mapcomplete/UI/DropDownUI.ts
2020-06-28 00:06:23 +02:00

47 lines
No EOL
1.3 KiB
TypeScript

import {UIElement} from "./UIElement";
import {UIEventSource} from "./UIEventSource";
export class DropDownUI extends UIElement {
selectedElement: UIEventSource<string>
private _label: string;
private _values: { value: string; shown: string }[];
constructor(label: string, values: { value: string, shown: string }[]) {
super(undefined);
this._label = label;
this._values = values;
this.selectedElement = new UIEventSource<string>(values[0].value);
}
protected InnerRender(): string {
let options = "";
for (const value of this._values) {
options += "<option value='" + value.value + "'>" + value.shown + "</option>"
}
return "<form>" +
"<label for='dropdown-" + this.id + "'>" + this._label + "</label>" +
"<select name='dropdown-" + this.id + "' id='dropdown-" + this.id + "'>" +
options +
"</select>" +
"</form>";
}
InnerUpdate(htmlElement: HTMLElement) {
super.InnerUpdate(htmlElement);
const self = this;
const e = document.getElementById("dropdown-" + this.id);
e.onchange = function () {
// @ts-ignore
const selectedValue = e.options[e.selectedIndex].value;
self.selectedElement.setData(selectedValue);
}
}
}