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