mapcomplete/UI/UIRadioButton.ts
2020-06-25 03:39:31 +02:00

106 lines
No EOL
3.2 KiB
TypeScript

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