Add date validation, add url validation (and tracker cleaning), add date picker, close #44

UI/Input/CombinedInputElement.ts

@@ -0,0 +1,35 @@
+import {InputElement} from "./InputElement";
+import {UIEventSource} from "../../Logic/UIEventSource";
+import Combine from "../Base/Combine";
+import {UIElement} from "../UIElement";
+
+export default class CombinedInputElement<T> extends InputElement<T> {
+    private readonly _a: InputElement<T>;
+    private readonly _b: UIElement;
+    private readonly _combined: UIElement;
+    public readonly IsSelected: UIEventSource<boolean>;
+
+    constructor(a: InputElement<T>, b: InputElement<T>) {
+        super();
+        this._a = a;
+        this._b = b;
+        this.IsSelected = this._a.IsSelected.map((isSelected) => {
+            return isSelected || b.IsSelected.data
+        }, [b.IsSelected])
+        this._combined = new Combine([this._a, this._b]);
+    }
+
+    GetValue(): UIEventSource<T> {
+        return this._a.GetValue();
+    }
+
+    InnerRender(): string {
+        return this._combined.Render();
+    }
+
+
+    IsValid(t: T): boolean {
+        return this._a.IsValid(t);
+    }
+
+}