106 lines
3.2 KiB
TypeScript
106 lines
3.2 KiB
TypeScript
import {UIElement} from "./UIElement";
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import {UIEventSource} from "./UIEventSource";
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import {FixedUiElement} from "./FixedUiElement";
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import $ from "jquery"
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export class UIRadioButton extends UIElement {
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public readonly SelectedElementIndex: UIEventSource<{ index: number, value: string }>
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= new UIEventSource<{ index: number, value: string }>(null);
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private readonly _elements: UIEventSource<{ element: UIElement, value: string }[]>
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constructor(elements: UIEventSource<{ element: UIElement, value: string }[]>) {
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super(elements);
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this._elements = elements;
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}
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static FromStrings(choices: string[]): UIRadioButton {
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const wrapped = [];
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for (const choice of choices) {
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wrapped.push({
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element: new FixedUiElement(choice),
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value: choice
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});
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}
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return new UIRadioButton(new UIEventSource<{ element: UIElement, value: string }[]>(wrapped))
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}
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private IdFor(i) {
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return 'radio-' + this.id + '-' + i;
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}
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protected InnerRender(): string {
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let body = "";
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let i = 0;
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for (const el of this._elements.data) {
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const uielement = el.element;
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const value = el.value;
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const htmlElement =
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'<input type="radio" id="' + this.IdFor(i) + '" name="radiogroup-' + this.id + '" value="' + value + '">' +
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'<label for="' + this.IdFor(i) + '">' + uielement.Render() + '</label>' +
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'<br>';
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body += htmlElement;
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i++;
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}
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return "<form id='" + this.id + "-form'>" + body + "</form>";
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}
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InnerUpdate(htmlElement: HTMLElement) {
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super.InnerUpdate(htmlElement);
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const self = this;
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function checkButtons() {
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for (let i = 0; i < self._elements.data.length; i++) {
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const el = document.getElementById(self.IdFor(i));
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// @ts-ignore
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if (el.checked) {
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var v = {index: i, value: self._elements.data[i].value}
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self.SelectedElementIndex.setData(v);
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}
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}
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}
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const el = document.getElementById(this.id);
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el.addEventListener("change",
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function () {
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checkButtons();
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}
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);
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if (this.SelectedElementIndex.data == null) {
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const el = document.getElementById(this.IdFor(0));
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el.checked = true;
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checkButtons();
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} else {
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// We check that what is selected matches the previous rendering
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var checked = -1;
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var expected = -1
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for (let i = 0; i < self._elements.data.length; i++) {
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const el = document.getElementById(self.IdFor(i));
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// @ts-ignore
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if (el.checked) {
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checked = i;
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}
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if (el.value === this.SelectedElementIndex.data.value) {
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expected = i;
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}
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}
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if (expected != checked) {
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const el = document.getElementById(this.IdFor(expected));
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// @ts-ignore
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el.checked = true;
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}
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}
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}
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} |