";
export declare const SPECTRA_ELEMENT = "sp-spectra";
/**
 * Similar to FFTResult, but used for plotting non-fft generated data.
 * This allows the frequencies to be, for example, evenly distrubuted
 * in log instead of linearly for plotting PolesZeros stages.
 */
export declare class FreqAmp {
    freq: Float32Array;
    values: Array<InstanceType<typeof Complex>>;
    /** optional units of the original data for display purposes. */
    inputUnits: string;
    seismogramDisplayData: null | SeismogramDisplayData;
    constructor(freq: Float32Array, values: Array<InstanceType<typeof Complex>>);
    frequencies(): Float32Array;
    amplitudes(): Float32Array;
    phases(): Float32Array;
    get numFrequencies(): number;
    get minFrequency(): number;
    get maxFrequency(): number;
    get fundamentalFrequency(): number;
}
/**
 * Defualt CSS for styling fft plots.
 */
export declare const spectra_plot_css = "\n:host {\n  display: block\n}\n\ndiv.wrapper {\n  height: 100%;\n  min-height: 100px;\n}\npath.fftpath {\n  stroke: skyblue;\n  fill: none;\n  stroke-width: 1px;\n}\n\nsvg.spectra_plot {\n  height: 100%;\n  width: 100%;\n  min-height: 100px;\n  display: block;\n}\nsvg.spectra_plot text.title {\n  font-size: larger;\n  font-weight: bold;\n  fill: black;\n  color: black;\n}\n\nsvg.spectra_plot text.sublabel {\n  font-size: smaller;\n}\n\n/* links in svg */\nsvg.spectra_plot text a {\n  fill: #0000EE;\n  text-decoration: underline;\n}\n\n";
export declare const AMPLITUDE = "amplitude";
export declare const PHASE = "phase";
export declare const LOGFREQ = "logfreq";
export declare const KIND = "kind";
/**
 * A amplitude or phase plot of fft data. The 'kind' attribute controls whether
 * 'amplitude' or 'phase' is plotted and the 'logfreq' attribute controls
 * whether frequency, x axis, is linear or log.
 * Setting the seismogramConfig changes
 * the plot configuration, althought not all values are used.
 * The data as an array of FFTResult or FreqAmp
 * sets the data to be plotted.
 * Amplitude is plotted with y axis log, phase is y axis linear.
 *
 */
export declare class SpectraPlot extends HTMLElement {
    _seismographConfig: SeismographConfig;
    _fftResults: Array<FFTResult | FreqAmp>;
    constructor(fftResults?: Array<FFTResult | FreqAmp>, seismographConfig?: SeismographConfig);
    get fftResults(): Array<FFTResult | FreqAmp>;
    set fftResults(fftResults: Array<FFTResult | FreqAmp>);
    get seismographConfig(): SeismographConfig;
    set seismographConfig(seismographConfig: SeismographConfig);
    get kind(): string;
    set kind(val: string);
    get logfreq(): boolean;
    set logfreq(val: boolean);
    connectedCallback(): void;
    static get observedAttributes(): string[];
    attributeChangedCallback(_name: string, _oldValue: string, _newValue: string): void;
    draw(): void;
}
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