import * as napi from "../rust-module.cjs";
/**
 * Model<T> is the interface for feeding dynamic data into
 * `.slint` views.
 *
 * A model is organized like a table with rows of data. The
 * fields of the data type T behave like columns.
 *
 * @template T the type of the model's items.
 *
 * ### Example
 * As an example let's see the implementation of {@link ArrayModel}
 *
 * ```js
 * export class ArrayModel<T> extends Model<T> {
 *    private a: Array<T>
 *
 *   constructor(arr: Array<T>) {
 *        super();
 *        this.a = arr;
 *    }
 *
 *    rowCount() {
 *        return this.a.length;
 *    }
 *
 *    rowData(row: number) {
 *       return this.a[row];
 *    }
 *
 *    setRowData(row: number, data: T) {
 *        this.a[row] = data;
 *        this.notifyRowDataChanged(row);
 *    }
 *
 *    push(...values: T[]) {
 *        let size = this.a.length;
 *        Array.prototype.push.apply(this.a, values);
 *        this.notifyRowAdded(size, arguments.length);
 *    }
 *
 *    remove(index: number, size: number) {
 *        let r = this.a.splice(index, size);
 *        this.notifyRowRemoved(index, size);
 *    }
 *
 *    get length(): number {
 *        return this.a.length;
 *    }
 *
 *    values(): IterableIterator<T> {
 *        return this.a.values();
 *    }
 *
 *    entries(): IterableIterator<[number, T]> {
 *        return this.a.entries()
 *    }
 *}
 * ```
 */
export declare abstract class Model<T> implements Iterable<T> {
    /**
     * @hidden
     */
    modelNotify: napi.ExternalObject<napi.SharedModelNotify>;
    /**
     * @hidden
     */
    constructor(modelNotify?: napi.ExternalObject<napi.SharedModelNotify>);
    /**
     * Implementations of this function must return the current number of rows.
     */
    abstract rowCount(): number;
    /**
     * Implementations of this function must return the data at the specified row.
     * @param row index in range 0..(rowCount() - 1).
     * @returns undefined if row is out of range otherwise the data.
     */
    abstract rowData(row: number): T | undefined;
    /**
     * Implementations of this function must store the provided data parameter
     * in the model at the specified row.
     * @param _row index in range 0..(rowCount() - 1).
     * @param _data new data item to store on the given row index
     */
    setRowData(_row: number, _data: T): void;
    [Symbol.iterator](): Iterator<T>;
    /**
     * Notifies the view that the data of the current row is changed.
     * @param row index of the changed row.
     */
    protected notifyRowDataChanged(row: number): void;
    /**
     * Notifies the view that multiple rows are added to the model.
     * @param row index of the first added row.
     * @param count the number of added items.
     */
    protected notifyRowAdded(row: number, count: number): void;
    /**
     * Notifies the view that multiple rows are removed to the model.
     * @param row index of the first removed row.
     * @param count the number of removed items.
     */
    protected notifyRowRemoved(row: number, count: number): void;
    /**
     * Notifies the view that the complete data must be reload.
     */
    protected notifyReset(): void;
}
/**
 * ArrayModel wraps a JavaScript array for use in `.slint` views. The underlying
 * array can be modified with the [[ArrayModel.push]] and [[ArrayModel.remove]] methods.
 */
export declare class ArrayModel<T> extends Model<T> {
    #private;
    /**
     * Creates a new ArrayModel.
     *
     * @param arr
     */
    constructor(arr: Array<T>);
    /**
     * Returns the number of entries in the array model.
     */
    get length(): number;
    /**
     * Returns the number of entries in the array model.
     */
    rowCount(): number;
    /**
     * Returns the data at the specified row.
     * @param row index in range 0..(rowCount() - 1).
     * @returns undefined if row is out of range otherwise the data.
     */
    rowData(row: number): T;
    /**
     * Stores the given data on the given row index and notifies run-time about the changed row.
     * @param row index in range 0..(rowCount() - 1).
     * @param data new data item to store on the given row index
     */
    setRowData(row: number, data: T): void;
    /**
     * Pushes new values to the array that's backing the model and notifies
     * the run-time about the added rows.
     * @param values list of values that will be pushed to the array.
     */
    push(...values: T[]): void;
    /**
     * Removes the last element from the array and returns it.
     *
     * @returns The removed element or undefined if the array is empty.
     */
    pop(): T | undefined;
    /**
     * Removes the specified number of element from the array that's backing
     * the model, starting at the specified index.
     * @param index index of first row to remove.
     * @param size number of rows to remove.
     */
    remove(index: number, size: number): void;
    /**
     * Returns an iterable of values in the array.
     */
    values(): IterableIterator<T>;
    /**
     * Returns an iterable of key, value pairs for every entry in the array.
     */
    entries(): IterableIterator<[number, T]>;
}